PostgreSQL Source Code  git master
libpq-fe.h File Reference
#include <stdio.h>
#include "postgres_ext.h"
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Data Structures

struct  pgNotify
 
struct  _PQprintOpt
 
struct  _PQconninfoOption
 
struct  PQArgBlock
 
struct  pgresAttDesc
 

Macros

#define PG_COPYRES_ATTRS   0x01
 
#define PG_COPYRES_TUPLES   0x02 /* Implies PG_COPYRES_ATTRS */
 
#define PG_COPYRES_EVENTS   0x04
 
#define PG_COPYRES_NOTICEHOOKS   0x08
 
#define PQsetdb(M_PGHOST, M_PGPORT, M_PGOPT, M_PGTTY, M_DBNAME)   PQsetdbLogin(M_PGHOST, M_PGPORT, M_PGOPT, M_PGTTY, M_DBNAME, NULL, NULL)
 
#define PQfreeNotify(ptr)   PQfreemem(ptr)
 
#define PQnoPasswordSupplied   "fe_sendauth: no password supplied\n"
 

Typedefs

typedef struct pg_conn PGconn
 
typedef struct pg_result PGresult
 
typedef struct pg_cancel PGcancel
 
typedef struct pgNotify PGnotify
 
typedef void(* PQnoticeReceiver) (void *arg, const PGresult *res)
 
typedef void(* PQnoticeProcessor) (void *arg, const char *message)
 
typedef char pqbool
 
typedef struct _PQprintOpt PQprintOpt
 
typedef struct _PQconninfoOption PQconninfoOption
 
typedef struct pgresAttDesc PGresAttDesc
 
typedef void(* pgthreadlock_t) (int acquire)
 

Enumerations

enum  ConnStatusType {
  CONNECTION_OK, CONNECTION_BAD, CONNECTION_STARTED, CONNECTION_MADE,
  CONNECTION_AWAITING_RESPONSE, CONNECTION_AUTH_OK, CONNECTION_SETENV, CONNECTION_SSL_STARTUP,
  CONNECTION_NEEDED, CONNECTION_CHECK_WRITABLE, CONNECTION_CONSUME, CONNECTION_GSS_STARTUP,
  CONNECTION_CHECK_TARGET
}
 
enum  PostgresPollingStatusType {
  PGRES_POLLING_FAILED = 0, PGRES_POLLING_READING, PGRES_POLLING_WRITING, PGRES_POLLING_OK,
  PGRES_POLLING_ACTIVE
}
 
enum  ExecStatusType {
  PGRES_EMPTY_QUERY = 0, PGRES_COMMAND_OK, PGRES_TUPLES_OK, PGRES_COPY_OUT,
  PGRES_COPY_IN, PGRES_BAD_RESPONSE, PGRES_NONFATAL_ERROR, PGRES_FATAL_ERROR,
  PGRES_COPY_BOTH, PGRES_SINGLE_TUPLE
}
 
enum  PGTransactionStatusType {
  PQTRANS_IDLE, PQTRANS_ACTIVE, PQTRANS_INTRANS, PQTRANS_INERROR,
  PQTRANS_UNKNOWN
}
 
enum  PGVerbosity { PQERRORS_TERSE, PQERRORS_DEFAULT, PQERRORS_VERBOSE, PQERRORS_SQLSTATE }
 
enum  PGContextVisibility { PQSHOW_CONTEXT_NEVER, PQSHOW_CONTEXT_ERRORS, PQSHOW_CONTEXT_ALWAYS }
 
enum  PGPing { PQPING_OK, PQPING_REJECT, PQPING_NO_RESPONSE, PQPING_NO_ATTEMPT }
 

Functions

PGconnPQconnectStart (const char *conninfo)
 
PGconnPQconnectStartParams (const char *const *keywords, const char *const *values, int expand_dbname)
 
PostgresPollingStatusType PQconnectPoll (PGconn *conn)
 
PGconnPQconnectdb (const char *conninfo)
 
PGconnPQconnectdbParams (const char *const *keywords, const char *const *values, int expand_dbname)
 
PGconnPQsetdbLogin (const char *pghost, const char *pgport, const char *pgoptions, const char *pgtty, const char *dbName, const char *login, const char *pwd)
 
void PQfinish (PGconn *conn)
 
PQconninfoOptionPQconndefaults (void)
 
PQconninfoOptionPQconninfoParse (const char *conninfo, char **errmsg)
 
PQconninfoOptionPQconninfo (PGconn *conn)
 
void PQconninfoFree (PQconninfoOption *connOptions)
 
int PQresetStart (PGconn *conn)
 
PostgresPollingStatusType PQresetPoll (PGconn *conn)
 
void PQreset (PGconn *conn)
 
PGcancelPQgetCancel (PGconn *conn)
 
void PQfreeCancel (PGcancel *cancel)
 
int PQcancel (PGcancel *cancel, char *errbuf, int errbufsize)
 
int PQrequestCancel (PGconn *conn)
 
char * PQdb (const PGconn *conn)
 
char * PQuser (const PGconn *conn)
 
char * PQpass (const PGconn *conn)
 
char * PQhost (const PGconn *conn)
 
char * PQhostaddr (const PGconn *conn)
 
char * PQport (const PGconn *conn)
 
char * PQtty (const PGconn *conn)
 
char * PQoptions (const PGconn *conn)
 
ConnStatusType PQstatus (const PGconn *conn)
 
PGTransactionStatusType PQtransactionStatus (const PGconn *conn)
 
const char * PQparameterStatus (const PGconn *conn, const char *paramName)
 
int PQprotocolVersion (const PGconn *conn)
 
int PQserverVersion (const PGconn *conn)
 
char * PQerrorMessage (const PGconn *conn)
 
int PQsocket (const PGconn *conn)
 
int PQbackendPID (const PGconn *conn)
 
int PQconnectionNeedsPassword (const PGconn *conn)
 
int PQconnectionUsedPassword (const PGconn *conn)
 
int PQclientEncoding (const PGconn *conn)
 
int PQsetClientEncoding (PGconn *conn, const char *encoding)
 
int PQsslInUse (PGconn *conn)
 
void * PQsslStruct (PGconn *conn, const char *struct_name)
 
const char * PQsslAttribute (PGconn *conn, const char *attribute_name)
 
const char *const * PQsslAttributeNames (PGconn *conn)
 
void * PQgetssl (PGconn *conn)
 
void PQinitSSL (int do_init)
 
void PQinitOpenSSL (int do_ssl, int do_crypto)
 
int PQgssEncInUse (PGconn *conn)
 
void * PQgetgssctx (PGconn *conn)
 
PGVerbosity PQsetErrorVerbosity (PGconn *conn, PGVerbosity verbosity)
 
PGContextVisibility PQsetErrorContextVisibility (PGconn *conn, PGContextVisibility show_context)
 
void PQtrace (PGconn *conn, FILE *debug_port)
 
void PQuntrace (PGconn *conn)
 
PQnoticeReceiver PQsetNoticeReceiver (PGconn *conn, PQnoticeReceiver proc, void *arg)
 
PQnoticeProcessor PQsetNoticeProcessor (PGconn *conn, PQnoticeProcessor proc, void *arg)
 
pgthreadlock_t PQregisterThreadLock (pgthreadlock_t newhandler)
 
PGresultPQexec (PGconn *conn, const char *query)
 
PGresultPQexecParams (PGconn *conn, const char *command, int nParams, const Oid *paramTypes, const char *const *paramValues, const int *paramLengths, const int *paramFormats, int resultFormat)
 
PGresultPQprepare (PGconn *conn, const char *stmtName, const char *query, int nParams, const Oid *paramTypes)
 
PGresultPQexecPrepared (PGconn *conn, const char *stmtName, int nParams, const char *const *paramValues, const int *paramLengths, const int *paramFormats, int resultFormat)
 
int PQsendQuery (PGconn *conn, const char *query)
 
int PQsendQueryParams (PGconn *conn, const char *command, int nParams, const Oid *paramTypes, const char *const *paramValues, const int *paramLengths, const int *paramFormats, int resultFormat)
 
int PQsendPrepare (PGconn *conn, const char *stmtName, const char *query, int nParams, const Oid *paramTypes)
 
int PQsendQueryPrepared (PGconn *conn, const char *stmtName, int nParams, const char *const *paramValues, const int *paramLengths, const int *paramFormats, int resultFormat)
 
int PQsetSingleRowMode (PGconn *conn)
 
PGresultPQgetResult (PGconn *conn)
 
int PQisBusy (PGconn *conn)
 
int PQconsumeInput (PGconn *conn)
 
PGnotifyPQnotifies (PGconn *conn)
 
int PQputCopyData (PGconn *conn, const char *buffer, int nbytes)
 
int PQputCopyEnd (PGconn *conn, const char *errormsg)
 
int PQgetCopyData (PGconn *conn, char **buffer, int async)
 
int PQgetline (PGconn *conn, char *string, int length)
 
int PQputline (PGconn *conn, const char *string)
 
int PQgetlineAsync (PGconn *conn, char *buffer, int bufsize)
 
int PQputnbytes (PGconn *conn, const char *buffer, int nbytes)
 
int PQendcopy (PGconn *conn)
 
int PQsetnonblocking (PGconn *conn, int arg)
 
int PQisnonblocking (const PGconn *conn)
 
int PQisthreadsafe (void)
 
PGPing PQping (const char *conninfo)
 
PGPing PQpingParams (const char *const *keywords, const char *const *values, int expand_dbname)
 
int PQflush (PGconn *conn)
 
PGresultPQfn (PGconn *conn, int fnid, int *result_buf, int *result_len, int result_is_int, const PQArgBlock *args, int nargs)
 
ExecStatusType PQresultStatus (const PGresult *res)
 
char * PQresStatus (ExecStatusType status)
 
char * PQresultErrorMessage (const PGresult *res)
 
char * PQresultVerboseErrorMessage (const PGresult *res, PGVerbosity verbosity, PGContextVisibility show_context)
 
char * PQresultErrorField (const PGresult *res, int fieldcode)
 
int PQntuples (const PGresult *res)
 
int PQnfields (const PGresult *res)
 
int PQbinaryTuples (const PGresult *res)
 
char * PQfname (const PGresult *res, int field_num)
 
int PQfnumber (const PGresult *res, const char *field_name)
 
Oid PQftable (const PGresult *res, int field_num)
 
int PQftablecol (const PGresult *res, int field_num)
 
int PQfformat (const PGresult *res, int field_num)
 
Oid PQftype (const PGresult *res, int field_num)
 
int PQfsize (const PGresult *res, int field_num)
 
int PQfmod (const PGresult *res, int field_num)
 
char * PQcmdStatus (PGresult *res)
 
char * PQoidStatus (const PGresult *res)
 
Oid PQoidValue (const PGresult *res)
 
char * PQcmdTuples (PGresult *res)
 
char * PQgetvalue (const PGresult *res, int tup_num, int field_num)
 
int PQgetlength (const PGresult *res, int tup_num, int field_num)
 
int PQgetisnull (const PGresult *res, int tup_num, int field_num)
 
int PQnparams (const PGresult *res)
 
Oid PQparamtype (const PGresult *res, int param_num)
 
PGresultPQdescribePrepared (PGconn *conn, const char *stmt)
 
PGresultPQdescribePortal (PGconn *conn, const char *portal)
 
int PQsendDescribePrepared (PGconn *conn, const char *stmt)
 
int PQsendDescribePortal (PGconn *conn, const char *portal)
 
void PQclear (PGresult *res)
 
void PQfreemem (void *ptr)
 
PGresultPQmakeEmptyPGresult (PGconn *conn, ExecStatusType status)
 
PGresultPQcopyResult (const PGresult *src, int flags)
 
int PQsetResultAttrs (PGresult *res, int numAttributes, PGresAttDesc *attDescs)
 
void * PQresultAlloc (PGresult *res, size_t nBytes)
 
size_t PQresultMemorySize (const PGresult *res)
 
int PQsetvalue (PGresult *res, int tup_num, int field_num, char *value, int len)
 
size_t PQescapeStringConn (PGconn *conn, char *to, const char *from, size_t length, int *error)
 
char * PQescapeLiteral (PGconn *conn, const char *str, size_t len)
 
char * PQescapeIdentifier (PGconn *conn, const char *str, size_t len)
 
unsigned char * PQescapeByteaConn (PGconn *conn, const unsigned char *from, size_t from_length, size_t *to_length)
 
unsigned char * PQunescapeBytea (const unsigned char *strtext, size_t *retbuflen)
 
size_t PQescapeString (char *to, const char *from, size_t length)
 
unsigned char * PQescapeBytea (const unsigned char *from, size_t from_length, size_t *to_length)
 
void PQprint (FILE *fout, const PGresult *res, const PQprintOpt *ps)
 
void PQdisplayTuples (const PGresult *res, FILE *fp, int fillAlign, const char *fieldSep, int printHeader, int quiet)
 
void PQprintTuples (const PGresult *res, FILE *fout, int PrintAttNames, int TerseOutput, int colWidth)
 
int lo_open (PGconn *conn, Oid lobjId, int mode)
 
int lo_close (PGconn *conn, int fd)
 
int lo_read (PGconn *conn, int fd, char *buf, size_t len)
 
int lo_write (PGconn *conn, int fd, const char *buf, size_t len)
 
int lo_lseek (PGconn *conn, int fd, int offset, int whence)
 
pg_int64 lo_lseek64 (PGconn *conn, int fd, pg_int64 offset, int whence)
 
Oid lo_creat (PGconn *conn, int mode)
 
Oid lo_create (PGconn *conn, Oid lobjId)
 
int lo_tell (PGconn *conn, int fd)
 
pg_int64 lo_tell64 (PGconn *conn, int fd)
 
int lo_truncate (PGconn *conn, int fd, size_t len)
 
int lo_truncate64 (PGconn *conn, int fd, pg_int64 len)
 
int lo_unlink (PGconn *conn, Oid lobjId)
 
Oid lo_import (PGconn *conn, const char *filename)
 
Oid lo_import_with_oid (PGconn *conn, const char *filename, Oid lobjId)
 
int lo_export (PGconn *conn, Oid lobjId, const char *filename)
 
int PQlibVersion (void)
 
int PQmblen (const char *s, int encoding)
 
int PQdsplen (const char *s, int encoding)
 
int PQenv2encoding (void)
 
char * PQencryptPassword (const char *passwd, const char *user)
 
char * PQencryptPasswordConn (PGconn *conn, const char *passwd, const char *user, const char *algorithm)
 
int pg_char_to_encoding (const char *name)
 
const char * pg_encoding_to_char (int encoding)
 
int pg_valid_server_encoding_id (int encoding)
 

Macro Definition Documentation

◆ PG_COPYRES_ATTRS

#define PG_COPYRES_ATTRS   0x01

Definition at line 34 of file libpq-fe.h.

Referenced by PQcopyResult(), and pqRowProcessor().

◆ PG_COPYRES_EVENTS

#define PG_COPYRES_EVENTS   0x04

Definition at line 36 of file libpq-fe.h.

Referenced by PQcopyResult(), and pqRowProcessor().

◆ PG_COPYRES_NOTICEHOOKS

#define PG_COPYRES_NOTICEHOOKS   0x08

Definition at line 37 of file libpq-fe.h.

Referenced by PQcopyResult(), and pqRowProcessor().

◆ PG_COPYRES_TUPLES

#define PG_COPYRES_TUPLES   0x02 /* Implies PG_COPYRES_ATTRS */

Definition at line 35 of file libpq-fe.h.

Referenced by PQcopyResult().

◆ PQfreeNotify

#define PQfreeNotify (   ptr)    PQfreemem(ptr)

Definition at line 518 of file libpq-fe.h.

◆ PQnoPasswordSupplied

#define PQnoPasswordSupplied   "fe_sendauth: no password supplied\n"

Definition at line 522 of file libpq-fe.h.

Referenced by pg_fe_sendauth(), and pg_SASL_init().

◆ PQsetdb

#define PQsetdb (   M_PGHOST,
  M_PGPORT,
  M_PGOPT,
  M_PGTTY,
  M_DBNAME 
)    PQsetdbLogin(M_PGHOST, M_PGPORT, M_PGOPT, M_PGTTY, M_DBNAME, NULL, NULL)

Definition at line 272 of file libpq-fe.h.

Referenced by main().

Typedef Documentation

◆ PGcancel

Definition at line 156 of file libpq-fe.h.

◆ PGconn

Definition at line 143 of file libpq-fe.h.

◆ PGnotify

◆ PGresAttDesc

◆ PGresult

Definition at line 150 of file libpq-fe.h.

◆ pgthreadlock_t

typedef void(* pgthreadlock_t) (int acquire)

Definition at line 384 of file libpq-fe.h.

◆ pqbool

Definition at line 178 of file libpq-fe.h.

◆ PQconninfoOption

◆ PQnoticeProcessor

typedef void(* PQnoticeProcessor) (void *arg, const char *message)

Definition at line 175 of file libpq-fe.h.

◆ PQnoticeReceiver

typedef void(* PQnoticeReceiver) (void *arg, const PGresult *res)

Definition at line 174 of file libpq-fe.h.

◆ PQprintOpt

Enumeration Type Documentation

◆ ConnStatusType

Enumerator
CONNECTION_OK 
CONNECTION_BAD 
CONNECTION_STARTED 
CONNECTION_MADE 
CONNECTION_AWAITING_RESPONSE 
CONNECTION_AUTH_OK 
CONNECTION_SETENV 
CONNECTION_SSL_STARTUP 
CONNECTION_NEEDED 
CONNECTION_CHECK_WRITABLE 
CONNECTION_CONSUME 
CONNECTION_GSS_STARTUP 
CONNECTION_CHECK_TARGET 

Definition at line 47 of file libpq-fe.h.

48 {
51  /* Non-blocking mode only below here */
52 
53  /*
54  * The existence of these should never be relied upon - they should only
55  * be used for user feedback or similar purposes.
56  */
57  CONNECTION_STARTED, /* Waiting for connection to be made. */
58  CONNECTION_MADE, /* Connection OK; waiting to send. */
59  CONNECTION_AWAITING_RESPONSE, /* Waiting for a response from the
60  * postmaster. */
61  CONNECTION_AUTH_OK, /* Received authentication; waiting for
62  * backend startup. */
63  CONNECTION_SETENV, /* Negotiating environment. */
64  CONNECTION_SSL_STARTUP, /* Negotiating SSL. */
65  CONNECTION_NEEDED, /* Internal state: connect() needed */
66  CONNECTION_CHECK_WRITABLE, /* Check if we could make a writable
67  * connection. */
68  CONNECTION_CONSUME, /* Wait for any pending message and consume
69  * them. */
70  CONNECTION_GSS_STARTUP, /* Negotiating GSSAPI. */
71  CONNECTION_CHECK_TARGET /* Check if we have a proper target connection */
ConnStatusType
Definition: libpq-fe.h:47

◆ ExecStatusType

Enumerator
PGRES_EMPTY_QUERY 
PGRES_COMMAND_OK 
PGRES_TUPLES_OK 
PGRES_COPY_OUT 
PGRES_COPY_IN 
PGRES_BAD_RESPONSE 
PGRES_NONFATAL_ERROR 
PGRES_FATAL_ERROR 
PGRES_COPY_BOTH 
PGRES_SINGLE_TUPLE 

Definition at line 84 of file libpq-fe.h.

85 {
86  PGRES_EMPTY_QUERY = 0, /* empty query string was executed */
87  PGRES_COMMAND_OK, /* a query command that doesn't return
88  * anything was executed properly by the
89  * backend */
90  PGRES_TUPLES_OK, /* a query command that returns tuples was
91  * executed properly by the backend, PGresult
92  * contains the result tuples */
93  PGRES_COPY_OUT, /* Copy Out data transfer in progress */
94  PGRES_COPY_IN, /* Copy In data transfer in progress */
95  PGRES_BAD_RESPONSE, /* an unexpected response was recv'd from the
96  * backend */
97  PGRES_NONFATAL_ERROR, /* notice or warning message */
98  PGRES_FATAL_ERROR, /* query failed */
99  PGRES_COPY_BOTH, /* Copy In/Out data transfer in progress */
100  PGRES_SINGLE_TUPLE /* single tuple from larger resultset */
ExecStatusType
Definition: libpq-fe.h:84

◆ PGContextVisibility

Enumerator
PQSHOW_CONTEXT_NEVER 
PQSHOW_CONTEXT_ERRORS 
PQSHOW_CONTEXT_ALWAYS 

Definition at line 120 of file libpq-fe.h.

121 {
122  PQSHOW_CONTEXT_NEVER, /* never show CONTEXT field */
123  PQSHOW_CONTEXT_ERRORS, /* show CONTEXT for errors only (default) */
124  PQSHOW_CONTEXT_ALWAYS /* always show CONTEXT field */
PGContextVisibility
Definition: libpq-fe.h:120

◆ PGPing

enum PGPing
Enumerator
PQPING_OK 
PQPING_REJECT 
PQPING_NO_RESPONSE 
PQPING_NO_ATTEMPT 

Definition at line 132 of file libpq-fe.h.

133 {
134  PQPING_OK, /* server is accepting connections */
135  PQPING_REJECT, /* server is alive but rejecting connections */
136  PQPING_NO_RESPONSE, /* could not establish connection */
137  PQPING_NO_ATTEMPT /* connection not attempted (bad params) */
138 } PGPing;
PGPing
Definition: libpq-fe.h:132

◆ PGTransactionStatusType

Enumerator
PQTRANS_IDLE 
PQTRANS_ACTIVE 
PQTRANS_INTRANS 
PQTRANS_INERROR 
PQTRANS_UNKNOWN 

Definition at line 103 of file libpq-fe.h.

104 {
105  PQTRANS_IDLE, /* connection idle */
106  PQTRANS_ACTIVE, /* command in progress */
107  PQTRANS_INTRANS, /* idle, within transaction block */
108  PQTRANS_INERROR, /* idle, within failed transaction */
109  PQTRANS_UNKNOWN /* cannot determine status */
PGTransactionStatusType
Definition: libpq-fe.h:103

◆ PGVerbosity

Enumerator
PQERRORS_TERSE 
PQERRORS_DEFAULT 
PQERRORS_VERBOSE 
PQERRORS_SQLSTATE 

Definition at line 112 of file libpq-fe.h.

113 {
114  PQERRORS_TERSE, /* single-line error messages */
115  PQERRORS_DEFAULT, /* recommended style */
116  PQERRORS_VERBOSE, /* all the facts, ma'am */
117  PQERRORS_SQLSTATE /* only error severity and SQLSTATE code */
118 } PGVerbosity;
PGVerbosity
Definition: libpq-fe.h:112

◆ PostgresPollingStatusType

Enumerator
PGRES_POLLING_FAILED 
PGRES_POLLING_READING 
PGRES_POLLING_WRITING 
PGRES_POLLING_OK 
PGRES_POLLING_ACTIVE 

Definition at line 74 of file libpq-fe.h.

75 {
77  PGRES_POLLING_READING, /* These two indicate that one may */
78  PGRES_POLLING_WRITING, /* use select before polling again. */
80  PGRES_POLLING_ACTIVE /* unused; keep for awhile for backwards
81  * compatibility */
PostgresPollingStatusType
Definition: libpq-fe.h:74

Function Documentation

◆ lo_close()

int lo_close ( PGconn conn,
int  fd 
)

Definition at line 99 of file fe-lobj.c.

References fd(), pgLobjfuncs::fn_lo_close, PQArgBlock::integer, PQArgBlock::isint, PQArgBlock::len, lo_initialize(), pg_conn::lobjfuncs, PGRES_COMMAND_OK, PQclear(), PQfn(), PQresultStatus(), and PQArgBlock::u.

Referenced by dumpBlobs(), EndRestoreBlob(), exportFile(), importFile(), lo_export(), lo_import_internal(), my_truncate(), overwrite(), and pickout().

100 {
101  PQArgBlock argv[1];
102  PGresult *res;
103  int retval;
104  int result_len;
105 
106  if (conn == NULL || conn->lobjfuncs == NULL)
107  {
108  if (lo_initialize(conn) < 0)
109  return -1;
110  }
111 
112  argv[0].isint = 1;
113  argv[0].len = 4;
114  argv[0].u.integer = fd;
115  res = PQfn(conn, conn->lobjfuncs->fn_lo_close,
116  &retval, &result_len, 1, argv, 1);
117  if (PQresultStatus(res) == PGRES_COMMAND_OK)
118  {
119  PQclear(res);
120  return retval;
121  }
122  else
123  {
124  PQclear(res);
125  return -1;
126  }
127 }
PGresult * PQfn(PGconn *conn, int fnid, int *result_buf, int *result_len, int result_is_int, const PQArgBlock *args, int nargs)
Definition: fe-exec.c:2653
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:2693
void PQclear(PGresult *res)
Definition: fe-exec.c:695
union PQArgBlock::@163 u
Oid fn_lo_close
Definition: libpq-int.h:271
int isint
Definition: libpq-fe.h:226
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:436
int integer
Definition: libpq-fe.h:230
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:876

◆ lo_creat()

Oid lo_creat ( PGconn conn,
int  mode 
)

Definition at line 465 of file fe-lobj.c.

References pgLobjfuncs::fn_lo_creat, PQArgBlock::integer, InvalidOid, PQArgBlock::isint, PQArgBlock::len, lo_initialize(), pg_conn::lobjfuncs, mode, PGRES_COMMAND_OK, PQclear(), PQfn(), PQresultStatus(), and PQArgBlock::u.

Referenced by importFile(), and lo_import_internal().

466 {
467  PQArgBlock argv[1];
468  PGresult *res;
469  int retval;
470  int result_len;
471 
472  if (conn == NULL || conn->lobjfuncs == NULL)
473  {
474  if (lo_initialize(conn) < 0)
475  return InvalidOid;
476  }
477 
478  argv[0].isint = 1;
479  argv[0].len = 4;
480  argv[0].u.integer = mode;
481  res = PQfn(conn, conn->lobjfuncs->fn_lo_creat,
482  &retval, &result_len, 1, argv, 1);
483  if (PQresultStatus(res) == PGRES_COMMAND_OK)
484  {
485  PQclear(res);
486  return (Oid) retval;
487  }
488  else
489  {
490  PQclear(res);
491  return InvalidOid;
492  }
493 }
static PgChecksumMode mode
Definition: pg_checksums.c:61
unsigned int Oid
Definition: postgres_ext.h:31
PGresult * PQfn(PGconn *conn, int fnid, int *result_buf, int *result_len, int result_is_int, const PQArgBlock *args, int nargs)
Definition: fe-exec.c:2653
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:2693
#define InvalidOid
Definition: postgres_ext.h:36
void PQclear(PGresult *res)
Definition: fe-exec.c:695
union PQArgBlock::@163 u
Oid fn_lo_creat
Definition: libpq-int.h:272
int isint
Definition: libpq-fe.h:226
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:436
int integer
Definition: libpq-fe.h:230
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:876

◆ lo_create()

Oid lo_create ( PGconn conn,
Oid  lobjId 
)

Definition at line 504 of file fe-lobj.c.

References pg_conn::errorMessage, pgLobjfuncs::fn_lo_create, PQArgBlock::integer, InvalidOid, PQArgBlock::isint, PQArgBlock::len, libpq_gettext, lo_initialize(), pg_conn::lobjfuncs, PGRES_COMMAND_OK, PQclear(), PQfn(), PQresultStatus(), printfPQExpBuffer(), and PQArgBlock::u.

Referenced by lo_import_internal(), and StartRestoreBlob().

505 {
506  PQArgBlock argv[1];
507  PGresult *res;
508  int retval;
509  int result_len;
510 
511  if (conn == NULL || conn->lobjfuncs == NULL)
512  {
513  if (lo_initialize(conn) < 0)
514  return InvalidOid;
515  }
516 
517  /* Must check this on-the-fly because it's not there pre-8.1 */
518  if (conn->lobjfuncs->fn_lo_create == 0)
519  {
521  libpq_gettext("cannot determine OID of function lo_create\n"));
522  return InvalidOid;
523  }
524 
525  argv[0].isint = 1;
526  argv[0].len = 4;
527  argv[0].u.integer = lobjId;
528  res = PQfn(conn, conn->lobjfuncs->fn_lo_create,
529  &retval, &result_len, 1, argv, 1);
530  if (PQresultStatus(res) == PGRES_COMMAND_OK)
531  {
532  PQclear(res);
533  return (Oid) retval;
534  }
535  else
536  {
537  PQclear(res);
538  return InvalidOid;
539  }
540 }
void printfPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:237
Oid fn_lo_create
Definition: libpq-int.h:273
unsigned int Oid
Definition: postgres_ext.h:31
PGresult * PQfn(PGconn *conn, int fnid, int *result_buf, int *result_len, int result_is_int, const PQArgBlock *args, int nargs)
Definition: fe-exec.c:2653
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:2693
PQExpBufferData errorMessage
Definition: libpq-int.h:509
#define InvalidOid
Definition: postgres_ext.h:36
void PQclear(PGresult *res)
Definition: fe-exec.c:695
union PQArgBlock::@163 u
int isint
Definition: libpq-fe.h:226
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:436
#define libpq_gettext(x)
Definition: libpq-int.h:788
int integer
Definition: libpq-fe.h:230
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:876

◆ lo_export()

int lo_export ( PGconn conn,
Oid  lobjId,
const char *  filename 
)

Definition at line 784 of file fe-lobj.c.

References buf, close, pg_conn::errorMessage, fd(), INV_READ, libpq_gettext, LO_BUFSIZE, lo_close(), lo_open(), lo_read(), PG_BINARY, PG_STRERROR_R_BUFLEN, printfPQExpBuffer(), strerror_r, and write.

Referenced by do_lo_export(), and main().

785 {
786  int result = 1;
787  int fd;
788  int nbytes,
789  tmp;
790  char buf[LO_BUFSIZE];
791  int lobj;
792  char sebuf[PG_STRERROR_R_BUFLEN];
793 
794  /*
795  * open the large object.
796  */
797  lobj = lo_open(conn, lobjId, INV_READ);
798  if (lobj == -1)
799  {
800  /* we assume lo_open() already set a suitable error message */
801  return -1;
802  }
803 
804  /*
805  * create the file to be written to
806  */
807  fd = open(filename, O_CREAT | O_WRONLY | O_TRUNC | PG_BINARY, 0666);
808  if (fd < 0)
809  {
810  /* We must do lo_close before setting the errorMessage */
811  int save_errno = errno;
812 
813  (void) lo_close(conn, lobj);
815  libpq_gettext("could not open file \"%s\": %s\n"),
816  filename,
817  strerror_r(save_errno, sebuf, sizeof(sebuf)));
818  return -1;
819  }
820 
821  /*
822  * read in from the large object and write to the file
823  */
824  while ((nbytes = lo_read(conn, lobj, buf, LO_BUFSIZE)) > 0)
825  {
826  tmp = write(fd, buf, nbytes);
827  if (tmp != nbytes)
828  {
829  /* We must do lo_close before setting the errorMessage */
830  int save_errno = errno;
831 
832  (void) lo_close(conn, lobj);
833  (void) close(fd);
835  libpq_gettext("could not write to file \"%s\": %s\n"),
836  filename,
837  strerror_r(save_errno, sebuf, sizeof(sebuf)));
838  return -1;
839  }
840  }
841 
842  /*
843  * If lo_read() failed, we are now in an aborted transaction so there's no
844  * need for lo_close(); furthermore, if we tried it we'd overwrite the
845  * useful error result with a useless one. So skip lo_close() if we got a
846  * failure result.
847  */
848  if (nbytes < 0 ||
849  lo_close(conn, lobj) != 0)
850  {
851  /* assume lo_read() or lo_close() left a suitable error message */
852  result = -1;
853  }
854 
855  /* if we already failed, don't overwrite that msg with a close error */
856  if (close(fd) != 0 && result >= 0)
857  {
859  libpq_gettext("could not write to file \"%s\": %s\n"),
860  filename, strerror_r(errno, sebuf, sizeof(sebuf)));
861  result = -1;
862  }
863 
864  return result;
865 }
void printfPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:237
#define write(a, b, c)
Definition: win32.h:14
#define PG_STRERROR_R_BUFLEN
Definition: port.h:210
static int fd(const char *x, int i)
Definition: preproc-init.c:105
#define PG_BINARY
Definition: c.h:1191
#define INV_READ
Definition: libpq-fs.h:22
int lo_close(PGconn *conn, int fd)
Definition: fe-lobj.c:99
static char * buf
Definition: pg_test_fsync.c:68
int lo_open(PGconn *conn, Oid lobjId, int mode)
Definition: fe-lobj.c:57
PQExpBufferData errorMessage
Definition: libpq-int.h:509
#define LO_BUFSIZE
Definition: fe-lobj.c:42
#define strerror_r
Definition: port.h:209
static char * filename
Definition: pg_dumpall.c:91
int lo_read(PGconn *conn, int fd, char *buf, size_t len)
Definition: fe-lobj.c:258
#define close(a)
Definition: win32.h:12
#define libpq_gettext(x)
Definition: libpq-int.h:788

◆ lo_import()

Oid lo_import ( PGconn conn,
const char *  filename 
)

Definition at line 668 of file fe-lobj.c.

References InvalidOid, and lo_import_internal().

Referenced by do_lo_import(), and main().

669 {
670  return lo_import_internal(conn, filename, InvalidOid);
671 }
static Oid lo_import_internal(PGconn *conn, const char *filename, Oid oid)
Definition: fe-lobj.c:689
#define InvalidOid
Definition: postgres_ext.h:36
static char * filename
Definition: pg_dumpall.c:91

◆ lo_import_with_oid()

Oid lo_import_with_oid ( PGconn conn,
const char *  filename,
Oid  lobjId 
)

Definition at line 683 of file fe-lobj.c.

References lo_import_internal().

684 {
685  return lo_import_internal(conn, filename, lobjId);
686 }
static Oid lo_import_internal(PGconn *conn, const char *filename, Oid oid)
Definition: fe-lobj.c:689
static char * filename
Definition: pg_dumpall.c:91

◆ lo_lseek()

int lo_lseek ( PGconn conn,
int  fd,
int  offset,
int  whence 
)

Definition at line 365 of file fe-lobj.c.

References fd(), pgLobjfuncs::fn_lo_lseek, PQArgBlock::integer, PQArgBlock::isint, PQArgBlock::len, lo_initialize(), pg_conn::lobjfuncs, PGRES_COMMAND_OK, PQclear(), PQfn(), PQresultStatus(), and PQArgBlock::u.

Referenced by overwrite(), and pickout().

366 {
367  PQArgBlock argv[3];
368  PGresult *res;
369  int retval;
370  int result_len;
371 
372  if (conn == NULL || conn->lobjfuncs == NULL)
373  {
374  if (lo_initialize(conn) < 0)
375  return -1;
376  }
377 
378  argv[0].isint = 1;
379  argv[0].len = 4;
380  argv[0].u.integer = fd;
381 
382  argv[1].isint = 1;
383  argv[1].len = 4;
384  argv[1].u.integer = offset;
385 
386  argv[2].isint = 1;
387  argv[2].len = 4;
388  argv[2].u.integer = whence;
389 
390  res = PQfn(conn, conn->lobjfuncs->fn_lo_lseek,
391  &retval, &result_len, 1, argv, 3);
392  if (PQresultStatus(res) == PGRES_COMMAND_OK)
393  {
394  PQclear(res);
395  return retval;
396  }
397  else
398  {
399  PQclear(res);
400  return -1;
401  }
402 }
Oid fn_lo_lseek
Definition: libpq-int.h:275
PGresult * PQfn(PGconn *conn, int fnid, int *result_buf, int *result_len, int result_is_int, const PQArgBlock *args, int nargs)
Definition: fe-exec.c:2653
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:2693
void PQclear(PGresult *res)
Definition: fe-exec.c:695
union PQArgBlock::@163 u
int isint
Definition: libpq-fe.h:226
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:436
int integer
Definition: libpq-fe.h:230
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:876

◆ lo_lseek64()

pg_int64 lo_lseek64 ( PGconn conn,
int  fd,
pg_int64  offset,
int  whence 
)

Definition at line 409 of file fe-lobj.c.

References pg_conn::errorMessage, fd(), pgLobjfuncs::fn_lo_lseek64, PQArgBlock::integer, PQArgBlock::isint, PQArgBlock::len, libpq_gettext, lo_hton64(), lo_initialize(), lo_ntoh64(), pg_conn::lobjfuncs, PGRES_COMMAND_OK, PQclear(), PQfn(), PQresultStatus(), printfPQExpBuffer(), PQArgBlock::ptr, and PQArgBlock::u.

Referenced by overwrite(), and pickout().

410 {
411  PQArgBlock argv[3];
412  PGresult *res;
413  pg_int64 retval;
414  int result_len;
415 
416  if (conn == NULL || conn->lobjfuncs == NULL)
417  {
418  if (lo_initialize(conn) < 0)
419  return -1;
420  }
421 
422  if (conn->lobjfuncs->fn_lo_lseek64 == 0)
423  {
425  libpq_gettext("cannot determine OID of function lo_lseek64\n"));
426  return -1;
427  }
428 
429  argv[0].isint = 1;
430  argv[0].len = 4;
431  argv[0].u.integer = fd;
432 
433  offset = lo_hton64(offset);
434  argv[1].isint = 0;
435  argv[1].len = 8;
436  argv[1].u.ptr = (int *) &offset;
437 
438  argv[2].isint = 1;
439  argv[2].len = 4;
440  argv[2].u.integer = whence;
441 
442  res = PQfn(conn, conn->lobjfuncs->fn_lo_lseek64,
443  (void *) &retval, &result_len, 0, argv, 3);
444  if (PQresultStatus(res) == PGRES_COMMAND_OK && result_len == 8)
445  {
446  PQclear(res);
447  return lo_ntoh64(retval);
448  }
449  else
450  {
451  PQclear(res);
452  return -1;
453  }
454 }
void printfPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:237
PGresult * PQfn(PGconn *conn, int fnid, int *result_buf, int *result_len, int result_is_int, const PQArgBlock *args, int nargs)
Definition: fe-exec.c:2653
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:2693
PG_INT64_TYPE pg_int64
Definition: postgres_ext.h:47
static pg_int64 lo_hton64(pg_int64 host64)
Definition: fe-lobj.c:1061
PQExpBufferData errorMessage
Definition: libpq-int.h:509
void PQclear(PGresult *res)
Definition: fe-exec.c:695
union PQArgBlock::@163 u
Oid fn_lo_lseek64
Definition: libpq-int.h:276
int isint
Definition: libpq-fe.h:226
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:436
int * ptr
Definition: libpq-fe.h:229
#define libpq_gettext(x)
Definition: libpq-int.h:788
int integer
Definition: libpq-fe.h:230
static pg_int64 lo_ntoh64(pg_int64 net64)
Definition: fe-lobj.c:1086
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:876

◆ lo_open()

int lo_open ( PGconn conn,
Oid  lobjId,
int  mode 
)

Definition at line 57 of file fe-lobj.c.

References fd(), pgLobjfuncs::fn_lo_open, PQArgBlock::integer, PQArgBlock::isint, PQArgBlock::len, lo_initialize(), pg_conn::lobjfuncs, mode, PGRES_COMMAND_OK, PQclear(), PQfn(), PQresultStatus(), and PQArgBlock::u.

Referenced by dumpBlobs(), exportFile(), importFile(), lo_export(), lo_import_internal(), my_truncate(), overwrite(), pickout(), and StartRestoreBlob().

58 {
59  int fd;
60  int result_len;
61  PQArgBlock argv[2];
62  PGresult *res;
63 
64  if (conn == NULL || conn->lobjfuncs == NULL)
65  {
66  if (lo_initialize(conn) < 0)
67  return -1;
68  }
69 
70  argv[0].isint = 1;
71  argv[0].len = 4;
72  argv[0].u.integer = lobjId;
73 
74  argv[1].isint = 1;
75  argv[1].len = 4;
76  argv[1].u.integer = mode;
77 
78  res = PQfn(conn, conn->lobjfuncs->fn_lo_open, &fd, &result_len, 1, argv, 2);
79  if (PQresultStatus(res) == PGRES_COMMAND_OK)
80  {
81  PQclear(res);
82  return fd;
83  }
84  else
85  {
86  PQclear(res);
87  return -1;
88  }
89 }
static PgChecksumMode mode
Definition: pg_checksums.c:61
PGresult * PQfn(PGconn *conn, int fnid, int *result_buf, int *result_len, int result_is_int, const PQArgBlock *args, int nargs)
Definition: fe-exec.c:2653
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:2693
Oid fn_lo_open
Definition: libpq-int.h:270
void PQclear(PGresult *res)
Definition: fe-exec.c:695
union PQArgBlock::@163 u
int isint
Definition: libpq-fe.h:226
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:436
int integer
Definition: libpq-fe.h:230
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:876

◆ lo_read()

int lo_read ( PGconn conn,
int  fd,
char *  buf,
size_t  len 
)

Definition at line 258 of file fe-lobj.c.

References pg_conn::errorMessage, fd(), pgLobjfuncs::fn_lo_read, PQArgBlock::integer, PQArgBlock::isint, PQArgBlock::len, libpq_gettext, lo_initialize(), pg_conn::lobjfuncs, PGRES_COMMAND_OK, PQclear(), PQfn(), PQresultStatus(), printfPQExpBuffer(), and PQArgBlock::u.

Referenced by lo_export().

259 {
260  PQArgBlock argv[2];
261  PGresult *res;
262  int result_len;
263 
264  if (conn == NULL || conn->lobjfuncs == NULL)
265  {
266  if (lo_initialize(conn) < 0)
267  return -1;
268  }
269 
270  /*
271  * Long ago, somebody thought it'd be a good idea to declare this function
272  * as taking size_t ... but the underlying backend function only accepts a
273  * signed int32 length. So throw error if the given value overflows
274  * int32.
275  */
276  if (len > (size_t) INT_MAX)
277  {
279  libpq_gettext("argument of lo_read exceeds integer range\n"));
280  return -1;
281  }
282 
283  argv[0].isint = 1;
284  argv[0].len = 4;
285  argv[0].u.integer = fd;
286 
287  argv[1].isint = 1;
288  argv[1].len = 4;
289  argv[1].u.integer = (int) len;
290 
291  res = PQfn(conn, conn->lobjfuncs->fn_lo_read,
292  (void *) buf, &result_len, 0, argv, 2);
293  if (PQresultStatus(res) == PGRES_COMMAND_OK)
294  {
295  PQclear(res);
296  return result_len;
297  }
298  else
299  {
300  PQclear(res);
301  return -1;
302  }
303 }
void printfPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:237
PGresult * PQfn(PGconn *conn, int fnid, int *result_buf, int *result_len, int result_is_int, const PQArgBlock *args, int nargs)
Definition: fe-exec.c:2653
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:2693
Oid fn_lo_read
Definition: libpq-int.h:281
static char * buf
Definition: pg_test_fsync.c:68
PQExpBufferData errorMessage
Definition: libpq-int.h:509
void PQclear(PGresult *res)
Definition: fe-exec.c:695
union PQArgBlock::@163 u
int isint
Definition: libpq-fe.h:226
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:436
#define libpq_gettext(x)
Definition: libpq-int.h:788
int integer
Definition: libpq-fe.h:230
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:876

◆ lo_tell()

int lo_tell ( PGconn conn,
int  fd 
)

Definition at line 548 of file fe-lobj.c.

References fd(), pgLobjfuncs::fn_lo_tell, PQArgBlock::integer, PQArgBlock::isint, PQArgBlock::len, lo_initialize(), pg_conn::lobjfuncs, PGRES_COMMAND_OK, PQclear(), PQfn(), PQresultStatus(), and PQArgBlock::u.

549 {
550  int retval;
551  PQArgBlock argv[1];
552  PGresult *res;
553  int result_len;
554 
555  if (conn == NULL || conn->lobjfuncs == NULL)
556  {
557  if (lo_initialize(conn) < 0)
558  return -1;
559  }
560 
561  argv[0].isint = 1;
562  argv[0].len = 4;
563  argv[0].u.integer = fd;
564 
565  res = PQfn(conn, conn->lobjfuncs->fn_lo_tell,
566  &retval, &result_len, 1, argv, 1);
567  if (PQresultStatus(res) == PGRES_COMMAND_OK)
568  {
569  PQclear(res);
570  return retval;
571  }
572  else
573  {
574  PQclear(res);
575  return -1;
576  }
577 }
PGresult * PQfn(PGconn *conn, int fnid, int *result_buf, int *result_len, int result_is_int, const PQArgBlock *args, int nargs)
Definition: fe-exec.c:2653
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:2693
Oid fn_lo_tell
Definition: libpq-int.h:277
void PQclear(PGresult *res)
Definition: fe-exec.c:695
union PQArgBlock::@163 u
int isint
Definition: libpq-fe.h:226
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:436
int integer
Definition: libpq-fe.h:230
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:876

◆ lo_tell64()

pg_int64 lo_tell64 ( PGconn conn,
int  fd 
)

Definition at line 584 of file fe-lobj.c.

References pg_conn::errorMessage, fd(), pgLobjfuncs::fn_lo_tell64, PQArgBlock::integer, PQArgBlock::isint, PQArgBlock::len, libpq_gettext, lo_initialize(), lo_ntoh64(), pg_conn::lobjfuncs, PGRES_COMMAND_OK, PQclear(), PQfn(), PQresultStatus(), printfPQExpBuffer(), and PQArgBlock::u.

Referenced by pickout().

585 {
586  pg_int64 retval;
587  PQArgBlock argv[1];
588  PGresult *res;
589  int result_len;
590 
591  if (conn == NULL || conn->lobjfuncs == NULL)
592  {
593  if (lo_initialize(conn) < 0)
594  return -1;
595  }
596 
597  if (conn->lobjfuncs->fn_lo_tell64 == 0)
598  {
600  libpq_gettext("cannot determine OID of function lo_tell64\n"));
601  return -1;
602  }
603 
604  argv[0].isint = 1;
605  argv[0].len = 4;
606  argv[0].u.integer = fd;
607 
608  res = PQfn(conn, conn->lobjfuncs->fn_lo_tell64,
609  (void *) &retval, &result_len, 0, argv, 1);
610  if (PQresultStatus(res) == PGRES_COMMAND_OK && result_len == 8)
611  {
612  PQclear(res);
613  return lo_ntoh64(retval);
614  }
615  else
616  {
617  PQclear(res);
618  return -1;
619  }
620 }
void printfPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:237
PGresult * PQfn(PGconn *conn, int fnid, int *result_buf, int *result_len, int result_is_int, const PQArgBlock *args, int nargs)
Definition: fe-exec.c:2653
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:2693
PG_INT64_TYPE pg_int64
Definition: postgres_ext.h:47
Oid fn_lo_tell64
Definition: libpq-int.h:278
PQExpBufferData errorMessage
Definition: libpq-int.h:509
void PQclear(PGresult *res)
Definition: fe-exec.c:695
union PQArgBlock::@163 u
int isint
Definition: libpq-fe.h:226
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:436
#define libpq_gettext(x)
Definition: libpq-int.h:788
int integer
Definition: libpq-fe.h:230
static pg_int64 lo_ntoh64(pg_int64 net64)
Definition: fe-lobj.c:1086
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:876

◆ lo_truncate()

int lo_truncate ( PGconn conn,
int  fd,
size_t  len 
)

Definition at line 137 of file fe-lobj.c.

References pg_conn::errorMessage, fd(), pgLobjfuncs::fn_lo_truncate, PQArgBlock::integer, PQArgBlock::isint, PQArgBlock::len, libpq_gettext, lo_initialize(), pg_conn::lobjfuncs, PGRES_COMMAND_OK, PQclear(), PQfn(), PQresultStatus(), printfPQExpBuffer(), and PQArgBlock::u.

138 {
139  PQArgBlock argv[2];
140  PGresult *res;
141  int retval;
142  int result_len;
143 
144  if (conn == NULL || conn->lobjfuncs == NULL)
145  {
146  if (lo_initialize(conn) < 0)
147  return -1;
148  }
149 
150  /* Must check this on-the-fly because it's not there pre-8.3 */
151  if (conn->lobjfuncs->fn_lo_truncate == 0)
152  {
154  libpq_gettext("cannot determine OID of function lo_truncate\n"));
155  return -1;
156  }
157 
158  /*
159  * Long ago, somebody thought it'd be a good idea to declare this function
160  * as taking size_t ... but the underlying backend function only accepts a
161  * signed int32 length. So throw error if the given value overflows
162  * int32. (A possible alternative is to automatically redirect the call
163  * to lo_truncate64; but if the caller wanted to rely on that backend
164  * function being available, he could have called lo_truncate64 for
165  * himself.)
166  */
167  if (len > (size_t) INT_MAX)
168  {
170  libpq_gettext("argument of lo_truncate exceeds integer range\n"));
171  return -1;
172  }
173 
174  argv[0].isint = 1;
175  argv[0].len = 4;
176  argv[0].u.integer = fd;
177 
178  argv[1].isint = 1;
179  argv[1].len = 4;
180  argv[1].u.integer = (int) len;
181 
182  res = PQfn(conn, conn->lobjfuncs->fn_lo_truncate,
183  &retval, &result_len, 1, argv, 2);
184 
185  if (PQresultStatus(res) == PGRES_COMMAND_OK)
186  {
187  PQclear(res);
188  return retval;
189  }
190  else
191  {
192  PQclear(res);
193  return -1;
194  }
195 }
void printfPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:237
PGresult * PQfn(PGconn *conn, int fnid, int *result_buf, int *result_len, int result_is_int, const PQArgBlock *args, int nargs)
Definition: fe-exec.c:2653
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:2693
Oid fn_lo_truncate
Definition: libpq-int.h:279
PQExpBufferData errorMessage
Definition: libpq-int.h:509
void PQclear(PGresult *res)
Definition: fe-exec.c:695
union PQArgBlock::@163 u
int isint
Definition: libpq-fe.h:226
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:436
#define libpq_gettext(x)
Definition: libpq-int.h:788
int integer
Definition: libpq-fe.h:230
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:876

◆ lo_truncate64()

int lo_truncate64 ( PGconn conn,
int  fd,
pg_int64  len 
)

Definition at line 205 of file fe-lobj.c.

References pg_conn::errorMessage, fd(), pgLobjfuncs::fn_lo_truncate64, PQArgBlock::integer, PQArgBlock::isint, PQArgBlock::len, libpq_gettext, lo_hton64(), lo_initialize(), pg_conn::lobjfuncs, PGRES_COMMAND_OK, PQclear(), PQfn(), PQresultStatus(), printfPQExpBuffer(), PQArgBlock::ptr, and PQArgBlock::u.

Referenced by my_truncate().

206 {
207  PQArgBlock argv[2];
208  PGresult *res;
209  int retval;
210  int result_len;
211 
212  if (conn == NULL || conn->lobjfuncs == NULL)
213  {
214  if (lo_initialize(conn) < 0)
215  return -1;
216  }
217 
218  if (conn->lobjfuncs->fn_lo_truncate64 == 0)
219  {
221  libpq_gettext("cannot determine OID of function lo_truncate64\n"));
222  return -1;
223  }
224 
225  argv[0].isint = 1;
226  argv[0].len = 4;
227  argv[0].u.integer = fd;
228 
229  len = lo_hton64(len);
230  argv[1].isint = 0;
231  argv[1].len = 8;
232  argv[1].u.ptr = (int *) &len;
233 
234  res = PQfn(conn, conn->lobjfuncs->fn_lo_truncate64,
235  &retval, &result_len, 1, argv, 2);
236 
237  if (PQresultStatus(res) == PGRES_COMMAND_OK)
238  {
239  PQclear(res);
240  return retval;
241  }
242  else
243  {
244  PQclear(res);
245  return -1;
246  }
247 }
void printfPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:237
PGresult * PQfn(PGconn *conn, int fnid, int *result_buf, int *result_len, int result_is_int, const PQArgBlock *args, int nargs)
Definition: fe-exec.c:2653
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:2693
static pg_int64 lo_hton64(pg_int64 host64)
Definition: fe-lobj.c:1061
Oid fn_lo_truncate64
Definition: libpq-int.h:280
PQExpBufferData errorMessage
Definition: libpq-int.h:509
void PQclear(PGresult *res)
Definition: fe-exec.c:695
union PQArgBlock::@163 u
int isint
Definition: libpq-fe.h:226
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:436
int * ptr
Definition: libpq-fe.h:229
#define libpq_gettext(x)
Definition: libpq-int.h:788
int integer
Definition: libpq-fe.h:230
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:876

◆ lo_unlink()

int lo_unlink ( PGconn conn,
Oid  lobjId 
)

Definition at line 628 of file fe-lobj.c.

References pgLobjfuncs::fn_lo_unlink, PQArgBlock::integer, PQArgBlock::isint, PQArgBlock::len, lo_initialize(), pg_conn::lobjfuncs, PGRES_COMMAND_OK, PQclear(), PQfn(), PQresultStatus(), and PQArgBlock::u.

Referenced by do_lo_unlink(), and vacuumlo().

629 {
630  PQArgBlock argv[1];
631  PGresult *res;
632  int result_len;
633  int retval;
634 
635  if (conn == NULL || conn->lobjfuncs == NULL)
636  {
637  if (lo_initialize(conn) < 0)
638  return -1;
639  }
640 
641  argv[0].isint = 1;
642  argv[0].len = 4;
643  argv[0].u.integer = lobjId;
644 
645  res = PQfn(conn, conn->lobjfuncs->fn_lo_unlink,
646  &retval, &result_len, 1, argv, 1);
647  if (PQresultStatus(res) == PGRES_COMMAND_OK)
648  {
649  PQclear(res);
650  return retval;
651  }
652  else
653  {
654  PQclear(res);
655  return -1;
656  }
657 }
PGresult * PQfn(PGconn *conn, int fnid, int *result_buf, int *result_len, int result_is_int, const PQArgBlock *args, int nargs)
Definition: fe-exec.c:2653
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:2693
void PQclear(PGresult *res)
Definition: fe-exec.c:695
union PQArgBlock::@163 u
Oid fn_lo_unlink
Definition: libpq-int.h:274
int isint
Definition: libpq-fe.h:226
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:436
int integer
Definition: libpq-fe.h:230
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:876

◆ lo_write()

int lo_write ( PGconn conn,
int  fd,
const char *  buf,
size_t  len 
)

Definition at line 312 of file fe-lobj.c.

References pg_conn::errorMessage, fd(), pgLobjfuncs::fn_lo_write, PQArgBlock::integer, PQArgBlock::isint, PQArgBlock::len, libpq_gettext, lo_initialize(), pg_conn::lobjfuncs, PGRES_COMMAND_OK, PQclear(), PQfn(), PQresultStatus(), printfPQExpBuffer(), PQArgBlock::ptr, PQArgBlock::u, and unconstify.

Referenced by lo_import_internal().

313 {
314  PQArgBlock argv[2];
315  PGresult *res;
316  int result_len;
317  int retval;
318 
319  if (conn == NULL || conn->lobjfuncs == NULL)
320  {
321  if (lo_initialize(conn) < 0)
322  return -1;
323  }
324 
325  /*
326  * Long ago, somebody thought it'd be a good idea to declare this function
327  * as taking size_t ... but the underlying backend function only accepts a
328  * signed int32 length. So throw error if the given value overflows
329  * int32.
330  */
331  if (len > (size_t) INT_MAX)
332  {
334  libpq_gettext("argument of lo_write exceeds integer range\n"));
335  return -1;
336  }
337 
338  argv[0].isint = 1;
339  argv[0].len = 4;
340  argv[0].u.integer = fd;
341 
342  argv[1].isint = 0;
343  argv[1].len = (int) len;
344  argv[1].u.ptr = (int *) unconstify(char *, buf);
345 
346  res = PQfn(conn, conn->lobjfuncs->fn_lo_write,
347  &retval, &result_len, 1, argv, 2);
348  if (PQresultStatus(res) == PGRES_COMMAND_OK)
349  {
350  PQclear(res);
351  return retval;
352  }
353  else
354  {
355  PQclear(res);
356  return -1;
357  }
358 }
void printfPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:237
Oid fn_lo_write
Definition: libpq-int.h:282
PGresult * PQfn(PGconn *conn, int fnid, int *result_buf, int *result_len, int result_is_int, const PQArgBlock *args, int nargs)
Definition: fe-exec.c:2653
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:2693
static char * buf
Definition: pg_test_fsync.c:68
#define unconstify(underlying_type, expr)
Definition: c.h:1163
PQExpBufferData errorMessage
Definition: libpq-int.h:509
void PQclear(PGresult *res)
Definition: fe-exec.c:695
union PQArgBlock::@163 u
int isint
Definition: libpq-fe.h:226
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:436
int * ptr
Definition: libpq-fe.h:229
#define libpq_gettext(x)
Definition: libpq-int.h:788
int integer
Definition: libpq-fe.h:230
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:876

◆ pg_char_to_encoding()

int pg_char_to_encoding ( const char *  name)

Definition at line 551 of file encnames.c.

References clean_encoding_name(), ereport, errcode(), errmsg(), ERROR, fprintf, sort-test::key, lengthof, NAMEDATALEN, and pg_encname_tbl.

Referenced by CreateConversionCommand(), length_in_encoding(), main(), PG_char_to_encoding(), pg_convert(), pg_get_utf8_id(), pg_valid_client_encoding(), pg_valid_server_encoding(), PQenv2encoding(), pqSaveParameterStatus(), ProcessCopyOptions(), processEncodingEntry(), and to_ascii_encname().

552 {
553  unsigned int nel = lengthof(pg_encname_tbl);
554  const pg_encname *base = pg_encname_tbl,
555  *last = base + nel - 1,
556  *position;
557  int result;
558  char buff[NAMEDATALEN],
559  *key;
560 
561  if (name == NULL || *name == '\0')
562  return -1;
563 
564  if (strlen(name) >= NAMEDATALEN)
565  {
566 #ifdef FRONTEND
567  fprintf(stderr, "encoding name too long\n");
568  return -1;
569 #else
570  ereport(ERROR,
571  (errcode(ERRCODE_NAME_TOO_LONG),
572  errmsg("encoding name too long")));
573 #endif
574  }
575  key = clean_encoding_name(name, buff);
576 
577  while (last >= base)
578  {
579  position = base + ((last - base) >> 1);
580  result = key[0] - position->name[0];
581 
582  if (result == 0)
583  {
584  result = strcmp(key, position->name);
585  if (result == 0)
586  return position->encoding;
587  }
588  if (result < 0)
589  last = position - 1;
590  else
591  base = position + 1;
592  }
593  return -1;
594 }
int errcode(int sqlerrcode)
Definition: elog.c:570
#define lengthof(array)
Definition: c.h:662
#define fprintf
Definition: port.h:196
#define NAMEDATALEN
#define ERROR
Definition: elog.h:43
static const pg_encname pg_encname_tbl[]
Definition: encnames.c:38
#define ereport(elevel, rest)
Definition: elog.h:141
const char * name
Definition: encode.c:521
int errmsg(const char *fmt,...)
Definition: elog.c:784
static char * clean_encoding_name(const char *key, char *newkey)
Definition: encnames.c:525

◆ pg_encoding_to_char()

◆ pg_valid_server_encoding_id()

int pg_valid_server_encoding_id ( int  encoding)

Definition at line 515 of file encnames.c.

References PG_VALID_BE_ENCODING.

Referenced by setup_locale_encoding().

516 {
518 }
#define PG_VALID_BE_ENCODING(_enc)
Definition: pg_wchar.h:295
int32 encoding
Definition: pg_database.h:41

◆ PQbackendPID()

int PQbackendPID ( const PGconn conn)

Definition at line 6587 of file fe-connect.c.

References pg_conn::be_pid, CONNECTION_OK, and pg_conn::status.

Referenced by get_prompt(), main(), and StartLogStreamer().

6588 {
6589  if (!conn || conn->status != CONNECTION_OK)
6590  return 0;
6591  return conn->be_pid;
6592 }
ConnStatusType status
Definition: libpq-int.h:383
int be_pid
Definition: libpq-int.h:429

◆ PQbinaryTuples()

int PQbinaryTuples ( const PGresult res)

Definition at line 2786 of file fe-exec.c.

References pg_result::binary.

Referenced by ProcessResult().

2787 {
2788  if (!res)
2789  return 0;
2790  return res->binary;
2791 }
int binary
Definition: libpq-int.h:179

◆ PQcancel()

int PQcancel ( PGcancel cancel,
char *  errbuf,
int  errbufsize 
)

Definition at line 4339 of file fe-connect.c.

References pg_cancel::be_key, pg_cancel::be_pid, internal_cancel(), pg_cancel::raddr, and strlcpy().

Referenced by dblink_cancel_query(), disconnectDatabase(), DisconnectDatabase(), handle_sigint(), pgfdw_cancel_query(), setup_cancel_handler(), ShutdownWorkersHard(), sigTermHandler(), and try_complete_step().

4340 {
4341  if (!cancel)
4342  {
4343  strlcpy(errbuf, "PQcancel() -- no cancel object supplied", errbufsize);
4344  return false;
4345  }
4346 
4347  return internal_cancel(&cancel->raddr, cancel->be_pid, cancel->be_key,
4348  errbuf, errbufsize);
4349 }
static int internal_cancel(SockAddr *raddr, int be_pid, int be_key, char *errbuf, int errbufsize)
Definition: fe-connect.c:4235
int be_pid
Definition: libpq-int.h:522
int be_key
Definition: libpq-int.h:523
size_t strlcpy(char *dst, const char *src, size_t siz)
Definition: strlcpy.c:45
SockAddr raddr
Definition: libpq-int.h:521

◆ PQclear()

void PQclear ( PGresult res)

Definition at line 695 of file fe-exec.c.

References pg_result::attDescs, pg_result::curBlock, pg_result::errFields, pg_result::events, free, i, PGEvent::name, pg_result::nEvents, pgresult_data::next, pg_result::paramDescs, PGEvent::passThrough, PGEVT_RESULTDESTROY, PGEvent::proc, PGEventResultDestroy::result, PGEvent::resultInitialized, and pg_result::tuples.

Referenced by _check_database_version(), _doSetSessionAuth(), _selectOutputSchema(), _selectTableAccessMethod(), _selectTablespace(), add_tablespace_footer(), appendQualifiedRelation(), BaseBackup(), binary_upgrade_set_pg_class_oids(), binary_upgrade_set_type_oids_by_rel_oid(), binary_upgrade_set_type_oids_by_type_oid(), buildMatViewRefreshDependencies(), buildShSecLabels(), check_for_isn_and_int8_passing_mismatch(), check_for_jsonb_9_4_usage(), check_for_pg_role_prefix(), check_for_prepared_transactions(), check_for_reg_data_type_usage(), check_for_tables_with_oids(), check_is_install_user(), check_loadable_libraries(), check_prepare_conn(), check_proper_datallowconn(), ClearOrSaveResult(), close_cursor(), cluster_all_databases(), connectDatabase(), ConnectDatabase(), connectToServer(), convertTSFunction(), create_cursor(), CreateReplicationSlot(), createViewAsClause(), dblink_close(), dblink_exec(), dblink_fetch(), dblink_open(), dblink_res_error(), deallocate_one(), describeAccessMethods(), describeAggregates(), describeFunctions(), describeOneTableDetails(), describeOneTSConfig(), describeOneTSParser(), describeOperators(), describePublications(), DescribeQuery(), describeRoles(), describeSubscriptions(), describeTableDetails(), describeTablespaces(), describeTypes(), descriptor_free(), do_lo_import(), do_lo_list(), do_sql_command(), dropDBs(), DropReplicationSlot(), dropRoles(), dropTablespaces(), dumpAgg(), dumpBaseType(), dumpBlobs(), dumpCollation(), dumpCompositeType(), dumpCompositeTypeColComments(), dumpConversion(), dumpDatabase(), dumpDatabaseConfig(), dumpDatabases(), dumpDomain(), dumpEnumType(), dumpFunc(), dumpGroups(), dumpOpclass(), dumpOpfamily(), dumpOpr(), dumpRangeType(), dumpRoleMembership(), dumpRoles(), dumpRule(), dumpSearchPath(), dumpSequence(), dumpSequenceData(), dumpStatisticsExt(), dumpTable(), dumpTableData_copy(), dumpTableData_insert(), dumpTableSchema(), dumpTablespaces(), dumpTSConfig(), dumpTSDictionary(), dumpUserConfig(), dumpUserMappings(), ecpg_autostart_transaction(), ecpg_check_PQresult(), ecpg_is_type_an_array(), ecpg_process_output(), ECPGdescribe(), ECPGsetcommit(), ECPGtrans(), EndDBCopyMode(), exec_command_password(), ExecQueryUsingCursor(), execute_foreign_modify(), executeCommand(), executeMaintenanceCommand(), executeQueryOrDie(), ExecuteSqlCommand(), ExecuteSqlStatement(), executeStatement(), expand_dbname_patterns(), expand_schema_name_patterns(), expand_table_name_patterns(), fail_lo_xact(), fetch_more_data(), findLastBuiltinOid_V71(), finish_foreign_modify(), finish_lo_xact(), get_create_object_cmd(), get_db_infos(), get_language_name(), get_loadable_libraries(), get_parallel_object_list(), get_rel_infos(), get_remote_estimate(), get_returning_data(), get_synchronized_snapshot(), get_tablespace_paths(), getAccessMethods(), getAggregates(), getBlobs(), getCasts(), getCollations(), GetConnection(), getConstraints(), getConversions(), getCopyStart(), getDefaultACLs(), getDependencies(), getDomainConstraints(), getEventTriggers(), getExtendedStatistics(), getExtensionMembership(), getExtensions(), getForeignDataWrappers(), getForeignServers(), getFormattedTypeName(), getFuncs(), getIndexes(), getInherits(), getNamespaces(), getOpclasses(), getOperators(), getOpfamilies(), getParamDescriptions(), getPolicies(), getProcLangs(), getPublications(), getPublicationTables(), getRowDescriptions(), getRules(), getSubscriptions(), getTableAttrs(), getTables(), getTransforms(), getTriggers(), getTSConfigurations(), getTSDictionaries(), getTSParsers(), getTSTemplates(), getTypes(), handleCopyIn(), HandleEndOfCopyStream(), initGenerateData(), libpq_executeFileMap(), libpqConnect(), libpqGetFile(), libpqProcessFileList(), libpqrcv_create_slot(), libpqrcv_endstreaming(), libpqrcv_exec(), libpqrcv_identify_system(), libpqrcv_PQexec(), libpqrcv_readtimelinehistoryfile(), libpqrcv_receive(), libpqrcv_startstreaming(), listAllDbs(), listCasts(), listCollations(), listConversions(), listDbRoleSettings(), listDefaultACLs(), listDomains(), listEventTriggers(), listExtensionContents(), listExtensions(), listForeignDataWrappers(), listForeignServers(), listForeignTables(), listLanguages(), listOneExtensionContents(), listPartitionedTables(), listPublications(), listSchemas(), listTables(), listTSConfigs(), listTSConfigsVerbose(), listTSDictionaries(), listTSParsers(), listTSParsersVerbose(), listTSTemplates(), listUserMappings(), lo_close(), lo_creat(), lo_create(), lo_initialize(), lo_lseek(), lo_lseek64(), lo_open(), lo_read(), lo_tell(), lo_tell64(), lo_truncate(), lo_truncate64(), lo_unlink(), lo_write(), lockTableForWorker(), lookup_object_oid(), main(), materializeResult(), new_9_0_populate_pg_largeobject_metadata(), objectDescription(), old_9_3_check_for_line_data_type_usage(), old_9_6_check_for_unknown_data_type_usage(), old_9_6_invalidate_hash_indexes(), permissionsList(), pg_attribute_noreturn(), pgfdw_cancel_query(), pgfdw_exec_cleanup_query(), pgfdw_get_cleanup_result(), pgfdw_get_result(), pgfdw_report_error(), pgfdw_xact_callback(), postgresAcquireSampleRowsFunc(), postgresAnalyzeForeignTable(), postgresEndDirectModify(), postgresImportForeignSchema(), postgresReScanForeignScan(), pqClearAsyncResult(), PQconnectPoll(), PQcopyResult(), PQencryptPasswordConn(), pqEndcopy2(), pqEndcopy3(), PQexecFinish(), PQexecStart(), pqGetErrorNotice2(), pqGetErrorNotice3(), pqInternalNotice(), PQmakeEmptyPGresult(), pqRowProcessor(), PQsetClientEncoding(), pqSetenvPoll(), prepare_common(), prepare_foreign_modify(), processExtensionTables(), processQueryResult(), ProcessResult(), PSQLexecWatch(), readCommandResponse(), receiveFileChunks(), ReceiveXlogStream(), ReconnectToServer(), reindex_all_databases(), RetrieveDataDirCreatePerm(), RetrieveWalSegSize(), run_permutation(), run_simple_command(), run_simple_query(), RunIdentifySystem(), sendCommand(), SendQuery(), set_frozenxids(), setup_connection(), sql_conn(), sql_exec(), start_lo_xact(), store_returning_result(), storeQueryResult(), StreamLogicalLog(), try_complete_step(), tryExecuteStatement(), vacuum_all_databases(), vacuum_one_database(), and vacuumlo().

696 {
697  PGresult_data *block;
698  int i;
699 
700  if (!res)
701  return;
702 
703  for (i = 0; i < res->nEvents; i++)
704  {
705  /* only send DESTROY to successfully-initialized event procs */
706  if (res->events[i].resultInitialized)
707  {
709 
710  evt.result = res;
711  (void) res->events[i].proc(PGEVT_RESULTDESTROY, &evt,
712  res->events[i].passThrough);
713  }
714  free(res->events[i].name);
715  }
716 
717  if (res->events)
718  free(res->events);
719 
720  /* Free all the subsidiary blocks */
721  while ((block = res->curBlock) != NULL)
722  {
723  res->curBlock = block->next;
724  free(block);
725  }
726 
727  /* Free the top-level tuple pointer array */
728  if (res->tuples)
729  free(res->tuples);
730 
731  /* zero out the pointer fields to catch programming errors */
732  res->attDescs = NULL;
733  res->tuples = NULL;
734  res->paramDescs = NULL;
735  res->errFields = NULL;
736  res->events = NULL;
737  res->nEvents = 0;
738  /* res->curBlock was zeroed out earlier */
739 
740  /* Free the PGresult structure itself */
741  free(res);
742 }
PGMessageField * errFields
Definition: libpq-int.h:197
bool resultInitialized
Definition: libpq-int.h:164
PGresult_data * next
Definition: libpq-int.h:105
int nEvents
Definition: libpq-int.h:188
PGresAttDesc * attDescs
Definition: libpq-int.h:171
PGresAttValue ** tuples
Definition: libpq-int.h:172
PGresult_data * curBlock
Definition: libpq-int.h:208
#define free(a)
Definition: header.h:65
PGresParamDesc * paramDescs
Definition: libpq-int.h:176
PGEventProc proc
Definition: libpq-int.h:160
int i
void * passThrough
Definition: libpq-int.h:162
PGEvent * events
Definition: libpq-int.h:187
char * name
Definition: libpq-int.h:161

◆ PQclientEncoding()

int PQclientEncoding ( const PGconn conn)

◆ PQcmdStatus()

char* PQcmdStatus ( PGresult res)

Definition at line 3041 of file fe-exec.c.

References pg_result::cmdStatus.

Referenced by dblink_exec(), ecpg_process_output(), materializeResult(), PrintQueryResults(), PrintQueryStatus(), PSQLexecWatch(), and SendQuery().

3042 {
3043  if (!res)
3044  return NULL;
3045  return res->cmdStatus;
3046 }
char cmdStatus[CMDSTATUS_LEN]
Definition: libpq-int.h:178

◆ PQcmdTuples()

char* PQcmdTuples ( PGresult res)

Definition at line 3111 of file fe-exec.c.

References pg_result::cmdStatus, pg_result::noticeHooks, and pqInternalNotice().

Referenced by ecpg_process_output(), execute_dml_stmt(), execute_foreign_modify(), and SetResultVariables().

3112 {
3113  char *p,
3114  *c;
3115 
3116  if (!res)
3117  return "";
3118 
3119  if (strncmp(res->cmdStatus, "INSERT ", 7) == 0)
3120  {
3121  p = res->cmdStatus + 7;
3122  /* INSERT: skip oid and space */
3123  while (*p && *p != ' ')
3124  p++;
3125  if (*p == 0)
3126  goto interpret_error; /* no space? */
3127  p++;
3128  }
3129  else if (strncmp(res->cmdStatus, "SELECT ", 7) == 0 ||
3130  strncmp(res->cmdStatus, "DELETE ", 7) == 0 ||
3131  strncmp(res->cmdStatus, "UPDATE ", 7) == 0)
3132  p = res->cmdStatus + 7;
3133  else if (strncmp(res->cmdStatus, "FETCH ", 6) == 0)
3134  p = res->cmdStatus + 6;
3135  else if (strncmp(res->cmdStatus, "MOVE ", 5) == 0 ||
3136  strncmp(res->cmdStatus, "COPY ", 5) == 0)
3137  p = res->cmdStatus + 5;
3138  else
3139  return "";
3140 
3141  /* check that we have an integer (at least one digit, nothing else) */
3142  for (c = p; *c; c++)
3143  {
3144  if (!isdigit((unsigned char) *c))
3145  goto interpret_error;
3146  }
3147  if (c == p)
3148  goto interpret_error;
3149 
3150  return p;
3151 
3152 interpret_error:
3154  "could not interpret result from server: %s",
3155  res->cmdStatus);
3156  return "";
3157 }
PGNoticeHooks noticeHooks
Definition: libpq-int.h:186
char * c
void pqInternalNotice(const PGNoticeHooks *hooks, const char *fmt,...)
Definition: fe-exec.c:872
char cmdStatus[CMDSTATUS_LEN]
Definition: libpq-int.h:178

◆ PQconndefaults()

PQconninfoOption* PQconndefaults ( void  )

Definition at line 1342 of file fe-connect.c.

References conninfo_add_defaults(), conninfo_init(), initPQExpBuffer(), PQconninfoFree(), PQExpBufferDataBroken, and termPQExpBuffer().

Referenced by check_pghost_envvar(), dblink_fdw_validator(), get_connect_string(), InitPgFdwOptions(), and main().

1343 {
1344  PQExpBufferData errorBuf;
1345  PQconninfoOption *connOptions;
1346 
1347  /* We don't actually report any errors here, but callees want a buffer */
1348  initPQExpBuffer(&errorBuf);
1349  if (PQExpBufferDataBroken(errorBuf))
1350  return NULL; /* out of memory already :-( */
1351 
1352  connOptions = conninfo_init(&errorBuf);
1353  if (connOptions != NULL)
1354  {
1355  /* pass NULL errorBuf to ignore errors */
1356  if (!conninfo_add_defaults(connOptions, NULL))
1357  {
1358  PQconninfoFree(connOptions);
1359  connOptions = NULL;
1360  }
1361  }
1362 
1363  termPQExpBuffer(&errorBuf);
1364  return connOptions;
1365 }
void termPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:131
static PQconninfoOption * conninfo_init(PQExpBuffer errorMessage)
Definition: fe-connect.c:5185
void PQconninfoFree(PQconninfoOption *connOptions)
Definition: fe-connect.c:6393
#define PQExpBufferDataBroken(buf)
Definition: pqexpbuffer.h:67
static bool conninfo_add_defaults(PQconninfoOption *options, PQExpBuffer errorMessage)
Definition: fe-connect.c:5621
void initPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:92

◆ PQconnectdb()

PGconn* PQconnectdb ( const char *  conninfo)

Definition at line 669 of file fe-connect.c.

References conn, connectDBComplete(), CONNECTION_BAD, PQconnectStart(), and pg_conn::status.

Referenced by dblink_connect(), dblink_get_conn(), get_db_conn(), libpqConnect(), and main().

670 {
671  PGconn *conn = PQconnectStart(conninfo);
672 
673  if (conn && conn->status != CONNECTION_BAD)
674  (void) connectDBComplete(conn);
675 
676  return conn;
677 }
PGconn * conn
Definition: streamutil.c:56
static int connectDBComplete(PGconn *conn)
Definition: fe-connect.c:1961
PGconn * PQconnectStart(const char *conninfo)
Definition: fe-connect.c:795
ConnStatusType status
Definition: libpq-int.h:383

◆ PQconnectdbParams()

PGconn* PQconnectdbParams ( const char *const *  keywords,
const char *const *  values,
int  expand_dbname 
)

Definition at line 613 of file fe-connect.c.

References conn, connectDBComplete(), CONNECTION_BAD, PQconnectStartParams(), and pg_conn::status.

Referenced by _connectDB(), connect_pg_server(), connectDatabase(), ConnectDatabase(), do_connect(), doConnect(), ECPGconnect(), GetConnection(), main(), sql_conn(), and vacuumlo().

616 {
617  PGconn *conn = PQconnectStartParams(keywords, values, expand_dbname);
618 
619  if (conn && conn->status != CONNECTION_BAD)
620  (void) connectDBComplete(conn);
621 
622  return conn;
623 
624 }
PGconn * conn
Definition: streamutil.c:56
static int connectDBComplete(PGconn *conn)
Definition: fe-connect.c:1961
ConnStatusType status
Definition: libpq-int.h:383
static Datum values[MAXATTR]
Definition: bootstrap.c:167
PGconn * PQconnectStartParams(const char *const *keywords, const char *const *values, int expand_dbname)
Definition: fe-connect.c:716

◆ PQconnectionNeedsPassword()

int PQconnectionNeedsPassword ( const PGconn conn)

Definition at line 6595 of file fe-connect.c.

References password, pg_conn::password_needed, and PQpass().

Referenced by _connectDB(), connectDatabase(), ConnectDatabase(), do_connect(), doConnect(), GetConnection(), main(), sql_conn(), and vacuumlo().

6596 {
6597  char *password;
6598 
6599  if (!conn)
6600  return false;
6601  password = PQpass(conn);
6602  if (conn->password_needed &&
6603  (password == NULL || password[0] == '\0'))
6604  return true;
6605  else
6606  return false;
6607 }
static char password[100]
Definition: streamutil.c:55
bool password_needed
Definition: libpq-int.h:412
char * PQpass(const PGconn *conn)
Definition: fe-connect.c:6427

◆ PQconnectionUsedPassword()

int PQconnectionUsedPassword ( const PGconn conn)

Definition at line 6610 of file fe-connect.c.

References pg_conn::password_needed.

Referenced by _connectDB(), connect_pg_server(), ConnectDatabase(), and dblink_security_check().

6611 {
6612  if (!conn)
6613  return false;
6614  if (conn->password_needed)
6615  return true;
6616  else
6617  return false;
6618 }
bool password_needed
Definition: libpq-int.h:412

◆ PQconnectPoll()

PostgresPollingStatusType PQconnectPoll ( PGconn conn)

Definition at line 2139 of file fe-connect.c.

References SockAddr::addr, pg_conn::addr_cur, pg_conn::addrlist, pg_conn::addrlist_family, addrinfo::ai_addr, addrinfo::ai_addrlen, addrinfo::ai_family, addrinfo::ai_flags, addrinfo::ai_next, AI_NUMERICHOST, addrinfo::ai_socktype, appendPQExpBuffer(), appendPQExpBufferChar(), appendPQExpBufferStr(), pg_conn::appname, Assert, pg_conn::asyncStatus, AUTH_REQ_MD5, AUTH_REQ_OK, pg_conn::auth_req_received, CHT_HOST_ADDRESS, CHT_HOST_NAME, CHT_UNIX_SOCKET, connect, connectFailureMessage(), CONNECTION_AUTH_OK, CONNECTION_AWAITING_RESPONSE, CONNECTION_BAD, CONNECTION_CHECK_TARGET, CONNECTION_CHECK_WRITABLE, CONNECTION_CONSUME, CONNECTION_GSS_STARTUP, CONNECTION_MADE, CONNECTION_NEEDED, CONNECTION_OK, CONNECTION_SETENV, CONNECTION_SSL_STARTUP, CONNECTION_STARTED, connectNoDelay(), pg_conn::connhost, pg_conn::connip, PQExpBufferData::data, EINPROGRESS, EINTR, EnvironmentOptions, ERRCODE_APPNAME_UNKNOWN, pg_conn::errorMessage, EWOULDBLOCK, pg_conn::fbappname, free, gai_strerror, getHostaddr(), getpeereid(), pg_conn::gssencmode, pg_conn_host::host, pg_conn_host::hostaddr, pg_conn::inCursor, pg_conn::inEnd, pg_conn::inStart, IS_AF_UNIX, pg_conn::laddr, PQExpBufferData::len, libpq_gettext, MAXPGPATH, MemSet, pg_conn::nconnhost, NEGOTIATE_GSS_CODE, NEGOTIATE_SSL_CODE, pg_conn::next_eo, NI_MAXHOST, parse_int_param(), PG_DIAG_SQLSTATE, pg_fe_sendauth(), pg_getaddrinfo_all(), pg_GSS_have_cred_cache(), pg_hton32, PG_PROTOCOL, PG_PROTOCOL_MAJOR, pg_set_noblock(), PG_STRERROR_R_BUFLEN, PGASYNC_BUSY, PGASYNC_IDLE, PGINVALID_SOCKET, pgpassfileWarning(), PGRES_FATAL_ERROR, PGRES_POLLING_FAILED, PGRES_POLLING_OK, PGRES_POLLING_READING, PGRES_POLLING_WRITING, PGRES_TUPLES_OK, pg_conn_host::port, pqBuildStartupPacket2(), pqBuildStartupPacket3(), pqCheckInBufferSpace(), PQclear(), pqClearAsyncResult(), PQconsumeInput(), pqDropConnection(), pqDropServerData(), pqFlush(), pqGetc(), pqGetErrorNotice3(), pqGetInt(), pqGetpwuid(), PQgetResult(), pqGets_append(), PQgetvalue(), PQisBusy(), PQntuples(), pqPacketSend(), pqReadData(), PQresultErrorField(), PQresultStatus(), pqsecure_initialize(), pqsecure_open_client(), pqsecure_open_gss(), PQsendQuery(), pqSetenvPoll(), PQTRANS_IDLE, printfPQExpBuffer(), pg_conn::pversion, pg_conn::raddr, release_conn_addrinfo(), pg_conn::requirepeer, restoreErrorMessage(), pg_result::resultStatus, SockAddr::salen, saveErrorMessage(), pg_conn::send_appname, sendTerminateConn(), pg_conn::setenv_state, SETENV_STATE_CLIENT_ENCODING_SEND, setKeepalivesCount(), setKeepalivesIdle(), setKeepalivesInterval(), setTCPUserTimeout(), pg_conn::sigpipe_flag, pg_conn::sigpipe_so, snprintf, pg_conn::sock, SOCK_ERRNO, SOCK_STRERROR, socket, pg_conn::ssl_in_use, pg_conn::sslmode, pg_conn::status, STATUS_OK, strerror_r, pg_conn::sversion, pg_conn::target_session_attrs, termPQExpBuffer(), pg_conn::try_next_addr, pg_conn::try_next_host, pg_conn_host::type, UNIXSOCK_PATH, UNIXSOCK_PATH_BUFLEN, useKeepalives(), _internalPQconninfoOption::val, pg_conn::whichhost, and pg_conn::xactStatus.

Referenced by connectDBComplete(), connectDBStart(), libpqrcv_connect(), and PQresetPoll().

2140 {
2141  bool reset_connection_state_machine = false;
2142  bool need_new_connection = false;
2143  PGresult *res;
2144  char sebuf[PG_STRERROR_R_BUFLEN];
2145  int optval;
2146  PQExpBufferData savedMessage;
2147 
2148  if (conn == NULL)
2149  return PGRES_POLLING_FAILED;
2150 
2151  /* Get the new data */
2152  switch (conn->status)
2153  {
2154  /*
2155  * We really shouldn't have been polled in these two cases, but we
2156  * can handle it.
2157  */
2158  case CONNECTION_BAD:
2159  return PGRES_POLLING_FAILED;
2160  case CONNECTION_OK:
2161  return PGRES_POLLING_OK;
2162 
2163  /* These are reading states */
2165  case CONNECTION_AUTH_OK:
2166  {
2167  /* Load waiting data */
2168  int n = pqReadData(conn);
2169 
2170  if (n < 0)
2171  goto error_return;
2172  if (n == 0)
2173  return PGRES_POLLING_READING;
2174 
2175  break;
2176  }
2177 
2178  /* These are writing states, so we just proceed. */
2179  case CONNECTION_STARTED:
2180  case CONNECTION_MADE:
2181  break;
2182 
2183  /* We allow pqSetenvPoll to decide whether to proceed. */
2184  case CONNECTION_SETENV:
2185  break;
2186 
2187  /* Special cases: proceed without waiting. */
2189  case CONNECTION_NEEDED:
2191  case CONNECTION_CONSUME:
2193  break;
2194 
2195  default:
2197  libpq_gettext(
2198  "invalid connection state, "
2199  "probably indicative of memory corruption\n"
2200  ));
2201  goto error_return;
2202  }
2203 
2204 
2205 keep_going: /* We will come back to here until there is
2206  * nothing left to do. */
2207 
2208  /* Time to advance to next address, or next host if no more addresses? */
2209  if (conn->try_next_addr)
2210  {
2211  if (conn->addr_cur && conn->addr_cur->ai_next)
2212  {
2213  conn->addr_cur = conn->addr_cur->ai_next;
2214  reset_connection_state_machine = true;
2215  }
2216  else
2217  conn->try_next_host = true;
2218  conn->try_next_addr = false;
2219  }
2220 
2221  /* Time to advance to next connhost[] entry? */
2222  if (conn->try_next_host)
2223  {
2224  pg_conn_host *ch;
2225  struct addrinfo hint;
2226  int thisport;
2227  int ret;
2228  char portstr[MAXPGPATH];
2229 
2230  if (conn->whichhost + 1 >= conn->nconnhost)
2231  {
2232  /*
2233  * Oops, no more hosts. An appropriate error message is already
2234  * set up, so just set the right status.
2235  */
2236  goto error_return;
2237  }
2238  conn->whichhost++;
2239 
2240  /* Drop any address info for previous host */
2241  release_conn_addrinfo(conn);
2242 
2243  /*
2244  * Look up info for the new host. On failure, log the problem in
2245  * conn->errorMessage, then loop around to try the next host. (Note
2246  * we don't clear try_next_host until we've succeeded.)
2247  */
2248  ch = &conn->connhost[conn->whichhost];
2249 
2250  /* Initialize hint structure */
2251  MemSet(&hint, 0, sizeof(hint));
2252  hint.ai_socktype = SOCK_STREAM;
2253  conn->addrlist_family = hint.ai_family = AF_UNSPEC;
2254 
2255  /* Figure out the port number we're going to use. */
2256  if (ch->port == NULL || ch->port[0] == '\0')
2257  thisport = DEF_PGPORT;
2258  else
2259  {
2260  if (!parse_int_param(ch->port, &thisport, conn, "port"))
2261  goto error_return;
2262 
2263  if (thisport < 1 || thisport > 65535)
2264  {
2266  libpq_gettext("invalid port number: \"%s\"\n"),
2267  ch->port);
2268  goto keep_going;
2269  }
2270  }
2271  snprintf(portstr, sizeof(portstr), "%d", thisport);
2272 
2273  /* Use pg_getaddrinfo_all() to resolve the address */
2274  switch (ch->type)
2275  {
2276  case CHT_HOST_NAME:
2277  ret = pg_getaddrinfo_all(ch->host, portstr, &hint,
2278  &conn->addrlist);
2279  if (ret || !conn->addrlist)
2280  {
2282  libpq_gettext("could not translate host name \"%s\" to address: %s\n"),
2283  ch->host, gai_strerror(ret));
2284  goto keep_going;
2285  }
2286  break;
2287 
2288  case CHT_HOST_ADDRESS:
2289  hint.ai_flags = AI_NUMERICHOST;
2290  ret = pg_getaddrinfo_all(ch->hostaddr, portstr, &hint,
2291  &conn->addrlist);
2292  if (ret || !conn->addrlist)
2293  {
2295  libpq_gettext("could not parse network address \"%s\": %s\n"),
2296  ch->hostaddr, gai_strerror(ret));
2297  goto keep_going;
2298  }
2299  break;
2300 
2301  case CHT_UNIX_SOCKET:
2302 #ifdef HAVE_UNIX_SOCKETS
2303  conn->addrlist_family = hint.ai_family = AF_UNIX;
2304  UNIXSOCK_PATH(portstr, thisport, ch->host);
2305  if (strlen(portstr) >= UNIXSOCK_PATH_BUFLEN)
2306  {
2308  libpq_gettext("Unix-domain socket path \"%s\" is too long (maximum %d bytes)\n"),
2309  portstr,
2310  (int) (UNIXSOCK_PATH_BUFLEN - 1));
2311  goto keep_going;
2312  }
2313 
2314  /*
2315  * NULL hostname tells pg_getaddrinfo_all to parse the service
2316  * name as a Unix-domain socket path.
2317  */
2318  ret = pg_getaddrinfo_all(NULL, portstr, &hint,
2319  &conn->addrlist);
2320  if (ret || !conn->addrlist)
2321  {
2323  libpq_gettext("could not translate Unix-domain socket path \"%s\" to address: %s\n"),
2324  portstr, gai_strerror(ret));
2325  goto keep_going;
2326  }
2327 #else
2328  Assert(false);
2329 #endif
2330  break;
2331  }
2332 
2333  /* OK, scan this addrlist for a working server address */
2334  conn->addr_cur = conn->addrlist;
2335  reset_connection_state_machine = true;
2336  conn->try_next_host = false;
2337  }
2338 
2339  /* Reset connection state machine? */
2340  if (reset_connection_state_machine)
2341  {
2342  /*
2343  * (Re) initialize our connection control variables for a set of
2344  * connection attempts to a single server address. These variables
2345  * must persist across individual connection attempts, but we must
2346  * reset them when we start to consider a new server.
2347  */
2348  conn->pversion = PG_PROTOCOL(3, 0);
2349  conn->send_appname = true;
2350 #ifdef USE_SSL
2351  /* initialize these values based on SSL mode */
2352  conn->allow_ssl_try = (conn->sslmode[0] != 'd'); /* "disable" */
2353  conn->wait_ssl_try = (conn->sslmode[0] == 'a'); /* "allow" */
2354 #endif
2355 
2356  reset_connection_state_machine = false;
2357  need_new_connection = true;
2358  }
2359 
2360  /* Force a new connection (perhaps to the same server as before)? */
2361  if (need_new_connection)
2362  {
2363  /* Drop any existing connection */
2364  pqDropConnection(conn, true);
2365 
2366  /* Reset all state obtained from old server */
2367  pqDropServerData(conn);
2368 
2369  /* Drop any PGresult we might have, too */
2370  conn->asyncStatus = PGASYNC_IDLE;
2371  conn->xactStatus = PQTRANS_IDLE;
2372  pqClearAsyncResult(conn);
2373 
2374  /* Reset conn->status to put the state machine in the right state */
2375  conn->status = CONNECTION_NEEDED;
2376 
2377  need_new_connection = false;
2378  }
2379 
2380  /* Now try to advance the state machine for this connection */
2381  switch (conn->status)
2382  {
2383  case CONNECTION_NEEDED:
2384  {
2385  /*
2386  * Try to initiate a connection to one of the addresses
2387  * returned by pg_getaddrinfo_all(). conn->addr_cur is the
2388  * next one to try.
2389  *
2390  * The extra level of braces here is historical. It's not
2391  * worth reindenting this whole switch case to remove 'em.
2392  */
2393  {
2394  struct addrinfo *addr_cur = conn->addr_cur;
2395  char host_addr[NI_MAXHOST];
2396 
2397  /*
2398  * Advance to next possible host, if we've tried all of
2399  * the addresses for the current host.
2400  */
2401  if (addr_cur == NULL)
2402  {
2403  conn->try_next_host = true;
2404  goto keep_going;
2405  }
2406 
2407  /* Remember current address for possible error msg */
2408  memcpy(&conn->raddr.addr, addr_cur->ai_addr,
2409  addr_cur->ai_addrlen);
2410  conn->raddr.salen = addr_cur->ai_addrlen;
2411 
2412  /* set connip */
2413  if (conn->connip != NULL)
2414  {
2415  free(conn->connip);
2416  conn->connip = NULL;
2417  }
2418 
2419  getHostaddr(conn, host_addr, NI_MAXHOST);
2420  if (strlen(host_addr) > 0)
2421  conn->connip = strdup(host_addr);
2422 
2423  /*
2424  * purposely ignore strdup failure; not a big problem if
2425  * it fails anyway.
2426  */
2427 
2428  conn->sock = socket(addr_cur->ai_family, SOCK_STREAM, 0);
2429  if (conn->sock == PGINVALID_SOCKET)
2430  {
2431  /*
2432  * Silently ignore socket() failure if we have more
2433  * addresses to try; this reduces useless chatter in
2434  * cases where the address list includes both IPv4 and
2435  * IPv6 but kernel only accepts one family.
2436  */
2437  if (addr_cur->ai_next != NULL ||
2438  conn->whichhost + 1 < conn->nconnhost)
2439  {
2440  conn->try_next_addr = true;
2441  goto keep_going;
2442  }
2444  libpq_gettext("could not create socket: %s\n"),
2445  SOCK_STRERROR(SOCK_ERRNO, sebuf, sizeof(sebuf)));
2446  goto error_return;
2447  }
2448 
2449  /*
2450  * Select socket options: no delay of outgoing data for
2451  * TCP sockets, nonblock mode, close-on-exec. Try the
2452  * next address if any of this fails.
2453  */
2454  if (!IS_AF_UNIX(addr_cur->ai_family))
2455  {
2456  if (!connectNoDelay(conn))
2457  {
2458  /* error message already created */
2459  conn->try_next_addr = true;
2460  goto keep_going;
2461  }
2462  }
2463  if (!pg_set_noblock(conn->sock))
2464  {
2466  libpq_gettext("could not set socket to nonblocking mode: %s\n"),
2467  SOCK_STRERROR(SOCK_ERRNO, sebuf, sizeof(sebuf)));
2468  conn->try_next_addr = true;
2469  goto keep_going;
2470  }
2471 
2472 #ifdef F_SETFD
2473  if (fcntl(conn->sock, F_SETFD, FD_CLOEXEC) == -1)
2474  {
2476  libpq_gettext("could not set socket to close-on-exec mode: %s\n"),
2477  SOCK_STRERROR(SOCK_ERRNO, sebuf, sizeof(sebuf)));
2478  conn->try_next_addr = true;
2479  goto keep_going;
2480  }
2481 #endif /* F_SETFD */
2482 
2483  if (!IS_AF_UNIX(addr_cur->ai_family))
2484  {
2485 #ifndef WIN32
2486  int on = 1;
2487 #endif
2488  int usekeepalives = useKeepalives(conn);
2489  int err = 0;
2490 
2491  if (usekeepalives < 0)
2492  {
2494  libpq_gettext("keepalives parameter must be an integer\n"));
2495  err = 1;
2496  }
2497  else if (usekeepalives == 0)
2498  {
2499  /* Do nothing */
2500  }
2501 #ifndef WIN32
2502  else if (setsockopt(conn->sock,
2503  SOL_SOCKET, SO_KEEPALIVE,
2504  (char *) &on, sizeof(on)) < 0)
2505  {
2507  libpq_gettext("setsockopt(%s) failed: %s\n"),
2508  "SO_KEEPALIVE",
2509  SOCK_STRERROR(SOCK_ERRNO, sebuf, sizeof(sebuf)));
2510  err = 1;
2511  }
2512  else if (!setKeepalivesIdle(conn)
2513  || !setKeepalivesInterval(conn)
2514  || !setKeepalivesCount(conn))
2515  err = 1;
2516 #else /* WIN32 */
2517 #ifdef SIO_KEEPALIVE_VALS
2518  else if (!setKeepalivesWin32(conn))
2519  err = 1;
2520 #endif /* SIO_KEEPALIVE_VALS */
2521 #endif /* WIN32 */
2522  else if (!setTCPUserTimeout(conn))
2523  err = 1;
2524 
2525  if (err)
2526  {
2527  conn->try_next_addr = true;
2528  goto keep_going;
2529  }
2530  }
2531 
2532  /*----------
2533  * We have three methods of blocking SIGPIPE during
2534  * send() calls to this socket:
2535  *
2536  * - setsockopt(sock, SO_NOSIGPIPE)
2537  * - send(sock, ..., MSG_NOSIGNAL)
2538  * - setting the signal mask to SIG_IGN during send()
2539  *
2540  * The third method requires three syscalls per send,
2541  * so we prefer either of the first two, but they are
2542  * less portable. The state is tracked in the following
2543  * members of PGconn:
2544  *
2545  * conn->sigpipe_so - we have set up SO_NOSIGPIPE
2546  * conn->sigpipe_flag - we're specifying MSG_NOSIGNAL
2547  *
2548  * If we can use SO_NOSIGPIPE, then set sigpipe_so here
2549  * and we're done. Otherwise, set sigpipe_flag so that
2550  * we will try MSG_NOSIGNAL on sends. If we get an error
2551  * with MSG_NOSIGNAL, we'll clear that flag and revert to
2552  * signal masking.
2553  *----------
2554  */
2555  conn->sigpipe_so = false;
2556 #ifdef MSG_NOSIGNAL
2557  conn->sigpipe_flag = true;
2558 #else
2559  conn->sigpipe_flag = false;
2560 #endif /* MSG_NOSIGNAL */
2561 
2562 #ifdef SO_NOSIGPIPE
2563  optval = 1;
2564  if (setsockopt(conn->sock, SOL_SOCKET, SO_NOSIGPIPE,
2565  (char *) &optval, sizeof(optval)) == 0)
2566  {
2567  conn->sigpipe_so = true;
2568  conn->sigpipe_flag = false;
2569  }
2570 #endif /* SO_NOSIGPIPE */
2571 
2572  /*
2573  * Start/make connection. This should not block, since we
2574  * are in nonblock mode. If it does, well, too bad.
2575  */
2576  if (connect(conn->sock, addr_cur->ai_addr,
2577  addr_cur->ai_addrlen) < 0)
2578  {
2579  if (SOCK_ERRNO == EINPROGRESS ||
2580 #ifdef WIN32
2581  SOCK_ERRNO == EWOULDBLOCK ||
2582 #endif
2583  SOCK_ERRNO == EINTR)
2584  {
2585  /*
2586  * This is fine - we're in non-blocking mode, and
2587  * the connection is in progress. Tell caller to
2588  * wait for write-ready on socket.
2589  */
2590  conn->status = CONNECTION_STARTED;
2591  return PGRES_POLLING_WRITING;
2592  }
2593  /* otherwise, trouble */
2594  }
2595  else
2596  {
2597  /*
2598  * Hm, we're connected already --- seems the "nonblock
2599  * connection" wasn't. Advance the state machine and
2600  * go do the next stuff.
2601  */
2602  conn->status = CONNECTION_STARTED;
2603  goto keep_going;
2604  }
2605 
2606  /*
2607  * This connection failed. Add the error report to
2608  * conn->errorMessage, then try the next address if any.
2609  */
2611  conn->try_next_addr = true;
2612  goto keep_going;
2613  }
2614  }
2615 
2616  case CONNECTION_STARTED:
2617  {
2618  ACCEPT_TYPE_ARG3 optlen = sizeof(optval);
2619 
2620  /*
2621  * Write ready, since we've made it here, so the connection
2622  * has been made ... or has failed.
2623  */
2624 
2625  /*
2626  * Now check (using getsockopt) that there is not an error
2627  * state waiting for us on the socket.
2628  */
2629 
2630  if (getsockopt(conn->sock, SOL_SOCKET, SO_ERROR,
2631  (char *) &optval, &optlen) == -1)
2632  {
2634  libpq_gettext("could not get socket error status: %s\n"),
2635  SOCK_STRERROR(SOCK_ERRNO, sebuf, sizeof(sebuf)));
2636  goto error_return;
2637  }
2638  else if (optval != 0)
2639  {
2640  /*
2641  * When using a nonblocking connect, we will typically see
2642  * connect failures at this point, so provide a friendly
2643  * error message.
2644  */
2645  connectFailureMessage(conn, optval);
2646 
2647  /*
2648  * Try the next address if any, just as in the case where
2649  * connect() returned failure immediately.
2650  */
2651  conn->try_next_addr = true;
2652  goto keep_going;
2653  }
2654 
2655  /* Fill in the client address */
2656  conn->laddr.salen = sizeof(conn->laddr.addr);
2657  if (getsockname(conn->sock,
2658  (struct sockaddr *) &conn->laddr.addr,
2659  &conn->laddr.salen) < 0)
2660  {
2662  libpq_gettext("could not get client address from socket: %s\n"),
2663  SOCK_STRERROR(SOCK_ERRNO, sebuf, sizeof(sebuf)));
2664  goto error_return;
2665  }
2666 
2667  /*
2668  * Make sure we can write before advancing to next step.
2669  */
2670  conn->status = CONNECTION_MADE;
2671  return PGRES_POLLING_WRITING;
2672  }
2673 
2674  case CONNECTION_MADE:
2675  {
2676  char *startpacket;
2677  int packetlen;
2678 
2679 #ifdef HAVE_UNIX_SOCKETS
2680 
2681  /*
2682  * Implement requirepeer check, if requested and it's a
2683  * Unix-domain socket.
2684  */
2685  if (conn->requirepeer && conn->requirepeer[0] &&
2686  IS_AF_UNIX(conn->raddr.addr.ss_family))
2687  {
2688  char pwdbuf[BUFSIZ];
2689  struct passwd pass_buf;
2690  struct passwd *pass;
2691  int passerr;
2692  uid_t uid;
2693  gid_t gid;
2694 
2695  errno = 0;
2696  if (getpeereid(conn->sock, &uid, &gid) != 0)
2697  {
2698  /*
2699  * Provide special error message if getpeereid is a
2700  * stub
2701  */
2702  if (errno == ENOSYS)
2704  libpq_gettext("requirepeer parameter is not supported on this platform\n"));
2705  else
2707  libpq_gettext("could not get peer credentials: %s\n"),
2708  strerror_r(errno, sebuf, sizeof(sebuf)));
2709  goto error_return;
2710  }
2711 
2712  passerr = pqGetpwuid(uid, &pass_buf, pwdbuf, sizeof(pwdbuf), &pass);
2713  if (pass == NULL)
2714  {
2715  if (passerr != 0)
2717  libpq_gettext("could not look up local user ID %d: %s\n"),
2718  (int) uid,
2719  strerror_r(passerr, sebuf, sizeof(sebuf)));
2720  else
2722  libpq_gettext("local user with ID %d does not exist\n"),
2723  (int) uid);
2724  goto error_return;
2725  }
2726 
2727  if (strcmp(pass->pw_name, conn->requirepeer) != 0)
2728  {
2730  libpq_gettext("requirepeer specifies \"%s\", but actual peer user name is \"%s\"\n"),
2731  conn->requirepeer, pass->pw_name);
2732  goto error_return;
2733  }
2734  }
2735 #endif /* HAVE_UNIX_SOCKETS */
2736 
2737  if (IS_AF_UNIX(conn->raddr.addr.ss_family))
2738  {
2739  /* Don't request SSL or GSSAPI over Unix sockets */
2740 #ifdef USE_SSL
2741  conn->allow_ssl_try = false;
2742 #endif
2743 #ifdef ENABLE_GSS
2744  conn->try_gss = false;
2745 #endif
2746  }
2747 
2748 #ifdef ENABLE_GSS
2749 
2750  /*
2751  * If GSSAPI is enabled and we have a credential cache, try to
2752  * set it up before sending startup messages. If it's already
2753  * operating, don't try SSL and instead just build the startup
2754  * packet.
2755  */
2756  if (conn->try_gss && !conn->gctx)
2757  conn->try_gss = pg_GSS_have_cred_cache(&conn->gcred);
2758  if (conn->try_gss && !conn->gctx)
2759  {
2761 
2762  if (pqPacketSend(conn, 0, &pv, sizeof(pv)) != STATUS_OK)
2763  {
2765  libpq_gettext("could not send GSSAPI negotiation packet: %s\n"),
2766  SOCK_STRERROR(SOCK_ERRNO, sebuf, sizeof(sebuf)));
2767  goto error_return;
2768  }
2769 
2770  /* Ok, wait for response */
2772  return PGRES_POLLING_READING;
2773  }
2774  else if (!conn->gctx && conn->gssencmode[0] == 'r')
2775  {
2777  libpq_gettext("GSSAPI encryption required but was impossible (possibly no credential cache, no server support, or using a local socket)\n"));
2778  goto error_return;
2779  }
2780 #endif
2781 
2782 #ifdef USE_SSL
2783 
2784  /*
2785  * If SSL is enabled and we haven't already got it running,
2786  * request it instead of sending the startup message.
2787  */
2788  if (conn->allow_ssl_try && !conn->wait_ssl_try &&
2789  !conn->ssl_in_use)
2790  {
2791  ProtocolVersion pv;
2792 
2793  /*
2794  * Send the SSL request packet.
2795  *
2796  * Theoretically, this could block, but it really
2797  * shouldn't since we only got here if the socket is
2798  * write-ready.
2799  */
2801  if (pqPacketSend(conn, 0, &pv, sizeof(pv)) != STATUS_OK)
2802  {
2804  libpq_gettext("could not send SSL negotiation packet: %s\n"),
2805  SOCK_STRERROR(SOCK_ERRNO, sebuf, sizeof(sebuf)));
2806  goto error_return;
2807  }
2808  /* Ok, wait for response */
2810  return PGRES_POLLING_READING;
2811  }
2812 #endif /* USE_SSL */
2813 
2814  /*
2815  * Build the startup packet.
2816  */
2817  if (PG_PROTOCOL_MAJOR(conn->pversion) >= 3)
2818  startpacket = pqBuildStartupPacket3(conn, &packetlen,
2820  else
2821  startpacket = pqBuildStartupPacket2(conn, &packetlen,
2823  if (!startpacket)
2824  {
2825  /*
2826  * will not appendbuffer here, since it's likely to also
2827  * run out of memory
2828  */
2830  libpq_gettext("out of memory\n"));
2831  goto error_return;
2832  }
2833 
2834  /*
2835  * Send the startup packet.
2836  *
2837  * Theoretically, this could block, but it really shouldn't
2838  * since we only got here if the socket is write-ready.
2839  */
2840  if (pqPacketSend(conn, 0, startpacket, packetlen) != STATUS_OK)
2841  {
2843  libpq_gettext("could not send startup packet: %s\n"),
2844  SOCK_STRERROR(SOCK_ERRNO, sebuf, sizeof(sebuf)));
2845  free(startpacket);
2846  goto error_return;
2847  }
2848 
2849  free(startpacket);
2850 
2852  return PGRES_POLLING_READING;
2853  }
2854 
2855  /*
2856  * Handle SSL negotiation: wait for postmaster messages and
2857  * respond as necessary.
2858  */
2860  {
2861 #ifdef USE_SSL
2862  PostgresPollingStatusType pollres;
2863 
2864  /*
2865  * On first time through, get the postmaster's response to our
2866  * SSL negotiation packet.
2867  */
2868  if (!conn->ssl_in_use)
2869  {
2870  /*
2871  * We use pqReadData here since it has the logic to
2872  * distinguish no-data-yet from connection closure. Since
2873  * conn->ssl isn't set, a plain recv() will occur.
2874  */
2875  char SSLok;
2876  int rdresult;
2877 
2878  rdresult = pqReadData(conn);
2879  if (rdresult < 0)
2880  {
2881  /* errorMessage is already filled in */
2882  goto error_return;
2883  }
2884  if (rdresult == 0)
2885  {
2886  /* caller failed to wait for data */
2887  return PGRES_POLLING_READING;
2888  }
2889  if (pqGetc(&SSLok, conn) < 0)
2890  {
2891  /* should not happen really */
2892  return PGRES_POLLING_READING;
2893  }
2894  if (SSLok == 'S')
2895  {
2896  /* mark byte consumed */
2897  conn->inStart = conn->inCursor;
2898  /* Set up global SSL state if required */
2899  if (pqsecure_initialize(conn) != 0)
2900  goto error_return;
2901  }
2902  else if (SSLok == 'N')
2903  {
2904  /* mark byte consumed */
2905  conn->inStart = conn->inCursor;
2906  /* OK to do without SSL? */
2907  if (conn->sslmode[0] == 'r' || /* "require" */
2908  conn->sslmode[0] == 'v') /* "verify-ca" or
2909  * "verify-full" */
2910  {
2911  /* Require SSL, but server does not want it */
2913  libpq_gettext("server does not support SSL, but SSL was required\n"));
2914  goto error_return;
2915  }
2916  /* Otherwise, proceed with normal startup */
2917  conn->allow_ssl_try = false;
2918  conn->status = CONNECTION_MADE;
2919  return PGRES_POLLING_WRITING;
2920  }
2921  else if (SSLok == 'E')
2922  {
2923  /*
2924  * Server failure of some sort, such as failure to
2925  * fork a backend process. We need to process and
2926  * report the error message, which might be formatted
2927  * according to either protocol 2 or protocol 3.
2928  * Rather than duplicate the code for that, we flip
2929  * into AWAITING_RESPONSE state and let the code there
2930  * deal with it. Note we have *not* consumed the "E"
2931  * byte here.
2932  */
2934  goto keep_going;
2935  }
2936  else
2937  {
2939  libpq_gettext("received invalid response to SSL negotiation: %c\n"),
2940  SSLok);
2941  goto error_return;
2942  }
2943  }
2944 
2945  /*
2946  * Begin or continue the SSL negotiation process.
2947  */
2948  pollres = pqsecure_open_client(conn);
2949  if (pollres == PGRES_POLLING_OK)
2950  {
2951  /* SSL handshake done, ready to send startup packet */
2952  conn->status = CONNECTION_MADE;
2953  return PGRES_POLLING_WRITING;
2954  }
2955  if (pollres == PGRES_POLLING_FAILED)
2956  {
2957  /*
2958  * Failed ... if sslmode is "prefer" then do a non-SSL
2959  * retry
2960  */
2961  if (conn->sslmode[0] == 'p' /* "prefer" */
2962  && conn->allow_ssl_try /* redundant? */
2963  && !conn->wait_ssl_try) /* redundant? */
2964  {
2965  /* only retry once */
2966  conn->allow_ssl_try = false;
2967  need_new_connection = true;
2968  goto keep_going;
2969  }
2970  /* Else it's a hard failure */
2971  goto error_return;
2972  }
2973  /* Else, return POLLING_READING or POLLING_WRITING status */
2974  return pollres;
2975 #else /* !USE_SSL */
2976  /* can't get here */
2977  goto error_return;
2978 #endif /* USE_SSL */
2979  }
2980 
2982  {
2983 #ifdef ENABLE_GSS
2984  PostgresPollingStatusType pollres;
2985 
2986  /*
2987  * If we haven't yet, get the postmaster's response to our
2988  * negotiation packet
2989  */
2990  if (conn->try_gss && !conn->gctx)
2991  {
2992  char gss_ok;
2993  int rdresult = pqReadData(conn);
2994 
2995  if (rdresult < 0)
2996  /* pqReadData fills in error message */
2997  goto error_return;
2998  else if (rdresult == 0)
2999  /* caller failed to wait for data */
3000  return PGRES_POLLING_READING;
3001  if (pqGetc(&gss_ok, conn) < 0)
3002  /* shouldn't happen... */
3003  return PGRES_POLLING_READING;
3004 
3005  if (gss_ok == 'E')
3006  {
3007  /*
3008  * Server failure of some sort. Assume it's a
3009  * protocol version support failure, and let's see if
3010  * we can't recover (if it's not, we'll get a better
3011  * error message on retry). Server gets fussy if we
3012  * don't hang up the socket, though.
3013  */
3014  conn->try_gss = false;
3015  pqDropConnection(conn, true);
3016  conn->status = CONNECTION_NEEDED;
3017  goto keep_going;
3018  }
3019 
3020  /* mark byte consumed */
3021  conn->inStart = conn->inCursor;
3022 
3023  if (gss_ok == 'N')
3024  {
3025  /* Server doesn't want GSSAPI; fall back if we can */
3026  if (conn->gssencmode[0] == 'r')
3027  {
3029  libpq_gettext("server doesn't support GSSAPI encryption, but it was required\n"));
3030  goto error_return;
3031  }
3032 
3033  conn->try_gss = false;
3034  conn->status = CONNECTION_MADE;
3035  return PGRES_POLLING_WRITING;
3036  }
3037  else if (gss_ok != 'G')
3038  {
3040  libpq_gettext("received invalid response to GSSAPI negotiation: %c\n"),
3041  gss_ok);
3042  goto error_return;
3043  }
3044  }
3045 
3046  /* Begin or continue GSSAPI negotiation */
3047  pollres = pqsecure_open_gss(conn);
3048  if (pollres == PGRES_POLLING_OK)
3049  {
3050  /* All set for startup packet */
3051  conn->status = CONNECTION_MADE;
3052  return PGRES_POLLING_WRITING;
3053  }
3054  else if (pollres == PGRES_POLLING_FAILED &&
3055  conn->gssencmode[0] == 'p')
3056  {
3057  /*
3058  * We failed, but we can retry on "prefer". Have to drop
3059  * the current connection to do so, though.
3060  */
3061  conn->try_gss = false;
3062  pqDropConnection(conn, true);
3063  conn->status = CONNECTION_NEEDED;
3064  goto keep_going;
3065  }
3066  return pollres;
3067 #else /* !ENABLE_GSS */
3068  /* unreachable */
3069  goto error_return;
3070 #endif /* ENABLE_GSS */
3071  }
3072 
3073  /*
3074  * Handle authentication exchange: wait for postmaster messages
3075  * and respond as necessary.
3076  */
3078  {
3079  char beresp;
3080  int msgLength;
3081  int avail;
3082  AuthRequest areq;
3083  int res;
3084 
3085  /*
3086  * Scan the message from current point (note that if we find
3087  * the message is incomplete, we will return without advancing
3088  * inStart, and resume here next time).
3089  */
3090  conn->inCursor = conn->inStart;
3091 
3092  /* Read type byte */
3093  if (pqGetc(&beresp, conn))
3094  {
3095  /* We'll come back when there is more data */
3096  return PGRES_POLLING_READING;
3097  }
3098 
3099  /*
3100  * Validate message type: we expect only an authentication
3101  * request or an error here. Anything else probably means
3102  * it's not Postgres on the other end at all.
3103  */
3104  if (!(beresp == 'R' || beresp == 'E'))
3105  {
3107  libpq_gettext(
3108  "expected authentication request from "
3109  "server, but received %c\n"),
3110  beresp);
3111  goto error_return;
3112  }
3113 
3114  if (PG_PROTOCOL_MAJOR(conn->pversion) >= 3)
3115  {
3116  /* Read message length word */
3117  if (pqGetInt(&msgLength, 4, conn))
3118  {
3119  /* We'll come back when there is more data */
3120  return PGRES_POLLING_READING;
3121  }
3122  }
3123  else
3124  {
3125  /* Set phony message length to disable checks below */
3126  msgLength = 8;
3127  }
3128 
3129  /*
3130  * Try to validate message length before using it.
3131  * Authentication requests can't be very large, although GSS
3132  * auth requests may not be that small. Errors can be a
3133  * little larger, but not huge. If we see a large apparent
3134  * length in an error, it means we're really talking to a
3135  * pre-3.0-protocol server; cope.
3136  */
3137  if (beresp == 'R' && (msgLength < 8 || msgLength > 2000))
3138  {
3140  libpq_gettext(
3141  "expected authentication request from "
3142  "server, but received %c\n"),
3143  beresp);
3144  goto error_return;
3145  }
3146 
3147  if (beresp == 'E' && (msgLength < 8 || msgLength > 30000))
3148  {
3149  /* Handle error from a pre-3.0 server */
3150  conn->inCursor = conn->inStart + 1; /* reread data */
3151  if (pqGets_append(&conn->errorMessage, conn))
3152  {
3153  /* We'll come back when there is more data */
3154  return PGRES_POLLING_READING;
3155  }
3156  /* OK, we read the message; mark data consumed */
3157  conn->inStart = conn->inCursor;
3158 
3159  /*
3160  * The postmaster typically won't end its message with a
3161  * newline, so add one to conform to libpq conventions.
3162  */
3163  appendPQExpBufferChar(&conn->errorMessage, '\n');
3164 
3165  /*
3166  * If we tried to open the connection in 3.0 protocol,
3167  * fall back to 2.0 protocol.
3168  */
3169  if (PG_PROTOCOL_MAJOR(conn->pversion) >= 3)
3170  {
3171  conn->pversion = PG_PROTOCOL(2, 0);
3172  need_new_connection = true;
3173  goto keep_going;
3174  }
3175 
3176  goto error_return;
3177  }
3178 
3179  /*
3180  * Can't process if message body isn't all here yet.
3181  *
3182  * (In protocol 2.0 case, we are assuming messages carry at
3183  * least 4 bytes of data.)
3184  */
3185  msgLength -= 4;
3186  avail = conn->inEnd - conn->inCursor;
3187  if (avail < msgLength)
3188  {
3189  /*
3190  * Before returning, try to enlarge the input buffer if
3191  * needed to hold the whole message; see notes in
3192  * pqParseInput3.
3193  */
3194  if (pqCheckInBufferSpace(conn->inCursor + (size_t) msgLength,
3195  conn))
3196  goto error_return;
3197  /* We'll come back when there is more data */
3198  return PGRES_POLLING_READING;
3199  }
3200 
3201  /* Handle errors. */
3202  if (beresp == 'E')
3203  {
3204  if (PG_PROTOCOL_MAJOR(conn->pversion) >= 3)
3205  {
3206  if (pqGetErrorNotice3(conn, true))
3207  {
3208  /* We'll come back when there is more data */
3209  return PGRES_POLLING_READING;
3210  }
3211  }
3212  else
3213  {
3214  if (pqGets_append(&conn->errorMessage, conn))
3215  {
3216  /* We'll come back when there is more data */
3217  return PGRES_POLLING_READING;
3218  }
3219  }
3220  /* OK, we read the message; mark data consumed */
3221  conn->inStart = conn->inCursor;
3222 
3223  /* Check to see if we should mention pgpassfile */
3224  pgpassfileWarning(conn);
3225 
3226 #ifdef ENABLE_GSS
3227 
3228  /*
3229  * If gssencmode is "prefer" and we're using GSSAPI, retry
3230  * without it.
3231  */
3232  if (conn->gssenc && conn->gssencmode[0] == 'p')
3233  {
3234  OM_uint32 minor;
3235 
3236  /* postmaster expects us to drop the connection */
3237  conn->try_gss = false;
3238  conn->gssenc = false;
3239  gss_delete_sec_context(&minor, &conn->gctx, NULL);
3240  pqDropConnection(conn, true);
3241  conn->status = CONNECTION_NEEDED;
3242  goto keep_going;
3243  }
3244 #endif
3245 
3246 #ifdef USE_SSL
3247 
3248  /*
3249  * if sslmode is "allow" and we haven't tried an SSL
3250  * connection already, then retry with an SSL connection
3251  */
3252  if (conn->sslmode[0] == 'a' /* "allow" */
3253  && !conn->ssl_in_use
3254  && conn->allow_ssl_try
3255  && conn->wait_ssl_try)
3256  {
3257  /* only retry once */
3258  conn->wait_ssl_try = false;
3259  need_new_connection = true;
3260  goto keep_going;
3261  }
3262 
3263  /*
3264  * if sslmode is "prefer" and we're in an SSL connection,
3265  * then do a non-SSL retry
3266  */
3267  if (conn->sslmode[0] == 'p' /* "prefer" */
3268  && conn->ssl_in_use
3269  && conn->allow_ssl_try /* redundant? */
3270  && !conn->wait_ssl_try) /* redundant? */
3271  {
3272  /* only retry once */
3273  conn->allow_ssl_try = false;
3274  need_new_connection = true;
3275  goto keep_going;
3276  }
3277 #endif
3278 
3279  goto error_return;
3280  }
3281 
3282  /* It is an authentication request. */
3283  conn->auth_req_received = true;
3284 
3285  /* Get the type of request. */
3286  if (pqGetInt((int *) &areq, 4, conn))
3287  {
3288  /* We'll come back when there are more data */
3289  return PGRES_POLLING_READING;
3290  }
3291  msgLength -= 4;
3292 
3293  /*
3294  * Ensure the password salt is in the input buffer, if it's an
3295  * MD5 request. All the other authentication methods that
3296  * contain extra data in the authentication request are only
3297  * supported in protocol version 3, in which case we already
3298  * read the whole message above.
3299  */
3300  if (areq == AUTH_REQ_MD5 && PG_PROTOCOL_MAJOR(conn->pversion) < 3)
3301  {
3302  msgLength += 4;
3303 
3304  avail = conn->inEnd - conn->inCursor;
3305  if (avail < 4)
3306  {
3307  /*
3308  * Before returning, try to enlarge the input buffer
3309  * if needed to hold the whole message; see notes in
3310  * pqParseInput3.
3311  */
3312  if (pqCheckInBufferSpace(conn->inCursor + (size_t) 4,
3313  conn))
3314  goto error_return;
3315  /* We'll come back when there is more data */
3316  return PGRES_POLLING_READING;
3317  }
3318  }
3319 
3320  /*
3321  * Process the rest of the authentication request message, and
3322  * respond to it if necessary.
3323  *
3324  * Note that conn->pghost must be non-NULL if we are going to
3325  * avoid the Kerberos code doing a hostname look-up.
3326  */
3327  res = pg_fe_sendauth(areq, msgLength, conn);
3328  conn->errorMessage.len = strlen(conn->errorMessage.data);
3329 
3330  /* OK, we have processed the message; mark data consumed */
3331  conn->inStart = conn->inCursor;
3332 
3333  if (res != STATUS_OK)
3334  goto error_return;
3335 
3336  /*
3337  * Just make sure that any data sent by pg_fe_sendauth is
3338  * flushed out. Although this theoretically could block, it
3339  * really shouldn't since we don't send large auth responses.
3340  */
3341  if (pqFlush(conn))
3342  goto error_return;
3343 
3344  if (areq == AUTH_REQ_OK)
3345  {
3346  /* We are done with authentication exchange */
3347  conn->status = CONNECTION_AUTH_OK;
3348 
3349  /*
3350  * Set asyncStatus so that PQgetResult will think that
3351  * what comes back next is the result of a query. See
3352  * below.
3353  */
3354  conn->asyncStatus = PGASYNC_BUSY;
3355  }
3356 
3357  /* Look to see if we have more data yet. */
3358  goto keep_going;
3359  }
3360 
3361  case CONNECTION_AUTH_OK:
3362  {
3363  /*
3364  * Now we expect to hear from the backend. A ReadyForQuery
3365  * message indicates that startup is successful, but we might
3366  * also get an Error message indicating failure. (Notice
3367  * messages indicating nonfatal warnings are also allowed by
3368  * the protocol, as are ParameterStatus and BackendKeyData
3369  * messages.) Easiest way to handle this is to let
3370  * PQgetResult() read the messages. We just have to fake it
3371  * out about the state of the connection, by setting
3372  * asyncStatus = PGASYNC_BUSY (done above).
3373  */
3374 
3375  if (PQisBusy(conn))
3376  return PGRES_POLLING_READING;
3377 
3378  res = PQgetResult(conn);
3379 
3380  /*
3381  * NULL return indicating we have gone to IDLE state is
3382  * expected
3383  */
3384  if (res)
3385  {
3386  if (res->resultStatus != PGRES_FATAL_ERROR)
3388  libpq_gettext("unexpected message from server during startup\n"));
3389  else if (conn->send_appname &&
3390  (conn->appname || conn->fbappname))
3391  {
3392  /*
3393  * If we tried to send application_name, check to see
3394  * if the error is about that --- pre-9.0 servers will
3395  * reject it at this stage of the process. If so,
3396  * close the connection and retry without sending
3397  * application_name. We could possibly get a false
3398  * SQLSTATE match here and retry uselessly, but there
3399  * seems no great harm in that; we'll just get the
3400  * same error again if it's unrelated.
3401  */
3402  const char *sqlstate;
3403 
3404  sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE);
3405  if (sqlstate &&
3406  strcmp(sqlstate, ERRCODE_APPNAME_UNKNOWN) == 0)
3407  {
3408  PQclear(res);
3409  conn->send_appname = false;
3410  need_new_connection = true;
3411  goto keep_going;
3412  }
3413  }
3414 
3415  /*
3416  * if the resultStatus is FATAL, then conn->errorMessage
3417  * already has a copy of the error; needn't copy it back.
3418  * But add a newline if it's not there already, since
3419  * postmaster error messages may not have one.
3420  */
3421  if (conn->errorMessage.len <= 0 ||
3422  conn->errorMessage.data[conn->errorMessage.len - 1] != '\n')
3423  appendPQExpBufferChar(&conn->errorMessage, '\n');
3424  PQclear(res);
3425  goto error_return;
3426  }
3427 
3428  /* Fire up post-connection housekeeping if needed */
3429  if (PG_PROTOCOL_MAJOR(conn->pversion) < 3)
3430  {
3431  conn->status = CONNECTION_SETENV;
3433  conn->next_eo = EnvironmentOptions;
3434  return PGRES_POLLING_WRITING;
3435  }
3436 
3437  /* Almost there now ... */
3439  goto keep_going;
3440  }
3441 
3443  {
3444  /*
3445  * If a read-write connection is required, see if we have one.
3446  *
3447  * Servers before 7.4 lack the transaction_read_only GUC, but
3448  * by the same token they don't have any read-only mode, so we
3449  * may just skip the test in that case.
3450  */
3451  if (conn->sversion >= 70400 &&
3452  conn->target_session_attrs != NULL &&
3453  strcmp(conn->target_session_attrs, "read-write") == 0)
3454  {
3455  /*
3456  * Save existing error messages across the PQsendQuery
3457  * attempt. This is necessary because PQsendQuery is
3458  * going to reset conn->errorMessage, so we would lose
3459  * error messages related to previous hosts we have tried
3460  * and failed to connect to.
3461  */
3462  if (!saveErrorMessage(conn, &savedMessage))
3463  goto error_return;
3464 
3465  conn->status = CONNECTION_OK;
3466  if (!PQsendQuery(conn,
3467  "SHOW transaction_read_only"))
3468  {
3469  restoreErrorMessage(conn, &savedMessage);
3470  goto error_return;
3471  }
3473  restoreErrorMessage(conn, &savedMessage);
3474  return PGRES_POLLING_READING;
3475  }
3476 
3477  /* We can release the address list now. */
3478  release_conn_addrinfo(conn);
3479 
3480  /* We are open for business! */
3481  conn->status = CONNECTION_OK;
3482  return PGRES_POLLING_OK;
3483  }
3484 
3485  case CONNECTION_SETENV:
3486  {
3487  /*
3488  * Do post-connection housekeeping (only needed in protocol 2.0).
3489  *
3490  * We pretend that the connection is OK for the duration of these
3491  * queries.
3492  */
3493  conn->status = CONNECTION_OK;
3494 
3495  switch (pqSetenvPoll(conn))
3496  {
3497  case PGRES_POLLING_OK: /* Success */
3498  break;
3499 
3500  case PGRES_POLLING_READING: /* Still going */
3501  conn->status = CONNECTION_SETENV;
3502  return PGRES_POLLING_READING;
3503 
3504  case PGRES_POLLING_WRITING: /* Still going */
3505  conn->status = CONNECTION_SETENV;
3506  return PGRES_POLLING_WRITING;
3507 
3508  default:
3509  goto error_return;
3510  }
3511 
3512  /* Almost there now ... */
3514  goto keep_going;
3515  }
3516 
3517  case CONNECTION_CONSUME:
3518  {
3519  conn->status = CONNECTION_OK;
3520  if (!PQconsumeInput(conn))
3521  goto error_return;
3522 
3523  if (PQisBusy(conn))
3524  {
3525  conn->status = CONNECTION_CONSUME;
3526  return PGRES_POLLING_READING;
3527  }
3528 
3529  /*
3530  * Call PQgetResult() again to consume NULL result.
3531  */
3532  res = PQgetResult(conn);
3533  if (res != NULL)
3534  {
3535  PQclear(res);
3536  conn->status = CONNECTION_CONSUME;
3537  goto keep_going;
3538  }
3539 
3540  /* We can release the address list now. */
3541  release_conn_addrinfo(conn);
3542 
3543  /* We are open for business! */
3544  conn->status = CONNECTION_OK;
3545  return PGRES_POLLING_OK;
3546  }
3548  {
3549  const char *displayed_host;
3550  const char *displayed_port;
3551 
3552  if (!saveErrorMessage(conn, &savedMessage))
3553  goto error_return;
3554 
3555  conn->status = CONNECTION_OK;
3556  if (!PQconsumeInput(conn))
3557  {
3558  restoreErrorMessage(conn, &savedMessage);
3559  goto error_return;
3560  }
3561 
3562  if (PQisBusy(conn))
3563  {
3565  restoreErrorMessage(conn, &savedMessage);
3566  return PGRES_POLLING_READING;
3567  }
3568 
3569  res = PQgetResult(conn);
3570  if (res && (PQresultStatus(res) == PGRES_TUPLES_OK) &&
3571  PQntuples(res) == 1)
3572  {
3573  char *val;
3574 
3575  val = PQgetvalue(res, 0, 0);
3576  if (strncmp(val, "on", 2) == 0)
3577  {
3578  /* Not writable; fail this connection. */
3579  PQclear(res);
3580  restoreErrorMessage(conn, &savedMessage);
3581 
3582  /* Append error report to conn->errorMessage. */
3583  if (conn->connhost[conn->whichhost].type == CHT_HOST_ADDRESS)
3584  displayed_host = conn->connhost[conn->whichhost].hostaddr;
3585  else
3586  displayed_host = conn->connhost[conn->whichhost].host;
3587  displayed_port = conn->connhost[conn->whichhost].port;
3588  if (displayed_port == NULL || displayed_port[0] == '\0')
3589  displayed_port = DEF_PGPORT_STR;
3590 
3592  libpq_gettext("could not make a writable "
3593  "connection to server "
3594  "\"%s:%s\"\n"),
3595  displayed_host, displayed_port);
3596 
3597  /* Close connection politely. */
3598  conn->status = CONNECTION_OK;
3599  sendTerminateConn(conn);
3600 
3601  /*
3602  * Try next host if any, but we don't want to consider
3603  * additional addresses for this host.
3604  */
3605  conn->try_next_host = true;
3606  goto keep_going;
3607  }
3608 
3609  /* Session is read-write, so we're good. */
3610  PQclear(res);
3611  termPQExpBuffer(&savedMessage);
3612 
3613  /*
3614  * Finish reading any remaining messages before being
3615  * considered as ready.
3616  */
3617  conn->status = CONNECTION_CONSUME;
3618  goto keep_going;
3619  }
3620 
3621  /*
3622  * Something went wrong with "SHOW transaction_read_only". We
3623  * should try next addresses.
3624  */
3625  if (res)
3626  PQclear(res);
3627  restoreErrorMessage(conn, &savedMessage);
3628 
3629  /* Append error report to conn->errorMessage. */
3630  if (conn->connhost[conn->whichhost].type == CHT_HOST_ADDRESS)
3631  displayed_host = conn->connhost[conn->whichhost].hostaddr;
3632  else
3633  displayed_host = conn->connhost[conn->whichhost].host;
3634  displayed_port = conn->connhost[conn->whichhost].port;
3635  if (displayed_port == NULL || displayed_port[0] == '\0')
3636  displayed_port = DEF_PGPORT_STR;
3638  libpq_gettext("test \"SHOW transaction_read_only\" failed "
3639  "on server \"%s:%s\"\n"),
3640  displayed_host, displayed_port);
3641 
3642  /* Close connection politely. */
3643  conn->status = CONNECTION_OK;
3644  sendTerminateConn(conn);
3645 
3646  /* Try next address */
3647  conn->try_next_addr = true;
3648  goto keep_going;
3649  }
3650 
3651  default:
3653  libpq_gettext("invalid connection state %d, "
3654  "probably indicative of memory corruption\n"),
3655  conn->status);
3656  goto error_return;
3657  }
3658 
3659  /* Unreachable */
3660 
3661 error_return:
3662 
3663  /*
3664  * We used to close the socket at this point, but that makes it awkward
3665  * for those above us if they wish to remove this socket from their own
3666  * records (an fd_set for example). We'll just have this socket closed
3667  * when PQfinish is called (which is compulsory even after an error, since
3668  * the connection structure must be freed).
3669  */
3670  conn->status = CONNECTION_BAD;
3671  return PGRES_POLLING_FAILED;
3672 }
int pqFlush(PGconn *conn)
Definition: fe-misc.c:998
bool sigpipe_flag
Definition: libpq-int.h:414
char * gssencmode
Definition: libpq-int.h:485
#define NEGOTIATE_GSS_CODE
Definition: pqcomm.h:206
int inEnd
Definition: libpq-int.h:443
void printfPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:237
#define UNIXSOCK_PATH(path, port, sockdir)
Definition: pqcomm.h:70
int inStart
Definition: libpq-int.h:441
static void release_conn_addrinfo(PGconn *conn)
Definition: fe-connect.c:3986
struct addrinfo * addr_cur
Definition: libpq-int.h:422
char * PQgetvalue(const PGresult *res, int tup_num, int field_num)
Definition: fe-exec.c:3164
static int connectNoDelay(PGconn *conn)
Definition: fe-connect.c:1509
int pg_fe_sendauth(AuthRequest areq, int payloadlen, PGconn *conn)
Definition: fe-auth.c:789
void termPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:131
int getpeereid(int sock, uid_t *uid, gid_t *gid)
Definition: getpeereid.c:35
#define UNIXSOCK_PATH_BUFLEN
Definition: pqcomm.h:86
bool sigpipe_so
Definition: libpq-int.h:413
char * pqBuildStartupPacket2(PGconn *conn, int *packetlen, const PQEnvironmentOption *options)
void appendPQExpBufferStr(PQExpBuffer str, const char *data)
Definition: pqexpbuffer.c:369
#define AUTH_REQ_OK
Definition: pqcomm.h:165
int pqCheckInBufferSpace(size_t bytes_needed, PGconn *conn)
Definition: fe-misc.c:408
#define PG_STRERROR_R_BUFLEN
Definition: port.h:210
static void pgpassfileWarning(PGconn *conn)
Definition: fe-connect.c:6946
char * requirepeer
Definition: libpq-int.h:362
char * host
Definition: libpq-int.h:312
struct sockaddr_storage addr
Definition: pqcomm.h:64
static int setKeepalivesIdle(PGconn *conn)
Definition: fe-connect.c:1688
#define MemSet(start, val, len)
Definition: c.h:955
int pqGetInt(int *result, size_t bytes, PGconn *conn)
Definition: fe-misc.c:267
static bool saveErrorMessage(PGconn *conn, PQExpBuffer savedMessage)
Definition: fe-connect.c:2076
#define connect(s, name, namelen)
Definition: win32_port.h:444
static void sendTerminateConn(PGconn *conn)
Definition: fe-connect.c:4001
void pqDropConnection(PGconn *conn, bool flushInput)
Definition: fe-connect.c:446
#define PG_PROTOCOL_MAJOR(v)
Definition: pqcomm.h:104
#define AI_NUMERICHOST
Definition: getaddrinfo.h:73
int PQntuples(const PGresult *res)
Definition: fe-exec.c:2770
#define PG_DIAG_SQLSTATE
Definition: postgres_ext.h:57
uint32 AuthRequest
Definition: pqcomm.h:179
struct addrinfo * addrlist
Definition: libpq-int.h:421
#define AUTH_REQ_MD5
Definition: pqcomm.h:170
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:2693
pg_conn_host_type type
Definition: libpq-int.h:311
PostgresPollingStatusType pqSetenvPoll(PGconn *conn)
Definition: fe-protocol2.c:49
static void getHostaddr(PGconn *conn, char *host_addr, int host_addr_len)
Definition: fe-connect.c:1536
#define gai_strerror
Definition: getaddrinfo.h:146
int pg_getaddrinfo_all(const char *hostname, const char *servname, const struct addrinfo *hintp, struct addrinfo **result)
Definition: ip.c:57
static bool parse_int_param(const char *value, int *result, PGconn *conn, const char *context)
Definition: fe-connect.c:1661
int sversion
Definition: libpq-int.h:410
#define SOCK_STRERROR
Definition: libpq-int.h:802
int PQsendQuery(PGconn *conn, const char *query)
Definition: fe-exec.c:1235
PGAsyncStatusType asyncStatus
Definition: libpq-int.h:384
#define NI_MAXHOST
Definition: getaddrinfo.h:88
PGSetenvStatusType setenv_state
Definition: libpq-int.h:424
static int setTCPUserTimeout(PGconn *conn)
Definition: fe-connect.c:1843
static int useKeepalives(PGconn *conn)
Definition: fe-connect.c:1642
#define pg_hton32(x)
Definition: pg_bswap.h:121
#define IS_AF_UNIX(fam)
Definition: ip.h:24
#define SOCK_ERRNO
Definition: libpq-int.h:801
int pqGetErrorNotice3(PGconn *conn, bool isError)
Definition: fe-protocol3.c:875
#define MAXPGPATH
void appendPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:267
bool try_next_host
Definition: libpq-int.h:420
#define ERRCODE_APPNAME_UNKNOWN
Definition: fe-connect.c:93
char * hostaddr
Definition: libpq-int.h:313
pg_conn_host * connhost
Definition: libpq-int.h:401
int pqReadData(PGconn *conn)
Definition: fe-misc.c:629
bool ssl_in_use
Definition: libpq-int.h:467
const PQEnvironmentOption * next_eo
Definition: libpq-int.h:425
static void restoreErrorMessage(PGconn *conn, PQExpBuffer savedMessage)
Definition: fe-connect.c:2098
char * appname
Definition: libpq-int.h:343
PostgresPollingStatusType pqsecure_open_client(PGconn *conn)
Definition: fe-secure.c:183
ACCEPT_TYPE_ARG3 salen
Definition: pqcomm.h:65
char * target_session_attrs
Definition: libpq-int.h:369
static void pqDropServerData(PGconn *conn)
Definition: fe-connect.c:520
#define STATUS_OK
Definition: c.h:1089
pgsocket sock
Definition: libpq-int.h:405
uint32 ProtocolVersion
Definition: pqcomm.h:113
int pqGetc(char *result, PGconn *conn)
Definition: fe-misc.c:94
static void connectFailureMessage(PGconn *conn, int errorno)
Definition: fe-connect.c:1568
#define socket(af, type, protocol)
Definition: win32_port.h:440
SockAddr raddr
Definition: libpq-int.h:408
#define PGINVALID_SOCKET
Definition: port.h:33
int addrlist_family
Definition: libpq-int.h:423
int pqsecure_initialize(PGconn *conn)
Definition: fe-secure.c:168
int PQconsumeInput(PGconn *conn)
Definition: fe-exec.c:1705
void appendPQExpBufferChar(PQExpBuffer str, char ch)
Definition: pqexpbuffer.c:380
char * sslmode
Definition: libpq-int.h:356
PQExpBufferData errorMessage
Definition: libpq-int.h:509
bool try_next_addr
Definition: libpq-int.h:419
void PQclear(PGresult *res)
Definition: fe-exec.c:695
#define free(a)
Definition: header.h:65
char * PQresultErrorField(const PGresult *res, int fieldcode)
Definition: fe-exec.c:2755
#define Assert(condition)
Definition: c.h:732
bool pg_set_noblock(pgsocket sock)
Definition: noblock.c:25
char * connip
Definition: libpq-int.h:402
int PQisBusy(PGconn *conn)
Definition: fe-exec.c:1755
char * pqBuildStartupPacket3(PGconn *conn, int *packetlen, const PQEnvironmentOption *options)
#define strerror_r
Definition: port.h:209
ProtocolVersion pversion
Definition: libpq-int.h:409
ConnStatusType status
Definition: libpq-int.h:383
bool auth_req_received
Definition: libpq-int.h:411
int uid_t
Definition: win32_port.h:239
static int setKeepalivesInterval(PGconn *conn)
Definition: fe-connect.c:1722
SockAddr laddr
Definition: libpq-int.h:407
PostgresPollingStatusType
Definition: libpq-fe.h:74
struct addrinfo * ai_next
Definition: getaddrinfo.h:107
int pqGetpwuid(uid_t uid, struct passwd *resultbuf, char *buffer, size_t buflen, struct passwd **result)
Definition: thread.c:68
bool pg_GSS_have_cred_cache(gss_cred_id_t *cred_out)
int pqPacketSend(PGconn *conn, char pack_type, const void *buf, size_t buf_len)
Definition: fe-connect.c:4408
int gid_t
Definition: win32_port.h:240
#define EINPROGRESS
Definition: win32_port.h:344
char * fbappname
Definition: libpq-int.h:344
#define EWOULDBLOCK
Definition: win32_port.h:338
size_t ai_addrlen
Definition: getaddrinfo.h:104
PostgresPollingStatusType pqsecure_open_gss(PGconn *conn)
void pqClearAsyncResult(PGconn *conn)
Definition: fe-exec.c:750
int inCursor
Definition: libpq-int.h:442
#define EINTR
Definition: win32_port.h:332
char * port
Definition: libpq-int.h:314
#define NEGOTIATE_SSL_CODE
Definition: pqcomm.h:205
int nconnhost
Definition: libpq-int.h:399
#define snprintf
Definition: port.h:192
#define PG_PROTOCOL(m, n)
Definition: pqcomm.h:106
int pqGets_append(PQExpBuffer buf, PGconn *conn)
Definition: fe-misc.c:169
long val
Definition: informix.c:684
PGresult * PQgetResult(PGconn *conn)
Definition: fe-exec.c:1779
struct sockaddr * ai_addr
Definition: getaddrinfo.h:105
static int setKeepalivesCount(PGconn *conn)
Definition: fe-connect.c:1757
int whichhost
Definition: libpq-int.h:400
#define libpq_gettext(x)
Definition: libpq-int.h:788
bool send_appname
Definition: libpq-int.h:426
PGTransactionStatusType xactStatus
Definition: libpq-int.h:385
static const PQEnvironmentOption EnvironmentOptions[]
Definition: fe-connect.c:352
int ai_family
Definition: getaddrinfo.h:101

◆ PQconnectStart()

PGconn* PQconnectStart ( const char *  conninfo)

Definition at line 795 of file fe-connect.c.

References conn, connectDBStart(), CONNECTION_BAD, connectOptions1(), connectOptions2(), makeEmptyPGconn(), and pg_conn::status.

Referenced by PQconnectdb(), and PQping().

796 {
797  PGconn *conn;
798 
799  /*
800  * Allocate memory for the conn structure
801  */
802  conn = makeEmptyPGconn();
803  if (conn == NULL)
804  return NULL;
805 
806  /*
807  * Parse the conninfo string
808  */
809  if (!connectOptions1(conn, conninfo))
810  return conn;
811 
812  /*
813  * Compute derived options
814  */
815  if (!connectOptions2(conn))
816  return conn;
817 
818  /*
819  * Connect to the database
820  */
821  if (!connectDBStart(conn))
822  {
823  /* Just in case we failed to set it in connectDBStart */
824  conn->status = CONNECTION_BAD;
825  }
826 
827  return conn;
828 }
static bool connectOptions1(PGconn *conn, const char *conninfo)
Definition: fe-connect.c:881
PGconn * conn
Definition: streamutil.c:56
static int connectDBStart(PGconn *conn)
Definition: fe-connect.c:1882
static PGconn * makeEmptyPGconn(void)
Definition: fe-connect.c:3747
ConnStatusType status
Definition: libpq-int.h:383
static bool connectOptions2(PGconn *conn)
Definition: fe-connect.c:979

◆ PQconnectStartParams()

PGconn* PQconnectStartParams ( const char *const *  keywords,
const char *const *  values,
int  expand_dbname 
)

Definition at line 716 of file fe-connect.c.

References conn, connectDBStart(), CONNECTION_BAD, connectOptions2(), conninfo_array_parse(), pg_conn::errorMessage, fillPGconn(), makeEmptyPGconn(), PQconninfoFree(), and pg_conn::status.

Referenced by libpqrcv_connect(), PQconnectdbParams(), and PQpingParams().

719 {
720  PGconn *conn;
721  PQconninfoOption *connOptions;
722 
723  /*
724  * Allocate memory for the conn structure
725  */
726  conn = makeEmptyPGconn();
727  if (conn == NULL)
728  return NULL;
729 
730  /*
731  * Parse the conninfo arrays
732  */
733  connOptions = conninfo_array_parse(keywords, values,
734  &conn->errorMessage,
735  true, expand_dbname);
736  if (connOptions == NULL)
737  {
738  conn->status = CONNECTION_BAD;
739  /* errorMessage is already set */
740  return conn;
741  }
742 
743  /*
744  * Move option values into conn structure
745  */
746  if (!fillPGconn(conn, connOptions))
747  {
748  PQconninfoFree(connOptions);
749  return conn;
750  }
751 
752  /*
753  * Free the option info - all is in conn now
754  */
755  PQconninfoFree(connOptions);
756 
757  /*
758  * Compute derived options
759  */
760  if (!connectOptions2(conn))
761  return conn;
762 
763  /*
764  * Connect to the database
765  */
766  if (!connectDBStart(conn))
767  {
768  /* Just in case we failed to set it in connectDBStart */
769  conn->status = CONNECTION_BAD;
770  }
771 
772  return conn;
773 }
PGconn * conn
Definition: streamutil.c:56
static int connectDBStart(PGconn *conn)
Definition: fe-connect.c:1882
void PQconninfoFree(PQconninfoOption *connOptions)
Definition: fe-connect.c:6393
static PGconn * makeEmptyPGconn(void)
Definition: fe-connect.c:3747
PQExpBufferData errorMessage
Definition: libpq-int.h:509
static bool fillPGconn(PGconn *conn, PQconninfoOption *connOptions)
Definition: fe-connect.c:839
ConnStatusType status
Definition: libpq-int.h:383
static Datum values[MAXATTR]
Definition: bootstrap.c:167
static bool connectOptions2(PGconn *conn)
Definition: fe-connect.c:979
static PQconninfoOption * conninfo_array_parse(const char *const *keywords, const char *const *values, PQExpBuffer errorMessage, bool use_defaults, int expand_dbname)
Definition: fe-connect.c:5457

◆ PQconninfo()

PQconninfoOption* PQconninfo ( PGconn conn)

Definition at line 6352 of file fe-connect.c.

References conninfo_init(), conninfo_storeval(), _internalPQconninfoOption::connofs, initPQExpBuffer(), _internalPQconninfoOption::keyword, PQExpBufferDataBroken, and termPQExpBuffer().

Referenced by GenerateRecoveryConf(), has_hostaddr(), and libpqrcv_get_conninfo().

6353 {
6354  PQExpBufferData errorBuf;
6355  PQconninfoOption *connOptions;
6356 
6357  if (conn == NULL)
6358  return NULL;
6359 
6360  /* We don't actually report any errors here, but callees want a buffer */
6361  initPQExpBuffer(&errorBuf);
6362  if (PQExpBufferDataBroken(errorBuf))
6363  return NULL; /* out of memory already :-( */
6364 
6365  connOptions = conninfo_init(&errorBuf);
6366 
6367  if (connOptions != NULL)
6368  {
6370 
6371  for (option = PQconninfoOptions; option->keyword; option++)
6372  {
6373  char **connmember;
6374 
6375  if (option->connofs < 0)
6376  continue;
6377 
6378  connmember = (char **) ((char *) conn + option->connofs);
6379 
6380  if (*connmember)
6381  conninfo_storeval(connOptions, option->keyword, *connmember,
6382  &errorBuf, true, false);
6383  }
6384  }
6385 
6386  termPQExpBuffer(&errorBuf);
6387 
6388  return connOptions;
6389 }
static PQconninfoOption * conninfo_storeval(PQconninfoOption *connOptions, const char *keyword, const char *value, PQExpBuffer errorMessage, bool ignoreMissing, bool uri_decode)
Definition: fe-connect.c:6269
void termPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:131
static PQconninfoOption * conninfo_init(PQExpBuffer errorMessage)
Definition: fe-connect.c:5185
static const internalPQconninfoOption PQconninfoOptions[]
Definition: fe-connect.c:190
#define PQExpBufferDataBroken(buf)
Definition: pqexpbuffer.h:67
void initPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:92

◆ PQconninfoFree()

void PQconninfoFree ( PQconninfoOption connOptions)

Definition at line 6393 of file fe-connect.c.

References free, _PQconninfoOption::keyword, and _PQconninfoOption::val.

Referenced by check_pghost_envvar(), connectDatabase(), connectOptions1(), conninfo_array_parse(), conninfo_parse(), conninfo_uri_parse(), dblink_connstr_check(), GenerateRecoveryConf(), GetConnection(), has_hostaddr(), libpqrcv_check_conninfo(), libpqrcv_get_conninfo(), PQconndefaults(), and PQconnectStartParams().

6394 {
6396 
6397  if (connOptions == NULL)
6398  return;
6399 
6400  for (option = connOptions; option->keyword != NULL; option++)
6401  {
6402  if (option->val != NULL)
6403  free(option->val);
6404  }
6405  free(connOptions);
6406 }
#define free(a)
Definition: header.h:65

◆ PQconninfoParse()

PQconninfoOption* PQconninfoParse ( const char *  conninfo,
char **  errmsg 
)

Definition at line 5163 of file fe-connect.c.

References PQExpBufferData::data, initPQExpBuffer(), parse_connection_string(), PQExpBufferDataBroken, and termPQExpBuffer().

Referenced by connectDatabase(), dblink_connstr_check(), GetConnection(), libpqrcv_check_conninfo(), and main().

5164 {
5165  PQExpBufferData errorBuf;
5166  PQconninfoOption *connOptions;
5167 
5168  if (errmsg)
5169  *errmsg = NULL; /* default */
5170  initPQExpBuffer(&errorBuf);
5171  if (PQExpBufferDataBroken(errorBuf))
5172  return NULL; /* out of memory already :-( */
5173  connOptions = parse_connection_string(conninfo, &errorBuf, false);
5174  if (connOptions == NULL && errmsg)
5175  *errmsg = errorBuf.data;
5176  else
5177  termPQExpBuffer(&errorBuf);
5178  return connOptions;
5179 }
void termPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:131
static PQconninfoOption * parse_connection_string(const char *conninfo, PQExpBuffer errorMessage, bool use_defaults)
Definition: fe-connect.c:5225
#define PQExpBufferDataBroken(buf)
Definition: pqexpbuffer.h:67
int errmsg(const char *fmt,...)
Definition: elog.c:784
void initPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:92

◆ PQconsumeInput()

int PQconsumeInput ( PGconn conn)

Definition at line 1705 of file fe-exec.c.

References pqFlush(), pqIsnonblocking, and pqReadData().

Referenced by advanceConnectionState(), CopyStreamReceive(), dblink_get_notify(), dblink_is_busy(), ecpg_process_output(), libpqrcv_PQgetResult(), libpqrcv_receive(), main(), ParallelSlotsGetIdle(), pgfdw_get_cleanup_result(), pgfdw_get_result(), PQconnectPoll(), PrintNotifications(), StreamLogicalLog(), and try_complete_step().

1706 {
1707  if (!conn)
1708  return 0;
1709 
1710  /*
1711  * for non-blocking connections try to flush the send-queue, otherwise we
1712  * may never get a response for something that may not have already been
1713  * sent because it's in our write buffer!
1714  */
1715  if (pqIsnonblocking(conn))
1716  {
1717  if (pqFlush(conn) < 0)
1718  return 0;
1719  }
1720 
1721  /*
1722  * Load more data, if available. We do this no matter what state we are
1723  * in, since we are probably getting called because the application wants
1724  * to get rid of a read-select condition. Note that we will NOT block
1725  * waiting for more input.
1726  */
1727  if (pqReadData(conn) < 0)
1728  return 0;
1729 
1730  /* Parsing of the data waits till later. */
1731  return 1;
1732 }
int pqFlush(PGconn *conn)
Definition: fe-misc.c:998
#define pqIsnonblocking(conn)
Definition: libpq-int.h:782
int pqReadData(PGconn *conn)
Definition: fe-misc.c:629

◆ PQcopyResult()

PGresult* PQcopyResult ( const PGresult src,
int  flags 
)

Definition at line 295 of file fe-exec.c.

References pg_result::attDescs, pg_result::client_encoding, pg_result::cmdStatus, PGEventResultCopy::dest, generate_unaccent_rules::dest, dupEvents(), pg_result::events, i, pgresAttValue::len, pg_result::memorySize, pg_result::nEvents, pg_result::noticeHooks, pg_result::ntups, pg_result::numAttributes, PGEvent::passThrough, PG_COPYRES_ATTRS, PG_COPYRES_EVENTS, PG_COPYRES_NOTICEHOOKS, PG_COPYRES_TUPLES, PGEVT_RESULTCOPY, PGRES_TUPLES_OK, PQclear(), PQmakeEmptyPGresult(), PQsetResultAttrs(), PQsetvalue(), PGEvent::proc, PGEvent::resultInitialized, PGEventResultCopy::src, pg_result::tuples, and pgresAttValue::value.

Referenced by pqRowProcessor().

296 {
297  PGresult *dest;
298  int i;
299 
300  if (!src)
301  return NULL;
302 
303  dest = PQmakeEmptyPGresult(NULL, PGRES_TUPLES_OK);
304  if (!dest)
305  return NULL;
306 
307  /* Always copy these over. Is cmdStatus really useful here? */
308  dest->client_encoding = src->client_encoding;
309  strcpy(dest->cmdStatus, src->cmdStatus);
310 
311  /* Wants attrs? */
312  if (flags & (PG_COPYRES_ATTRS | PG_COPYRES_TUPLES))
313  {
314  if (!PQsetResultAttrs(dest, src->numAttributes, src->attDescs))
315  {
316  PQclear(dest);
317  return NULL;
318  }
319  }
320 
321  /* Wants to copy tuples? */
322  if (flags & PG_COPYRES_TUPLES)
323  {
324  int tup,
325  field;
326 
327  for (tup = 0; tup < src->ntups; tup++)
328  {
329  for (field = 0; field < src->numAttributes; field++)
330  {
331  if (!PQsetvalue(dest, tup, field,
332  src->tuples[tup][field].value,
333  src->tuples[tup][field].len))
334  {
335  PQclear(dest);
336  return NULL;
337  }
338  }
339  }
340  }
341 
342  /* Wants to copy notice hooks? */
343  if (flags & PG_COPYRES_NOTICEHOOKS)
344  dest->noticeHooks = src->noticeHooks;
345 
346  /* Wants to copy PGEvents? */
347  if ((flags & PG_COPYRES_EVENTS) && src->nEvents > 0)
348  {
349  dest->events = dupEvents(src->events, src->nEvents,
350  &dest->memorySize);
351  if (!dest->events)
352  {
353  PQclear(dest);
354  return NULL;
355  }
356  dest->nEvents = src->nEvents;
357  }
358 
359  /* Okay, trigger PGEVT_RESULTCOPY event */
360  for (i = 0; i < dest->nEvents; i++)
361  {
362  if (src->events[i].resultInitialized)
363  {
364  PGEventResultCopy evt;
365 
366  evt.src = src;
367  evt.dest = dest;
368  if (!dest->events[i].proc(PGEVT_RESULTCOPY, &evt,
369  dest->events[i].passThrough))
370  {
371  PQclear(dest);
372  return NULL;
373  }
374  dest->events[i].resultInitialized = true;
375  }
376  }
377 
378  return dest;
379 }
size_t memorySize
Definition: libpq-int.h:212
const PGresult * src
Definition: libpq-events.h:60
bool resultInitialized
Definition: libpq-int.h:164
int PQsetvalue(PGresult *res, int tup_num, int field_num, char *value, int len)
Definition: fe-exec.c:432
int nEvents
Definition: libpq-int.h:188
PGresAttDesc * attDescs
Definition: libpq-int.h:171
#define PG_COPYRES_TUPLES
Definition: libpq-fe.h:35
PGresAttValue ** tuples
Definition: libpq-int.h:172
#define PG_COPYRES_EVENTS
Definition: libpq-fe.h:36
PGNoticeHooks noticeHooks
Definition: libpq-int.h:186
#define PG_COPYRES_NOTICEHOOKS
Definition: libpq-fe.h:37
int PQsetResultAttrs(PGresult *res, int numAttributes, PGresAttDesc *attDescs)
Definition: fe-exec.c:230
PGresult * PQmakeEmptyPGresult(PGconn *conn, ExecStatusType status)
Definition: fe-exec.c:142
int numAttributes
Definition: libpq-int.h:170
#define PG_COPYRES_ATTRS
Definition: libpq-fe.h:34
void PQclear(PGresult *res)
Definition: fe-exec.c:695
int ntups
Definition: libpq-int.h:169
PGEventProc proc
Definition: libpq-int.h:160
char cmdStatus[CMDSTATUS_LEN]
Definition: libpq-int.h:178
int i
void * passThrough
Definition: libpq-int.h:162
char * value
Definition: libpq-int.h:138
static PGEvent * dupEvents(PGEvent *events, int count, size_t *memSize)
Definition: fe-exec.c:388
PGEvent * events
Definition: libpq-int.h:187
PGresult * dest
Definition: libpq-events.h:61
int client_encoding
Definition: libpq-int.h:189

◆ PQdb()

◆ PQdescribePortal()

PGresult* PQdescribePortal ( PGconn conn,
const char *  portal 
)

Definition at line 2176 of file fe-exec.c.

References PQexecFinish(), PQexecStart(), and PQsendDescribe().

2177 {
2178  if (!PQexecStart(conn))
2179  return NULL;
2180  if (!PQsendDescribe(conn, 'P', portal))
2181  return NULL;
2182  return PQexecFinish(conn);
2183 }
static int PQsendDescribe(PGconn *conn, char desc_type, const char *desc_target)
Definition: fe-exec.c:2221
static PGresult * PQexecFinish(PGconn *conn)
Definition: fe-exec.c:2096
static bool PQexecStart(PGconn *conn)
Definition: fe-exec.c:2022

◆ PQdescribePrepared()

PGresult* PQdescribePrepared ( PGconn conn,
const char *  stmt 
)

Definition at line 2157 of file fe-exec.c.

References PQexecFinish(), PQexecStart(), and PQsendDescribe().

Referenced by DescribeQuery(), and ECPGdescribe().

2158 {
2159  if (!PQexecStart(conn))
2160  return NULL;
2161  if (!PQsendDescribe(conn, 'S', stmt))
2162  return NULL;
2163  return PQexecFinish(conn);
2164 }
static int PQsendDescribe(PGconn *conn, char desc_type, const char *desc_target)
Definition: fe-exec.c:2221
static PGresult * PQexecFinish(PGconn *conn)
Definition: fe-exec.c:2096
static bool PQexecStart(PGconn *conn)
Definition: fe-exec.c:2022

◆ PQdisplayTuples()

void PQdisplayTuples ( const PGresult res,
FILE *  fp,
int  fillAlign,
const char *  fieldSep,
int  printHeader,
int  quiet 
)

Definition at line 578 of file fe-print.c.

References DEFAULT_FIELD_SEP, fill(), fprintf, free, i, libpq_gettext, malloc, PQfname(), PQgetlength(), PQgetvalue(), PQnfields(), PQntuples(), and generate_unaccent_rules::stdout.

585 {
586 #define DEFAULT_FIELD_SEP " "
587 
588  int i,
589  j;
590  int nFields;
591  int nTuples;
592  int *fLength = NULL;
593 
594  if (fieldSep == NULL)
595  fieldSep = DEFAULT_FIELD_SEP;
596 
597  /* Get some useful info about the results */
598  nFields = PQnfields(res);
599  nTuples = PQntuples(res);
600 
601  if (fp == NULL)
602  fp = stdout;
603 
604  /* Figure the field lengths to align to */
605  /* will be somewhat time consuming for very large results */
606  if (fillAlign)
607  {
608  fLength = (int *) malloc(nFields * sizeof(int));
609  if (!fLength)
610  {
611  fprintf(stderr, libpq_gettext("out of memory\n"));
612  abort();
613  }
614 
615  for (j = 0; j < nFields; j++)
616  {
617  fLength[j] = strlen(PQfname(res, j));
618  for (i = 0; i < nTuples; i++)
619  {
620  int flen = PQgetlength(res, i, j);
621 
622  if (flen > fLength[j])
623  fLength[j] = flen;
624  }
625  }
626  }
627 
628  if (printHeader)
629  {
630  /* first, print out the attribute names */
631  for (i = 0; i < nFields; i++)
632  {
633  fputs(PQfname(res, i), fp);
634  if (fillAlign)
635  fill(strlen(PQfname(res, i)), fLength[i], ' ', fp);
636  fputs(fieldSep, fp);
637  }
638  fprintf(fp, "\n");
639 
640  /* Underline the attribute names */
641  for (i = 0; i < nFields; i++)
642  {
643  if (fillAlign)
644  fill(0, fLength[i], '-', fp);
645  fputs(fieldSep, fp);
646  }
647  fprintf(fp, "\n");
648  }
649 
650  /* next, print out the instances */
651  for (i = 0; i < nTuples; i++)
652  {
653  for (j = 0; j < nFields; j++)
654  {
655  fprintf(fp, "%s", PQgetvalue(res, i, j));
656  if (fillAlign)
657  fill(strlen(PQgetvalue(res, i, j)), fLength[j], ' ', fp);
658  fputs(fieldSep, fp);
659  }
660  fprintf(fp, "\n");
661  }
662 
663  if (!quiet)
664  fprintf(fp, "\nQuery returned %d row%s.\n", PQntuples(res),
665  (PQntuples(res) == 1) ? "" : "s");
666 
667  fflush(fp);
668 
669  if (fLength)
670  free(fLength);
671 }
static void fill(int length, int max, char filler, FILE *fp)
Definition: fe-print.c:761
int PQgetlength(const PGresult *res, int tup_num, int field_num)
Definition: fe-exec.c:3175
int PQnfields(const PGresult *res)
Definition: fe-exec.c:2778
char * PQgetvalue(const PGresult *res, int tup_num, int field_num)
Definition: fe-exec.c:3164
char * PQfname(const PGresult *res, int field_num)
Definition: fe-exec.c:2856
int PQntuples(const PGresult *res)
Definition: fe-exec.c:2770
#define fprintf
Definition: port.h:196
#define malloc(a)
Definition: header.h:50
#define free(a)
Definition: header.h:65
#define DEFAULT_FIELD_SEP
int i
#define libpq_gettext(x)
Definition: libpq-int.h:788

◆ PQdsplen()

int PQdsplen ( const char *  s,
int  encoding 
)

Definition at line 1227 of file fe-misc.c.

References pg_encoding_dsplen().

Referenced by pg_wcsformat(), pg_wcssize(), pg_wcswidth(), and strlen_max_width().

1228 {
1229  return pg_encoding_dsplen(encoding, s);
1230 }
int pg_encoding_dsplen(int encoding, const char *mbstr)
Definition: wchar.c:1844
int32 encoding
Definition: pg_database.h:41

◆ PQencryptPassword()

char* PQencryptPassword ( const char *  passwd,
const char *  user 
)

Definition at line 1070 of file fe-auth.c.

References free, malloc, MD5_PASSWD_LEN, and pg_md5_encrypt().

1071 {
1072  char *crypt_pwd;
1073 
1074  crypt_pwd = malloc(MD5_PASSWD_LEN + 1);
1075  if (!crypt_pwd)
1076  return NULL;
1077 
1078  if (!pg_md5_encrypt(passwd, user, strlen(user), crypt_pwd))
1079  {
1080  free(crypt_pwd);
1081  return NULL;
1082  }
1083 
1084  return crypt_pwd;
1085 }
#define malloc(a)
Definition: header.h:50
bool pg_md5_encrypt(const char *passwd, const char *salt, size_t salt_len, char *buf)
Definition: md5.c:323
#define MD5_PASSWD_LEN
Definition: md5.h:20
#define free(a)
Definition: header.h:65
static char * user
Definition: pg_regress.c:95

◆ PQencryptPasswordConn()

char* PQencryptPasswordConn ( PGconn conn,
const char *  passwd,
const char *  user,
const char *  algorithm 
)

Definition at line 1112 of file fe-auth.c.

References pg_conn::errorMessage, free, libpq_gettext, malloc, MAX_ALGORITHM_NAME_LEN, MD5_PASSWD_LEN, pg_fe_scram_build_verifier(), pg_md5_encrypt(), PGRES_TUPLES_OK, PQclear(), PQexec(), PQgetvalue(), PQnfields(), PQntuples(), PQresultStatus(), printfPQExpBuffer(), and val.

Referenced by exec_command_password(), and main().

1114 {
1115 #define MAX_ALGORITHM_NAME_LEN 50
1116  char algobuf[MAX_ALGORITHM_NAME_LEN + 1];
1117  char *crypt_pwd = NULL;
1118 
1119  if (!conn)
1120  return NULL;
1121 
1122  /* If no algorithm was given, ask the server. */
1123  if (algorithm == NULL)
1124  {
1125  PGresult *res;
1126  char *val;
1127 
1128  res = PQexec(conn, "show password_encryption");
1129  if (res == NULL)
1130  {
1131  /* PQexec() should've set conn->errorMessage already */
1132  return NULL;
1133  }
1134  if (PQresultStatus(res) != PGRES_TUPLES_OK)
1135  {
1136  /* PQexec() should've set conn->errorMessage already */
1137  PQclear(res);
1138  return NULL;
1139  }
1140  if (PQntuples(res) != 1 || PQnfields(res) != 1)
1141  {
1142  PQclear(res);
1144  libpq_gettext("unexpected shape of result set returned for SHOW\n"));
1145  return NULL;
1146  }
1147  val = PQgetvalue(res, 0, 0);
1148 
1149  if (strlen(val) > MAX_ALGORITHM_NAME_LEN)
1150  {
1151  PQclear(res);
1153  libpq_gettext("password_encryption value too long\n"));
1154  return NULL;
1155  }
1156  strcpy(algobuf, val);
1157  PQclear(res);
1158 
1159  algorithm = algobuf;
1160  }
1161 
1162  /*
1163  * Also accept "on" and "off" as aliases for "md5", because
1164  * password_encryption was a boolean before PostgreSQL 10. We refuse to
1165  * send the password in plaintext even if it was "off".
1166  */
1167  if (strcmp(algorithm, "on") == 0 ||
1168  strcmp(algorithm, "off") == 0)
1169  algorithm = "md5";
1170 
1171  /*
1172  * Ok, now we know what algorithm to use
1173  */
1174  if (strcmp(algorithm, "scram-sha-256") == 0)
1175  {
1176  crypt_pwd = pg_fe_scram_build_verifier(passwd);
1177  }
1178  else if (strcmp(algorithm, "md5") == 0)
1179  {
1180  crypt_pwd = malloc(MD5_PASSWD_LEN + 1);
1181  if (crypt_pwd)
1182  {
1183  if (!pg_md5_encrypt(passwd, user, strlen(user), crypt_pwd))
1184  {
1185  free(crypt_pwd);
1186  crypt_pwd = NULL;
1187  }
1188  }
1189  }
1190  else
1191  {
1193  libpq_gettext("unrecognized password encryption algorithm \"%s\"\n"),
1194  algorithm);
1195  return NULL;
1196  }
1197 
1198  if (!crypt_pwd)
1200  libpq_gettext("out of memory\n"));
1201 
1202  return crypt_pwd;
1203 }
int PQnfields(const PGresult *res)
Definition: fe-exec.c:2778
void printfPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:237
char * PQgetvalue(const PGresult *res, int tup_num, int field_num)
Definition: fe-exec.c:3164
int PQntuples(const PGresult *res)
Definition: fe-exec.c:2770
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:2693
#define malloc(a)
Definition: header.h:50
#define MAX_ALGORITHM_NAME_LEN
bool pg_md5_encrypt(const char *passwd, const char *salt, size_t salt_len, char *buf)
Definition: md5.c:323
PQExpBufferData errorMessage
Definition: libpq-int.h:509
void PQclear(PGresult *res)
Definition: fe-exec.c:695
#define MD5_PASSWD_LEN
Definition: md5.h:20
#define free(a)
Definition: header.h:65
char * pg_fe_scram_build_verifier(const char *password)
static char * user
Definition: pg_regress.c:95
PGresult * PQexec(PGconn *conn, const char *query)
Definition: fe-exec.c:1940
long val
Definition: informix.c:684
#define libpq_gettext(x)
Definition: libpq-int.h:788

◆ PQendcopy()

int PQendcopy ( PGconn conn)

Definition at line 2619 of file fe-exec.c.

References PG_PROTOCOL_MAJOR, pqEndcopy2(), pqEndcopy3(), and pg_conn::pversion.

Referenced by ecpg_check_PQresult(), initGenerateData(), and libpqrcv_endstreaming().

2620 {
2621  if (!conn)
2622  return 0;
2623 
2624  if (PG_PROTOCOL_MAJOR(conn->pversion) >= 3)
2625  return pqEndcopy3(conn);
2626  else
2627  return pqEndcopy2(conn);
2628 }
#define PG_PROTOCOL_MAJOR(v)
Definition: pqcomm.h:104
int pqEndcopy3(PGconn *conn)
ProtocolVersion pversion
Definition: libpq-int.h:409
int pqEndcopy2(PGconn *conn)

◆ PQenv2encoding()

int PQenv2encoding ( void  )

Definition at line 1236 of file fe-misc.c.

References dgettext, dngettext, encoding, libpq_gettext, libpq_ngettext, pg_char_to_encoding(), PG_SQL_ASCII, PG_TEXTDOMAIN, and generate_unaccent_rules::str.

Referenced by main().

1237 {
1238  char *str;
1239  int encoding = PG_SQL_ASCII;
1240 
1241  str = getenv("PGCLIENTENCODING");
1242  if (str && *str != '\0')
1243  {
1244  encoding = pg_char_to_encoding(str);
1245  if (encoding < 0)
1246  encoding = PG_SQL_ASCII;
1247  }
1248  return encoding;
1249 }
int pg_char_to_encoding(const char *name)
Definition: encnames.c:551
int32 encoding
Definition: pg_database.h:41

◆ PQerrorMessage()