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 PQTRACE_SUPPRESS_TIMESTAMPS   (1<<0)
 
#define PQTRACE_REGRESS_MODE   (1<<1)
 
#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)
 
typedef int(* PQsslKeyPassHook_OpenSSL_type) (char *buf, int size, PGconn *conn)
 

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, CONNECTION_CHECK_STANDBY
}
 
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, PGRES_PIPELINE_SYNC, PGRES_PIPELINE_ABORTED
}
 
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 }
 
enum  PGpipelineStatus { PQ_PIPELINE_OFF, PQ_PIPELINE_ON, PQ_PIPELINE_ABORTED }
 

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)
 
PGpipelineStatus PQpipelineStatus (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)
 
PQnoticeReceiver PQsetNoticeReceiver (PGconn *conn, PQnoticeReceiver proc, void *arg)
 
PQnoticeProcessor PQsetNoticeProcessor (PGconn *conn, PQnoticeProcessor proc, void *arg)
 
pgthreadlock_t PQregisterThreadLock (pgthreadlock_t newhandler)
 
void PQtrace (PGconn *conn, FILE *debug_port)
 
void PQuntrace (PGconn *conn)
 
void PQtraceSetFlags (PGconn *conn, int flags)
 
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)
 
int PQenterPipelineMode (PGconn *conn)
 
int PQexitPipelineMode (PGconn *conn)
 
int PQpipelineSync (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)
 
PQsslKeyPassHook_OpenSSL_type PQgetSSLKeyPassHook_OpenSSL (void)
 
void PQsetSSLKeyPassHook_OpenSSL (PQsslKeyPassHook_OpenSSL_type hook)
 
int PQdefaultSSLKeyPassHook_OpenSSL (char *buf, int size, PGconn *conn)
 

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 543 of file libpq-fe.h.

◆ PQnoPasswordSupplied

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

Definition at line 547 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 284 of file libpq-fe.h.

Referenced by main().

◆ PQTRACE_REGRESS_MODE

#define PQTRACE_REGRESS_MODE   (1<<1)

Definition at line 405 of file libpq-fe.h.

Referenced by main(), and pqTraceOutputMessage().

◆ PQTRACE_SUPPRESS_TIMESTAMPS

#define PQTRACE_SUPPRESS_TIMESTAMPS   (1<<0)

Definition at line 403 of file libpq-fe.h.

Referenced by main(), pqTraceOutputMessage(), and pqTraceOutputNoTypeByteMessage().

Typedef Documentation

◆ PGcancel

typedef struct pg_cancel PGcancel

Definition at line 168 of file libpq-fe.h.

◆ PGconn

typedef struct pg_conn PGconn

Definition at line 155 of file libpq-fe.h.

◆ PGnotify

typedef struct pgNotify PGnotify

◆ PGresAttDesc

typedef struct pgresAttDesc PGresAttDesc

◆ PGresult

typedef struct pg_result PGresult

Definition at line 162 of file libpq-fe.h.

◆ pgthreadlock_t

typedef void(* pgthreadlock_t) (int acquire)

Definition at line 393 of file libpq-fe.h.

◆ pqbool

typedef char pqbool

Definition at line 190 of file libpq-fe.h.

◆ PQconninfoOption

◆ PQnoticeProcessor

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

Definition at line 187 of file libpq-fe.h.

◆ PQnoticeReceiver

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

Definition at line 186 of file libpq-fe.h.

◆ PQprintOpt

typedef struct _PQprintOpt PQprintOpt

◆ PQsslKeyPassHook_OpenSSL_type

typedef int(* PQsslKeyPassHook_OpenSSL_type) (char *buf, int size, PGconn *conn)

Definition at line 648 of file libpq-fe.h.

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 
CONNECTION_CHECK_STANDBY 

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, /* This state is no longer used. */
64  CONNECTION_SSL_STARTUP, /* Negotiating SSL. */
65  CONNECTION_NEEDED, /* Internal state: connect() needed */
66  CONNECTION_CHECK_WRITABLE, /* Checking if session is read-write. */
67  CONNECTION_CONSUME, /* Consuming any extra messages. */
68  CONNECTION_GSS_STARTUP, /* Negotiating GSSAPI. */
69  CONNECTION_CHECK_TARGET, /* Checking target server properties. */
70  CONNECTION_CHECK_STANDBY /* Checking if server is in standby mode. */
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 
PGRES_PIPELINE_SYNC 
PGRES_PIPELINE_ABORTED 

Definition at line 83 of file libpq-fe.h.

84 {
85  PGRES_EMPTY_QUERY = 0, /* empty query string was executed */
86  PGRES_COMMAND_OK, /* a query command that doesn't return
87  * anything was executed properly by the
88  * backend */
89  PGRES_TUPLES_OK, /* a query command that returns tuples was
90  * executed properly by the backend, PGresult
91  * contains the result tuples */
92  PGRES_COPY_OUT, /* Copy Out data transfer in progress */
93  PGRES_COPY_IN, /* Copy In data transfer in progress */
94  PGRES_BAD_RESPONSE, /* an unexpected response was recv'd from the
95  * backend */
96  PGRES_NONFATAL_ERROR, /* notice or warning message */
97  PGRES_FATAL_ERROR, /* query failed */
98  PGRES_COPY_BOTH, /* Copy In/Out data transfer in progress */
99  PGRES_SINGLE_TUPLE, /* single tuple from larger resultset */
100  PGRES_PIPELINE_SYNC, /* pipeline synchronization point */
101  PGRES_PIPELINE_ABORTED, /* Command didn't run because of an abort
102  * earlier in a pipeline */
ExecStatusType
Definition: libpq-fe.h:83

◆ PGContextVisibility

Enumerator
PQSHOW_CONTEXT_NEVER 
PQSHOW_CONTEXT_ERRORS 
PQSHOW_CONTEXT_ALWAYS 

Definition at line 122 of file libpq-fe.h.

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

◆ PGPing

enum PGPing
Enumerator
PQPING_OK 
PQPING_REJECT 
PQPING_NO_RESPONSE 
PQPING_NO_ATTEMPT 

Definition at line 134 of file libpq-fe.h.

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

◆ PGpipelineStatus

Enumerator
PQ_PIPELINE_OFF 
PQ_PIPELINE_ON 
PQ_PIPELINE_ABORTED 

Definition at line 145 of file libpq-fe.h.

◆ PGTransactionStatusType

Enumerator
PQTRANS_IDLE 
PQTRANS_ACTIVE 
PQTRANS_INTRANS 
PQTRANS_INERROR 
PQTRANS_UNKNOWN 

Definition at line 105 of file libpq-fe.h.

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

◆ PGVerbosity

Enumerator
PQERRORS_TERSE 
PQERRORS_DEFAULT 
PQERRORS_VERBOSE 
PQERRORS_SQLSTATE 

Definition at line 114 of file libpq-fe.h.

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

◆ PostgresPollingStatusType

Enumerator
PGRES_POLLING_FAILED 
PGRES_POLLING_READING 
PGRES_POLLING_WRITING 
PGRES_POLLING_OK 
PGRES_POLLING_ACTIVE 

Definition at line 73 of file libpq-fe.h.

74 {
76  PGRES_POLLING_READING, /* These two indicate that one may */
77  PGRES_POLLING_WRITING, /* use select before polling again. */
79  PGRES_POLLING_ACTIVE /* unused; keep for awhile for backwards
80  * compatibility */
PostgresPollingStatusType
Definition: libpq-fe.h:73

Function Documentation

◆ lo_close()

int lo_close ( PGconn conn,
int  fd 
)

Definition at line 96 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().

97 {
98  PQArgBlock argv[1];
99  PGresult *res;
100  int retval;
101  int result_len;
102 
103  if (lo_initialize(conn) < 0)
104  return -1;
105 
106  argv[0].isint = 1;
107  argv[0].len = 4;
108  argv[0].u.integer = fd;
109  res = PQfn(conn, conn->lobjfuncs->fn_lo_close,
110  &retval, &result_len, 1, argv, 1);
111  if (PQresultStatus(res) == PGRES_COMMAND_OK)
112  {
113  PQclear(res);
114  return retval;
115  }
116  else
117  {
118  PQclear(res);
119  return -1;
120  }
121 }
union PQArgBlock::@161 u
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:2783
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3097
void PQclear(PGresult *res)
Definition: fe-exec.c:680
Oid fn_lo_close
Definition: libpq-int.h:270
int isint
Definition: libpq-fe.h:238
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:475
int integer
Definition: libpq-fe.h:242
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:853

◆ lo_creat()

Oid lo_creat ( PGconn conn,
int  mode 
)

Definition at line 444 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().

445 {
446  PQArgBlock argv[1];
447  PGresult *res;
448  int retval;
449  int result_len;
450 
451  if (lo_initialize(conn) < 0)
452  return InvalidOid;
453 
454  argv[0].isint = 1;
455  argv[0].len = 4;
456  argv[0].u.integer = mode;
457  res = PQfn(conn, conn->lobjfuncs->fn_lo_creat,
458  &retval, &result_len, 1, argv, 1);
459  if (PQresultStatus(res) == PGRES_COMMAND_OK)
460  {
461  PQclear(res);
462  return (Oid) retval;
463  }
464  else
465  {
466  PQclear(res);
467  return InvalidOid;
468  }
469 }
static PgChecksumMode mode
Definition: pg_checksums.c:61
union PQArgBlock::@161 u
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:2783
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3097
#define InvalidOid
Definition: postgres_ext.h:36
void PQclear(PGresult *res)
Definition: fe-exec.c:680
Oid fn_lo_creat
Definition: libpq-int.h:271
int isint
Definition: libpq-fe.h:238
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:475
int integer
Definition: libpq-fe.h:242
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:853

◆ lo_create()

Oid lo_create ( PGconn conn,
Oid  lobjId 
)

Definition at line 480 of file fe-lobj.c.

References appendPQExpBuffer(), 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(), and PQArgBlock::u.

Referenced by lo_import_internal(), and StartRestoreBlob().

481 {
482  PQArgBlock argv[1];
483  PGresult *res;
484  int retval;
485  int result_len;
486 
487  if (lo_initialize(conn) < 0)
488  return InvalidOid;
489 
490  /* Must check this on-the-fly because it's not there pre-8.1 */
491  if (conn->lobjfuncs->fn_lo_create == 0)
492  {
494  libpq_gettext("cannot determine OID of function %s\n"),
495  "lo_create");
496  return InvalidOid;
497  }
498 
499  argv[0].isint = 1;
500  argv[0].len = 4;
501  argv[0].u.integer = lobjId;
502  res = PQfn(conn, conn->lobjfuncs->fn_lo_create,
503  &retval, &result_len, 1, argv, 1);
504  if (PQresultStatus(res) == PGRES_COMMAND_OK)
505  {
506  PQclear(res);
507  return (Oid) retval;
508  }
509  else
510  {
511  PQclear(res);
512  return InvalidOid;
513  }
514 }
union PQArgBlock::@161 u
Oid fn_lo_create
Definition: libpq-int.h:272
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:2783
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3097
void appendPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:267
PQExpBufferData errorMessage
Definition: libpq-int.h:569
#define InvalidOid
Definition: postgres_ext.h:36
void PQclear(PGresult *res)
Definition: fe-exec.c:680
int isint
Definition: libpq-fe.h:238
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:475
#define libpq_gettext(x)
Definition: libpq-int.h:846
int integer
Definition: libpq-fe.h:242
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:853

◆ lo_export()

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

Definition at line 757 of file fe-lobj.c.

References appendPQExpBuffer(), 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().

758 {
759  int result = 1;
760  int fd;
761  int nbytes,
762  tmp;
763  char buf[LO_BUFSIZE];
764  int lobj;
765  char sebuf[PG_STRERROR_R_BUFLEN];
766 
767  /*
768  * open the large object.
769  */
770  lobj = lo_open(conn, lobjId, INV_READ);
771  if (lobj == -1)
772  {
773  /* we assume lo_open() already set a suitable error message */
774  return -1;
775  }
776 
777  /*
778  * create the file to be written to
779  */
780  fd = open(filename, O_CREAT | O_WRONLY | O_TRUNC | PG_BINARY, 0666);
781  if (fd < 0)
782  {
783  /* We must do lo_close before setting the errorMessage */
784  int save_errno = errno;
785 
786  (void) lo_close(conn, lobj);
787  /* deliberately overwrite any error from lo_close */
789  libpq_gettext("could not open file \"%s\": %s\n"),
790  filename,
791  strerror_r(save_errno, sebuf, sizeof(sebuf)));
792  return -1;
793  }
794 
795  /*
796  * read in from the large object and write to the file
797  */
798  while ((nbytes = lo_read(conn, lobj, buf, LO_BUFSIZE)) > 0)
799  {
800  tmp = write(fd, buf, nbytes);
801  if (tmp != nbytes)
802  {
803  /* We must do lo_close before setting the errorMessage */
804  int save_errno = errno;
805 
806  (void) lo_close(conn, lobj);
807  (void) close(fd);
808  /* deliberately overwrite any error from lo_close */
810  libpq_gettext("could not write to file \"%s\": %s\n"),
811  filename,
812  strerror_r(save_errno, sebuf, sizeof(sebuf)));
813  return -1;
814  }
815  }
816 
817  /*
818  * If lo_read() failed, we are now in an aborted transaction so there's no
819  * need for lo_close(); furthermore, if we tried it we'd overwrite the
820  * useful error result with a useless one. So skip lo_close() if we got a
821  * failure result.
822  */
823  if (nbytes < 0 ||
824  lo_close(conn, lobj) != 0)
825  {
826  /* assume lo_read() or lo_close() left a suitable error message */
827  result = -1;
828  }
829 
830  /* if we already failed, don't overwrite that msg with a close error */
831  if (close(fd) != 0 && result >= 0)
832  {
834  libpq_gettext("could not write to file \"%s\": %s\n"),
835  filename, strerror_r(errno, sebuf, sizeof(sebuf)));
836  result = -1;
837  }
838 
839  return result;
840 }
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:234
static int fd(const char *x, int i)
Definition: preproc-init.c:105
#define PG_BINARY
Definition: c.h:1271
#define INV_READ
Definition: libpq-fs.h:22
int lo_close(PGconn *conn, int fd)
Definition: fe-lobj.c:96
void appendPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:267
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:569
#define LO_BUFSIZE
Definition: fe-lobj.c:42
#define strerror_r
Definition: port.h:233
static char * filename
Definition: pg_dumpall.c:91
int lo_read(PGconn *conn, int fd, char *buf, size_t len)
Definition: fe-lobj.c:248
#define close(a)
Definition: win32.h:12
#define libpq_gettext(x)
Definition: libpq-int.h:846

◆ lo_import()

Oid lo_import ( PGconn conn,
const char *  filename 
)

Definition at line 634 of file fe-lobj.c.

References InvalidOid, and lo_import_internal().

Referenced by do_lo_import(), and main().

635 {
636  return lo_import_internal(conn, filename, InvalidOid);
637 }
static Oid lo_import_internal(PGconn *conn, const char *filename, Oid oid)
Definition: fe-lobj.c:655
#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 649 of file fe-lobj.c.

References lo_import_internal().

650 {
651  return lo_import_internal(conn, filename, lobjId);
652 }
static Oid lo_import_internal(PGconn *conn, const char *filename, Oid oid)
Definition: fe-lobj.c:655
static char * filename
Definition: pg_dumpall.c:91

◆ lo_lseek()

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

Definition at line 349 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().

350 {
351  PQArgBlock argv[3];
352  PGresult *res;
353  int retval;
354  int result_len;
355 
356  if (lo_initialize(conn) < 0)
357  return -1;
358 
359  argv[0].isint = 1;
360  argv[0].len = 4;
361  argv[0].u.integer = fd;
362 
363  argv[1].isint = 1;
364  argv[1].len = 4;
365  argv[1].u.integer = offset;
366 
367  argv[2].isint = 1;
368  argv[2].len = 4;
369  argv[2].u.integer = whence;
370 
371  res = PQfn(conn, conn->lobjfuncs->fn_lo_lseek,
372  &retval, &result_len, 1, argv, 3);
373  if (PQresultStatus(res) == PGRES_COMMAND_OK)
374  {
375  PQclear(res);
376  return retval;
377  }
378  else
379  {
380  PQclear(res);
381  return -1;
382  }
383 }
union PQArgBlock::@161 u
Oid fn_lo_lseek
Definition: libpq-int.h:274
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:2783
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3097
void PQclear(PGresult *res)
Definition: fe-exec.c:680
int isint
Definition: libpq-fe.h:238
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:475
int integer
Definition: libpq-fe.h:242
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:853

◆ lo_lseek64()

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

Definition at line 390 of file fe-lobj.c.

References appendPQExpBuffer(), 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(), PQArgBlock::ptr, and PQArgBlock::u.

Referenced by overwrite(), and pickout().

391 {
392  PQArgBlock argv[3];
393  PGresult *res;
394  pg_int64 retval;
395  int result_len;
396 
397  if (lo_initialize(conn) < 0)
398  return -1;
399 
400  if (conn->lobjfuncs->fn_lo_lseek64 == 0)
401  {
403  libpq_gettext("cannot determine OID of function %s\n"),
404  "lo_lseek64");
405  return -1;
406  }
407 
408  argv[0].isint = 1;
409  argv[0].len = 4;
410  argv[0].u.integer = fd;
411 
412  offset = lo_hton64(offset);
413  argv[1].isint = 0;
414  argv[1].len = 8;
415  argv[1].u.ptr = (int *) &offset;
416 
417  argv[2].isint = 1;
418  argv[2].len = 4;
419  argv[2].u.integer = whence;
420 
421  res = PQfn(conn, conn->lobjfuncs->fn_lo_lseek64,
422  (void *) &retval, &result_len, 0, argv, 3);
423  if (PQresultStatus(res) == PGRES_COMMAND_OK && result_len == 8)
424  {
425  PQclear(res);
426  return lo_ntoh64(retval);
427  }
428  else
429  {
430  PQclear(res);
431  return -1;
432  }
433 }
union PQArgBlock::@161 u
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:2783
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3097
PG_INT64_TYPE pg_int64
Definition: postgres_ext.h:47
void appendPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:267
static pg_int64 lo_hton64(pg_int64 host64)
Definition: fe-lobj.c:1043
PQExpBufferData errorMessage
Definition: libpq-int.h:569
void PQclear(PGresult *res)
Definition: fe-exec.c:680
Oid fn_lo_lseek64
Definition: libpq-int.h:275
int isint
Definition: libpq-fe.h:238
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:475
int * ptr
Definition: libpq-fe.h:241
#define libpq_gettext(x)
Definition: libpq-int.h:846
int integer
Definition: libpq-fe.h:242
static pg_int64 lo_ntoh64(pg_int64 net64)
Definition: fe-lobj.c:1068
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:853

◆ 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 (lo_initialize(conn) < 0)
65  return -1;
66 
67  argv[0].isint = 1;
68  argv[0].len = 4;
69  argv[0].u.integer = lobjId;
70 
71  argv[1].isint = 1;
72  argv[1].len = 4;
73  argv[1].u.integer = mode;
74 
75  res = PQfn(conn, conn->lobjfuncs->fn_lo_open, &fd, &result_len, 1, argv, 2);
76  if (PQresultStatus(res) == PGRES_COMMAND_OK)
77  {
78  PQclear(res);
79  return fd;
80  }
81  else
82  {
83  PQclear(res);
84  return -1;
85  }
86 }
static PgChecksumMode mode
Definition: pg_checksums.c:61
union PQArgBlock::@161 u
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:2783
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3097
Oid fn_lo_open
Definition: libpq-int.h:269
void PQclear(PGresult *res)
Definition: fe-exec.c:680
int isint
Definition: libpq-fe.h:238
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:475
int integer
Definition: libpq-fe.h:242
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:853

◆ lo_read()

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

Definition at line 248 of file fe-lobj.c.

References appendPQExpBufferStr(), 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(), and PQArgBlock::u.

Referenced by lo_export().

249 {
250  PQArgBlock argv[2];
251  PGresult *res;
252  int result_len;
253 
254  if (lo_initialize(conn) < 0)
255  return -1;
256 
257  /*
258  * Long ago, somebody thought it'd be a good idea to declare this function
259  * as taking size_t ... but the underlying backend function only accepts a
260  * signed int32 length. So throw error if the given value overflows
261  * int32.
262  */
263  if (len > (size_t) INT_MAX)
264  {
266  libpq_gettext("argument of lo_read exceeds integer range\n"));
267  return -1;
268  }
269 
270  argv[0].isint = 1;
271  argv[0].len = 4;
272  argv[0].u.integer = fd;
273 
274  argv[1].isint = 1;
275  argv[1].len = 4;
276  argv[1].u.integer = (int) len;
277 
278  res = PQfn(conn, conn->lobjfuncs->fn_lo_read,
279  (void *) buf, &result_len, 0, argv, 2);
280  if (PQresultStatus(res) == PGRES_COMMAND_OK)
281  {
282  PQclear(res);
283  return result_len;
284  }
285  else
286  {
287  PQclear(res);
288  return -1;
289  }
290 }
union PQArgBlock::@161 u
void appendPQExpBufferStr(PQExpBuffer str, const char *data)
Definition: pqexpbuffer.c:369
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:2783
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3097
Oid fn_lo_read
Definition: libpq-int.h:280
static char * buf
Definition: pg_test_fsync.c:68
PQExpBufferData errorMessage
Definition: libpq-int.h:569
void PQclear(PGresult *res)
Definition: fe-exec.c:680
int isint
Definition: libpq-fe.h:238
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:475
#define libpq_gettext(x)
Definition: libpq-int.h:846
int integer
Definition: libpq-fe.h:242
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:853

◆ lo_tell()

int lo_tell ( PGconn conn,
int  fd 
)

Definition at line 522 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.

523 {
524  int retval;
525  PQArgBlock argv[1];
526  PGresult *res;
527  int result_len;
528 
529  if (lo_initialize(conn) < 0)
530  return -1;
531 
532  argv[0].isint = 1;
533  argv[0].len = 4;
534  argv[0].u.integer = fd;
535 
536  res = PQfn(conn, conn->lobjfuncs->fn_lo_tell,
537  &retval, &result_len, 1, argv, 1);
538  if (PQresultStatus(res) == PGRES_COMMAND_OK)
539  {
540  PQclear(res);
541  return retval;
542  }
543  else
544  {
545  PQclear(res);
546  return -1;
547  }
548 }
union PQArgBlock::@161 u
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:2783
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3097
Oid fn_lo_tell
Definition: libpq-int.h:276
void PQclear(PGresult *res)
Definition: fe-exec.c:680
int isint
Definition: libpq-fe.h:238
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:475
int integer
Definition: libpq-fe.h:242
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:853

◆ lo_tell64()

pg_int64 lo_tell64 ( PGconn conn,
int  fd 
)

Definition at line 555 of file fe-lobj.c.

References appendPQExpBuffer(), 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(), and PQArgBlock::u.

Referenced by pickout().

556 {
557  pg_int64 retval;
558  PQArgBlock argv[1];
559  PGresult *res;
560  int result_len;
561 
562  if (lo_initialize(conn) < 0)
563  return -1;
564 
565  if (conn->lobjfuncs->fn_lo_tell64 == 0)
566  {
568  libpq_gettext("cannot determine OID of function %s\n"),
569  "lo_tell64");
570  return -1;
571  }
572 
573  argv[0].isint = 1;
574  argv[0].len = 4;
575  argv[0].u.integer = fd;
576 
577  res = PQfn(conn, conn->lobjfuncs->fn_lo_tell64,
578  (void *) &retval, &result_len, 0, argv, 1);
579  if (PQresultStatus(res) == PGRES_COMMAND_OK && result_len == 8)
580  {
581  PQclear(res);
582  return lo_ntoh64(retval);
583  }
584  else
585  {
586  PQclear(res);
587  return -1;
588  }
589 }
union PQArgBlock::@161 u
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:2783
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3097
PG_INT64_TYPE pg_int64
Definition: postgres_ext.h:47
void appendPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:267
Oid fn_lo_tell64
Definition: libpq-int.h:277
PQExpBufferData errorMessage
Definition: libpq-int.h:569
void PQclear(PGresult *res)
Definition: fe-exec.c:680
int isint
Definition: libpq-fe.h:238
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:475
#define libpq_gettext(x)
Definition: libpq-int.h:846
int integer
Definition: libpq-fe.h:242
static pg_int64 lo_ntoh64(pg_int64 net64)
Definition: fe-lobj.c:1068
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:853

◆ lo_truncate()

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

Definition at line 131 of file fe-lobj.c.

References appendPQExpBuffer(), appendPQExpBufferStr(), 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(), and PQArgBlock::u.

132 {
133  PQArgBlock argv[2];
134  PGresult *res;
135  int retval;
136  int result_len;
137 
138  if (lo_initialize(conn) < 0)
139  return -1;
140 
141  /* Must check this on-the-fly because it's not there pre-8.3 */
142  if (conn->lobjfuncs->fn_lo_truncate == 0)
143  {
145  libpq_gettext("cannot determine OID of function %s\n"),
146  "lo_truncate");
147  return -1;
148  }
149 
150  /*
151  * Long ago, somebody thought it'd be a good idea to declare this function
152  * as taking size_t ... but the underlying backend function only accepts a
153  * signed int32 length. So throw error if the given value overflows
154  * int32. (A possible alternative is to automatically redirect the call
155  * to lo_truncate64; but if the caller wanted to rely on that backend
156  * function being available, he could have called lo_truncate64 for
157  * himself.)
158  */
159  if (len > (size_t) INT_MAX)
160  {
162  libpq_gettext("argument of lo_truncate exceeds integer range\n"));
163  return -1;
164  }
165 
166  argv[0].isint = 1;
167  argv[0].len = 4;
168  argv[0].u.integer = fd;
169 
170  argv[1].isint = 1;
171  argv[1].len = 4;
172  argv[1].u.integer = (int) len;
173 
174  res = PQfn(conn, conn->lobjfuncs->fn_lo_truncate,
175  &retval, &result_len, 1, argv, 2);
176 
177  if (PQresultStatus(res) == PGRES_COMMAND_OK)
178  {
179  PQclear(res);
180  return retval;
181  }
182  else
183  {
184  PQclear(res);
185  return -1;
186  }
187 }
union PQArgBlock::@161 u
void appendPQExpBufferStr(PQExpBuffer str, const char *data)
Definition: pqexpbuffer.c:369
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:2783
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3097
Oid fn_lo_truncate
Definition: libpq-int.h:278
void appendPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:267
PQExpBufferData errorMessage
Definition: libpq-int.h:569
void PQclear(PGresult *res)
Definition: fe-exec.c:680
int isint
Definition: libpq-fe.h:238
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:475
#define libpq_gettext(x)
Definition: libpq-int.h:846
int integer
Definition: libpq-fe.h:242
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:853

◆ lo_truncate64()

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

Definition at line 197 of file fe-lobj.c.

References appendPQExpBuffer(), 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(), PQArgBlock::ptr, and PQArgBlock::u.

Referenced by my_truncate().

198 {
199  PQArgBlock argv[2];
200  PGresult *res;
201  int retval;
202  int result_len;
203 
204  if (lo_initialize(conn) < 0)
205  return -1;
206 
207  if (conn->lobjfuncs->fn_lo_truncate64 == 0)
208  {
210  libpq_gettext("cannot determine OID of function %s\n"),
211  "lo_truncate64");
212  return -1;
213  }
214 
215  argv[0].isint = 1;
216  argv[0].len = 4;
217  argv[0].u.integer = fd;
218 
219  len = lo_hton64(len);
220  argv[1].isint = 0;
221  argv[1].len = 8;
222  argv[1].u.ptr = (int *) &len;
223 
224  res = PQfn(conn, conn->lobjfuncs->fn_lo_truncate64,
225  &retval, &result_len, 1, argv, 2);
226 
227  if (PQresultStatus(res) == PGRES_COMMAND_OK)
228  {
229  PQclear(res);
230  return retval;
231  }
232  else
233  {
234  PQclear(res);
235  return -1;
236  }
237 }
union PQArgBlock::@161 u
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:2783
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3097
void appendPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:267
static pg_int64 lo_hton64(pg_int64 host64)
Definition: fe-lobj.c:1043
Oid fn_lo_truncate64
Definition: libpq-int.h:279
PQExpBufferData errorMessage
Definition: libpq-int.h:569
void PQclear(PGresult *res)
Definition: fe-exec.c:680
int isint
Definition: libpq-fe.h:238
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:475
int * ptr
Definition: libpq-fe.h:241
#define libpq_gettext(x)
Definition: libpq-int.h:846
int integer
Definition: libpq-fe.h:242
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:853

◆ lo_unlink()

int lo_unlink ( PGconn conn,
Oid  lobjId 
)

Definition at line 597 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().

598 {
599  PQArgBlock argv[1];
600  PGresult *res;
601  int result_len;
602  int retval;
603 
604  if (lo_initialize(conn) < 0)
605  return -1;
606 
607  argv[0].isint = 1;
608  argv[0].len = 4;
609  argv[0].u.integer = lobjId;
610 
611  res = PQfn(conn, conn->lobjfuncs->fn_lo_unlink,
612  &retval, &result_len, 1, argv, 1);
613  if (PQresultStatus(res) == PGRES_COMMAND_OK)
614  {
615  PQclear(res);
616  return retval;
617  }
618  else
619  {
620  PQclear(res);
621  return -1;
622  }
623 }
union PQArgBlock::@161 u
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:2783
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3097
void PQclear(PGresult *res)
Definition: fe-exec.c:680
Oid fn_lo_unlink
Definition: libpq-int.h:273
int isint
Definition: libpq-fe.h:238
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:475
int integer
Definition: libpq-fe.h:242
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:853

◆ lo_write()

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

Definition at line 299 of file fe-lobj.c.

References appendPQExpBufferStr(), 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(), PQArgBlock::ptr, PQArgBlock::u, and unconstify.

Referenced by lo_import_internal().

300 {
301  PQArgBlock argv[2];
302  PGresult *res;
303  int result_len;
304  int retval;
305 
306  if (lo_initialize(conn) < 0)
307  return -1;
308 
309  /*
310  * Long ago, somebody thought it'd be a good idea to declare this function
311  * as taking size_t ... but the underlying backend function only accepts a
312  * signed int32 length. So throw error if the given value overflows
313  * int32.
314  */
315  if (len > (size_t) INT_MAX)
316  {
318  libpq_gettext("argument of lo_write exceeds integer range\n"));
319  return -1;
320  }
321 
322  argv[0].isint = 1;
323  argv[0].len = 4;
324  argv[0].u.integer = fd;
325 
326  argv[1].isint = 0;
327  argv[1].len = (int) len;
328  argv[1].u.ptr = (int *) unconstify(char *, buf);
329 
330  res = PQfn(conn, conn->lobjfuncs->fn_lo_write,
331  &retval, &result_len, 1, argv, 2);
332  if (PQresultStatus(res) == PGRES_COMMAND_OK)
333  {
334  PQclear(res);
335  return retval;
336  }
337  else
338  {
339  PQclear(res);
340  return -1;
341  }
342 }
union PQArgBlock::@161 u
Oid fn_lo_write
Definition: libpq-int.h:281
void appendPQExpBufferStr(PQExpBuffer str, const char *data)
Definition: pqexpbuffer.c:369
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:2783
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3097
static char * buf
Definition: pg_test_fsync.c:68
#define unconstify(underlying_type, expr)
Definition: c.h:1243
PQExpBufferData errorMessage
Definition: libpq-int.h:569
void PQclear(PGresult *res)
Definition: fe-exec.c:680
int isint
Definition: libpq-fe.h:238
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:475
int * ptr
Definition: libpq-fe.h:241
#define libpq_gettext(x)
Definition: libpq-int.h:846
int integer
Definition: libpq-fe.h:242
static int lo_initialize(PGconn *conn)
Definition: fe-lobj.c:853

◆ pg_char_to_encoding()

int pg_char_to_encoding ( const char *  name)

Definition at line 550 of file encnames.c.

References clean_encoding_name(), 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(), test_enc_conversion(), and to_ascii_encname().

551 {
552  unsigned int nel = lengthof(pg_encname_tbl);
553  const pg_encname *base = pg_encname_tbl,
554  *last = base + nel - 1,
555  *position;
556  int result;
557  char buff[NAMEDATALEN],
558  *key;
559 
560  if (name == NULL || *name == '\0')
561  return -1;
562 
563  if (strlen(name) >= NAMEDATALEN)
564  return -1; /* it's certainly not in the table */
565 
566  key = clean_encoding_name(name, buff);
567 
568  while (last >= base)
569  {
570  position = base + ((last - base) >> 1);
571  result = key[0] - position->name[0];
572 
573  if (result == 0)
574  {
575  result = strcmp(key, position->name);
576  if (result == 0)
577  return position->encoding;
578  }
579  if (result < 0)
580  last = position - 1;
581  else
582  base = position + 1;
583  }
584  return -1;
585 }
#define lengthof(array)
Definition: c.h:734
#define NAMEDATALEN
static const pg_encname pg_encname_tbl[]
Definition: encnames.c:39
const char * name
Definition: encode.c:515
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 514 of file encnames.c.

References PG_VALID_BE_ENCODING.

Referenced by setup_locale_encoding().

515 {
517 }
#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 6753 of file fe-connect.c.

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

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

6754 {
6755  if (!conn || conn->status != CONNECTION_OK)
6756  return 0;
6757  return conn->be_pid;
6758 }
ConnStatusType status
Definition: libpq-int.h:409
int be_pid
Definition: libpq-int.h:466

◆ PQbinaryTuples()

int PQbinaryTuples ( const PGresult res)

Definition at line 3183 of file fe-exec.c.

References pg_result::binary.

Referenced by ProcessResult().

3184 {
3185  if (!res)
3186  return 0;
3187  return res->binary;
3188 }
int binary
Definition: libpq-int.h:179

◆ PQcancel()

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

Definition at line 4497 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().

4498 {
4499  if (!cancel)
4500  {
4501  strlcpy(errbuf, "PQcancel() -- no cancel object supplied", errbufsize);
4502  return false;
4503  }
4504 
4505  return internal_cancel(&cancel->raddr, cancel->be_pid, cancel->be_key,
4506  errbuf, errbufsize);
4507 }
static int internal_cancel(SockAddr *raddr, int be_pid, int be_key, char *errbuf, int errbufsize)
Definition: fe-connect.c:4393
int be_pid
Definition: libpq-int.h:582
int be_key
Definition: libpq-int.h:583
size_t strlcpy(char *dst, const char *src, size_t siz)
Definition: strlcpy.c:45
SockAddr raddr
Definition: libpq-int.h:581

◆ PQclear()

void PQclear ( PGresult res)

Definition at line 680 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(), append_depends_on_extension(), 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_data_type_usage(), 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_for_user_defined_encoding_conversions(), check_for_user_defined_postfix_ops(), check_is_install_user(), check_loadable_libraries(), check_prepare_conn(), check_proper_datallowconn(), ClearOrSaveResult(), close_cursor(), cluster_all_databases(), compile_database_list(), compile_relation_list_one_db(), connectDatabase(), ConnectDatabase(), connectToServer(), convertTSFunction(), create_cursor(), CreateReplicationSlot(), createViewAsClause(), dblink_close(), dblink_exec(), dblink_fetch(), dblink_open(), dblink_res_error(), deallocate_one(), deallocate_query(), 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(), dumpToastCompression(), 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_extension_name_patterns(), expand_foreign_server_name_patterns(), expand_schema_name_patterns(), expand_table_name_patterns(), fail_lo_xact(), fetch_more_data(), findLastBuiltinOid_V71(), finish_lo_xact(), get_create_object_cmd(), get_db_infos(), get_language_name(), get_loadable_libraries(), get_next_possible_free_pg_type_oid(), 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(), GetTableInfo(), getTables(), getTransforms(), getTriggers(), getTSConfigurations(), getTSDictionaries(), getTSParsers(), getTSTemplates(), getTypes(), handleCopyIn(), HandleEndOfCopyStream(), init_libpq_conn(), initGenerateDataClientSide(), libpq_fetch_file(), libpq_traverse_files(), libpqrcv_connect(), 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(), listExtendedStats(), listExtensionContents(), listExtensions(), listForeignDataWrappers(), listForeignServers(), listForeignTables(), listLanguages(), listOneExtensionContents(), listOperatorClasses(), listOperatorFamilies(), listOpFamilyFunctions(), listOpFamilyOperators(), 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_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(), pqEndcopy3(), PQexecFinish(), PQexecStart(), pqGetErrorNotice3(), pqInternalNotice(), PQmakeEmptyPGresult(), pqRowProcessor(), PQsetClientEncoding(), prepare_common(), prepare_foreign_modify(), process_queued_fetch_requests(), processExtensionTables(), processQueryResult(), ProcessResult(), PSQLexecWatch(), readCommandResponse(), ReceiveCopyData(), ReceiveXlogStream(), 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(), TableCommandResultHandler(), test_multi_pipelines(), test_pipeline_abort(), test_pipelined_insert(), test_prepared(), test_simple_pipeline(), test_singlerowmode(), test_transaction(), try_complete_step(), tryExecuteStatement(), vacuum_all_databases(), vacuum_one_database(), and vacuumlo().

681 {
682  PGresult_data *block;
683  int i;
684 
685  if (!res)
686  return;
687 
688  for (i = 0; i < res->nEvents; i++)
689  {
690  /* only send DESTROY to successfully-initialized event procs */
691  if (res->events[i].resultInitialized)
692  {
694 
695  evt.result = res;
696  (void) res->events[i].proc(PGEVT_RESULTDESTROY, &evt,
697  res->events[i].passThrough);
698  }
699  free(res->events[i].name);
700  }
701 
702  if (res->events)
703  free(res->events);
704 
705  /* Free all the subsidiary blocks */
706  while ((block = res->curBlock) != NULL)
707  {
708  res->curBlock = block->next;
709  free(block);
710  }
711 
712  /* Free the top-level tuple pointer array */
713  if (res->tuples)
714  free(res->tuples);
715 
716  /* zero out the pointer fields to catch programming errors */
717  res->attDescs = NULL;
718  res->tuples = NULL;
719  res->paramDescs = NULL;
720  res->errFields = NULL;
721  res->events = NULL;
722  res->nEvents = 0;
723  /* res->curBlock was zeroed out earlier */
724 
725  /* Free the PGresult structure itself */
726  free(res);
727 }
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 3438 of file fe-exec.c.

References pg_result::cmdStatus.

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

3439 {
3440  if (!res)
3441  return NULL;
3442  return res->cmdStatus;
3443 }
char cmdStatus[CMDSTATUS_LEN]
Definition: libpq-int.h:178

◆ PQcmdTuples()

char* PQcmdTuples ( PGresult res)

Definition at line 3508 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().

3509 {
3510  char *p,
3511  *c;
3512 
3513  if (!res)
3514  return "";
3515 
3516  if (strncmp(res->cmdStatus, "INSERT ", 7) == 0)
3517  {
3518  p = res->cmdStatus + 7;
3519  /* INSERT: skip oid and space */
3520  while (*p && *p != ' ')
3521  p++;
3522  if (*p == 0)
3523  goto interpret_error; /* no space? */
3524  p++;
3525  }
3526  else if (strncmp(res->cmdStatus, "SELECT ", 7) == 0 ||
3527  strncmp(res->cmdStatus, "DELETE ", 7) == 0 ||
3528  strncmp(res->cmdStatus, "UPDATE ", 7) == 0)
3529  p = res->cmdStatus + 7;
3530  else if (strncmp(res->cmdStatus, "FETCH ", 6) == 0)
3531  p = res->cmdStatus + 6;
3532  else if (strncmp(res->cmdStatus, "MOVE ", 5) == 0 ||
3533  strncmp(res->cmdStatus, "COPY ", 5) == 0)
3534  p = res->cmdStatus + 5;
3535  else
3536  return "";
3537 
3538  /* check that we have an integer (at least one digit, nothing else) */
3539  for (c = p; *c; c++)
3540  {
3541  if (!isdigit((unsigned char) *c))
3542  goto interpret_error;
3543  }
3544  if (c == p)
3545  goto interpret_error;
3546 
3547  return p;
3548 
3549 interpret_error:
3551  "could not interpret result from server: %s",
3552  res->cmdStatus);
3553  return "";
3554 }
PGNoticeHooks noticeHooks
Definition: libpq-int.h:186
char * c
void pqInternalNotice(const PGNoticeHooks *hooks, const char *fmt,...)
Definition: fe-exec.c:825
char cmdStatus[CMDSTATUS_LEN]
Definition: libpq-int.h:178

◆ PQconndefaults()

PQconninfoOption* PQconndefaults ( void  )

Definition at line 1477 of file fe-connect.c.

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

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

1478 {
1479  PQExpBufferData errorBuf;
1480  PQconninfoOption *connOptions;
1481 
1482  /* We don't actually report any errors here, but callees want a buffer */
1483  initPQExpBuffer(&errorBuf);
1484  if (PQExpBufferDataBroken(errorBuf))
1485  return NULL; /* out of memory already :-( */
1486 
1487  connOptions = conninfo_init(&errorBuf);
1488  if (connOptions != NULL)
1489  {
1490  /* pass NULL errorBuf to ignore errors */
1491  if (!conninfo_add_defaults(connOptions, NULL))
1492  {
1493  PQconninfoFree(connOptions);
1494  connOptions = NULL;
1495  }
1496  }
1497 
1498  termPQExpBuffer(&errorBuf);
1499  return connOptions;
1500 }
void termPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:131
static PQconninfoOption * conninfo_init(PQExpBuffer errorMessage)
Definition: fe-connect.c:5342
void PQconninfoFree(PQconninfoOption *connOptions)
Definition: fe-connect.c:6555
#define PQExpBufferDataBroken(buf)
Definition: pqexpbuffer.h:67
static bool conninfo_add_defaults(PQconninfoOption *options, PQExpBuffer errorMessage)
Definition: fe-connect.c:5778
void initPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:92

◆ PQconnectdb()

PGconn* PQconnectdb ( const char *  conninfo)

Definition at line 718 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(), and main().

719 {
720  PGconn *conn = PQconnectStart(conninfo);
721 
722  if (conn && conn->status != CONNECTION_BAD)
723  (void) connectDBComplete(conn);
724 
725  return conn;
726 }
PGconn * conn
Definition: streamutil.c:54
static int connectDBComplete(PGconn *conn)
Definition: fe-connect.c:2110
PGconn * PQconnectStart(const char *conninfo)
Definition: fe-connect.c:846
ConnStatusType status
Definition: libpq-int.h:409

◆ PQconnectdbParams()

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

Definition at line 662 of file fe-connect.c.

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

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

665 {
666  PGconn *conn = PQconnectStartParams(keywords, values, expand_dbname);
667 
668  if (conn && conn->status != CONNECTION_BAD)
669  (void) connectDBComplete(conn);
670 
671  return conn;
672 
673 }
PGconn * conn
Definition: streamutil.c:54
static int connectDBComplete(PGconn *conn)
Definition: fe-connect.c:2110
ConnStatusType status
Definition: libpq-int.h:409
static Datum values[MAXATTR]
Definition: bootstrap.c:166
PGconn * PQconnectStartParams(const char *const *keywords, const char *const *values, int expand_dbname)
Definition: fe-connect.c:765

◆ PQconnectionNeedsPassword()

int PQconnectionNeedsPassword ( const PGconn conn)

Definition at line 6770 of file fe-connect.c.

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

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

6771 {
6772  char *password;
6773 
6774  if (!conn)
6775  return false;
6776  password = PQpass(conn);
6777  if (conn->password_needed &&
6778  (password == NULL || password[0] == '\0'))
6779  return true;
6780  else
6781  return false;
6782 }
bool password_needed
Definition: libpq-int.h:450
char * PQpass(const PGconn *conn)
Definition: fe-connect.c:6589
static char * password
Definition: streamutil.c:53

◆ PQconnectionUsedPassword()

int PQconnectionUsedPassword ( const PGconn conn)

Definition at line 6785 of file fe-connect.c.

References pg_conn::password_needed.

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

6786 {
6787  if (!conn)
6788  return false;
6789  if (conn->password_needed)
6790  return true;
6791  else
6792  return false;
6793 }
bool password_needed
Definition: libpq-int.h:450

◆ PQconnectPoll()

PostgresPollingStatusType PQconnectPoll ( PGconn conn)

Definition at line 2246 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_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_STANDBY, CONNECTION_CHECK_TARGET, CONNECTION_CHECK_WRITABLE, CONNECTION_CONSUME, CONNECTION_GSS_STARTUP, CONNECTION_MADE, CONNECTION_NEEDED, CONNECTION_OK, CONNECTION_SSL_STARTUP, CONNECTION_STARTED, connectNoDelay(), pg_conn::connhost, pg_conn::connip, PQExpBufferData::data, pg_conn::default_transaction_read_only, EINPROGRESS, EINTR, emitHostIdentityInfo(), ERRCODE_APPNAME_UNKNOWN, ERRCODE_CANNOT_CONNECT_NOW, 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::in_hot_standby, pg_conn::inCursor, pg_conn::inEnd, pg_conn::inStart, IS_AF_UNIX, pg_conn::laddr, pg_conn::last_sqlstate, PQExpBufferData::len, libpq_gettext, MAXPGPATH, MemSet, pg_conn::nconnhost, NEGOTIATE_GSS_CODE, NEGOTIATE_SSL_CODE, NI_MAXHOST, parse_int_param(), PG_BOOL_NO, PG_BOOL_UNKNOWN, PG_BOOL_YES, PG_DIAG_SQLSTATE, pg_fe_sendauth(), pg_getaddrinfo_all(), pg_GSS_have_cred_cache(), pg_hton32, PG_PROTOCOL, 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::pipelineStatus, pg_conn_host::port, PQ_PIPELINE_OFF, 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(), PQsendQueryContinue(), PQTRANS_IDLE, pg_conn::pversion, pg_conn::raddr, release_conn_addrinfo(), pg_conn::requirepeer, pg_result::resultStatus, SockAddr::salen, pg_conn::send_appname, sendTerminateConn(), SERVER_TYPE_PREFER_STANDBY, SERVER_TYPE_PREFER_STANDBY_PASS2, SERVER_TYPE_PRIMARY, SERVER_TYPE_READ_ONLY, SERVER_TYPE_READ_WRITE, SERVER_TYPE_STANDBY, 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_server_type, 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().

2247 {
2248  bool reset_connection_state_machine = false;
2249  bool need_new_connection = false;
2250  PGresult *res;
2251  char sebuf[PG_STRERROR_R_BUFLEN];
2252  int optval;
2253 
2254  if (conn == NULL)
2255  return PGRES_POLLING_FAILED;
2256 
2257  /* Get the new data */
2258  switch (conn->status)
2259  {
2260  /*
2261  * We really shouldn't have been polled in these two cases, but we
2262  * can handle it.
2263  */
2264  case CONNECTION_BAD:
2265  return PGRES_POLLING_FAILED;
2266  case CONNECTION_OK:
2267  return PGRES_POLLING_OK;
2268 
2269  /* These are reading states */
2271  case CONNECTION_AUTH_OK:
2273  case CONNECTION_CONSUME:
2275  {
2276  /* Load waiting data */
2277  int n = pqReadData(conn);
2278 
2279  if (n < 0)
2280  goto error_return;
2281  if (n == 0)
2282  return PGRES_POLLING_READING;
2283 
2284  break;
2285  }
2286 
2287  /* These are writing states, so we just proceed. */
2288  case CONNECTION_STARTED:
2289  case CONNECTION_MADE:
2290  break;
2291 
2292  /* Special cases: proceed without waiting. */
2294  case CONNECTION_NEEDED:
2297  break;
2298 
2299  default:
2301  libpq_gettext("invalid connection state, probably indicative of memory corruption\n"));
2302  goto error_return;
2303  }
2304 
2305 
2306 keep_going: /* We will come back to here until there is
2307  * nothing left to do. */
2308 
2309  /* Time to advance to next address, or next host if no more addresses? */
2310  if (conn->try_next_addr)
2311  {
2312  if (conn->addr_cur && conn->addr_cur->ai_next)
2313  {
2314  conn->addr_cur = conn->addr_cur->ai_next;
2315  reset_connection_state_machine = true;
2316  }
2317  else
2318  conn->try_next_host = true;
2319  conn->try_next_addr = false;
2320  }
2321 
2322  /* Time to advance to next connhost[] entry? */
2323  if (conn->try_next_host)
2324  {
2325  pg_conn_host *ch;
2326  struct addrinfo hint;
2327  int thisport;
2328  int ret;
2329  char portstr[MAXPGPATH];
2330 
2331  if (conn->whichhost + 1 < conn->nconnhost)
2332  conn->whichhost++;
2333  else
2334  {
2335  /*
2336  * Oops, no more hosts.
2337  *
2338  * If we are trying to connect in "prefer-standby" mode, then drop
2339  * the standby requirement and start over.
2340  *
2341  * Otherwise, an appropriate error message is already set up, so
2342  * we just need to set the right status.
2343  */
2345  conn->nconnhost > 0)
2346  {
2348  conn->whichhost = 0;
2349  }
2350  else
2351  goto error_return;
2352  }
2353 
2354  /* Drop any address info for previous host */
2355  release_conn_addrinfo(conn);
2356 
2357  /*
2358  * Look up info for the new host. On failure, log the problem in
2359  * conn->errorMessage, then loop around to try the next host. (Note
2360  * we don't clear try_next_host until we've succeeded.)
2361  */
2362  ch = &conn->connhost[conn->whichhost];
2363 
2364  /* Initialize hint structure */
2365  MemSet(&hint, 0, sizeof(hint));
2366  hint.ai_socktype = SOCK_STREAM;
2367  conn->addrlist_family = hint.ai_family = AF_UNSPEC;
2368 
2369  /* Figure out the port number we're going to use. */
2370  if (ch->port == NULL || ch->port[0] == '\0')
2371  thisport = DEF_PGPORT;
2372  else
2373  {
2374  if (!parse_int_param(ch->port, &thisport, conn, "port"))
2375  goto error_return;
2376 
2377  if (thisport < 1 || thisport > 65535)
2378  {
2380  libpq_gettext("invalid port number: \"%s\"\n"),
2381  ch->port);
2382  goto keep_going;
2383  }
2384  }
2385  snprintf(portstr, sizeof(portstr), "%d", thisport);
2386 
2387  /* Use pg_getaddrinfo_all() to resolve the address */
2388  switch (ch->type)
2389  {
2390  case CHT_HOST_NAME:
2391  ret = pg_getaddrinfo_all(ch->host, portstr, &hint,
2392  &conn->addrlist);
2393  if (ret || !conn->addrlist)
2394  {
2396  libpq_gettext("could not translate host name \"%s\" to address: %s\n"),
2397  ch->host, gai_strerror(ret));
2398  goto keep_going;
2399  }
2400  break;
2401 
2402  case CHT_HOST_ADDRESS:
2403  hint.ai_flags = AI_NUMERICHOST;
2404  ret = pg_getaddrinfo_all(ch->hostaddr, portstr, &hint,
2405  &conn->addrlist);
2406  if (ret || !conn->addrlist)
2407  {
2409  libpq_gettext("could not parse network address \"%s\": %s\n"),
2410  ch->hostaddr, gai_strerror(ret));
2411  goto keep_going;
2412  }
2413  break;
2414 
2415  case CHT_UNIX_SOCKET:
2416 #ifdef HAVE_UNIX_SOCKETS
2417  conn->addrlist_family = hint.ai_family = AF_UNIX;
2418  UNIXSOCK_PATH(portstr, thisport, ch->host);
2419  if (strlen(portstr) >= UNIXSOCK_PATH_BUFLEN)
2420  {
2422  libpq_gettext("Unix-domain socket path \"%s\" is too long (maximum %d bytes)\n"),
2423  portstr,
2424  (int) (UNIXSOCK_PATH_BUFLEN - 1));
2425  goto keep_going;
2426  }
2427 
2428  /*
2429  * NULL hostname tells pg_getaddrinfo_all to parse the service
2430  * name as a Unix-domain socket path.
2431  */
2432  ret = pg_getaddrinfo_all(NULL, portstr, &hint,
2433  &conn->addrlist);
2434  if (ret || !conn->addrlist)
2435  {
2437  libpq_gettext("could not translate Unix-domain socket path \"%s\" to address: %s\n"),
2438  portstr, gai_strerror(ret));
2439  goto keep_going;
2440  }
2441 #else
2442  Assert(false);
2443 #endif
2444  break;
2445  }
2446 
2447  /* OK, scan this addrlist for a working server address */
2448  conn->addr_cur = conn->addrlist;
2449  reset_connection_state_machine = true;
2450  conn->try_next_host = false;
2451  }
2452 
2453  /* Reset connection state machine? */
2454  if (reset_connection_state_machine)
2455  {
2456  /*
2457  * (Re) initialize our connection control variables for a set of
2458  * connection attempts to a single server address. These variables
2459  * must persist across individual connection attempts, but we must
2460  * reset them when we start to consider a new server.
2461  */
2462  conn->pversion = PG_PROTOCOL(3, 0);
2463  conn->send_appname = true;
2464 #ifdef USE_SSL
2465  /* initialize these values based on SSL mode */
2466  conn->allow_ssl_try = (conn->sslmode[0] != 'd'); /* "disable" */
2467  conn->wait_ssl_try = (conn->sslmode[0] == 'a'); /* "allow" */
2468 #endif
2469 #ifdef ENABLE_GSS
2470  conn->try_gss = (conn->gssencmode[0] != 'd'); /* "disable" */
2471 #endif
2472 
2473  reset_connection_state_machine = false;
2474  need_new_connection = true;
2475  }
2476 
2477  /* Force a new connection (perhaps to the same server as before)? */
2478  if (need_new_connection)
2479  {
2480  /* Drop any existing connection */
2481  pqDropConnection(conn, true);
2482 
2483  /* Reset all state obtained from old server */
2484  pqDropServerData(conn);
2485 
2486  /* Drop any PGresult we might have, too */
2487  conn->asyncStatus = PGASYNC_IDLE;
2488  conn->xactStatus = PQTRANS_IDLE;
2490  pqClearAsyncResult(conn);
2491 
2492  /* Reset conn->status to put the state machine in the right state */
2493  conn->status = CONNECTION_NEEDED;
2494 
2495  need_new_connection = false;
2496  }
2497 
2498  /* Now try to advance the state machine for this connection */
2499  switch (conn->status)
2500  {
2501  case CONNECTION_NEEDED:
2502  {
2503  /*
2504  * Try to initiate a connection to one of the addresses
2505  * returned by pg_getaddrinfo_all(). conn->addr_cur is the
2506  * next one to try.
2507  *
2508  * The extra level of braces here is historical. It's not
2509  * worth reindenting this whole switch case to remove 'em.
2510  */
2511  {
2512  struct addrinfo *addr_cur = conn->addr_cur;
2513  char host_addr[NI_MAXHOST];
2514 
2515  /*
2516  * Advance to next possible host, if we've tried all of
2517  * the addresses for the current host.
2518  */
2519  if (addr_cur == NULL)
2520  {
2521  conn->try_next_host = true;
2522  goto keep_going;
2523  }
2524 
2525  /* Remember current address for possible use later */
2526  memcpy(&conn->raddr.addr, addr_cur->ai_addr,
2527  addr_cur->ai_addrlen);
2528  conn->raddr.salen = addr_cur->ai_addrlen;
2529 
2530  /*
2531  * Set connip, too. Note we purposely ignore strdup
2532  * failure; not a big problem if it fails.
2533  */
2534  if (conn->connip != NULL)
2535  {
2536  free(conn->connip);
2537  conn->connip = NULL;
2538  }
2539  getHostaddr(conn, host_addr, NI_MAXHOST);
2540  if (host_addr[0])
2541  conn->connip = strdup(host_addr);
2542 
2543  /* Try to create the socket */
2544  conn->sock = socket(addr_cur->ai_family, SOCK_STREAM, 0);
2545  if (conn->sock == PGINVALID_SOCKET)
2546  {
2547  int errorno = SOCK_ERRNO;
2548 
2549  /*
2550  * Silently ignore socket() failure if we have more
2551  * addresses to try; this reduces useless chatter in
2552  * cases where the address list includes both IPv4 and
2553  * IPv6 but kernel only accepts one family.
2554  */
2555  if (addr_cur->ai_next != NULL ||
2556  conn->whichhost + 1 < conn->nconnhost)
2557  {
2558  conn->try_next_addr = true;
2559  goto keep_going;
2560  }
2561  emitHostIdentityInfo(conn, host_addr);
2563  libpq_gettext("could not create socket: %s\n"),
2564  SOCK_STRERROR(errorno, sebuf, sizeof(sebuf)));
2565  goto error_return;
2566  }
2567 
2568  /*
2569  * Once we've identified a target address, all errors
2570  * except the preceding socket()-failure case should be
2571  * prefixed with host-identity information. (If the
2572  * connection succeeds, the contents of conn->errorMessage
2573  * won't matter, so this is harmless.)
2574  */
2575  emitHostIdentityInfo(conn, host_addr);
2576 
2577  /*
2578  * Select socket options: no delay of outgoing data for
2579  * TCP sockets, nonblock mode, close-on-exec. Try the
2580  * next address if any of this fails.
2581  */
2582  if (!IS_AF_UNIX(addr_cur->ai_family))
2583  {
2584  if (!connectNoDelay(conn))
2585  {
2586  /* error message already created */
2587  conn->try_next_addr = true;
2588  goto keep_going;
2589  }
2590  }
2591  if (!pg_set_noblock(conn->sock))
2592  {
2594  libpq_gettext("could not set socket to nonblocking mode: %s\n"),
2595  SOCK_STRERROR(SOCK_ERRNO, sebuf, sizeof(sebuf)));
2596  conn->try_next_addr = true;
2597  goto keep_going;
2598  }
2599 
2600 #ifdef F_SETFD
2601  if (fcntl(conn->sock, F_SETFD, FD_CLOEXEC) == -1)
2602  {
2604  libpq_gettext("could not set socket to close-on-exec mode: %s\n"),
2605  SOCK_STRERROR(SOCK_ERRNO, sebuf, sizeof(sebuf)));
2606  conn->try_next_addr = true;
2607  goto keep_going;
2608  }
2609 #endif /* F_SETFD */
2610 
2611  if (!IS_AF_UNIX(addr_cur->ai_family))
2612  {
2613 #ifndef WIN32
2614  int on = 1;
2615 #endif
2616  int usekeepalives = useKeepalives(conn);
2617  int err = 0;
2618 
2619  if (usekeepalives < 0)
2620  {
2622  libpq_gettext("keepalives parameter must be an integer\n"));
2623  err = 1;
2624  }
2625  else if (usekeepalives == 0)
2626  {
2627  /* Do nothing */
2628  }
2629 #ifndef WIN32
2630  else if (setsockopt(conn->sock,
2631  SOL_SOCKET, SO_KEEPALIVE,
2632  (char *) &on, sizeof(on)) < 0)
2633  {
2635  libpq_gettext("setsockopt(%s) failed: %s\n"),
2636  "SO_KEEPALIVE",
2637  SOCK_STRERROR(SOCK_ERRNO, sebuf, sizeof(sebuf)));
2638  err = 1;
2639  }
2640  else if (!setKeepalivesIdle(conn)
2641  || !setKeepalivesInterval(conn)
2642  || !setKeepalivesCount(conn))
2643  err = 1;
2644 #else /* WIN32 */
2645 #ifdef SIO_KEEPALIVE_VALS
2646  else if (!setKeepalivesWin32(conn))
2647  err = 1;
2648 #endif /* SIO_KEEPALIVE_VALS */
2649 #endif /* WIN32 */
2650  else if (!setTCPUserTimeout(conn))
2651  err = 1;
2652 
2653  if (err)
2654  {
2655  conn->try_next_addr = true;
2656  goto keep_going;
2657  }
2658  }
2659 
2660  /*----------
2661  * We have three methods of blocking SIGPIPE during
2662  * send() calls to this socket:
2663  *
2664  * - setsockopt(sock, SO_NOSIGPIPE)
2665  * - send(sock, ..., MSG_NOSIGNAL)
2666  * - setting the signal mask to SIG_IGN during send()
2667  *
2668  * The third method requires three syscalls per send,
2669  * so we prefer either of the first two, but they are
2670  * less portable. The state is tracked in the following
2671  * members of PGconn:
2672  *
2673  * conn->sigpipe_so - we have set up SO_NOSIGPIPE
2674  * conn->sigpipe_flag - we're specifying MSG_NOSIGNAL
2675  *
2676  * If we can use SO_NOSIGPIPE, then set sigpipe_so here
2677  * and we're done. Otherwise, set sigpipe_flag so that
2678  * we will try MSG_NOSIGNAL on sends. If we get an error
2679  * with MSG_NOSIGNAL, we'll clear that flag and revert to
2680  * signal masking.
2681  *----------
2682  */
2683  conn->sigpipe_so = false;
2684 #ifdef MSG_NOSIGNAL
2685  conn->sigpipe_flag = true;
2686 #else
2687  conn->sigpipe_flag = false;
2688 #endif /* MSG_NOSIGNAL */
2689 
2690 #ifdef SO_NOSIGPIPE
2691  optval = 1;
2692  if (setsockopt(conn->sock, SOL_SOCKET, SO_NOSIGPIPE,
2693  (char *) &optval, sizeof(optval)) == 0)
2694  {
2695  conn->sigpipe_so = true;
2696  conn->sigpipe_flag = false;
2697  }
2698 #endif /* SO_NOSIGPIPE */
2699 
2700  /*
2701  * Start/make connection. This should not block, since we
2702  * are in nonblock mode. If it does, well, too bad.
2703  */
2704  if (connect(conn->sock, addr_cur->ai_addr,
2705  addr_cur->ai_addrlen) < 0)
2706  {
2707  if (SOCK_ERRNO == EINPROGRESS ||
2708 #ifdef WIN32
2709  SOCK_ERRNO == EWOULDBLOCK ||
2710 #endif
2711  SOCK_ERRNO == EINTR)
2712  {
2713  /*
2714  * This is fine - we're in non-blocking mode, and
2715  * the connection is in progress. Tell caller to
2716  * wait for write-ready on socket.
2717  */
2718  conn->status = CONNECTION_STARTED;
2719  return PGRES_POLLING_WRITING;
2720  }
2721  /* otherwise, trouble */
2722  }
2723  else
2724  {
2725  /*
2726  * Hm, we're connected already --- seems the "nonblock
2727  * connection" wasn't. Advance the state machine and
2728  * go do the next stuff.
2729  */
2730  conn->status = CONNECTION_STARTED;
2731  goto keep_going;
2732  }
2733 
2734  /*
2735  * This connection failed. Add the error report to
2736  * conn->errorMessage, then try the next address if any.
2737  */
2739  conn->try_next_addr = true;
2740  goto keep_going;
2741  }
2742  }
2743 
2744  case CONNECTION_STARTED:
2745  {
2746  ACCEPT_TYPE_ARG3 optlen = sizeof(optval);
2747 
2748  /*
2749  * Write ready, since we've made it here, so the connection
2750  * has been made ... or has failed.
2751  */
2752 
2753  /*
2754  * Now check (using getsockopt) that there is not an error
2755  * state waiting for us on the socket.
2756  */
2757 
2758  if (getsockopt(conn->sock, SOL_SOCKET, SO_ERROR,
2759  (char *) &optval, &optlen) == -1)
2760  {
2762  libpq_gettext("could not get socket error status: %s\n"),
2763  SOCK_STRERROR(SOCK_ERRNO, sebuf, sizeof(sebuf)));
2764  goto error_return;
2765  }
2766  else if (optval != 0)
2767  {
2768  /*
2769  * When using a nonblocking connect, we will typically see
2770  * connect failures at this point, so provide a friendly
2771  * error message.
2772  */
2773  connectFailureMessage(conn, optval);
2774 
2775  /*
2776  * Try the next address if any, just as in the case where
2777  * connect() returned failure immediately.
2778  */
2779  conn->try_next_addr = true;
2780  goto keep_going;
2781  }
2782 
2783  /* Fill in the client address */
2784  conn->laddr.salen = sizeof(conn->laddr.addr);
2785  if (getsockname(conn->sock,
2786  (struct sockaddr *) &conn->laddr.addr,
2787  &conn->laddr.salen) < 0)
2788  {
2790  libpq_gettext("could not get client address from socket: %s\n"),
2791  SOCK_STRERROR(SOCK_ERRNO, sebuf, sizeof(sebuf)));
2792  goto error_return;
2793  }
2794 
2795  /*
2796  * Make sure we can write before advancing to next step.
2797  */
2798  conn->status = CONNECTION_MADE;
2799  return PGRES_POLLING_WRITING;
2800  }
2801 
2802  case CONNECTION_MADE:
2803  {
2804  char *startpacket;
2805  int packetlen;
2806 
2807  /*
2808  * Implement requirepeer check, if requested and it's a
2809  * Unix-domain socket.
2810  */
2811  if (conn->requirepeer && conn->requirepeer[0] &&
2812  IS_AF_UNIX(conn->raddr.addr.ss_family))
2813  {
2814 #ifndef WIN32
2815  char pwdbuf[BUFSIZ];
2816  struct passwd pass_buf;
2817  struct passwd *pass;
2818  int passerr;
2819 #endif
2820  uid_t uid;
2821  gid_t gid;
2822 
2823  errno = 0;
2824  if (getpeereid(conn->sock, &uid, &gid) != 0)
2825  {
2826  /*
2827  * Provide special error message if getpeereid is a
2828  * stub
2829  */
2830  if (errno == ENOSYS)
2832  libpq_gettext("requirepeer parameter is not supported on this platform\n"));
2833  else
2835  libpq_gettext("could not get peer credentials: %s\n"),
2836  strerror_r(errno, sebuf, sizeof(sebuf)));
2837  goto error_return;
2838  }
2839 
2840 #ifndef WIN32
2841  passerr = pqGetpwuid(uid, &pass_buf, pwdbuf, sizeof(pwdbuf), &pass);
2842  if (pass == NULL)
2843  {
2844  if (passerr != 0)
2846  libpq_gettext("could not look up local user ID %d: %s\n"),
2847  (int) uid,
2848  strerror_r(passerr, sebuf, sizeof(sebuf)));
2849  else
2851  libpq_gettext("local user with ID %d does not exist\n"),
2852  (int) uid);
2853  goto error_return;
2854  }
2855 
2856  if (strcmp(pass->pw_name, conn->requirepeer) != 0)
2857  {
2859  libpq_gettext("requirepeer specifies \"%s\", but actual peer user name is \"%s\"\n"),
2860  conn->requirepeer, pass->pw_name);
2861  goto error_return;
2862  }
2863 #else /* WIN32 */
2864  /* should have failed with ENOSYS above */
2865  Assert(false);
2866 #endif /* WIN32 */
2867  }
2868 
2869  if (IS_AF_UNIX(conn->raddr.addr.ss_family))
2870  {
2871  /* Don't request SSL or GSSAPI over Unix sockets */
2872 #ifdef USE_SSL
2873  conn->allow_ssl_try = false;
2874 #endif
2875 #ifdef ENABLE_GSS
2876  conn->try_gss = false;
2877 #endif
2878  }
2879 
2880 #ifdef ENABLE_GSS
2881 
2882  /*
2883  * If GSSAPI encryption is enabled, then call
2884  * pg_GSS_have_cred_cache() which will return true if we can
2885  * acquire credentials (and give us a handle to use in
2886  * conn->gcred), and then send a packet to the server asking
2887  * for GSSAPI Encryption (and skip past SSL negotiation and
2888  * regular startup below).
2889  */
2890  if (conn->try_gss && !conn->gctx)
2891  conn->try_gss = pg_GSS_have_cred_cache(&conn->gcred);
2892  if (conn->try_gss && !conn->gctx)
2893  {
2895 
2896  if (pqPacketSend(conn, 0, &pv, sizeof(pv)) != STATUS_OK)
2897  {
2899  libpq_gettext("could not send GSSAPI negotiation packet: %s\n"),
2900  SOCK_STRERROR(SOCK_ERRNO, sebuf, sizeof(sebuf)));
2901  goto error_return;
2902  }
2903 
2904  /* Ok, wait for response */
2906  return PGRES_POLLING_READING;
2907  }
2908  else if (!conn->gctx && conn->gssencmode[0] == 'r')
2909  {
2911  libpq_gettext("GSSAPI encryption required but was impossible (possibly no credential cache, no server support, or using a local socket)\n"));
2912  goto error_return;
2913  }
2914 #endif
2915 
2916 #ifdef USE_SSL
2917 
2918  /*
2919  * Enable the libcrypto callbacks before checking if SSL needs
2920  * to be done. This is done before sending the startup packet
2921  * as depending on the type of authentication done, like MD5
2922  * or SCRAM that use cryptohashes, the callbacks would be
2923  * required even without a SSL connection
2924  */
2925  if (pqsecure_initialize(conn, false, true) < 0)
2926  goto error_return;
2927 
2928  /*
2929  * If SSL is enabled and we haven't already got encryption of
2930  * some sort running, request SSL instead of sending the
2931  * startup message.
2932  */
2933  if (conn->allow_ssl_try && !conn->wait_ssl_try &&
2934  !conn->ssl_in_use
2935 #ifdef ENABLE_GSS
2936  && !conn->gssenc
2937 #endif
2938  )
2939  {
2940  ProtocolVersion pv;
2941 
2942  /*
2943  * Send the SSL request packet.
2944  *
2945  * Theoretically, this could block, but it really
2946  * shouldn't since we only got here if the socket is
2947  * write-ready.
2948  */
2950  if (pqPacketSend(conn, 0, &pv, sizeof(pv)) != STATUS_OK)
2951  {
2953  libpq_gettext("could not send SSL negotiation packet: %s\n"),
2954  SOCK_STRERROR(SOCK_ERRNO, sebuf, sizeof(sebuf)));
2955  goto error_return;
2956  }
2957  /* Ok, wait for response */
2959  return PGRES_POLLING_READING;
2960  }
2961 #endif /* USE_SSL */
2962 
2963  /*
2964  * Build the startup packet.
2965  */
2966  startpacket = pqBuildStartupPacket3(conn, &packetlen,
2968  if (!startpacket)
2969  {
2971  libpq_gettext("out of memory\n"));
2972  goto error_return;
2973  }
2974 
2975  /*
2976  * Send the startup packet.
2977  *
2978  * Theoretically, this could block, but it really shouldn't
2979  * since we only got here if the socket is write-ready.
2980  */
2981  if (pqPacketSend(conn, 0, startpacket, packetlen) != STATUS_OK)
2982  {
2984  libpq_gettext("could not send startup packet: %s\n"),
2985  SOCK_STRERROR(SOCK_ERRNO, sebuf, sizeof(sebuf)));
2986  free(startpacket);
2987  goto error_return;
2988  }
2989 
2990  free(startpacket);
2991 
2993  return PGRES_POLLING_READING;
2994  }
2995 
2996  /*
2997  * Handle SSL negotiation: wait for postmaster messages and
2998  * respond as necessary.
2999  */
3001  {
3002 #ifdef USE_SSL
3003  PostgresPollingStatusType pollres;
3004 
3005  /*
3006  * On first time through, get the postmaster's response to our
3007  * SSL negotiation packet.
3008  */
3009  if (!conn->ssl_in_use)
3010  {
3011  /*
3012  * We use pqReadData here since it has the logic to
3013  * distinguish no-data-yet from connection closure. Since
3014  * conn->ssl isn't set, a plain recv() will occur.
3015  */
3016  char SSLok;
3017  int rdresult;
3018 
3019  rdresult = pqReadData(conn);
3020  if (rdresult < 0)
3021  {
3022  /* errorMessage is already filled in */
3023  goto error_return;
3024  }
3025  if (rdresult == 0)
3026  {
3027  /* caller failed to wait for data */
3028  return PGRES_POLLING_READING;
3029  }
3030  if (pqGetc(&SSLok, conn) < 0)
3031  {
3032  /* should not happen really */
3033  return PGRES_POLLING_READING;
3034  }
3035  if (SSLok == 'S')
3036  {
3037  /* mark byte consumed */
3038  conn->inStart = conn->inCursor;
3039 
3040  /*
3041  * Set up global SSL state if required. The crypto
3042  * state has already been set if libpq took care of
3043  * doing that, so there is no need to make that happen
3044  * again.
3045  */
3046  if (pqsecure_initialize(conn, true, false) != 0)
3047  goto error_return;
3048  }
3049  else if (SSLok == 'N')
3050  {
3051  /* mark byte consumed */
3052  conn->inStart = conn->inCursor;
3053  /* OK to do without SSL? */
3054  if (conn->sslmode[0] == 'r' || /* "require" */
3055  conn->sslmode[0] == 'v') /* "verify-ca" or
3056  * "verify-full" */
3057  {
3058  /* Require SSL, but server does not want it */
3060  libpq_gettext("server does not support SSL, but SSL was required\n"));
3061  goto error_return;
3062  }
3063  /* Otherwise, proceed with normal startup */
3064  conn->allow_ssl_try = false;
3065  /* We can proceed using this connection */
3066  conn->status = CONNECTION_MADE;
3067  return PGRES_POLLING_WRITING;
3068  }
3069  else if (SSLok == 'E')
3070  {
3071  /*
3072  * Server failure of some sort, such as failure to
3073  * fork a backend process. We need to process and
3074  * report the error message, which might be formatted
3075  * according to either protocol 2 or protocol 3.
3076  * Rather than duplicate the code for that, we flip
3077  * into AWAITING_RESPONSE state and let the code there
3078  * deal with it. Note we have *not* consumed the "E"
3079  * byte here.
3080  */
3082  goto keep_going;
3083  }
3084  else
3085  {
3087  libpq_gettext("received invalid response to SSL negotiation: %c\n"),
3088  SSLok);
3089  goto error_return;
3090  }
3091  }
3092 
3093  /*
3094  * Begin or continue the SSL negotiation process.
3095  */
3096  pollres = pqsecure_open_client(conn);
3097  if (pollres == PGRES_POLLING_OK)
3098  {
3099  /* SSL handshake done, ready to send startup packet */
3100  conn->status = CONNECTION_MADE;
3101  return PGRES_POLLING_WRITING;
3102  }
3103  if (pollres == PGRES_POLLING_FAILED)
3104  {
3105  /*
3106  * Failed ... if sslmode is "prefer" then do a non-SSL
3107  * retry
3108  */
3109  if (conn->sslmode[0] == 'p' /* "prefer" */
3110  && conn->allow_ssl_try /* redundant? */
3111  && !conn->wait_ssl_try) /* redundant? */
3112  {
3113  /* only retry once */
3114  conn->allow_ssl_try = false;
3115  need_new_connection = true;
3116  goto keep_going;
3117  }
3118  /* Else it's a hard failure */
3119  goto error_return;
3120  }
3121  /* Else, return POLLING_READING or POLLING_WRITING status */
3122  return pollres;
3123 #else /* !USE_SSL */
3124  /* can't get here */
3125  goto error_return;
3126 #endif /* USE_SSL */
3127  }
3128 
3130  {
3131 #ifdef ENABLE_GSS
3132  PostgresPollingStatusType pollres;
3133 
3134  /*
3135  * If we haven't yet, get the postmaster's response to our
3136  * negotiation packet
3137  */
3138  if (conn->try_gss && !conn->gctx)
3139  {
3140  char gss_ok;
3141  int rdresult = pqReadData(conn);
3142 
3143  if (rdresult < 0)
3144  /* pqReadData fills in error message */
3145  goto error_return;
3146  else if (rdresult == 0)
3147  /* caller failed to wait for data */
3148  return PGRES_POLLING_READING;
3149  if (pqGetc(&gss_ok, conn) < 0)
3150  /* shouldn't happen... */
3151  return PGRES_POLLING_READING;
3152 
3153  if (gss_ok == 'E')
3154  {
3155  /*
3156  * Server failure of some sort. Assume it's a
3157  * protocol version support failure, and let's see if
3158  * we can't recover (if it's not, we'll get a better
3159  * error message on retry). Server gets fussy if we
3160  * don't hang up the socket, though.
3161  */
3162  conn->try_gss = false;
3163  need_new_connection = true;
3164  goto keep_going;
3165  }
3166 
3167  /* mark byte consumed */
3168  conn->inStart = conn->inCursor;
3169 
3170  if (gss_ok == 'N')
3171  {
3172  /* Server doesn't want GSSAPI; fall back if we can */
3173  if (conn->gssencmode[0] == 'r')
3174  {
3176  libpq_gettext("server doesn't support GSSAPI encryption, but it was required\n"));
3177  goto error_return;
3178  }
3179 
3180  conn->try_gss = false;
3181  /* We can proceed using this connection */
3182  conn->status = CONNECTION_MADE;
3183  return PGRES_POLLING_WRITING;
3184  }
3185  else if (gss_ok != 'G')
3186  {
3188  libpq_gettext("received invalid response to GSSAPI negotiation: %c\n"),
3189  gss_ok);
3190  goto error_return;
3191  }
3192  }
3193 
3194  /* Begin or continue GSSAPI negotiation */
3195  pollres = pqsecure_open_gss(conn);
3196  if (pollres == PGRES_POLLING_OK)
3197  {
3198  /* All set for startup packet */
3199  conn->status = CONNECTION_MADE;
3200  return PGRES_POLLING_WRITING;
3201  }
3202  else if (pollres == PGRES_POLLING_FAILED &&
3203  conn->gssencmode[0] == 'p')
3204  {
3205  /*
3206  * We failed, but we can retry on "prefer". Have to drop
3207  * the current connection to do so, though.
3208  */
3209  conn->try_gss = false;
3210  need_new_connection = true;
3211  goto keep_going;
3212  }
3213  return pollres;
3214 #else /* !ENABLE_GSS */
3215  /* unreachable */
3216  goto error_return;
3217 #endif /* ENABLE_GSS */
3218  }
3219 
3220  /*
3221  * Handle authentication exchange: wait for postmaster messages
3222  * and respond as necessary.
3223  */
3225  {
3226  char beresp;
3227  int msgLength;
3228  int avail;
3229  AuthRequest areq;
3230  int res;
3231 
3232  /*
3233  * Scan the message from current point (note that if we find
3234  * the message is incomplete, we will return without advancing
3235  * inStart, and resume here next time).
3236  */
3237  conn->inCursor = conn->inStart;
3238 
3239  /* Read type byte */
3240  if (pqGetc(&beresp, conn))
3241  {
3242  /* We'll come back when there is more data */
3243  return PGRES_POLLING_READING;
3244  }
3245 
3246  /*
3247  * Validate message type: we expect only an authentication
3248  * request or an error here. Anything else probably means
3249  * it's not Postgres on the other end at all.
3250  */
3251  if (!(beresp == 'R' || beresp == 'E'))
3252  {
3254  libpq_gettext("expected authentication request from server, but received %c\n"),
3255  beresp);
3256  goto error_return;
3257  }
3258 
3259  /* Read message length word */
3260  if (pqGetInt(&msgLength, 4, conn))
3261  {
3262  /* We'll come back when there is more data */
3263  return PGRES_POLLING_READING;
3264  }
3265 
3266  /*
3267  * Try to validate message length before using it.
3268  * Authentication requests can't be very large, although GSS
3269  * auth requests may not be that small. Errors can be a
3270  * little larger, but not huge. If we see a large apparent
3271  * length in an error, it means we're really talking to a
3272  * pre-3.0-protocol server; cope. (Before version 14, the
3273  * server also used the old protocol for errors that happened
3274  * before processing the startup packet.)
3275  */
3276  if (beresp == 'R' && (msgLength < 8 || msgLength > 2000))
3277  {
3279  libpq_gettext("expected authentication request from server, but received %c\n"),
3280  beresp);
3281  goto error_return;
3282  }
3283 
3284  if (beresp == 'E' && (msgLength < 8 || msgLength > 30000))
3285  {
3286  /* Handle error from a pre-3.0 server */
3287  conn->inCursor = conn->inStart + 1; /* reread data */
3288  if (pqGets_append(&conn->errorMessage, conn))
3289  {
3290  /* We'll come back when there is more data */
3291  return PGRES_POLLING_READING;
3292  }
3293  /* OK, we read the message; mark data consumed */
3294  conn->inStart = conn->inCursor;
3295 
3296  /*
3297  * Before 7.2, the postmaster didn't always end its
3298  * messages with a newline, so add one if needed to
3299  * conform to libpq conventions.
3300  */
3301  if (conn->errorMessage.len == 0 ||
3302  conn->errorMessage.data[conn->errorMessage.len - 1] != '\n')
3303  {
3304  appendPQExpBufferChar(&conn->errorMessage, '\n');
3305  }
3306 
3307  goto error_return;
3308  }
3309 
3310  /*
3311  * Can't process if message body isn't all here yet.
3312  */
3313  msgLength -= 4;
3314  avail = conn->inEnd - conn->inCursor;
3315  if (avail < msgLength)
3316  {
3317  /*
3318  * Before returning, try to enlarge the input buffer if
3319  * needed to hold the whole message; see notes in
3320  * pqParseInput3.
3321  */
3322  if (pqCheckInBufferSpace(conn->inCursor + (size_t) msgLength,
3323  conn))
3324  goto error_return;
3325  /* We'll come back when there is more data */
3326  return PGRES_POLLING_READING;
3327  }
3328 
3329  /* Handle errors. */
3330  if (beresp == 'E')
3331  {
3332  if (pqGetErrorNotice3(conn, true))
3333  {
3334  /* We'll come back when there is more data */
3335  return PGRES_POLLING_READING;
3336  }
3337  /* OK, we read the message; mark data consumed */
3338  conn->inStart = conn->inCursor;
3339 
3340  /*
3341  * If error is "cannot connect now", try the next host if
3342  * any (but we don't want to consider additional addresses
3343  * for this host, nor is there much point in changing SSL
3344  * or GSS mode). This is helpful when dealing with
3345  * standby servers that might not be in hot-standby state.
3346  */
3347  if (strcmp(conn->last_sqlstate,
3349  {
3350  conn->try_next_host = true;
3351  goto keep_going;
3352  }
3353 
3354  /* Check to see if we should mention pgpassfile */
3355  pgpassfileWarning(conn);
3356 
3357 #ifdef ENABLE_GSS
3358 
3359  /*
3360  * If gssencmode is "prefer" and we're using GSSAPI, retry
3361  * without it.
3362  */
3363  if (conn->gssenc && conn->gssencmode[0] == 'p')
3364  {
3365  /* only retry once */
3366  conn->try_gss = false;
3367  need_new_connection = true;
3368  goto keep_going;
3369  }
3370 #endif
3371 
3372 #ifdef USE_SSL
3373 
3374  /*
3375  * if sslmode is "allow" and we haven't tried an SSL
3376  * connection already, then retry with an SSL connection
3377  */
3378  if (conn->sslmode[0] == 'a' /* "allow" */
3379  && !conn->ssl_in_use
3380  && conn->allow_ssl_try
3381  && conn->wait_ssl_try)
3382  {
3383  /* only retry once */
3384  conn->wait_ssl_try = false;
3385  need_new_connection = true;
3386  goto keep_going;
3387  }
3388 
3389  /*
3390  * if sslmode is "prefer" and we're in an SSL connection,
3391  * then do a non-SSL retry
3392  */
3393  if (conn->sslmode[0] == 'p' /* "prefer" */
3394  && conn->ssl_in_use
3395  && conn->allow_ssl_try /* redundant? */
3396  && !conn->wait_ssl_try) /* redundant? */
3397  {
3398  /* only retry once */
3399  conn->allow_ssl_try = false;
3400  need_new_connection = true;
3401  goto keep_going;
3402  }
3403 #endif
3404 
3405  goto error_return;
3406  }
3407 
3408  /* It is an authentication request. */
3409  conn->auth_req_received = true;
3410 
3411  /* Get the type of request. */
3412  if (pqGetInt((int *) &areq, 4, conn))
3413  {
3414  /* We'll come back when there are more data */
3415  return PGRES_POLLING_READING;
3416  }
3417  msgLength -= 4;
3418 
3419  /*
3420  * Process the rest of the authentication request message, and
3421  * respond to it if necessary.
3422  *
3423  * Note that conn->pghost must be non-NULL if we are going to
3424  * avoid the Kerberos code doing a hostname look-up.
3425  */
3426  res = pg_fe_sendauth(areq, msgLength, conn);
3427 
3428  /* OK, we have processed the message; mark data consumed */
3429  conn->inStart = conn->inCursor;
3430 
3431  if (res != STATUS_OK)
3432  goto error_return;
3433 
3434  /*
3435  * Just make sure that any data sent by pg_fe_sendauth is
3436  * flushed out. Although this theoretically could block, it
3437  * really shouldn't since we don't send large auth responses.
3438  */
3439  if (pqFlush(conn))
3440  goto error_return;
3441 
3442  if (areq == AUTH_REQ_OK)
3443  {
3444  /* We are done with authentication exchange */
3445  conn->status = CONNECTION_AUTH_OK;
3446 
3447  /*
3448  * Set asyncStatus so that PQgetResult will think that
3449  * what comes back next is the result of a query. See
3450  * below.
3451  */
3452  conn->asyncStatus = PGASYNC_BUSY;
3453  }
3454 
3455  /* Look to see if we have more data yet. */
3456  goto keep_going;
3457  }
3458 
3459  case CONNECTION_AUTH_OK:
3460  {
3461  /*
3462  * Now we expect to hear from the backend. A ReadyForQuery
3463  * message indicates that startup is successful, but we might
3464  * also get an Error message indicating failure. (Notice
3465  * messages indicating nonfatal warnings are also allowed by
3466  * the protocol, as are ParameterStatus and BackendKeyData
3467  * messages.) Easiest way to handle this is to let
3468  * PQgetResult() read the messages. We just have to fake it
3469  * out about the state of the connection, by setting
3470  * asyncStatus = PGASYNC_BUSY (done above).
3471  */
3472 
3473  if (PQisBusy(conn))
3474  return PGRES_POLLING_READING;
3475 
3476  res = PQgetResult(conn);
3477 
3478  /*
3479  * NULL return indicating we have gone to IDLE state is
3480  * expected
3481  */
3482  if (res)
3483  {
3484  if (res->resultStatus != PGRES_FATAL_ERROR)
3486  libpq_gettext("unexpected message from server during startup\n"));
3487  else if (conn->send_appname &&
3488  (conn->appname || conn->fbappname))
3489  {
3490  /*
3491  * If we tried to send application_name, check to see
3492  * if the error is about that --- pre-9.0 servers will
3493  * reject it at this stage of the process. If so,
3494  * close the connection and retry without sending
3495  * application_name. We could possibly get a false
3496  * SQLSTATE match here and retry uselessly, but there
3497  * seems no great harm in that; we'll just get the
3498  * same error again if it's unrelated.
3499  */
3500  const char *sqlstate;
3501 
3502  sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE);
3503  if (sqlstate &&
3504  strcmp(sqlstate, ERRCODE_APPNAME_UNKNOWN) == 0)
3505  {
3506  PQclear(res);
3507  conn->send_appname = false;
3508  need_new_connection = true;
3509  goto keep_going;
3510  }
3511  }
3512 
3513  /*
3514  * if the resultStatus is FATAL, then conn->errorMessage
3515  * already has a copy of the error; needn't copy it back.
3516  * But add a newline if it's not there already, since
3517  * postmaster error messages may not have one.
3518  */
3519  if (conn->errorMessage.len <= 0 ||
3520  conn->errorMessage.data[conn->errorMessage.len - 1] != '\n')
3521  appendPQExpBufferChar(&conn->errorMessage, '\n');
3522  PQclear(res);
3523  goto error_return;
3524  }
3525 
3526  /* Almost there now ... */
3528  goto keep_going;
3529  }
3530 
3532  {
3533  /*
3534  * If a read-write, read-only, primary, or standby connection
3535  * is required, see if we have one.
3536  */
3539  {
3540  bool read_only_server;
3541 
3542  /*
3543  * If the server didn't report
3544  * "default_transaction_read_only" or "in_hot_standby" at
3545  * startup, we must determine its state by sending the
3546  * query "SHOW transaction_read_only". This GUC exists in
3547  * all server versions that support 3.0 protocol.
3548  */
3551  {
3552  /*
3553  * We use PQsendQueryContinue so that
3554  * conn->errorMessage does not get cleared. We need
3555  * to preserve any error messages related to previous
3556  * hosts we have tried and failed to connect to.
3557  */
3558  conn->status = CONNECTION_OK;
3559  if (!PQsendQueryContinue(conn,
3560  "SHOW transaction_read_only"))
3561  goto error_return;
3562  /* We'll return to this state when we have the answer */
3564  return PGRES_POLLING_READING;
3565  }
3566 
3567  /* OK, we can make the test */
3568  read_only_server =
3570  conn->in_hot_standby == PG_BOOL_YES);
3571 
3573  read_only_server : !read_only_server)
3574  {
3575  /* Wrong server state, reject and try the next host */
3578  libpq_gettext("session is read-only\n"));
3579  else
3581  libpq_gettext("session is not read-only\n"));
3582 
3583  /* Close connection politely. */
3584  conn->status = CONNECTION_OK;
3585  sendTerminateConn(conn);
3586 
3587  /*
3588  * Try next host if any, but we don't want to consider
3589  * additional addresses for this host.
3590  */
3591  conn->try_next_host = true;
3592  goto keep_going;
3593  }
3594  }
3595  else if (conn->target_server_type == SERVER_TYPE_PRIMARY ||
3598  {
3599  /*
3600  * If the server didn't report "in_hot_standby" at
3601  * startup, we must determine its state by sending the
3602  * query "SELECT pg_catalog.pg_is_in_recovery()". Servers
3603  * before 9.0 don't have that function, but by the same
3604  * token they don't have any standby mode, so we may just
3605  * assume the result.
3606  */
3607  if (conn->sversion < 90000)
3608  conn->in_hot_standby = PG_BOOL_NO;
3609 
3610  if (conn->in_hot_standby == PG_BOOL_UNKNOWN)
3611  {
3612  /*
3613  * We use PQsendQueryContinue so that
3614  * conn->errorMessage does not get cleared. We need
3615  * to preserve any error messages related to previous
3616  * hosts we have tried and failed to connect to.
3617  */
3618  conn->status = CONNECTION_OK;
3619  if (!PQsendQueryContinue(conn,
3620  "SELECT pg_catalog.pg_is_in_recovery()"))
3621  goto error_return;
3622  /* We'll return to this state when we have the answer */
3624  return PGRES_POLLING_READING;
3625  }
3626 
3627  /* OK, we can make the test */
3628  if ((conn->target_server_type == SERVER_TYPE_PRIMARY) ?
3629  (conn->in_hot_standby == PG_BOOL_YES) :
3630  (conn->in_hot_standby == PG_BOOL_NO))
3631  {
3632  /* Wrong server state, reject and try the next host */
3635  libpq_gettext("server is in hot standby mode\n"));
3636  else
3638  libpq_gettext("server is not in hot standby mode\n"));
3639 
3640  /* Close connection politely. */
3641  conn->status = CONNECTION_OK;
3642  sendTerminateConn(conn);
3643 
3644  /*
3645  * Try next host if any, but we don't want to consider
3646  * additional addresses for this host.
3647  */
3648  conn->try_next_host = true;
3649  goto keep_going;
3650  }
3651  }
3652 
3653  /* We can release the address list now. */
3654  release_conn_addrinfo(conn);
3655 
3656  /* We are open for business! */
3657  conn->status = CONNECTION_OK;
3658  return PGRES_POLLING_OK;
3659  }
3660 
3661  case CONNECTION_CONSUME:
3662  {
3663  /*
3664  * This state just makes sure the connection is idle after
3665  * we've obtained the result of a SHOW or SELECT query. Once
3666  * we're clear, return to CONNECTION_CHECK_TARGET state to
3667  * decide what to do next. We must transiently set status =
3668  * CONNECTION_OK in order to use the result-consuming
3669  * subroutines.
3670  */
3671  conn->status = CONNECTION_OK;
3672  if (!PQconsumeInput(conn))
3673  goto error_return;
3674 
3675  if (PQisBusy(conn))
3676  {
3677  conn->status = CONNECTION_CONSUME;
3678  return PGRES_POLLING_READING;
3679  }
3680 
3681  /* Call PQgetResult() again until we get a NULL result */
3682  res = PQgetResult(conn);
3683  if (res != NULL)
3684  {
3685  PQclear(res);
3686  conn->status = CONNECTION_CONSUME;
3687  return PGRES_POLLING_READING;
3688  }
3689 
3691  goto keep_going;
3692  }
3693 
3695  {
3696  /*
3697  * Waiting for result of "SHOW transaction_read_only". We
3698  * must transiently set status = CONNECTION_OK in order to use
3699  * the result-consuming subroutines.
3700  */
3701  conn->status = CONNECTION_OK;
3702  if (!PQconsumeInput(conn))
3703  goto error_return;
3704 
3705  if (PQisBusy(conn))
3706  {
3708  return PGRES_POLLING_READING;
3709  }
3710 
3711  res = PQgetResult(conn);
3712  if (res && PQresultStatus(res) == PGRES_TUPLES_OK &&
3713  PQntuples(res) == 1)
3714  {
3715  char *val = PQgetvalue(res, 0, 0);
3716 
3717  /*
3718  * "transaction_read_only = on" proves that at least one
3719  * of default_transaction_read_only and in_hot_standby is
3720  * on, but we don't actually know which. We don't care
3721  * though for the purpose of identifying a read-only
3722  * session, so satisfy the CONNECTION_CHECK_TARGET code by
3723  * claiming they are both on. On the other hand, if it's
3724  * a read-write session, they are certainly both off.
3725  */
3726  if (strncmp(val, "on", 2) == 0)
3727  {
3729  conn->in_hot_standby = PG_BOOL_YES;
3730  }
3731  else
3732  {
3734  conn->in_hot_standby = PG_BOOL_NO;
3735  }
3736  PQclear(res);
3737 
3738  /* Finish reading messages before continuing */
3739  conn->status = CONNECTION_CONSUME;
3740  goto keep_going;
3741  }
3742 
3743  /* Something went wrong with "SHOW transaction_read_only". */
3744  if (res)
3745  PQclear(res);
3746 
3747  /* Append error report to conn->errorMessage. */
3749  libpq_gettext("\"SHOW transaction_read_only\" failed\n"));
3750 
3751  /* Close connection politely. */
3752  conn->status = CONNECTION_OK;
3753  sendTerminateConn(conn);
3754 
3755  /* Try next host. */
3756  conn->try_next_host = true;
3757  goto keep_going;
3758  }
3759 
3761  {
3762  /*
3763  * Waiting for result of "SELECT pg_is_in_recovery()". We
3764  * must transiently set status = CONNECTION_OK in order to use
3765  * the result-consuming subroutines.
3766  */
3767  conn->status = CONNECTION_OK;
3768  if (!PQconsumeInput(conn))
3769  goto error_return;
3770 
3771  if (PQisBusy(conn))
3772  {
3774  return PGRES_POLLING_READING;
3775  }
3776 
3777  res = PQgetResult(conn);
3778  if (res && PQresultStatus(res) == PGRES_TUPLES_OK &&
3779  PQntuples(res) == 1)
3780  {
3781  char *val = PQgetvalue(res, 0, 0);
3782 
3783  if (strncmp(val, "t", 1) == 0)
3784  conn->in_hot_standby = PG_BOOL_YES;
3785  else
3786  conn->in_hot_standby = PG_BOOL_NO;
3787  PQclear(res);
3788 
3789  /* Finish reading messages before continuing */
3790  conn->status = CONNECTION_CONSUME;
3791  goto keep_going;
3792  }
3793 
3794  /* Something went wrong with "SELECT pg_is_in_recovery()". */
3795  if (res)
3796  PQclear(res);
3797 
3798  /* Append error report to conn->errorMessage. */
3800  libpq_gettext("\"SELECT pg_is_in_recovery()\" failed\n"));
3801 
3802  /* Close connection politely. */
3803  conn->status = CONNECTION_OK;
3804  sendTerminateConn(conn);
3805 
3806  /* Try next host. */
3807  conn->try_next_host = true;
3808  goto keep_going;
3809  }
3810 
3811  default:
3813  libpq_gettext("invalid connection state %d, "
3814  "probably indicative of memory corruption\n"),
3815  conn->status);
3816  goto error_return;
3817  }
3818 
3819  /* Unreachable */
3820 
3821 error_return:
3822 
3823  /*
3824  * We used to close the socket at this point, but that makes it awkward
3825  * for those above us if they wish to remove this socket from their own
3826  * records (an fd_set for example). We'll just have this socket closed
3827  * when PQfinish is called (which is compulsory even after an error, since
3828  * the connection structure must be freed).
3829  */
3830  conn->status = CONNECTION_BAD;
3831  return PGRES_POLLING_FAILED;
3832 }
int pqFlush(PGconn *conn)
Definition: fe-misc.c:965
bool sigpipe_flag
Definition: libpq-int.h:452
char * gssencmode
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Definition: libpq-int.h:412
int ai_family
Definition: getaddrinfo.h:101

◆ PQconnectStart()

PGconn* PQconnectStart ( const char *  conninfo)

Definition at line 846 of file fe-connect.c.

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

Referenced by PQconnectdb(), and PQping().

847 {
848  PGconn *conn;
849 
850  /*
851  * Allocate memory for the conn structure. Note that we also expect this
852  * to initialize conn->errorMessage to empty. All subsequent steps during
853  * connection initialization will only append to that buffer.
854  */
855  conn = makeEmptyPGconn();
856  if (conn == NULL)
857  return NULL;
858 
859  /*
860  * Parse the conninfo string
861  */
862  if (!connectOptions1(conn, conninfo))
863  return conn;
864 
865  /*
866  * Compute derived options
867  */
868  if (!connectOptions2(conn))
869  return conn;
870 
871  /*
872  * Connect to the database
873  */
874  if (!connectDBStart(conn))
875  {
876  /* Just in case we failed to set it in connectDBStart */
877  conn->status = CONNECTION_BAD;
878  }
879 
880  return conn;
881 }
static bool connectOptions1(PGconn *conn, const char *conninfo)
Definition: fe-connect.c:934
PGconn * conn
Definition: streamutil.c:54
static int connectDBStart(PGconn *conn)
Definition: fe-connect.c:2040
static PGconn * makeEmptyPGconn(void)
Definition: fe-connect.c:3907
ConnStatusType status
Definition: libpq-int.h:409
static bool connectOptions2(PGconn *conn)
Definition: fe-connect.c:1032

◆ PQconnectStartParams()

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

Definition at line 765 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().

768 {
769  PGconn *conn;
770  PQconninfoOption *connOptions;
771 
772  /*
773  * Allocate memory for the conn structure. Note that we also expect this
774  * to initialize conn->errorMessage to empty. All subsequent steps during
775  * connection initialization will only append to that buffer.
776  */
777  conn = makeEmptyPGconn();
778  if (conn == NULL)
779  return NULL;
780 
781  /*
782  * Parse the conninfo arrays
783  */
784  connOptions = conninfo_array_parse(keywords, values,
785  &conn->errorMessage,
786  true, expand_dbname);
787  if (connOptions == NULL)
788  {
789  conn->status = CONNECTION_BAD;
790  /* errorMessage is already set */
791  return conn;
792  }
793 
794  /*
795  * Move option values into conn structure
796  */
797  if (!fillPGconn(conn, connOptions))
798  {
799  PQconninfoFree(connOptions);
800  return conn;
801  }
802 
803  /*
804  * Free the option info - all is in conn now
805  */
806  PQconninfoFree(connOptions);
807 
808  /*
809  * Compute derived options
810  */
811  if (!connectOptions2(conn))
812  return conn;
813 
814  /*
815  * Connect to the database
816  */
817  if (!connectDBStart(conn))
818  {
819  /* Just in case we failed to set it in connectDBStart */
820  conn->status = CONNECTION_BAD;
821  }
822 
823  return conn;
824 }
PGconn * conn
Definition: streamutil.c:54
static int connectDBStart(PGconn *conn)
Definition: fe-connect.c:2040
void PQconninfoFree(PQconninfoOption *connOptions)
Definition: fe-connect.c:6555
static PGconn * makeEmptyPGconn(void)
Definition: fe-connect.c:3907
PQExpBufferData errorMessage
Definition: libpq-int.h:569
static bool fillPGconn(PGconn *conn, PQconninfoOption *connOptions)
Definition: fe-connect.c:892
ConnStatusType status
Definition: libpq-int.h:409
static Datum values[MAXATTR]
Definition: bootstrap.c:166
static bool connectOptions2(PGconn *conn)
Definition: fe-connect.c:1032
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:5614

◆ PQconninfo()

PQconninfoOption* PQconninfo ( PGconn conn)

Definition at line 6511 of file fe-connect.c.

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

Referenced by do_connect(), GenerateRecoveryConfig(), and libpqrcv_get_conninfo().

6512 {
6513  PQExpBufferData errorBuf;
6514  PQconninfoOption *connOptions;
6515 
6516  if (conn == NULL)
6517  return NULL;
6518 
6519  /*
6520  * We don't actually report any errors here, but callees want a buffer,
6521  * and we prefer not to trash the conn's errorMessage.
6522  */
6523  initPQExpBuffer(&errorBuf);
6524  if (PQExpBufferDataBroken(errorBuf))
6525  return NULL; /* out of memory already :-( */
6526 
6527  connOptions = conninfo_init(&errorBuf);
6528 
6529  if (connOptions != NULL)
6530  {
6532 
6533  for (option = PQconninfoOptions; option->keyword; option++)
6534  {
6535  char **connmember;
6536 
6537  if (option->connofs < 0)
6538  continue;
6539 
6540  connmember = (char **) ((char *) conn + option->connofs);
6541 
6542  if (*connmember)
6543  conninfo_storeval(connOptions, option->keyword, *connmember,
6544  &errorBuf, true, false);
6545  }
6546  }
6547 
6548  termPQExpBuffer(&errorBuf);
6549 
6550  return connOptions;
6551 }
static PQconninfoOption * conninfo_storeval(PQconninfoOption *connOptions, const char *keyword, const char *value, PQExpBuffer errorMessage, bool ignoreMissing, bool uri_decode)
Definition: fe-connect.c:6428
void termPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:131
static PQconninfoOption * conninfo_init(PQExpBuffer errorMessage)
Definition: fe-connect.c:5342
static const internalPQconninfoOption PQconninfoOptions[]
Definition: fe-connect.c:192
#define PQExpBufferDataBroken(buf)
Definition: pqexpbuffer.h:67
void initPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:92

◆ PQconninfoFree()

void PQconninfoFree ( PQconninfoOption connOptions)

Definition at line 6555 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(), do_connect(), GenerateRecoveryConfig(), GetConnection(), libpqrcv_check_conninfo(), libpqrcv_get_conninfo(), PQconndefaults(), and PQconnectStartParams().

6556 {
6558 
6559  if (connOptions == NULL)
6560  return;
6561 
6562  for (option = connOptions; option->keyword != NULL; option++)
6563  {
6564  if (option->val != NULL)
6565  free(option->val);
6566  }
6567  free(connOptions);
6568 }
#define free(a)
Definition: header.h:65

◆ PQconninfoParse()

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

Definition at line 5320 of file fe-connect.c.

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

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

5321 {
5322  PQExpBufferData errorBuf;
5323  PQconninfoOption *connOptions;
5324 
5325  if (errmsg)
5326  *errmsg = NULL; /* default */
5327  initPQExpBuffer(&errorBuf);
5328  if (PQExpBufferDataBroken(errorBuf))
5329  return NULL; /* out of memory already :-( */
5330  connOptions = parse_connection_string(conninfo, &errorBuf, false);
5331  if (connOptions == NULL && errmsg)
5332  *errmsg = errorBuf.data;
5333  else
5334  termPQExpBuffer(&errorBuf);
5335  return connOptions;
5336 }
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:5382
#define PQExpBufferDataBroken(buf)
Definition: pqexpbuffer.h:67
int errmsg(const char *fmt,...)
Definition: elog.c:909
void initPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:92

◆ PQconsumeInput()

int PQconsumeInput ( PGconn conn)

Definition at line 1853 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(), pgfdw_get_cleanup_result(), pgfdw_get_result(), postgresForeignAsyncNotify(), PQconnectPoll(), PrintNotifications(), StreamLogicalLog(), test_pipelined_insert(), try_complete_step(), and wait_on_slots().

1854 {
1855  if (!conn)
1856  return 0;
1857 
1858  /*
1859  * for non-blocking connections try to flush the send-queue, otherwise we
1860  * may never get a response for something that may not have already been
1861  * sent because it's in our write buffer!
1862  */
1863  if (pqIsnonblocking(conn))
1864  {
1865  if (pqFlush(conn) < 0)
1866  return 0;
1867  }
1868 
1869  /*
1870  * Load more data, if available. We do this no matter what state we are
1871  * in, since we are probably getting called because the application wants
1872  * to get rid of a read-select condition. Note that we will NOT block
1873  * waiting for more input.
1874  */
1875  if (pqReadData(conn) < 0)
1876  return 0;
1877 
1878  /* Parsing of the data waits till later. */
1879  return 1;
1880 }
int pqFlush(PGconn *conn)
Definition: fe-misc.c:965
#define pqIsnonblocking(conn)
Definition: libpq-int.h:835
int pqReadData(PGconn *conn)
Definition: fe-misc.c:568

◆ PQcopyResult()

PGresult* PQcopyResult ( const PGresult src,
int  flags 
)

Definition at line 299 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().

300 {
301  PGresult *dest;
302  int i;
303 
304  if (!src)
305  return NULL;
306 
307  dest = PQmakeEmptyPGresult(NULL, PGRES_TUPLES_OK);
308  if (!dest)
309  return NULL;
310 
311  /* Always copy these over. Is cmdStatus really useful here? */
312  dest->client_encoding = src->client_encoding;
313  strcpy(dest->cmdStatus, src->cmdStatus);
314 
315  /* Wants attrs? */
316  if (flags & (PG_COPYRES_ATTRS | PG_COPYRES_TUPLES))
317  {
318  if (!PQsetResultAttrs(dest, src->numAttributes, src->attDescs))
319  {
320  PQclear(dest);
321  return NULL;
322  }
323  }
324 
325  /* Wants to copy tuples? */
326  if (flags & PG_COPYRES_TUPLES)
327  {
328  int tup,
329  field;
330 
331  for (tup = 0; tup < src->ntups; tup++)
332  {
333  for (field = 0; field < src->numAttributes; field++)
334  {
335  if (!PQsetvalue(dest, tup, field,
336  src->tuples[tup][field].value,
337  src->tuples[tup][field].len))
338  {
339  PQclear(dest);
340  return NULL;
341  }
342  }
343  }
344  }
345 
346  /* Wants to copy notice hooks? */
347  if (flags & PG_COPYRES_NOTICEHOOKS)
348  dest->noticeHooks = src->noticeHooks;
349 
350  /* Wants to copy PGEvents? */
351  if ((flags & PG_COPYRES_EVENTS) && src->nEvents > 0)
352  {
353  dest->events = dupEvents(src->events, src->nEvents,
354  &dest->memorySize);
355  if (!dest->events)
356  {
357  PQclear(dest);
358  return NULL;
359  }
360  dest->nEvents = src->nEvents;
361  }
362 
363  /* Okay, trigger PGEVT_RESULTCOPY event */
364  for (i = 0; i < dest->nEvents; i++)
365  {
366  if (src->events[i].resultInitialized)
367  {
368  PGEventResultCopy evt;
369 
370  evt.src = src;
371  evt.dest = dest;
372  if (!dest->events[i].proc(PGEVT_RESULTCOPY, &evt,
373  dest->events[i].passThrough))
374  {
375  PQclear(dest);
376  return NULL;
377  }
378  dest->events[i].resultInitialized = true;
379  }
380  }
381 
382  return dest;
383 }
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:436
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:234
PGresult * PQmakeEmptyPGresult(PGconn *conn, ExecStatusType status)
Definition: fe-exec.c:146
int numAttributes
Definition: libpq-int.h:170
#define PG_COPYRES_ATTRS
Definition: libpq-fe.h:34
void PQclear(PGresult *res)
Definition: fe-exec.c:680
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:392
PGEvent * events
Definition: libpq-int.h:187
PGresult * dest
Definition: libpq-events.h:61
int client_encoding
Definition: libpq-int.h:189

◆ PQdb()

◆ PQdefaultSSLKeyPassHook_OpenSSL()

int PQdefaultSSLKeyPassHook_OpenSSL ( char *  buf,
int  size,
PGconn conn 
)

Definition at line 1768 of file fe-secure-openssl.c.

References fprintf, libpq_gettext, and pg_conn::sslpassword.

Referenced by PQssl_passwd_cb().

1769 {
1770  if (conn->sslpassword)
1771  {
1772  if (strlen(conn->sslpassword) + 1 > size)
1773  fprintf(stderr, libpq_gettext("WARNING: sslpassword truncated\n"));
1774  strncpy(buf, conn->sslpassword, size);
1775  buf[size - 1] = '\0';
1776  return strlen(buf);
1777  }
1778  else
1779  {
1780  buf[0] = '\0';
1781  return 0;
1782  }
1783 }
#define fprintf
Definition: port.h:220
static char * buf
Definition: pg_test_fsync.c:68
char * sslpassword
Definition: libpq-int.h:382
#define libpq_gettext(x)
Definition: libpq-int.h:846

◆ PQdescribePortal()

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

Definition at line 2354 of file fe-exec.c.

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

2355 {
2356  if (!PQexecStart(conn))
2357  return NULL;
2358  if (!PQsendDescribe(conn, 'P', portal))
2359  return NULL;
2360  return PQexecFinish(conn);
2361 }
static int PQsendDescribe(PGconn *conn, char desc_type, const char *desc_target)
Definition: fe-exec.c:2399
static PGresult * PQexecFinish(PGconn *conn)
Definition: fe-exec.c:2289
static bool PQexecStart(PGconn *conn)
Definition: fe-exec.c:2224

◆ PQdescribePrepared()

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

Definition at line 2335 of file fe-exec.c.

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

Referenced by DescribeQuery(), and ECPGdescribe().

2336 {
2337  if (!PQexecStart(conn))
2338  return NULL;
2339  if (!PQsendDescribe(conn, 'S', stmt))
2340  return NULL;
2341  return PQexecFinish(conn);
2342 }
static int PQsendDescribe(PGconn *conn, char desc_type, const char *desc_target)
Definition: fe-exec.c:2399
static PGresult * PQexecFinish(PGconn *conn)
Definition: fe-exec.c:2289
static bool PQexecStart(PGconn *conn)
Definition: fe-exec.c:2224

◆ 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  (abs(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:3572
int PQnfields(const PGresult *res)
Definition: fe-exec.c:3175
char * PQgetvalue(const PGresult *res, int tup_num, int field_num)
Definition: fe-exec.c:3561
char * PQfname(const PGresult *res, int field_num)
Definition: fe-exec.c:3253
int PQntuples(const PGresult *res)
Definition: fe-exec.c:3167
#define fprintf
Definition: port.h:220
#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:846

◆ PQdsplen()

int PQdsplen ( const char *  s,
int  encoding 
)

Definition at line 1196 of file fe-misc.c.

References pg_encoding_dsplen().

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

1197 {
1198  return pg_encoding_dsplen(encoding, s);
1199 }
int pg_encoding_dsplen(int encoding, const char *mbstr)
Definition: wchar.c:1927
int32 encoding
Definition: pg_database.h:41

◆ PQencryptPassword()

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

Definition at line 1150 of file fe-auth.c.

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

1151 {
1152  char *crypt_pwd;
1153 
1154  crypt_pwd = malloc(MD5_PASSWD_LEN + 1);
1155  if (!crypt_pwd)
1156  return NULL;
1157 
1158  if (!pg_md5_encrypt(passwd, user, strlen(user), crypt_pwd))
1159  {
1160  free(crypt_pwd);
1161  return NULL;
1162  }
1163 
1164  return crypt_pwd;
1165 }
#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_common.c:124
#define free(a)
Definition: header.h:65
static char * user
Definition: pg_regress.c:95
#define MD5_PASSWD_LEN
Definition: md5.h:26

◆ PQencryptPasswordConn()

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

Definition at line 1192 of file fe-auth.c.

References appendPQExpBuffer(), appendPQExpBufferStr(), pg_conn::errorMessage, free, libpq_gettext, malloc, MAX_ALGORITHM_NAME_LEN, MD5_PASSWD_LEN, pg_fe_scram_build_secret(), pg_md5_encrypt(), PGRES_TUPLES_OK, PQclear(), PQexec(), PQgetvalue(), PQnfields(), PQntuples(), PQresultStatus(), resetPQExpBuffer(), and val.

Referenced by exec_command_password(), and main().

1194 {
1195 #define MAX_ALGORITHM_NAME_LEN 50
1196  char algobuf[MAX_ALGORITHM_NAME_LEN + 1];
1197  char *crypt_pwd = NULL;
1198 
1199  if (!conn)
1200  return NULL;
1201 
1203 
1204  /* If no algorithm was given, ask the server. */
1205  if (algorithm == NULL)
1206  {
1207  PGresult *res;
1208  char *val;
1209 
1210  res =