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 LIBPQ_HAS_PIPELINING   1
 
#define LIBPQ_HAS_TRACE_FLAGS   1
 
#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 PQ_QUERY_PARAM_MAX_LIMIT   65535
 
#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 PQsetTraceFlags (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)
 
int PQsendFlushRequest (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 PQmblenBounded (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

◆ LIBPQ_HAS_PIPELINING

#define LIBPQ_HAS_PIPELINING   1

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

◆ LIBPQ_HAS_TRACE_FLAGS

#define LIBPQ_HAS_TRACE_FLAGS   1

Definition at line 38 of file libpq-fe.h.

◆ PG_COPYRES_ATTRS

#define PG_COPYRES_ATTRS   0x01

Definition at line 43 of file libpq-fe.h.

Referenced by PQcopyResult(), and pqRowProcessor().

◆ PG_COPYRES_EVENTS

#define PG_COPYRES_EVENTS   0x04

Definition at line 45 of file libpq-fe.h.

Referenced by PQcopyResult(), and pqRowProcessor().

◆ PG_COPYRES_NOTICEHOOKS

#define PG_COPYRES_NOTICEHOOKS   0x08

Definition at line 46 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 44 of file libpq-fe.h.

Referenced by PQcopyResult().

◆ PQ_QUERY_PARAM_MAX_LIMIT

#define PQ_QUERY_PARAM_MAX_LIMIT   65535

◆ PQfreeNotify

#define PQfreeNotify (   ptr)    PQfreemem(ptr)

Definition at line 555 of file libpq-fe.h.

◆ PQnoPasswordSupplied

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

Definition at line 559 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 293 of file libpq-fe.h.

Referenced by main().

◆ PQTRACE_REGRESS_MODE

#define PQTRACE_REGRESS_MODE   (1<<1)

Definition at line 414 of file libpq-fe.h.

Referenced by main(), and pqTraceOutputMessage().

◆ PQTRACE_SUPPRESS_TIMESTAMPS

#define PQTRACE_SUPPRESS_TIMESTAMPS   (1<<0)

Definition at line 412 of file libpq-fe.h.

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

Typedef Documentation

◆ PGcancel

typedef struct pg_cancel PGcancel

Definition at line 177 of file libpq-fe.h.

◆ PGconn

typedef struct pg_conn PGconn

Definition at line 164 of file libpq-fe.h.

◆ PGnotify

typedef struct pgNotify PGnotify

◆ PGresAttDesc

typedef struct pgresAttDesc PGresAttDesc

◆ PGresult

typedef struct pg_result PGresult

Definition at line 171 of file libpq-fe.h.

◆ pgthreadlock_t

typedef void(* pgthreadlock_t) (int acquire)

Definition at line 402 of file libpq-fe.h.

◆ pqbool

typedef char pqbool

Definition at line 199 of file libpq-fe.h.

◆ PQconninfoOption

◆ PQnoticeProcessor

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

Definition at line 196 of file libpq-fe.h.

◆ PQnoticeReceiver

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

Definition at line 195 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 663 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 56 of file libpq-fe.h.

57 {
60  /* Non-blocking mode only below here */
61 
62  /*
63  * The existence of these should never be relied upon - they should only
64  * be used for user feedback or similar purposes.
65  */
66  CONNECTION_STARTED, /* Waiting for connection to be made. */
67  CONNECTION_MADE, /* Connection OK; waiting to send. */
68  CONNECTION_AWAITING_RESPONSE, /* Waiting for a response from the
69  * postmaster. */
70  CONNECTION_AUTH_OK, /* Received authentication; waiting for
71  * backend startup. */
72  CONNECTION_SETENV, /* This state is no longer used. */
73  CONNECTION_SSL_STARTUP, /* Negotiating SSL. */
74  CONNECTION_NEEDED, /* Internal state: connect() needed */
75  CONNECTION_CHECK_WRITABLE, /* Checking if session is read-write. */
76  CONNECTION_CONSUME, /* Consuming any extra messages. */
77  CONNECTION_GSS_STARTUP, /* Negotiating GSSAPI. */
78  CONNECTION_CHECK_TARGET, /* Checking target server properties. */
79  CONNECTION_CHECK_STANDBY /* Checking if server is in standby mode. */
ConnStatusType
Definition: libpq-fe.h:56

◆ 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 92 of file libpq-fe.h.

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

◆ PGContextVisibility

Enumerator
PQSHOW_CONTEXT_NEVER 
PQSHOW_CONTEXT_ERRORS 
PQSHOW_CONTEXT_ALWAYS 

Definition at line 131 of file libpq-fe.h.

132 {
133  PQSHOW_CONTEXT_NEVER, /* never show CONTEXT field */
134  PQSHOW_CONTEXT_ERRORS, /* show CONTEXT for errors only (default) */
135  PQSHOW_CONTEXT_ALWAYS /* always show CONTEXT field */
PGContextVisibility
Definition: libpq-fe.h:131

◆ PGPing

enum PGPing
Enumerator
PQPING_OK 
PQPING_REJECT 
PQPING_NO_RESPONSE 
PQPING_NO_ATTEMPT 

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

144 {
145  PQPING_OK, /* server is accepting connections */
146  PQPING_REJECT, /* server is alive but rejecting connections */
147  PQPING_NO_RESPONSE, /* could not establish connection */
148  PQPING_NO_ATTEMPT /* connection not attempted (bad params) */
149 } PGPing;
PGPing
Definition: libpq-fe.h:143

◆ PGpipelineStatus

Enumerator
PQ_PIPELINE_OFF 
PQ_PIPELINE_ON 
PQ_PIPELINE_ABORTED 

Definition at line 154 of file libpq-fe.h.

◆ PGTransactionStatusType

Enumerator
PQTRANS_IDLE 
PQTRANS_ACTIVE 
PQTRANS_INTRANS 
PQTRANS_INERROR 
PQTRANS_UNKNOWN 

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

115 {
116  PQTRANS_IDLE, /* connection idle */
117  PQTRANS_ACTIVE, /* command in progress */
118  PQTRANS_INTRANS, /* idle, within transaction block */
119  PQTRANS_INERROR, /* idle, within failed transaction */
120  PQTRANS_UNKNOWN /* cannot determine status */
PGTransactionStatusType
Definition: libpq-fe.h:114

◆ PGVerbosity

Enumerator
PQERRORS_TERSE 
PQERRORS_DEFAULT 
PQERRORS_VERBOSE 
PQERRORS_SQLSTATE 

Definition at line 123 of file libpq-fe.h.

124 {
125  PQERRORS_TERSE, /* single-line error messages */
126  PQERRORS_DEFAULT, /* recommended style */
127  PQERRORS_VERBOSE, /* all the facts, ma'am */
128  PQERRORS_SQLSTATE /* only error severity and SQLSTATE code */
129 } PGVerbosity;
PGVerbosity
Definition: libpq-fe.h:123

◆ PostgresPollingStatusType

Enumerator
PGRES_POLLING_FAILED 
PGRES_POLLING_READING 
PGRES_POLLING_WRITING 
PGRES_POLLING_OK 
PGRES_POLLING_ACTIVE 

Definition at line 82 of file libpq-fe.h.

83 {
85  PGRES_POLLING_READING, /* These two indicate that one may */
86  PGRES_POLLING_WRITING, /* use select before polling again. */
88  PGRES_POLLING_ACTIVE /* unused; keep for awhile for backwards
89  * compatibility */
PostgresPollingStatusType
Definition: libpq-fe.h:82

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 }
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:2833
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3178
void PQclear(PGresult *res)
Definition: fe-exec.c:694
Oid fn_lo_close
Definition: libpq-int.h:271
union PQArgBlock::@162 u
int isint
Definition: libpq-fe.h:247
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:476
int integer
Definition: libpq-fe.h:251
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:65
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:2833
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3178
#define InvalidOid
Definition: postgres_ext.h:36
void PQclear(PGresult *res)
Definition: fe-exec.c:694
Oid fn_lo_creat
Definition: libpq-int.h:272
union PQArgBlock::@162 u
int isint
Definition: libpq-fe.h:247
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:476
int integer
Definition: libpq-fe.h:251
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 }
Oid fn_lo_create
Definition: libpq-int.h:273
unsigned int Oid
Definition: postgres_ext.h:31
PGresult * PQfn(PGconn *conn, int fnid, int *result_buf, int *result_len, int result_is_int, const PQArgBlock *args, int nargs)
Definition: fe-exec.c:2833
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3178
void appendPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:267
PQExpBufferData errorMessage
Definition: libpq-int.h:571
#define InvalidOid
Definition: postgres_ext.h:36
void PQclear(PGresult *res)
Definition: fe-exec.c:694
union PQArgBlock::@162 u
int isint
Definition: libpq-fe.h:247
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:476
#define libpq_gettext(x)
Definition: libpq-int.h:841
int integer
Definition: libpq-fe.h:251
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:235
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:571
#define LO_BUFSIZE
Definition: fe-lobj.c:42
#define strerror_r
Definition: port.h:234
static char * filename
Definition: pg_dumpall.c:92
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:841

◆ 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:92

◆ 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:92

◆ 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 }
Oid fn_lo_lseek
Definition: libpq-int.h:275
PGresult * PQfn(PGconn *conn, int fnid, int *result_buf, int *result_len, int result_is_int, const PQArgBlock *args, int nargs)
Definition: fe-exec.c:2833
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3178
void PQclear(PGresult *res)
Definition: fe-exec.c:694
union PQArgBlock::@162 u
int isint
Definition: libpq-fe.h:247
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:476
int integer
Definition: libpq-fe.h:251
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 }
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:2833
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3178
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:571
void PQclear(PGresult *res)
Definition: fe-exec.c:694
union PQArgBlock::@162 u
Oid fn_lo_lseek64
Definition: libpq-int.h:276
int isint
Definition: libpq-fe.h:247
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:476
int * ptr
Definition: libpq-fe.h:250
#define libpq_gettext(x)
Definition: libpq-int.h:841
int integer
Definition: libpq-fe.h:251
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:65
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:2833
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3178
Oid fn_lo_open
Definition: libpq-int.h:270
void PQclear(PGresult *res)
Definition: fe-exec.c:694
union PQArgBlock::@162 u
int isint
Definition: libpq-fe.h:247
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:476
int integer
Definition: libpq-fe.h:251
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 }
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:2833
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3178
Oid fn_lo_read
Definition: libpq-int.h:281
static char * buf
Definition: pg_test_fsync.c:68
PQExpBufferData errorMessage
Definition: libpq-int.h:571
void PQclear(PGresult *res)
Definition: fe-exec.c:694
union PQArgBlock::@162 u
int isint
Definition: libpq-fe.h:247
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:476
#define libpq_gettext(x)
Definition: libpq-int.h:841
int integer
Definition: libpq-fe.h:251
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 }
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:2833
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3178
Oid fn_lo_tell
Definition: libpq-int.h:277
void PQclear(PGresult *res)
Definition: fe-exec.c:694
union PQArgBlock::@162 u
int isint
Definition: libpq-fe.h:247
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:476
int integer
Definition: libpq-fe.h:251
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 }
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:2833
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3178
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:278
PQExpBufferData errorMessage
Definition: libpq-int.h:571
void PQclear(PGresult *res)
Definition: fe-exec.c:694
union PQArgBlock::@162 u
int isint
Definition: libpq-fe.h:247
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:476
#define libpq_gettext(x)
Definition: libpq-int.h:841
int integer
Definition: libpq-fe.h:251
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 }
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:2833
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3178
Oid fn_lo_truncate
Definition: libpq-int.h:279
void appendPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:267
PQExpBufferData errorMessage
Definition: libpq-int.h:571
void PQclear(PGresult *res)
Definition: fe-exec.c:694
union PQArgBlock::@162 u
int isint
Definition: libpq-fe.h:247
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:476
#define libpq_gettext(x)
Definition: libpq-int.h:841
int integer
Definition: libpq-fe.h:251
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 }
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:2833
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3178
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:280
PQExpBufferData errorMessage
Definition: libpq-int.h:571
void PQclear(PGresult *res)
Definition: fe-exec.c:694
union PQArgBlock::@162 u
int isint
Definition: libpq-fe.h:247
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:476
int * ptr
Definition: libpq-fe.h:250
#define libpq_gettext(x)
Definition: libpq-int.h:841
int integer
Definition: libpq-fe.h:251
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 }
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:2833
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3178
void PQclear(PGresult *res)
Definition: fe-exec.c:694
union PQArgBlock::@162 u
Oid fn_lo_unlink
Definition: libpq-int.h:274
int isint
Definition: libpq-fe.h:247
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:476
int integer
Definition: libpq-fe.h:251
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 }
Oid fn_lo_write
Definition: libpq-int.h:282
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:2833
static int fd(const char *x, int i)
Definition: preproc-init.c:105
ExecStatusType PQresultStatus(const PGresult *res)
Definition: fe-exec.c:3178
static char * buf
Definition: pg_test_fsync.c:68
#define unconstify(underlying_type, expr)
Definition: c.h:1243
PQExpBufferData errorMessage
Definition: libpq-int.h:571
void PQclear(PGresult *res)
Definition: fe-exec.c:694
union PQArgBlock::@162 u
int isint
Definition: libpq-fe.h:247
PGlobjfuncs * lobjfuncs
Definition: libpq-int.h:476
int * ptr
Definition: libpq-fe.h:250
#define libpq_gettext(x)
Definition: libpq-int.h:841
int integer
Definition: libpq-fe.h:251
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:561
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 6778 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().

6779 {
6780  if (!conn || conn->status != CONNECTION_OK)
6781  return 0;
6782  return conn->be_pid;
6783 }
ConnStatusType status
Definition: libpq-int.h:410
int be_pid
Definition: libpq-int.h:467

◆ PQbinaryTuples()

int PQbinaryTuples ( const PGresult res)

Definition at line 3264 of file fe-exec.c.

References pg_result::binary.

Referenced by ProcessResult().

3265 {
3266  if (!res)
3267  return 0;
3268  return res->binary;
3269 }
int binary
Definition: libpq-int.h:180

◆ PQcancel()

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

Definition at line 4507 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().

4508 {
4509  if (!cancel)
4510  {
4511  strlcpy(errbuf, "PQcancel() -- no cancel object supplied", errbufsize);
4512  return false;
4513  }
4514 
4515  return internal_cancel(&cancel->raddr, cancel->be_pid, cancel->be_key,
4516  errbuf, errbufsize);
4517 }
static int internal_cancel(SockAddr *raddr, int be_pid, int be_key, char *errbuf, int errbufsize)
Definition: fe-connect.c:4403
int be_pid
Definition: libpq-int.h:584
int be_key
Definition: libpq-int.h:585
size_t strlcpy(char *dst, const char *src, size_t siz)
Definition: strlcpy.c:45
SockAddr raddr
Definition: libpq-int.h:583

◆ PQclear()

void PQclear ( PGresult res)

Definition at line 694 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_types_usage(), check_for_isn_and_int8_passing_mismatch(), check_for_pg_role_prefix(), check_for_prepared_transactions(), 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(), 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(), process_result(), processExtensionTables(), processQueryResult(), ProcessResult(), PSQLexecWatch(), readCommandResponse(), ReceiveCopyData(), ReceiveXlogStream(), reindex_all_databases(), report_extension_updates(), 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_nosync(), 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().

695 {
696  PGresult_data *block;
697  int i;
698 
699  if (!res)
700  return;
701 
702  for (i = 0; i < res->nEvents; i++)
703  {
704  /* only send DESTROY to successfully-initialized event procs */
705  if (res->events[i].resultInitialized)
706  {
708 
709  evt.result = res;
710  (void) res->events[i].proc(PGEVT_RESULTDESTROY, &evt,
711  res->events[i].passThrough);
712  }
713  free(res->events[i].name);
714  }
715 
716  if (res->events)
717  free(res->events);
718 
719  /* Free all the subsidiary blocks */
720  while ((block = res->curBlock) != NULL)
721  {
722  res->curBlock = block->next;
723  free(block);
724  }
725 
726  /* Free the top-level tuple pointer array */
727  if (res->tuples)
728  free(res->tuples);
729 
730  /* zero out the pointer fields to catch programming errors */
731  res->attDescs = NULL;
732  res->tuples = NULL;
733  res->paramDescs = NULL;
734  res->errFields = NULL;
735  res->events = NULL;
736  res->nEvents = 0;
737  /* res->curBlock was zeroed out earlier */
738 
739  /* Free the PGresult structure itself */
740  free(res);
741 }
PGMessageField * errFields
Definition: libpq-int.h:198
bool resultInitialized
Definition: libpq-int.h:165
PGresult_data * next
Definition: libpq-int.h:106
int nEvents
Definition: libpq-int.h:189
PGresAttDesc * attDescs
Definition: libpq-int.h:172
PGresAttValue ** tuples
Definition: libpq-int.h:173
PGresult_data * curBlock
Definition: libpq-int.h:209
#define free(a)
Definition: header.h:65
PGresParamDesc * paramDescs
Definition: libpq-int.h:177
PGEventProc proc
Definition: libpq-int.h:161
int i
void * passThrough
Definition: libpq-int.h:163
PGEvent * events
Definition: libpq-int.h:188
char * name
Definition: libpq-int.h:162

◆ PQclientEncoding()

int PQclientEncoding ( const PGconn conn)

◆ PQcmdStatus()

char* PQcmdStatus ( PGresult res)

Definition at line 3519 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().

3520 {
3521  if (!res)
3522  return NULL;
3523  return res->cmdStatus;
3524 }
char cmdStatus[CMDSTATUS_LEN]
Definition: libpq-int.h:179

◆ PQcmdTuples()

char* PQcmdTuples ( PGresult res)

Definition at line 3589 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().

3590 {
3591  char *p,
3592  *c;
3593 
3594  if (!res)
3595  return "";
3596 
3597  if (strncmp(res->cmdStatus, "INSERT ", 7) == 0)
3598  {
3599  p = res->cmdStatus + 7;
3600  /* INSERT: skip oid and space */
3601  while (*p && *p != ' ')
3602  p++;
3603  if (*p == 0)
3604  goto interpret_error; /* no space? */
3605  p++;
3606  }
3607  else if (strncmp(res->cmdStatus, "SELECT ", 7) == 0 ||
3608  strncmp(res->cmdStatus, "DELETE ", 7) == 0 ||
3609  strncmp(res->cmdStatus, "UPDATE ", 7) == 0)
3610  p = res->cmdStatus + 7;
3611  else if (strncmp(res->cmdStatus, "FETCH ", 6) == 0)
3612  p = res->cmdStatus + 6;
3613  else if (strncmp(res->cmdStatus, "MOVE ", 5) == 0 ||
3614  strncmp(res->cmdStatus, "COPY ", 5) == 0)
3615  p = res->cmdStatus + 5;
3616  else
3617  return "";
3618 
3619  /* check that we have an integer (at least one digit, nothing else) */
3620  for (c = p; *c; c++)
3621  {
3622  if (!isdigit((unsigned char) *c))
3623  goto interpret_error;
3624  }
3625  if (c == p)
3626  goto interpret_error;
3627 
3628  return p;
3629 
3630 interpret_error:
3632  "could not interpret result from server: %s",
3633  res->cmdStatus);
3634  return "";
3635 }
PGNoticeHooks noticeHooks
Definition: libpq-int.h:187
char * c
void pqInternalNotice(const PGNoticeHooks *hooks, const char *fmt,...)
Definition: fe-exec.c:839
char cmdStatus[CMDSTATUS_LEN]
Definition: libpq-int.h:179

◆ PQconndefaults()

PQconninfoOption* PQconndefaults ( void  )

Definition at line 1472 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().

1473 {
1474  PQExpBufferData errorBuf;
1475  PQconninfoOption *connOptions;
1476 
1477  /* We don't actually report any errors here, but callees want a buffer */
1478  initPQExpBuffer(&errorBuf);
1479  if (PQExpBufferDataBroken(errorBuf))
1480  return NULL; /* out of memory already :-( */
1481 
1482  connOptions = conninfo_init(&errorBuf);
1483  if (connOptions != NULL)
1484  {
1485  /* pass NULL errorBuf to ignore errors */
1486  if (!conninfo_add_defaults(connOptions, NULL))
1487  {
1488  PQconninfoFree(connOptions);
1489  connOptions = NULL;
1490  }
1491  }
1492 
1493  termPQExpBuffer(&errorBuf);
1494  return connOptions;
1495 }
void termPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:131
static PQconninfoOption * conninfo_init(PQExpBuffer errorMessage)
Definition: fe-connect.c:5359
void PQconninfoFree(PQconninfoOption *connOptions)
Definition: fe-connect.c:6572
#define PQExpBufferDataBroken(buf)
Definition: pqexpbuffer.h:67
static bool conninfo_add_defaults(PQconninfoOption *options, PQExpBuffer errorMessage)
Definition: fe-connect.c:5795
void initPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:92

◆ PQconnectdb()

PGconn* PQconnectdb ( const char *  conninfo)

Definition at line 713 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().

714 {
715  PGconn *conn = PQconnectStart(conninfo);
716 
717  if (conn && conn->status != CONNECTION_BAD)
718  (void) connectDBComplete(conn);
719 
720  return conn;
721 }
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:841
ConnStatusType status
Definition: libpq-int.h:410

◆ PQconnectdbParams()

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

Definition at line 657 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().

660 {
661  PGconn *conn = PQconnectStartParams(keywords, values, expand_dbname);
662 
663  if (conn && conn->status != CONNECTION_BAD)
664  (void) connectDBComplete(conn);
665 
666  return conn;
667 
668 }
PGconn * conn
Definition: streamutil.c:54
static int connectDBComplete(PGconn *conn)
Definition: fe-connect.c:2110
ConnStatusType status
Definition: libpq-int.h:410
static Datum values[MAXATTR]
Definition: bootstrap.c:156
PGconn * PQconnectStartParams(const char *const *keywords, const char *const *values, int expand_dbname)
Definition: fe-connect.c:760

◆ PQconnectionNeedsPassword()

int PQconnectionNeedsPassword ( const PGconn conn)

Definition at line 6795 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().

6796 {
6797  char *password;
6798 
6799  if (!conn)
6800  return false;
6801  password = PQpass(conn);
6802  if (conn->password_needed &&
6803  (password == NULL || password[0] == '\0'))
6804  return true;
6805  else
6806  return false;
6807 }
bool password_needed
Definition: libpq-int.h:451
char * PQpass(const PGconn *conn)
Definition: fe-connect.c:6606
static char * password
Definition: streamutil.c:53

◆ PQconnectionUsedPassword()

int PQconnectionUsedPassword ( const PGconn conn)

Definition at line 6810 of file fe-connect.c.

References pg_conn::password_needed.

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

6811 {
6812  if (!conn)
6813  return false;
6814  if (conn->password_needed)
6815  return true;
6816  else
6817  return false;
6818 }
bool password_needed
Definition: libpq-int.h:451

◆ 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, resetPQExpBuffer(), 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("%s(%s) failed: %s\n"),
2636  "setsockopt",
2637  "SO_KEEPALIVE",
2638  SOCK_STRERROR(SOCK_ERRNO, sebuf, sizeof(sebuf)));
2639  err = 1;
2640  }
2641  else if (!setKeepalivesIdle(conn)
2642  || !setKeepalivesInterval(conn)
2643  || !setKeepalivesCount(conn))
2644  err = 1;
2645 #else /* WIN32 */
2646 #ifdef SIO_KEEPALIVE_VALS
2647  else if (!setKeepalivesWin32(conn))
2648  err = 1;
2649 #endif /* SIO_KEEPALIVE_VALS */
2650 #endif /* WIN32 */
2651  else if (!setTCPUserTimeout(conn))
2652  err = 1;
2653 
2654  if (err)
2655  {
2656  conn->try_next_addr = true;
2657  goto keep_going;
2658  }
2659  }
2660 
2661  /*----------
2662  * We have three methods of blocking SIGPIPE during
2663  * send() calls to this socket:
2664  *
2665  * - setsockopt(sock, SO_NOSIGPIPE)
2666  * - send(sock, ..., MSG_NOSIGNAL)
2667  * - setting the signal mask to SIG_IGN during send()
2668  *
2669  * The third method requires three syscalls per send,
2670  * so we prefer either of the first two, but they are
2671  * less portable. The state is tracked in the following
2672  * members of PGconn:
2673  *
2674  * conn->sigpipe_so - we have set up SO_NOSIGPIPE
2675  * conn->sigpipe_flag - we're specifying MSG_NOSIGNAL
2676  *
2677  * If we can use SO_NOSIGPIPE, then set sigpipe_so here
2678  * and we're done. Otherwise, set sigpipe_flag so that
2679  * we will try MSG_NOSIGNAL on sends. If we get an error
2680  * with MSG_NOSIGNAL, we'll clear that flag and revert to
2681  * signal masking.
2682  *----------
2683  */
2684  conn->sigpipe_so = false;
2685 #ifdef MSG_NOSIGNAL
2686  conn->sigpipe_flag = true;
2687 #else
2688  conn->sigpipe_flag = false;
2689 #endif /* MSG_NOSIGNAL */
2690 
2691 #ifdef SO_NOSIGPIPE
2692  optval = 1;
2693  if (setsockopt(conn->sock, SOL_SOCKET, SO_NOSIGPIPE,
2694  (char *) &optval, sizeof(optval)) == 0)
2695  {
2696  conn->sigpipe_so = true;
2697  conn->sigpipe_flag = false;
2698  }
2699 #endif /* SO_NOSIGPIPE */
2700 
2701  /*
2702  * Start/make connection. This should not block, since we
2703  * are in nonblock mode. If it does, well, too bad.
2704  */
2705  if (connect(conn->sock, addr_cur->ai_addr,
2706  addr_cur->ai_addrlen) < 0)
2707  {
2708  if (SOCK_ERRNO == EINPROGRESS ||
2709 #ifdef WIN32
2710  SOCK_ERRNO == EWOULDBLOCK ||
2711 #endif
2712  SOCK_ERRNO == EINTR)
2713  {
2714  /*
2715  * This is fine - we're in non-blocking mode, and
2716  * the connection is in progress. Tell caller to
2717  * wait for write-ready on socket.
2718  */
2719  conn->status = CONNECTION_STARTED;
2720  return PGRES_POLLING_WRITING;
2721  }
2722  /* otherwise, trouble */
2723  }
2724  else
2725  {
2726  /*
2727  * Hm, we're connected already --- seems the "nonblock
2728  * connection" wasn't. Advance the state machine and
2729  * go do the next stuff.
2730  */
2731  conn->status = CONNECTION_STARTED;
2732  goto keep_going;
2733  }
2734 
2735  /*
2736  * This connection failed. Add the error report to
2737  * conn->errorMessage, then try the next address if any.
2738  */
2740  conn->try_next_addr = true;
2741  goto keep_going;
2742  }
2743  }
2744 
2745  case CONNECTION_STARTED:
2746  {
2747  ACCEPT_TYPE_ARG3 optlen = sizeof(optval);
2748 
2749  /*
2750  * Write ready, since we've made it here, so the connection
2751  * has been made ... or has failed.
2752  */
2753 
2754  /*
2755  * Now check (using getsockopt) that there is not an error
2756  * state waiting for us on the socket.
2757  */
2758 
2759  if (getsockopt(conn->sock, SOL_SOCKET, SO_ERROR,
2760  (char *) &optval, &optlen) == -1)
2761  {
2763  libpq_gettext("could not get socket error status: %s\n"),
2764  SOCK_STRERROR(SOCK_ERRNO, sebuf, sizeof(sebuf)));
2765  goto error_return;
2766  }
2767  else if (optval != 0)
2768  {
2769  /*
2770  * When using a nonblocking connect, we will typically see
2771  * connect failures at this point, so provide a friendly
2772  * error message.
2773  */
2774  connectFailureMessage(conn, optval);
2775 
2776  /*
2777  * Try the next address if any, just as in the case where
2778  * connect() returned failure immediately.
2779  */
2780  conn->try_next_addr = true;
2781  goto keep_going;
2782  }
2783 
2784  /* Fill in the client address */
2785  conn->laddr.salen = sizeof(conn->laddr.addr);
2786  if (getsockname(conn->sock,
2787  (struct sockaddr *) &conn->laddr.addr,
2788  &conn->laddr.salen) < 0)
2789  {
2791  libpq_gettext("could not get client address from socket: %s\n"),
2792  SOCK_STRERROR(SOCK_ERRNO, sebuf, sizeof(sebuf)));
2793  goto error_return;
2794  }
2795 
2796  /*
2797  * Make sure we can write before advancing to next step.
2798  */
2799  conn->status = CONNECTION_MADE;
2800  return PGRES_POLLING_WRITING;
2801  }
2802 
2803  case CONNECTION_MADE:
2804  {
2805  char *startpacket;
2806  int packetlen;
2807 
2808  /*
2809  * Implement requirepeer check, if requested and it's a
2810  * Unix-domain socket.
2811  */
2812  if (conn->requirepeer && conn->requirepeer[0] &&
2813  IS_AF_UNIX(conn->raddr.addr.ss_family))
2814  {
2815 #ifndef WIN32
2816  char pwdbuf[BUFSIZ];
2817  struct passwd pass_buf;
2818  struct passwd *pass;
2819  int passerr;
2820 #endif
2821  uid_t uid;
2822  gid_t gid;
2823 
2824  errno = 0;
2825  if (getpeereid(conn->sock, &uid, &gid) != 0)
2826  {
2827  /*
2828  * Provide special error message if getpeereid is a
2829  * stub
2830  */
2831  if (errno == ENOSYS)
2833  libpq_gettext("requirepeer parameter is not supported on this platform\n"));
2834  else
2836  libpq_gettext("could not get peer credentials: %s\n"),
2837  strerror_r(errno, sebuf, sizeof(sebuf)));
2838  goto error_return;
2839  }
2840 
2841 #ifndef WIN32
2842  passerr = pqGetpwuid(uid, &pass_buf, pwdbuf, sizeof(pwdbuf), &pass);
2843  if (pass == NULL)
2844  {
2845  if (passerr != 0)
2847  libpq_gettext("could not look up local user ID %d: %s\n"),
2848  (int) uid,
2849  strerror_r(passerr, sebuf, sizeof(sebuf)));
2850  else
2852  libpq_gettext("local user with ID %d does not exist\n"),
2853  (int) uid);
2854  goto error_return;
2855  }
2856 
2857  if (strcmp(pass->pw_name, conn->requirepeer) != 0)
2858  {
2860  libpq_gettext("requirepeer specifies \"%s\", but actual peer user name is \"%s\"\n"),
2861  conn->requirepeer, pass->pw_name);
2862  goto error_return;
2863  }
2864 #else /* WIN32 */
2865  /* should have failed with ENOSYS above */
2866  Assert(false);
2867 #endif /* WIN32 */
2868  }
2869 
2870  if (IS_AF_UNIX(conn->raddr.addr.ss_family))
2871  {
2872  /* Don't request SSL or GSSAPI over Unix sockets */
2873 #ifdef USE_SSL
2874  conn->allow_ssl_try = false;
2875 #endif
2876 #ifdef ENABLE_GSS
2877  conn->try_gss = false;
2878 #endif
2879  }
2880 
2881 #ifdef ENABLE_GSS
2882 
2883  /*
2884  * If GSSAPI encryption is enabled, then call
2885  * pg_GSS_have_cred_cache() which will return true if we can
2886  * acquire credentials (and give us a handle to use in
2887  * conn->gcred), and then send a packet to the server asking
2888  * for GSSAPI Encryption (and skip past SSL negotiation and
2889  * regular startup below).
2890  */
2891  if (conn->try_gss && !conn->gctx)
2892  conn->try_gss = pg_GSS_have_cred_cache(&conn->gcred);
2893  if (conn->try_gss && !conn->gctx)
2894  {
2896 
2897  if (pqPacketSend(conn, 0, &pv, sizeof(pv)) != STATUS_OK)
2898  {
2900  libpq_gettext("could not send GSSAPI negotiation packet: %s\n"),
2901  SOCK_STRERROR(SOCK_ERRNO, sebuf, sizeof(sebuf)));
2902  goto error_return;
2903  }
2904 
2905  /* Ok, wait for response */
2907  return PGRES_POLLING_READING;
2908  }
2909  else if (!conn->gctx && conn->gssencmode[0] == 'r')
2910  {
2912  libpq_gettext("GSSAPI encryption required but was impossible (possibly no credential cache, no server support, or using a local socket)\n"));
2913  goto error_return;
2914  }
2915 #endif
2916 
2917 #ifdef USE_SSL
2918 
2919  /*
2920  * Enable the libcrypto callbacks before checking if SSL needs
2921  * to be done. This is done before sending the startup packet
2922  * as depending on the type of authentication done, like MD5
2923  * or SCRAM that use cryptohashes, the callbacks would be
2924  * required even without a SSL connection
2925  */
2926  if (pqsecure_initialize(conn, false, true) < 0)
2927  goto error_return;
2928 
2929  /*
2930  * If SSL is enabled and we haven't already got encryption of
2931  * some sort running, request SSL instead of sending the
2932  * startup message.
2933  */
2934  if (conn->allow_ssl_try && !conn->wait_ssl_try &&
2935  !conn->ssl_in_use
2936 #ifdef ENABLE_GSS
2937  && !conn->gssenc
2938 #endif
2939  )
2940  {
2941  ProtocolVersion pv;
2942 
2943  /*
2944  * Send the SSL request packet.
2945  *
2946  * Theoretically, this could block, but it really
2947  * shouldn't since we only got here if the socket is
2948  * write-ready.
2949  */
2951  if (pqPacketSend(conn, 0, &pv, sizeof(pv)) != STATUS_OK)
2952  {
2954  libpq_gettext("could not send SSL negotiation packet: %s\n"),
2955  SOCK_STRERROR(SOCK_ERRNO, sebuf, sizeof(sebuf)));
2956  goto error_return;
2957  }
2958  /* Ok, wait for response */
2960  return PGRES_POLLING_READING;
2961  }
2962 #endif /* USE_SSL */
2963 
2964  /*
2965  * Build the startup packet.
2966  */
2967  startpacket = pqBuildStartupPacket3(conn, &packetlen,
2969  if (!startpacket)
2970  {
2972  libpq_gettext("out of memory\n"));
2973  goto error_return;
2974  }
2975 
2976  /*
2977  * Send the startup packet.
2978  *
2979  * Theoretically, this could block, but it really shouldn't
2980  * since we only got here if the socket is write-ready.
2981  */
2982  if (pqPacketSend(conn, 0, startpacket, packetlen) != STATUS_OK)
2983  {
2985  libpq_gettext("could not send startup packet: %s\n"),
2986  SOCK_STRERROR(SOCK_ERRNO, sebuf, sizeof(sebuf)));
2987  free(startpacket);
2988  goto error_return;
2989  }
2990 
2991  free(startpacket);
2992 
2994  return PGRES_POLLING_READING;
2995  }
2996 
2997  /*
2998  * Handle SSL negotiation: wait for postmaster messages and
2999  * respond as necessary.
3000  */
3002  {
3003 #ifdef USE_SSL
3004  PostgresPollingStatusType pollres;
3005 
3006  /*
3007  * On first time through, get the postmaster's response to our
3008  * SSL negotiation packet.
3009  */
3010  if (!conn->ssl_in_use)
3011  {
3012  /*
3013  * We use pqReadData here since it has the logic to
3014  * distinguish no-data-yet from connection closure. Since
3015  * conn->ssl isn't set, a plain recv() will occur.
3016  */
3017  char SSLok;
3018  int rdresult;
3019 
3020  rdresult = pqReadData(conn);
3021  if (rdresult < 0)
3022  {
3023  /* errorMessage is already filled in */
3024  goto error_return;
3025  }
3026  if (rdresult == 0)
3027  {
3028  /* caller failed to wait for data */
3029  return PGRES_POLLING_READING;
3030  }
3031  if (pqGetc(&SSLok, conn) < 0)
3032  {
3033  /* should not happen really */
3034  return PGRES_POLLING_READING;
3035  }
3036  if (SSLok == 'S')
3037  {
3038  /* mark byte consumed */
3039  conn->inStart = conn->inCursor;
3040 
3041  /*
3042  * Set up global SSL state if required. The crypto
3043  * state has already been set if libpq took care of
3044  * doing that, so there is no need to make that happen
3045  * again.
3046  */
3047  if (pqsecure_initialize(conn, true, false) != 0)
3048  goto error_return;
3049  }
3050  else if (SSLok == 'N')
3051  {
3052  /* mark byte consumed */
3053  conn->inStart = conn->inCursor;
3054  /* OK to do without SSL? */
3055  if (conn->sslmode[0] == 'r' || /* "require" */
3056  conn->sslmode[0] == 'v') /* "verify-ca" or
3057  * "verify-full" */
3058  {
3059  /* Require SSL, but server does not want it */
3061  libpq_gettext("server does not support SSL, but SSL was required\n"));
3062  goto error_return;
3063  }
3064  /* Otherwise, proceed with normal startup */
3065  conn->allow_ssl_try = false;
3066  /* We can proceed using this connection */
3067  conn->status = CONNECTION_MADE;
3068  return PGRES_POLLING_WRITING;
3069  }
3070  else if (SSLok == 'E')
3071  {
3072  /*
3073  * Server failure of some sort, such as failure to
3074  * fork a backend process. We need to process and
3075  * report the error message, which might be formatted
3076  * according to either protocol 2 or protocol 3.
3077  * Rather than duplicate the code for that, we flip
3078  * into AWAITING_RESPONSE state and let the code there
3079  * deal with it. Note we have *not* consumed the "E"
3080  * byte here.
3081  */
3083  goto keep_going;
3084  }
3085  else
3086  {
3088  libpq_gettext("received invalid response to SSL negotiation: %c\n"),
3089  SSLok);
3090  goto error_return;
3091  }
3092  }
3093 
3094  /*
3095  * Begin or continue the SSL negotiation process.
3096  */
3097  pollres = pqsecure_open_client(conn);
3098  if (pollres == PGRES_POLLING_OK)
3099  {
3100  /* SSL handshake done, ready to send startup packet */
3101  conn->status = CONNECTION_MADE;
3102  return PGRES_POLLING_WRITING;
3103  }
3104  if (pollres == PGRES_POLLING_FAILED)
3105  {
3106  /*
3107  * Failed ... if sslmode is "prefer" then do a non-SSL
3108  * retry
3109  */
3110  if (conn->sslmode[0] == 'p' /* "prefer" */
3111  && conn->allow_ssl_try /* redundant? */
3112  && !conn->wait_ssl_try) /* redundant? */
3113  {
3114  /* only retry once */
3115  conn->allow_ssl_try = false;
3116  need_new_connection = true;
3117  goto keep_going;
3118  }
3119  /* Else it's a hard failure */
3120  goto error_return;
3121  }
3122  /* Else, return POLLING_READING or POLLING_WRITING status */
3123  return pollres;
3124 #else /* !USE_SSL */
3125  /* can't get here */
3126  goto error_return;
3127 #endif /* USE_SSL */
3128  }
3129 
3131  {
3132 #ifdef ENABLE_GSS
3133  PostgresPollingStatusType pollres;
3134 
3135  /*
3136  * If we haven't yet, get the postmaster's response to our
3137  * negotiation packet
3138  */
3139  if (conn->try_gss && !conn->gctx)
3140  {
3141  char gss_ok;
3142  int rdresult = pqReadData(conn);
3143 
3144  if (rdresult < 0)
3145  /* pqReadData fills in error message */
3146  goto error_return;
3147  else if (rdresult == 0)
3148  /* caller failed to wait for data */
3149  return PGRES_POLLING_READING;
3150  if (pqGetc(&gss_ok, conn) < 0)
3151  /* shouldn't happen... */
3152  return PGRES_POLLING_READING;
3153 
3154  if (gss_ok == 'E')
3155  {
3156  /*
3157  * Server failure of some sort. Assume it's a
3158  * protocol version support failure, and let's see if
3159  * we can't recover (if it's not, we'll get a better
3160  * error message on retry). Server gets fussy if we
3161  * don't hang up the socket, though.
3162  */
3163  conn->try_gss = false;
3164  need_new_connection = true;
3165  goto keep_going;
3166  }
3167 
3168  /* mark byte consumed */
3169  conn->inStart = conn->inCursor;
3170 
3171  if (gss_ok == 'N')
3172  {
3173  /* Server doesn't want GSSAPI; fall back if we can */
3174  if (conn->gssencmode[0] == 'r')
3175  {
3177  libpq_gettext("server doesn't support GSSAPI encryption, but it was required\n"));
3178  goto error_return;
3179  }
3180 
3181  conn->try_gss = false;
3182  /* We can proceed using this connection */
3183  conn->status = CONNECTION_MADE;
3184  return PGRES_POLLING_WRITING;
3185  }
3186  else if (gss_ok != 'G')
3187  {
3189  libpq_gettext("received invalid response to GSSAPI negotiation: %c\n"),
3190  gss_ok);
3191  goto error_return;
3192  }
3193  }
3194 
3195  /* Begin or continue GSSAPI negotiation */
3196  pollres = pqsecure_open_gss(conn);
3197  if (pollres == PGRES_POLLING_OK)
3198  {
3199  /* All set for startup packet */
3200  conn->status = CONNECTION_MADE;
3201  return PGRES_POLLING_WRITING;
3202  }
3203  else if (pollres == PGRES_POLLING_FAILED &&
3204  conn->gssencmode[0] == 'p')
3205  {
3206  /*
3207  * We failed, but we can retry on "prefer". Have to drop
3208  * the current connection to do so, though.
3209  */
3210  conn->try_gss = false;
3211  need_new_connection = true;
3212  goto keep_going;
3213  }
3214  return pollres;
3215 #else /* !ENABLE_GSS */
3216  /* unreachable */
3217  goto error_return;
3218 #endif /* ENABLE_GSS */
3219  }
3220 
3221  /*
3222  * Handle authentication exchange: wait for postmaster messages
3223  * and respond as necessary.
3224  */
3226  {
3227  char beresp;
3228  int msgLength;
3229  int avail;
3230  AuthRequest areq;
3231  int res;
3232 
3233  /*
3234  * Scan the message from current point (note that if we find
3235  * the message is incomplete, we will return without advancing
3236  * inStart, and resume here next time).
3237  */
3238  conn->inCursor = conn->inStart;
3239 
3240  /* Read type byte */
3241  if (pqGetc(&beresp, conn))
3242  {
3243  /* We'll come back when there is more data */
3244  return PGRES_POLLING_READING;
3245  }
3246 
3247  /*
3248  * Validate message type: we expect only an authentication
3249  * request or an error here. Anything else probably means
3250  * it's not Postgres on the other end at all.
3251  */
3252  if (!(beresp == 'R' || beresp == 'E'))
3253  {
3255  libpq_gettext("expected authentication request from server, but received %c\n"),
3256  beresp);
3257  goto error_return;
3258  }
3259 
3260  /* Read message length word */
3261  if (pqGetInt(&msgLength, 4, conn))
3262  {
3263  /* We'll come back when there is more data */
3264  return PGRES_POLLING_READING;
3265  }
3266 
3267  /*
3268  * Try to validate message length before using it.
3269  * Authentication requests can't be very large, although GSS
3270  * auth requests may not be that small. Errors can be a
3271  * little larger, but not huge. If we see a large apparent
3272  * length in an error, it means we're really talking to a
3273  * pre-3.0-protocol server; cope. (Before version 14, the
3274  * server also used the old protocol for errors that happened
3275  * before processing the startup packet.)
3276  */
3277  if (beresp == 'R' && (msgLength < 8 || msgLength > 2000))
3278  {
3280  libpq_gettext("expected authentication request from server, but received %c\n"),
3281  beresp);
3282  goto error_return;
3283  }
3284 
3285  if (beresp == 'E' && (msgLength < 8 || msgLength > 30000))
3286  {
3287  /* Handle error from a pre-3.0 server */
3288  conn->inCursor = conn->inStart + 1; /* reread data */
3289  if (pqGets_append(&conn->errorMessage, conn))
3290  {
3291  /* We'll come back when there is more data */
3292  return PGRES_POLLING_READING;
3293  }
3294  /* OK, we read the message; mark data consumed */
3295  conn->inStart = conn->inCursor;
3296 
3297  /*
3298  * Before 7.2, the postmaster didn't always end its
3299  * messages with a newline, so add one if needed to
3300  * conform to libpq conventions.
3301  */
3302  if (conn->errorMessage.len == 0 ||
3303  conn->errorMessage.data[conn->errorMessage.len - 1] != '\n')
3304  {
3305  appendPQExpBufferChar(&conn->errorMessage, '\n');
3306  }
3307 
3308  goto error_return;
3309  }
3310 
3311  /*
3312  * Can't process if message body isn't all here yet.
3313  */
3314  msgLength -= 4;
3315  avail = conn->inEnd - conn->inCursor;
3316  if (avail < msgLength)
3317  {
3318  /*
3319  * Before returning, try to enlarge the input buffer if
3320  * needed to hold the whole message; see notes in
3321  * pqParseInput3.
3322  */
3323  if (pqCheckInBufferSpace(conn->inCursor + (size_t) msgLength,
3324  conn))
3325  goto error_return;
3326  /* We'll come back when there is more data */
3327  return PGRES_POLLING_READING;
3328  }
3329 
3330  /* Handle errors. */
3331  if (beresp == 'E')
3332  {
3333  if (pqGetErrorNotice3(conn, true))
3334  {
3335  /* We'll come back when there is more data */
3336  return PGRES_POLLING_READING;
3337  }
3338  /* OK, we read the message; mark data consumed */
3339  conn->inStart = conn->inCursor;
3340 
3341  /*
3342  * If error is "cannot connect now", try the next host if
3343  * any (but we don't want to consider additional addresses
3344  * for this host, nor is there much point in changing SSL
3345  * or GSS mode). This is helpful when dealing with
3346  * standby servers that might not be in hot-standby state.
3347  */
3348  if (strcmp(conn->last_sqlstate,
3350  {
3351  conn->try_next_host = true;
3352  goto keep_going;
3353  }
3354 
3355  /* Check to see if we should mention pgpassfile */
3356  pgpassfileWarning(conn);
3357 
3358 #ifdef ENABLE_GSS
3359 
3360  /*
3361  * If gssencmode is "prefer" and we're using GSSAPI, retry
3362  * without it.
3363  */
3364  if (conn->gssenc && conn->gssencmode[0] == 'p')
3365  {
3366  /* only retry once */
3367  conn->try_gss = false;
3368  need_new_connection = true;
3369  goto keep_going;
3370  }
3371 #endif
3372 
3373 #ifdef USE_SSL
3374 
3375  /*
3376  * if sslmode is "allow" and we haven't tried an SSL
3377  * connection already, then retry with an SSL connection
3378  */
3379  if (conn->sslmode[0] == 'a' /* "allow" */
3380  && !conn->ssl_in_use
3381  && conn->allow_ssl_try
3382  && conn->wait_ssl_try)
3383  {
3384  /* only retry once */
3385  conn->wait_ssl_try = false;
3386  need_new_connection = true;
3387  goto keep_going;
3388  }
3389 
3390  /*
3391  * if sslmode is "prefer" and we're in an SSL connection,
3392  * then do a non-SSL retry
3393  */
3394  if (conn->sslmode[0] == 'p' /* "prefer" */
3395  && conn->ssl_in_use
3396  && conn->allow_ssl_try /* redundant? */
3397  && !conn->wait_ssl_try) /* redundant? */
3398  {
3399  /* only retry once */
3400  conn->allow_ssl_try = false;
3401  need_new_connection = true;
3402  goto keep_going;
3403  }
3404 #endif
3405 
3406  goto error_return;
3407  }
3408 
3409  /* It is an authentication request. */
3410  conn->auth_req_received = true;
3411 
3412  /* Get the type of request. */
3413  if (pqGetInt((int *) &areq, 4, conn))
3414  {
3415  /* We'll come back when there are more data */
3416  return PGRES_POLLING_READING;
3417  }
3418  msgLength -= 4;
3419 
3420  /*
3421  * Process the rest of the authentication request message, and
3422  * respond to it if necessary.
3423  *
3424  * Note that conn->pghost must be non-NULL if we are going to
3425  * avoid the Kerberos code doing a hostname look-up.
3426  */
3427  res = pg_fe_sendauth(areq, msgLength, conn);
3428 
3429  /* OK, we have processed the message; mark data consumed */
3430  conn->inStart = conn->inCursor;
3431 
3432  if (res != STATUS_OK)
3433  goto error_return;
3434 
3435  /*
3436  * Just make sure that any data sent by pg_fe_sendauth is
3437  * flushed out. Although this theoretically could block, it
3438  * really shouldn't since we don't send large auth responses.
3439  */
3440  if (pqFlush(conn))
3441  goto error_return;
3442 
3443  if (areq == AUTH_REQ_OK)
3444  {
3445  /* We are done with authentication exchange */
3446  conn->status = CONNECTION_AUTH_OK;
3447 
3448  /*
3449  * Set asyncStatus so that PQgetResult will think that
3450  * what comes back next is the result of a query. See
3451  * below.
3452  */
3453  conn->asyncStatus = PGASYNC_BUSY;
3454  }
3455 
3456  /* Look to see if we have more data yet. */
3457  goto keep_going;
3458  }
3459 
3460  case CONNECTION_AUTH_OK:
3461  {
3462  /*
3463  * Now we expect to hear from the backend. A ReadyForQuery
3464  * message indicates that startup is successful, but we might
3465  * also get an Error message indicating failure. (Notice
3466  * messages indicating nonfatal warnings are also allowed by
3467  * the protocol, as are ParameterStatus and BackendKeyData
3468  * messages.) Easiest way to handle this is to let
3469  * PQgetResult() read the messages. We just have to fake it
3470  * out about the state of the connection, by setting
3471  * asyncStatus = PGASYNC_BUSY (done above).
3472  */
3473 
3474  if (PQisBusy(conn))
3475  return PGRES_POLLING_READING;
3476 
3477  res = PQgetResult(conn);
3478 
3479  /*
3480  * NULL return indicating we have gone to IDLE state is
3481  * expected
3482  */
3483  if (res)
3484  {
3485  if (res->resultStatus != PGRES_FATAL_ERROR)
3487  libpq_gettext("unexpected message from server during startup\n"));
3488  else if (conn->send_appname &&
3489  (conn->appname || conn->fbappname))
3490  {
3491  /*
3492  * If we tried to send application_name, check to see
3493  * if the error is about that --- pre-9.0 servers will
3494  * reject it at this stage of the process. If so,
3495  * close the connection and retry without sending
3496  * application_name. We could possibly get a false
3497  * SQLSTATE match here and retry uselessly, but there
3498  * seems no great harm in that; we'll just get the
3499  * same error again if it's unrelated.
3500  */
3501  const char *sqlstate;
3502 
3503  sqlstate = PQresultErrorField(res, PG_DIAG_SQLSTATE);
3504  if (sqlstate &&
3505  strcmp(sqlstate, ERRCODE_APPNAME_UNKNOWN) == 0)
3506  {
3507  PQclear(res);
3508  conn->send_appname = false;
3509  need_new_connection = true;
3510  goto keep_going;
3511  }
3512  }
3513 
3514  /*
3515  * if the resultStatus is FATAL, then conn->errorMessage
3516  * already has a copy of the error; needn't copy it back.
3517  * But add a newline if it's not there already, since
3518  * postmaster error messages may not have one.
3519  */
3520  if (conn->errorMessage.len <= 0 ||
3521  conn->errorMessage.data[conn->errorMessage.len - 1] != '\n')
3522  appendPQExpBufferChar(&conn->errorMessage, '\n');
3523  PQclear(res);
3524  goto error_return;
3525  }
3526 
3527  /* Almost there now ... */
3529  goto keep_going;
3530  }
3531 
3533  {
3534  /*
3535  * If a read-write, read-only, primary, or standby connection
3536  * is required, see if we have one.
3537  */
3540  {
3541  bool read_only_server;
3542 
3543  /*
3544  * If the server didn't report
3545  * "default_transaction_read_only" or "in_hot_standby" at
3546  * startup, we must determine its state by sending the
3547  * query "SHOW transaction_read_only". This GUC exists in
3548  * all server versions that support 3.0 protocol.
3549  */
3552  {
3553  /*
3554  * We use PQsendQueryContinue so that
3555  * conn->errorMessage does not get cleared. We need
3556  * to preserve any error messages related to previous
3557  * hosts we have tried and failed to connect to.
3558  */
3559  conn->status = CONNECTION_OK;
3560  if (!PQsendQueryContinue(conn,
3561  "SHOW transaction_read_only"))
3562  goto error_return;
3563  /* We'll return to this state when we have the answer */
3565  return PGRES_POLLING_READING;
3566  }
3567 
3568  /* OK, we can make the test */
3569  read_only_server =
3571  conn->in_hot_standby == PG_BOOL_YES);
3572 
3574  read_only_server : !read_only_server)
3575  {
3576  /* Wrong server state, reject and try the next host */
3579  libpq_gettext("session is read-only\n"));
3580  else
3582  libpq_gettext("session is not read-only\n"));
3583 
3584  /* Close connection politely. */
3585  conn->status = CONNECTION_OK;
3586  sendTerminateConn(conn);
3587 
3588  /*
3589  * Try next host if any, but we don't want to consider
3590  * additional addresses for this host.
3591  */
3592  conn->try_next_host = true;
3593  goto keep_going;
3594  }
3595  }
3596  else if (conn->target_server_type == SERVER_TYPE_PRIMARY ||
3599  {
3600  /*
3601  * If the server didn't report "in_hot_standby" at
3602  * startup, we must determine its state by sending the
3603  * query "SELECT pg_catalog.pg_is_in_recovery()". Servers
3604  * before 9.0 don't have that function, but by the same
3605  * token they don't have any standby mode, so we may just
3606  * assume the result.
3607  */
3608  if (conn->sversion < 90000)
3609  conn->in_hot_standby = PG_BOOL_NO;
3610 
3611  if (conn->in_hot_standby == PG_BOOL_UNKNOWN)
3612  {
3613  /*
3614  * We use PQsendQueryContinue so that
3615  * conn->errorMessage does not get cleared. We need
3616  * to preserve any error messages related to previous
3617  * hosts we have tried and failed to connect to.
3618  */
3619  conn->status = CONNECTION_OK;
3620  if (!PQsendQueryContinue(conn,
3621  "SELECT pg_catalog.pg_is_in_recovery()"))
3622  goto error_return;
3623  /* We'll return to this state when we have the answer */
3625  return PGRES_POLLING_READING;
3626  }
3627 
3628  /* OK, we can make the test */
3629  if ((conn->target_server_type == SERVER_TYPE_PRIMARY) ?
3630  (conn->in_hot_standby == PG_BOOL_YES) :
3631  (conn->in_hot_standby == PG_BOOL_NO))
3632  {
3633  /* Wrong server state, reject and try the next host */
3636  libpq_gettext("server is in hot standby mode\n"));
3637  else
3639  libpq_gettext("server is not in hot standby mode\n"));
3640 
3641  /* Close connection politely. */
3642  conn->status = CONNECTION_OK;
3643  sendTerminateConn(conn);
3644 
3645  /*
3646  * Try next host if any, but we don't want to consider
3647  * additional addresses for this host.
3648  */
3649  conn->try_next_host = true;
3650  goto keep_going;
3651  }
3652  }
3653 
3654  /* We can release the address list now. */
3655  release_conn_addrinfo(conn);
3656 
3657  /*
3658  * Contents of conn->errorMessage are no longer interesting
3659  * (and it seems some clients expect it to be empty after a
3660  * successful connection).
3661  */
3663 
3664  /* We are open for business! */
3665  conn->status = CONNECTION_OK;
3666  return PGRES_POLLING_OK;
3667  }
3668 
3669  case CONNECTION_CONSUME:
3670  {
3671  /*
3672  * This state just makes sure the connection is idle after
3673  * we've obtained the result of a SHOW or SELECT query. Once
3674  * we're clear, return to CONNECTION_CHECK_TARGET state to
3675  * decide what to do next. We must transiently set status =
3676  * CONNECTION_OK in order to use the result-consuming
3677  * subroutines.
3678  */
3679  conn->status = CONNECTION_OK;
3680  if (!PQconsumeInput(conn))
3681  goto error_return;
3682 
3683  if (PQisBusy(conn))
3684  {
3685  conn->status = CONNECTION_CONSUME;
3686  return PGRES_POLLING_READING;
3687  }
3688 
3689  /* Call PQgetResult() again until we get a NULL result */
3690  res = PQgetResult(conn);
3691  if (res != NULL)
3692  {
3693  PQclear(res);
3694  conn->status = CONNECTION_CONSUME;
3695  return PGRES_POLLING_READING;
3696  }
3697 
3699  goto keep_going;
3700  }
3701 
3703  {
3704  /*
3705  * Waiting for result of "SHOW transaction_read_only". We
3706  * must transiently set status = CONNECTION_OK in order to use
3707  * the result-consuming subroutines.
3708  */
3709  conn->status = CONNECTION_OK;
3710  if (!PQconsumeInput(conn))
3711  goto error_return;
3712 
3713  if (PQisBusy(conn))
3714  {
3716  return PGRES_POLLING_READING;
3717  }
3718 
3719  res = PQgetResult(conn);
3720  if (res && PQresultStatus(res) == PGRES_TUPLES_OK &&
3721  PQntuples(res) == 1)
3722  {
3723  char *val = PQgetvalue(res, 0, 0);
3724 
3725  /*
3726  * "transaction_read_only = on" proves that at least one
3727  * of default_transaction_read_only and in_hot_standby is
3728  * on, but we don't actually know which. We don't care
3729  * though for the purpose of identifying a read-only
3730  * session, so satisfy the CONNECTION_CHECK_TARGET code by
3731  * claiming they are both on. On the other hand, if it's
3732  * a read-write session, they are certainly both off.
3733  */
3734  if (strncmp(val, "on", 2) == 0)
3735  {
3737  conn->in_hot_standby = PG_BOOL_YES;
3738  }
3739  else
3740  {
3742  conn->in_hot_standby = PG_BOOL_NO;
3743  }
3744  PQclear(res);
3745 
3746  /* Finish reading messages before continuing */
3747  conn->status = CONNECTION_CONSUME;
3748  goto keep_going;
3749  }
3750 
3751  /* Something went wrong with "SHOW transaction_read_only". */
3752  if (res)
3753  PQclear(res);
3754 
3755  /* Append error report to conn->errorMessage. */
3757  libpq_gettext("\"%s\" failed\n"),
3758  "SHOW transaction_read_only");
3759 
3760  /* Close connection politely. */
3761  conn->status = CONNECTION_OK;
3762  sendTerminateConn(conn);
3763 
3764  /* Try next host. */
3765  conn->try_next_host = true;
3766  goto keep_going;
3767  }
3768 
3770  {
3771  /*
3772  * Waiting for result of "SELECT pg_is_in_recovery()". We
3773  * must transiently set status = CONNECTION_OK in order to use
3774  * the result-consuming subroutines.
3775  */
3776  conn->status = CONNECTION_OK;
3777  if (!PQconsumeInput(conn))
3778  goto error_return;
3779 
3780  if (PQisBusy(conn))
3781  {
3783  return PGRES_POLLING_READING;
3784  }
3785 
3786  res = PQgetResult(conn);
3787  if (res && PQresultStatus(res) == PGRES_TUPLES_OK &&
3788  PQntuples(res) == 1)
3789  {
3790  char *val = PQgetvalue(res, 0, 0);
3791 
3792  if (strncmp(val, "t", 1) == 0)
3793  conn->in_hot_standby = PG_BOOL_YES;
3794  else
3795  conn->in_hot_standby = PG_BOOL_NO;
3796  PQclear(res);
3797 
3798  /* Finish reading messages before continuing */
3799  conn->status = CONNECTION_CONSUME;
3800  goto keep_going;
3801  }
3802 
3803  /* Something went wrong with "SELECT pg_is_in_recovery()". */
3804  if (res)
3805  PQclear(res);
3806 
3807  /* Append error report to conn->errorMessage. */
3809  libpq_gettext("\"%s\" failed\n"),
3810  "SELECT pg_is_in_recovery()");
3811 
3812  /* Close connection politely. */
3813  conn->status = CONNECTION_OK;
3814  sendTerminateConn(conn);
3815 
3816  /* Try next host. */
3817  conn->try_next_host = true;
3818  goto keep_going;
3819  }
3820 
3821  default:
3823  libpq_gettext("invalid connection state %d, "
3824  "probably indicative of memory corruption\n"),
3825  conn->status);
3826  goto error_return;
3827  }
3828 
3829  /* Unreachable */
3830 
3831 error_return:
3832 
3833  /*
3834  * We used to close the socket at this point, but that makes it awkward
3835  * for those above us if they wish to remove this socket from their own
3836  * records (an fd_set for example). We'll just have this socket closed
3837  * when PQfinish is called (which is compulsory even after an error, since
3838  * the connection structure must be freed).
3839  */
3840  conn->status = CONNECTION_BAD;
3841  return PGRES_POLLING_FAILED;
3842 }
int pqFlush(PGconn *conn)
Definition: fe-misc.c:965
bool sigpipe_flag
Definition: libpq-int.h:453
char * gssencmode
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#define NEGOTIATE_GSS_CODE
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Definition: libpq-int.h:483
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Definition: pqcomm.h:70
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Definition: fe-connect.c:1841
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Definition: ip.h:24
#define SOCK_ERRNO
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Definition: libpq-int.h:482
#define EINTR
Definition: win32_port.h:351
char * port
Definition: libpq-int.h:337
#define NEGOTIATE_SSL_CODE
Definition: pqcomm.h:191
void resetPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:148
PGTargetServerType target_server_type
Definition: libpq-int.h:458
int nconnhost
Definition: libpq-int.h:425
#define snprintf
Definition: port.h:217
#define PG_PROTOCOL(m, n)
Definition: pqcomm.h:115
int pqGets_append(PQExpBuffer buf, PGconn *conn)
Definition: fe-misc.c:145
long val
Definition: informix.c:664
PGresult * PQgetResult(PGconn *conn)
Definition: fe-exec.c:1978
struct sockaddr * ai_addr
Definition: getaddrinfo.h:105
static int setKeepalivesCount(PGconn *conn)
Definition: fe-connect.c:1912
int whichhost
Definition: libpq-int.h:426
#define libpq_gettext(x)
Definition: libpq-int.h:841
bool send_appname
Definition: libpq-int.h:464
PGTransactionStatusType xactStatus
Definition: libpq-int.h:412
static const PQEnvironmentOption EnvironmentOptions[]
Definition: fe-connect.c:352
char last_sqlstate[6]
Definition: libpq-int.h:413
int ai_family
Definition: getaddrinfo.h:101

◆ PQconnectStart()

PGconn* PQconnectStart ( const char *  conninfo)

Definition at line 841 of file fe-connect.c.

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

Referenced by PQconnectdb(), and PQping().

842 {
843  PGconn *conn;
844 
845  /*
846  * Allocate memory for the conn structure. Note that we also expect this
847  * to initialize conn->errorMessage to empty. All subsequent steps during
848  * connection initialization will only append to that buffer.
849  */
850  conn = makeEmptyPGconn();
851  if (conn == NULL)
852  return NULL;
853 
854  /*
855  * Parse the conninfo string
856  */
857  if (!connectOptions1(conn, conninfo))
858  return conn;
859 
860  /*
861  * Compute derived options
862  */
863  if (!connectOptions2(conn))
864  return conn;
865 
866  /*
867  * Connect to the database
868  */
869  if (!connectDBStart(conn))
870  {
871  /* Just in case we failed to set it in connectDBStart */
872  conn->status = CONNECTION_BAD;
873  }
874 
875  return conn;
876 }
static bool connectOptions1(PGconn *conn, const char *conninfo)
Definition: fe-connect.c:929
PGconn * conn
Definition: streamutil.c:54
static int connectDBStart(PGconn *conn)
Definition: fe-connect.c:2040
static PGconn * makeEmptyPGconn(void)
Definition: fe-connect.c:3917
ConnStatusType status
Definition: libpq-int.h:410
static bool connectOptions2(PGconn *conn)
Definition: fe-connect.c:1027

◆ PQconnectStartParams()

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

Definition at line 760 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().

763 {
764  PGconn *conn;
765  PQconninfoOption *connOptions;
766 
767  /*
768  * Allocate memory for the conn structure. Note that we also expect this
769  * to initialize conn->errorMessage to empty. All subsequent steps during
770  * connection initialization will only append to that buffer.
771  */
772  conn = makeEmptyPGconn();
773  if (conn == NULL)
774  return NULL;
775 
776  /*
777  * Parse the conninfo arrays
778  */
779  connOptions = conninfo_array_parse(keywords, values,
780  &conn->errorMessage,
781  true, expand_dbname);
782  if (connOptions == NULL)
783  {
784  conn->status = CONNECTION_BAD;
785  /* errorMessage is already set */
786  return conn;
787  }
788 
789  /*
790  * Move option values into conn structure
791  */
792  if (!fillPGconn(conn, connOptions))
793  {
794  PQconninfoFree(connOptions);
795  return conn;
796  }
797 
798  /*
799  * Free the option info - all is in conn now
800  */
801  PQconninfoFree(connOptions);
802 
803  /*
804  * Compute derived options
805  */
806  if (!connectOptions2(conn))
807  return conn;
808 
809  /*
810  * Connect to the database
811  */
812  if (!connectDBStart(conn))
813  {
814  /* Just in case we failed to set it in connectDBStart */
815  conn->status = CONNECTION_BAD;
816  }
817 
818  return conn;
819 }
PGconn * conn
Definition: streamutil.c:54
static int connectDBStart(PGconn *conn)
Definition: fe-connect.c:2040
void PQconninfoFree(PQconninfoOption *connOptions)
Definition: fe-connect.c:6572
static PGconn * makeEmptyPGconn(void)
Definition: fe-connect.c:3917
PQExpBufferData errorMessage
Definition: libpq-int.h:571
static bool fillPGconn(PGconn *conn, PQconninfoOption *connOptions)
Definition: fe-connect.c:887
ConnStatusType status
Definition: libpq-int.h:410
static Datum values[MAXATTR]
Definition: bootstrap.c:156
static bool connectOptions2(PGconn *conn)
Definition: fe-connect.c:1027
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:5631

◆ PQconninfo()

PQconninfoOption* PQconninfo ( PGconn conn)

Definition at line 6528 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().

6529 {
6530  PQExpBufferData errorBuf;
6531  PQconninfoOption *connOptions;
6532 
6533  if (conn == NULL)
6534  return NULL;
6535 
6536  /*
6537  * We don't actually report any errors here, but callees want a buffer,
6538  * and we prefer not to trash the conn's errorMessage.
6539  */
6540  initPQExpBuffer(&errorBuf);
6541  if (PQExpBufferDataBroken(errorBuf))
6542  return NULL; /* out of memory already :-( */
6543 
6544  connOptions = conninfo_init(&errorBuf);
6545 
6546  if (connOptions != NULL)
6547  {
6549 
6550  for (option = PQconninfoOptions; option->keyword; option++)
6551  {
6552  char **connmember;
6553 
6554  if (option->connofs < 0)
6555  continue;
6556 
6557  connmember = (char **) ((char *) conn + option->connofs);
6558 
6559  if (*connmember)
6560  conninfo_storeval(connOptions, option->keyword, *connmember,
6561  &errorBuf, true, false);
6562  }
6563  }
6564 
6565  termPQExpBuffer(&errorBuf);
6566 
6567  return connOptions;
6568 }
static PQconninfoOption * conninfo_storeval(PQconninfoOption *connOptions, const char *keyword, const char *value, PQExpBuffer errorMessage, bool ignoreMissing, bool uri_decode)
Definition: fe-connect.c:6445
void termPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:131
static PQconninfoOption * conninfo_init(PQExpBuffer errorMessage)
Definition: fe-connect.c:5359
static const internalPQconninfoOption PQconninfoOptions[]
Definition: fe-connect.c:191
#define PQExpBufferDataBroken(buf)
Definition: pqexpbuffer.h:67
void initPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:92

◆ PQconninfoFree()

void PQconninfoFree ( PQconninfoOption connOptions)

Definition at line 6572 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().

6573 {
6575 
6576  if (connOptions == NULL)
6577  return;
6578 
6579  for (option = connOptions; option->keyword != NULL; option++)
6580  {
6581  if (option->val != NULL)
6582  free(option->val);
6583  }
6584  free(connOptions);
6585 }
#define free(a)
Definition: header.h:65

◆ PQconninfoParse()

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

Definition at line 5337 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().

5338 {
5339  PQExpBufferData errorBuf;
5340  PQconninfoOption *connOptions;
5341 
5342  if (errmsg)
5343  *errmsg = NULL; /* default */
5344  initPQExpBuffer(&errorBuf);
5345  if (PQExpBufferDataBroken(errorBuf))
5346  return NULL; /* out of memory already :-( */
5347  connOptions = parse_connection_string(conninfo, &errorBuf, false);
5348  if (connOptions == NULL && errmsg)
5349  *errmsg = errorBuf.data;
5350  else
5351  termPQExpBuffer(&errorBuf);
5352  return connOptions;
5353 }
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:5399
#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 1904 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_nosync(), test_pipelined_insert(), test_uniqviol(), try_complete_step(), and wait_on_slots().

1905 {
1906  if (!conn)
1907  return 0;
1908 
1909  /*
1910  * for non-blocking connections try to flush the send-queue, otherwise we
1911  * may never get a response for something that may not have already been
1912  * sent because it's in our write buffer!
1913  */
1914  if (pqIsnonblocking(conn))
1915  {
1916  if (pqFlush(conn) < 0)
1917  return 0;
1918  }
1919 
1920  /*
1921  * Load more data, if available. We do this no matter what state we are
1922  * in, since we are probably getting called because the application wants
1923  * to get rid of a read-select condition. Note that we will NOT block
1924  * waiting for more input.
1925  */
1926  if (pqReadData(conn) < 0)
1927  return 0;
1928 
1929  /* Parsing of the data waits till later. */
1930  return 1;
1931 }
int pqFlush(PGconn *conn)
Definition: fe-misc.c:965
#define pqIsnonblocking(conn)
Definition: libpq-int.h:830
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:213
const PGresult * src
Definition: libpq-events.h:60
bool resultInitialized
Definition: libpq-int.h:165
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:189
PGresAttDesc * attDescs
Definition: libpq-int.h:172
#define PG_COPYRES_TUPLES
Definition: libpq-fe.h:44
PGresAttValue ** tuples
Definition: libpq-int.h:173
#define PG_COPYRES_EVENTS
Definition: libpq-fe.h:45
PGNoticeHooks noticeHooks
Definition: libpq-int.h:187
#define PG_COPYRES_NOTICEHOOKS
Definition: libpq-fe.h:46
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:171
#define PG_COPYRES_ATTRS
Definition: libpq-fe.h:43
void PQclear(PGresult *res)
Definition: fe-exec.c:694
int ntups
Definition: libpq-int.h:170
PGEventProc proc
Definition: libpq-int.h:161
char cmdStatus[CMDSTATUS_LEN]
Definition: libpq-int.h:179
int i
void * passThrough
Definition: libpq-int.h:163
char * value
Definition: libpq-int.h:139
static PGEvent * dupEvents(PGEvent *events, int count, size_t *memSize)
Definition: fe-exec.c:392
PGEvent * events
Definition: libpq-int.h:188
PGresult * dest
Definition: libpq-events.h:61
int client_encoding
Definition: libpq-int.h:190

◆ PQdb()

◆ PQdefaultSSLKeyPassHook_OpenSSL()

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

Definition at line 1778 of file fe-secure-openssl.c.

References fprintf, libpq_gettext, and pg_conn::sslpassword.

Referenced by PQssl_passwd_cb().

1779 {
1780  if (conn->sslpassword)
1781  {
1782  if (strlen(conn->sslpassword) + 1 > size)
1783  fprintf(stderr, libpq_gettext("WARNING: sslpassword truncated\n"));
1784  strncpy(buf, conn->sslpassword, size);
1785  buf[size - 1] = '\0';
1786  return strlen(buf);
1787  }
1788  else
1789  {
1790  buf[0] = '\0';
1791  return 0;
1792  }
1793 }
#define fprintf
Definition: port.h:221
static char * buf
Definition: pg_test_fsync.c:68
char * sslpassword
Definition: libpq-int.h:383
#define libpq_gettext(x)
Definition: libpq-int.h:841

◆ PQdescribePortal()

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

Definition at line 2405 of file fe-exec.c.

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

2406 {
2407  if (!PQexecStart(conn))
2408  return NULL;
2409  if (!PQsendDescribe(conn, 'P', portal))
2410  return NULL;
2411  return PQexecFinish(conn);
2412 }
static int PQsendDescribe(PGconn *conn, char desc_type, const char *desc_target)
Definition: fe-exec.c:2450
static PGresult * PQexecFinish(PGconn *conn)
Definition: fe-exec.c:2340
static bool PQexecStart(PGconn *conn)
Definition: fe-exec.c:2275

◆ PQdescribePrepared()

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

Definition at line 2386 of file fe-exec.c.

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

Referenced by DescribeQuery(), and ECPGdescribe().

2387 {
2388  if (!PQexecStart(conn))
2389  return NULL;
2390  if (!PQsendDescribe(conn, 'S', stmt))
2391  return NULL;
2392  return PQexecFinish(conn);
2393 }
static int PQsendDescribe(PGconn *conn, char desc_type, const char *desc_target)
Definition: fe-exec.c:2450
static PGresult * PQexecFinish(PGconn *conn)
Definition: fe-exec.c:2340
static bool PQexecStart(PGconn *conn)
Definition: fe-exec.c:2275

◆ PQdisplayTuples()

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

Definition at line 591 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.

598 {
599 #define DEFAULT_FIELD_SEP " "
600 
601  int i,
602  j;
603  int nFields;
604  int nTuples;
605  int *fLength = NULL;
606 
607  if (fieldSep == NULL)
608  fieldSep = DEFAULT_FIELD_SEP;
609 
610  /* Get some useful info about the results */
611  nFields = PQnfields(res);
612  nTuples = PQntuples(res);
613 
614  if (fp == NULL)
615  fp = stdout;
616 
617  /* Figure the field lengths to align to */
618  /* will be somewhat time consuming for very large results */
619  if (fillAlign)
620  {
621  fLength = (int *) malloc(nFields * sizeof(int));
622  if (!fLength)
623  {
624  fprintf(stderr, libpq_gettext("out of memory\n"));
625  return;
626  }
627 
628  for (j = 0; j < nFields; j++)
629  {
630  fLength[j] = strlen(PQfname(res, j));
631  for (i = 0; i < nTuples; i++)
632  {
633  int flen = PQgetlength(res, i, j);
634 
635  if (flen > fLength[j])
636  fLength[j] = flen;
637  }
638  }
639  }
640 
641  if (printHeader)
642  {
643  /* first, print out the attribute names */
644  for (i = 0; i < nFields; i++)
645  {
646  fputs(PQfname(res, i), fp);
647  if (fillAlign)
648  fill(strlen(PQfname(res, i)), fLength[i], ' ', fp);
649  fputs(fieldSep, fp);
650  }
651  fprintf(fp, "\n");
652 
653  /* Underline the attribute names */
654  for (i = 0; i < nFields; i++)
655  {
656  if (fillAlign)
657  fill(0, fLength[i], '-', fp);
658  fputs(fieldSep, fp);
659  }
660  fprintf(fp, "\n");
661  }
662 
663  /* next, print out the instances */
664  for (i = 0; i < nTuples; i++)
665  {
666  for (j = 0; j < nFields; j++)
667  {
668  fprintf(fp, "%s", PQgetvalue(res, i, j));
669  if (fillAlign)
670  fill(strlen(PQgetvalue(res, i, j)), fLength[j], ' ', fp);
671  fputs(fieldSep, fp);
672  }
673  fprintf(fp, "\n");
674  }
675 
676  if (!quiet)
677  fprintf(fp, "\nQuery returned %d row%s.\n", PQntuples(res),
678  (PQntuples(res) == 1) ? "" : "s");
679 
680  fflush(fp);
681 
682  if (fLength)
683  free(fLength);
684 }
static void fill(int length, int max, char filler, FILE *fp)
Definition: fe-print.c:774
int PQgetlength(const PGresult *res, int tup_num, int field_num)
Definition: fe-exec.c:3653
int PQnfields(const PGresult *res)
Definition: fe-exec.c:3256
char * PQgetvalue(const PGresult *res, int tup_num, int field_num)
Definition: fe-exec.c:3642
char * PQfname(const PGresult *res, int field_num)
Definition: fe-exec.c:3334
int PQntuples(const PGresult *res)
Definition: fe-exec.c:3248
#define fprintf
Definition: port.h:221
#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:841

◆ PQdsplen()

int PQdsplen ( const char *  s,
int  encoding 
)

Definition at line 1212 of file fe-misc.c.

References pg_encoding_dsplen().

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

1213 {
1214  return pg_encoding_dsplen(encoding, s);
1215 }
int pg_encoding_dsplen(int encoding, const char *mbstr)
Definition: wchar.c:1935
int32 encoding
Definition: pg_database.h:41

◆ PQencryptPassword()

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

Definition at line 1175 of file fe-auth.c.

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

1176 {
1177  char *crypt_pwd;
1178 
1179  crypt_pwd = malloc(MD5_PASSWD_LEN + 1);
1180  if (!crypt_pwd)
1181  return NULL;
1182 
1183  if (!pg_md5_encrypt(passwd, user, strlen(user), crypt_pwd))
1184  {
1185  free(crypt_pwd);
1186  return NULL;
1187  }
1188 
1189  return crypt_pwd;
1190 }
#define malloc(a)
Definition: header.h:50