/usr/include/postgresql/internal/libpq-int.h is in libpq-dev 9.5.14-0ubuntu0.16.04.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 | /*-------------------------------------------------------------------------
*
* libpq-int.h
* This file contains internal definitions meant to be used only by
* the frontend libpq library, not by applications that call it.
*
* An application can include this file if it wants to bypass the
* official API defined by libpq-fe.h, but code that does so is much
* more likely to break across PostgreSQL releases than code that uses
* only the official API.
*
* Portions Copyright (c) 1996-2015, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/interfaces/libpq/libpq-int.h
*
*-------------------------------------------------------------------------
*/
#ifndef LIBPQ_INT_H
#define LIBPQ_INT_H
/* We assume libpq-fe.h has already been included. */
#include "postgres_fe.h"
#include "libpq-events.h"
#include <time.h>
#include <sys/types.h>
#ifndef WIN32
#include <sys/time.h>
#endif
#ifdef ENABLE_THREAD_SAFETY
#ifdef WIN32
#include "pthread-win32.h"
#else
#include <pthread.h>
#endif
#include <signal.h>
#endif
/* include stuff common to fe and be */
#include "getaddrinfo.h"
#include "libpq/pqcomm.h"
/* include stuff found in fe only */
#include "pqexpbuffer.h"
#ifdef ENABLE_GSS
#if defined(HAVE_GSSAPI_H)
#include <gssapi.h>
#else
#include <gssapi/gssapi.h>
#endif
#endif
#ifdef ENABLE_SSPI
#define SECURITY_WIN32
#if defined(WIN32) && !defined(WIN32_ONLY_COMPILER)
#include <ntsecapi.h>
#endif
#include <security.h>
#undef SECURITY_WIN32
#ifndef ENABLE_GSS
/*
* Define a fake structure compatible with GSSAPI on Unix.
*/
typedef struct
{
void *value;
int length;
} gss_buffer_desc;
#endif
#endif /* ENABLE_SSPI */
#ifdef USE_OPENSSL
#include <openssl/ssl.h>
#include <openssl/err.h>
#if (OPENSSL_VERSION_NUMBER >= 0x00907000L) && !defined(OPENSSL_NO_ENGINE)
#define USE_SSL_ENGINE
#endif
#endif /* USE_OPENSSL */
/*
* POSTGRES backend dependent Constants.
*/
#define CMDSTATUS_LEN 64 /* should match COMPLETION_TAG_BUFSIZE */
/*
* PGresult and the subsidiary types PGresAttDesc, PGresAttValue
* represent the result of a query (or more precisely, of a single SQL
* command --- a query string given to PQexec can contain multiple commands).
* Note we assume that a single command can return at most one tuple group,
* hence there is no need for multiple descriptor sets.
*/
/* Subsidiary-storage management structure for PGresult.
* See space management routines in fe-exec.c for details.
* Note that space[k] refers to the k'th byte starting from the physical
* head of the block --- it's a union, not a struct!
*/
typedef union pgresult_data PGresult_data;
union pgresult_data
{
PGresult_data *next; /* link to next block, or NULL */
char space[1]; /* dummy for accessing block as bytes */
};
/* Data about a single parameter of a prepared statement */
typedef struct pgresParamDesc
{
Oid typid; /* type id */
} PGresParamDesc;
/*
* Data for a single attribute of a single tuple
*
* We use char* for Attribute values.
*
* The value pointer always points to a null-terminated area; we add a
* null (zero) byte after whatever the backend sends us. This is only
* particularly useful for text values ... with a binary value, the
* value might have embedded nulls, so the application can't use C string
* operators on it. But we add a null anyway for consistency.
* Note that the value itself does not contain a length word.
*
* A NULL attribute is a special case in two ways: its len field is NULL_LEN
* and its value field points to null_field in the owning PGresult. All the
* NULL attributes in a query result point to the same place (there's no need
* to store a null string separately for each one).
*/
#define NULL_LEN (-1) /* pg_result len for NULL value */
typedef struct pgresAttValue
{
int len; /* length in bytes of the value */
char *value; /* actual value, plus terminating zero byte */
} PGresAttValue;
/* Typedef for message-field list entries */
typedef struct pgMessageField
{
struct pgMessageField *next; /* list link */
char code; /* field code */
char contents[FLEXIBLE_ARRAY_MEMBER]; /* value, nul-terminated */
} PGMessageField;
/* Fields needed for notice handling */
typedef struct
{
PQnoticeReceiver noticeRec; /* notice message receiver */
void *noticeRecArg;
PQnoticeProcessor noticeProc; /* notice message processor */
void *noticeProcArg;
} PGNoticeHooks;
typedef struct PGEvent
{
PGEventProc proc; /* the function to call on events */
char *name; /* used only for error messages */
void *passThrough; /* pointer supplied at registration time */
void *data; /* optional state (instance) data */
bool resultInitialized; /* T if RESULTCREATE/COPY succeeded */
} PGEvent;
struct pg_result
{
int ntups;
int numAttributes;
PGresAttDesc *attDescs;
PGresAttValue **tuples; /* each PGresTuple is an array of
* PGresAttValue's */
int tupArrSize; /* allocated size of tuples array */
int numParameters;
PGresParamDesc *paramDescs;
ExecStatusType resultStatus;
char cmdStatus[CMDSTATUS_LEN]; /* cmd status from the query */
int binary; /* binary tuple values if binary == 1,
* otherwise text */
/*
* These fields are copied from the originating PGconn, so that operations
* on the PGresult don't have to reference the PGconn.
*/
PGNoticeHooks noticeHooks;
PGEvent *events;
int nEvents;
int client_encoding; /* encoding id */
/*
* Error information (all NULL if not an error result). errMsg is the
* "overall" error message returned by PQresultErrorMessage. If we have
* per-field info then it is stored in a linked list.
*/
char *errMsg; /* error message, or NULL if no error */
PGMessageField *errFields; /* message broken into fields */
/* All NULL attributes in the query result point to this null string */
char null_field[1];
/*
* Space management information. Note that attDescs and error stuff, if
* not null, point into allocated blocks. But tuples points to a
* separately malloc'd block, so that we can realloc it.
*/
PGresult_data *curBlock; /* most recently allocated block */
int curOffset; /* start offset of free space in block */
int spaceLeft; /* number of free bytes remaining in block */
};
/* PGAsyncStatusType defines the state of the query-execution state machine */
typedef enum
{
PGASYNC_IDLE, /* nothing's happening, dude */
PGASYNC_BUSY, /* query in progress */
PGASYNC_READY, /* result ready for PQgetResult */
PGASYNC_COPY_IN, /* Copy In data transfer in progress */
PGASYNC_COPY_OUT, /* Copy Out data transfer in progress */
PGASYNC_COPY_BOTH /* Copy In/Out data transfer in progress */
} PGAsyncStatusType;
/* PGQueryClass tracks which query protocol we are now executing */
typedef enum
{
PGQUERY_SIMPLE, /* simple Query protocol (PQexec) */
PGQUERY_EXTENDED, /* full Extended protocol (PQexecParams) */
PGQUERY_PREPARE, /* Parse only (PQprepare) */
PGQUERY_DESCRIBE /* Describe Statement or Portal */
} PGQueryClass;
/* PGSetenvStatusType defines the state of the PQSetenv state machine */
/* (this is used only for 2.0-protocol connections) */
typedef enum
{
SETENV_STATE_CLIENT_ENCODING_SEND, /* About to send an Environment Option */
SETENV_STATE_CLIENT_ENCODING_WAIT, /* Waiting for above send to complete */
SETENV_STATE_OPTION_SEND, /* About to send an Environment Option */
SETENV_STATE_OPTION_WAIT, /* Waiting for above send to complete */
SETENV_STATE_QUERY1_SEND, /* About to send a status query */
SETENV_STATE_QUERY1_WAIT, /* Waiting for query to complete */
SETENV_STATE_QUERY2_SEND, /* About to send a status query */
SETENV_STATE_QUERY2_WAIT, /* Waiting for query to complete */
SETENV_STATE_IDLE
} PGSetenvStatusType;
/* Typedef for the EnvironmentOptions[] array */
typedef struct PQEnvironmentOption
{
const char *envName, /* name of an environment variable */
*pgName; /* name of corresponding SET variable */
} PQEnvironmentOption;
/* Typedef for parameter-status list entries */
typedef struct pgParameterStatus
{
struct pgParameterStatus *next; /* list link */
char *name; /* parameter name */
char *value; /* parameter value */
/* Note: name and value are stored in same malloc block as struct is */
} pgParameterStatus;
/* large-object-access data ... allocated only if large-object code is used. */
typedef struct pgLobjfuncs
{
Oid fn_lo_open; /* OID of backend function lo_open */
Oid fn_lo_close; /* OID of backend function lo_close */
Oid fn_lo_creat; /* OID of backend function lo_creat */
Oid fn_lo_create; /* OID of backend function lo_create */
Oid fn_lo_unlink; /* OID of backend function lo_unlink */
Oid fn_lo_lseek; /* OID of backend function lo_lseek */
Oid fn_lo_lseek64; /* OID of backend function lo_lseek64 */
Oid fn_lo_tell; /* OID of backend function lo_tell */
Oid fn_lo_tell64; /* OID of backend function lo_tell64 */
Oid fn_lo_truncate; /* OID of backend function lo_truncate */
Oid fn_lo_truncate64; /* OID of function lo_truncate64 */
Oid fn_lo_read; /* OID of backend function LOread */
Oid fn_lo_write; /* OID of backend function LOwrite */
} PGlobjfuncs;
/* PGdataValue represents a data field value being passed to a row processor.
* It could be either text or binary data; text data is not zero-terminated.
* A SQL NULL is represented by len < 0; then value is still valid but there
* are no data bytes there.
*/
typedef struct pgDataValue
{
int len; /* data length in bytes, or <0 if NULL */
const char *value; /* data value, without zero-termination */
} PGdataValue;
/*
* PGconn stores all the state data associated with a single connection
* to a backend.
*/
struct pg_conn
{
/* Saved values of connection options */
char *pghost; /* the machine on which the server is running */
char *pghostaddr; /* the numeric IP address of the machine on
* which the server is running. Takes
* precedence over above. */
char *pgport; /* the server's communication port */
char *pgunixsocket; /* the Unix-domain socket that the server is
* listening on; if NULL, uses a default
* constructed from pgport */
char *pgtty; /* tty on which the backend messages is
* displayed (OBSOLETE, NOT USED) */
char *connect_timeout; /* connection timeout (numeric string) */
char *client_encoding_initial; /* encoding to use */
char *pgoptions; /* options to start the backend with */
char *appname; /* application name */
char *fbappname; /* fallback application name */
char *dbName; /* database name */
char *replication; /* connect as the replication standby? */
char *pguser; /* Postgres username and password, if any */
char *pgpass;
char *keepalives; /* use TCP keepalives? */
char *keepalives_idle; /* time between TCP keepalives */
char *keepalives_interval; /* time between TCP keepalive
* retransmits */
char *keepalives_count; /* maximum number of TCP keepalive
* retransmits */
char *sslmode; /* SSL mode (require,prefer,allow,disable) */
char *sslcompression; /* SSL compression (0 or 1) */
char *sslkey; /* client key filename */
char *sslcert; /* client certificate filename */
char *sslrootcert; /* root certificate filename */
char *sslcrl; /* certificate revocation list filename */
char *requirepeer; /* required peer credentials for local sockets */
#if defined(ENABLE_GSS) || defined(ENABLE_SSPI)
char *krbsrvname; /* Kerberos service name */
#endif
/* Optional file to write trace info to */
FILE *Pfdebug;
/* Callback procedures for notice message processing */
PGNoticeHooks noticeHooks;
/* Event procs registered via PQregisterEventProc */
PGEvent *events; /* expandable array of event data */
int nEvents; /* number of active events */
int eventArraySize; /* allocated array size */
/* Status indicators */
ConnStatusType status;
PGAsyncStatusType asyncStatus;
PGTransactionStatusType xactStatus; /* never changes to ACTIVE */
PGQueryClass queryclass;
char *last_query; /* last SQL command, or NULL if unknown */
char last_sqlstate[6]; /* last reported SQLSTATE */
bool options_valid; /* true if OK to attempt connection */
bool nonblocking; /* whether this connection is using nonblock
* sending semantics */
bool singleRowMode; /* return current query result row-by-row? */
char copy_is_binary; /* 1 = copy binary, 0 = copy text */
int copy_already_done; /* # bytes already returned in COPY
* OUT */
PGnotify *notifyHead; /* oldest unreported Notify msg */
PGnotify *notifyTail; /* newest unreported Notify msg */
/* Connection data */
/* See PQconnectPoll() for how we use 'int' and not 'pgsocket'. */
pgsocket sock; /* FD for socket, PGINVALID_SOCKET if
* unconnected */
SockAddr laddr; /* Local address */
SockAddr raddr; /* Remote address */
ProtocolVersion pversion; /* FE/BE protocol version in use */
int sversion; /* server version, e.g. 70401 for 7.4.1 */
bool auth_req_received; /* true if any type of auth req
* received */
bool password_needed; /* true if server demanded a password */
bool dot_pgpass_used; /* true if used .pgpass */
bool sigpipe_so; /* have we masked SIGPIPE via SO_NOSIGPIPE? */
bool sigpipe_flag; /* can we mask SIGPIPE via MSG_NOSIGNAL? */
/* Transient state needed while establishing connection */
bool try_next_addr; /* time to advance to next address? */
bool is_new_addr; /* need to (re)initialize for new address? */
struct addrinfo *addrlist; /* list of possible backend addresses */
struct addrinfo *addr_cur; /* the one currently being tried */
int addrlist_family; /* needed to know how to free addrlist */
PGSetenvStatusType setenv_state; /* for 2.0 protocol only */
const PQEnvironmentOption *next_eo;
bool send_appname; /* okay to send application_name? */
/* Miscellaneous stuff */
int be_pid; /* PID of backend --- needed for cancels */
int be_key; /* key of backend --- needed for cancels */
char md5Salt[4]; /* password salt received from backend */
pgParameterStatus *pstatus; /* ParameterStatus data */
int client_encoding; /* encoding id */
bool std_strings; /* standard_conforming_strings */
PGVerbosity verbosity; /* error/notice message verbosity */
PGlobjfuncs *lobjfuncs; /* private state for large-object access fns */
/* Buffer for data received from backend and not yet processed */
char *inBuffer; /* currently allocated buffer */
int inBufSize; /* allocated size of buffer */
int inStart; /* offset to first unconsumed data in buffer */
int inCursor; /* next byte to tentatively consume */
int inEnd; /* offset to first position after avail data */
/* Buffer for data not yet sent to backend */
char *outBuffer; /* currently allocated buffer */
int outBufSize; /* allocated size of buffer */
int outCount; /* number of chars waiting in buffer */
/* State for constructing messages in outBuffer */
int outMsgStart; /* offset to msg start (length word); if -1,
* msg has no length word */
int outMsgEnd; /* offset to msg end (so far) */
/* Row processor interface workspace */
PGdataValue *rowBuf; /* array for passing values to rowProcessor */
int rowBufLen; /* number of entries allocated in rowBuf */
/* Status for asynchronous result construction */
PGresult *result; /* result being constructed */
PGresult *next_result; /* next result (used in single-row mode) */
/* Assorted state for SSL, GSS, etc */
#ifdef USE_SSL
bool allow_ssl_try; /* Allowed to try SSL negotiation */
bool wait_ssl_try; /* Delay SSL negotiation until after
* attempting normal connection */
bool ssl_in_use;
#ifdef USE_OPENSSL
SSL *ssl; /* SSL status, if have SSL connection */
X509 *peer; /* X509 cert of server */
#ifdef USE_SSL_ENGINE
ENGINE *engine; /* SSL engine, if any */
#else
void *engine; /* dummy field to keep struct the same if
* OpenSSL version changes */
#endif
#endif /* USE_OPENSSL */
#endif /* USE_SSL */
#ifdef ENABLE_GSS
gss_ctx_id_t gctx; /* GSS context */
gss_name_t gtarg_nam; /* GSS target name */
gss_buffer_desc ginbuf; /* GSS input token */
gss_buffer_desc goutbuf; /* GSS output token */
#endif
#ifdef ENABLE_SSPI
#ifndef ENABLE_GSS
gss_buffer_desc ginbuf; /* GSS input token */
#else
char *gsslib; /* What GSS librart to use ("gssapi" or
* "sspi") */
#endif
CredHandle *sspicred; /* SSPI credentials handle */
CtxtHandle *sspictx; /* SSPI context */
char *sspitarget; /* SSPI target name */
int usesspi; /* Indicate if SSPI is in use on the
* connection */
#endif
/* Buffer for current error message */
PQExpBufferData errorMessage; /* expansible string */
/* Buffer for receiving various parts of messages */
PQExpBufferData workBuffer; /* expansible string */
};
/* PGcancel stores all data necessary to cancel a connection. A copy of this
* data is required to safely cancel a connection running on a different
* thread.
*/
struct pg_cancel
{
SockAddr raddr; /* Remote address */
int be_pid; /* PID of backend --- needed for cancels */
int be_key; /* key of backend --- needed for cancels */
};
/* String descriptions of the ExecStatusTypes.
* direct use of this array is deprecated; call PQresStatus() instead.
*/
extern char *const pgresStatus[];
#ifdef USE_SSL
#ifndef WIN32
#define USER_CERT_FILE ".postgresql/postgresql.crt"
#define USER_KEY_FILE ".postgresql/postgresql.key"
#define ROOT_CERT_FILE ".postgresql/root.crt"
#define ROOT_CRL_FILE ".postgresql/root.crl"
#else
/* On Windows, the "home" directory is already PostgreSQL-specific */
#define USER_CERT_FILE "postgresql.crt"
#define USER_KEY_FILE "postgresql.key"
#define ROOT_CERT_FILE "root.crt"
#define ROOT_CRL_FILE "root.crl"
#endif
#endif /* USE_SSL */
/* ----------------
* Internal functions of libpq
* Functions declared here need to be visible across files of libpq,
* but are not intended to be called by applications. We use the
* convention "pqXXX" for internal functions, vs. the "PQxxx" names
* used for application-visible routines.
* ----------------
*/
/* === in fe-connect.c === */
extern void pqDropConnection(PGconn *conn, bool flushInput);
extern int pqPacketSend(PGconn *conn, char pack_type,
const void *buf, size_t buf_len);
extern bool pqGetHomeDirectory(char *buf, int bufsize);
#ifdef ENABLE_THREAD_SAFETY
extern pgthreadlock_t pg_g_threadlock;
#define PGTHREAD_ERROR(msg) \
do { \
fprintf(stderr, "%s\n", msg); \
abort(); \
} while (0)
#define pglock_thread() pg_g_threadlock(true)
#define pgunlock_thread() pg_g_threadlock(false)
#else
#define pglock_thread() ((void) 0)
#define pgunlock_thread() ((void) 0)
#endif
/* === in fe-exec.c === */
extern void pqSetResultError(PGresult *res, const char *msg);
extern void pqCatenateResultError(PGresult *res, const char *msg);
extern void *pqResultAlloc(PGresult *res, size_t nBytes, bool isBinary);
extern char *pqResultStrdup(PGresult *res, const char *str);
extern void pqClearAsyncResult(PGconn *conn);
extern void pqSaveErrorResult(PGconn *conn);
extern PGresult *pqPrepareAsyncResult(PGconn *conn);
extern void pqInternalNotice(const PGNoticeHooks *hooks, const char *fmt,...) pg_attribute_printf(2, 3);
extern void pqSaveMessageField(PGresult *res, char code,
const char *value);
extern void pqSaveParameterStatus(PGconn *conn, const char *name,
const char *value);
extern int pqRowProcessor(PGconn *conn, const char **errmsgp);
extern void pqHandleSendFailure(PGconn *conn);
/* === in fe-protocol2.c === */
extern PostgresPollingStatusType pqSetenvPoll(PGconn *conn);
extern char *pqBuildStartupPacket2(PGconn *conn, int *packetlen,
const PQEnvironmentOption *options);
extern void pqParseInput2(PGconn *conn);
extern int pqGetCopyData2(PGconn *conn, char **buffer, int async);
extern int pqGetline2(PGconn *conn, char *s, int maxlen);
extern int pqGetlineAsync2(PGconn *conn, char *buffer, int bufsize);
extern int pqEndcopy2(PGconn *conn);
extern PGresult *pqFunctionCall2(PGconn *conn, Oid fnid,
int *result_buf, int *actual_result_len,
int result_is_int,
const PQArgBlock *args, int nargs);
/* === in fe-protocol3.c === */
extern char *pqBuildStartupPacket3(PGconn *conn, int *packetlen,
const PQEnvironmentOption *options);
extern void pqParseInput3(PGconn *conn);
extern int pqGetErrorNotice3(PGconn *conn, bool isError);
extern int pqGetCopyData3(PGconn *conn, char **buffer, int async);
extern int pqGetline3(PGconn *conn, char *s, int maxlen);
extern int pqGetlineAsync3(PGconn *conn, char *buffer, int bufsize);
extern int pqEndcopy3(PGconn *conn);
extern PGresult *pqFunctionCall3(PGconn *conn, Oid fnid,
int *result_buf, int *actual_result_len,
int result_is_int,
const PQArgBlock *args, int nargs);
/* === in fe-misc.c === */
/*
* "Get" and "Put" routines return 0 if successful, EOF if not. Note that for
* Get, EOF merely means the buffer is exhausted, not that there is
* necessarily any error.
*/
extern int pqCheckOutBufferSpace(size_t bytes_needed, PGconn *conn);
extern int pqCheckInBufferSpace(size_t bytes_needed, PGconn *conn);
extern int pqGetc(char *result, PGconn *conn);
extern int pqPutc(char c, PGconn *conn);
extern int pqGets(PQExpBuffer buf, PGconn *conn);
extern int pqGets_append(PQExpBuffer buf, PGconn *conn);
extern int pqPuts(const char *s, PGconn *conn);
extern int pqGetnchar(char *s, size_t len, PGconn *conn);
extern int pqSkipnchar(size_t len, PGconn *conn);
extern int pqPutnchar(const char *s, size_t len, PGconn *conn);
extern int pqGetInt(int *result, size_t bytes, PGconn *conn);
extern int pqPutInt(int value, size_t bytes, PGconn *conn);
extern int pqPutMsgStart(char msg_type, bool force_len, PGconn *conn);
extern int pqPutMsgEnd(PGconn *conn);
extern int pqReadData(PGconn *conn);
extern int pqFlush(PGconn *conn);
extern int pqWait(int forRead, int forWrite, PGconn *conn);
extern int pqWaitTimed(int forRead, int forWrite, PGconn *conn,
time_t finish_time);
extern int pqReadReady(PGconn *conn);
extern int pqWriteReady(PGconn *conn);
/* === in fe-secure.c === */
extern int pqsecure_initialize(PGconn *);
extern void pqsecure_destroy(void);
extern PostgresPollingStatusType pqsecure_open_client(PGconn *);
extern void pqsecure_close(PGconn *);
extern ssize_t pqsecure_read(PGconn *, void *ptr, size_t len);
extern ssize_t pqsecure_write(PGconn *, const void *ptr, size_t len);
extern ssize_t pqsecure_raw_read(PGconn *, void *ptr, size_t len);
extern ssize_t pqsecure_raw_write(PGconn *, const void *ptr, size_t len);
#if defined(ENABLE_THREAD_SAFETY) && !defined(WIN32)
extern int pq_block_sigpipe(sigset_t *osigset, bool *sigpipe_pending);
extern void pq_reset_sigpipe(sigset_t *osigset, bool sigpipe_pending,
bool got_epipe);
#endif
/*
* The SSL implementation provides these functions (fe-secure-openssl.c)
*/
extern void pgtls_init_library(bool do_ssl, int do_crypto);
extern int pgtls_init(PGconn *conn);
extern PostgresPollingStatusType pgtls_open_client(PGconn *conn);
extern void pgtls_close(PGconn *conn);
extern ssize_t pgtls_read(PGconn *conn, void *ptr, size_t len);
extern bool pgtls_read_pending(PGconn *conn);
extern ssize_t pgtls_write(PGconn *conn, const void *ptr, size_t len);
/*
* this is so that we can check if a connection is non-blocking internally
* without the overhead of a function call
*/
#define pqIsnonblocking(conn) ((conn)->nonblocking)
#ifdef ENABLE_NLS
extern char *libpq_gettext(const char *msgid) pg_attribute_format_arg(1);
extern char *libpq_ngettext(const char *msgid, const char *msgid_plural, unsigned long n) pg_attribute_format_arg(1) pg_attribute_format_arg(2);
#else
#define libpq_gettext(x) (x)
#define libpq_ngettext(s, p, n) ((n) == 1 ? (s) : (p))
#endif
/*
* These macros are needed to let error-handling code be portable between
* Unix and Windows. (ugh)
*/
#ifdef WIN32
#define SOCK_ERRNO (WSAGetLastError())
#define SOCK_STRERROR winsock_strerror
#define SOCK_ERRNO_SET(e) WSASetLastError(e)
#else
#define SOCK_ERRNO errno
#define SOCK_STRERROR pqStrerror
#define SOCK_ERRNO_SET(e) (errno = (e))
#endif
#endif /* LIBPQ_INT_H */
|