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libpq.h File Reference
#include <netinet/in.h>
#include "lib/stringinfo.h"
#include "libpq/libpq-be.h"
#include "storage/latch.h"
Include dependency graph for libpq.h:
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Data Structures

struct  PQcommMethods
 

Macros

#define pq_comm_reset()   (PqCommMethods->comm_reset())
 
#define pq_flush()   (PqCommMethods->flush())
 
#define pq_flush_if_writable()   (PqCommMethods->flush_if_writable())
 
#define pq_is_send_pending()   (PqCommMethods->is_send_pending())
 
#define pq_putmessage(msgtype, s, len)   (PqCommMethods->putmessage(msgtype, s, len))
 
#define pq_putmessage_noblock(msgtype, s, len)   (PqCommMethods->putmessage_noblock(msgtype, s, len))
 
#define pq_startcopyout()   (PqCommMethods->startcopyout())
 
#define pq_endcopyout(errorAbort)   (PqCommMethods->endcopyout(errorAbort))
 

Functions

int StreamServerPort (int family, char *hostName, unsigned short portNumber, char *unixSocketDir, pgsocket ListenSocket[], int MaxListen)
 
int StreamConnection (pgsocket server_fd, Port *port)
 
void StreamClose (pgsocket sock)
 
void TouchSocketFiles (void)
 
void RemoveSocketFiles (void)
 
void pq_init (void)
 
int pq_getbytes (char *s, size_t len)
 
int pq_getstring (StringInfo s)
 
void pq_startmsgread (void)
 
void pq_endmsgread (void)
 
bool pq_is_reading_msg (void)
 
int pq_getmessage (StringInfo s, int maxlen)
 
int pq_getbyte (void)
 
int pq_peekbyte (void)
 
int pq_getbyte_if_available (unsigned char *c)
 
int pq_putbytes (const char *s, size_t len)
 
int secure_initialize (bool isServerStart)
 
bool secure_loaded_verify_locations (void)
 
void secure_destroy (void)
 
int secure_open_server (Port *port)
 
void secure_close (Port *port)
 
ssize_t secure_read (Port *port, void *ptr, size_t len)
 
ssize_t secure_write (Port *port, void *ptr, size_t len)
 
ssize_t secure_raw_read (Port *port, void *ptr, size_t len)
 
ssize_t secure_raw_write (Port *port, const void *ptr, size_t len)
 

Variables

PGDLLIMPORT PQcommMethodsPqCommMethods
 
char * ssl_cert_file
 
char * ssl_key_file
 
char * ssl_ca_file
 
char * ssl_crl_file
 
bool ssl_loaded_verify_locations
 
WaitEventSetFeBeWaitSet
 
char * SSLCipherSuites
 
char * SSLECDHCurve
 
bool SSLPreferServerCiphers
 

Macro Definition Documentation

#define pq_comm_reset ( )    (PqCommMethods->comm_reset())

Definition at line 38 of file libpq.h.

Referenced by PostgresMain().

#define pq_endcopyout (   errorAbort)    (PqCommMethods->endcopyout(errorAbort))

Definition at line 47 of file libpq.h.

Referenced by DoCopyTo(), errfinish(), SendCopyEnd(), and socket_comm_reset().

#define pq_flush_if_writable ( )    (PqCommMethods->flush_if_writable())

Definition at line 40 of file libpq.h.

Referenced by WalSndKeepaliveIfNecessary(), WalSndLoop(), WalSndWaitForWal(), and WalSndWriteData().

#define pq_is_send_pending ( )    (PqCommMethods->is_send_pending())

Definition at line 41 of file libpq.h.

Referenced by WalSndDone(), WalSndLoop(), WalSndWaitForWal(), and WalSndWriteData().

#define pq_putmessage (   msgtype,
  s,
  len 
)    (PqCommMethods->putmessage(msgtype, s, len))
#define pq_putmessage_noblock (   msgtype,
  s,
  len 
)    (PqCommMethods->putmessage_noblock(msgtype, s, len))

Definition at line 44 of file libpq.h.

Referenced by ProcessRepliesIfAny(), WalSndKeepalive(), WalSndWriteData(), and XLogSendPhysical().

#define pq_startcopyout ( )    (PqCommMethods->startcopyout())

Definition at line 46 of file libpq.h.

Referenced by SendCopyBegin().

Function Documentation

void pq_endmsgread ( void  )

Definition at line 1181 of file pqcomm.c.

References Assert, and PqCommReadingMsg.

Referenced by CopyFrom(), ProcessRepliesIfAny(), ProcessStartupPacket(), and SocketBackend().

1182 {
1184 
1185  PqCommReadingMsg = false;
1186 }
#define Assert(condition)
Definition: c.h:671
static bool PqCommReadingMsg
Definition: pqcomm.c:131
int pq_getbyte ( void  )

Definition at line 947 of file pqcomm.c.

References Assert, pq_recvbuf(), PqCommReadingMsg, PqRecvBuffer, PqRecvLength, and PqRecvPointer.

Referenced by CopyGetData(), recv_password_packet(), and SocketBackend().

948 {
950 
951  while (PqRecvPointer >= PqRecvLength)
952  {
953  if (pq_recvbuf()) /* If nothing in buffer, then recv some */
954  return EOF; /* Failed to recv data */
955  }
956  return (unsigned char) PqRecvBuffer[PqRecvPointer++];
957 }
static char PqRecvBuffer[PQ_RECV_BUFFER_SIZE]
Definition: pqcomm.c:123
static int PqRecvLength
Definition: pqcomm.c:125
static int pq_recvbuf(void)
Definition: pqcomm.c:886
#define Assert(condition)
Definition: c.h:671
static int PqRecvPointer
Definition: pqcomm.c:124
static bool PqCommReadingMsg
Definition: pqcomm.c:131
int pq_getbyte_if_available ( unsigned char *  c)

Definition at line 987 of file pqcomm.c.

References Assert, COMMERROR, EAGAIN, EINTR, ereport, errcode_for_socket_access(), errmsg(), EWOULDBLOCK, MyProcPort, PqCommReadingMsg, PqRecvBuffer, PqRecvLength, PqRecvPointer, secure_read(), and socket_set_nonblocking().

Referenced by ProcessRepliesIfAny().

988 {
989  int r;
990 
992 
994  {
996  return 1;
997  }
998 
999  /* Put the socket into non-blocking mode */
1000  socket_set_nonblocking(true);
1001 
1002  r = secure_read(MyProcPort, c, 1);
1003  if (r < 0)
1004  {
1005  /*
1006  * Ok if no data available without blocking or interrupted (though
1007  * EINTR really shouldn't happen with a non-blocking socket). Report
1008  * other errors.
1009  */
1010  if (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR)
1011  r = 0;
1012  else
1013  {
1014  /*
1015  * Careful: an ereport() that tries to write to the client would
1016  * cause recursion to here, leading to stack overflow and core
1017  * dump! This message must go *only* to the postmaster log.
1018  */
1021  errmsg("could not receive data from client: %m")));
1022  r = EOF;
1023  }
1024  }
1025  else if (r == 0)
1026  {
1027  /* EOF detected */
1028  r = EOF;
1029  }
1030 
1031  return r;
1032 }
#define EWOULDBLOCK
Definition: win32.h:301
static char PqRecvBuffer[PQ_RECV_BUFFER_SIZE]
Definition: pqcomm.c:123
struct Port * MyProcPort
Definition: globals.c:40
ssize_t secure_read(Port *port, void *ptr, size_t len)
Definition: be-secure.c:137
#define EAGAIN
Definition: win32.h:293
static void socket_set_nonblocking(bool nonblocking)
Definition: pqcomm.c:869
static int PqRecvLength
Definition: pqcomm.c:125
char * c
#define COMMERROR
Definition: elog.h:30
#define ereport(elevel, rest)
Definition: elog.h:122
int errcode_for_socket_access(void)
Definition: elog.c:669
#define EINTR
Definition: win32.h:295
#define Assert(condition)
Definition: c.h:671
int errmsg(const char *fmt,...)
Definition: elog.c:797
static int PqRecvPointer
Definition: pqcomm.c:124
static bool PqCommReadingMsg
Definition: pqcomm.c:131
int pq_getbytes ( char *  s,
size_t  len 
)

Definition at line 1041 of file pqcomm.c.

References Assert, pq_recvbuf(), PqCommReadingMsg, PqRecvBuffer, PqRecvLength, and PqRecvPointer.

Referenced by CopyGetData(), GetOldFunctionMessage(), pq_getmessage(), and ProcessStartupPacket().

1042 {
1043  size_t amount;
1044 
1046 
1047  while (len > 0)
1048  {
1049  while (PqRecvPointer >= PqRecvLength)
1050  {
1051  if (pq_recvbuf()) /* If nothing in buffer, then recv some */
1052  return EOF; /* Failed to recv data */
1053  }
1054  amount = PqRecvLength - PqRecvPointer;
1055  if (amount > len)
1056  amount = len;
1057  memcpy(s, PqRecvBuffer + PqRecvPointer, amount);
1058  PqRecvPointer += amount;
1059  s += amount;
1060  len -= amount;
1061  }
1062  return 0;
1063 }
static char PqRecvBuffer[PQ_RECV_BUFFER_SIZE]
Definition: pqcomm.c:123
static int PqRecvLength
Definition: pqcomm.c:125
static int pq_recvbuf(void)
Definition: pqcomm.c:886
#define Assert(condition)
Definition: c.h:671
static int PqRecvPointer
Definition: pqcomm.c:124
static bool PqCommReadingMsg
Definition: pqcomm.c:131
int pq_getmessage ( StringInfo  s,
int  maxlen 
)

Definition at line 1219 of file pqcomm.c.

References Assert, COMMERROR, StringInfoData::data, enlargeStringInfo(), ereport, errcode(), errmsg(), StringInfoData::len, PG_CATCH, PG_END_TRY, PG_RE_THROW, PG_TRY, pq_discardbytes(), pq_getbytes(), PqCommReadingMsg, and resetStringInfo().

Referenced by CopyGetData(), ProcessRepliesIfAny(), recv_password_packet(), and SocketBackend().

1220 {
1221  int32 len;
1222 
1224 
1225  resetStringInfo(s);
1226 
1227  /* Read message length word */
1228  if (pq_getbytes((char *) &len, 4) == EOF)
1229  {
1231  (errcode(ERRCODE_PROTOCOL_VIOLATION),
1232  errmsg("unexpected EOF within message length word")));
1233  return EOF;
1234  }
1235 
1236  len = ntohl(len);
1237 
1238  if (len < 4 ||
1239  (maxlen > 0 && len > maxlen))
1240  {
1242  (errcode(ERRCODE_PROTOCOL_VIOLATION),
1243  errmsg("invalid message length")));
1244  return EOF;
1245  }
1246 
1247  len -= 4; /* discount length itself */
1248 
1249  if (len > 0)
1250  {
1251  /*
1252  * Allocate space for message. If we run out of room (ridiculously
1253  * large message), we will elog(ERROR), but we want to discard the
1254  * message body so as not to lose communication sync.
1255  */
1256  PG_TRY();
1257  {
1258  enlargeStringInfo(s, len);
1259  }
1260  PG_CATCH();
1261  {
1262  if (pq_discardbytes(len) == EOF)
1264  (errcode(ERRCODE_PROTOCOL_VIOLATION),
1265  errmsg("incomplete message from client")));
1266 
1267  /* we discarded the rest of the message so we're back in sync. */
1268  PqCommReadingMsg = false;
1269  PG_RE_THROW();
1270  }
1271  PG_END_TRY();
1272 
1273  /* And grab the message */
1274  if (pq_getbytes(s->data, len) == EOF)
1275  {
1277  (errcode(ERRCODE_PROTOCOL_VIOLATION),
1278  errmsg("incomplete message from client")));
1279  return EOF;
1280  }
1281  s->len = len;
1282  /* Place a trailing null per StringInfo convention */
1283  s->data[len] = '\0';
1284  }
1285 
1286  /* finished reading the message. */
1287  PqCommReadingMsg = false;
1288 
1289  return 0;
1290 }
static int pq_discardbytes(size_t len)
Definition: pqcomm.c:1075
int errcode(int sqlerrcode)
Definition: elog.c:575
signed int int32
Definition: c.h:253
int pq_getbytes(char *s, size_t len)
Definition: pqcomm.c:1041
#define COMMERROR
Definition: elog.h:30
void enlargeStringInfo(StringInfo str, int needed)
Definition: stringinfo.c:277
void resetStringInfo(StringInfo str)
Definition: stringinfo.c:94
#define ereport(elevel, rest)
Definition: elog.h:122
#define PG_CATCH()
Definition: elog.h:293
#define Assert(condition)
Definition: c.h:671
#define PG_RE_THROW()
Definition: elog.h:314
int errmsg(const char *fmt,...)
Definition: elog.c:797
static bool PqCommReadingMsg
Definition: pqcomm.c:131
#define PG_TRY()
Definition: elog.h:284
#define PG_END_TRY()
Definition: elog.h:300
int pq_getstring ( StringInfo  s)

Definition at line 1113 of file pqcomm.c.

References appendBinaryStringInfo(), Assert, i, pq_recvbuf(), PqCommReadingMsg, PqRecvBuffer, PqRecvLength, PqRecvPointer, and resetStringInfo().

Referenced by GetOldFunctionMessage(), and SocketBackend().

1114 {
1115  int i;
1116 
1118 
1119  resetStringInfo(s);
1120 
1121  /* Read until we get the terminating '\0' */
1122  for (;;)
1123  {
1124  while (PqRecvPointer >= PqRecvLength)
1125  {
1126  if (pq_recvbuf()) /* If nothing in buffer, then recv some */
1127  return EOF; /* Failed to recv data */
1128  }
1129 
1130  for (i = PqRecvPointer; i < PqRecvLength; i++)
1131  {
1132  if (PqRecvBuffer[i] == '\0')
1133  {
1134  /* include the '\0' in the copy */
1136  i - PqRecvPointer + 1);
1137  PqRecvPointer = i + 1; /* advance past \0 */
1138  return 0;
1139  }
1140  }
1141 
1142  /* If we're here we haven't got the \0 in the buffer yet. */
1144  PqRecvLength - PqRecvPointer);
1146  }
1147 }
static char PqRecvBuffer[PQ_RECV_BUFFER_SIZE]
Definition: pqcomm.c:123
static int PqRecvLength
Definition: pqcomm.c:125
static int pq_recvbuf(void)
Definition: pqcomm.c:886
void resetStringInfo(StringInfo str)
Definition: stringinfo.c:94
#define Assert(condition)
Definition: c.h:671
int i
static int PqRecvPointer
Definition: pqcomm.c:124
static bool PqCommReadingMsg
Definition: pqcomm.c:131
void appendBinaryStringInfo(StringInfo str, const char *data, int datalen)
Definition: stringinfo.c:240
void pq_init ( void  )

Definition at line 175 of file pqcomm.c.

References AddWaitEventToSet(), COMMERROR, CreateWaitEventSet(), DoingCopyOut, ereport, errmsg(), MemoryContextAlloc(), MyLatch, MyProcPort, NULL, on_proc_exit(), pg_set_noblock(), PQ_SEND_BUFFER_SIZE, PqCommBusy, PqCommReadingMsg, PqRecvLength, PqRecvPointer, PqSendBuffer, PqSendBufferSize, PqSendPointer, PqSendStart, Port::sock, socket_close(), TopMemoryContext, WL_LATCH_SET, WL_POSTMASTER_DEATH, and WL_SOCKET_WRITEABLE.

Referenced by BackendInitialize().

176 {
177  /* initialize state variables */
181  PqCommBusy = false;
182  PqCommReadingMsg = false;
183  DoingCopyOut = false;
184 
185  /* set up process-exit hook to close the socket */
187 
188  /*
189  * In backends (as soon as forked) we operate the underlying socket in
190  * nonblocking mode and use latches to implement blocking semantics if
191  * needed. That allows us to provide safely interruptible reads and
192  * writes.
193  *
194  * Use COMMERROR on failure, because ERROR would try to send the error to
195  * the client, which might require changing the mode again, leading to
196  * infinite recursion.
197  */
198 #ifndef WIN32
201  (errmsg("could not set socket to nonblocking mode: %m")));
202 #endif
203 
206  NULL, NULL);
209 }
#define WL_SOCKET_WRITEABLE
Definition: latch.h:126
static bool DoingCopyOut
Definition: pqcomm.c:132
struct Port * MyProcPort
Definition: globals.c:40
int AddWaitEventToSet(WaitEventSet *set, uint32 events, pgsocket fd, Latch *latch, void *user_data)
Definition: latch.c:612
void on_proc_exit(pg_on_exit_callback function, Datum arg)
Definition: ipc.c:292
static char * PqSendBuffer
Definition: pqcomm.c:118
static int PqSendStart
Definition: pqcomm.c:121
WaitEventSet * FeBeWaitSet
Definition: pqcomm.c:167
pgsocket sock
Definition: libpq-be.h:118
WaitEventSet * CreateWaitEventSet(MemoryContext context, int nevents)
Definition: latch.c:484
static int PqRecvLength
Definition: pqcomm.c:125
static int PqSendPointer
Definition: pqcomm.c:120
#define COMMERROR
Definition: elog.h:30
#define ereport(elevel, rest)
Definition: elog.h:122
MemoryContext TopMemoryContext
Definition: mcxt.c:43
static int PqSendBufferSize
Definition: pqcomm.c:119
static bool PqCommBusy
Definition: pqcomm.c:130
#define WL_POSTMASTER_DEATH
Definition: latch.h:128
#define NULL
Definition: c.h:226
bool pg_set_noblock(pgsocket sock)
Definition: noblock.c:21
static void socket_close(int code, Datum arg)
Definition: pqcomm.c:237
int errmsg(const char *fmt,...)
Definition: elog.c:797
void * MemoryContextAlloc(MemoryContext context, Size size)
Definition: mcxt.c:749
struct Latch * MyLatch
Definition: globals.c:51
static int PqRecvPointer
Definition: pqcomm.c:124
static bool PqCommReadingMsg
Definition: pqcomm.c:131
#define WL_LATCH_SET
Definition: latch.h:124
#define PQ_SEND_BUFFER_SIZE
Definition: pqcomm.c:115
bool pq_is_reading_msg ( void  )

Definition at line 1197 of file pqcomm.c.

References PqCommReadingMsg.

Referenced by PostgresMain().

1198 {
1199  return PqCommReadingMsg;
1200 }
static bool PqCommReadingMsg
Definition: pqcomm.c:131
int pq_peekbyte ( void  )

Definition at line 966 of file pqcomm.c.

References Assert, pq_recvbuf(), PqCommReadingMsg, PqRecvBuffer, PqRecvLength, and PqRecvPointer.

Referenced by recv_password_packet().

967 {
969 
970  while (PqRecvPointer >= PqRecvLength)
971  {
972  if (pq_recvbuf()) /* If nothing in buffer, then recv some */
973  return EOF; /* Failed to recv data */
974  }
975  return (unsigned char) PqRecvBuffer[PqRecvPointer];
976 }
static char PqRecvBuffer[PQ_RECV_BUFFER_SIZE]
Definition: pqcomm.c:123
static int PqRecvLength
Definition: pqcomm.c:125
static int pq_recvbuf(void)
Definition: pqcomm.c:886
#define Assert(condition)
Definition: c.h:671
static int PqRecvPointer
Definition: pqcomm.c:124
static bool PqCommReadingMsg
Definition: pqcomm.c:131
int pq_putbytes ( const char *  s,
size_t  len 
)

Definition at line 1300 of file pqcomm.c.

References Assert, DoingCopyOut, internal_putbytes(), and PqCommBusy.

Referenced by CopySendEndOfRow(), and socket_endcopyout().

1301 {
1302  int res;
1303 
1304  /* Should only be called by old-style COPY OUT */
1306  /* No-op if reentrant call */
1307  if (PqCommBusy)
1308  return 0;
1309  PqCommBusy = true;
1310  res = internal_putbytes(s, len);
1311  PqCommBusy = false;
1312  return res;
1313 }
static bool DoingCopyOut
Definition: pqcomm.c:132
static int internal_putbytes(const char *s, size_t len)
Definition: pqcomm.c:1316
static bool PqCommBusy
Definition: pqcomm.c:130
#define Assert(condition)
Definition: c.h:671
void pq_startmsgread ( void  )

Definition at line 1157 of file pqcomm.c.

References ereport, errcode(), errmsg(), FATAL, and PqCommReadingMsg.

Referenced by CopyGetData(), ProcessRepliesIfAny(), ProcessStartupPacket(), ReceiveCopyBegin(), recv_password_packet(), and SocketBackend().

1158 {
1159  /*
1160  * There shouldn't be a read active already, but let's check just to be
1161  * sure.
1162  */
1163  if (PqCommReadingMsg)
1164  ereport(FATAL,
1165  (errcode(ERRCODE_PROTOCOL_VIOLATION),
1166  errmsg("terminating connection because protocol synchronization was lost")));
1167 
1168  PqCommReadingMsg = true;
1169 }
int errcode(int sqlerrcode)
Definition: elog.c:575
#define FATAL
Definition: elog.h:52
#define ereport(elevel, rest)
Definition: elog.h:122
int errmsg(const char *fmt,...)
Definition: elog.c:797
static bool PqCommReadingMsg
Definition: pqcomm.c:131
void RemoveSocketFiles ( void  )

Definition at line 836 of file pqcomm.c.

References lfirst, NIL, and unlink().

Referenced by CloseServerPorts().

837 {
838  ListCell *l;
839 
840  /* Loop through all created sockets... */
841  foreach(l, sock_paths)
842  {
843  char *sock_path = (char *) lfirst(l);
844 
845  /* Ignore any error. */
846  (void) unlink(sock_path);
847  }
848  /* Since we're about to exit, no need to reclaim storage */
849  sock_paths = NIL;
850 }
#define NIL
Definition: pg_list.h:69
static List * sock_paths
Definition: pqcomm.c:106
int unlink(const char *filename)
#define lfirst(lc)
Definition: pg_list.h:106
void secure_close ( Port port)

Definition at line 125 of file be-secure.c.

References be_tls_close(), and Port::ssl_in_use.

Referenced by ConnFree(), and socket_close().

126 {
127 #ifdef USE_SSL
128  if (port->ssl_in_use)
129  be_tls_close(port);
130 #endif
131 }
bool ssl_in_use
Definition: libpq-be.h:181
void be_tls_close(Port *port)
void secure_destroy ( void  )

Definition at line 86 of file be-secure.c.

References be_tls_destroy().

Referenced by SIGHUP_handler().

87 {
88 #ifdef USE_SSL
90 #endif
91 }
void be_tls_destroy(void)
int secure_initialize ( bool  isServerStart)

Definition at line 73 of file be-secure.c.

References be_tls_init().

Referenced by PostmasterMain(), and SIGHUP_handler().

74 {
75 #ifdef USE_SSL
76  return be_tls_init(isServerStart);
77 #else
78  return 0;
79 #endif
80 }
int be_tls_init(bool isServerStart)
bool secure_loaded_verify_locations ( void  )

Definition at line 97 of file be-secure.c.

References ssl_loaded_verify_locations.

Referenced by ClientAuthentication().

98 {
99 #ifdef USE_SSL
101 #else
102  return false;
103 #endif
104 }
bool ssl_loaded_verify_locations
int secure_open_server ( Port port)

Definition at line 110 of file be-secure.c.

References be_tls_open_server().

Referenced by ProcessStartupPacket().

111 {
112  int r = 0;
113 
114 #ifdef USE_SSL
115  r = be_tls_open_server(port);
116 #endif
117 
118  return r;
119 }
int be_tls_open_server(Port *port)
ssize_t secure_raw_read ( Port port,
void *  ptr,
size_t  len 
)

Definition at line 216 of file be-secure.c.

References pgwin32_noblock, recv, and Port::sock.

Referenced by my_sock_read(), and secure_read().

217 {
218  ssize_t n;
219 
220  /*
221  * Try to read from the socket without blocking. If it succeeds we're
222  * done, otherwise we'll wait for the socket using the latch mechanism.
223  */
224 #ifdef WIN32
225  pgwin32_noblock = true;
226 #endif
227  n = recv(port->sock, ptr, len, 0);
228 #ifdef WIN32
229  pgwin32_noblock = false;
230 #endif
231 
232  return n;
233 }
int pgwin32_noblock
Definition: socket.c:28
#define recv(s, buf, len, flags)
Definition: win32.h:385
pgsocket sock
Definition: libpq-be.h:118
ssize_t secure_raw_write ( Port port,
const void *  ptr,
size_t  len 
)

Definition at line 302 of file be-secure.c.

References pgwin32_noblock, send, and Port::sock.

Referenced by my_sock_write(), and secure_write().

303 {
304  ssize_t n;
305 
306 #ifdef WIN32
307  pgwin32_noblock = true;
308 #endif
309  n = send(port->sock, ptr, len, 0);
310 #ifdef WIN32
311  pgwin32_noblock = false;
312 #endif
313 
314  return n;
315 }
#define send(s, buf, len, flags)
Definition: win32.h:386
int pgwin32_noblock
Definition: socket.c:28
pgsocket sock
Definition: libpq-be.h:118
ssize_t secure_read ( Port port,
void *  ptr,
size_t  len 
)

Definition at line 137 of file be-secure.c.

References Assert, be_tls_read(), EAGAIN, ereport, errcode(), errmsg(), WaitEvent::events, EWOULDBLOCK, FATAL, FeBeWaitSet, ModifyWaitEvent(), MyLatch, NULL, ProcessClientReadInterrupt(), ResetLatch(), secure_raw_read(), Port::ssl_in_use, WAIT_EVENT_CLIENT_READ, WaitEventSetWait(), WL_LATCH_SET, WL_POSTMASTER_DEATH, and WL_SOCKET_READABLE.

Referenced by pq_getbyte_if_available(), and pq_recvbuf().

138 {
139  ssize_t n;
140  int waitfor;
141 
142 retry:
143 #ifdef USE_SSL
144  waitfor = 0;
145  if (port->ssl_in_use)
146  {
147  n = be_tls_read(port, ptr, len, &waitfor);
148  }
149  else
150 #endif
151  {
152  n = secure_raw_read(port, ptr, len);
153  waitfor = WL_SOCKET_READABLE;
154  }
155 
156  /* In blocking mode, wait until the socket is ready */
157  if (n < 0 && !port->noblock && (errno == EWOULDBLOCK || errno == EAGAIN))
158  {
159  WaitEvent event;
160 
161  Assert(waitfor);
162 
163  ModifyWaitEvent(FeBeWaitSet, 0, waitfor, NULL);
164 
165  WaitEventSetWait(FeBeWaitSet, -1 /* no timeout */ , &event, 1,
167 
168  /*
169  * If the postmaster has died, it's not safe to continue running,
170  * because it is the postmaster's job to kill us if some other backend
171  * exists uncleanly. Moreover, we won't run very well in this state;
172  * helper processes like walwriter and the bgwriter will exit, so
173  * performance may be poor. Finally, if we don't exit, pg_ctl will be
174  * unable to restart the postmaster without manual intervention, so no
175  * new connections can be accepted. Exiting clears the deck for a
176  * postmaster restart.
177  *
178  * (Note that we only make this check when we would otherwise sleep on
179  * our latch. We might still continue running for a while if the
180  * postmaster is killed in mid-query, or even through multiple queries
181  * if we never have to wait for read. We don't want to burn too many
182  * cycles checking for this very rare condition, and this should cause
183  * us to exit quickly in most cases.)
184  */
185  if (event.events & WL_POSTMASTER_DEATH)
186  ereport(FATAL,
187  (errcode(ERRCODE_ADMIN_SHUTDOWN),
188  errmsg("terminating connection due to unexpected postmaster exit")));
189 
190  /* Handle interrupt. */
191  if (event.events & WL_LATCH_SET)
192  {
195 
196  /*
197  * We'll retry the read. Most likely it will return immediately
198  * because there's still no data available, and we'll wait for the
199  * socket to become ready again.
200  */
201  }
202  goto retry;
203  }
204 
205  /*
206  * Process interrupts that happened while (or before) receiving. Note that
207  * we signal that we're not blocking, which will prevent some types of
208  * interrupts from being processed.
209  */
211 
212  return n;
213 }
#define EWOULDBLOCK
Definition: win32.h:301
ssize_t be_tls_read(Port *port, void *ptr, size_t len, int *waitfor)
int errcode(int sqlerrcode)
Definition: elog.c:575
void ModifyWaitEvent(WaitEventSet *set, int pos, uint32 events, Latch *latch)
Definition: latch.c:685
bool ssl_in_use
Definition: libpq-be.h:181
#define WL_SOCKET_READABLE
Definition: latch.h:125
WaitEventSet * FeBeWaitSet
Definition: pqcomm.c:167
void ResetLatch(volatile Latch *latch)
Definition: latch.c:461
#define EAGAIN
Definition: win32.h:293
#define FATAL
Definition: elog.h:52
uint32 events
Definition: latch.h:133
#define ereport(elevel, rest)
Definition: elog.h:122
#define WL_POSTMASTER_DEATH
Definition: latch.h:128
void ProcessClientReadInterrupt(bool blocked)
Definition: postgres.c:522
ssize_t secure_raw_read(Port *port, void *ptr, size_t len)
Definition: be-secure.c:216
#define NULL
Definition: c.h:226
#define Assert(condition)
Definition: c.h:671
int errmsg(const char *fmt,...)
Definition: elog.c:797
struct Latch * MyLatch
Definition: globals.c:51
#define WL_LATCH_SET
Definition: latch.h:124
int WaitEventSetWait(WaitEventSet *set, long timeout, WaitEvent *occurred_events, int nevents, uint32 wait_event_info)
Definition: latch.c:870
ssize_t secure_write ( Port port,
void *  ptr,
size_t  len 
)

Definition at line 240 of file be-secure.c.

References Assert, be_tls_write(), EAGAIN, ereport, errcode(), errmsg(), WaitEvent::events, EWOULDBLOCK, FATAL, FeBeWaitSet, ModifyWaitEvent(), MyLatch, NULL, ProcessClientWriteInterrupt(), ResetLatch(), secure_raw_write(), Port::ssl_in_use, WAIT_EVENT_CLIENT_WRITE, WaitEventSetWait(), WL_LATCH_SET, WL_POSTMASTER_DEATH, and WL_SOCKET_WRITEABLE.

Referenced by internal_flush().

241 {
242  ssize_t n;
243  int waitfor;
244 
245 retry:
246  waitfor = 0;
247 #ifdef USE_SSL
248  if (port->ssl_in_use)
249  {
250  n = be_tls_write(port, ptr, len, &waitfor);
251  }
252  else
253 #endif
254  {
255  n = secure_raw_write(port, ptr, len);
256  waitfor = WL_SOCKET_WRITEABLE;
257  }
258 
259  if (n < 0 && !port->noblock && (errno == EWOULDBLOCK || errno == EAGAIN))
260  {
261  WaitEvent event;
262 
263  Assert(waitfor);
264 
265  ModifyWaitEvent(FeBeWaitSet, 0, waitfor, NULL);
266 
267  WaitEventSetWait(FeBeWaitSet, -1 /* no timeout */ , &event, 1,
269 
270  /* See comments in secure_read. */
271  if (event.events & WL_POSTMASTER_DEATH)
272  ereport(FATAL,
273  (errcode(ERRCODE_ADMIN_SHUTDOWN),
274  errmsg("terminating connection due to unexpected postmaster exit")));
275 
276  /* Handle interrupt. */
277  if (event.events & WL_LATCH_SET)
278  {
281 
282  /*
283  * We'll retry the write. Most likely it will return immediately
284  * because there's still no data available, and we'll wait for the
285  * socket to become ready again.
286  */
287  }
288  goto retry;
289  }
290 
291  /*
292  * Process interrupts that happened while (or before) sending. Note that
293  * we signal that we're not blocking, which will prevent some types of
294  * interrupts from being processed.
295  */
297 
298  return n;
299 }
#define EWOULDBLOCK
Definition: win32.h:301
#define WL_SOCKET_WRITEABLE
Definition: latch.h:126
ssize_t secure_raw_write(Port *port, const void *ptr, size_t len)
Definition: be-secure.c:302
int errcode(int sqlerrcode)
Definition: elog.c:575
void ModifyWaitEvent(WaitEventSet *set, int pos, uint32 events, Latch *latch)
Definition: latch.c:685
bool ssl_in_use
Definition: libpq-be.h:181
WaitEventSet * FeBeWaitSet
Definition: pqcomm.c:167
void ResetLatch(volatile Latch *latch)
Definition: latch.c:461
#define EAGAIN
Definition: win32.h:293
#define FATAL
Definition: elog.h:52
uint32 events
Definition: latch.h:133
ssize_t be_tls_write(Port *port, void *ptr, size_t len, int *waitfor)
#define ereport(elevel, rest)
Definition: elog.h:122
#define WL_POSTMASTER_DEATH
Definition: latch.h:128
#define NULL
Definition: c.h:226
#define Assert(condition)
Definition: c.h:671
int errmsg(const char *fmt,...)
Definition: elog.c:797
struct Latch * MyLatch
Definition: globals.c:51
#define WL_LATCH_SET
Definition: latch.h:124
int WaitEventSetWait(WaitEventSet *set, long timeout, WaitEvent *occurred_events, int nevents, uint32 wait_event_info)
Definition: latch.c:870
void ProcessClientWriteInterrupt(bool blocked)
Definition: postgres.c:560
void StreamClose ( pgsocket  sock)

Definition at line 791 of file pqcomm.c.

References closesocket.

Referenced by ClosePostmasterPorts(), CloseServerPorts(), ConnCreate(), and ServerLoop().

792 {
793  closesocket(sock);
794 }
#define closesocket
Definition: port.h:328
int StreamConnection ( pgsocket  server_fd,
Port port 
)

Definition at line 663 of file pqcomm.c.

References accept, SockAddr::addr, elog, ereport, errcode_for_socket_access(), errmsg(), IS_AF_UNIX, Port::laddr, LOG, pg_usleep(), PGINVALID_SOCKET, PQ_SEND_BUFFER_SIZE, pq_setkeepalivescount(), pq_setkeepalivesidle(), pq_setkeepalivesinterval(), Port::raddr, SockAddr::salen, Port::sock, STATUS_ERROR, STATUS_OK, tcp_keepalives_count, tcp_keepalives_idle, and tcp_keepalives_interval.

Referenced by ConnCreate().

664 {
665  /* accept connection and fill in the client (remote) address */
666  port->raddr.salen = sizeof(port->raddr.addr);
667  if ((port->sock = accept(server_fd,
668  (struct sockaddr *) & port->raddr.addr,
669  &port->raddr.salen)) == PGINVALID_SOCKET)
670  {
671  ereport(LOG,
673  errmsg("could not accept new connection: %m")));
674 
675  /*
676  * If accept() fails then postmaster.c will still see the server
677  * socket as read-ready, and will immediately try again. To avoid
678  * uselessly sucking lots of CPU, delay a bit before trying again.
679  * (The most likely reason for failure is being out of kernel file
680  * table slots; we can do little except hope some will get freed up.)
681  */
682  pg_usleep(100000L); /* wait 0.1 sec */
683  return STATUS_ERROR;
684  }
685 
686  /* fill in the server (local) address */
687  port->laddr.salen = sizeof(port->laddr.addr);
688  if (getsockname(port->sock,
689  (struct sockaddr *) & port->laddr.addr,
690  &port->laddr.salen) < 0)
691  {
692  elog(LOG, "getsockname() failed: %m");
693  return STATUS_ERROR;
694  }
695 
696  /* select NODELAY and KEEPALIVE options if it's a TCP connection */
697  if (!IS_AF_UNIX(port->laddr.addr.ss_family))
698  {
699  int on;
700 #ifdef WIN32
701  int oldopt;
702  int optlen;
703  int newopt;
704 #endif
705 
706 #ifdef TCP_NODELAY
707  on = 1;
708  if (setsockopt(port->sock, IPPROTO_TCP, TCP_NODELAY,
709  (char *) &on, sizeof(on)) < 0)
710  {
711  elog(LOG, "setsockopt(TCP_NODELAY) failed: %m");
712  return STATUS_ERROR;
713  }
714 #endif
715  on = 1;
716  if (setsockopt(port->sock, SOL_SOCKET, SO_KEEPALIVE,
717  (char *) &on, sizeof(on)) < 0)
718  {
719  elog(LOG, "setsockopt(SO_KEEPALIVE) failed: %m");
720  return STATUS_ERROR;
721  }
722 
723 #ifdef WIN32
724 
725  /*
726  * This is a Win32 socket optimization. The OS send buffer should be
727  * large enough to send the whole Postgres send buffer in one go, or
728  * performance suffers. The Postgres send buffer can be enlarged if a
729  * very large message needs to be sent, but we won't attempt to
730  * enlarge the OS buffer if that happens, so somewhat arbitrarily
731  * ensure that the OS buffer is at least PQ_SEND_BUFFER_SIZE * 4.
732  * (That's 32kB with the current default).
733  *
734  * The default OS buffer size used to be 8kB in earlier Windows
735  * versions, but was raised to 64kB in Windows 2012. So it shouldn't
736  * be necessary to change it in later versions anymore. Changing it
737  * unnecessarily can even reduce performance, because setting
738  * SO_SNDBUF in the application disables the "dynamic send buffering"
739  * feature that was introduced in Windows 7. So before fiddling with
740  * SO_SNDBUF, check if the current buffer size is already large enough
741  * and only increase it if necessary.
742  *
743  * See https://support.microsoft.com/kb/823764/EN-US/ and
744  * https://msdn.microsoft.com/en-us/library/bb736549%28v=vs.85%29.aspx
745  */
746  optlen = sizeof(oldopt);
747  if (getsockopt(port->sock, SOL_SOCKET, SO_SNDBUF, (char *) &oldopt,
748  &optlen) < 0)
749  {
750  elog(LOG, "getsockopt(SO_SNDBUF) failed: %m");
751  return STATUS_ERROR;
752  }
753  newopt = PQ_SEND_BUFFER_SIZE * 4;
754  if (oldopt < newopt)
755  {
756  if (setsockopt(port->sock, SOL_SOCKET, SO_SNDBUF, (char *) &newopt,
757  sizeof(newopt)) < 0)
758  {
759  elog(LOG, "setsockopt(SO_SNDBUF) failed: %m");
760  return STATUS_ERROR;
761  }
762  }
763 #endif
764 
765  /*
766  * Also apply the current keepalive parameters. If we fail to set a
767  * parameter, don't error out, because these aren't universally
768  * supported. (Note: you might think we need to reset the GUC
769  * variables to 0 in such a case, but it's not necessary because the
770  * show hooks for these variables report the truth anyway.)
771  */
775  }
776 
777  return STATUS_OK;
778 }
#define accept(s, addr, addrlen)
Definition: win32.h:382
int pq_setkeepalivesinterval(int interval, Port *port)
Definition: pqcomm.c:1776
struct sockaddr_storage addr
Definition: pqcomm.h:64
#define STATUS_ERROR
Definition: c.h:972
#define LOG
Definition: elog.h:26
pgsocket sock
Definition: libpq-be.h:118
int tcp_keepalives_idle
Definition: guc.c:473
SockAddr raddr
Definition: libpq-be.h:122
void pg_usleep(long microsec)
Definition: signal.c:53
int pq_setkeepalivesidle(int idle, Port *port)
Definition: pqcomm.c:1687
#define IS_AF_UNIX(fam)
Definition: ip.h:24
ACCEPT_TYPE_ARG3 salen
Definition: pqcomm.h:65
#define ereport(elevel, rest)
Definition: elog.h:122
#define STATUS_OK
Definition: c.h:971
int tcp_keepalives_interval
Definition: guc.c:474
int errcode_for_socket_access(void)
Definition: elog.c:669
SockAddr laddr
Definition: libpq-be.h:121
#define PGINVALID_SOCKET
Definition: port.h:24
int pq_setkeepalivescount(int count, Port *port)
Definition: pqcomm.c:1852
int errmsg(const char *fmt,...)
Definition: elog.c:797
int tcp_keepalives_count
Definition: guc.c:475
#define elog
Definition: elog.h:219
#define PQ_SEND_BUFFER_SIZE
Definition: pqcomm.c:115
int StreamServerPort ( int  family,
char *  hostName,
unsigned short  portNumber,
char *  unixSocketDir,
pgsocket  ListenSocket[],
int  MaxListen 
)

Definition at line 311 of file pqcomm.c.

References _, addrinfo::ai_family, addrinfo::ai_flags, addrinfo::ai_next, AI_PASSIVE, addrinfo::ai_socktype, bind, closesocket, ereport, errcode_for_socket_access(), errhint(), errmsg(), fd(), gai_strerror, IS_AF_UNIX, listen, LOG, MaxBackends, MAXPGPATH, MemSet, NULL, pg_freeaddrinfo_all(), pg_getaddrinfo_all(), PG_SOMAXCONN, PGINVALID_SOCKET, snprintf(), socket, STATUS_ERROR, STATUS_OK, UNIXSOCK_PATH, and UNIXSOCK_PATH_BUFLEN.

Referenced by PostmasterMain().

314 {
315  pgsocket fd;
316  int err;
317  int maxconn;
318  int ret;
319  char portNumberStr[32];
320  const char *familyDesc;
321  char familyDescBuf[64];
322  char *service;
323  struct addrinfo *addrs = NULL,
324  *addr;
325  struct addrinfo hint;
326  int listen_index = 0;
327  int added = 0;
328 
329 #ifdef HAVE_UNIX_SOCKETS
330  char unixSocketPath[MAXPGPATH];
331 #endif
332 #if !defined(WIN32) || defined(IPV6_V6ONLY)
333  int one = 1;
334 #endif
335 
336  /* Initialize hint structure */
337  MemSet(&hint, 0, sizeof(hint));
338  hint.ai_family = family;
339  hint.ai_flags = AI_PASSIVE;
340  hint.ai_socktype = SOCK_STREAM;
341 
342 #ifdef HAVE_UNIX_SOCKETS
343  if (family == AF_UNIX)
344  {
345  /*
346  * Create unixSocketPath from portNumber and unixSocketDir and lock
347  * that file path
348  */
349  UNIXSOCK_PATH(unixSocketPath, portNumber, unixSocketDir);
350  if (strlen(unixSocketPath) >= UNIXSOCK_PATH_BUFLEN)
351  {
352  ereport(LOG,
353  (errmsg("Unix-domain socket path \"%s\" is too long (maximum %d bytes)",
354  unixSocketPath,
355  (int) (UNIXSOCK_PATH_BUFLEN - 1))));
356  return STATUS_ERROR;
357  }
358  if (Lock_AF_UNIX(unixSocketDir, unixSocketPath) != STATUS_OK)
359  return STATUS_ERROR;
360  service = unixSocketPath;
361  }
362  else
363 #endif /* HAVE_UNIX_SOCKETS */
364  {
365  snprintf(portNumberStr, sizeof(portNumberStr), "%d", portNumber);
366  service = portNumberStr;
367  }
368 
369  ret = pg_getaddrinfo_all(hostName, service, &hint, &addrs);
370  if (ret || !addrs)
371  {
372  if (hostName)
373  ereport(LOG,
374  (errmsg("could not translate host name \"%s\", service \"%s\" to address: %s",
375  hostName, service, gai_strerror(ret))));
376  else
377  ereport(LOG,
378  (errmsg("could not translate service \"%s\" to address: %s",
379  service, gai_strerror(ret))));
380  if (addrs)
381  pg_freeaddrinfo_all(hint.ai_family, addrs);
382  return STATUS_ERROR;
383  }
384 
385  for (addr = addrs; addr; addr = addr->ai_next)
386  {
387  if (!IS_AF_UNIX(family) && IS_AF_UNIX(addr->ai_family))
388  {
389  /*
390  * Only set up a unix domain socket when they really asked for it.
391  * The service/port is different in that case.
392  */
393  continue;
394  }
395 
396  /* See if there is still room to add 1 more socket. */
397  for (; listen_index < MaxListen; listen_index++)
398  {
399  if (ListenSocket[listen_index] == PGINVALID_SOCKET)
400  break;
401  }
402  if (listen_index >= MaxListen)
403  {
404  ereport(LOG,
405  (errmsg("could not bind to all requested addresses: MAXLISTEN (%d) exceeded",
406  MaxListen)));
407  break;
408  }
409 
410  /* set up family name for possible error messages */
411  switch (addr->ai_family)
412  {
413  case AF_INET:
414  familyDesc = _("IPv4");
415  break;
416 #ifdef HAVE_IPV6
417  case AF_INET6:
418  familyDesc = _("IPv6");
419  break;
420 #endif
421 #ifdef HAVE_UNIX_SOCKETS
422  case AF_UNIX:
423  familyDesc = _("Unix");
424  break;
425 #endif
426  default:
427  snprintf(familyDescBuf, sizeof(familyDescBuf),
428  _("unrecognized address family %d"),
429  addr->ai_family);
430  familyDesc = familyDescBuf;
431  break;
432  }
433 
434  if ((fd = socket(addr->ai_family, SOCK_STREAM, 0)) == PGINVALID_SOCKET)
435  {
436  ereport(LOG,
438  /* translator: %s is IPv4, IPv6, or Unix */
439  errmsg("could not create %s socket: %m",
440  familyDesc)));
441  continue;
442  }
443 
444 #ifndef WIN32
445 
446  /*
447  * Without the SO_REUSEADDR flag, a new postmaster can't be started
448  * right away after a stop or crash, giving "address already in use"
449  * error on TCP ports.
450  *
451  * On win32, however, this behavior only happens if the
452  * SO_EXLUSIVEADDRUSE is set. With SO_REUSEADDR, win32 allows multiple
453  * servers to listen on the same address, resulting in unpredictable
454  * behavior. With no flags at all, win32 behaves as Unix with
455  * SO_REUSEADDR.
456  */
457  if (!IS_AF_UNIX(addr->ai_family))
458  {
459  if ((setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
460  (char *) &one, sizeof(one))) == -1)
461  {
462  ereport(LOG,
464  errmsg("setsockopt(SO_REUSEADDR) failed: %m")));
465  closesocket(fd);
466  continue;
467  }
468  }
469 #endif
470 
471 #ifdef IPV6_V6ONLY
472  if (addr->ai_family == AF_INET6)
473  {
474  if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY,
475  (char *) &one, sizeof(one)) == -1)
476  {
477  ereport(LOG,
479  errmsg("setsockopt(IPV6_V6ONLY) failed: %m")));
480  closesocket(fd);
481  continue;
482  }
483  }
484 #endif
485 
486  /*
487  * Note: This might fail on some OS's, like Linux older than
488  * 2.4.21-pre3, that don't have the IPV6_V6ONLY socket option, and map
489  * ipv4 addresses to ipv6. It will show ::ffff:ipv4 for all ipv4
490  * connections.
491  */
492  err = bind(fd, addr->ai_addr, addr->ai_addrlen);
493  if (err < 0)
494  {
495  ereport(LOG,
497  /* translator: %s is IPv4, IPv6, or Unix */
498  errmsg("could not bind %s socket: %m",
499  familyDesc),
500  (IS_AF_UNIX(addr->ai_family)) ?
501  errhint("Is another postmaster already running on port %d?"
502  " If not, remove socket file \"%s\" and retry.",
503  (int) portNumber, service) :
504  errhint("Is another postmaster already running on port %d?"
505  " If not, wait a few seconds and retry.",
506  (int) portNumber)));
507  closesocket(fd);
508  continue;
509  }
510 
511 #ifdef HAVE_UNIX_SOCKETS
512  if (addr->ai_family == AF_UNIX)
513  {
514  if (Setup_AF_UNIX(service) != STATUS_OK)
515  {
516  closesocket(fd);
517  break;
518  }
519  }
520 #endif
521 
522  /*
523  * Select appropriate accept-queue length limit. PG_SOMAXCONN is only
524  * intended to provide a clamp on the request on platforms where an
525  * overly large request provokes a kernel error (are there any?).
526  */
527  maxconn = MaxBackends * 2;
528  if (maxconn > PG_SOMAXCONN)
529  maxconn = PG_SOMAXCONN;
530 
531  err = listen(fd, maxconn);
532  if (err < 0)
533  {
534  ereport(LOG,
536  /* translator: %s is IPv4, IPv6, or Unix */
537  errmsg("could not listen on %s socket: %m",
538  familyDesc)));
539  closesocket(fd);
540  continue;
541  }
542  ListenSocket[listen_index] = fd;
543  added++;
544  }
545 
546  pg_freeaddrinfo_all(hint.ai_family, addrs);
547 
548  if (!added)
549  return STATUS_ERROR;
550 
551  return STATUS_OK;
552 }
void pg_freeaddrinfo_all(int hint_ai_family, struct addrinfo *ai)
Definition: ip.c:88
#define UNIXSOCK_PATH(path, port, sockdir)
Definition: pqcomm.h:70
int errhint(const char *fmt,...)
Definition: elog.c:987
#define UNIXSOCK_PATH_BUFLEN
Definition: pqcomm.h:86
#define closesocket
Definition: port.h:328
#define socket(af, type, protocol)
Definition: win32.h:379
#define STATUS_ERROR
Definition: c.h:972
#define MemSet(start, val, len)
Definition: c.h:853
int snprintf(char *str, size_t count, const char *fmt,...) pg_attribute_printf(3
#define LOG
Definition: elog.h:26
static int fd(const char *x, int i)
Definition: preproc-init.c:105
#define gai_strerror
Definition: getaddrinfo.h:148
int pg_getaddrinfo_all(const char *hostname, const char *servname, const struct addrinfo *hintp, struct addrinfo **result)
Definition: ip.c:57
#define bind(s, addr, addrlen)
Definition: win32.h:380
#define IS_AF_UNIX(fam)
Definition: ip.h:24
#define MAXPGPATH
int MaxBackends
Definition: globals.c:126
#define AI_PASSIVE
Definition: getaddrinfo.h:64
int pgsocket
Definition: port.h:22
#define ereport(elevel, rest)
Definition: elog.h:122
#define STATUS_OK
Definition: c.h:971
int errcode_for_socket_access(void)
Definition: elog.c:669
static pgsocket ListenSocket[MAXLISTEN]
Definition: postmaster.c:215
#define listen(s, backlog)
Definition: win32.h:381
#define PGINVALID_SOCKET
Definition: port.h:24
#define PG_SOMAXCONN
#define NULL
Definition: c.h:226
struct addrinfo * ai_next
Definition: getaddrinfo.h:109
int errmsg(const char *fmt,...)
Definition: elog.c:797
#define _(x)
Definition: elog.c:84
void TouchSocketFiles ( void  )

Definition at line 806 of file pqcomm.c.

References lfirst, and NULL.

Referenced by ServerLoop().

807 {
808  ListCell *l;
809 
810  /* Loop through all created sockets... */
811  foreach(l, sock_paths)
812  {
813  char *sock_path = (char *) lfirst(l);
814 
815  /*
816  * utime() is POSIX standard, utimes() is a common alternative. If we
817  * have neither, there's no way to affect the mod or access time of
818  * the socket :-(
819  *
820  * In either path, we ignore errors; there's no point in complaining.
821  */
822 #ifdef HAVE_UTIME
823  utime(sock_path, NULL);
824 #else /* !HAVE_UTIME */
825 #ifdef HAVE_UTIMES
826  utimes(sock_path, NULL);
827 #endif /* HAVE_UTIMES */
828 #endif /* HAVE_UTIME */
829  }
830 }
static List * sock_paths
Definition: pqcomm.c:106
#define NULL
Definition: c.h:226
#define lfirst(lc)
Definition: pg_list.h:106

Variable Documentation

WaitEventSet* FeBeWaitSet

Definition at line 167 of file pqcomm.c.

Referenced by secure_read(), secure_write(), SwitchBackToLocalLatch(), and SwitchToSharedLatch().

PGDLLIMPORT PQcommMethods* PqCommMethods

Definition at line 165 of file pqcomm.c.

Referenced by pq_redirect_to_shm_mq(), and pq_set_parallel_master().

char* ssl_ca_file

Definition at line 45 of file be-secure.c.

Referenced by be_tls_init().

char* ssl_cert_file

Definition at line 43 of file be-secure.c.

Referenced by be_tls_init().

char* ssl_crl_file

Definition at line 46 of file be-secure.c.

Referenced by be_tls_init().

char* ssl_key_file

Definition at line 44 of file be-secure.c.

Referenced by be_tls_init().

bool ssl_loaded_verify_locations
char* SSLCipherSuites

Definition at line 53 of file be-secure.c.

Referenced by be_tls_init().

char* SSLECDHCurve

Definition at line 56 of file be-secure.c.

Referenced by initialize_ecdh().

bool SSLPreferServerCiphers

Definition at line 59 of file be-secure.c.

Referenced by be_tls_init().