Sets the access permissions of the Unix-domain socket. Unix-domain
+> Sets the access permissions of the Unix-domain socket(s). Unix-domain
sockets use the usual Unix file system permission set.
The parameter value is expected to be a numeric mode
specified in the format accepted by the
diff --git a/doc/src/sgml/html/runtime-config-short.html b/doc/src/sgml/html/runtime-config-short.html
index 8c39c2f..f0d7080 100644
--- a/doc/src/sgml/html/runtime-config-short.html
+++ b/doc/src/sgml/html/runtime-config-short.html
@@ -330,7 +330,7 @@ CLASS="REPLACEABLE"
>
unix_socket_directory = unix_socket_directories = x
Specifies the directory of the Unix-domain socket on which
postgres is to listen for
- connections from client applications. The default is normally
- /tmp, but can be changed at build time.
+ connections from client applications. The value can also be a
+ comma-separated list of directories. An empty value
+ specifies not listening on any Unix-domain sockets, in which case
+ only TCP/IP sockets can be used to connect to the server.
+ The default value is normally
+ /tmp, but that can be changed at build time.
+ Specifying this option is equivalent to setting the configuration parameter.
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index cfd3532..e6c9eaa 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -1800,7 +1800,7 @@ pg_dumpall -p 5432 | psql -d postgres -p 5433
The simplest way to prevent spoofing for local
connections is to use a Unix domain socket directory () that has write permission only
+ linkend="guc-unix-socket-directories">) that has write permission only
for a trusted local user. This prevents a malicious user from creating
their own socket file in that directory. If you are concerned that
some applications might still reference /tmp for the
diff --git a/src/backend/libpq/pqcomm.c b/src/backend/libpq/pqcomm.c
index aeeffd7..b7e0d09 100644
--- a/src/backend/libpq/pqcomm.c
+++ b/src/backend/libpq/pqcomm.c
@@ -42,7 +42,7 @@
* StreamServerPort - Open postmaster's server port
* StreamConnection - Create new connection with client
* StreamClose - Close a client/backend connection
- * TouchSocketFile - Protect socket file against /tmp cleaners
+ * TouchSocketFiles - Protect socket files against /tmp cleaners
* pq_init - initialize libpq at backend startup
* pq_comm_reset - reset libpq during error recovery
* pq_close - shutdown libpq at backend exit
@@ -103,8 +103,8 @@ int Unix_socket_permissions;
char *Unix_socket_group;
-/* Where the Unix socket file is */
-static char sock_path[MAXPGPATH];
+/* Where the Unix socket files are (list of palloc'd strings) */
+static List *sock_paths = NIL;
/*
@@ -141,8 +141,8 @@ static int internal_flush(void);
static void pq_set_nonblocking(bool nonblocking);
#ifdef HAVE_UNIX_SOCKETS
-static int Lock_AF_UNIX(unsigned short portNumber, char *unixSocketName);
-static int Setup_AF_UNIX(void);
+static int Lock_AF_UNIX(char *unixSocketDir, char *unixSocketPath);
+static int Setup_AF_UNIX(char *sock_path);
#endif /* HAVE_UNIX_SOCKETS */
@@ -236,29 +236,43 @@ pq_close(int code, Datum arg)
/* StreamDoUnlink()
* Shutdown routine for backend connection
- * If a Unix socket is used for communication, explicitly close it.
+ * If any Unix sockets are used for communication, explicitly close them.
*/
#ifdef HAVE_UNIX_SOCKETS
static void
StreamDoUnlink(int code, Datum arg)
{
- Assert(sock_path[0]);
- unlink(sock_path);
+ ListCell *l;
+
+ /* Loop through all created sockets... */
+ foreach(l, sock_paths)
+ {
+ char *sock_path = (char *) lfirst(l);
+
+ unlink(sock_path);
+ }
+ /* Since we're about to exit, no need to reclaim storage */
+ sock_paths = NIL;
}
#endif /* HAVE_UNIX_SOCKETS */
/*
* StreamServerPort -- open a "listening" port to accept connections.
*
- * Successfully opened sockets are added to the ListenSocket[] array,
- * at the first position that isn't PGINVALID_SOCKET.
+ * family should be AF_UNIX or AF_UNSPEC; portNumber is the port number.
+ * For AF_UNIX ports, hostName should be NULL and unixSocketDir must be
+ * specified. For TCP ports, hostName is either NULL for all interfaces or
+ * the interface to listen on, and unixSocketDir is ignored (can be NULL).
+ *
+ * Successfully opened sockets are added to the ListenSocket[] array (of
+ * length MaxListen), at the first position that isn't PGINVALID_SOCKET.
*
* RETURNS: STATUS_OK or STATUS_ERROR
*/
int
StreamServerPort(int family, char *hostName, unsigned short portNumber,
- char *unixSocketName,
+ char *unixSocketDir,
pgsocket ListenSocket[], int MaxListen)
{
pgsocket fd;
@@ -275,6 +289,9 @@ StreamServerPort(int family, char *hostName, unsigned short portNumber,
int listen_index = 0;
int added = 0;
+#ifdef HAVE_UNIX_SOCKETS
+ char unixSocketPath[MAXPGPATH];
+#endif
#if !defined(WIN32) || defined(IPV6_V6ONLY)
int one = 1;
#endif
@@ -288,10 +305,22 @@ StreamServerPort(int family, char *hostName, unsigned short portNumber,
#ifdef HAVE_UNIX_SOCKETS
if (family == AF_UNIX)
{
- /* Lock_AF_UNIX will also fill in sock_path. */
- if (Lock_AF_UNIX(portNumber, unixSocketName) != STATUS_OK)
+ /*
+ * Create unixSocketPath from portNumber and unixSocketDir and lock
+ * that file path
+ */
+ UNIXSOCK_PATH(unixSocketPath, portNumber, unixSocketDir);
+ if (strlen(unixSocketPath) >= UNIXSOCK_PATH_BUFLEN)
+ {
+ ereport(LOG,
+ (errmsg("Unix-domain socket path \"%s\" is too long (maximum %d bytes)",
+ unixSocketPath,
+ (int) (UNIXSOCK_PATH_BUFLEN - 1))));
return STATUS_ERROR;
- service = sock_path;
+ }
+ if (Lock_AF_UNIX(unixSocketDir, unixSocketPath) != STATUS_OK)
+ return STATUS_ERROR;
+ service = unixSocketPath;
}
else
#endif /* HAVE_UNIX_SOCKETS */
@@ -434,7 +463,7 @@ StreamServerPort(int family, char *hostName, unsigned short portNumber,
(IS_AF_UNIX(addr->ai_family)) ?
errhint("Is another postmaster already running on port %d?"
" If not, remove socket file \"%s\" and retry.",
- (int) portNumber, sock_path) :
+ (int) portNumber, service) :
errhint("Is another postmaster already running on port %d?"
" If not, wait a few seconds and retry.",
(int) portNumber)));
@@ -445,7 +474,7 @@ StreamServerPort(int family, char *hostName, unsigned short portNumber,
#ifdef HAVE_UNIX_SOCKETS
if (addr->ai_family == AF_UNIX)
{
- if (Setup_AF_UNIX() != STATUS_OK)
+ if (Setup_AF_UNIX(service) != STATUS_OK)
{
closesocket(fd);
break;
@@ -492,18 +521,8 @@ StreamServerPort(int family, char *hostName, unsigned short portNumber,
* Lock_AF_UNIX -- configure unix socket file path
*/
static int
-Lock_AF_UNIX(unsigned short portNumber, char *unixSocketName)
+Lock_AF_UNIX(char *unixSocketDir, char *unixSocketPath)
{
- UNIXSOCK_PATH(sock_path, portNumber, unixSocketName);
- if (strlen(sock_path) >= UNIXSOCK_PATH_BUFLEN)
- {
- ereport(LOG,
- (errmsg("Unix-domain socket path \"%s\" is too long (maximum %d bytes)",
- sock_path,
- (int) (UNIXSOCK_PATH_BUFLEN - 1))));
- return STATUS_ERROR;
- }
-
/*
* Grab an interlock file associated with the socket file.
*
@@ -512,13 +531,23 @@ Lock_AF_UNIX(unsigned short portNumber, char *unixSocketName)
* more portable, and second, it lets us remove any pre-existing socket
* file without race conditions.
*/
- CreateSocketLockFile(sock_path, true);
+ CreateSocketLockFile(unixSocketPath, true, unixSocketDir);
/*
* Once we have the interlock, we can safely delete any pre-existing
* socket file to avoid failure at bind() time.
*/
- unlink(sock_path);
+ unlink(unixSocketPath);
+
+ /*
+ * Arrange to unlink the socket file(s) at proc_exit. If this is the
+ * first one, set up the on_proc_exit function to do it; then add this
+ * socket file to the list of files to unlink.
+ */
+ if (sock_paths == NIL)
+ on_proc_exit(StreamDoUnlink, 0);
+
+ sock_paths = lappend(sock_paths, pstrdup(unixSocketPath));
return STATUS_OK;
}
@@ -528,11 +557,8 @@ Lock_AF_UNIX(unsigned short portNumber, char *unixSocketName)
* Setup_AF_UNIX -- configure unix socket permissions
*/
static int
-Setup_AF_UNIX(void)
+Setup_AF_UNIX(char *sock_path)
{
- /* Arrange to unlink the socket file at exit */
- on_proc_exit(StreamDoUnlink, 0);
-
/*
* Fix socket ownership/permission if requested. Note we must do this
* before we listen() to avoid a window where unwanted connections could
@@ -714,20 +740,24 @@ StreamClose(pgsocket sock)
}
/*
- * TouchSocketFile -- mark socket file as recently accessed
+ * TouchSocketFiles -- mark socket files as recently accessed
*
* This routine should be called every so often to ensure that the socket
- * file has a recent mod date (ordinary operations on sockets usually won't
- * change the mod date). That saves it from being removed by
+ * files have a recent mod date (ordinary operations on sockets usually won't
+ * change the mod date). That saves them from being removed by
* overenthusiastic /tmp-directory-cleaner daemons. (Another reason we should
* never have put the socket file in /tmp...)
*/
void
-TouchSocketFile(void)
+TouchSocketFiles(void)
{
- /* Do nothing if we did not create a socket... */
- if (sock_path[0] != '\0')
+ ListCell *l;
+
+ /* Loop through all created sockets... */
+ foreach(l, sock_paths)
{
+ char *sock_path = (char *) lfirst(l);
+
/*
* utime() is POSIX standard, utimes() is a common alternative. If we
* have neither, there's no way to affect the mod or access time of
diff --git a/src/backend/postmaster/postmaster.c b/src/backend/postmaster/postmaster.c
index 07aca31..e84a18c 100644
--- a/src/backend/postmaster/postmaster.c
+++ b/src/backend/postmaster/postmaster.c
@@ -160,7 +160,9 @@ static Backend *ShmemBackendArray;
/* The socket number we are listening for connections on */
int PostPortNumber;
-char *UnixSocketDir;
+/* The directory names for Unix socket(s) */
+char *Unix_socket_directories;
+/* The TCP listen address(es) */
char *ListenAddresses;
/*
@@ -636,7 +638,7 @@ PostmasterMain(int argc, char *argv[])
break;
case 'k':
- SetConfigOption("unix_socket_directory", optarg, PGC_POSTMASTER, PGC_S_ARGV);
+ SetConfigOption("unix_socket_directories", optarg, PGC_POSTMASTER, PGC_S_ARGV);
break;
case 'l':
@@ -880,7 +882,7 @@ PostmasterMain(int argc, char *argv[])
/* Need a modifiable copy of ListenAddresses */
rawstring = pstrdup(ListenAddresses);
- /* Parse string into list of identifiers */
+ /* Parse string into list of hostnames */
if (!SplitIdentifierString(rawstring, ',', &elemlist))
{
/* syntax error in list */
@@ -896,12 +898,12 @@ PostmasterMain(int argc, char *argv[])
if (strcmp(curhost, "*") == 0)
status = StreamServerPort(AF_UNSPEC, NULL,
(unsigned short) PostPortNumber,
- UnixSocketDir,
+ NULL,
ListenSocket, MAXLISTEN);
else
status = StreamServerPort(AF_UNSPEC, curhost,
(unsigned short) PostPortNumber,
- UnixSocketDir,
+ NULL,
ListenSocket, MAXLISTEN);
if (status == STATUS_OK)
@@ -920,7 +922,7 @@ PostmasterMain(int argc, char *argv[])
curhost)));
}
- if (!success && list_length(elemlist))
+ if (!success && elemlist != NIL)
ereport(FATAL,
(errmsg("could not create any TCP/IP sockets")));
@@ -967,13 +969,54 @@ PostmasterMain(int argc, char *argv[])
#endif
#ifdef HAVE_UNIX_SOCKETS
- status = StreamServerPort(AF_UNIX, NULL,
- (unsigned short) PostPortNumber,
- UnixSocketDir,
- ListenSocket, MAXLISTEN);
- if (status != STATUS_OK)
- ereport(WARNING,
- (errmsg("could not create Unix-domain socket")));
+ if (Unix_socket_directories)
+ {
+ char *rawstring;
+ List *elemlist;
+ ListCell *l;
+ int success = 0;
+
+ /* Need a modifiable copy of Unix_socket_directories */
+ rawstring = pstrdup(Unix_socket_directories);
+
+ /* Parse string into list of directories */
+ if (!SplitDirectoriesString(rawstring, ',', &elemlist))
+ {
+ /* syntax error in list */
+ ereport(FATAL,
+ (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ errmsg("invalid list syntax for \"unix_socket_directories\"")));
+ }
+
+ foreach(l, elemlist)
+ {
+ char *socketdir = (char *) lfirst(l);
+
+ status = StreamServerPort(AF_UNIX, NULL,
+ (unsigned short) PostPortNumber,
+ socketdir,
+ ListenSocket, MAXLISTEN);
+
+ if (status == STATUS_OK)
+ {
+ success++;
+ /* record the first successful Unix socket in lockfile */
+ if (success == 1)
+ AddToDataDirLockFile(LOCK_FILE_LINE_SOCKET_DIR, socketdir);
+ }
+ else
+ ereport(WARNING,
+ (errmsg("could not create Unix-domain socket in directory \"%s\"",
+ socketdir)));
+ }
+
+ if (!success && elemlist != NIL)
+ ereport(FATAL,
+ (errmsg("could not create any Unix-domain sockets")));
+
+ list_free_deep(elemlist);
+ pfree(rawstring);
+ }
#endif
/*
@@ -1561,14 +1604,14 @@ ServerLoop(void)
}
/*
- * Touch Unix socket and lock file every 58 minutes, to ensure that
+ * Touch Unix socket and lock files every 58 minutes, to ensure that
* they are not removed by overzealous /tmp-cleaning tasks. We assume
* no one runs cleaners with cutoff times of less than an hour ...
*/
if (now - last_touch_time >= 58 * SECS_PER_MINUTE)
{
- TouchSocketFile();
- TouchSocketLockFile();
+ TouchSocketFiles();
+ TouchSocketLockFiles();
last_touch_time = now;
}
}
diff --git a/src/backend/tcop/postgres.c b/src/backend/tcop/postgres.c
index 39017ff..318ac38 100644
--- a/src/backend/tcop/postgres.c
+++ b/src/backend/tcop/postgres.c
@@ -3393,7 +3393,7 @@ process_postgres_switches(int argc, char *argv[], GucContext ctx,
break;
case 'k':
- SetConfigOption("unix_socket_directory", optarg, ctx, gucsource);
+ SetConfigOption("unix_socket_directories", optarg, ctx, gucsource);
break;
case 'l':
diff --git a/src/backend/utils/adt/varlena.c b/src/backend/utils/adt/varlena.c
index d4abfe3..e8217ac 100644
--- a/src/backend/utils/adt/varlena.c
+++ b/src/backend/utils/adt/varlena.c
@@ -2446,6 +2446,119 @@ SplitIdentifierString(char *rawstring, char separator,
}
+/*
+ * SplitDirectoriesString --- parse a string containing directory names
+ *
+ * This is similar to SplitIdentifierString, except that the parsing
+ * rules are meant to handle pathnames instead of identifiers: there is
+ * no downcasing, embedded spaces are allowed, the max length is MAXPGPATH-1,
+ * and we apply canonicalize_path() to each extracted string. Because of the
+ * last, the returned strings are separately palloc'd rather than being
+ * pointers into rawstring --- but we still scribble on rawstring.
+ *
+ * Inputs:
+ * rawstring: the input string; must be modifiable!
+ * separator: the separator punctuation expected between directories
+ * (typically ',' or ';'). Whitespace may also appear around
+ * directories.
+ * Outputs:
+ * namelist: filled with a palloc'd list of directory names.
+ * Caller should list_free_deep() this even on error return.
+ *
+ * Returns TRUE if okay, FALSE if there is a syntax error in the string.
+ *
+ * Note that an empty string is considered okay here.
+ */
+bool
+SplitDirectoriesString(char *rawstring, char separator,
+ List **namelist)
+{
+ char *nextp = rawstring;
+ bool done = false;
+
+ *namelist = NIL;
+
+ while (isspace((unsigned char) *nextp))
+ nextp++; /* skip leading whitespace */
+
+ if (*nextp == '\0')
+ return true; /* allow empty string */
+
+ /* At the top of the loop, we are at start of a new directory. */
+ do
+ {
+ char *curname;
+ char *endp;
+
+ if (*nextp == '\"')
+ {
+ /* Quoted name --- collapse quote-quote pairs */
+ curname = nextp + 1;
+ for (;;)
+ {
+ endp = strchr(nextp + 1, '\"');
+ if (endp == NULL)
+ return false; /* mismatched quotes */
+ if (endp[1] != '\"')
+ break; /* found end of quoted name */
+ /* Collapse adjacent quotes into one quote, and look again */
+ memmove(endp, endp + 1, strlen(endp));
+ nextp = endp;
+ }
+ /* endp now points at the terminating quote */
+ nextp = endp + 1;
+ }
+ else
+ {
+ /* Unquoted name --- extends to separator or end of string */
+ curname = endp = nextp;
+ while (*nextp && *nextp != separator)
+ {
+ /* trailing whitespace should not be included in name */
+ if (!isspace((unsigned char) *nextp))
+ endp = nextp + 1;
+ nextp++;
+ }
+ if (curname == endp)
+ return false; /* empty unquoted name not allowed */
+ }
+
+ while (isspace((unsigned char) *nextp))
+ nextp++; /* skip trailing whitespace */
+
+ if (*nextp == separator)
+ {
+ nextp++;
+ while (isspace((unsigned char) *nextp))
+ nextp++; /* skip leading whitespace for next */
+ /* we expect another name, so done remains false */
+ }
+ else if (*nextp == '\0')
+ done = true;
+ else
+ return false; /* invalid syntax */
+
+ /* Now safe to overwrite separator with a null */
+ *endp = '\0';
+
+ /* Truncate path if it's overlength */
+ if (strlen(curname) >= MAXPGPATH)
+ curname[MAXPGPATH - 1] = '\0';
+
+ /*
+ * Finished isolating current name --- add it to list
+ */
+ curname = pstrdup(curname);
+ canonicalize_path(curname);
+ *namelist = lappend(*namelist, curname);
+
+ /* Loop back if we didn't reach end of string */
+ } while (!done);
+
+ return true;
+}
+
+
/*****************************************************************************
* Comparison Functions used for bytea
*
diff --git a/src/backend/utils/init/miscinit.c b/src/backend/utils/init/miscinit.c
index f994af6..db5303c 100644
--- a/src/backend/utils/init/miscinit.c
+++ b/src/backend/utils/init/miscinit.c
@@ -49,8 +49,8 @@
ProcessingMode Mode = InitProcessing;
-/* Note: we rely on this to initialize as zeroes */
-static char socketLockFile[MAXPGPATH];
+/* List of lock files to be removed at proc exit */
+static List *lock_files = NIL;
/* ----------------------------------------------------------------
@@ -640,32 +640,35 @@ GetUserNameFromId(Oid roleid)
*/
/*
- * proc_exit callback to remove a lockfile.
+ * proc_exit callback to remove lockfiles.
*/
static void
-UnlinkLockFile(int status, Datum filename)
+UnlinkLockFiles(int status, Datum arg)
{
- char *fname = (char *) DatumGetPointer(filename);
+ ListCell *l;
- if (fname != NULL)
+ foreach(l, lock_files)
{
- if (unlink(fname) != 0)
- {
- /* Should we complain if the unlink fails? */
- }
- free(fname);
+ char *curfile = (char *) lfirst(l);
+
+ unlink(curfile);
+ /* Should we complain if the unlink fails? */
}
+ /* Since we're about to exit, no need to reclaim storage */
+ lock_files = NIL;
}
/*
* Create a lockfile.
*
- * filename is the name of the lockfile to create.
+ * filename is the path name of the lockfile to create.
* amPostmaster is used to determine how to encode the output PID.
+ * socketDir is the Unix socket directory path to include (possibly empty).
* isDDLock and refName are used to determine what error message to produce.
*/
static void
CreateLockFile(const char *filename, bool amPostmaster,
+ const char *socketDir,
bool isDDLock, const char *refName)
{
int fd;
@@ -891,12 +894,7 @@ CreateLockFile(const char *filename, bool amPostmaster,
DataDir,
(long) MyStartTime,
PostPortNumber,
-#ifdef HAVE_UNIX_SOCKETS
- (*UnixSocketDir != '\0') ? UnixSocketDir : DEFAULT_PGSOCKET_DIR
-#else
- ""
-#endif
- );
+ socketDir);
/*
* In a standalone backend, the next line (LOCK_FILE_LINE_LISTEN_ADDR)
@@ -941,9 +939,14 @@ CreateLockFile(const char *filename, bool amPostmaster,
}
/*
- * Arrange for automatic removal of lockfile at proc_exit.
+ * Arrange to unlink the lock file(s) at proc_exit. If this is the
+ * first one, set up the on_proc_exit function to do it; then add this
+ * lock file to the list of files to unlink.
*/
- on_proc_exit(UnlinkLockFile, PointerGetDatum(strdup(filename)));
+ if (lock_files == NIL)
+ on_proc_exit(UnlinkLockFiles, 0);
+
+ lock_files = lappend(lock_files, pstrdup(filename));
}
/*
@@ -952,41 +955,50 @@ CreateLockFile(const char *filename, bool amPostmaster,
* When this is called, we must have already switched the working
* directory to DataDir, so we can just use a relative path. This
* helps ensure that we are locking the directory we should be.
+ *
+ * Note that the socket directory path line is initially written as empty.
+ * postmaster.c will rewrite it upon creating the first Unix socket.
*/
void
CreateDataDirLockFile(bool amPostmaster)
{
- CreateLockFile(DIRECTORY_LOCK_FILE, amPostmaster, true, DataDir);
+ CreateLockFile(DIRECTORY_LOCK_FILE, amPostmaster, "", true, DataDir);
}
/*
* Create a lockfile for the specified Unix socket file.
*/
void
-CreateSocketLockFile(const char *socketfile, bool amPostmaster)
+CreateSocketLockFile(const char *socketfile, bool amPostmaster,
+ const char *socketDir)
{
char lockfile[MAXPGPATH];
snprintf(lockfile, sizeof(lockfile), "%s.lock", socketfile);
- CreateLockFile(lockfile, amPostmaster, false, socketfile);
- /* Save name of lockfile for TouchSocketLockFile */
- strcpy(socketLockFile, lockfile);
+ CreateLockFile(lockfile, amPostmaster, socketDir, false, socketfile);
}
/*
- * TouchSocketLockFile -- mark socket lock file as recently accessed
+ * TouchSocketLockFiles -- mark socket lock files as recently accessed
*
- * This routine should be called every so often to ensure that the lock file
- * has a recent mod or access date. That saves it
+ * This routine should be called every so often to ensure that the socket
+ * lock files have a recent mod or access date. That saves them
* from being removed by overenthusiastic /tmp-directory-cleaner daemons.
* (Another reason we should never have put the socket file in /tmp...)
*/
void
-TouchSocketLockFile(void)
+TouchSocketLockFiles(void)
{
- /* Do nothing if we did not create a socket... */
- if (socketLockFile[0] != '\0')
+ ListCell *l;
+
+ foreach(l, lock_files)
{
+ char *socketLockFile = (char *) lfirst(l);
+
+ /* No need to touch the data directory lock file, we trust */
+ if (strcmp(socketLockFile, DIRECTORY_LOCK_FILE) == 0)
+ continue;
+
/*
* utime() is POSIX standard, utimes() is a common alternative; if we
* have neither, fall back to actually reading the file (which only
@@ -1018,8 +1030,10 @@ TouchSocketLockFile(void)
* Add (or replace) a line in the data directory lock file.
* The given string should not include a trailing newline.
*
- * Caution: this erases all following lines. In current usage that is OK
- * because lines are added in order. We could improve it if needed.
+ * Note: because we don't truncate the file, if we were to rewrite a line
+ * with less data than it had before, there would be garbage after the last
+ * line. We don't ever actually do that, so not worth adding another kernel
+ * call to cover the possibility.
*/
void
AddToDataDirLockFile(int target_line, const char *str)
@@ -1027,8 +1041,10 @@ AddToDataDirLockFile(int target_line, const char *str)
int fd;
int len;
int lineno;
- char *ptr;
- char buffer[BLCKSZ];
+ char *srcptr;
+ char *destptr;
+ char srcbuffer[BLCKSZ];
+ char destbuffer[BLCKSZ];
fd = open(DIRECTORY_LOCK_FILE, O_RDWR | PG_BINARY, 0);
if (fd < 0)
@@ -1039,7 +1055,7 @@ AddToDataDirLockFile(int target_line, const char *str)
DIRECTORY_LOCK_FILE)));
return;
}
- len = read(fd, buffer, sizeof(buffer) - 1);
+ len = read(fd, srcbuffer, sizeof(srcbuffer) - 1);
if (len < 0)
{
ereport(LOG,
@@ -1049,37 +1065,51 @@ AddToDataDirLockFile(int target_line, const char *str)
close(fd);
return;
}
- buffer[len] = '\0';
+ srcbuffer[len] = '\0';
/*
- * Skip over lines we are not supposed to rewrite.
+ * Advance over lines we are not supposed to rewrite, then copy them
+ * to destbuffer.
*/
- ptr = buffer;
+ srcptr = srcbuffer;
for (lineno = 1; lineno < target_line; lineno++)
{
- if ((ptr = strchr(ptr, '\n')) == NULL)
+ if ((srcptr = strchr(srcptr, '\n')) == NULL)
{
elog(LOG, "incomplete data in \"%s\": found only %d newlines while trying to add line %d",
DIRECTORY_LOCK_FILE, lineno - 1, target_line);
close(fd);
return;
}
- ptr++;
+ srcptr++;
}
+ memcpy(destbuffer, srcbuffer, srcptr - srcbuffer);
+ destptr = destbuffer + (srcptr - srcbuffer);
/*
* Write or rewrite the target line.
*/
- snprintf(ptr, buffer + sizeof(buffer) - ptr, "%s\n", str);
+ snprintf(destptr, destbuffer + sizeof(destbuffer) - destptr, "%s\n", str);
+ destptr += strlen(destptr);
+
+ /*
+ * If there are more lines in the old file, append them to destbuffer.
+ */
+ if ((srcptr = strchr(srcptr, '\n')) != NULL)
+ {
+ srcptr++;
+ snprintf(destptr, destbuffer + sizeof(destbuffer) - destptr, "%s",
+ srcptr);
+ }
/*
* And rewrite the data. Since we write in a single kernel call, this
* update should appear atomic to onlookers.
*/
- len = strlen(buffer);
+ len = strlen(destbuffer);
errno = 0;
if (lseek(fd, (off_t) 0, SEEK_SET) != 0 ||
- (int) write(fd, buffer, len) != len)
+ (int) write(fd, destbuffer, len) != len)
{
/* if write didn't set errno, assume problem is no disk space */
if (errno == 0)
diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index e5ee0f8..1428cb6 100644
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -2894,14 +2894,18 @@ static struct config_string ConfigureNamesString[] =
},
{
- {"unix_socket_directory", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
- gettext_noop("Sets the directory where the Unix-domain socket will be created."),
+ {"unix_socket_directories", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
+ gettext_noop("Sets the directories where Unix-domain sockets will be created."),
NULL,
GUC_SUPERUSER_ONLY
},
- &UnixSocketDir,
+ &Unix_socket_directories,
+#ifdef HAVE_UNIX_SOCKETS
+ DEFAULT_PGSOCKET_DIR,
+#else
"",
- check_canonical_path, NULL, NULL
+#endif
+ NULL, NULL, NULL
},
{
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index 013a91a..c0ab61c 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -67,7 +67,8 @@
# Note: Increasing max_connections costs ~400 bytes of shared memory per
# connection slot, plus lock space (see max_locks_per_transaction).
#superuser_reserved_connections = 3 # (change requires restart)
-#unix_socket_directory = '' # (change requires restart)
+#unix_socket_directories = '/tmp' # comma-separated list of directories
+ # (change requires restart)
#unix_socket_group = '' # (change requires restart)
#unix_socket_permissions = 0777 # begin with 0 to use octal notation
# (change requires restart)
diff --git a/src/bin/initdb/initdb.c b/src/bin/initdb/initdb.c
index 23fa468..452ac0b 100644
--- a/src/bin/initdb/initdb.c
+++ b/src/bin/initdb/initdb.c
@@ -991,7 +991,7 @@ static void
setup_config(void)
{
char **conflines;
- char repltok[TZ_STRLEN_MAX + 100];
+ char repltok[MAXPGPATH];
char path[MAXPGPATH];
const char *default_timezone;
@@ -1013,6 +1013,15 @@ setup_config(void)
n_buffers * (BLCKSZ / 1024));
conflines = replace_token(conflines, "#shared_buffers = 32MB", repltok);
+#ifdef HAVE_UNIX_SOCKETS
+ snprintf(repltok, sizeof(repltok), "#unix_socket_directories = '%s'",
+ DEFAULT_PGSOCKET_DIR);
+#else
+ snprintf(repltok, sizeof(repltok), "#unix_socket_directories = ''");
+#endif
+ conflines = replace_token(conflines, "#unix_socket_directories = '/tmp'",
+ repltok);
+
#if DEF_PGPORT != 5432
snprintf(repltok, sizeof(repltok), "#port = %d", DEF_PGPORT);
conflines = replace_token(conflines, "#port = 5432", repltok);
diff --git a/src/bin/pg_ctl/pg_ctl.c b/src/bin/pg_ctl/pg_ctl.c
index 66ef6bd..b815ef2 100644
--- a/src/bin/pg_ctl/pg_ctl.c
+++ b/src/bin/pg_ctl/pg_ctl.c
@@ -561,7 +561,7 @@ test_postmaster_connection(bool do_checkpoint)
hostaddr = optlines[LOCK_FILE_LINE_LISTEN_ADDR - 1];
/*
- * While unix_socket_directory can accept relative
+ * While unix_socket_directories can accept relative
* directories, libpq's host parameter must have a
* leading slash to indicate a socket directory. So,
* ignore sockdir if it's relative, and try to use TCP
diff --git a/src/include/libpq/libpq.h b/src/include/libpq/libpq.h
index 6dd91ba..2bfec2b 100644
--- a/src/include/libpq/libpq.h
+++ b/src/include/libpq/libpq.h
@@ -44,12 +44,12 @@ typedef struct
/*
* prototypes for functions in pqcomm.c
*/
-extern int StreamServerPort(int family, char *hostName,
- unsigned short portNumber, char *unixSocketName, pgsocket ListenSocket[],
- int MaxListen);
+extern int StreamServerPort(int family, char *hostName,
+ unsigned short portNumber, char *unixSocketDir,
+ pgsocket ListenSocket[], int MaxListen);
extern int StreamConnection(pgsocket server_fd, Port *port);
extern void StreamClose(pgsocket sock);
-extern void TouchSocketFile(void);
+extern void TouchSocketFiles(void);
extern void pq_init(void);
extern void pq_comm_reset(void);
extern int pq_getbytes(char *s, size_t len);
diff --git a/src/include/miscadmin.h b/src/include/miscadmin.h
index 1051ca4..e6c663c 100644
--- a/src/include/miscadmin.h
+++ b/src/include/miscadmin.h
@@ -424,7 +424,7 @@ extern char *local_preload_libraries_string;
* 2 data directory path
* 3 postmaster start timestamp (time_t representation)
* 4 port number
- * 5 socket directory path (empty on Windows)
+ * 5 first Unix socket directory path (empty if none)
* 6 first listen_address (IP address or "*"; empty if no TCP port)
* 7 shared memory key (not present on Windows)
*
@@ -443,8 +443,9 @@ extern char *local_preload_libraries_string;
#define LOCK_FILE_LINE_SHMEM_KEY 7
extern void CreateDataDirLockFile(bool amPostmaster);
-extern void CreateSocketLockFile(const char *socketfile, bool amPostmaster);
-extern void TouchSocketLockFile(void);
+extern void CreateSocketLockFile(const char *socketfile, bool amPostmaster,
+ const char *socketDir);
+extern void TouchSocketLockFiles(void);
extern void AddToDataDirLockFile(int target_line, const char *str);
extern bool RecheckDataDirLockFile(void);
extern void ValidatePgVersion(const char *path);
diff --git a/src/include/postmaster/postmaster.h b/src/include/postmaster/postmaster.h
index 683ce3c..080a8ca 100644
--- a/src/include/postmaster/postmaster.h
+++ b/src/include/postmaster/postmaster.h
@@ -19,7 +19,7 @@ extern int ReservedBackends;
extern int PostPortNumber;
extern int Unix_socket_permissions;
extern char *Unix_socket_group;
-extern char *UnixSocketDir;
+extern char *Unix_socket_directories;
extern char *ListenAddresses;
extern bool ClientAuthInProgress;
extern int PreAuthDelay;
diff --git a/src/include/utils/builtins.h b/src/include/utils/builtins.h
index 4bf07e4..c830243 100644
--- a/src/include/utils/builtins.h
+++ b/src/include/utils/builtins.h
@@ -754,6 +754,8 @@ extern int varstr_cmp(char *arg1, int len1, char *arg2, int len2, Oid collid);
extern List *textToQualifiedNameList(text *textval);
extern bool SplitIdentifierString(char *rawstring, char separator,
List **namelist);
+extern bool SplitDirectoriesString(char *rawstring, char separator,
+ List **namelist);
extern Datum replace_text(PG_FUNCTION_ARGS);
extern text *replace_text_regexp(text *src_text, void *regexp,
text *replace_text, bool glob);
diff --git a/doc/src/sgml/html-stamp b/doc/src/sgml/html-stamp
index e69de29..fcf9276 100644
--- a/doc/src/sgml/html-stamp
+++ b/doc/src/sgml/html-stamp
@@ -0,0 +1 @@
+hack
diff --git a/doc/src/sgml/man-stamp b/doc/src/sgml/man-stamp
index e69de29..fcf9276 100644
--- a/doc/src/sgml/man-stamp
+++ b/doc/src/sgml/man-stamp
@@ -0,0 +1 @@
+hack
|