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Don't pass an invalid file handle to dup2(). That causes a crash on

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Windows, thanks to a feature in CRT called Parameter Validation.

Backpatch to 8.2, which is the oldest version supported on Windows. In
8.2 and 8.3 also backpatch the earlier change to use DEVNULL instead of
NULL_DEV #define for a /dev/null-like device. NULL_DEV was hard-coded to
"/dev/null" regardless of platform, which didn't work on Windows, while
DEVNULL works on all platforms. Restarting syslogger didn't work on
Windows on versions 8.3 and below because of that.
This commit is contained in:
Heikki Linnakangas
2010-04-01 20:12:34 +00:00
parent d1bc3525c0
commit 292934de2f
3 changed files with 16 additions and 9 deletions
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4
src/backend/postmaster/postmaster.c
View File

@@ -37,7 +37,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/postmaster/postmaster.c,v 1.551.2.5 2009/12/02 17:41:31 tgl Exp $
* $PostgreSQL: pgsql/src/backend/postmaster/postmaster.c,v 1.551.2.6 2010/04/01 20:12:34 heikki Exp $
*
* NOTES
*
@@ -1174,7 +1174,7 @@ pmdaemonize(void)
ExitPostmaster(1);
}
#endif
i = open(NULL_DEV, O_RDWR, 0);
i = open(DEVNULL, O_RDWR, 0);
dup2(i, 0);
dup2(i, 1);
dup2(i, 2);

13
src/backend/postmaster/syslogger.c
View File

@@ -18,7 +18,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/postmaster/syslogger.c,v 1.44.2.2 2009/11/19 02:45:50 tgl Exp $
* $PostgreSQL: pgsql/src/backend/postmaster/syslogger.c,v 1.44.2.3 2010/04/01 20:12:34 heikki Exp $
*
*-------------------------------------------------------------------------
*/
@@ -184,7 +184,7 @@ SysLoggerMain(int argc, char *argv[])
*/
if (redirection_done)
{
int fd = open(NULL_DEV, O_WRONLY, 0);
int fd = open(DEVNULL, O_WRONLY, 0);
/*
* The closes might look redundant, but they are not: we want to be
@@ -194,9 +194,12 @@ SysLoggerMain(int argc, char *argv[])
*/
close(fileno(stdout));
close(fileno(stderr));
dup2(fd, fileno(stdout));
dup2(fd, fileno(stderr));
close(fd);
if (fd != -1)
{
dup2(fd, fileno(stdout));
dup2(fd, fileno(stderr));
close(fd);
}
}
/*