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Fix Windows-specific race condition in syslogger. This could've been

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the cause of the "could not write to log file: Bad file descriptor"
errors reported at
http://archives.postgresql.org//pgsql-general/2008-06/msg00193.php

Backpatch to 8.3, the race condition was introduced by the CSV logging
patch.

Analysis and patch by Gurjeet Singh.
This commit is contained in:
Heikki Linnakangas
2009-03-18 08:44:49 +00:00
parent 029348cff9
commit 8e1a8fe288
1 changed files with 7 additions and 6 deletions
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13
src/backend/postmaster/syslogger.c
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@ -18,7 +18,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/postmaster/syslogger.c,v 1.49 2009/02/24 12:09:09 petere Exp $ * $PostgreSQL: pgsql/src/backend/postmaster/syslogger.c,v 1.50 2009/03/18 08:44:49 heikki Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -907,13 +907,14 @@ write_syslogger_file(const char *buffer, int count, int destination)
if (destination == LOG_DESTINATION_CSVLOG && csvlogFile == NULL) if (destination == LOG_DESTINATION_CSVLOG && csvlogFile == NULL)
open_csvlogfile(); open_csvlogfile();
logfile = destination == LOG_DESTINATION_CSVLOG ? csvlogFile : syslogFile; #ifdef WIN32
#ifndef WIN32
rc = fwrite(buffer, 1, count, logfile);
#else
EnterCriticalSection(&sysfileSection); EnterCriticalSection(&sysfileSection);
#endif
logfile = destination == LOG_DESTINATION_CSVLOG ? csvlogFile : syslogFile;
rc = fwrite(buffer, 1, count, logfile); rc = fwrite(buffer, 1, count, logfile);
#ifdef WIN32
LeaveCriticalSection(&sysfileSection); LeaveCriticalSection(&sysfileSection);
#endif #endif