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Fix crash caused by log_timezone patch if we attempt to emit any elog messages

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between the setting of log_line_prefix and the setting of log_timezone.  We
can't realistically set log_timezone any earlier than we do now, so the best
behavior seems to be to use GMT zone if any timestamps are to be logged during
early startup.  Create a dummy zone variable with a minimal definition of GMT
(in particular it will never know about leap seconds), so that we can set it
up without reference to any external files.
This commit is contained in:
Tom Lane
2007-08-04 19:29:25 +00:00
parent 0b9d3d4dcd
commit 4fd8d6b3e7
5 changed files with 67 additions and 10 deletions
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23
src/backend/utils/error/elog.c
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@ -42,7 +42,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/error/elog.c,v 1.192 2007/08/04 01:26:54 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/error/elog.c,v 1.193 2007/08/04 19:29:25 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1497,16 +1497,25 @@ log_line_prefix(StringInfo buf)
{
struct timeval tv;
pg_time_t stamp_time;
pg_tz *tz;
char strfbuf[128],
msbuf[8];
gettimeofday(&tv, NULL);
stamp_time = (pg_time_t) tv.tv_sec;
/*
* Normally we print log timestamps in log_timezone, but
* during startup we could get here before that's set.
* If so, fall back to gmt_timezone (which guc.c ensures
* is set up before Log_line_prefix can become nonempty).
*/
tz = log_timezone ? log_timezone : gmt_timezone;
pg_strftime(strfbuf, sizeof(strfbuf),
/* leave room for milliseconds... */
"%Y-%m-%d %H:%M:%S %Z",
pg_localtime(&stamp_time, log_timezone));
pg_localtime(&stamp_time, tz));
/* 'paste' milliseconds into place... */
sprintf(msbuf, ".%03d", (int) (tv.tv_usec / 1000));
@ -1518,22 +1527,28 @@ log_line_prefix(StringInfo buf)
case 't':
{
pg_time_t stamp_time = (pg_time_t) time(NULL);
pg_tz *tz;
char strfbuf[128];
tz = log_timezone ? log_timezone : gmt_timezone;
pg_strftime(strfbuf, sizeof(strfbuf),
"%Y-%m-%d %H:%M:%S %Z",
pg_localtime(&stamp_time, log_timezone));
pg_localtime(&stamp_time, tz));
appendStringInfoString(buf, strfbuf);
}
break;
case 's':
{
pg_time_t stamp_time = (pg_time_t) MyStartTime;
pg_tz *tz;
char strfbuf[128];
tz = log_timezone ? log_timezone : gmt_timezone;
pg_strftime(strfbuf, sizeof(strfbuf),
"%Y-%m-%d %H:%M:%S %Z",
pg_localtime(&stamp_time, log_timezone));
pg_localtime(&stamp_time, tz));
appendStringInfoString(buf, strfbuf);
}
break;