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Fix elog logic so that error messages displayed during initdb (or 

other standalone-backend situations) are not duplicated.  Remove some
dead code, add some comments, too.
This commit is contained in:
Tom Lane 2000-11-25 19:09:22 +00:00
parent fc6603ff75
commit 0432ce994d
1 changed files with 26 additions and 37 deletions
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63
src/backend/utils/error/elog.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/error/elog.c,v 1.68 2000/11/25 04:38:00 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/error/elog.c,v 1.69 2000/11/25 19:09:22 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -77,7 +77,6 @@ static const char * print_timestamp(void);
static const char * print_pid(void);
static int Debugfile = -1;
static int Err_file = -1;
static int ElogDebugIndentLevel = 0;
/*--------------------
@ -329,6 +328,7 @@ elog(int lev, const char *fmt, ...)
*/
#ifdef ENABLE_SYSLOG
/* Write to syslog, if enabled */
if (Use_syslog >= 1)
{
int syslog_level;
@ -364,31 +364,11 @@ elog(int lev, const char *fmt, ...)
len = strlen(msg_buf);
/* Write to debug file, if open and enabled */
/* NOTE: debug file is typically pointed at stderr */
if (Debugfile >= 0 && Use_syslog <= 1)
write(Debugfile, msg_buf, len);
/*
* If there's an error log file other than our channel to the
* front-end program, write to it first. This is important because
* there's a bug in the socket code on ultrix. If the front end has
* gone away (so the channel to it has been closed at the other end),
* then writing here can cause this backend to exit without warning
* that is, write() does an exit(). In this case, our only hope of
* finding out what's going on is if Err_file was set to some disk
* log. This is a major pain. (It's probably also long-dead code...
* does anyone still use ultrix?)
*/
if (lev > DEBUG && Err_file >= 0 &&
Debugfile != Err_file && Use_syslog <= 1)
{
if (write(Err_file, msg_buf, len) < 0)
{
write(open("/dev/console", O_WRONLY, 0666), msg_buf, len);
lev = REALLYFATAL;
}
fsync(Err_file);
}
#ifndef PG_STANDALONE
if (lev > DEBUG && whereToSendOutput == Remote)
@ -429,9 +409,11 @@ elog(int lev, const char *fmt, ...)
/*
* We are running as an interactive backend, so just send the
* message to stderr.
* message to stderr. But don't send a duplicate if Debugfile
* write, above, already sent to stderr.
*/
fputs(msg_buf, stderr);
if (Debugfile != fileno(stderr))
fputs(msg_buf, stderr);
}
#endif /* !PG_STANDALONE */
@ -511,11 +493,16 @@ DebugFileOpen(void)
int fd,
istty;
Err_file = Debugfile = -1;
Debugfile = -1;
ElogDebugIndentLevel = 0;
if (OutputFileName[0])
{
/*
* A debug-output file name was given.
*
* Make sure we can write the file, and find out if it's a tty.
*/
if ((fd = open(OutputFileName, O_CREAT | O_APPEND | O_WRONLY,
0666)) < 0)
elog(FATAL, "DebugFileOpen: open of %s: %m",
@ -523,21 +510,23 @@ DebugFileOpen(void)
istty = isatty(fd);
close(fd);
/*
* Redirect our stderr to the debug output file.
*/
if (!freopen(OutputFileName, "a", stderr))
elog(FATAL, "DebugFileOpen: %s reopen as stderr: %m",
OutputFileName);
Debugfile = fileno(stderr);
/*
* If the file is a tty and we're running under the postmaster,
* try to send stdout there as well (if it isn't a tty then stderr
* will block out stdout, so we may as well let stdout go wherever
* it was going before).
*/
if (istty &&
IsUnderPostmaster &&
!freopen(OutputFileName, "a", stdout))
elog(FATAL, "DebugFileOpen: %s reopen as stdout: %m",
OutputFileName);
if (!freopen(OutputFileName, "a", stderr))
elog(FATAL, "DebugFileOpen: %s reopen as stderr: %m",
OutputFileName);
Err_file = Debugfile = fileno(stderr);
if (istty && IsUnderPostmaster)
if (!freopen(OutputFileName, "a", stdout))
elog(FATAL, "DebugFileOpen: %s reopen as stdout: %m",
OutputFileName);
return Debugfile;
}
@ -555,7 +544,7 @@ DebugFileOpen(void)
if (fd < 0)
elog(FATAL, "DebugFileOpen: could not open debugging file");
Err_file = Debugfile = fd;
Debugfile = fd;
return Debugfile;
}