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Use printf's %m format instead of strerror(errno) in more places

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Most callers of strerror() are removed from the backend code.  The
remaining callers require special handling with a saved errno from a
previous system call.  The frontend code still needs strerror() where
error states need to be handled outside of fprintf.

Note that pg_regress is not changed to use %m as the TAP output may
clobber errno, since those functions call fprintf() and friends before
evaluating the format string.

Support for %m in src/port/snprintf.c has been added in d6c55de1f99a,
hence all the stable branches currently supported include it.

Author: Dagfinn Ilmari Mannsåker
Discussion: https://postgr.es/m/87sf13jhuw.fsf@wibble.ilmari.org
This commit is contained in:
Michael Paquier
2024-03-12 10:02:54 +09:00
parent 3045324214
commit 2c8118ee5d
24 changed files with 158 additions and 192 deletions
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4
src/common/psprintf.c
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@ -115,8 +115,8 @@ pvsnprintf(char *buf, size_t len, const char *fmt, va_list args)
#ifndef FRONTEND
elog(ERROR, "vsnprintf failed: %m with format string \"%s\"", fmt);
#else
fprintf(stderr, "vsnprintf failed: %s with format string \"%s\"\n",
strerror(errno), fmt);
fprintf(stderr, "vsnprintf failed: %m with format string \"%s\"\n",
fmt);
exit(EXIT_FAILURE);
#endif
}