dwm

dynamic window manager
git clone git://git.suckless.org/dwm
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commit fcb2476b693ca4c40ad32c7119e27bbeb856865c
parent 8933ebcf50024f4378a78e556b1ac08091197206
Author: Hiltjo Posthuma <hiltjo@codemadness.org>
Date:   Sun, 27 Oct 2024 20:10:07 +0100

util.c: output function might override errno and thus affect perror()

Original patch by Raymond Cole with some modifications, thanks!

Diffstat:
Mutil.c | 13+++++++------
1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/util.c b/util.c @@ -1,4 +1,5 @@ /* See LICENSE file for copyright and license details. */ +#include <errno.h> #include <stdarg.h> #include <stdio.h> #include <stdlib.h> @@ -10,17 +11,17 @@ void die(const char *fmt, ...) { va_list ap; + int saved_errno; + + saved_errno = errno; va_start(ap, fmt); vfprintf(stderr, fmt, ap); va_end(ap); - if (fmt[0] && fmt[strlen(fmt)-1] == ':') { - fputc(' ', stderr); - perror(NULL); - } else { - fputc('\n', stderr); - } + if (fmt[0] && fmt[strlen(fmt)-1] == ':') + fprintf(stderr, " %s", strerror(saved_errno)); + fputc('\n', stderr); exit(1); }