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	util.c: output function might override errno and thus affect perror() - dwm - d…
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	---
	commit fcb2476b693ca4c40ad32c7119e27bbeb856865c
	parent 8933ebcf50024f4378a78e556b1ac08091197206
	Author: Hiltjo Posthuma <[email protected]>
	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:
	M util.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);
	}