isync

commit e295f483d975d7e926bb5a2527aeab10c150dd4c
parent 6e56f39fa9958d93b9ea9973dadaaa477ac452b2
Author: Oswald Buddenhagen <ossi@users.sf.net>
Date:   Fri,  1 Jan 2021 14:46:31 +0100

save errno in sys_error()

the print functions prior to perror() might otherwise clobber it.

Diffstat:
M
src/util.c
 | 
3
+++

1 file changed, 3 insertions(+), 0 deletions(-)
diff --git a/src/util.c b/src/util.c
@@ -27,6 +27,7 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <fcntl.h>
+#include <errno.h>
 #include <string.h>
 #include <ctype.h>
 #include <pwd.h>
@@ -154,9 +155,11 @@ vsys_error( const char *msg, va_list va )
 {
 	char buf[1024];
 
+	int errno_bak = errno;
 	flushn();
 	if ((uint)vsnprintf( buf, sizeof(buf), msg, va ) >= sizeof(buf))
 		oob();
+	errno = errno_bak;
 	perror( buf );
 }