wall: add fallback for failed sysconf()

Signed-off-by: Karel Zak <kzak@redhat.com>
2014-07-17 15:19:34 +02:00 · 2014-07-17 15:19:34 +02:00 · 479912e7b3
parent 86c58c4a82
commit 479912e7b3
1 changed files with 3 additions and 0 deletions
--- a/term-utils/wall.c
+++ b/term-utils/wall.c
@ -187,6 +187,9 @@ static char *makemsg(char *fname, char **mvec, int mvecsz,
 	long line_max;

 	line_max = sysconf(_SC_LINE_MAX);
+	if (line_max <= 0)
+		line_max = 512;
+
 	lbuf = xmalloc(line_max);

 	if ((fp = xfmkstemp(&tmpname, NULL)) == NULL)