lslogins: check errno after strto..()

Addresses: https://github.com/karelzak/util-linux/issues/1356 Signed-off-by: Karel Zak <kzak@redhat.com>
2021-06-21 15:31:43 +02:00 · 2021-06-21 15:31:43 +02:00 · 21ef212a58
parent b2db509d13
commit 21ef212a58
1 changed files with 5 additions and 2 deletions
--- a/login-utils/lslogins.c
+++ b/login-utils/lslogins.c
@ -908,11 +908,14 @@ static struct lslogins_user *get_user_info(struct lslogins_control *ctl, const c

 static int str_to_uint(char *s, unsigned int *ul)
 {
-	char *end;
+	char *end = NULL;
+
 	if (!s || !*s)
 		return -1;
+
+	errno = 0;
 	*ul = strtoul(s, &end, 0);
-	if (!*end)
+	if (errno == 0 && end && !*end)
 		return 0;
 	return 1;
 }