alexkarle.com

commit be213d544f46e971c1a61a0d2f49f49a134726c1 (patch)
parent a62ba1e9e86bc3882323598a57ff5296329c84da
Author: Alex Karle <alex@alexkarle.com>
Date:   Sat, 24 Apr 2021 00:41:35 -0400

kiosk: Add failure check to /dev/tty opening

ssh-ing with stdin as /dev/null didn't fail on Linux, but it segv'd on
OpenBSD. This patch adds a check that fopen on /dev/tty worked.

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

1 file changed, 3 insertions(+), 0 deletions(-)
diff --git a/src/kiosk.c b/src/kiosk.c
@@ -3,6 +3,7 @@
 #include <string.h>
 #include <stdlib.h>
 #include <limits.h>
+#include <err.h>
 
 int list(void) {
     DIR *dirp = opendir(MANDIR);
@@ -70,6 +71,8 @@ void prompt(int n) {
      * simple DDOS via < /dev/random */
 
     FILE *tty = fopen("/dev/tty", "r");
+    if (tty == NULL)
+        err(1, "unable to open tty");
     char *line = NULL;
     size_t line_len;
     ssize_t nread = getline(&line, &line_len, tty);