Check the value returned by fopen() during display initialization

[tig] / tig.c

diff --git a/tig.c b/tig.c
index 8bae0d5..6a1f3d1 100644 (file)
--- a/tig.c
+++ b/tig.c
@@ -2583,6 +2583,8 @@ init_display(void)
                /* Leave stdin and stdout alone when acting as a pager. */
                FILE *io = fopen("/dev/tty", "r+");
 
+               if (!io)
+                       die("Failed to open /dev/tty");
                cursed = !!newterm(NULL, io, io);
        }