vis-menu: check read(2) return value

Fixes CID 137371
njhanley · Feb 8, 2017 · 4f61acd · 4f61acd
1 parent e43a3f6
commit 4f61acd
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/vis-menu.c b/vis-menu.c
@@ -308,7 +308,8 @@ readstdin() {
 
 static void
 xread(int fd, void *buf, size_t nbyte) {
-	if (read(fd, buf, nbyte) < 0)
+	ssize_t r = read(fd, buf, nbyte);
+	if (r < 0 || (size_t)r != nbyte)
 		die("Can not read.");
 }