Add more error checks.

[coloredstderr/coloredstderr.git] / src / debug.h

diff --git a/src/debug.h b/src/debug.h
index 4a7c00bc107949f2a9ab5b7aaea3c3c1452a429e..5e5cc6d937ef55e7e73de1f62310183daa40bb8a 100644 (file)
--- a/src/debug.h
+++ b/src/debug.h
@@ -24,8 +24,10 @@ static void debug_write(int fd, int first_call, char const *format, va_list ap)
     char buffer[1024];
 
     int written = vsnprintf(buffer, sizeof(buffer), format, ap);
+    if (written < 0) {
+        return; /* shouldn't happen */
     /* Overflow. */
-    if ((size_t)written >= sizeof(buffer)) {
+    } else if ((size_t)written >= sizeof(buffer)) {
         written = sizeof(buffer) - 1;
     }