X-Git-Url: https://git.xinqibao.xyz/slstatus.git/blobdiff_plain/faa52bdcc0221de2d8fae950e409a8ac5e05bfcd..a4fe8c97414f07dd8b891e0d325dd2733195151d:/util.c?ds=sidebyside

diff --git a/util.c b/util.c
index 6008ffc..6113049 100644
--- a/util.c
+++ b/util.c
@@ -10,15 +10,16 @@ const char *
 bprintf(const char *fmt, ...)
 {
 	va_list ap;
-	size_t len;
+	int ret;
 
 	va_start(ap, fmt);
-	len = vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
+	if ((ret = vsnprintf(buf, sizeof(buf), fmt, ap)) < 0) {
+		fprintf(stderr, "vsnprintf: %s\n", strerror(errno));
+	} else if ((size_t)ret >= sizeof(buf)) {
+		fprintf(stderr, "vsnprintf: Output truncated\n");
+	}
 	va_end(ap);
 
-	if (len >= sizeof(buf))
-		buf[sizeof(buf)-1] = '\0';
-
 	return buf;
 }