From e8dd19c1f78dde9dd6b2614557487c2761fd2ec9 Mon Sep 17 00:00:00 2001
From: Tiago Cunha <tcunha@gmx.com>
Date: Sun, 13 May 2012 22:52:23 +0100
Subject: [PATCH] Warn the user if format is too long.

---
 spectrwm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/spectrwm.c b/spectrwm.c
index 082d04e..abf3d20 100644
--- a/spectrwm.c
+++ b/spectrwm.c
@@ -1575,7 +1575,8 @@ bar_fmt_expand(char *fmtexp, size_t sz)
 	strlcpy(fmtexp, fmt, sz);
 	/* finally pass the string through strftime(3) */
 #ifndef SWM_DENY_CLOCK_FORMAT
-	len = strftime(fmtexp, sz, fmt, &tm);
+	if ((len = strftime(fmtexp, sz, fmt, &tm)) == 0)
+		warnx("format too long");
 	fmtexp[len] = '\0';
 #endif
 }
-- 
2.39.2