From 71a8cdf6b1f04e95aa74a2f304d68530638d229a Mon Sep 17 00:00:00 2001
From: Bruno Haible <bruno@clisp.org>
Date: Thu, 18 Sep 2025 23:05:06 +0200
Subject: [PATCH] fmt: eliminate a clang -Wformat-extra-args warning

* src/fmt.c (fmt): When not reading from stdin, always mention the
file name in the error message.
---
 src/fmt.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/fmt.c b/src/fmt.c
index b44bbde5c7..244a8a5c92 100644
--- a/src/fmt.c
+++ b/src/fmt.c
@@ -493,12 +493,18 @@ fmt (FILE *f, char const *file)
     }
 
   int err = ferror (f) ? 0 : -1;
+  /* err < 0 means success.  */
   if (f == stdin)
     clearerr (f);
   else if (fclose (f) != 0 && err < 0)
     err = errno;
   if (0 <= err)
-    error (0, err, err ? "%s" : _("read error"), quotef (file));
+    {
+      if (f == stdin)
+        error (0, err, _("read error"));
+      else
+        error (0, err, _("error reading %s"), quoteaf (file));
+    }
   return err < 0;
 }
 
-- 
2.47.3