From: Pádraig Brady <P@draigBrady.com>
Date: Tue, 13 Jan 2026 02:01:11 +0000 (+0000)
Subject: fmt: correctly diagnose read errors
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=495e3528d7c3a9e9e1fc793efecb749b40f130af;p=thirdparty%2Fcoreutils.git

fmt: correctly diagnose read errors

* src/fmt.c (fmt): Pass errno to error() so that
the particular error is diagnosed.
* NEWS: Mention the improvement.
---

diff --git a/NEWS b/NEWS
index b4031caa00..a2facb6361 100644
--- a/NEWS
+++ b/NEWS
@@ -20,6 +20,10 @@ GNU coreutils NEWS                                    -*- outline -*-
   POSIX says this is not portable.
   [bug introduced in fileutils-4.1.6]
 
+  'fmt' now correctly diagnoses read errors.
+  Previously fmt generated a generic error for any read error.
+  [bug introduced in coreutils-9.0]
+
   md5sum --text correctly translates CRLF line endings with the MSYS2 runtime.
   This also applies to the sha*sum and b2sum utilities.
   [This bug was present in "the beginning".]
diff --git a/src/fmt.c b/src/fmt.c
index ae689ec286..8928a32b46 100644
--- a/src/fmt.c
+++ b/src/fmt.c
@@ -501,9 +501,9 @@ fmt (FILE *f, char const *file)
   if (0 <= err)
     {
       if (f == stdin)
-        error (0, err, _("read error"));
+        error (0, errno, _("read error"));
       else
-        error (0, err, _("error reading %s"), quoteaf (file));
+        error (0, errno, _("error reading %s"), quoteaf (file));
     }
   return err < 0;
 }