Subject: bug#62497: maybe date -f <directory> should generate an error

From: Pádraig Brady <[email-masked]>
Date: Tue, 28 Mar 2023 13:42:38 +0100

On 28/03/2023 09:54, Paul Eggert wrote:
> Thanks for reporting that. I installed the attached to fix it.

Looks good thanks.
Also worth the attached test and NEWS,
which I've pushed.

cheers,
Pádraig

From a4525de1ef593cb3873eb88caa7279eb32669bda Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C3=A1draig=20Brady?= <[email-masked]>
Date: Tue, 28 Mar 2023 13:38:52 +0100
Subject: [PATCH] tests: add a test case for the previous date fix

* NEWS: Also mention this bug fix.
* tests/misc/date-f.sh: Add a new test.
* tests/local.mk: Reference the new test.
---
 NEWS                 |  4 ++++
 tests/local.mk       |  1 +
 tests/misc/date-f.sh | 29 +++++++++++++++++++++++++++++
 3 files changed, 34 insertions(+)
 create mode 100755 tests/misc/date-f.sh

diff --git a/NEWS b/NEWS
index 3b0524c22..8f602325c 100644
--- a/NEWS
+++ b/NEWS
@@ -10,6 +10,10 @@ GNU coreutils NEWS                                    -*- outline -*-
   more restricted systems like android or containers etc.
   [bug introduced in coreutils-9.2]
 
+  date --file will now diagnose a failure to read the file.
+  Previously it would have silently ignored the failure.
+  [This bug was present in "the beginning".]
+
   md5sum --check again correctly prints the status of each file checked.
   Previously the status for files was printed as 'OK' once any file had passed.
   This also applies to cksum, sha*sum, and b2sum.
diff --git a/tests/local.mk b/tests/local.mk
index 1e93290d0..c958c138c 100644
--- a/tests/local.mk
+++ b/tests/local.mk
@@ -302,6 +302,7 @@ all_tests =					\
   tests/misc/csplit-io-err.sh			\
   tests/misc/csplit-suppress-matched.pl		\
   tests/misc/date-debug.sh			\
+  tests/misc/date-f.sh				\
   tests/misc/date-sec.sh			\
   tests/misc/date-tz.sh				\
   tests/misc/dircolors.pl			\
diff --git a/tests/misc/date-f.sh b/tests/misc/date-f.sh
new file mode 100755
index 000000000..ebbb95652
--- /dev/null
+++ b/tests/misc/date-f.sh
@@ -0,0 +1,29 @@
+#!/bin/sh
+# Verify -f processing
+
+# Copyright (C) 2023 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ date
+
+# Make sure date fails when it can't read input
+# (the current directory in this case)
+if ! cat . >/dev/null; then
+  # can't read() directories
+  returns_ 1 date -f . || fail=1
+fi
+
+Exit $fail
-- 
2.26.2