dircolors: diagnose read errors

* NEWS: Mention the fix.
* src/dircolors.c: Fail upon read error from getline().
* tests/misc/dircolors.sh: Add a new test.
* tests/local.mk: Reference the new test.

1 files changed, 28 insertions, 0 deletions

diff --git a/tests/misc/dircolors.sh b/tests/misc/dircolors.sh
new file mode 100755
index 000000000..9e2ae2890
--- /dev/null
+++ b/tests/misc/dircolors.sh
@@ -0,0 +1,28 @@
+#!/bin/sh
+
+# 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_ dircolors
+
+# Make sure dircolors fails when it can't read input
+# (the current directory in this case)
+if ! cat . >/dev/null; then
+  # can't read() directories
+  returns_ 1 dircolors . || fail=1
+fi
+
+Exit $fail