tests: mktemp: test the behavior when writing to standard output fails

* tests/mktemp/write-error.sh: New file.
* tests/local.mk (all_tests): Add the test.

diff --git a/tests/local.mk b/tests/local.mk
index 17059068be4185e39a1cd153435e66997bafd6bd..74b77f220e92a1827b61e49d41ae4264543f8df7 100644 (file)
--- a/tests/local.mk
+++ b/tests/local.mk
@@ -287,6 +287,7 @@ all_tests =                                 \
   tests/mktemp/bad-unicode.sh                  \
   tests/mktemp/mktemp-misc.sh                  \
   tests/mktemp/mktemp.pl                       \
+  tests/mktemp/write-error.sh                  \
   tests/misc/arch.sh                           \
   tests/pr/bounded-memory.sh                   \
   tests/pr/pr-tests.pl                         \

diff --git a/tests/mktemp/write-error.sh b/tests/mktemp/write-error.sh
new file mode 100755 (executable)
index 0000000..7542f89
--- /dev/null
+++ b/tests/mktemp/write-error.sh
@@ -0,0 +1,36 @@
+#!/bin/sh
+# Test the behavior of 'mktemp' when it fails to write the file name
+# to standard output.
+
+# Copyright (C) 2026 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/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ mktemp
+
+if ! test -w /dev/full || ! test -c /dev/full; then
+  skip_ '/dev/full is required'
+fi
+
+mkdir -p a/b || framework_failure_
+returns_ 1 mktemp -p a/b > /dev/full || fail=1
+returns_ 1 mktemp -p a/b -d > /dev/full || fail=1
+
+# Check that the directory is empty.
+for file in a/b/*; do
+  test -e "$file" && fail=1
+done
+
+Exit $fail