tests: csplit: check writing to /dev/full

* tests/csplit/csplit-io-err-2.sh: Add a new test.
* tests/local.mk: Reference new test.

diff --git a/tests/csplit/csplit-io-err-2.sh b/tests/csplit/csplit-io-err-2.sh
new file mode 100755 (executable)
index 0000000..358d937
--- /dev/null
+++ b/tests/csplit/csplit-io-err-2.sh
@@ -0,0 +1,39 @@
+#!/bin/sh
+# Ensure we handle i/o errors correctly in csplit via /dev/full
+
+# Copyright (C) 2025 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_ csplit
+
+cp -sf /dev/full xx01 || skip_ '/dev/full is required'
+
+# Get the wording of the OS-dependent ENOSPC message
+returns_ 1 seq 1 >/dev/full 2>msgt || framework_failure_
+sed 's/seq: write error: //' msgt > msg || framework_failure_
+
+# Create the expected error message
+{ printf "%s" "csplit: xx01: " ; cat msg ; } > exp || framework_failure_
+
+# the 'csplit' command should fail with exit code 1
+seq 2 | returns_ 1 csplit - 1 2> err || fail=1
+# csplit should cleanup broken files
+test -e xx01 && fail=1
+
+# Ensure we got the expected error message
+compare exp err || fail=1
+
+Exit $fail

diff --git a/tests/local.mk b/tests/local.mk
index 56a37c5242df5dc4ee40c9cd57a54b3edb4ef3c0..f75f8bf75a199eb63e2551bbc656139723587828 100644 (file)
--- a/tests/local.mk
+++ b/tests/local.mk
@@ -317,6 +317,7 @@ all_tests =                                 \
   tests/csplit/csplit-1000.sh                  \
   tests/csplit/csplit-heap.sh                  \
   tests/csplit/csplit-io-err.sh                        \
+  tests/csplit/csplit-io-err-2.sh                      \
   tests/csplit/csplit-suppress-matched.pl      \
   tests/date/date-debug.sh                     \
   tests/date/date-ethiopia.sh                  \