summaryrefslogtreecommitdiffstats
path: root/tests/mv/symlink-onto-hardlink-to-self.sh
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-05 18:46:38 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-05 18:46:38 +0000
commita06ac93dcf311dac3943cb5d96ad47625d413c2d (patch)
tree6efda5e24896e7920ccac1f97aecc73406525040 /tests/mv/symlink-onto-hardlink-to-self.sh
parentInitial commit. (diff)
downloadcoreutils-a06ac93dcf311dac3943cb5d96ad47625d413c2d.tar.xz
coreutils-a06ac93dcf311dac3943cb5d96ad47625d413c2d.zip
Adding upstream version 8.30.upstream/8.30upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/mv/symlink-onto-hardlink-to-self.sh')
-rwxr-xr-xtests/mv/symlink-onto-hardlink-to-self.sh63
1 files changed, 63 insertions, 0 deletions
diff --git a/tests/mv/symlink-onto-hardlink-to-self.sh b/tests/mv/symlink-onto-hardlink-to-self.sh
new file mode 100755
index 0000000..e17330e
--- /dev/null
+++ b/tests/mv/symlink-onto-hardlink-to-self.sh
@@ -0,0 +1,63 @@
+#!/bin/sh
+# Demonstrate that when moving a symlink onto a hardlink-to-that-symlink,
+# an error is presented. Depending on your kernel (e.g., Linux, Solaris,
+# but not NetBSD), prior to coreutils-8.16, the mv would successfully perform
+# a no-op. I.e., surprisingly, mv s1 s2 would succeed, yet fail to remove s1.
+
+# Copyright (C) 2012-2018 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/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ mv
+
+# Create a file f, and a symlink s1 to that file.
+touch f || framework_failure_
+ln -s f s2 || framework_failure_
+
+# Attempt to create a hard link to that symlink.
+# On some systems, it's not possible: they create a hard link to the referent.
+ln s2 s1 || framework_failure_
+
+# If s1 is not a symlink, skip this test.
+test -h s1 \
+ || skip_ your kernel or file system cannot create a hard link to a symlink
+
+for opt in '' --backup; do
+
+ if test "$opt" = --backup; then
+ mv $opt s1 s2 > out 2>&1 || fail=1
+ compare /dev/null out || fail=1
+
+ # Ensure that s1 is gone.
+ test -e s1 && fail=1
+
+ # With --backup, ensure that the backup file was created.
+ ref=$(readlink s2~) || fail=1
+ test "$ref" = f || fail=1
+ else
+ echo "mv: 's1' and 's2' are the same file" > exp
+ mv $opt s1 s2 2>err && fail=1
+ compare exp err || fail=1
+
+ # Ensure that s1 is still present.
+ test -e s1 || fail=1
+
+ # Without --backup, ensure there is no backup file.
+ test -e s2~ && fail=1
+ fi
+
+done
+
+Exit $fail