diff options
Diffstat (limited to 'tests/mv/atomic')
-rwxr-xr-x | tests/mv/atomic | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/tests/mv/atomic b/tests/mv/atomic new file mode 100755 index 0000000..1fa0736 --- /dev/null +++ b/tests/mv/atomic @@ -0,0 +1,69 @@ +#!/bin/sh +# ensure that mv doesn't first unlink its destination in one particular case + +# Copyright (C) 2006, 2006 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 2 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, write to the Free Software +# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +# 02110-1301, USA. + +if test "$VERBOSE" = yes; then + set -x + mv --version +fi + +pwd=`pwd` +t0=`echo "$0"|sed 's,.*/,,'`.tmp; tmp=$t0/$$ +trap 'status=$?; cd "$pwd" && chmod -R u+rwx $t0 && rm -rf $t0 && exit $status' 0 +trap '(exit $?); exit $?' 1 2 13 15 + +framework_failure=0 +mkdir -p $tmp || framework_failure=1 +cd $tmp || framework_failure=1 + +# Before the fix, mv would unnecessarily unlink the destination symlink: +# $ rm -rf s[12]; ln -s / s1; ln -s /tmp s2; strace -qe unlink /bin/mv -T s1 s2 +# unlink("s2") = 0 +# +# With the fix, it doesn't call unlink: +# $ rm -rf s[12]; ln -s / s1; ln -s /tmp s2; strace -qe unlink ./mv -T s1 s2 +# $ + +ln -s t1 s1 || framework_failure=1 +ln -s t2 s2 || framework_failure=1 + +if test $framework_failure = 1; then + echo "$0: failure in testing framework" 1>&2 + (exit 1); exit 1 +fi + +# Skip this test on systems without strace. +strace -V < /dev/null > ver 2>&1 || skip=1 +if test "$skip" = 1; then + echo "$0: no strace program, so skipping this test" 1>&2 + (exit 77); exit 77 +fi + +fail=0 + +strace -qe unlink mv -T s1 s2 > out 2>&1 || fail=1 +$EGREP 'unlink.*"s1"' out && fail=1 + +# Ensure that the source, s1, is gone. +ls -dl s1 > /dev/null 2>&1 && fail=1 + +# Ensure that the destination, s2, contains the link from s1. +test "`readlink s2`" = t1 || fail=1 + +(exit $fail); exit $fail |