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When some program produces unexpected output, that use of compare-vs-/dev/null will ensure that the surprising output is printed in the test's output. With "test -s err" only, one would have to instrument and rerun in order to see the offending output. * cfg.mk (sc_prohibit_and_fail_1): Exempt 'compare' from this check. * tests/dd/misc.sh: Change "tests -s ... || fail=1" to "compare /dev/null ... && fail=1". * tests/misc/nice.sh: Likewise. * tests/rm/read-only.sh: Likewise. * tests/tail-2/inotify-race.sh: Likewise. * tests/touch/no-dereference.sh: Likewise. Suggested by Jim Meyering in http://lists.gnu.org/archive/html/coreutils/2015-01/msg00042.html
83 lines
2.6 KiB
Bash
Executable File
83 lines
2.6 KiB
Bash
Executable File
#!/bin/sh
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# Ensure that touch -h works.
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# Copyright (C) 2009-2015 Free Software Foundation, Inc.
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
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print_ver_ touch
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ln -s nowhere dangling || framework_failure_
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touch file || framework_failure_
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ln -s file link || framework_failure_
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# These first tests should work on every platform.
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# -h does not create files, but it warns. Use -c to silence warning.
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returns_ 1 touch -h no-file 2> err || fail=1
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compare /dev/null err && fail=1
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touch -h -c no-file 2> err || fail=1
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compare /dev/null err || fail=1
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# -h works on regular files
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touch -h file || fail=1
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# -h coupled with -r uses timestamp of the symlink, not the referent.
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touch -h -r dangling file || fail=1
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test -f nowhere && fail=1
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# The remaining tests of -h require kernel support for changing symlink times.
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grep '^#define HAVE_UTIMENSAT 1' "$CONFIG_HEADER" > /dev/null ||
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grep '^#define HAVE_LUTIMES 1' "$CONFIG_HEADER" > /dev/null ||
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skip_ 'this system lacks the utimensat function'
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# Changing time of dangling symlink is okay.
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# Skip the test if this fails, but the error text corresponds to
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# ENOSYS (possible with old kernel but new glibc).
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touch -h dangling 2> err
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case $? in
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0) test -f nowhere && fail=1
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compare /dev/null err || fail=1;;
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1) grep 'Function not implemented' err \
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&& skip_ 'this system lacks the utimensat function'
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fail=1;;
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*) fail=1;;
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esac
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# Change the mtime of a symlink.
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touch -m -h -d 2009-10-10 link || fail=1
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case $(stat --format=%y link) in
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2009-10-10*) ;;
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*) fail=1 ;;
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esac
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case $(stat --format=%y file) in
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2009-10-10*) fail=1;;
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esac
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# Test interactions with -.
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touch -h - > file || fail=1
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# If >&- works, test "touch -ch -" etc.
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# >&- apparently does not work in HP-UX 11.23.
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# This test is ineffective unless /dev/stdout also works.
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# If stdout is open, it is not a symlink.
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if env test -w /dev/stdout >/dev/null &&
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env test ! -w /dev/stdout >&-; then
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returns_ 1 touch -h - >&- || fail=1
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touch -h -c - >&- || fail=1
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fi
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Exit $fail
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