2 # Ensure that tail -f works on an append-only file
3 # Requires root access to do chattr +a, as well as an ext[23] or xfs file system
5 # Copyright (C) 2006-2007 Free Software Foundation, Inc.
7 # This program is free software: you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation, either version 3 of the License, or
10 # (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
20 if test "$VERBOSE" = yes; then
25 PRIV_CHECK_ARG
=require-root .
$srcdir/..
/priv-check
26 .
$srcdir/..
/test-lib.sh
30 chattr +a f
2>/dev
/null || chattr_a_works
=0
31 ( echo x
> f
) 2>/dev
/null
&& chattr_a_works
=0
32 echo x
>> f || chattr_a_works
=0
34 if test $chattr_a_works = 0; then
35 echo "$0: chattr +a doesn't work on this file system; skipping this test " 1>&2
43 tail --pid=$pid -f f
> /dev
/null
2>&1 || fail
=1
44 chattr -a f
2>/dev
/null
46 (exit $fail); exit $fail