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46 lines
1.3 KiB
Bash
Executable File
46 lines
1.3 KiB
Bash
Executable File
#!/bin/sh
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# Ensure that tail -f works on an append-only file
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# Requires root access to do chattr +a, as well as an ext[23] or xfs file system
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# Copyright (C) 2006-2008 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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if test "$VERBOSE" = yes; then
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set -x
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tail --version
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fi
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. $srcdir/test-lib.sh
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require_root_
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chattr_a_works=1
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touch f
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chattr +a f 2>/dev/null || chattr_a_works=0
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( echo x > f ) 2>/dev/null && chattr_a_works=0
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echo x >> f || chattr_a_works=0
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if test $chattr_a_works = 0; then
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skip_test_ "chattr +a doesn't work on this file system"
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fi
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fail=0
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sleep 1 &
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pid=$!
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tail --pid=$pid -f f > /dev/null 2>&1 || fail=1
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chattr -a f 2>/dev/null
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(exit $fail); exit $fail
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