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# Process this file with autom4te to create testsuite. -*- Autotest -*-
# Test suite for GNU tar.
# Copyright 2010, 2013-2014, 2016 Free Software Foundation, Inc.
# This file is part of GNU tar.
# GNU tar 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.
# GNU tar 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 <http://www.gnu.org/licenses/>.
# written by Paul Eggert
# Check that 'tar' works even in a file-descriptor-limited environment.
AT_SETUP([scarce file descriptors])
AT_KEYWORDS([extract extrac11])
AT_TAR_CHECK([
exec </dev/null
dirs='a
a/b
a/b/c
a/b/c/d
a/b/c/d/e
a/b/c/d/e/f
a/b/c/d/e/f/g
a/b/c/d/e/f/g/h
a/b/c/d/e/f/g/h/i
a/b/c/d/e/f/g/h/i/j
a/b/c/d/e/f/g/h/i/j/k
'
files=
mkdir $dirs dest1 dest2 dest3 || exit
for dir in $dirs; do
for file in X Y Z; do
echo $file >$dir/$file || exit
files="$files $file"
done
done
# Check that "ulimit" itself works. Close file descriptors before
# invoking ulimit, to work around a bug (or a "feature") in some shells,
# where they squirrel away dups of file descriptors into FD 10 and up
# before closing the originals.
( (exec 3<&- 4<&- 5<&- 6<&- 7<&- 8<&- 9<&- &&
ulimit -n 100 &&
tar -cf archive1.tar a &&
tar -xf archive1.tar -C dest1 a
) &&
diff -r a dest1/a
) >/dev/null 2>&1 ||
AT_SKIP_TEST
# Another test that "ulimit" itself works:
# tar should fail when completely starved of file descriptors.
( (exec 3<&- 4<&- 5<&- 6<&- 7<&- 8<&- 9<&- &&
ulimit -n 4 &&
tar -cf archive2.tar a &&
tar -xf archive2.tar -C dest2 a
) &&
diff -r a dest2/a
) >/dev/null 2>&1 &&
AT_SKIP_TEST
# Tar should work when there are few, but enough, file descriptors.
( (exec 3<&- 4<&- 5<&- 6<&- 7<&- 8<&- 9<&- &&
ulimit -n 10 &&
tar -cf archive3.tar a &&
tar -xf archive3.tar -C dest3 a
) &&
diff -r a dest3/a >/dev/null 2>&1
) || { diff -r a dest3/a; exit 1; }
],
[0],[],[],[],[],[gnu])
AT_CLEANUP
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