Dogcows Code - chaz/tar/blob - tests/extrac11.at

   1 # Process this file with autom4te to create testsuite. -*- Autotest -*-
   2
   3 # Test suite for GNU tar.
   4 # Copyright (C) 2010 Free Software Foundation, Inc.
   5
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 3, or (at your option)
   9 # any later version.
  10
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 # written by Paul Eggert
  20
  21 # Check that 'tar' works even in a file-descriptor-limited environment.
  22
  23 AT_SETUP([scarce file descriptors])
  24 AT_KEYWORDS([extract extrac11])
  25
  26 AT_TAR_CHECK([
  27 exec </dev/null
  28 dirs='a
  29       a/b
  30       a/b/c
  31       a/b/c/d
  32       a/b/c/d/e
  33       a/b/c/d/e/f
  34       a/b/c/d/e/f/g
  35       a/b/c/d/e/f/g/h
  36       a/b/c/d/e/f/g/h/i
  37       a/b/c/d/e/f/g/h/i/j
  38       a/b/c/d/e/f/g/h/i/j/k
  39 '
  40 files=
  41 mkdir $dirs dest1 dest2 dest3 || exit
  42 for dir in $dirs; do
  43   for file in X Y Z; do
  44     echo $file >$dir/$file || exit
  45     files="$files $file"
  46   done
  47 done
  48
  49 # Check that "ulimit" itself works.
  50 ( (ulimit -n 100 &&
  51    tar -cf archive1.tar a 3<&- 4<&- 5<&- 6<&- 7<&- 8<&- 9<&- &&
  52    tar -xf archive1.tar -C dest1 a 3<&- 4<&- 5<&- 6<&- 7<&- 8<&- 9<&-
  53   ) &&
  54   diff -r a dest1/a
  55 ) >/dev/null 2>&1 ||
  56    AT_SKIP_TEST
  57
  58 # Another test that "ulimit" itself works:
  59 # tar should fail when completely starved of file descriptors.
  60 ( (ulimit -n 4 &&
  61    tar -cf archive2.tar a 3<&- 4<&- 5<&- 6<&- 7<&- 8<&- 9<&- &&
  62    tar -xf archive2.tar -C dest2 a 3<&- 4<&- 5<&- 6<&- 7<&- 8<&- 9<&-
  63   ) &&
  64   diff -r a dest2/a
  65 ) >/dev/null 2>&1 &&
  66    AT_SKIP_TEST
  67
  68 # Tar should work when there are few, but enough, file descriptors.
  69 ( (ulimit -n 10 &&
  70    tar -cf archive3.tar a 3<&- 4<&- 5<&- 6<&- 7<&- 8<&- 9<&- &&
  71    tar -xf archive3.tar -C dest3 a 3<&- 4<&- 5<&- 6<&- 7<&- 8<&- 9<&-
  72   ) &&
  73   diff -r a dest3/a >/dev/null 2>&1
  74 ) || { diff -r a dest3/a; exit 1; }
  75 ],
  76 [0],[],[],[],[],[gnu])
  77
  78 AT_CLEANUP