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.  Close file descriptors before
  50 # invoking ulimit, to work around a bug (or a "feature") in some shells,
  51 # where they squirrel away dups of file descriptors into FD 10 and up
  52 # before closing the originals.
  53 ( (exec 3<&- 4<&- 5<&- 6<&- 7<&- 8<&- 9<&- &&
  54    ulimit -n 100 &&
  55    tar -cf archive1.tar a &&
  56    tar -xf archive1.tar -C dest1 a
  57   ) &&
  58   diff -r a dest1/a
  59 ) >/dev/null 2>&1 ||
  60    AT_SKIP_TEST
  61
  62 # Another test that "ulimit" itself works:
  63 # tar should fail when completely starved of file descriptors.
  64 ( (exec 3<&- 4<&- 5<&- 6<&- 7<&- 8<&- 9<&- &&
  65    ulimit -n 4 &&
  66    tar -cf archive2.tar a &&
  67    tar -xf archive2.tar -C dest2 a
  68   ) &&
  69   diff -r a dest2/a
  70 ) >/dev/null 2>&1 &&
  71    AT_SKIP_TEST
  72
  73 # Tar should work when there are few, but enough, file descriptors.
  74 ( (exec 3<&- 4<&- 5<&- 6<&- 7<&- 8<&- 9<&- &&
  75    ulimit -n 10 &&
  76    tar -cf archive3.tar a &&
  77    tar -xf archive3.tar -C dest3 a
  78   ) &&
  79   diff -r a dest3/a >/dev/null 2>&1
  80 ) || { diff -r a dest3/a; exit 1; }
  81 ],
  82 [0],[],[],[],[],[gnu])
  83
  84 AT_CLEANUP