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 2010, 2013-2014 Free Software Foundation, Inc.
   5
   6 # This file is part of GNU tar.
   7
   8 # GNU tar is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 3 of the License, or
  11 # (at your option) any later version.
  12
  13 # GNU tar is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17
  18 # You should have received a copy of the GNU General Public License
  19 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20
  21 # written by Paul Eggert
  22
  23 # Check that 'tar' works even in a file-descriptor-limited environment.
  24
  25 AT_SETUP([scarce file descriptors])
  26 AT_KEYWORDS([extract extrac11])
  27
  28 AT_TAR_CHECK([
  29 exec </dev/null
  30 dirs='a
  31       a/b
  32       a/b/c
  33       a/b/c/d
  34       a/b/c/d/e
  35       a/b/c/d/e/f
  36       a/b/c/d/e/f/g
  37       a/b/c/d/e/f/g/h
  38       a/b/c/d/e/f/g/h/i
  39       a/b/c/d/e/f/g/h/i/j
  40       a/b/c/d/e/f/g/h/i/j/k
  41 '
  42 files=
  43 mkdir $dirs dest1 dest2 dest3 || exit
  44 for dir in $dirs; do
  45   for file in X Y Z; do
  46     echo $file >$dir/$file || exit
  47     files="$files $file"
  48   done
  49 done
  50
  51 # Check that "ulimit" itself works.  Close file descriptors before
  52 # invoking ulimit, to work around a bug (or a "feature") in some shells,
  53 # where they squirrel away dups of file descriptors into FD 10 and up
  54 # before closing the originals.
  55 ( (exec 3<&- 4<&- 5<&- 6<&- 7<&- 8<&- 9<&- &&
  56    ulimit -n 100 &&
  57    tar -cf archive1.tar a &&
  58    tar -xf archive1.tar -C dest1 a
  59   ) &&
  60   diff -r a dest1/a
  61 ) >/dev/null 2>&1 ||
  62    AT_SKIP_TEST
  63
  64 # Another test that "ulimit" itself works:
  65 # tar should fail when completely starved of file descriptors.
  66 ( (exec 3<&- 4<&- 5<&- 6<&- 7<&- 8<&- 9<&- &&
  67    ulimit -n 4 &&
  68    tar -cf archive2.tar a &&
  69    tar -xf archive2.tar -C dest2 a
  70   ) &&
  71   diff -r a dest2/a
  72 ) >/dev/null 2>&1 &&
  73    AT_SKIP_TEST
  74
  75 # Tar should work when there are few, but enough, file descriptors.
  76 ( (exec 3<&- 4<&- 5<&- 6<&- 7<&- 8<&- 9<&- &&
  77    ulimit -n 10 &&
  78    tar -cf archive3.tar a &&
  79    tar -xf archive3.tar -C dest3 a
  80   ) &&
  81   diff -r a dest3/a >/dev/null 2>&1
  82 ) || { diff -r a dest3/a; exit 1; }
  83 ],
  84 [0],[],[],[],[],[gnu])
  85
  86 AT_CLEANUP