tests/tail-2/assert

   1 #!/bin/sh
   2 # Test for assertion failure in "test".
   3
   4 # Copyright (C) 1999, 2000, 2004, 2006-2009 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 of the License, or
   9 # (at your option) 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
  20 # This test fails with tail from textutils-2.0.
  21 # It would get something like this:
  22 #   tail: tail.c:718: recheck: Assertion `valid_file_spec (f)' failed.
  23 #   Aborted
  24 # due to a race condition in which a dev/inode pair is reused.
  25
  26 if test "$VERBOSE" = yes; then
  27   set -x
  28   tail --version
  29 fi
  30
  31 # Not "expensive" per se, but sleeping for so long is annoying.
  32 . $srcdir/test-lib.sh
  33 very_expensive_
  34
  35 ok='ok ok ok'
  36
  37 touch a foo
  38 tail --follow=name a foo > err 2>&1 &
  39 tail_pid=$!
  40 # Arrange for the tail process to die after 12 seconds.
  41 (sleep 12; kill $tail_pid) &
  42
  43 echo sleeping for 7 seconds...
  44
  45 # Wait for the backgrounded `tail' to start before removing foo.
  46 # Otherwise, without --retry, tail wouldn't try to open `foo' again.
  47 while :; do
  48   env kill -0 $tail_pid && break
  49   echo sleep .1
  50   sleep .1
  51 done
  52
  53 rm -f foo
  54 sleep 6
  55 echo $ok > f
  56 mv f foo
  57
  58 # echo waiting....
  59 wait
  60
  61 case "`cat err`" in
  62   *$ok) fail=0;;
  63   *) fail=1;;
  64 esac
  65
  66 test $fail = 1 && cat err
  67
  68 Exit $fail