tests/tail-2/assert.sh

   1 #!/bin/sh
   2 # Test for assertion failure in "test".
   3
   4 # Copyright (C) 1999-2016 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 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
  27 print_ver_ tail
  28
  29 check_tail_output()
  30 {
  31   local delay="$1"
  32   grep "$tail_re" out ||
  33     { sleep $delay; return 1; }
  34 }
  35
  36 # Terminate any background tail process
  37 cleanup_() { kill $pid 2>/dev/null && wait $pid; }
  38
  39 # Speedup the non inotify case
  40 fastpoll='-s.1 --max-unchanged-stats=1'
  41
  42 for mode in '' '---disable-inotify'; do
  43   rm -f a foo out
  44   touch a foo || framework_failure_
  45
  46   tail $mode --follow=name $fastpoll a foo > out 2>&1 & pid=$!
  47
  48   # Wait up to 12.7s for tail to start.
  49   echo x > a || framework_failure_
  50   tail_re='^x$' retry_delay_ check_tail_output .1 7 ||
  51     { cat out; fail=1; break; }
  52
  53   # Wait 12.7s for this diagnostic:
  54   # tail: foo: No such file or directory
  55   rm foo || framework_failure_
  56   tail_re='No such file' retry_delay_ check_tail_output .1 7 ||
  57     { cat out; fail=1; break; }
  58
  59   # Wait up to 12.7s for tail to notice new foo file
  60   ok='ok ok ok'
  61   echo "$ok" > foo || framework_failure_
  62   tail_re="^$ok$" retry_delay_ check_tail_output .1 7 ||
  63     { echo "$0: foo: unexpected delay?"; cat out; fail=1; break; }
  64
  65   cleanup_
  66 done
  67
  68 Exit $fail