tests/tail-2/inotify-hash-abuse2.sh

   1 #!/bin/sh
   2 # Exercise an abort-inducing flaw in inotify-enabled tail -F.
   3 # Like inotify-hash-abuse, but without a hard-coded "9".
   4
   5 # Copyright (C) 2009-2016 Free Software Foundation, Inc.
   6
   7 # This program is free software: you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation, either version 3 of the License, or
  10 # (at your option) any later version.
  11
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
  21 print_ver_ tail
  22
  23 # Terminate any background tail process
  24 cleanup_() { kill $pid 2>/dev/null && wait $pid; }
  25
  26 # Speedup the non inotify case
  27 fastpoll='-s.1 --max-unchanged-stats=1'
  28
  29 for mode in '' '---disable-inotify'; do
  30   touch f || framework_failure_
  31
  32   tail $mode $fastpoll -F f & pid=$!
  33
  34   for i in $(seq 200); do
  35     kill -0 $pid || break;
  36     mv f g
  37     touch f
  38   done
  39
  40   # Ensure tail hasn't aborted
  41   kill -0 $pid || fail=1
  42
  43   cleanup_
  44 done
  45
  46 Exit $fail