tests/tail-2/assert-2.sh

   1 #!/bin/sh
   2 # This variant of 'assert' would get a Uninit Mem Read reliably in 2.0.9.
   3 # Due to a race condition in the test, the 'assert' script would get
   4 # the UMR on Solaris only some of the time, and not at all on Linux/GNU.
   5
   6 # Copyright (C) 2000-2016 Free Software Foundation, Inc.
   7
   8 # This program 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 # This program 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 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
  22 print_ver_ tail
  23
  24 check_tail_output()
  25 {
  26   local delay="$1"
  27   grep "$tail_re" out ||
  28     { sleep $delay; return 1; }
  29 }
  30
  31 # Terminate any background tail process
  32 cleanup_() { kill $pid 2>/dev/null && wait $pid; }
  33
  34 # Speedup the non inotify case
  35 fastpoll='-s.1 --max-unchanged-stats=1'
  36
  37 for mode in '' '---disable-inotify'; do
  38   rm -f a foo out
  39   touch a || framework_failure_
  40
  41   tail $mode --follow=name $fastpoll a foo > out 2>&1 & pid=$!
  42
  43   # Wait up to 12.7s for tail to start.
  44   echo x > a || framework_failure_
  45   tail_re='^x$' retry_delay_ check_tail_output .1 7 ||
  46     { cat out; fail=1; break; }
  47
  48   # Wait up to 12.7s for tail to notice new foo file
  49   ok='ok ok ok'
  50   echo "$ok" > foo || framework_failure_
  51   tail_re="^$ok$" retry_delay_ check_tail_output .1 7 ||
  52     { echo "$0: foo: unexpected delay?"; cat out; fail=1; break; }
  53
  54   cleanup_
  55 done
  56
  57 Exit $fail