tests/tail/pipe-f2.sh

   1 #!/bin/sh
   2 # Ensure that "tail -f fifo" tails indefinitely.
   3
   4 # Copyright (C) 2009-2023 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 <https://www.gnu.org/licenses/>.
  18
  19 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
  20 print_ver_ tail
  21
  22 mkfifo_or_skip_ fifo
  23
  24 echo 1 > fifo &
  25 echo 1 > exp || framework_failure_
  26
  27 # Terminate any background tail process
  28 cleanup_() { kill $pid 2>/dev/null && wait $pid; }
  29
  30 # Speedup the non inotify case
  31 fastpoll='-s.1 --max-unchanged-stats=1'
  32
  33 timeout 10 tail $fastpoll -f fifo > out & pid=$!
  34
  35 check_tail_output() { sleep $1; test -s out; }
  36
  37 # Wait 12.7s for tail to write something.
  38 retry_delay_ check_tail_output .1 7 || fail=1
  39
  40 compare exp out || fail=1
  41
  42 # Ensure tail is still running
  43 kill -0 $pid || fail=1
  44
  45 cleanup_
  46
  47 Exit $fail