tests/tail-2/pipe-f2

   1 #!/bin/sh
   2 # Ensure that "tail -f fifo" tails indefinitely.
   3
   4 # Copyright (C) 2009-2011 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 . "${srcdir=.}/init.sh"; path_prepend_ ../src
  20 print_ver_ tail
  21
  22 mkfifo_or_skip_ fifo
  23
  24 echo 1 > fifo &
  25 echo 1 > exp || framework_failure_
  26
  27 timeout 10 tail -f fifo > out & pid=$!
  28
  29 check_tail_output()
  30 {
  31   local n_sec="$1"
  32   test -s out || { sleep $n_sec; return 1; }
  33 }
  34
  35 # Wait 6.3s for tail to write something.
  36 retry_delay_ check_tail_output .1 7 || fail=1
  37
  38 compare exp out || fail=1
  39
  40 # Kill the still-running tail, or fail if it's gone.
  41 kill $pid || fail=1
  42
  43 Exit $fail