tests/misc/cat-buf.sh

   1 #!/bin/sh
   2 # Ensure that cat outputs processed data immediately.
   3
   4 # Copyright (C) 2009-2013 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=.}/tests/init.sh"; path_prepend_ ./src
  20 print_ver_ cat
  21
  22 # Use a fifo rather than a pipe in the tests below
  23 # so that the producer (cat) will wait until the
  24 # consumer (dd) opens the fifo therefore increasing
  25 # the chance that dd will read the data from each
  26 # write separately.
  27 mkfifo_or_skip_ fifo
  28
  29
  30 echo 1 > exp
  31
  32 cat_buf_1()
  33 {
  34   local delay="$1"
  35
  36   dd count=1 if=fifo > out &
  37   (echo 1; sleep $delay; echo 2) | cat -v > fifo
  38   wait # for dd to complete
  39   compare exp out
  40 }
  41
  42 retry_delay_ cat_buf_1 .1 6 || fail=1
  43
  44 Exit $fail