tests/misc/seq-epipe.sh

   1 #!/bin/sh
   2 # Test for proper detection of EPIPE with ignored SIGPIPE
   3
   4 # Copyright (C) 2016-2017 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_ seq
  21
  22 (trap '' PIPE && yes | :) 2>&1 | grep -qF 'Broken pipe' ||
  23     skip_ 'trapping SIGPIPE is not supported'
  24
  25 # upon EPIPE with signals ignored, 'seq' should exit with an error.
  26 timeout 10 sh -c \
  27   'trap "" PIPE && { seq inf 2>err; echo $? >code; } | head -n1' >out
  28
  29 # Exit-code must be 1, indicating 'write error'
  30 echo 1 > exp || framework_failure_
  31 compare exp out || fail=1
  32 compare exp code || fail=1
  33
  34 # The error message must begin with "standard output:"
  35 # (but don't hard-code the strerror text)
  36 grep '^seq: standard output: ' err \
  37   || { warn_ "seq emitted incorrect error on EPIPE"; \
  38        cat err;\
  39        fail=1; }
  40
  41 Exit $fail