tests/seq/seq-epipe.sh

   1 #!/bin/sh
   2 # Test for proper detection of EPIPE with ignored SIGPIPE
   3
   4 # Copyright (C) 2016-2024 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_ seq
  21 trap_sigpipe_or_skip_
  22
  23 # /bin/sh has an intermittent failure in ignoring SIGPIPE on OpenIndiana 11
  24 # so we require bash as discussed at:
  25 # https://lists.gnu.org/archive/html/coreutils/2020-03/msg00004.html
  26 require_bash_as_SHELL_
  27
  28 # upon EPIPE with signals ignored, 'seq' should exit with an error.
  29 timeout 10 $SHELL -c \
  30   'trap "" PIPE && { seq inf 2>err; echo $? >code; } | head -n1' >out
  31
  32 # Exit-code must be 1, indicating 'write error'
  33 echo 1 > exp || framework_failure_
  34 compare exp out || fail=1
  35 compare exp code || fail=1
  36
  37 grep '^seq: write error: ' err \
  38   || { warn_ "seq emitted incorrect error on EPIPE"; \
  39        cat err;\
  40        fail=1; }
  41
  42 Exit $fail