tests/misc/close-stdout.sh

   1 #!/bin/sh
   2 # Ensure that several programs work fine, even with stdout initially closed.
   3 # This is effectively a test of closeout.c's close_stdout function.
   4
   5 # Copyright (C) 2004-2024 Free Software Foundation, Inc.
   6
   7 # This program is free software: you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation, either version 3 of the License, or
  10 # (at your option) any later version.
  11
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19
  20 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
  21 print_ver_ rm
  22
  23 p=$abs_top_builddir
  24
  25
  26 # Ensure these exit successfully, even though stdout is closed,
  27 # because they generate no output.
  28 touch a
  29 cp a b >&- || fail=1
  30 test -f b || fail=1
  31 chmod o-w . >&- || fail=1
  32 ln a c >&- || fail=1
  33 rm c >&- || fail=1
  34 mkdir d >&- || fail=1
  35 mv d e >&- || fail=1
  36 rmdir e >&- || fail=1
  37 touch e >&- || fail=1
  38 sleep 0 >&- || fail=1
  39 "$p/src/true" >&- || fail=1
  40 "$p/src/printf" '' >&- || fail=1
  41
  42 # If >&- works, ensure these fail, because stdout is closed and they
  43 # *do* generate output.  >&- apparently does not work in HP-UX 11.23.
  44 # This test is ineffective unless /dev/stdout also works.
  45 if "$p/src/test" -w /dev/stdout >/dev/null &&
  46    "$p/src/test" ! -w /dev/stdout >&-; then
  47   returns_ 1 "$p/src/printf" 'foo' >&- 2>/dev/null || fail=1
  48   returns_ 1 cp --verbose a b >&- 2>/dev/null || fail=1
  49   rm -Rf tmpfile-?????? || fail=1
  50   returns_ 1 mktemp tmpfile-XXXXXX >&- 2>/dev/null || fail=1
  51   returns_ 1 mktemp tmpfile-XXXXXX -q >&- 2>/dev/null || fail=1
  52   case $(echo tmpfile-??????) in 'tmpfile-??????') ;; *) fail=1 ;; esac
  53 fi
  54
  55 # Likewise for /dev/full, if /dev/full works.
  56 if test -w /dev/full && test -c /dev/full; then
  57   returns_ 1 "$p/src/printf" 'foo' >/dev/full 2>/dev/null || fail=1
  58   returns_ 1 cp --verbose a b >/dev/full 2>/dev/null || fail=1
  59   rm -Rf tmpdir-?????? || fail=1
  60   returns_ 1 mktemp -d tmpdir-XXXXXX >/dev/full 2>/dev/null || fail=1
  61   returns_ 1 mktemp -d -q tmpdir-XXXXXX >/dev/full 2>/dev/null || fail=1
  62   case $(echo tmpfile-??????) in 'tmpfile-??????') ;; *) fail=1 ;; esac
  63 fi
  64
  65 Exit $fail