tests/dd/stderr

   1 #!/bin/sh
   2 # Ensure dd recognizes failure to write to stderr.
   3
   4 # Copyright (C) 2009-2010 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 if test "$VERBOSE" = yes; then
  20   set -x
  21   dd --version
  22 fi
  23
  24 . $srcdir/test-lib.sh
  25
  26 p=$abs_top_builddir
  27
  28
  29 # Ensure this exits successfully, even though stderr is closed,
  30 # because it generates no stderr output.
  31 dd --help >/dev/null 2>&- || fail=1
  32
  33 # If 2>&- works, ensure this fails, because stderr is closed and it
  34 # *does* generate output.  2>&- apparently does not work in HP-UX 11.23.
  35 # This test is ineffective unless /dev/stderr also works.
  36 # This exposes a failure present in 6.11 through 7.5.
  37 if "$p/src/test" -w /dev/stderr 2>/dev/null &&
  38    "$p/src/test" ! -w /dev/stderr 2>&-; then
  39   : | dd 2>&- && fail=1
  40 fi
  41
  42 # Likewise for /dev/full, if /dev/full works.
  43 if test -w /dev/full && test -c /dev/full; then
  44   : | dd 2>/dev/full && fail=1
  45 fi
  46
  47 Exit $fail