tests/cp/file-perm-race

   1 #!/bin/sh
   2 # Make sure cp -p isn't too generous with file permissions.
   3
   4 # Copyright (C) 2006-2008 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   cp --version
  22 fi
  23
  24 . $srcdir/test-lib.sh
  25
  26 umask 022
  27 mkfifo fifo ||
  28   skip_test_ "fifos not supported"
  29
  30 # Copy a fifo's contents.  That way, we can examine the
  31 # destination permissions before they're finalized.
  32 cp -p --copy-contents fifo fifo-copy &
  33 cp_pid=$!
  34
  35 (
  36   # Now 'cp' is reading the fifo.  Wait for the destination file to
  37   # be created, encouraging things along by echoing to the fifo.
  38   while test ! -f fifo-copy; do
  39     echo foo
  40   done
  41
  42   # Check the permissions of the destination.
  43   ls -l fifo-copy >ls.out
  44
  45   # Close the fifo so that "cp" can continue.  But output first,
  46   # before exiting, otherwise some shells would optimize away the file
  47   # descriptor that holds the fifo open.
  48   echo foo
  49 ) >fifo
  50
  51 case `cat ls.out` in
  52 -???------*)
  53   fail=0;;
  54 *)
  55   fail=1;;
  56 esac
  57
  58 wait $cp_pid || fail=1
  59
  60 Exit $fail