tests/touch/empty-file

   1 #!/bin/sh
   2 # Make sure touch can set the mtime on an empty file.
   3
   4 # Copyright (C) 1998, 1999, 2000, 2005-2008 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
  20 # Volker Borchert reported that touch 3.16r (and presumably all before that)
  21 # fails to work on SunOS 4.1.3 with `most of the recommended patches' when
  22 # the empty file is on an NFS-mounted 4.2 volume.
  23
  24 if test "$VERBOSE" = yes; then
  25   set -x
  26   touch --version
  27 fi
  28
  29 . $srcdir/test-lib.sh
  30
  31 DEFAULT_SLEEP_SECONDS=2
  32 SLEEP_SECONDS=${SLEEP_SECONDS=$DEFAULT_SLEEP_SECONDS}
  33
  34 fail=0
  35
  36 # FIXME: find writable directories on other partitions
  37 # and run the test in those directories, too.
  38
  39 : ${TOUCH_DIR_LIST=.}
  40
  41
  42 for d in $TOUCH_DIR_LIST; do
  43   rm -rf $d/a $d/b $d/c
  44   > $d/a || framework_failure
  45   test -f $d/a || framework_failure
  46   > $d/b || framework_failure
  47   test -f $d/b || framework_failure
  48   > $d/c || framework_failure
  49   test -f $d/c || framework_failure
  50 done
  51
  52 echo sleeping for $SLEEP_SECONDS seconds...
  53 sleep $SLEEP_SECONDS
  54 for d in $TOUCH_DIR_LIST; do
  55   touch $d/a || fail=1
  56   set x `ls -t $d/a $d/b`
  57   test "$*" = "x $d/a $d/b" || fail=1
  58 done
  59
  60 echo sleeping for $SLEEP_SECONDS seconds...
  61 sleep $SLEEP_SECONDS
  62 for d in $TOUCH_DIR_LIST; do
  63   touch $d/b
  64   set x `ls -t $d/a $d/b`
  65   test "$*" = "x $d/b $d/a" || fail=1
  66
  67   if touch - 1< $d/c 2> /dev/null; then
  68     set x `ls -t $d/a $d/c`
  69     test "$*" = "x $d/c $d/a" || fail=1
  70   fi
  71
  72   rm -rf $d/a $d/b $d/c
  73 done
  74
  75 if test $fail != 0; then
  76   cat 1>&2 <<EOF
  77 *** This test has just failed.  That can happen when the test is run in an
  78 *** NFS-mounted directory on a system whose clock is not well synchronized
  79 *** with that of the NFS server.  If you think that is the reason, set the
  80 *** environment variable SLEEP_SECONDS to some number of seconds larger than
  81 *** the default of $DEFAULT_SLEEP_SECONDS and rerun the test.
  82 EOF
  83 fi
  84
  85 Exit $fail