tests/du/slink

   1 #!/bin/sh
   2 # Ensure that the size of a long-named-symlink is > 0.
   3
   4 # Copyright (C) 2002-2008 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   du --version
  22 fi
  23
  24 . $srcdir/test-lib.sh
  25
  26 # Determine if `.' is on a local (would non-NFS be sufficient?) file system.
  27 # On at least some NFS implementations, symlinks never take up space,
  28
  29 # So if this is a non-local file system, skip the test.
  30 if df --local . >/dev/null 2>&1; then
  31   : # Ok.
  32 else
  33   skip_test_ "\`.' is on a non-local file system"
  34 fi
  35
  36 if df --type=xfs . >/dev/null 2>&1; then
  37   # At least on Irix-6.5.19, when using an xfs file system,
  38   # each created symlink (name lengths up to 255) would have a size of `0'.
  39   skip_test_ "\`.' is on an XFS file system"
  40 fi
  41
  42 if df --type=nfsv3 . >/dev/null 2>&1; then
  43   # At least on OSF/1 4.0d, when using an nfsv3 file system,
  44   # each created symlink can end up having a size of 0.
  45   skip_test_ "\`.' is on an NFS file system"
  46 fi
  47
  48 fail=0
  49 symlink_name_lengths='1 15 16 31 32 59 60 63 64 127 128 255 256 511 512 1024'
  50 for len in $symlink_name_lengths; do
  51   name=`seq 1 $len|tr -c x y |head -c$len`
  52   # Record the names of symlinks that are successfully created.
  53   ln -fs $name $len > /dev/null 2>&1 \
  54     && symlinks="$symlinks $len"
  55 done
  56
  57 du -a $symlinks > out || fail=1
  58
  59 # Require that at least one of these symlinks has a non-zero size.
  60 grep '^[1-9]' out > /dev/null || fail=1
  61
  62 Exit $fail