tests/mv/vfat

   1 #!/bin/sh
   2 # This is just for the record.
   3 # This test is not run.
   4
   5 # Copyright (C) 2003, 2009 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 <http://www.gnu.org/licenses/>.
  19
  20 exit 0
  21
  22 cat <<\EOF
  23
  24 Prior to 5.0.91, ...
  25
  26 The problem:
  27   On a VFAT file system with coreutils-5.0.90, `mv FOO foo' removes the
  28   sole copy of the file named by both the source and destination arguments.
  29
  30 Demonstrate the problem, as root:
  31
  32 cd /tmp                                    \
  33   && dd if=/dev/zero of=1 bs=8192 count=50 \
  34   && mkdir mnt && mkfs -t vfat 1           \
  35   && mount -oloop 1 mnt && cd mnt          \
  36   && printf something important > foo      \
  37   && mv foo FOO
  38 test -f FOO && echo PASS-1 || echo FAIL-1
  39 ln foo bar
  40 mv foo FOO
  41 test -f FOO && echo PASS-2 || echo FAIL-2
  42
  43 And in case you actually do the above, you can do this to clean up:
  44
  45   cd /tmp && umount /tmp/mnt && rm -r 1 mnt
  46
  47 Hey!  Can't create hard links on vfat.
  48 The above `ln' evokes an `operation not permitted' failure.
  49
  50 This demonstrates the same thing with file system type `umsdos'
  51 No hard links:
  52
  53 cd /tmp                                    \
  54   && dd if=/dev/zero of=1 bs=8192 count=50 \
  55   && mkdir mnt && mkfs -t msdos 1          \
  56   && mount -t umsdos -oloop 1 mnt && cd mnt \
  57   && printf something important > foo      \
  58   && mv foo FOO
  59 test -f FOO && echo PASS-1 || echo FAIL-1
  60 ln foo bar
  61 mv foo FOO
  62 test -f FOO && echo PASS-2 || echo FAIL-2
  63
  64 EOF