tests/chown/preserve-root

   1 #!/bin/sh
   2 # Verify that --preserve-root works.
   3
   4 # Copyright (C) 2006-2012 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 . "${srcdir=.}/init.sh"; path_prepend_ ../src
  20 print_ver_ chown
  21 skip_if_root_
  22
  23 mkdir d && ln -s / d/slink-to-root
  24
  25
  26 # Even if --preserve-root were to malfunction, allowing the chown or
  27 # chgrp to traverse through "/", since we're running as non-root,
  28 # they would be very unlikely to cause any changes.
  29 chown -R --preserve-root 0 / >  out 2>&1 && fail=1
  30 chgrp -R --preserve-root 0 / >> out 2>&1 && fail=1
  31
  32 # Here, if --preserve-root were to malfunction, chmod could make changes,
  33 # but only to files owned and unreadable by the user running this test,
  34 # and then, only to make them readable by owner.
  35 chmod -R --preserve-root u+r / >> out 2>&1 && fail=1
  36
  37 # With -RHh, --preserve-root should trigger nothing,
  38 # since the symlink in question is not a command line argument.
  39 # Contrary to the above commands, these two should succeed.
  40 echo '==== test -RHh' >> out
  41 chown -RHh --preserve-root `id -u` d >> out 2>&1 || fail=1
  42 chgrp -RHh --preserve-root `id -g` d >> out 2>&1 || fail=1
  43
  44 # These must fail.
  45 echo '==== test -RLh' >> out
  46 chown -RLh --preserve-root `id -u` d >> out 2>&1 && fail=1
  47 chgrp -RLh --preserve-root `id -g` d >> out 2>&1 && fail=1
  48
  49 cat <<\EOF > exp || fail=1
  50 chown: it is dangerous to operate recursively on '/'
  51 chown: use --no-preserve-root to override this failsafe
  52 chgrp: it is dangerous to operate recursively on '/'
  53 chgrp: use --no-preserve-root to override this failsafe
  54 chmod: it is dangerous to operate recursively on '/'
  55 chmod: use --no-preserve-root to override this failsafe
  56 ==== test -RHh
  57 ==== test -RLh
  58 chown: it is dangerous to operate recursively on 'd/slink-to-root' (same as '/')
  59 chown: use --no-preserve-root to override this failsafe
  60 chgrp: it is dangerous to operate recursively on 'd/slink-to-root' (same as '/')
  61 chgrp: use --no-preserve-root to override this failsafe
  62 EOF
  63
  64 compare exp out || fail=1
  65
  66 Exit $fail