tests/mv/hard-3.sh

   1 #!/bin/sh
   2 # Ensure that using 'cp --preserve=link' to copy hard-linked arguments
   3 # onto existing destinations works, even when one of the link operations fails.
   4
   5 # Copyright (C) 2003-2024 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 <https://www.gnu.org/licenses/>.
  19
  20
  21 # This bug was fixed in coreutils-4.5.9.
  22 # To exercise this bug is non-trivial:
  23 # Set-up requires at least three hard-linked files.  In copying them,
  24 # while preserving links, the initial copy must succeed, the attempt
  25 # to create the second file via 'link' must fail, and the final 'link'
  26 # (to create the third) must succeed.  Before the corresponding fix,
  27 # the first and third destination files would not be linked.
  28 #
  29 # Note that this is nominally a test of 'cp', yet it is in the tests/mv
  30 # directory, because it requires use of the --preserve=link option that
  31 # mv enables by default.
  32
  33 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
  34 print_ver_ cp
  35 skip_if_root_
  36
  37 mkdir -p x dst/x || framework_failure_
  38 touch dst/x/b || framework_failure_
  39 chmod a-w dst/x
  40 touch a || framework_failure_
  41 ln a x/b || framework_failure_
  42 ln a c || framework_failure_
  43
  44
  45 # ======================================
  46 # This must fail -- because x/b cannot be unlinked.
  47 cp --preserve=link --parents a x/b c dst 2> /dev/null && fail=1
  48
  49 # Source files must remain.
  50 test -f a || fail=1
  51 test -f x/b || fail=1
  52 test -f c || fail=1
  53 cd dst
  54
  55 # Three destination files must exist.
  56 test -f a || fail=1
  57 test -f x/b || fail=1
  58 test -f c || fail=1
  59
  60 # The i-node numbers of a and c must be the same.
  61 ia=$(ls -i a) || fail=1; set x $ia; ia=$2
  62 ic=$(ls -i c) || fail=1; set x $ic; ic=$2
  63 test "$ia" = "$ic" || fail=1
  64
  65 # The i-node number of x/b must be different.
  66 ib=$(ls -i x/b) || fail=1; set x $ib; ib=$2
  67 test "$ia" = "$ib" && fail=1
  68
  69 Exit $fail