tests/ln/relative.sh

   1 #!/bin/sh
   2 # Test "ln --relative".
   3
   4 # Copyright (C) 2012-2024 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 <https://www.gnu.org/licenses/>.
  18
  19 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
  20 print_ver_ ln
  21
  22 mkdir -p usr/bin || framework_failure_
  23 mkdir -p usr/lib/foo || framework_failure_
  24 touch usr/lib/foo/foo || framework_failure_
  25
  26 ln -sr usr/lib/foo/foo usr/bin/foo
  27 test $(readlink usr/bin/foo) = '../lib/foo/foo' || fail=1
  28
  29 ln -sr usr/bin/foo usr/lib/foo/link-to-foo
  30 test $(readlink usr/lib/foo/link-to-foo) = 'foo' || fail=1
  31
  32 # Correctly update an existing link, which was broken in <= 8.21
  33 ln -s dir1/dir2/f existing_link
  34 ln -srf here existing_link
  35 test $(readlink existing_link) = 'here' || fail=1
  36
  37 # Demonstrate resolved symlinks used to generate relative links
  38 # so here, 'web/latest' will not be linked to the intermediate 'latest' link.
  39 # You'd probably want to use realpath(1) in conjunction
  40 # with ln(1) without --relative to give greater control.
  41 ln -s release1 alpha
  42 ln -s release2 beta
  43 ln -s beta latest
  44 mkdir web
  45 ln -sr latest web/latest
  46 test $(readlink web/latest) = '../release2' || fail=1
  47
  48 # Expect this to fail with exit status 1, or to succeed quietly (freebsd).
  49 # Prior to coreutils-8.23, it would segfault.
  50 ln -sr '' F
  51 case $? in [01]) ;; *) fail=1;; esac
  52
  53 Exit $fail