tests/ln/sf-1.sh

   1 #!/bin/sh
   2 # Test "ln -sf".
   3
   4 # Copyright (C) 1997-2018 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 echo foo > a || framework_failure_
  23
  24 # Check that a target directory of '.' is supported
  25 # and that indirectly specifying the same target and link name
  26 # through that is detected.
  27 ln -s . b || framework_failure_
  28 ln -sf a b > err 2>&1 && fail=1
  29 case $(cat err) in
  30   *'are the same file') ;;
  31   *) fail=1 ;;
  32 esac
  33
  34 # Ensure we replace symlinks that don't or can't link to an existing target.
  35 # coreutils-8.22 would fail to replace {ENOTDIR,ELOOP,ENAMETOOLONG}_link below.
  36 # We apply a limit since AIX returns 2^32-1 which would trigger resource issues.
  37 name_max=$(stat -f -c %l .) && test "$name_max" -lt $((1024*1024)) ||
  38   name_max=1 # skip this portion of the test
  39 name_max_plus1=$(expr $name_max + 1)
  40 long_name=$(printf '%*s' $name_max_plus1 | tr ' ' '0')
  41
  42 for f in '' f; do
  43   ln -s$f missing ENOENT_link || fail=1
  44   ln -s$f a/b ENOTDIR_link || fail=1
  45   ln -s$f ELOOP_link ELOOP_link || fail=1
  46   ln -s$f "$long_name" ENAMETOOLONG_link || fail=1
  47 done
  48
  49 Exit $fail