tests/ln/misc

   1 #!/bin/sh
   2 # Miscellaneous tests for "ln".
   3
   4 # Copyright (C) 1998-2000, 2004, 2006-2007 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 if test "$VERBOSE" = yes; then
  20   set -x
  21   ln --version
  22 fi
  23
  24 . $srcdir/../test-lib.sh
  25
  26 t=tln-symlink
  27 d=tln-subdir
  28 ld=tln-symlink-to-subdir
  29 f=tln-file
  30 fail=0
  31
  32 # Create a simple symlink with both source and destination files
  33 # in current directory.
  34 touch $f || framework_failure
  35 rm -f $t || framework_failure
  36 ln -s $f $t || fail=1
  37 test -f $t || fail=1
  38 rm $t $f
  39
  40 # Create a symlink with source file and explicit destination directory/file.
  41 touch $f || framework_failure
  42 rm -rf $d || framework_failure
  43 mkdir $d || framework_failure
  44 ln -s ../$f $d/$t || fail=1
  45 test -f $d/$t || fail=1
  46 rm -rf $d $f
  47
  48 # Create a symlink with source file and destination directory.
  49 touch $f || framework_failure
  50 rm -rf $d || framework_failure
  51 mkdir $d || framework_failure
  52 ln -s ../$f $d || fail=1
  53 test -f $d/$f || fail=1
  54 rm -rf $d $f
  55
  56 # See whether a trailing slash is followed too far.
  57 touch $f || framework_failure
  58 rm -rf $d || framework_failure
  59 mkdir $d $d/$f || framework_failure
  60 ln $f $d/ 2> /dev/null && fail=1
  61 ln -s $f $d/ 2> /dev/null && fail=1
  62 rm -rf $d $f
  63
  64 # Make sure we get a failure with existing dest without -f option
  65 touch $t || framework_failure
  66 # FIXME: don't ignore the error message but rather test
  67 # it to make sure it's the right one.
  68 ln -s $t $t 2> /dev/null && fail=1
  69 rm $t
  70
  71 # Make sure -sf fails when src and dest are the same
  72 touch $t || framework_failure
  73 ln -sf $t $t 2> /dev/null && fail=1
  74 rm $t
  75
  76 # Create a symlink with source file and no explicit directory
  77 rm -rf $d || framework_failure
  78 mkdir $d || framework_failure
  79 touch $d/$f || framework_failure
  80 ln -s $d/$f || fail=1
  81 test -f $f || fail=1
  82 rm -rf $d $f
  83
  84 # Create a symlink with source file and destination symlink-to-directory.
  85 rm -rf $d $f $ld || framework_failure
  86 touch $f || framework_failure
  87 mkdir $d || framework_failure
  88 ln -s $d $ld
  89 ln -s ../$f $ld || fail=1
  90 test -f $d/$f || fail=1
  91 rm -rf $d $f $ld
  92
  93 # Create a symlink with source file and destination symlink-to-directory.
  94 # BUT use the new --no-dereference option.
  95 rm -rf $d $f $ld || framework_failure
  96 touch $f || framework_failure
  97 mkdir $d || framework_failure
  98 ln -s $d $ld
  99 af=`pwd`/$f
 100 ln --no-dereference -fs "$af" $ld || fail=1
 101 test -f $ld || fail=1
 102 rm -rf $d $f $ld
 103
 104 # Try to create a symlink with backup where the destination file exists
 105 # and the backup file name is a hard link to the destination file.
 106 touch a b || framework_failure
 107 ln b b~ || framework_failure
 108 ln -f --b=simple a b || fail=1
 109
 110 # ===================================================
 111 # determine if link(2) follows symlinks on this system
 112 touch a || framework_failure
 113 ln -s a symlink || framework_failure
 114 ln symlink hard-to-sym > /dev/null 2>&1 || framework_failure
 115 ls=`ls -lG hard-to-sym`x
 116 case "$ls" in
 117   *'hard-to-symx') link_follows_symlink=yes ;;
 118   *'hard-to-sym -> ax') link_follows_symlink=no ;;
 119   *) framework_failure ;;
 120 esac
 121
 122 if test $link_follows_symlink = no; then
 123   # Create a hard link to a dangling symlink.
 124   # This is not portable.  At least sunos4.1.4 and OpenBSD 2.3 fail this test.
 125   # They get this:
 126   # ln: cannot create hard link `hard-to-dangle' to `no-such-dir': \
 127   #   No such file or directory
 128   #
 129   ln -s /no-such-dir || fail=1
 130   ln no-such-dir hard-to-dangle > /dev/null 2>&1 || fail=1
 131 fi
 132 rm -rf a symlink hard-to-sym hard-to-dangle
 133 # ===================================================
 134
 135 # Make sure ln can make simple backups.
 136 # This was fixed in 4.0.34.  Broken in 4.0r.
 137 for cmd in ln cp mv ginstall; do
 138   rm -rf a x a.orig
 139   touch a x || framework_failure
 140   $cmd --backup=simple --suffix=.orig x a || fail=1
 141   test -f a.orig || fail=1
 142 done
 143
 144 # ===================================================
 145 # With coreutils-5.2.1, this would mistakenly access argv[1][-1].
 146 # I'm including it here, in case some day programs like valgrind detect that.
 147 # Purify probably would have done so.
 148 ln foo '' 2> /dev/null
 149
 150 # ===================================================
 151
 152 (exit $fail); exit $fail