support/fixlinks

   1 #! /bin/sh
   2 #
   3 # fixlinks - make symlinks in the bush source tree so that there is
   4 #            exactly one version of any given source file.
   5 #
   6 # Copyright (C) 1996-2002 Free Software Foundation, Inc.
   7 #
   8 #   This program is free software: you can redistribute it and/or modify
   9 #   it under the terms of the GNU General Public License as published by
  10 #   the Free Software Foundation, either version 3 of the License, or
  11 #   (at your option) any later version.
  12 #
  13 #   This program is distributed in the hope that it will be useful,
  14 #   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 #   GNU General Public License for more details.
  17 #
  18 #   You should have received a copy of the GNU General Public License
  19 #   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 #
  21
  22 SRCDIR=.
  23 while [ $# -gt 0 ]; do
  24         case "$1" in
  25         -s)     shift; SRCDIR=$1 ;;
  26         -u)     unfix=yes ;;
  27         -h)     hardlinks=yes ;;
  28         -*)     echo "$0: $1: bad option" 1>&2
  29                 echo "$0: usage: $0 [-hu] [-s srcdir] [linkmap]" 1>&2
  30                 exit 1;;
  31         *)      break ;;
  32         esac
  33         shift
  34 done
  35
  36 if [ ! -d $SRCDIR/builtins ]; then
  37         echo "$0: must be run with valid -s argument or from source directory" 1>&2
  38         exit 1
  39 fi
  40
  41 if [ $# -eq 0 ]; then
  42         linkfile=$SRCDIR/support/SYMLINKS
  43 else
  44         linkfile=$1
  45 fi
  46
  47 if [ ! -f "$linkfile" ]; then
  48         echo "$0: symlink map file \`$linkfile' does not exist"
  49         exit 1
  50 fi
  51
  52 rm_ltmp=false
  53 LINKTEMP=`mktemp -t linktmp.XXXXXXXX 2>/dev/null`
  54 if [ -z "$LINKTEMP" ]; then
  55         : ${TMPDIR:=/tmp}
  56         LINKTEMP=${TMPDIR}/linktmp.$$
  57         rm_ltmp=true
  58 fi
  59
  60 $rm_ltmp && rm -f ${LINKTEMP}
  61 # if the user specified hard links, then do that.  otherwise, try to use
  62 # symlinks if they're present
  63 if [ -n "$hardlinks" ]; then
  64         LN=ln
  65 elif (ln -s /dev/null ${LINKTEMP}) >/dev/null 2>&1; then
  66         LN="ln -s"
  67 else
  68         LN=ln
  69 fi
  70 rm -f ${LINKTEMP}
  71
  72 while read name target
  73 do
  74         case "$name" in
  75         \#*)    continue;;
  76         esac
  77
  78         rm -f $name
  79         case "$unfix" in
  80         yes)    dirname=`expr "$name" ':' '^\(.*\)/[^/]*'`
  81                 [ -z "$dirname" ] && dirname=.
  82                 cp $dirname/$target $name
  83                 echo $target copied to $name ;;
  84         *)      $LN $target $name ; echo "$name -> $target" ;;
  85         esac
  86
  87 done < $linkfile
  88
  89 exit 0