usr/src/cmd/diff3/diff3.sh

   1 #!/usr/bin/sh
   2 #
   3 # CDDL HEADER START
   4 #
   5 # The contents of this file are subject to the terms of the
   6 # Common Development and Distribution License, Version 1.0 only
   7 # (the "License").  You may not use this file except in compliance
   8 # with the License.
   9 #
  10 # You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  11 # or http://www.opensolaris.org/os/licensing.
  12 # See the License for the specific language governing permissions
  13 # and limitations under the License.
  14 #
  15 # When distributing Covered Code, include this CDDL HEADER in each
  16 # file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  17 # If applicable, add the following below this CDDL HEADER, with the
  18 # fields enclosed by brackets "[]" replaced with your own identifying
  19 # information: Portions Copyright [yyyy] [name of copyright owner]
  20 #
  21 # CDDL HEADER END
  22 #
  23 #       Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T
  24 #         All Rights Reserved
  25
  26
  27 #       Copyright (c) 1999, 2001 by Sun Microsystems, Inc.
  28 #       All rights reserved.
  29
  30 usage="usage: diff3 file1 file2 file3"
  31
  32 # mktmpdir - Create a private (mode 0700) temporary directory inside of /tmp
  33 # for this process's temporary files.  We set up a trap to remove the
  34 # directory on exit (trap 0), and also on SIGHUP, SIGINT, SIGQUIT, SIGPIPE,
  35 # and SIGTERM.
  36
  37 mktmpdir() {
  38         tmpdir=/tmp/diff3.$$
  39         trap '/usr/bin/rm -rf $tmpdir' 0 1 2 3 13 15
  40         /usr/bin/mkdir -m 700 $tmpdir || exit 1
  41 }
  42 mktmpdir
  43
  44 e=
  45 case $1 in
  46 -*)
  47         e=$1
  48         shift;;
  49 esac
  50 if [ $# != 3 ]; then
  51         echo ${usage} 1>&2
  52         exit 1
  53 fi
  54 if [ \( -f $1 -o -c $1 \) -a \( -f $2 -o -c $2 \) -a \( -f $3 -o -c $3 \) ]; then
  55         :
  56 else
  57         echo ${usage} 1>&2
  58         exit 1
  59 fi
  60 f1=$1 f2=$2 f3=$3
  61 if [ -c $f1 ]
  62 then
  63         /usr/bin/cat $f1 > $tmpdir/d3c$$
  64         f1=$tmpdir/d3c$$
  65 fi
  66 if [ -c $f2 ]
  67 then
  68         /usr/bin/cat $f2 > $tmpdir/d3d$$
  69         f2=$tmpdir/d3d$$
  70 fi
  71 if [ -c $f3 ]
  72 then
  73         /usr/bin/cat $f3 > $tmpdir/d3e$$
  74         f3=$tmpdir/d3e$$
  75 fi
  76
  77 /usr/bin/diff $f1 $f3 > $tmpdir/d3a$$ 2> $tmpdir/d3a$$.err
  78 STATUS=$?
  79 if [ $STATUS -eq 1 ]
  80 then
  81         /usr/bin/grep -q "^[<>]" $tmpdir/d3a$$
  82         RET=$?
  83         if [ $RET -eq 1 ]
  84         then
  85                 /usr/bin/cat $tmpdir/d3a$$
  86                 exit $STATUS
  87         fi
  88
  89         if [ $RET -gt 1 ]
  90         then
  91                 echo "diff3 failed" 1>&2
  92                 exit $STATUS
  93         fi
  94 fi
  95
  96 if [ $STATUS -gt 1 ]
  97 then
  98         /usr/bin/cat $tmpdir/d3a$$.err
  99         exit $STATUS
 100 fi
 101
 102 /usr/bin/diff $f2 $f3 > $tmpdir/d3b$$ 2> $tmpdir/d3b$$.err
 103 STATUS=$?
 104 if [ $STATUS -eq 1 ]
 105 then
 106         /usr/bin/grep -q "^[<>]" $tmpdir/d3b$$
 107         RET=$?
 108         if [ $RET -eq 1 ]
 109         then
 110                 /usr/bin/cat $tmpdir/d3b$$
 111                 exit $STATUS
 112         fi
 113
 114         if [ $RET -gt 1 ]
 115         then
 116                 echo "diff3 failed" 1>&2
 117                 exit $STATUS
 118         fi
 119 fi
 120
 121 if [ $STATUS -gt 1 ]
 122 then
 123         /usr/bin/cat $tmpdir/d3b$$.err
 124         exit $STATUS
 125 fi
 126
 127 /usr/lib/diff3prog $e $tmpdir/d3[ab]$$ $f1 $f2 $f3