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 #ident  "%Z%%M% %I%     %E% SMI"        /* SVr4.0 1.4   */
  31
  32 usage="usage: diff3 file1 file2 file3"
  33
  34 # mktmpdir - Create a private (mode 0700) temporary directory inside of /tmp
  35 # for this process's temporary files.  We set up a trap to remove the
  36 # directory on exit (trap 0), and also on SIGHUP, SIGINT, SIGQUIT, SIGPIPE,
  37 # and SIGTERM.
  38
  39 mktmpdir() {
  40         tmpdir=/tmp/diff3.$$
  41         trap '/usr/bin/rm -rf $tmpdir' 0 1 2 3 13 15
  42         /usr/bin/mkdir -m 700 $tmpdir || exit 1
  43 }
  44 mktmpdir
  45
  46 e=
  47 case $1 in
  48 -*)
  49         e=$1
  50         shift;;
  51 esac
  52 if [ $# != 3 ]; then
  53         echo ${usage} 1>&2
  54         exit 1
  55 fi
  56 if [ \( -f $1 -o -c $1 \) -a \( -f $2 -o -c $2 \) -a \( -f $3 -o -c $3 \) ]; then
  57         :
  58 else
  59         echo ${usage} 1>&2
  60         exit 1
  61 fi
  62 f1=$1 f2=$2 f3=$3
  63 if [ -c $f1 ]
  64 then
  65         /usr/bin/cat $f1 > $tmpdir/d3c$$
  66         f1=$tmpdir/d3c$$
  67 fi
  68 if [ -c $f2 ]
  69 then
  70         /usr/bin/cat $f2 > $tmpdir/d3d$$
  71         f2=$tmpdir/d3d$$
  72 fi
  73 if [ -c $f3 ]
  74 then
  75         /usr/bin/cat $f3 > $tmpdir/d3e$$
  76         f3=$tmpdir/d3e$$
  77 fi
  78
  79 /usr/bin/diff $f1 $f3 > $tmpdir/d3a$$ 2> $tmpdir/d3a$$.err
  80 STATUS=$?
  81 if [ $STATUS -eq 1 ]
  82 then
  83         grep -q "^[<>]" $tmpdir/d3a$$
  84         RET=$?
  85         if [ $RET -eq 1 ]
  86         then
  87                 /usr/bin/cat $tmpdir/d3a$$
  88                 exit $STATUS
  89         fi
  90
  91         if [ $RET -gt 1 ]
  92         then
  93                 echo "diff3 failed" 1>&2
  94                 exit $STATUS
  95         fi
  96 fi
  97
  98 if [ $STATUS -gt 1 ]
  99 then
 100         /usr/bin/cat $tmpdir/d3a$$.err
 101         exit $STATUS
 102 fi
 103
 104 /usr/bin/diff $f2 $f3 > $tmpdir/d3b$$ 2> $tmpdir/d3b$$.err
 105 STATUS=$?
 106 if [ $STATUS -eq 1 ]
 107 then
 108         grep -q "^[<>]" $tmpdir/d3b$$
 109         RET=$?
 110         if [ $RET -eq 1 ]
 111         then
 112                 /usr/bin/cat $tmpdir/d3b$$
 113                 exit $STATUS
 114         fi
 115
 116         if [ $RET -gt 1 ]
 117         then
 118                 echo "diff3 failed" 1>&2
 119                 exit $STATUS
 120         fi
 121 fi
 122
 123 if [ $STATUS -gt 1 ]
 124 then
 125         /usr/bin/cat $tmpdir/d3b$$.err
 126         exit $STATUS
 127 fi
 128
 129 /usr/lib/diff3prog $e $tmpdir/d3[ab]$$ $f1 $f2 $f3