lib-src/vcdiff

   1 #!/bin/sh
   2 #
   3 # Enhanced sccs diff utility for use with vc mode.
   4 # This version is more compatible with rcsdiff(1).
   5 #
   6 #       $Id: vcdiff,v 1.2 1992/06/03 04:56:26 eric Exp $
   7 #
   8
   9 DIFF="diff"
  10 usage="$0: Usage: vcdiff [-r<sid1>] [-r<sid2>] [diffopts] sccsfile..."
  11
  12 sid1=-r sid2=
  13
  14 for f
  15 do
  16         case $f in
  17         -*)
  18                 case $f in
  19                 -r?*)
  20                         case $sid1 in
  21                         -r)
  22                                 sid1=$f
  23                                 ;;
  24                         *)
  25                                 case $sid2 in
  26                                 ?*) echo "$usage" >&2; exit 2 ;;
  27                                 esac
  28                                 sid2=$f
  29                                 ;;
  30                         esac
  31                         ;;
  32                 *)
  33                         options="$options $f"
  34                         ;;
  35                 esac
  36                 shift
  37                 ;;
  38         *)
  39                 break
  40                 ;;
  41         esac
  42 done
  43
  44 case $# in
  45 0)
  46         echo "$usage" >&2
  47         exit 2
  48 esac
  49
  50
  51 rev1= rev2= status=0
  52 trap 'status=2; exit' 1 2 13 15
  53 trap 'rm -f $rev1 $rev2 || status=2; exit $status' 0
  54
  55 for f
  56 do
  57         s=2
  58
  59         case $f in
  60         s.* | */s.*)
  61                 if
  62                         rev1=/tmp/geta$$
  63                         get -s -p -k $sid1 "$f" > $rev1 &&
  64                         case $sid2 in
  65                         '')
  66                                 workfile=`expr " /$f" : '.*/s.\(.*\)'`
  67                                 ;;
  68                         *)
  69                                 rev2=/tmp/getb$$
  70                                 get -s -p -k $sid2 "$f" > $rev2
  71                                 workfile=$rev2
  72                         esac
  73                 then
  74                         echo $DIFF $options $sid1 $sid2 $workfile >&2
  75                         $DIFF $options $rev1 $workfile
  76                         s=$?
  77                 fi
  78                 ;;
  79         *)
  80                 echo "$0: $f is not an SCCS file" >&2
  81         esac
  82
  83         if test $status -lt $s
  84         then status=$s
  85         fi
  86 done