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 1.4 1993/12/03 09:29:18 eggert Exp eggert $
   7 #
   8
   9 DIFF="diff"
  10 usage="$0: Usage: vcdiff [--brief] [-q] [-r<sid1>] [-r<sid2>] [diffopts] sccsfile..."
  11
  12 PATH=$PATH:/usr/ccs/bin:/usr/sccs # common SCCS hangouts
  13
  14 echo=
  15 sid1=-r sid2=
  16
  17 for f
  18 do
  19         case $f in
  20         -*)
  21                 case $f in
  22                 --brief)
  23                         DIFF=cmp;;
  24                 -q)
  25                         echo=:;;
  26                 -r?*)
  27                         case $sid1 in
  28                         -r)
  29                                 sid1=$f
  30                                 ;;
  31                         *)
  32                                 case $sid2 in
  33                                 ?*) echo "$usage" >&2; exit 2 ;;
  34                                 esac
  35                                 sid2=$f
  36                                 ;;
  37                         esac
  38                         ;;
  39                 *)
  40                         options="$options $f"
  41                         ;;
  42                 esac
  43                 shift
  44                 ;;
  45         *)
  46                 break
  47                 ;;
  48         esac
  49 done
  50
  51 case $# in
  52 0)
  53         echo "$usage" >&2
  54         exit 2
  55 esac
  56
  57
  58 rev1= rev2= status=0
  59 trap 'status=2; exit' 1 2 13 15
  60 trap 'rm -f $rev1 $rev2 || status=2; exit $status' 0
  61
  62 for f
  63 do
  64         s=2
  65
  66         case $f in
  67         s.* | */s.*)
  68                 if
  69                         rev1=/tmp/geta$$
  70                         get -s -p -k $sid1 "$f" > $rev1 &&
  71                         case $sid2 in
  72                         '')
  73                                 workfile=`expr " /$f" : '.*/s.\(.*\)'`
  74                                 ;;
  75                         *)
  76                                 rev2=/tmp/getb$$
  77                                 get -s -p -k $sid2 "$f" > $rev2
  78                                 workfile=$rev2
  79                         esac
  80                 then
  81                         $echo $DIFF $options $sid1 $sid2 $workfile >&2
  82                         $DIFF $options $rev1 $workfile
  83                         s=$?
  84                 fi
  85                 ;;
  86         *)
  87                 echo "$0: $f is not an SCCS file" >&2
  88         esac
  89
  90         if test $status -lt $s
  91         then status=$s
  92         fi
  93 done