1#!/bin/sh
2# sh is buggy on RS/6000 AIX 3.2. Replace above line with #!/bin/ksh
3
4# Bzcmp/diff wrapped for bzip2,
5# adapted from zdiff by Philippe Troin <phil@fifi.org> for Debian GNU/Linux.
6
7# Bzcmp and bzdiff are used to invoke the cmp or the  diff  pro-
8# gram  on compressed files.  All options specified are passed
9# directly to cmp or diff.  If only 1 file is specified,  then
10# the  files  compared  are file1 and an uncompressed file1.gz.
11# If two files are specified, then they are  uncompressed  (if
12# necessary) and fed to cmp or diff.  The exit status from cmp
13# or diff is preserved.
14
15PATH="/usr/bin:/bin:$PATH"; export PATH
16prog=`echo $0 | sed 's|.*/||'`
17case "$prog" in
18  *cmp) comp=${CMP-cmp}   ;;
19  *)    comp=${DIFF-diff} ;;
20esac
21
22OPTIONS=
23FILES=
24for ARG
25do
26    case "$ARG" in
27    -*)	OPTIONS="$OPTIONS $ARG";;
28     *)	if test -f "$ARG"; then
29            FILES="$FILES $ARG"
30        else
31            echo "${prog}: $ARG not found or not a regular file"
32	    exit 1
33        fi ;;
34    esac
35done
36if test -z "$FILES"; then
37	echo "Usage: $prog [${comp}_options] file [file]"
38	exit 1
39fi
40tmp=`mktemp ${TMPDIR:-/tmp}/bzdiff.XXXXXXXXXX` || {
41      echo 'cannot create a temporary file' >&2
42      exit 1
43}
44set $FILES
45if test $# -eq 1; then
46	FILE=`echo "$1" | sed 's/.bz2$//'`
47	bzip2 -cd "$FILE.bz2" | $comp $OPTIONS - "$FILE"
48	STAT="$?"
49
50elif test $# -eq 2; then
51	case "$1" in
52        *.bz2)
53                case "$2" in
54	        *.bz2)
55			F=`echo "$2" | sed 's|.*/||;s|.bz2$||'`
56                        bzip2 -cdfq "$2" > $tmp
57                        bzip2 -cdfq "$1" | $comp $OPTIONS - $tmp
58                        STAT="$?"
59			/bin/rm -f $tmp;;
60
61                *)      bzip2 -cdfq "$1" | $comp $OPTIONS - "$2"
62                        STAT="$?";;
63                esac;;
64        *)      case "$2" in
65	        *.bz2)
66                        bzip2 -cdfq "$2" | $comp $OPTIONS "$1" -
67                        STAT="$?";;
68                *)      $comp $OPTIONS "$1" "$2"
69                        STAT="$?";;
70                esac;;
71	esac
72        exit "$STAT"
73else
74	echo "Usage: $prog [${comp}_options] file [file]"
75	exit 1
76fi
77