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cannam@89
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1 #!/bin/sh
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2 # sh is buggy on RS/6000 AIX 3.2. Replace above line with #!/bin/ksh
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3
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cannam@89
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4 # Bzcmp/diff wrapped for bzip2,
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5 # adapted from zdiff by Philippe Troin <phil@fifi.org> for Debian GNU/Linux.
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6
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7 # Bzcmp and bzdiff are used to invoke the cmp or the diff pro-
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8 # gram on compressed files. All options specified are passed
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9 # directly to cmp or diff. If only 1 file is specified, then
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10 # the files compared are file1 and an uncompressed file1.gz.
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11 # If two files are specified, then they are uncompressed (if
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12 # necessary) and fed to cmp or diff. The exit status from cmp
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13 # or diff is preserved.
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14
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15 PATH="/usr/bin:/bin:$PATH"; export PATH
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16 prog=`echo $0 | sed 's|.*/||'`
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17 case "$prog" in
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18 *cmp) comp=${CMP-cmp} ;;
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19 *) comp=${DIFF-diff} ;;
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20 esac
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21
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22 OPTIONS=
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23 FILES=
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24 for ARG
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25 do
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26 case "$ARG" in
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27 -*) OPTIONS="$OPTIONS $ARG";;
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28 *) if test -f "$ARG"; then
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29 FILES="$FILES $ARG"
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30 else
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31 echo "${prog}: $ARG not found or not a regular file"
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32 exit 1
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33 fi ;;
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34 esac
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35 done
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36 if test -z "$FILES"; then
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37 echo "Usage: $prog [${comp}_options] file [file]"
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38 exit 1
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39 fi
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40 tmp=`mktemp ${TMPDIR:-/tmp}/bzdiff.XXXXXXXXXX` || {
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41 echo 'cannot create a temporary file' >&2
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42 exit 1
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43 }
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44 set $FILES
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45 if test $# -eq 1; then
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46 FILE=`echo "$1" | sed 's/.bz2$//'`
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47 bzip2 -cd "$FILE.bz2" | $comp $OPTIONS - "$FILE"
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48 STAT="$?"
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49
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50 elif test $# -eq 2; then
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51 case "$1" in
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52 *.bz2)
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53 case "$2" in
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54 *.bz2)
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55 F=`echo "$2" | sed 's|.*/||;s|.bz2$||'`
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56 bzip2 -cdfq "$2" > $tmp
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57 bzip2 -cdfq "$1" | $comp $OPTIONS - $tmp
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58 STAT="$?"
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59 /bin/rm -f $tmp;;
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60
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61 *) bzip2 -cdfq "$1" | $comp $OPTIONS - "$2"
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62 STAT="$?";;
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63 esac;;
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64 *) case "$2" in
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65 *.bz2)
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66 bzip2 -cdfq "$2" | $comp $OPTIONS "$1" -
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67 STAT="$?";;
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68 *) $comp $OPTIONS "$1" "$2"
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69 STAT="$?";;
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70 esac;;
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71 esac
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72 exit "$STAT"
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73 else
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74 echo "Usage: $prog [${comp}_options] file [file]"
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75 exit 1
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76 fi
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