2 files changed, 123 insertions, 0 deletions

diff --git a/bzdiff b/bzdiff
new file mode 100644
index 0000000..3c2eb85
--- /dev/null
+++ b/bzdiff
@@ -0,0 +1,76 @@
+#!/bin/sh
+# sh is buggy on RS/6000 AIX 3.2. Replace above line with #!/bin/ksh
+
+# Bzcmp/diff wrapped for bzip2, 
+# adapted from zdiff by Philippe Troin <phil@fifi.org> for Debian GNU/Linux.
+
+# Bzcmp and bzdiff are used to invoke the cmp or the  diff  pro-
+# gram  on compressed files.  All options specified are passed
+# directly to cmp or diff.  If only 1 file is specified,  then
+# the  files  compared  are file1 and an uncompressed file1.gz.
+# If two files are specified, then they are  uncompressed  (if
+# necessary) and fed to cmp or diff.  The exit status from cmp
+# or diff is preserved.
+
+PATH="/usr/bin:$PATH"; export PATH
+prog=`echo $0 | sed 's|.*/||'`
+case "$prog" in
+  *cmp) comp=${CMP-cmp}   ;;
+  *)    comp=${DIFF-diff} ;;
+esac
+
+OPTIONS=
+FILES=
+for ARG
+do
+    case "$ARG" in
+    -*) OPTIONS="$OPTIONS $ARG";;
+     *) if test -f "$ARG"; then
+            FILES="$FILES $ARG"
+        else
+            echo "${prog}: $ARG not found or not a regular file"
+            exit 1
+        fi ;;
+    esac
+done
+if test -z "$FILES"; then
+        echo "Usage: $prog [${comp}_options] file [file]"
+        exit 1
+fi
+tmp=`tempfile -d /tmp -p bz` || {
+      echo 'cannot create a temporary file' >&2
+      exit 1
+}
+set $FILES
+if test $# -eq 1; then
+        FILE=`echo "$1" | sed 's/.bz2$//'`
+        bzip2 -cd "$FILE.bz2" | $comp $OPTIONS - "$FILE"
+        STAT="$?"
+
+elif test $# -eq 2; then
+        case "$1" in
+        *.bz2)
+                case "$2" in
+                *.bz2)
+                        F=`echo "$2" | sed 's|.*/||;s|.bz2$||'`
+                        bzip2 -cdfq "$2" > $tmp
+                        bzip2 -cdfq "$1" | $comp $OPTIONS - $tmp
+                        STAT="$?"
+                        /bin/rm -f $tmp;;
+
+                *)      bzip2 -cdfq "$1" | $comp $OPTIONS - "$2"
+                        STAT="$?";;
+                esac;;
+        *)      case "$2" in
+                *.bz2)
+                        bzip2 -cdfq "$2" | $comp $OPTIONS "$1" -
+                        STAT="$?";;
+                *)      $comp $OPTIONS "$1" "$2"
+                        STAT="$?";;
+                esac;;
+        esac
+        exit "$STAT"
+else
+        echo "Usage: $prog [${comp}_options] file [file]"
+        exit 1
+fi
diff --git a/bzdiff.1 b/bzdiff.1
new file mode 100644
index 0000000..adb7a8e
--- /dev/null
+++ b/bzdiff.1
@@ -0,0 +1,47 @@
+\"Shamelessly copied from zmore.1 by Philippe Troin <phil@fifi.org>
+\"for Debian GNU/Linux
+.TH BZDIFF 1
+.SH NAME
+bzcmp, bzdiff \- compare bzip2 compressed files
+.SH SYNOPSIS
+.B bzcmp
+[ cmp_options ] file1
+[ file2 ]
+.br
+.B bzdiff
+[ diff_options ] file1
+[ file2 ]
+.SH DESCRIPTION
+.I  Bzcmp
+and 
+.I bzdiff
+are used to invoke the
+.I cmp
+or the
+.I diff
+program on bzip2 compressed files.  All options specified are passed
+directly to
+.I cmp
+or
+.IR diff "."
+If only 1 file is specified, then the files compared are
+.I file1
+and an uncompressed
+.IR file1 ".bz2."
+If two files are specified, then they are uncompressed if necessary and fed to
+.I cmp
+or
+.IR diff "."
+The exit status from 
+.I cmp
+or
+.I diff
+is preserved.
+.SH "SEE ALSO"
+cmp(1), diff(1), bzmore(1), bzless(1), bzgrep(1), bzip2(1)
+.SH BUGS
+Messages from the
+.I cmp
+or
+.I diff
+programs refer to temporary filenames instead of those specified.