Quick & dirty update to support xz in diff/grep/more scripts.

1 files changed, 67 insertions, 0 deletions

diff --git a/src/scripts/xzdiff b/src/scripts/xzdiff
new file mode 100755
index 00000000..50179bb9
--- /dev/null
+++ b/src/scripts/xzdiff
@@ -0,0 +1,67 @@
+#!/bin/sh
+# sh is buggy on RS/6000 AIX 3.2. Replace above line with #!/bin/ksh
+
+# xzcmp and xzdiff 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.xz.
+# If two files are specified, then they are  uncompressed  and
+# fed  to  cmp  or  diff.  The exit status from cmp or diff is
+# preserved.
+
+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}: $ARG not found or not a regular file"
+	    exit 2
+        fi ;;
+    esac
+done
+if test -z "$FILES"; then
+	echo "Usage: $prog [${comp}_options] file [file]"
+	exit 2
+fi
+set $FILES
+if test $# -eq 1; then
+	FILE=`echo "$1" | sed 's/[-.][almtxz]*$//'`
+	xz -dc "$1" | $comp $OPTIONS - "$FILE"
+
+elif test $# -eq 2; then
+	case "$1" in
+        *[-.]xz | *.txz | *[-.]lzma | *.tlz)
+                case "$2" in
+	        *[-.]xz | *.txz | *[-.]lzma | *.tlz)
+			F=`echo "$2" | sed 's|.*/||;s|[-.][almtxz]*||'`
+			TF=`/usr/bin/mktemp ${TMPDIR:-/tmp}/"$F".XXXXXXXXXX` || exit 1
+			trap 'rm -f "$TF"; exit 2' EXIT HUP INT PIPE TERM
+			xz -dc -- "$2" > "$TF" || exit
+                        xz -dc -- "$1" | $comp $OPTIONS - "$TF"
+                        STAT="$?"
+			rm -f "$TF" || STAT=2
+			trap EXIT HUP INT PIPE TERM
+			exit $STAT;;
+
+                *)      xz -dc -- "$1" | $comp $OPTIONS - "$2";;
+                esac;;
+        *)      case "$2" in
+	        *[-.]xz | *.txz | *[-.]lzma | *.tlz)
+                        xz -dc -- "$2" | $comp $OPTIONS "$1" -;;
+                *)      $comp $OPTIONS "$1" "$2";;
+                esac;;
+	esac
+else
+	echo "Usage: $prog [${comp}_options] file [file]"
+	exit 2
+fi