Added awk script relpath.awk to calculate relative paths.

1 files changed, 40 insertions, 0 deletions

diff --git a/scripts/relpath.awk b/scripts/relpath.awk
new file mode 100755
index 000000000..26fe1eeaa
--- /dev/null
+++ b/scripts/relpath.awk
@@ -0,0 +1,40 @@
+#!/usr/bin/awk -f
+#
+# Copyright (C) 2010 Red Hat, Inc. All rights reserved.
+#
+# This file is part of LVM2.
+#
+# This copyrighted material is made available to anyone wishing to use,
+# modify, copy, or redistribute it subject to the terms and conditions
+# of the GNU General Public License v.2.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+# relpath.awk: Script is used to calculate relative path
+#	       between two real absolute paths.
+#
+# echo /a/b/c/d  /a/b/e/f | relpath.awk
+# -> ../../e/f/
+
+{
+	split($1, from, "/");
+	split($2, to, "/") ;
+	l = 1;
+	while (l <= length(from) && l <= length(to) && from[l] == to[l])
+		l++;
+	for (i = l; i <= length(from) && length(from[i]); i++) {
+		if (i > l)
+			p = sprintf("%s/", p);
+		p = sprintf("%s..", p);
+	}
+	for (i = l; i <= length(to) && length(to[i]); i++) {
+		if (length(p) > 0)
+			p = sprintf("%s/", p);
+		p = sprintf("%s%s", p, to[i]);
+	}
+	if (length(p))
+		p = sprintf("%s/", p);
+	print p
+}