[dm-devel] dmraid/tools relpath.awk
zkabelac at sourceware.org
zkabelac at sourceware.org
Fri May 28 12:32:48 UTC 2010
CVSROOT: /cvs/dm
Module name: dmraid
Changes by: zkabelac at sourceware.org 2010-05-28 12:32:48
Added files:
tools : relpath.awk
Log message:
Reused relpath.awk script for relative paths from lvm2
Patches:
http://sourceware.org/cgi-bin/cvsweb.cgi/dmraid/tools/relpath.awk.diff?cvsroot=dm&r1=NONE&r2=1.1
/cvs/dm/dmraid/tools/relpath.awk,v --> standard output
revision 1.1
--- dmraid/tools/relpath.awk
+++ - 2010-05-28 12:32:48.876050000 +0000
@@ -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/
+
+{
+ length_from = split($1, from, "/");
+ length_to = 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
+}
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