doc: add required python versions

[dpdk.git] / scripts / relpath.sh

diff --git a/scripts/relpath.sh b/scripts/relpath.sh
index c092af0..4ff4671 100755 (executable)
--- a/scripts/relpath.sh
+++ b/scripts/relpath.sh
@@ -1,36 +1,35 @@
 #!/bin/sh
 
 #   BSD LICENSE
-# 
-#   Copyright(c) 2010-2012 Intel Corporation. All rights reserved.
+#
+#   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
 #   All rights reserved.
-# 
-#   Redistribution and use in source and binary forms, with or without 
-#   modification, are permitted provided that the following conditions 
+#
+#   Redistribution and use in source and binary forms, with or without
+#   modification, are permitted provided that the following conditions
 #   are met:
-# 
-#     * Redistributions of source code must retain the above copyright 
+#
+#     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above copyright 
-#       notice, this list of conditions and the following disclaimer in 
-#       the documentation and/or other materials provided with the 
+#     * Redistributions in binary form must reproduce the above copyright
+#       notice, this list of conditions and the following disclaimer in
+#       the documentation and/or other materials provided with the
 #       distribution.
-#     * Neither the name of Intel Corporation nor the names of its 
-#       contributors may be used to endorse or promote products derived 
+#     * Neither the name of Intel Corporation nor the names of its
+#       contributors may be used to endorse or promote products derived
 #       from this software without specific prior written permission.
-# 
-#   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
-#   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
-#   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 
-#   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
-#   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
-#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
-#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
-#   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
-#   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
-#   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
+#
+#   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+#   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+#   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+#   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+#   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+#   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+#   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+#   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 #   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-# 
 
 #
 # print the relative path of $1 from $2 directory
@@ -44,8 +43,13 @@ if [ $# -ne 2 ]; then
        exit 1
 fi
 
-REL1=${1#/}
-REL2=${2#/}
+# get the real absolute path, derefencing symlinks
+ABS1=$(readlink -f $1)
+ABS2=$(readlink -f $2)
+
+# remove leading slash
+REL1=${ABS1#/}
+REL2=${ABS2#/}
 
 left1=${REL1%%/*}
 right1=${REL1#*/}
@@ -57,6 +61,8 @@ right2=${REL2#*/}
 prev_right2=$REL2
 prev_left2=
 
+prefix=
+
 while [ "${right1}" != "" -a "${right2}" != "" ]; do
 
        if [ "$left1" != "$left2" ]; then