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Diffstat (limited to 'nuttx/tools/link.sh')
-rwxr-xr-x | nuttx/tools/link.sh | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/nuttx/tools/link.sh b/nuttx/tools/link.sh new file mode 100755 index 000000000..7927d65c8 --- /dev/null +++ b/nuttx/tools/link.sh @@ -0,0 +1,87 @@ +#!/bin/bash +############################################################################ +# tools/link.sh +# +# Copyright (C) 2008 Gregory Nutt. All rights reserved. +# Author: Gregory Nutt <spudmonkey@racsa.co.cr> +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# +# 1. Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# 2. 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. +# 3. Neither the name NuttX 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 OF THIS SOFTWARE, EVEN IF ADVISED OF THE +# POSSIBILITY OF SUCH DAMAGE. +# +############################################################################ +#set -x + +src=$1 +dest=$2 + +# Verify that arguments were provided + +if [ -z "${src}" -o -z "${dest}" ]; then + echo "Missing src and/or dest arguments" + exit 1 +fi + +# Check if something already exists at the destination path replace it with +# the new link (which might be different). Note that we check for the +# the link (-h) before we check for existence (-e) because a bad link will +# report that it does not exist. + +if [ -h "${dest}" ]; then + rm -f "${dest}" +else + + # If the path exists and is a directory that contains the "fake link" + # mark, then treat it like a soft link (i.e., remove the directory) + + if [ -d "${dest}" -a -f "${dest}/.fakelnk" ]; then + rm -rf "${dest}" + else + + # Does anything exist at the destination path? + + if [ -e "${dest}" ]; then + + # It is something else (like a file) or directory that does + # not contain the "fake link" mark + + echo "${dest} already exists but is not a symbolic link" + exit 1 + fi + fi +fi + +# Verify that a directory exists at the source path + +if [ ! -d "${src}" ]; then + echo "No directory at ${src}" + exit 1 +fi + +# Create the soft link + +ln -s "${src}" "${dest}" || \ + { echo "Failed to create link: $dest" ; exit 1 ; } |