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|
#!/bin/sh
#
# Author: Carlos Santos <unixmania@gmail.com>
# This file is in public domain.
#
error() {
echo "$@" 1>&2
exit 1
}
src="$1"
dst="$2"
check_path() {
case "$2" in
*/../*|*/./*|*/.|*/..) error "$1 path '$2' must be absolute";;
*/) error "$1 path '$2' must not end with '/'";;
/?*) ;;
*) error "$1 path '$2' must start with '/'";;
esac
}
check_path "source" "$src"
check_path "destination" "$dst"
# strip leading '/'
src=${src#/*}
tmp=${dst#/*}
s_prefix=${src%%/*}
d_prefix=${tmp%%/*}
# strip leading common
while [ "$s_prefix" = "$d_prefix" ]; do
src="${src#$s_prefix/}"
tmp="${tmp#$d_prefix/}"
s_prefix=${src%%/*}
d_prefix=${tmp%%/*}
done
s_prefix="../"
while [ -n "$d_prefix" ] && [ "$tmp" != "$d_prefix" ]; do
s_prefix="../$s_prefix"
tmp="${tmp#$d_prefix/}"
d_prefix=${tmp%%/*}
done
ln -s -f "$s_prefix$src" "$dst"
|
