dots

git clone git://mattcarlson.org/repos/dots.git
Log | Files | Refs

symlink.sh (905B)

      1 #!/bin/sh
      2 #
      3 # symlink
      4 
      5 follow_link() {
      6     # no file provided
      7     [ "${1:-}" ] || return 1
      8 
      9     file="${1}"
     10 
     11     [ -e "${file%/}" ] || file=${file%"${file##*[!/]}"}
     12     [ -d "${file:-/}" ] && file="${file}/"
     13 
     14     while :; do
     15         if [ ! "${file}" = "${file%/*}" ]; then
     16             # follow with cd
     17             case "${file}" in
     18                 /*) cd -P "${file%/*}/"  2>/dev/null || break ;;
     19                 *)  cd -P "./${file%/*}" 2>/dev/null || break ;;
     20             esac
     21             file=${file##*/}
     22         fi
     23 
     24         # if not link print the actual file
     25         if [ ! -L "${file}" ]; then
     26             file="${PWD%/}${file:+/}${file}"
     27             printf '%s\n' "${file:-/}"
     28             break
     29         fi
     30 
     31         # use ls -dl to follow link
     32         link="$(ls -dl -- "${file}" 2>/dev/null)" || break
     33         file="${link#*" ${file} -> "}"
     34     done
     35 }
     36 
     37 main() { follow_link "${@}" ; }
     38 
     39 main "${@}"