realpath

#!/bin/zsh
# Usage: realpath [<path>...]
# Print each real absolute <path>, resolving symlinks
# Defaults: <path>: read from stdin

case $# in
0)
    while read path; do
        echo "${path:A}"
    done
    ;;
*)
    for path; do
        echo "${path:A}"
    done
    ;;
esac