fixperms.bash

# Quickly adds world read permissions to files and world read/write permissions
# to directories recursively.  «-u user[:group]» will additionally chmod files
# and directories recursively.
function fixperms {
        typeset -a paths
        typeset chownUserGroup

        until ${1+'false'}; do
                case $1 in
                        -u)
                                if [[ -n $2 ]]; then
                                        chownUserGroup=$2
                                        command shift 2
                                else
                                        echo 'Must supply a user:group for the -u option' >&2
                                        return 1
                                fi
                                ;;
                        --)
                                [[ -n $2 ]] && paths+=("${@:2}")
                                command shift "$#"
                                break
                                ;;
                        *) [[ -d $1 ]] && paths+=("$1")
                                command shift
                esac
        done

        (( ${#paths[@]} )) || paths+=(.)

        find -- "${paths[@]}" \
                \( \( -type d -exec chmod o+rx -- {} + \) -o \( -type f -exec chmod o+r -- {} + \) \) \
                ${chownUserGroup:+'-false'} -exec chown "$chownUserGroup" -- {} +
}