#!/bin/sh

PATH=/bin:/sbin:/usr/bin:/usr/sbin; export PATH

if [ ! -e "$1" ]; then
    echo "[ERROR] Invalid argument: '$1'"
    exit 1
fi

# ------------------------------------------------------------
test_mach_o() {
    if `file -b "$1" | grep 'executable ' | grep -sq 'Mach-O '`; then
        # This is Mach-O file.

        # except kext bundle
        if `file -b "$1" | grep -sq 'kext bundle'`; then
            exit 1
        fi

        exit 0
    fi
    exit 1
}

# ------------------------------------------------------------
find "$1" -print0 | while read -d $'\0' filepath; do
    if [ -d "$filepath" ]; then
        chmod -h 755 "$filepath"
    else
        extension=${filepath##*.}
        if [ "$extension" = 'sh' ]; then
            chmod -h 755 "$filepath"
        elif `test_mach_o "$filepath"`; then
            # preserve the set-user-ID-on-execution bits.
            chmod -h u+rwx,go=rx "$filepath"
        else
            chmod -h 644 "$filepath"
        fi
    fi
done