#!/bin/bash

# A script which changes, for a given folder:
# - the permissions of all its files to 644 (and "dos2unix" them);
# - the permissions of all its subdirectories to 755

# It was written by Carlo Perassi <carlo@perassi.org> as a modified version
# of Kaz Kylheku script

#From: kaz@ashi.footprints.net (Kaz Kylheku)
#Newsgroups: comp.os.linux.misc
#Subject: Re: bash question: subdirectories
#Message-ID: <slrn8a0gu9.v5n.kaz@ashi.FootPrints.net>
#Date: Tue, 08 Feb 2000 16:24:35 GMT

#Actually it can be made to. That is to say, it is possible to code a recursive
#descender function in the bash language. Here is an example.
#
#What is nice about this is that you can embed the function into your shell
#script. The function changes the current working directory as it descends.
#So it can handle arbitrarily deep paths. Whereas paths generated by the
#find command can cause a problem when they get too long; the kernel has a
#hard limit on the length of the string passed to the open() and other
#system calls.

#There are races; what if the directory tree is blown away during the traversal?
#The function won't be able to crawl back up using the .. link and will just
#bail.

# Recursive Directory Traverser
# Author: Kaz Kylheku
# Date: Feb 27, 1999
# Copyright 1999

# Function parameter usage:
# $1 directory to search

function recurse
{
    local file
    local path

    path="${1%/}/"

    if cd "$1" ; then
        for file in $(ls -la); do
            if [ -f "$file" ]; then
                chmod 644 $file
                if [[ "$file" =~ '[css|dtd|htm|html|ini|js|php|sql|txt|xml|xsl]$' ]]; then
                    dos2unix $file
                fi
            fi
            if [ -d "$file" ]; then
                if [ "$file" = "." ] || [ "$file" = ".." ] ; then
                    continue
                else
                    #echo $file "is a directory"
                    chmod 755 $file
                fi
            fi
        done
        for file in .* * ; do
            if [ "$file" = "." ] || [ "$file" = ".." ] ; then
                continue
            fi
            if [ -d "$file" ] && [ ! -L "$file" ]; then
                recurse $file "$(ls -la)"
            fi
        done
        cd ..
    fi
}

if [ $# -eq 0 ]
then
  echo "Invoke with a folder name as first argument"
  exit
fi
chmod 755 $1
recurse $1