#! /bin/bash

# Version: MPL 1.1 / GPLv3+ / LGPLv3+
#
# The contents of this file are subject to the Mozilla Public License Version
# 1.1 (the "License"); you may not use this file except in compliance with
# the License or as specified alternatively below. You may obtain a copy of
# the License at http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS IS" basis,
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
# for the specific language governing rights and limitations under the
# License.
#
# Major Contributor(s): 
# Copyright (C) 2011 Tata Consultancy Services, Ltd. Marc-Andre Laverdiere <marc-andre@atc.tcs.com> (initial developer) 
#
# All Rights Reserved.
#
# For minor contributions see the git repository.
#
# Alternatively, the contents of this file may be used under the terms of
# either the GNU General Public License Version 3 or later (the "GPLv3+"), or
# the GNU Lesser General Public License Version 3 or later (the "LGPLv3+"),
# in which case the provisions of the GPLv3+ or the LGPLv3+ are applicable
# instead of those above.

#check that zzuf is installed
hash zzuf &> /dev/null
if [ $? -eq 1 ];then
    echo >&2 "zzuf not found. Please install and/or fix the PATH environement variable. Aborting"
    exit -1
fi

#check that file(s) to fuzz are mentioned
if [[ $# -eq 0 ]]; then
    echo "Usage: fuzzfiles.sh <list of seed files to fuzz>"
    echo "The generated fuzzed files will be output to the current working directory"
    echo "The fuzzed files will be named XYZ-ratio-NNNN where:"
    echo -e "\tXYZ: the original file name"
    echo -e "\tratio: the fuzz ratio (what % of bytes were fuzzed)"
    echo -e "\tNNNN: the mutation # for that file and ratio combo"
    exit -1
fi

for file in $@; do
    if [ -d $file ]; then
        echo "$file is a directory. Only files are allowed"
    elif [ -e $file ]; then
        basename=${file##*/}
        #Sequence from 0.001 to 0.5
        for ratio in `seq -w 1 2 500 | sed -e 's/^/0./'`; do
            echo "Fuzzing $file with ratio $ratio"
            for i in {1..1000}; do
                zzuf -r $ratio < $file > "$basename-$ratio-$i"
                done #end of for i in {1..
            done #end of for ratio in ...
    fi #end if of file vailidity check
done #end for file in $@