Mon script, tadaaa

#!/bin/bash
#sizescan : this scripts scans the current directory/directory tree in order to give the smallest and
#largest file.
#usage : sizescan [-r] [directory]
#if no directory is given the script will scan the current one. If the -r option is given the script will scan
#directories recursively
#variables initializations
directoryDoesNotExist=1
recursive=1 			#starts with false
syntaxError=1
#check the options for incorrect combinations
#if we have two arguments the first one should be -r and the second one should be a valid directory
if [ $# = 2 ]
 then
 #is the first arg -r ?
 if [ 1ドル = "-r" ]
	then
	recursive=0
	else
	syntaxError=0
 fi
 #is the second argument a valid path ?
 if [ -d 2ドル ]
	then
	toScan=2ドル
	else
	directoryDoesNotExist=0
 fi
fi
#if we face a single argument it should be -r or a valid path
if [ $# = 1 ]
 then
 if [ -d 1ドル ]
 	then
	toScan=1ドル
	else
	if [ 1ドル = "-r" ]
	 then
	 recursive=0
	 toScan=`pwd`
	 else
	 directoryDoesNotExist=0
	fi
 fi
fi
#otherwise we just set the scanned directory to current one
if [ $# = 0 ]
 then
 toScan=`pwd`
fi
#if we have a syntax error we print the appropriate message
if [ $syntaxError = 0 ]
 then
 echo Usage sizescan [-r] [directory]
 echo -- -r option scans directories recursively
 exit 1
fi
#if the provided directory doesn t exist we print the appropriate errror message
if [ $directoryDoesNotExist = 0 ]
 then
 echo Provided directory doesn\'t exist!
 exit 1
fi
#Okay, at this stage our options are correct, we know what we want to do and we are sure the directory actually exists
#if we don t want a recursive search we set the parameter maxdepth to 1 in order not to scan subdirs
if [ $recursive = 0 ]
 then
 recursive=
 else
 recursive="-maxdepth 1"
fi
#finally we build the commands that will give us the results and execute them
command_min="ls -la \`find "${toScan}" -type f "${recursive}"\` | awk '{print \5,ドル\9ドル}' | sort -n | head -n 1 | awk '{print \"Smallest - Size: \", \1,ドル \" File:\", \2ドル}'"
command_max="ls -la \`find "${toScan}" -type f "${recursive}"\` | awk '{print \5,ドル\9ドル}' | sort -nr | head -n 1 | awk '{print \"Largest - Size: \", \1,ドル \" File:\", \2ドル}'"
eval $command_min 
eval $command_max