Soe z1

#! /bin/bash
#Autor: DM
declare -a array=(-b -c -d -f -l -p -s)
declare -a array2=("block special file" "character special file" \
    "directory" "regular file" "symbolic link" "named pipe file (FIFO)" \
    "socket file")

if [ "$1" = "--help" ]; then
    echo "
DESCRIPTION
Program searches in arg1 \
directory for files of type arg2.
Directory's permissions must be set to at least r+x.

USAGE
program_name arg1 arg2
arg1 - directory path
arg2 - file type

EXAMPLE OF USAGE
./zad1.sh ~/Desktop -d

POSSIBLE arg2
-b          block special file
-c          character special file
-d          directory
-f          regular file
-l          symbolic link
-p          named pipe file (FIFO)
-s          socket file

EXIT CODE
0           No error
1           Incorrect number of arguments
2           Directory does not exist
3           Directory's read bit is set to 0
4           Directory's execute bit is set to 0
5           Incorrect file type
"
    exit 0
fi

if [ $# -ne 2 ]; then
    echo "Incorrect number of arguments!
Consider using --help"
    exit 1
fi

directory="$1"

if [ ! -d "${directory}" ]; then
    echo "Directory does not exist!
Consider using --help"
    exit 2
fi

if [ ! -r "${directory}" ]; then
    echo "Directory's read bit is set to 0!
Consider using --help"
    exit 3
fi

if [ ! -x "${directory}" ]; then
    echo "Directory's execute bit is set to 0!
Consider using --help"
    exit 4
fi

var=0
flag=false
for i in "${array[@]}"
do
    if [ "$2" == "$i" ]; then
        flag=true
        break
    fi
    ((var++))
done

if [ "$flag" = false ]; then
    echo "Incorrect file type.
Consider using --help"
    exit 5
fi

type="$2"
echo "Directory: ${directory}"
echo -e "Number of files of type \"${array2[$var]}\": \c"

foo () {
    ls -l "$2" | grep "$1" | wc -l | awk '{ printf("%d\n", $0) }'
}

case "$type" in
    "-b") foo "^b" "$1";;
    "-c") foo "^c" "$1";;
    "-d") foo "^d" "$1";;
    "-f") foo "^-" "$1";;
    "-l") foo "^l" "$1";;
    "-p") foo "^p" "$1";;
    "-s") foo "^s" "$1";;
esac