linux shell 快速入门小例子(shell十三问学习NOTE)

读CU论坛shell十三问后进行的几次小实验，备忘一下！

SHELL十三问地址：http://bbs.chinaunix.net/thread-218853-1-1.html

#!/bin/bash

function func_com()
{
        local a=1
        local b="2c3"
        echo ${a}b
        echo $ab
}

function func_array()
{
        echo "##### func_array #####"
        local PATH="/home/stone"
        source $PATH/include/tt.ini

        #echo $name

        local srand=(1 3 5 2)
        local srand_num=${#srand[*]}

        for((i=0;i<$srand_num;i++));do
        echo $((srand[i]+age))
        done
        echo "##### func_array #####"
}

function func_for()
{
        echo "##### func_for #####"
        local bin_path="/usr"
        local array=(2 3 5 7 9)
        local array_n=${#array[*]}

        for dir in $(ls $bin_path);
        do
        echo $dir
        done

        for ((i=0;i<$array_n;i++));
        do
        echo ${array[i]}
        done
        echo "##### func_for #####"
}

function func_getlen()
{
        echo "$#"
}

function func_param()
{
        echo "##### func_len \[email protected] #####"
        func_getlen     "[email protected]"
        echo "##### func_len \[email protected] #####"

        echo "##### func_len \$* #####"
        func_getlen     "$*"
        echo "##### func_len \$* #####"
}

function func_calc()
{
        echo "##### func_calc \$* #####"
        local a=$RANDOM
        local b=4
        local c=8

        d=$((a+b))
        echo $d
        e=`expr $a + 7`
        echo $e
        echo "##### func_calc \$* #####"
}

function func_exit()
{
        local str1="abc"
        local str2="def"
        echo $str1
        exit 0
        echo $str2
}

function func_if()
{
        local a=1
        local b=3
        local str="abc"

        if [ ! $a=1 ];then
                echo "equal"
        elif [[ $str="abc" ]]
        then
                echo "str equal"
        else
                echo "else"
        fi

}

function func_read()
{
        op=""

        while [[ $op != "q" ]]
        do
                read -p "input one word 'a,b,q'! " op
                case $op in
                a)
                echo "the word is $op";;
                b)
                echo "b";;
                q)
                exit;;
                *)
                echo "input err!"
                esac
        done
}

function func_getopt()
{
        ARGS="`getopt -u -o "ht:a:n:"  -l "help,time:,age:,number:" -- "[email protected]"`"
        [ $? -ne 0 ] && usage
        set -- ${ARGS}
        while [ true ] ;
        do
        case $1 in
                -h|--help)
                        usage
                        shift
                        ;;
                -t|--time)
                        echo "time is $2"
                        shift
                        ;;
                -a|--age)
                        echo "age is $2"
                        shift
                        ;;
                -n|--number)
                        echo "number is $2"
                        shift
                        ;;
                --)
                        shift
                        break
                        ;;
                *)
                        usage
                        ;;
        esac
        shift
        done

}

main()
{
        func_com
        #func_for
        #func_array
        #func_param 1 a 2 b
        #func_calc
        #func_exit
        #func_if
        #func_read
        #case while getopt
        #func_getopt -t 20150320 -a 25 --number 88
}

main