shell处理用户输入总结

ゞ浴缸里的玫瑰 2022-05-16 10:38 160阅读 0赞

# 处理简单选项 #

#/bin/bash
    # extracting command line options as parameters
    
    echo
    while [ -n "$1" ]
    do
      case "$1" in
        -a) echo "Found the -a option" ;;
        -b) echo "Found the -b option" ;;
        -c) echo "Found the -c option" ;;
        *) echo "$1 not an option";;
        esac
        shift
     done

# 分离参数与选项 #

#/bin/bash
    # extracting options and parameters
    echo
    while [ -n "$1" ]
    do
      case "$1" in
        -a) echo "Found the -a option" ;;
        -b) echo "Found the -b option" ;;
        -c) echo "Found the -c option" ;;
        --) shift
            break ;;
         *) echo "$1 not an option";;
        esac
        shift
     done 
     #
     count=1
     for param in "$@"
     do
       echo "Parameter #$count: $param"
       count=$[ $count + 1 ]
     done

# 处理带值的选项 #

#/bin/bash
    # extracting command line and values
    echo
    while [ -n "$1" ]
    do
      case "$1" in
        -a) echo "Found the -a option" ;;
        -b) param="$2"
            echo "Found the -b option,with parameter value $param"
            shift ;;
        -c) echo "Found the -c option" ;;
        --) shift
            break ;;
         *) echo "$1 not an option";;
        esac
        shift
     done 
     #
     count=1
     for param in "$@"
     do
       echo "Parameter #$count: $param"
       count=$[ $count + 1 ]
     done

# 使用getopt命令 #

*  getopt ab:cd -a -b test1 -cd test2 test3

#/bin/bash
    # extracting command line and values with getopt
    set -- $(getopt -q ab:cd "$@")
    #
    echo
    while [ -n "$1" ]
    do
      case "$1" in
        -a) echo "Found the -a option" ;;
        -b) param="$2"
            echo "Found the -b option,with parameter value $param"
            shift ;;
        -c) echo "Found the -c option" ;;
        --) shift
            break ;;
         *) echo "$1 not an option";;
        esac
        shift
     done 
     #
     count=1
     for param in "$@"
     do
       echo "Parameter #$count: $param"
       count=$[ $count + 1 ]
     done

*  getopts

#!/bin/bash
    # simple demonstration of the getopts command
    #
    echo
    while getopts :ab:c opt
    do
      case "$opt" in
        a) echo "Found the -a option" ;;
        b) echo "Found the -b option",with value $OPTARG ;;
        c) echo "Found the -c option" ;;   
        *) echo "Unknown option: $opt" ;;
      esac
    done

*  未完待续……