Shell 스 크 립 트 전달 매개 변수 3 가지 방법 비교

#!/bin/bash
#extracting command text_text_text_line options as parameters

help_info(){
  echo "NAME"
  echo "\t$0"
  echo "SYNOPSIS"
  echo "\t$0 is a shell test about process options"
  echo "DESCRIPTION"
  echo "\toption like -a -b param1 -c param2 -d"
}

if [ $# -lt 0 ]
then
  help_info
fi

nomal_opts_act()
{
  echo -e "
### nomal_opts_act ###
"

  while [ -n "$1" ]
  do
  case "$1" in 
    -a)
      echo "Found the -a option"
      ;;
    -b)
      echo "Found the -b option"
      echo "The parameter follow -b is $2" 
      shift
      ;;
    -c)
      echo "Found the -c option"
      echo "The parameter follow -c is $2"
      shift
      ;;
    -d)
      echo "Found the -d option"
      ;;
     *)
       echo "$1 is not an option"
      ;;
  esac
  shift
  done
}

# shell         ，           
#  ：    ，     ，     
#  ：  

getopt_act()
{
  echo -e "
### getopt_act ###
"

  GETOPTOUT=`getopt ab:c:d "$@"`
  set -- $GETOPTOUT 
  while [ -n "$1" ] 
  do
  case $1 in 
    -a)
      echo "Found the -a option"
      ;;
    -b)
      echo "Found the -b option"
      echo "The parameter follow -b is "$2""
      shift
      ;;
    -c)
      echo "Found the -c option"
      echo "The parameter follow -c is "$2""
      shift
      ;;
    -d)
      echo "Found the -d option"
      ;;
    --)
      shift
      break
      ;;
     *)
       echo "Unknow option: "$1""
      ;;
  esac
  shift
  done

  param_index=1
  for param in "$@"
  do
    echo "Parameter $param_index:$param"
    param_index=$[ $param_index + 1 ] 
  done
}

# getopt         
#  ：   getopts         ，         ，  --           
#  ：   getopts   
#1.   set --     ，    ，    shift
#2.            -a -b dog -c "earth moon" -d -f param1 param2       

getopts_act()
{
  echo -e "
### getopts_act ###
"
  while getopts :ab:c:d ARGS
  do
  case $ARGS in 
    a)
      echo "Found the -a option"
      ;;
    b)
      echo "Found the -b option"
      echo "The parameter follow -b is $OPTARG"
      ;;
    c)
      echo "Found the -c option"
      echo "The parameter follow -c is $OPTARG"
      ;;
    d)
      echo "Found the -d option"
      ;;
     *)
       echo "Unknow option: $ARGS"
      ;;
  esac
  done

  shift $[ $OPTIND -1 ] 
  param_index=1
  for param in "$@"
  do
    echo "Parameter $param_index:$param"
    param_index=$[ $param_index + 1 ] 
  done
}

#getopts          
#  ：          ：-c "earth moon"
#                       ：-bdog
#                 ?  
#      Unknow option: ?

nomal_opts_act -a -b dog -c earth -d -f param1 param2
getopts_act -a -b dog -c "earth moon" -d -f param1 param2
getopt_act -a -b dog -c earth -d -f param1 param2