shell getopts template

最新推荐文章于 2025-09-13 22:48:48 发布

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最新推荐文章于 2025-09-13 22:48:48 发布

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CC 4.0 BY-SA版权

文章标签： shell python

原文链接：https://my.oschina.net/zhiyonghe/blog/3013324

本文介绍了一个Bash脚本示例，展示了如何处理命令行参数并使用锁文件来防止脚本同时运行多次。该脚本通过getopts处理选项，并提供了版本和用法信息。如果检测到锁文件存在，则脚本会报告已有一个实例正在运行并退出。

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!/bin/bash
# ------------------------------------------------------------------
# [Author] Title
#          Description
# ------------------------------------------------------------------

SUBJECT=some-unique-id
VERSION=0.1.0
USAGE="Usage: command -hv args"

# --- Option processing --------------------------------------------
if [ $# == 0 ] ; then
    echo $USAGE
    exit 1;
fi

while getopts ":vh" optname
  do
    case "$optname" in
      "v")
        echo "Version $VERSION"
        exit 0;
        ;;
      "h")
        echo $USAGE
        exit 0;
        ;;
      "?")
        echo "Unknown option $OPTARG"
        exit 0;
        ;;
      ":")
        echo "No argument value for option $OPTARG"
        exit 0;
        ;;
      *)
        echo "Unknown error while processing options"
        exit 0;
        ;;
    esac
  done

shift $(($OPTIND - 1))

param1=$1
param2=$2
# -----------------------------------------------------------------

LOCK_FILE=/tmp/${SUBJECT}.lock

if [ -f "$LOCK_FILE" ]; then
echo "Script is already running"
exit
fi

# -----------------------------------------------------------------
trap "rm -f $LOCK_FILE" EXIT
touch $LOCK_FILE 

# -----------------------------------------------------------------
#  SCRIPT LOGIC GOES HERE
# -----------------------------------------------------------------

转载于:https://my.oschina.net/zhiyonghe/blog/3013324