After getopt has returned -1, the global variable optind holds the index of the first argument that was not part of the command-line options.

getopt返回- 1后，全局变量optind保存第一个不属于命令行选项的参数的索引。

youdao

The showopts function analyzes the options as before, but USES the return statement to return the value of the OPTIND variable to the calling statement.

showopts函数像以前一样分析选项，但是使用return语句将OPTIND变量的值返回给调用语句。

youdao

You will need to reset OPTIND to 1 yourself if you call getopts for a new set of arguments in a script where you have already used it with other arguments.

如果您在脚本中已经使用一组参数调用了getopts，现在要用另一组参数来调用它，则需要亲自将OPTIND重置为1。

youdao