Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞
Shell command line parameter note 1. getopts can write scripts to make it easier to control multiple command line parameters, for example, file get. sh #! /Bin/shNAMEfalseAGEfalseODDfalseSEXfalsewhilegetopts: nao: s: argdocase $ arginn )... shell command line parameter note 1. getopts can write scripts to make it easier to control multiple command line parameters, such as file get. sh #! /Bin/shNAME = falseAGE = falseODD = falseSEX = false while getopts: nao: s: arg do case $ arg in n) echo 'name is true';) echo 'age is true'; o) echo 'Oss is '$ OPTARG; s) echo 'sex is' $ OPTARG; *) echo 'default ';; esac done uses getopts to set the n, a, o, and s options, so that sh get. sh-n directly outputs name is true. Therefore, getopts provides command parameters. to pass a value after a parameter, add ":" After the parameter, such as na: OS: When you select a parameter, the system will ask you to provide the value; otherwise, a warning will be given: get. sh: option requires an argument -- o is actually a parameter. if you do not want to prompt this warning or use your own prompt, add ":" Before naos to have the value yes, we should use $ OPTARG to get the value we entered, and when we set the options, we should try to use the same system options to ensure that they meet everyone's normal usage habits.
This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or
reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or
complaint, to email@example.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
and provide relevant evidence. A staff member will contact you within 5 working days.