shell,python,perl（面向过程） 面向对象：shell，
echo 'Must supply a parameter, exiting.' >&2 exit 1 ;; *) echo 'Unknown error, exiting.' >&2 exit $status esac
bash脚本退出代码解释 Exit Codes With Special Meanings Table E-1.ReservedExit Codes According to the above table, exit codes1 - 2, 126 - 165, and 255[1]have special meanings, and should therefore be avoided for user-specified exit parameters. Ending a script withexit 127would certainly cause...
soyuka commented on Feb 14, 2017 soyuka on Feb 14, 2017 Collaborator IMO it's just because you've a spawn and that pm2 also spawns: -- pm2 --- node index.js (process container) --- bash test.sh Perhaps the bash script is trying to exit (on error maybe), and isn't being ...
cd/foo ||exit1 bar baz bat ...# Lots of commands. 出错时,cd 命令会报告无法改变当前目录,同时将错误消息输出到标准错误,例如 "bash: cd: /foo: No such file or directory"。如果你想要在标准输出同时输出自定义的错误提示,可以使用复合命令(command grouping[17]): ...
Bash Pitfalls[1]文章介绍了 40 多条日常 Bash 编程中,老手和新手都容易忽略的错误编程习惯。每条作者在给出错误的范例上,详细分析与解释错误的原因,同时给出正确的改写建议。文中有不少引用的文章,也值得大家仔细阅读。仔细阅读了这篇文章后,收获很多,不感独享,把这篇文章以半翻译半笔记的形式分享给大家。
If the error is unrecoverable and you want to exit the script, choose this. This will give you the same effect as set -e, exiting at the error.echo Many long and complex actions false echo Many more long and complex actionsNote it exited after false, and the final echo statement never...
echo "$instances instance(s) of this script running." echo "[Hit Ctl-C to exit.]"; echo sleep 1 # 等一下. bash $0 # 再来一次, Sam. exit 0 # 没必要; 脚本永远不会运行到这里. # 为什么运行不到这里? # 在使用Ctl-C退出之后, ...
The if in a Bash script is a shell keyword that is used to test conditions based on the exit status of a test command. An exit status of zero, and only zero, is a success, i.e. a condition that is true. Any other exit status is a failure, i.e. a condition that is false. ...
Bash Script Returns with Different Return Codes on Exit Before moving out to the methods, let’s take a look at the exit codes that have specific meanings: How to Get Return Codes on Exit? You only need to write the “echo $?” command to get the return code. For example, you want...