./mycommand.shEXCODE=$?if["$EXCODE"=="0"];then echo"O.K"fi 注意:该命令是bash内建命令,相关的帮助信息请查看help命令。 expand 补充说明 expand命令用于将文件的制表符(TAB)转换为空白字符(space),将结果显示到标准输出设备。 语法 代码语言:javascript ...
The first exit command sets the exit status of the script in case of failure (exit value as 1). The second exit command is a formal expression. This means that when the script completes its execution to the end, it has the exit status of the last command which, in this case, is the...
./mycommand.shEXCODE=$?if["$EXCODE"=="0"];then echo"O.K"fi 注意 该命令是bash内建命令,相关的帮助信息请查看help命令。 本文参与腾讯云自媒体同步曝光计划,分享自作者个人站点/博客。 原始发表:2024-02-29,如有侵权请联系cloudcommunity@tencent.com删除 ...
Exit status 127 tells you that one of two things has happened: Either the command doesn't exist, or the command isn't in your path ($PATH). This code also appears if you attempt to execute a command that is in your current working directory. For example, the script above that you ga...
linuxscript ifexit LinuxScript中的if语句是编写脚本时经常用到的控制语句之一。它允许我们根据条件来执行不同的操作,从而实现程序的灵活控制。在编写Linux脚本时,掌握if语句的用法是非常重要的。 在Linux环境下,使用if语句可以非常方便地进行条件判断。在脚本中,我们可以使用if、elif和else等关键词来实现根据条件执行...
Write a Bash script that executes a command and prints its exit status code.Code:#!/bin/bash # Command to execute command_to_execute="ls /new_dir" # Execute the command $command_to_execute # Get the exit status code exit_status=$? # Print the exit status code echo "Exit status ...
概念:return value(返回值)我们在shell下执行的每一个command 或 function ,在结束的时候都会传回父行程一个值,这个值成为return value。在shell下可以用 $? 这个变量得到“最新”的一个 return value,即刚结束的那个形成传回的值。Return Value(RV) 的取值为 0-255 之间,由程序(或script)的作者自行定义(可以...
Every command in bash returns an exit status, which is an integer between 0 and 255 that represents whether the command succeeded or failed, and if it failed, what kind of error occurred. Functions also can return an exit status via thereturnkeyword. The exit status can be checked using ba...
command. If you wish to output the exit status, it can be done by: # your command here testVal=$? echo testVal We know that non-zero exit codes are used to report errors. If we want to check for errors in general, we can write a small script with the command in question and ...
2.2. The Behaviour of theexitCommand When Executing vs. When Sourcing Moving on, let’s see what happens if we have an exit command in the script: #!/bin/bash ps -f exit echo We should not see this Executing the script provides the same result as before: ...