可以获取上一条命令的exit code。 但是如果bash脚本中设置了set -e,那么如果命令的exit code不为0,当前bash脚本会直接退出。这种情况下如果要获取命令的exit code而不退出,需要让该命令在一个新的shell中执行: set -e ret=$(bash -c 'bash test2.sh; echo $?') echo $ret...
if [ $exit_code -eq 0 ]; then echo “Command executed successfully” else echo “Command failed with exit code: $exit_code” fi “` 在这个例子中,我们使用了ls命令来示范。脚本首先执行ls命令,然后使用$?获取ls命令的返回值并将其赋值给变量exit_code。接下来,使用if语句判断exit_code的值,如果等于...
Use the "id" command to check if the user exists. If the user exists, the "id" command will return successfully (exit code 0), otherwise, it will return an error (exit code 1). Redirect the output of 'id' to /dev/null to suppress any output. In the main script: Check if there...
格式:trap "commands" EXIT 退出时执行commands指定的命令。( A trap on EXIT is executed before the shell terminates.) 退出码(exit status,或exit code)的约定: 0表示成功(Zero - Success) 非0表示失败(Non-Zero - Failure) 2表示用法不当(Incorrect Usage) 127表示命令没有找到(Command Not Found) 126...
问从bash中的后台进程获取exitcodeEN我有一个在后台执行命令的Bash脚本，可以在命令执行过程中显示一个...
To display the exit code for the last command you ran on the command line, use the following command: $echo$? The displayed response contains no pomp or circumstance. It's simply a number. You might also receive a shell error message from Bash further describing the error, but the exit ...
To display the exit code for the last command you ran on the command line, use the following command: $echo$? The displayed response contains no pomp or circumstance. It's simply a number. You might also receive a shell error message from Bash further describing the error, but the exit ...
An exit code or a return code results from a process executed on a shell in Linux/UNIX systems. Every Linux/UNIX command returns an exit status, which is represented by an exit code (a number ranging from 0 to 255). When a command returns an exit status “0,” it means the command...
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位运算逻辑运算echo $(( 0&&5 )) #有一个为零(false) 结果是0 echo $(( b && 5 )) # 其中b不是数字,为false 结果是 0 status code exit status(sometimes referred to as areturn statusorexit c…