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How do I find the process exit code in Linux?
To check the exit code we can simply print the $? special variable in bash. This variable will print the exit code of the last run command.
What does exit do in bash?
Bash provides a command to exit a script if errors occur, the exit command. The argument N (exit status) can be passed to the exit command to indicate if a script is executed successfully (N = 0) or unsuccessfully (N != 0). If N is omitted the exit command takes the exit status of the last command executed.
How to get the exit code of a background process?
It can be done by kill -0 built-in (universal) or checking the existence of /proc/ directory (Linux specific) or using the jobs built-in ( bash specific. jobs -l also reports the pid. In this case the 3rd field of the output can be Stopped|Running|Done|Exit .
How to kill background processes / jobs when my shell script exits?
Another option is it to have the script set itself as the process group leader, and trap a killpg on your process group on exit. jobs -p does not work in all shells if called in a sub-shell, possibly unless its output is redirected into a file but not a pipe.
When do you use the exit code value?
If you use the exit code value to make decisions in your code, be sure that you know the exit code convention used by the application process. Developers usually indicate a successful exit by an ExitCode value of zero, and designate errors by nonzero values that the calling method can use to identify the cause of an abnormal process termination.
What does process.exitcode do in Microsoft Docs?
System. Diagnostics Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here. Gets the value that the associated process specified when it terminated.