Quit a running command based on output in bash

问题

I have a process which I start running using

$ somecommand build

It basically installs an app on an Android emulator and then starts up the emulator. This process keeps running forever until i manually kill it.

This command outputs a bunch of debug info into the terminal, also while running the app. I'd like to kill the command when somewhere in this continuous output, the string [TESTS_ENDED] has been outputted on the terminal.

Any oneliner on how to do this?

回答1:

Using awk, with help from pkill:

somecommand build | awk '/\[TESTS_ENDED\]/ {system("pkill somecommand")}'

• Assuming only one instance of somecommand is runnning

• \[TESTS_ENDED\] matches [TESTS_ENDED] in the line

• If matched, {system("pkill somecommand")} will be run i.e. awk will use system() function to run pkill somecommand i.e. somecommand will be killed by pkill

来源：https://stackoverflow.com/questions/40762233/quit-a-running-command-based-on-output-in-bash