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Bash: kill process and all subprocesses without using group id

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1

TL;DR, I need a way to kill a process and all descendant processes, without killing siblings with the same group id, without output printed in the terminal, and with a non-zero exit code.

I have a bash script which is spawning child processes, which spawn grandchild and great grandchild processes.

I want to kill a particular child, and all it's descendants, without using sudo.

Here are some solutions I've tried that don't work for me:

1. Killing via group id. The child may have sibling processes with the same group id I do not want to kill.




2. Using kill $childpid. This is not killing all grandchildren and great grandchildren processes




3. Using kill -9 $childpid. This leads to text output in terminal that I ran the script from, which is not ideal, even if the script and the kill command both have their stdout and stderr routed to a different file




4. Using pkill -P $childpid. This seems to do what I want at first, but the child process exits with exit code zero. The parent process needs to know its child was killed prematurely, so I need it to exit with a code other than 0

What is the best way to do this?

Edit: my post has been flagged as a possible duplicate, but all solutions in those links have one of the issues I describe in my post

bash shell-script process job-control jobs

share|improve this question

edited 7 mins ago

quantumbutterfly

asked yesterday

quantumbutterflyquantumbutterfly

11133 bronze badges

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Possible duplicate of Kill all descendant processes
  
  – Bart
  yesterday
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  and related: unix.stackexchange.com/questions/14815/process-descendants/… unix.stackexchange.com/questions/124127/…
  
  – Bart
  yesterday
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  I see this has also been asked at stackoverflow.com/questions/57491869/… It's probably best to remove the question from one of the sites as cross-posted questions are closed on Unix & Linux.
  
  – Anthony Geoghegan
  yesterday
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Bart Seems like all the solutions in those threads have one of the 4 issues I address in my post
  
  – quantumbutterfly
  6 mins ago
  

  
  
  
  

add a comment | 

1

TL;DR, I need a way to kill a process and all descendant processes, without killing siblings with the same group id, without output printed in the terminal, and with a non-zero exit code.

I have a bash script which is spawning child processes, which spawn grandchild and great grandchild processes.

I want to kill a particular child, and all it's descendants, without using sudo.

Here are some solutions I've tried that don't work for me:

1. Killing via group id. The child may have sibling processes with the same group id I do not want to kill.




2. Using kill $childpid. This is not killing all grandchildren and great grandchildren processes




3. Using kill -9 $childpid. This leads to text output in terminal that I ran the script from, which is not ideal, even if the script and the kill command both have their stdout and stderr routed to a different file




4. Using pkill -P $childpid. This seems to do what I want at first, but the child process exits with exit code zero. The parent process needs to know its child was killed prematurely, so I need it to exit with a code other than 0

What is the best way to do this?

Edit: my post has been flagged as a possible duplicate, but all solutions in those links have one of the issues I describe in my post

bash shell-script process job-control jobs

share|improve this question

edited 7 mins ago

quantumbutterfly

asked yesterday

quantumbutterflyquantumbutterfly

11133 bronze badges

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Possible duplicate of Kill all descendant processes
  
  – Bart
  yesterday
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  and related: unix.stackexchange.com/questions/14815/process-descendants/… unix.stackexchange.com/questions/124127/…
  
  – Bart
  yesterday
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  I see this has also been asked at stackoverflow.com/questions/57491869/… It's probably best to remove the question from one of the sites as cross-posted questions are closed on Unix & Linux.
  
  – Anthony Geoghegan
  yesterday
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Bart Seems like all the solutions in those threads have one of the 4 issues I address in my post
  
  – quantumbutterfly
  6 mins ago
  

  
  
  
  

add a comment | 

TL;DR, I need a way to kill a process and all descendant processes, without killing siblings with the same group id, without output printed in the terminal, and with a non-zero exit code.

I have a bash script which is spawning child processes, which spawn grandchild and great grandchild processes.

I want to kill a particular child, and all it's descendants, without using sudo.

Here are some solutions I've tried that don't work for me:

1. Killing via group id. The child may have sibling processes with the same group id I do not want to kill.




2. Using kill $childpid. This is not killing all grandchildren and great grandchildren processes




3. Using kill -9 $childpid. This leads to text output in terminal that I ran the script from, which is not ideal, even if the script and the kill command both have their stdout and stderr routed to a different file




4. Using pkill -P $childpid. This seems to do what I want at first, but the child process exits with exit code zero. The parent process needs to know its child was killed prematurely, so I need it to exit with a code other than 0

What is the best way to do this?

Edit: my post has been flagged as a possible duplicate, but all solutions in those links have one of the issues I describe in my post

bash shell-script process job-control jobs

share|improve this question

edited 7 mins ago

quantumbutterfly

asked yesterday

quantumbutterflyquantumbutterfly

11133 bronze badges

share|improve this question

edited 7 mins ago

quantumbutterfly

asked yesterday

quantumbutterflyquantumbutterfly

11133 bronze badges

share|improve this question

edited 7 mins ago

quantumbutterfly

asked yesterday

quantumbutterflyquantumbutterfly

11133 bronze badges

asked yesterday

quantumbutterflyquantumbutterfly

11133 bronze badges

asked yesterday

quantumbutterflyquantumbutterfly

11133 bronze badges