I'm using NSTask to execute a series of long running commands like so:
commandToRun = @"command 1;command2";
NSArray *arguments = [NSArray arrayWithObjects:
@"-c",
commandToRun,
nil];
self.task = [[NSTask alloc] init];
[self.task setLaunchPath: @"/bin/sh"];
[self.task setArguments: arguments];
[self.task launch];
This creates a process for the shell, and a child process for whichever command is running at the time (command 1 or command 2). If I kill the task with [self.task terminate]
it only kills the parent process. Is there a way to identify and kill the children too?
It's not exactly elegant, but you can make
sh
launch the subtasks as background processes and then write their PIDs to a file using the shell variable$!
as per here, blocking till each background process completes to maintain asynchronicity:Then when you call
...or something equivalent.[self.task terminate]
you should also invoke: