Re: Killing child tasks
Re: Killing child tasks
- Subject: Re: Killing child tasks
- From: Phillip Morelock <email@hidden>
- Date: Wed, 05 Jun 2002 12:14:32 -0700
On 6/5/02 4:07 AM, "Will Thimbleby" <email@hidden> wrote:
>
Hi,
>
>
I am using NSTasks to access other programs through standard
>
input/output. This all works, however if the user force-quits my
>
program, the tasks continue to run, unnoticed in the background using
>
processor power. Is there a way to ensure the child tasks are attached
>
to the main program so that when it exits the child tasks are forced to
>
exit as well.
<newbie who knows unix but not cocoa who probably shouldn't be giving
advice>
I am not sure if you can do this in a Cocoa program, but you can register a
signal handler (Unix-style, baby) for Unix apps and when the OS sends a kill
signal you will be able to run a routine. (Sort of like an interrupt
handler). see man kill and man sigaction for more information. Although I
don't know what signal gets sent when the cmd-opt-esc kill is used. Anyone?
I would keep a linked list of all the processes you've started, or something
like that...then you can just iterate the list and kill if necessary.
>
Also: Is there an easy way to get them to run as nice, so that other
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programs still have priority.
Probably --- I don't know NSTask but do you feed it a command string? Does
it get interpreted as a sh / tcsh expression? If so this shouldn't be too
hard. see man renice and man nice
>
Cheers
>
>
Will
fillup
>
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