Re: Killing child tasks
Re: Killing child tasks
- Subject: Re: Killing child tasks
- From: email@hidden
- Date: Wed, 5 Jun 2002 15:22:52 -0400
I'm pretty sure it's SIGINT.
Owen Anderson
On Wednesday, June 5, 2002, at 03:14 PM, Phillip Morelock wrote:
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
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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