What is $sig in posix_kill()?

[forumforme123]

Hi,

 

I am trying to kill my process via pid with the function posix_kill.

However, I am not sure what is an int $sig for the second parameter?

I'm putting various number in it, from 0 - 3, and it still works, I think.

Coz I'm not getting any error back.

Any light on this is appreciated.

 

Thanks

[oni-kun]

http://linux.die.net/man/7/signal

 

How is this a PHP question?

[forumforme123]

 

posix_kill() is a php function.

 

Link: http://php.net/manual/en/function.posix-kill.php

 

but I don't get what int $sig (the 2nd parameter) is.

[forumforme123]

 

Ah, nvm. I think I got it.

The int $sig refers to the type of signal.

Thanks for the link.

 

Can anyone confirm?

[oni-kun]

I can confirm as a linux developer, but, As it seems you're learning, lets read the documentation you linked to before you require further information:

 

pid: The process identifier.

sig: One of the PCNTL signals constants.

 

Wasn't that hard? And no, POSIX is not a PHP question (Only POSIX related structures within the languages, such as POSIX Regular expressions which are deprecated in trunk) which are part of the framework. It's the same answer you'll get when asking how to use system on a foreign command.

 

[forumforme123]

 

pid: The process identifier.

sig: One of the PCNTL signals constants.

 

That's the one about the sig that I didn't understand. Yes, it was that hard for me.

Thanks for your explanation. I really appreciate it.

Now I just hope I can successfully kill a process.

[oni-kun]

Alright. If you're not aware of how *nix commands its processes, you can look at these:

http://en.wikipedia.org/wiki/SIGKILL

http://en.wikipedia.org/wiki/SIGTERM

 

For example SIGTERM will be constant 15, So you should use it with your POSIX command. On a linux kernel the command "top" would allow you to view processes, You can choose to kill, terminate, or deprecate a open/halted/zombie process and basically it's a just level of command. Terminating will "tell" the command to quit, killing it will force it to terminate no matter what it's doing.

 

This question is off topic, There's no need to answer further.