Re: Running status of a process

[Prasanta Sadhukhan <Prasanta.Sadhukhan@Sun.COM>]

Steve Graegert wrote:

> Prasanta,
>
> On 3/21/07, Prasanta Sadhukhan <Prasanta.Sadhukhan@sun.com> wrote:
>
>> Hi,
>>
>> Can anyone point as to how can I obtain the information whether a
>> non-child process is still running?
>
>
> If you know the PID of the process you want to obtain the status of
> use the kill(2) system call.  The second argument should be 0 (zero)
> to prevent a signal from being sent to the process.  If the process
> exists kill(2) returns zero, or -1 otherwise.
>
> kill(2) can indicate various errors, but an error or EPERM usually is
> an indicator that the process exists, while all others indicate that
> it does not.
>
> If you're writing for systems supporting the /proc filesystem,
> checking for existence of /proc/{pid} is an alternative.
>
> If you don't know the PID you're out of luck, unless you make use of
> the /proc filesystem again, which is not portable per se.

thanks steve, found the solution.. I guess my mail crossed yours in the path

Prasanta

>
>     \Steve
>
> -- 
>
> Steve Grägert <steve@graegert.com>
> Jabber    xmpp://graegerts@jabber.org
> Internet  http://eth0.graegert.com, http://blog.graegert.co
> m



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