Hmmm, if I try to check if a process with a known pid exists I use to
use
``ps -p $PID''
... assuming shell.
If you are talking about C/C++ ... I'd have a look at the source code of
the shell command above. This should show something like your work
around below.
Regards
Frank
On Tue, 2005-03-01 at 02:17 -0600, Hareesh Nagarajan wrote:
> Hi,
>
> Can a process check if a given PID exists or not? In other words can a
> process check if an unrelated process is alive? Is there any system
> call that does this?
>
> I can think of a (few) work arounds to this:
>
> 1. open("/proc/pid_in_question") will return true if the process with
> pid = pid_in_question is alive.
>
> 2. lock a file called ``pid_in_question". Test the lock from the other
> process. If the process is dead then there is no lock on the file
> ``pid_in_question".
>
> Any ideas/comments?
>
> Thanks,
>
> Hareesh
> --
> gentoo-user@gentoo.org mailing list
>
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Frank Schafer
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T-Systems Czech s.r.o.
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