From mboxrd@z Thu Jan  1 00:00:00 1970
From: Prasanta Sadhukhan <Prasanta.Sadhukhan@Sun.COM>
Subject: Running status of a process
Date: Wed, 21 Mar 2007 13:43:21 +0530
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Hi,

Can anyone point as to how can I obtain the information whether a 
non-child process is still running?

I tried waitpid(pid, &status, WNOHANG) but always receive return value 
as -1 with errno as ECHILD.
Since the processes I am waiting for is not the child of this process 
from where I am calling waitpid() (ie, they are independant processes), 
it might be a valid error but what is the other alternative?

Regards
Prasanta