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
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