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From: pfalstad@phoenix.Princeton.EDU (Paul Falstad)
Newsgroups: comp.unix.questions
Subject: Re: "Monitoring" a process
Message-ID: <5569@idunno.Princeton.EDU>
Date: 22 Jan 91 07:53:31 GMT
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rickc@telly.on.ca (Rick Copley) wrote:
>Can anyone out there tell me how to tell if a given process is actually
>doing any thing (ie accumulating cpu time) from within a C program ??
>
>I realize I could muck around with the ps -t command and capture the cpu time
>in a file and compare it to a few minutes ago and stuff like that, but it seems
>like there should be a REALLY easy way to check if a process is "running" and 
>accumulating cpu time.

Yes, there should be, but there isn't.  You need to read /vmunix's name
list, open /dev/kmem, and traverse the kernal process table.  It's not
pretty at all.  Reading the output of some variant of ps is probably the
easiest solution in this case.

--
Paul Falstad, pfalstad@phoenix.princeton.edu PLink:HYPNOS GEnie:P.FALSTAD
In the heat of composition I find that I have inadvertently allowed
myself to assume the form of a large centipede.  I am accordingly
dictating the rest to my secretary.