Messages in this thread |  | | From | (Matthias Urlichs) | Subject | Re: Async IO | Date | 3 Feb 1997 16:29:36 +0100 |
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In linux.dev.kernel, article <199702030606.BAA00518@wolverine.hq.cic.net>, Jared Mauch <jared@wolverine.hq.cic.net> writes: > Signal 0 checks to see if the process exists. > > If it does, it returns success, if it doesn't, it returns > error. > Wrong.
If the process doesn't exist, it returns -1, errno == ESRCH.
If you aren't allowed to kill the process, you get EPERM.
If you are, you get zero.
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