Re: pid_t data type

"jason.cipriani@xxxxxxxxx" <jason.cipriani@xxxxxxxxx> writes:

On Mar 18, 5:48 am, Rainer Weikusat <rweiku...@xxxxxxxxxxx> wrote:
[snip]

Does it say somewhere that pid_t will never be a pointer type, or some
other type, like a float (which, while strange, is fine since it's
hidden behind the typedef)? If it can be, then the discussion of using
longs or whatever interchangeably with pid_t's is moot.

It needs to be a signed airthmetic type:

If pid is negative but not (pid_t)-1, sig will be sent to
all processes whose process group ID is equal to the abso-
lute value of pid and for which the process has permission
to send a signal.

Since it needs to be used in comparisons it can't really be float...

Casper
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