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SubjectRe: Async IO
In message <>,
Michael Eyrich writes:
> Negativ signal values are used to reach a process with all its childs
> i.e. a process group. Positiv signal values are used to reach exactly
> one process and the 0-signal is used to check if there is a process with
> this number ..

No, negative *pids* are used to signal a process group. (pid_t) -1
signals all processes whose real uid matches the effective uid of the
sender. I'm not sure what Posix has to say about the valid range of
signals, but I suspect it is probably limited.


Tim Wright, Worldwide Technical Services, | Email:
Sequent Computer Systems Inc., 15450, |
SW Koll Parkway, Beaverton, Oregon 97006 | Phone: +1-503-578-3822
"Applying computer technology is simply finding the right wrench to pound
in the correct screw"

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