Messages in this thread |  | | Date | Fri, 5 Oct 2001 11:36:28 +0200 (MET DST) | From | "Mattias Engdegård" <> | Subject | Re: [PATCH][RFC] Pollable /proc/<pid>/ - avoid SIGCHLD/poll() races |
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Paul Menage <pmenage@ensim.com> wrote: >Except that this enhancement is not completely safe, as if you get more >than 1024 children reaped (assuming you send two bytes of pid and two >bytes of status) between checks of the pipe, you'll lose notifications.
Obviously, but the cases where the number of children is bounded below 1024 are rather frequent
>At least if you're only using the pipe to stop select() from blocking, >you don't care about overflowing the pipe as there's no important >information in there anyway.
sure, but then you have to put the pid/exit status somewhere else and do some signal blocking/unblocking. In either case, it's portable, which polling on /proc/pid isn't
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