Date: Tue, 29 Sep 1998 11:46:32 +0200 (SAT) From: Graham Wheeler <gram@cdsec.com> To: tlambert@primenet.com (Terry Lambert) Cc: hackers@FreeBSD.ORG Subject: Re: The inetd realloc problem: an observation Message-ID: <199809290946.LAA00495@cdsec.com> In-Reply-To: <199809282156.OAA07483@usr04.primenet.com> from "Terry Lambert" at Sep 28, 98 09:56:22 pm
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>
> > So far it seems to be working fine. My approach was not as sophisticated as
> > the one suggested by others (writing values into a pipe). I just changed
> > each handler to set a volatile int variable, modified the main select() to
> > use a 60 second timeout, and before the select, did a:
> >
> > while (any signal handler flag set)
> > {
> > if (sigchld_flag) { sigchld_flag = 0; do_old_sigchld_handler(); }
> > ...
> > }
> >
> > It may be possible that this is vulnerable to race conditions, but thus
> > far it has been working fine.
>
> If you don't have call restart, then you don't need the timeout
> (select will return -1 with an errno of EINTR). If you do this,
The timeout is necessary in case a signal happens after exiting the above
loop but before the call to select.
--
Dr Graham Wheeler E-mail: gram@cdsec.com
Citadel Data Security Phone: +27(21)23-6065/6/7
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