svn commit: r252603 - head/usr.sbin/rwhod

[Hiroki Sato]

Pawel Jakub Dawidek <pjd at FreeBSD.org> wrote
  in <201307032104.r63L4KEE015937 at svn.freebsd.org>:

pj> Author: pjd
pj> Date: Wed Jul  3 21:04:20 2013
pj> New Revision: 252603
pj> URL: http://svnweb.freebsd.org/changeset/base/252603
pj>
pj> Log:
pj>   The whole sending functionality was implemented within signal handler,
pj>   which is very bad idea. Split sending and receiving in two processes,
pj>   which fixes this problem and will help to sandbox rwhod.
pj>
pj>   Submitted by:	Mariusz Zaborski <oshogbo at FreeBSD.org>
pj>   Sponsored by:	Google Summer of Code 2013
pj>   Reviewed by:	pjd
pj>   MFC after:	1 month

(snip)

pj>  	if (!quiet_mode) {
pj> -		signal(SIGALRM, onalrm);
pj> -		onalrm(0);
pj> +		pid_child_receiver = pdfork(&fdp, 0);
pj> +		if (pid_child_receiver == 0) {
pj> +			receiver_process();
pj> +		} else if (pid_child_receiver > 0) {
pj> +			sender_process();
pj> +		} else if (pid_child_receiver == -1) {
pj> +			syslog(LOG_ERR, "pdfork: %m");
pj> +			exit(1);
pj> +		}

 pdfork() is available only when options PROCDESC is defined and
 GENERIC does not have it.

-- Hiroki
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