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Changeset 10308

Timestamp:

07/07/08 13:24:50 (5 months ago)

Author:

vboxsync

Message:

Additions/common: update comments in VbglR3Daemonize

Files:

r8155	r10308
131	131	* Fork the child process and quit the parent.
132	132	*
133		* On Linux we'll fork once more at the end of it all just to be sure that
134		* we're not leaving any zombies behind. The SIGHUP stuff is ignored because
135		* the parent may throw us one before we get to the setsid stuff one some
136		* systems (BSD).
	133	* This means:
	134	* - fork once and become session leader (using setsid(2)) in
	135	* order to detach from the controlling tty and make ourselves safe
	136	* from Ctrl-C. The fork is required because the call to setsid will
	137	* fail if we were already session leader.
	138	* - On Linux, fork again in order to become a non-leader member of the
	139	* session, as the leader will attach to any tty it opens, accidentally
	140	* or otherwise (Sys V sematics).
	141	* - The SIGHUP stuff is ignored because the parent may throw us one
	142	* before we get to the setsid stuff one some systems (BSD).
137	143	*/
138	144	struct sigaction OldSigAct;
…	…
191	197	# ifdef RT_OS_LINUX
192	198	/*
193		* And fork again to avoid zomibies and stuff (non-standard daemon() behaviour).
	199	* And fork again to lose session leader status (non-standard daemon()
	200	* behaviour).
194	201	*/
195	202	pid = fork();