C++ (Cpp) fork_blocking_child Examples

Example #1

File: work_fork.c Project: credil/ntp

void
fork_deferred_worker(void)
{
	u_int			idx;
	blocking_child *	c;

	REQUIRE(droproot && root_dropped);

	for (idx = 0; idx < blocking_children_alloc; idx++) {
		c = blocking_children[idx];
		if (NULL == c)
			continue;
		if (-1 != c->req_write_pipe && 0 == c->pid)
			fork_blocking_child(c);
	}
}

Example #2

File: work_fork.c Project: kwitaszczyk/freebsd

int
send_blocking_req_internal(
	blocking_child *	c,
	blocking_pipe_header *	hdr,
	void *			data
	)
{
	int octets;
	int rc;

	DEBUG_REQUIRE(hdr != NULL);
	DEBUG_REQUIRE(data != NULL);
	DEBUG_REQUIRE(BLOCKING_REQ_MAGIC == hdr->magic_sig);

	if (-1 == c->req_write_pipe) {
		fork_blocking_child(c);
		DEBUG_INSIST(-1 != c->req_write_pipe);
	}

	octets = sizeof(*hdr);
	rc = write(c->req_write_pipe, hdr, octets);

	if (rc == octets) {
		octets = hdr->octets - sizeof(*hdr);
		rc = write(c->req_write_pipe, data, octets);

		if (rc == octets)
			return 0;
	}

	if (rc < 0)
		msyslog(LOG_ERR,
			"send_blocking_req_internal: pipe write: %m");
	else
		msyslog(LOG_ERR,
			"send_blocking_req_internal: short write %d of %d",
			rc, octets);

	/* Fatal error.  Clean up the child process.  */
	req_child_exit(c);
	exit(1);	/* otherwise would be return -1 */
}