1 /*
2  * Copyright (c) 2021, 2024 Omar Polo <op@omarpolo.com>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include "compat.h"
18 
19 #include "ev.h"
20 #include "imsgev.h"
21 
22 void
23 imsg_event_add(struct imsgev *iev)
24 {
25 	iev->events = EV_READ;
26 	if (iev->ibuf.w.queued)
27 		iev->events |= EV_WRITE;
28 
29 	ev_add(iev->ibuf.fd, iev->events, iev->handler, iev);
30 }
31 
32 int
33 imsg_compose_event(struct imsgev *iev, uint16_t type, uint32_t peerid,
34     pid_t pid, int fd, const void *data, uint16_t datalen)
35 {
36 	int	ret;
37 
38 	if ((ret = imsg_compose(&iev->ibuf, type, peerid, pid, fd, data,
39 	    datalen) != -1))
40 		imsg_event_add(iev);
41 
42 	return ret;
43 }
44 
45 int
46 ibuf_borrow_str(struct ibuf *ibuf, char **data)
47 {
48 	size_t		 len;
49 
50 	if ((*data = ibuf_data(ibuf)) == NULL ||
51 	    (len = ibuf_size(ibuf)) == 0 ||
52 	    (*data)[len - 1] != '\0')
53 		return -1;
54 	return 0;
55 }