1 /* $Id$ */
2
3 /*
4 * Copyright (c) 2006 Nicholas Marriott <nicholas.marriott@gmail.com>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <sys/types.h>
20
21 #include "fdm.h"
22
23 int
privsep_send(struct io * io,struct msg * msg,struct msgbuf * msgbuf)24 privsep_send(struct io *io, struct msg *msg, struct msgbuf *msgbuf)
25 {
26 char *cause;
27
28 msg->size = 0;
29 if (msgbuf != NULL && msgbuf->buf != NULL && msgbuf->len > 0)
30 msg->size = msgbuf->len;
31
32 io_write(io, msg, sizeof *msg);
33 if (io_flush(io, INFTIM, &cause) != 0)
34 return (-1);
35
36 if (msg->size != 0) {
37 io_write(io, msgbuf->buf, msgbuf->len);
38 if (io_flush(io, INFTIM, &cause) != 0)
39 return (-1);
40 }
41
42 return (0);
43 }
44
45 int
privsep_check(struct io * io)46 privsep_check(struct io *io)
47 {
48 return (IO_RDSIZE(io) >= sizeof (struct msg));
49 }
50
51 int
privsep_recv(struct io * io,struct msg * msg,struct msgbuf * msgbuf)52 privsep_recv(struct io *io, struct msg *msg, struct msgbuf *msgbuf)
53 {
54 char *tmpbuf;
55
56 if (msgbuf != NULL) {
57 msgbuf->buf = NULL;
58 msgbuf->len = 0;
59 }
60
61 if (io_wait(io, sizeof *msg, INFTIM, NULL) != 0)
62 return (-1);
63 if (io_read2(io, msg, sizeof *msg) != 0)
64 return (-1);
65
66 if (msg->size == 0)
67 return (0);
68
69 if (io_wait(io, msg->size, INFTIM, NULL) != 0)
70 return (-1);
71 if (msgbuf == NULL) {
72 if ((tmpbuf = io_read(io, msg->size)) == NULL)
73 return (-1);
74 xfree(tmpbuf);
75 } else {
76 if ((msgbuf->buf = io_read(io, msg->size)) == NULL)
77 return (-1);
78 msgbuf->len = msg->size;
79 }
80
81 return (0);
82 }
83