1 /*-
2 * Copyright (c) 1995 Steven Wallace
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. The name of the author may not be used to endorse or promote products
11 * derived from this software without specific prior written permission
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25 #include <sys/cdefs.h>
26 __FBSDID("$FreeBSD: releng/6.0/sys/i386/ibcs2/ibcs2_msg.c 142504 2005-02-25 20:15:11Z sam $");
27
28 /*
29 * IBCS2 message compatibility module.
30 *
31 */
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/syscallsubr.h>
36 #include <sys/sysproto.h>
37
38 #include <i386/ibcs2/ibcs2_types.h>
39 #include <i386/ibcs2/ibcs2_signal.h>
40 #include <i386/ibcs2/ibcs2_util.h>
41 #include <i386/ibcs2/ibcs2_poll.h>
42 #include <i386/ibcs2/ibcs2_proto.h>
43
44
45 int
46 ibcs2_getmsg(td, uap)
47 struct thread *td;
48 struct ibcs2_getmsg_args *uap;
49 {
50 return 0; /* fake */
51 }
52
53 int
54 ibcs2_putmsg(td, uap)
55 struct thread *td;
56 struct ibcs2_putmsg_args *uap;
57 {
58 return 0; /* fake */
59 }
60
61
62 int
63 ibcs2_poll(td, uap)
64 struct thread *td;
65 struct ibcs2_poll_args *uap;
66 {
67 int error, i, nfds;
68 fd_set *readfds, *writefds, *exceptfds;
69 struct timeval timeout, *tp;
70 struct ibcs2_poll conv;
71 caddr_t sg = stackgap_init();
72
73 if (uap->nfds > FD_SETSIZE)
74 return EINVAL;
75 readfds = stackgap_alloc(&sg, sizeof(fd_set *));
76 writefds = stackgap_alloc(&sg, sizeof(fd_set *));
77 exceptfds = stackgap_alloc(&sg, sizeof(fd_set *));
78
79 FD_ZERO(readfds);
80 FD_ZERO(writefds);
81 FD_ZERO(exceptfds);
82 if (uap->timeout == -1)
83 tp = NULL;
84 else {
85 timeout.tv_usec = (uap->timeout % 1000)*1000;
86 timeout.tv_sec = uap->timeout / 1000;
87 tp = &timeout;
88 }
89
90 nfds = 0;
91 for (i = 0; i < uap->nfds; i++) {
92 if ((error = copyin(uap->fds + i*sizeof(struct ibcs2_poll),
93 &conv, sizeof(conv))) != 0)
94 return error;
95 conv.revents = 0;
96 if (conv.fd < 0 || conv.fd >= FD_SETSIZE)
97 continue;
98 if (conv.fd >= nfds)
99 nfds = conv.fd + 1;
100 if (conv.events & IBCS2_READPOLL)
101 FD_SET(conv.fd, readfds);
102 if (conv.events & IBCS2_WRITEPOLL)
103 FD_SET(conv.fd, writefds);
104 FD_SET(conv.fd, exceptfds);
105 }
106 error = kern_select(td, nfds, readfds, writefds, exceptfds, tp);
107 if (error != 0)
108 return error;
109 if (td->td_retval[0] == 0)
110 return 0;
111 td->td_retval[0] = 0;
112 for (td->td_retval[0] = 0, i = 0; i < uap->nfds; i++) {
113 copyin(uap->fds + i*sizeof(struct ibcs2_poll),
114 &conv, sizeof(conv));
115 conv.revents = 0;
116 if (conv.fd < 0 || conv.fd > FD_SETSIZE)
117 /* should check for open as well */
118 conv.revents |= IBCS2_POLLNVAL;
119 else {
120 if (FD_ISSET(conv.fd, readfds))
121 conv.revents |= IBCS2_POLLIN;
122 if (FD_ISSET(conv.fd, writefds))
123 conv.revents |= IBCS2_POLLOUT;
124 if (FD_ISSET(conv.fd, exceptfds))
125 conv.revents |= IBCS2_POLLERR;
126 if (conv.revents)
127 ++td->td_retval[0];
128 }
129 if ((error = copyout(&conv,
130 uap->fds + i*sizeof(struct ibcs2_poll),
131 sizeof(conv))) != 0)
132 return error;
133 }
134 return 0;
135 }
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