svr4_ioctl.c revision 280258 
1/*-
2 * Copyright (c) 1998 Mark Newton
3 * Copyright (c) 1994 Christos Zoulas
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 *    derived from this software without specific prior written permission
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: stable/10/sys/compat/svr4/svr4_ioctl.c 280258 2015-03-19 13:37:36Z rwatson $");
31
32#include <sys/param.h>
33#include <sys/proc.h>
34#include <sys/capsicum.h>
35#include <sys/file.h>
36#include <sys/filedesc.h>
37#include <sys/fcntl.h>
38#include <sys/socket.h>
39#include <sys/socketvar.h>
40#include <sys/systm.h>
41
42#include <compat/svr4/svr4.h>
43#include <compat/svr4/svr4_types.h>
44#include <compat/svr4/svr4_util.h>
45#include <compat/svr4/svr4_signal.h>
46#include <compat/svr4/svr4_proto.h>
47#include <compat/svr4/svr4_stropts.h>
48#include <compat/svr4/svr4_ioctl.h>
49#include <compat/svr4/svr4_termios.h>
50#include <compat/svr4/svr4_filio.h>
51#include <compat/svr4/svr4_sockio.h>
52
53#ifdef DEBUG_SVR4
54static void svr4_decode_cmd(u_long, char *, char *, int *, int *);
55/*
56 * Decode an ioctl command symbolically
57 */
58static void
59svr4_decode_cmd(cmd, dir, c, num, argsiz)
60	u_long		  cmd;
61	char		 *dir, *c;
62	int		 *num, *argsiz;
63{
64	if (cmd & SVR4_IOC_VOID)
65		*dir++ = 'V';
66	if (cmd & SVR4_IOC_IN)
67		*dir++ = 'R';
68	if (cmd & SVR4_IOC_OUT)
69		*dir++ = 'W';
70	*dir = '\0';
71	if (cmd & SVR4_IOC_INOUT)
72		*argsiz = (cmd >> 16) & 0xff;
73	else
74		*argsiz = -1;
75
76	*c = (cmd >> 8) & 0xff;
77	*num = cmd & 0xff;
78}
79#endif
80
81int
82svr4_sys_ioctl(td, uap)
83	struct thread *td;
84	struct svr4_sys_ioctl_args *uap;
85{
86	int             *retval;
87	cap_rights_t	 rights;
88	struct file	*fp;
89	u_long		 cmd;
90	int (*fun)(struct file *, struct thread *, register_t *,
91			int, u_long, caddr_t);
92	int error;
93#ifdef DEBUG_SVR4
94	char		 dir[4];
95	char		 c;
96	int		 num;
97	int		 argsiz;
98
99	svr4_decode_cmd(uap->com, dir, &c, &num, &argsiz);
100
101	DPRINTF(("svr4_ioctl[%lx](%d, _IO%s(%c, %d, %d), %p);\n", uap->com, uap->fd,
102	    dir, c, num, argsiz, uap->data));
103#endif
104	retval = td->td_retval;
105	cmd = uap->com;
106
107	error = fget(td, uap->fd, cap_rights_init(&rights, CAP_IOCTL), &fp);
108	if (error != 0)
109		return (error);
110
111	if ((fp->f_flag & (FREAD | FWRITE)) == 0) {
112		fdrop(fp, td);
113		return EBADF;
114	}
115
116#if defined(DEBUG_SVR4)
117	if (fp->f_type == DTYPE_SOCKET) {
118	        struct socket *so = fp->f_data;
119		DPRINTF(("<<< IN: so_state = 0x%x\n", so->so_state));
120	}
121#endif
122
123	switch (cmd & 0xff00) {
124	case SVR4_TIOC:
125	        DPRINTF(("term\n"));
126		fun = svr4_term_ioctl;
127		break;
128
129	case SVR4_STR:
130	        DPRINTF(("stream\n"));
131		fun = svr4_stream_ioctl;
132		break;
133
134	case SVR4_FIOC:
135                DPRINTF(("file\n"));
136		fun = svr4_fil_ioctl;
137		break;
138
139	case SVR4_SIOC:
140	        DPRINTF(("socket\n"));
141		fun = svr4_sock_ioctl;
142		break;
143
144	case SVR4_XIOC:
145		/* We do not support those */
146		fdrop(fp, td);
147		return EINVAL;
148
149	default:
150		fdrop(fp, td);
151		DPRINTF(("Unimplemented ioctl %lx\n", cmd));
152		return 0;	/* XXX: really ENOSYS */
153	}
154#if defined(DEBUG_SVR4)
155	if (fp->f_type == DTYPE_SOCKET) {
156	        struct socket *so;
157
158	        so = fp->f_data;
159		DPRINTF((">>> OUT: so_state = 0x%x\n", so->so_state));
160	}
161#endif
162	error = (*fun)(fp, td, retval, uap->fd, cmd, uap->data);
163	fdrop(fp, td);
164	return (error);
165}
166