svr4_ioctl.c revision 43412 
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/param.h>
30#include <sys/proc.h>
31#include <sys/systm.h>
32#include <sys/file.h>
33#include <sys/filedesc.h>
34#include <sys/unistd.h>
35#include <sys/fcntl.h>
36#include <sys/termios.h>
37#include <sys/tty.h>
38#include <sys/socket.h>
39#include <sys/socketvar.h>
40#include <sys/mount.h>
41#include <net/if.h>
42#include <sys/malloc.h>
43
44#include <sys/sysproto.h>
45
46#include <svr4/svr4.h>
47#include <svr4/svr4_types.h>
48#include <svr4/svr4_util.h>
49#include <svr4/svr4_signal.h>
50#include <svr4/svr4_proto.h>
51#include <svr4/svr4_stropts.h>
52#include <svr4/svr4_ioctl.h>
53#include <svr4/svr4_termios.h>
54#include <svr4/svr4_ttold.h>
55#include <svr4/svr4_filio.h>
56#include <svr4/svr4_sockio.h>
57
58#ifdef DEBUG_SVR4
59static void svr4_decode_cmd __P((u_long, char *, char *, int *, int *));
60/*
61 * Decode an ioctl command symbolically
62 */
63static void
64svr4_decode_cmd(cmd, dir, c, num, argsiz)
65	u_long		  cmd;
66	char		 *dir, *c;
67	int		 *num, *argsiz;
68{
69	if (cmd & SVR4_IOC_VOID)
70		*dir++ = 'V';
71	if (cmd & SVR4_IOC_IN)
72		*dir++ = 'R';
73	if (cmd & SVR4_IOC_OUT)
74		*dir++ = 'W';
75	*dir = '\0';
76	if (cmd & SVR4_IOC_INOUT)
77		*argsiz = (cmd >> 16) & 0xff;
78	else
79		*argsiz = -1;
80
81	*c = (cmd >> 8) & 0xff;
82	*num = cmd & 0xff;
83}
84#endif
85
86int
87svr4_sys_ioctl(p, uap)
88	register struct proc *p;
89	struct svr4_sys_ioctl_args *uap;
90{
91	int             *retval;
92	struct file	*fp;
93	struct filedesc	*fdp;
94	u_long		 cmd;
95	int (*fun) __P((struct file *, struct proc *, register_t *,
96			int, u_long, caddr_t));
97#ifdef DEBUG_SVR4
98	char		 dir[4];
99	char		 c;
100	int		 num;
101	int		 argsiz;
102
103	svr4_decode_cmd(SCARG(uap, com), dir, &c, &num, &argsiz);
104
105	DPRINTF(("svr4_ioctl[%x](%d, _IO%s(%c, %d, %d), %p);\n", SCARG(uap, com), SCARG(uap, fd),
106	    dir, c, num, argsiz, SCARG(uap, data)));
107#endif
108	retval = p->p_retval;
109	fdp = p->p_fd;
110	cmd = SCARG(uap, com);
111
112	if ((u_int)SCARG(uap, fd) >= fdp->fd_nfiles ||
113	    (fp = fdp->fd_ofiles[SCARG(uap, fd)]) == NULL)
114		return EBADF;
115
116	if ((fp->f_flag & (FREAD | FWRITE)) == 0)
117		return EBADF;
118
119#if defined(DEBUG_SVR4)
120	if (fp->f_type == DTYPE_SOCKET) {
121	        struct socket *so = fp->f_data;
122		DPRINTF(("<<< IN: so_state = 0x%x\n", so->so_state));
123	}
124#endif
125
126	switch (cmd & 0xff00) {
127	case SVR4_tIOC:
128	        DPRINTF(("ttold\n"));
129		fun = svr4_ttold_ioctl;
130		break;
131
132	case SVR4_TIOC:
133	        DPRINTF(("term\n"));
134		fun = svr4_term_ioctl;
135		break;
136
137	case SVR4_STR:
138	        DPRINTF(("stream\n"));
139		fun = svr4_stream_ioctl;
140		break;
141
142	case SVR4_FIOC:
143                DPRINTF(("file\n"));
144		fun = svr4_fil_ioctl;
145		break;
146
147	case SVR4_SIOC:
148	        DPRINTF(("socket\n"));
149		fun = svr4_sock_ioctl;
150		break;
151
152	case SVR4_XIOC:
153		/* We do not support those */
154		return EINVAL;
155
156	default:
157		DPRINTF(("Unimplemented ioctl %lx\n", cmd));
158		return 0;	/* XXX: really ENOSYS */
159	}
160#if defined(DEBUG_SVR4)
161	if (fp->f_type == DTYPE_SOCKET) {
162	        struct socket *so = fp->f_data;
163		DPRINTF((">>> OUT: so_state = 0x%x\n", so->so_state));
164	}
165#endif
166	return (*fun)(fp, p, retval, SCARG(uap, fd), cmd, SCARG(uap, data));
167}
168