tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * irixioctl.c: A fucking mess...
3 *
4 * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
5 */
6
7#include <linux/kernel.h>
8#include <linux/sched.h>
9#include <linux/fs.h>
10#include <linux/mm.h>
11#include <linux/smp.h>
12#include <linux/sockios.h>
13#include <linux/syscalls.h>
14#include <linux/tty.h>
15#include <linux/file.h>
16#include <linux/rcupdate.h>
17
18#include <asm/uaccess.h>
19#include <asm/ioctl.h>
20#include <asm/ioctls.h>
21
22#undef DEBUG_IOCTLS
23#undef DEBUG_MISSING_IOCTL
24
25struct irix_termios {
26 tcflag_t c_iflag, c_oflag, c_cflag, c_lflag;
27 cc_t c_cc[NCCS];
28};
29
30extern void start_tty(struct tty_struct *tty);
31static struct tty_struct *get_tty(int fd)
32{
33 struct file *filp;
34 struct tty_struct *ttyp = NULL;
35
36 rcu_read_lock();
37 filp = fcheck(fd);
38 if(filp && filp->private_data) {
39 ttyp = (struct tty_struct *) filp->private_data;
40
41 if(ttyp->magic != TTY_MAGIC)
42 ttyp =NULL;
43 }
44 rcu_read_unlock();
45 return ttyp;
46}
47
48static struct tty_struct *get_real_tty(struct tty_struct *tp)
49{
50 if (tp->driver->type == TTY_DRIVER_TYPE_PTY &&
51 tp->driver->subtype == PTY_TYPE_MASTER)
52 return tp->link;
53 else
54 return tp;
55}
56
57asmlinkage int irix_ioctl(int fd, unsigned long cmd, unsigned long arg)
58{
59 struct tty_struct *tp, *rtp;
60 mm_segment_t old_fs;
61 int i, error = 0;
62
63#ifdef DEBUG_IOCTLS
64 printk("[%s:%d] irix_ioctl(%d, ", current->comm, current->pid, fd);
65#endif
66 switch(cmd) {
67 case 0x00005401:
68#ifdef DEBUG_IOCTLS
69 printk("TCGETA, %08lx) ", arg);
70#endif
71 error = sys_ioctl(fd, TCGETA, arg);
72 break;
73
74 case 0x0000540d: {
75 struct termios kt;
76 struct irix_termios __user *it =
77 (struct irix_termios __user *) arg;
78
79#ifdef DEBUG_IOCTLS
80 printk("TCGETS, %08lx) ", arg);
81#endif
82 if (!access_ok(VERIFY_WRITE, it, sizeof(*it))) {
83 error = -EFAULT;
84 break;
85 }
86 old_fs = get_fs(); set_fs(get_ds());
87 error = sys_ioctl(fd, TCGETS, (unsigned long) &kt);
88 set_fs(old_fs);
89 if (error)
90 break;
91
92 error = __put_user(kt.c_iflag, &it->c_iflag);
93 error |= __put_user(kt.c_oflag, &it->c_oflag);
94 error |= __put_user(kt.c_cflag, &it->c_cflag);
95 error |= __put_user(kt.c_lflag, &it->c_lflag);
96
97 for (i = 0; i < NCCS; i++)
98 error |= __put_user(kt.c_cc[i], &it->c_cc[i]);
99 break;
100 }
101
102 case 0x0000540e: {
103 struct termios kt;
104 struct irix_termios *it = (struct irix_termios *) arg;
105
106#ifdef DEBUG_IOCTLS
107 printk("TCSETS, %08lx) ", arg);
108#endif
109 if (!access_ok(VERIFY_READ, it, sizeof(*it))) {
110 error = -EFAULT;
111 break;
112 }
113 old_fs = get_fs(); set_fs(get_ds());
114 error = sys_ioctl(fd, TCGETS, (unsigned long) &kt);
115 set_fs(old_fs);
116 if (error)
117 break;
118
119 error = __get_user(kt.c_iflag, &it->c_iflag);
120 error |= __get_user(kt.c_oflag, &it->c_oflag);
121 error |= __get_user(kt.c_cflag, &it->c_cflag);
122 error |= __get_user(kt.c_lflag, &it->c_lflag);
123
124 for (i = 0; i < NCCS; i++)
125 error |= __get_user(kt.c_cc[i], &it->c_cc[i]);
126
127 if (error)
128 break;
129 old_fs = get_fs(); set_fs(get_ds());
130 error = sys_ioctl(fd, TCSETS, (unsigned long) &kt);
131 set_fs(old_fs);
132 break;
133 }
134
135 case 0x0000540f:
136#ifdef DEBUG_IOCTLS
137 printk("TCSETSW, %08lx) ", arg);
138#endif
139 error = sys_ioctl(fd, TCSETSW, arg);
140 break;
141
142 case 0x00005471:
143#ifdef DEBUG_IOCTLS
144 printk("TIOCNOTTY, %08lx) ", arg);
145#endif
146 error = sys_ioctl(fd, TIOCNOTTY, arg);
147 break;
148
149 case 0x00007416:
150#ifdef DEBUG_IOCTLS
151 printk("TIOCGSID, %08lx) ", arg);
152#endif
153 tp = get_tty(fd);
154 if(!tp) {
155 error = -EINVAL;
156 break;
157 }
158 rtp = get_real_tty(tp);
159#ifdef DEBUG_IOCTLS
160 printk("rtp->session=%d ", rtp->session);
161#endif
162 error = put_user(rtp->session, (unsigned long __user *) arg);
163 break;
164
165 case 0x746e:
166 /* TIOCSTART, same effect as hitting ^Q */
167#ifdef DEBUG_IOCTLS
168 printk("TIOCSTART, %08lx) ", arg);
169#endif
170 tp = get_tty(fd);
171 if(!tp) {
172 error = -EINVAL;
173 break;
174 }
175 rtp = get_real_tty(tp);
176 start_tty(rtp);
177 break;
178
179 case 0x20006968:
180#ifdef DEBUG_IOCTLS
181 printk("SIOCGETLABEL, %08lx) ", arg);
182#endif
183 error = -ENOPKG;
184 break;
185
186 case 0x40047477:
187#ifdef DEBUG_IOCTLS
188 printk("TIOCGPGRP, %08lx) ", arg);
189#endif
190 error = sys_ioctl(fd, TIOCGPGRP, arg);
191#ifdef DEBUG_IOCTLS
192 printk("arg=%d ", *(int *)arg);
193#endif
194 break;
195
196 case 0x40087468:
197#ifdef DEBUG_IOCTLS
198 printk("TIOCGWINSZ, %08lx) ", arg);
199#endif
200 error = sys_ioctl(fd, TIOCGWINSZ, arg);
201 break;
202
203 case 0x8004667e:
204 error = sys_ioctl(fd, FIONBIO, arg);
205 break;
206
207 case 0x80047476:
208 error = sys_ioctl(fd, TIOCSPGRP, arg);
209 break;
210
211 case 0x8020690c:
212 error = sys_ioctl(fd, SIOCSIFADDR, arg);
213 break;
214
215 case 0x80206910:
216 error = sys_ioctl(fd, SIOCSIFFLAGS, arg);
217 break;
218
219 case 0xc0206911:
220 error = sys_ioctl(fd, SIOCGIFFLAGS, arg);
221 break;
222
223 case 0xc020691b:
224 error = sys_ioctl(fd, SIOCGIFMETRIC, arg);
225 break;
226
227 default: {
228#ifdef DEBUG_MISSING_IOCTL
229 char *msg = "Unimplemented IOCTL cmd tell linux-mips@linux-mips.org\n";
230
231#ifdef DEBUG_IOCTLS
232 printk("UNIMP_IOCTL, %08lx)\n", arg);
233#endif
234 old_fs = get_fs(); set_fs(get_ds());
235 sys_write(2, msg, strlen(msg));
236 set_fs(old_fs);
237 printk("[%s:%d] Does unimplemented IRIX ioctl cmd %08lx\n",
238 current->comm, current->pid, cmd);
239 do_exit(255);
240#else
241 error = sys_ioctl(fd, cmd, arg);
242#endif
243 }
244
245 };
246#ifdef DEBUG_IOCTLS
247 printk("error=%d\n", error);
248#endif
249 return error;
250}