Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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/smp_lock.h> |
| 13 | #include <linux/sockios.h> |
| 14 | #include <linux/syscalls.h> |
| 15 | #include <linux/tty.h> |
| 16 | #include <linux/file.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 | |
| 25 | struct irix_termios { |
| 26 | tcflag_t c_iflag, c_oflag, c_cflag, c_lflag; |
| 27 | cc_t c_cc[NCCS]; |
| 28 | }; |
| 29 | |
| 30 | extern void start_tty(struct tty_struct *tty); |
| 31 | static struct tty_struct *get_tty(int fd) |
| 32 | { |
| 33 | struct file *filp; |
| 34 | struct tty_struct *ttyp = NULL; |
| 35 | |
| 36 | spin_lock(¤t->files->file_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 | spin_unlock(¤t->files->file_lock); |
| 45 | return ttyp; |
| 46 | } |
| 47 | |
| 48 | static 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 | |
| 57 | asmlinkage 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 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 *it = (struct irix_termios *) arg; |
| 77 | |
| 78 | #ifdef DEBUG_IOCTLS |
| 79 | printk("TCGETS, %08lx) ", arg); |
| 80 | #endif |
| 81 | if(!access_ok(VERIFY_WRITE, it, sizeof(*it))) { |
| 82 | error = -EFAULT; |
| 83 | break; |
| 84 | } |
| 85 | old_fs = get_fs(); set_fs(get_ds()); |
| 86 | error = sys_ioctl(fd, TCGETS, (unsigned long) &kt); |
| 87 | set_fs(old_fs); |
| 88 | if (error) |
| 89 | break; |
| 90 | __put_user(kt.c_iflag, &it->c_iflag); |
| 91 | __put_user(kt.c_oflag, &it->c_oflag); |
| 92 | __put_user(kt.c_cflag, &it->c_cflag); |
| 93 | __put_user(kt.c_lflag, &it->c_lflag); |
| 94 | for(error = 0; error < NCCS; error++) |
| 95 | __put_user(kt.c_cc[error], &it->c_cc[error]); |
| 96 | error = 0; |
| 97 | break; |
| 98 | } |
| 99 | |
| 100 | case 0x0000540e: { |
| 101 | struct termios kt; |
| 102 | struct irix_termios *it = (struct irix_termios *) arg; |
| 103 | |
| 104 | #ifdef DEBUG_IOCTLS |
| 105 | printk("TCSETS, %08lx) ", arg); |
| 106 | #endif |
| 107 | if (!access_ok(VERIFY_READ, it, sizeof(*it))) { |
| 108 | error = -EFAULT; |
| 109 | break; |
| 110 | } |
| 111 | old_fs = get_fs(); set_fs(get_ds()); |
| 112 | error = sys_ioctl(fd, TCGETS, (unsigned long) &kt); |
| 113 | set_fs(old_fs); |
| 114 | if(error) |
| 115 | break; |
| 116 | __get_user(kt.c_iflag, &it->c_iflag); |
| 117 | __get_user(kt.c_oflag, &it->c_oflag); |
| 118 | __get_user(kt.c_cflag, &it->c_cflag); |
| 119 | __get_user(kt.c_lflag, &it->c_lflag); |
| 120 | for(error = 0; error < NCCS; error++) |
| 121 | __get_user(kt.c_cc[error], &it->c_cc[error]); |
| 122 | old_fs = get_fs(); set_fs(get_ds()); |
| 123 | error = sys_ioctl(fd, TCSETS, (unsigned long) &kt); |
| 124 | set_fs(old_fs); |
| 125 | break; |
| 126 | } |
| 127 | |
| 128 | case 0x0000540f: |
| 129 | #ifdef DEBUG_IOCTLS |
| 130 | printk("TCSETSW, %08lx) ", arg); |
| 131 | #endif |
| 132 | error = sys_ioctl(fd, TCSETSW, arg); |
| 133 | break; |
| 134 | |
| 135 | case 0x00005471: |
| 136 | #ifdef DEBUG_IOCTLS |
| 137 | printk("TIOCNOTTY, %08lx) ", arg); |
| 138 | #endif |
| 139 | error = sys_ioctl(fd, TIOCNOTTY, arg); |
| 140 | break; |
| 141 | |
| 142 | case 0x00007416: |
| 143 | #ifdef DEBUG_IOCTLS |
| 144 | printk("TIOCGSID, %08lx) ", arg); |
| 145 | #endif |
| 146 | tp = get_tty(fd); |
| 147 | if(!tp) { |
| 148 | error = -EINVAL; |
| 149 | break; |
| 150 | } |
| 151 | rtp = get_real_tty(tp); |
| 152 | #ifdef DEBUG_IOCTLS |
| 153 | printk("rtp->session=%d ", rtp->session); |
| 154 | #endif |
| 155 | error = put_user(rtp->session, (unsigned long *) arg); |
| 156 | break; |
| 157 | |
| 158 | case 0x746e: |
| 159 | /* TIOCSTART, same effect as hitting ^Q */ |
| 160 | #ifdef DEBUG_IOCTLS |
| 161 | printk("TIOCSTART, %08lx) ", arg); |
| 162 | #endif |
| 163 | tp = get_tty(fd); |
| 164 | if(!tp) { |
| 165 | error = -EINVAL; |
| 166 | break; |
| 167 | } |
| 168 | rtp = get_real_tty(tp); |
| 169 | start_tty(rtp); |
| 170 | break; |
| 171 | |
| 172 | case 0x20006968: |
| 173 | #ifdef DEBUG_IOCTLS |
| 174 | printk("SIOCGETLABEL, %08lx) ", arg); |
| 175 | #endif |
| 176 | error = -ENOPKG; |
| 177 | break; |
| 178 | |
| 179 | case 0x40047477: |
| 180 | #ifdef DEBUG_IOCTLS |
| 181 | printk("TIOCGPGRP, %08lx) ", arg); |
| 182 | #endif |
| 183 | error = sys_ioctl(fd, TIOCGPGRP, arg); |
| 184 | #ifdef DEBUG_IOCTLS |
| 185 | printk("arg=%d ", *(int *)arg); |
| 186 | #endif |
| 187 | break; |
| 188 | |
| 189 | case 0x40087468: |
| 190 | #ifdef DEBUG_IOCTLS |
| 191 | printk("TIOCGWINSZ, %08lx) ", arg); |
| 192 | #endif |
| 193 | error = sys_ioctl(fd, TIOCGWINSZ, arg); |
| 194 | break; |
| 195 | |
| 196 | case 0x8004667e: |
| 197 | #ifdef DEBUG_IOCTLS |
| 198 | printk("FIONBIO, %08lx) arg=%d ", arg, *(int *)arg); |
| 199 | #endif |
| 200 | error = sys_ioctl(fd, FIONBIO, arg); |
| 201 | break; |
| 202 | |
| 203 | case 0x80047476: |
| 204 | #ifdef DEBUG_IOCTLS |
| 205 | printk("TIOCSPGRP, %08lx) arg=%d ", arg, *(int *)arg); |
| 206 | #endif |
| 207 | error = sys_ioctl(fd, TIOCSPGRP, arg); |
| 208 | break; |
| 209 | |
| 210 | case 0x8020690c: |
| 211 | #ifdef DEBUG_IOCTLS |
| 212 | printk("SIOCSIFADDR, %08lx) arg=%d ", arg, *(int *)arg); |
| 213 | #endif |
| 214 | error = sys_ioctl(fd, SIOCSIFADDR, arg); |
| 215 | break; |
| 216 | |
| 217 | case 0x80206910: |
| 218 | #ifdef DEBUG_IOCTLS |
| 219 | printk("SIOCSIFFLAGS, %08lx) arg=%d ", arg, *(int *)arg); |
| 220 | #endif |
| 221 | error = sys_ioctl(fd, SIOCSIFFLAGS, arg); |
| 222 | break; |
| 223 | |
| 224 | case 0xc0206911: |
| 225 | #ifdef DEBUG_IOCTLS |
| 226 | printk("SIOCGIFFLAGS, %08lx) arg=%d ", arg, *(int *)arg); |
| 227 | #endif |
| 228 | error = sys_ioctl(fd, SIOCGIFFLAGS, arg); |
| 229 | break; |
| 230 | |
| 231 | case 0xc020691b: |
| 232 | #ifdef DEBUG_IOCTLS |
| 233 | printk("SIOCGIFMETRIC, %08lx) arg=%d ", arg, *(int *)arg); |
| 234 | #endif |
| 235 | error = sys_ioctl(fd, SIOCGIFMETRIC, arg); |
| 236 | break; |
| 237 | |
| 238 | default: { |
| 239 | #ifdef DEBUG_MISSING_IOCTL |
| 240 | char *msg = "Unimplemented IOCTL cmd tell linux@engr.sgi.com\n"; |
| 241 | |
| 242 | #ifdef DEBUG_IOCTLS |
| 243 | printk("UNIMP_IOCTL, %08lx)\n", arg); |
| 244 | #endif |
| 245 | old_fs = get_fs(); set_fs(get_ds()); |
| 246 | sys_write(2, msg, strlen(msg)); |
| 247 | set_fs(old_fs); |
| 248 | printk("[%s:%d] Does unimplemented IRIX ioctl cmd %08lx\n", |
| 249 | current->comm, current->pid, cmd); |
| 250 | do_exit(255); |
| 251 | #else |
| 252 | error = sys_ioctl (fd, cmd, arg); |
| 253 | #endif |
| 254 | } |
| 255 | |
| 256 | }; |
| 257 | #ifdef DEBUG_IOCTLS |
| 258 | printk("error=%d\n", error); |
| 259 | #endif |
| 260 | return error; |
| 261 | } |