Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/char/vt_ioctl.c |
| 3 | * |
| 4 | * Copyright (C) 1992 obz under the linux copyright |
| 5 | * |
| 6 | * Dynamic diacritical handling - aeb@cwi.nl - Dec 1993 |
| 7 | * Dynamic keymap and string allocation - aeb@cwi.nl - May 1994 |
| 8 | * Restrict VT switching via ioctl() - grif@cs.ucr.edu - Dec 1995 |
| 9 | * Some code moved for less code duplication - Andi Kleen - Mar 1997 |
| 10 | * Check put/get_user, cleanups - acme@conectiva.com.br - Jun 2001 |
| 11 | */ |
| 12 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/types.h> |
| 14 | #include <linux/errno.h> |
| 15 | #include <linux/sched.h> |
| 16 | #include <linux/tty.h> |
| 17 | #include <linux/timer.h> |
| 18 | #include <linux/kernel.h> |
| 19 | #include <linux/kd.h> |
| 20 | #include <linux/vt.h> |
| 21 | #include <linux/string.h> |
| 22 | #include <linux/slab.h> |
| 23 | #include <linux/major.h> |
| 24 | #include <linux/fs.h> |
| 25 | #include <linux/console.h> |
Samuel Thibault | 04c7197 | 2007-10-16 23:27:04 -0700 | [diff] [blame] | 26 | #include <linux/consolemap.h> |
Jesper Juhl | 7ed20e1 | 2005-05-01 08:59:14 -0700 | [diff] [blame] | 27 | #include <linux/signal.h> |
Emmanuel Colbus | bcc8ca0 | 2005-06-28 20:44:49 -0700 | [diff] [blame] | 28 | #include <linux/timex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
| 30 | #include <asm/io.h> |
| 31 | #include <asm/uaccess.h> |
| 32 | |
| 33 | #include <linux/kbd_kern.h> |
| 34 | #include <linux/vt_kern.h> |
| 35 | #include <linux/kbd_diacr.h> |
| 36 | #include <linux/selection.h> |
| 37 | |
Andrew Johnson | b257bc0 | 2007-03-16 13:38:24 -0800 | [diff] [blame] | 38 | char vt_dont_switch; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | extern struct tty_driver *console_driver; |
| 40 | |
| 41 | #define VT_IS_IN_USE(i) (console_driver->ttys[i] && console_driver->ttys[i]->count) |
| 42 | #define VT_BUSY(i) (VT_IS_IN_USE(i) || i == fg_console || vc_cons[i].d == sel_cons) |
| 43 | |
| 44 | /* |
| 45 | * Console (vt and kd) routines, as defined by USL SVR4 manual, and by |
| 46 | * experimentation and study of X386 SYSV handling. |
| 47 | * |
| 48 | * One point of difference: SYSV vt's are /dev/vtX, which X >= 0, and |
| 49 | * /dev/console is a separate ttyp. Under Linux, /dev/tty0 is /dev/console, |
| 50 | * and the vc start at /dev/ttyX, X >= 1. We maintain that here, so we will |
| 51 | * always treat our set of vt as numbered 1..MAX_NR_CONSOLES (corresponding to |
| 52 | * ttys 0..MAX_NR_CONSOLES-1). Explicitly naming VT 0 is illegal, but using |
| 53 | * /dev/tty0 (fg_console) as a target is legal, since an implicit aliasing |
| 54 | * to the current console is done by the main ioctl code. |
| 55 | */ |
| 56 | |
| 57 | #ifdef CONFIG_X86 |
| 58 | #include <linux/syscalls.h> |
| 59 | #endif |
| 60 | |
| 61 | static void complete_change_console(struct vc_data *vc); |
| 62 | |
| 63 | /* |
| 64 | * these are the valid i/o ports we're allowed to change. they map all the |
| 65 | * video ports |
| 66 | */ |
| 67 | #define GPFIRST 0x3b4 |
| 68 | #define GPLAST 0x3df |
| 69 | #define GPNUM (GPLAST - GPFIRST + 1) |
| 70 | |
| 71 | #define i (tmp.kb_index) |
| 72 | #define s (tmp.kb_table) |
| 73 | #define v (tmp.kb_value) |
| 74 | static inline int |
| 75 | do_kdsk_ioctl(int cmd, struct kbentry __user *user_kbe, int perm, struct kbd_struct *kbd) |
| 76 | { |
| 77 | struct kbentry tmp; |
| 78 | ushort *key_map, val, ov; |
| 79 | |
| 80 | if (copy_from_user(&tmp, user_kbe, sizeof(struct kbentry))) |
| 81 | return -EFAULT; |
| 82 | |
Marcelo Tosatti | e3f17f0 | 2005-11-07 00:59:34 -0800 | [diff] [blame] | 83 | if (!capable(CAP_SYS_TTY_CONFIG)) |
| 84 | perm = 0; |
| 85 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | switch (cmd) { |
| 87 | case KDGKBENT: |
| 88 | key_map = key_maps[s]; |
| 89 | if (key_map) { |
| 90 | val = U(key_map[i]); |
| 91 | if (kbd->kbdmode != VC_UNICODE && KTYP(val) >= NR_TYPES) |
| 92 | val = K_HOLE; |
| 93 | } else |
| 94 | val = (i ? K_HOLE : K_NOSUCHMAP); |
| 95 | return put_user(val, &user_kbe->kb_value); |
| 96 | case KDSKBENT: |
| 97 | if (!perm) |
| 98 | return -EPERM; |
| 99 | if (!i && v == K_NOSUCHMAP) { |
Alan Cox | ca9bda0 | 2006-09-29 02:00:03 -0700 | [diff] [blame] | 100 | /* deallocate map */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | key_map = key_maps[s]; |
| 102 | if (s && key_map) { |
| 103 | key_maps[s] = NULL; |
| 104 | if (key_map[0] == U(K_ALLOCATED)) { |
| 105 | kfree(key_map); |
| 106 | keymap_count--; |
| 107 | } |
| 108 | } |
| 109 | break; |
| 110 | } |
| 111 | |
| 112 | if (KTYP(v) < NR_TYPES) { |
| 113 | if (KVAL(v) > max_vals[KTYP(v)]) |
| 114 | return -EINVAL; |
| 115 | } else |
| 116 | if (kbd->kbdmode != VC_UNICODE) |
| 117 | return -EINVAL; |
| 118 | |
| 119 | /* ++Geert: non-PC keyboards may generate keycode zero */ |
| 120 | #if !defined(__mc68000__) && !defined(__powerpc__) |
| 121 | /* assignment to entry 0 only tests validity of args */ |
| 122 | if (!i) |
| 123 | break; |
| 124 | #endif |
| 125 | |
| 126 | if (!(key_map = key_maps[s])) { |
| 127 | int j; |
| 128 | |
| 129 | if (keymap_count >= MAX_NR_OF_USER_KEYMAPS && |
| 130 | !capable(CAP_SYS_RESOURCE)) |
| 131 | return -EPERM; |
| 132 | |
Robert P. J. Day | 5cbded5 | 2006-12-13 00:35:56 -0800 | [diff] [blame] | 133 | key_map = kmalloc(sizeof(plain_map), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | GFP_KERNEL); |
| 135 | if (!key_map) |
| 136 | return -ENOMEM; |
| 137 | key_maps[s] = key_map; |
| 138 | key_map[0] = U(K_ALLOCATED); |
| 139 | for (j = 1; j < NR_KEYS; j++) |
| 140 | key_map[j] = U(K_HOLE); |
| 141 | keymap_count++; |
| 142 | } |
| 143 | ov = U(key_map[i]); |
| 144 | if (v == ov) |
| 145 | break; /* nothing to do */ |
| 146 | /* |
| 147 | * Attention Key. |
| 148 | */ |
| 149 | if (((ov == K_SAK) || (v == K_SAK)) && !capable(CAP_SYS_ADMIN)) |
| 150 | return -EPERM; |
| 151 | key_map[i] = U(v); |
| 152 | if (!s && (KTYP(ov) == KT_SHIFT || KTYP(v) == KT_SHIFT)) |
| 153 | compute_shiftstate(); |
| 154 | break; |
| 155 | } |
| 156 | return 0; |
| 157 | } |
| 158 | #undef i |
| 159 | #undef s |
| 160 | #undef v |
| 161 | |
| 162 | static inline int |
| 163 | do_kbkeycode_ioctl(int cmd, struct kbkeycode __user *user_kbkc, int perm) |
| 164 | { |
| 165 | struct kbkeycode tmp; |
| 166 | int kc = 0; |
| 167 | |
| 168 | if (copy_from_user(&tmp, user_kbkc, sizeof(struct kbkeycode))) |
| 169 | return -EFAULT; |
| 170 | switch (cmd) { |
| 171 | case KDGETKEYCODE: |
| 172 | kc = getkeycode(tmp.scancode); |
| 173 | if (kc >= 0) |
| 174 | kc = put_user(kc, &user_kbkc->keycode); |
| 175 | break; |
| 176 | case KDSETKEYCODE: |
| 177 | if (!perm) |
| 178 | return -EPERM; |
| 179 | kc = setkeycode(tmp.scancode, tmp.keycode); |
| 180 | break; |
| 181 | } |
| 182 | return kc; |
| 183 | } |
| 184 | |
| 185 | static inline int |
| 186 | do_kdgkb_ioctl(int cmd, struct kbsentry __user *user_kdgkb, int perm) |
| 187 | { |
| 188 | struct kbsentry *kbs; |
| 189 | char *p; |
| 190 | u_char *q; |
| 191 | u_char __user *up; |
| 192 | int sz; |
| 193 | int delta; |
| 194 | char *first_free, *fj, *fnw; |
| 195 | int i, j, k; |
| 196 | int ret; |
| 197 | |
Andrew Morton | 0b360ad | 2005-10-30 15:03:02 -0800 | [diff] [blame] | 198 | if (!capable(CAP_SYS_TTY_CONFIG)) |
Marcelo Tosatti | e3f17f0 | 2005-11-07 00:59:34 -0800 | [diff] [blame] | 199 | perm = 0; |
Andrew Morton | 0b360ad | 2005-10-30 15:03:02 -0800 | [diff] [blame] | 200 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | kbs = kmalloc(sizeof(*kbs), GFP_KERNEL); |
| 202 | if (!kbs) { |
| 203 | ret = -ENOMEM; |
| 204 | goto reterr; |
| 205 | } |
| 206 | |
| 207 | /* we mostly copy too much here (512bytes), but who cares ;) */ |
| 208 | if (copy_from_user(kbs, user_kdgkb, sizeof(struct kbsentry))) { |
| 209 | ret = -EFAULT; |
| 210 | goto reterr; |
| 211 | } |
| 212 | kbs->kb_string[sizeof(kbs->kb_string)-1] = '\0'; |
| 213 | i = kbs->kb_func; |
| 214 | |
| 215 | switch (cmd) { |
| 216 | case KDGKBSENT: |
| 217 | sz = sizeof(kbs->kb_string) - 1; /* sz should have been |
| 218 | a struct member */ |
| 219 | up = user_kdgkb->kb_string; |
| 220 | p = func_table[i]; |
| 221 | if(p) |
| 222 | for ( ; *p && sz; p++, sz--) |
| 223 | if (put_user(*p, up++)) { |
| 224 | ret = -EFAULT; |
| 225 | goto reterr; |
| 226 | } |
| 227 | if (put_user('\0', up)) { |
| 228 | ret = -EFAULT; |
| 229 | goto reterr; |
| 230 | } |
| 231 | kfree(kbs); |
| 232 | return ((p && *p) ? -EOVERFLOW : 0); |
| 233 | case KDSKBSENT: |
| 234 | if (!perm) { |
| 235 | ret = -EPERM; |
| 236 | goto reterr; |
| 237 | } |
| 238 | |
| 239 | q = func_table[i]; |
| 240 | first_free = funcbufptr + (funcbufsize - funcbufleft); |
| 241 | for (j = i+1; j < MAX_NR_FUNC && !func_table[j]; j++) |
| 242 | ; |
| 243 | if (j < MAX_NR_FUNC) |
| 244 | fj = func_table[j]; |
| 245 | else |
| 246 | fj = first_free; |
| 247 | |
| 248 | delta = (q ? -strlen(q) : 1) + strlen(kbs->kb_string); |
| 249 | if (delta <= funcbufleft) { /* it fits in current buf */ |
| 250 | if (j < MAX_NR_FUNC) { |
| 251 | memmove(fj + delta, fj, first_free - fj); |
| 252 | for (k = j; k < MAX_NR_FUNC; k++) |
| 253 | if (func_table[k]) |
| 254 | func_table[k] += delta; |
| 255 | } |
| 256 | if (!q) |
| 257 | func_table[i] = fj; |
| 258 | funcbufleft -= delta; |
| 259 | } else { /* allocate a larger buffer */ |
| 260 | sz = 256; |
| 261 | while (sz < funcbufsize - funcbufleft + delta) |
| 262 | sz <<= 1; |
Robert P. J. Day | 5cbded5 | 2006-12-13 00:35:56 -0800 | [diff] [blame] | 263 | fnw = kmalloc(sz, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | if(!fnw) { |
| 265 | ret = -ENOMEM; |
| 266 | goto reterr; |
| 267 | } |
| 268 | |
| 269 | if (!q) |
| 270 | func_table[i] = fj; |
| 271 | if (fj > funcbufptr) |
| 272 | memmove(fnw, funcbufptr, fj - funcbufptr); |
| 273 | for (k = 0; k < j; k++) |
| 274 | if (func_table[k]) |
| 275 | func_table[k] = fnw + (func_table[k] - funcbufptr); |
| 276 | |
| 277 | if (first_free > fj) { |
| 278 | memmove(fnw + (fj - funcbufptr) + delta, fj, first_free - fj); |
| 279 | for (k = j; k < MAX_NR_FUNC; k++) |
| 280 | if (func_table[k]) |
| 281 | func_table[k] = fnw + (func_table[k] - funcbufptr) + delta; |
| 282 | } |
| 283 | if (funcbufptr != func_buf) |
| 284 | kfree(funcbufptr); |
| 285 | funcbufptr = fnw; |
| 286 | funcbufleft = funcbufleft - delta + sz - funcbufsize; |
| 287 | funcbufsize = sz; |
| 288 | } |
| 289 | strcpy(func_table[i], kbs->kb_string); |
| 290 | break; |
| 291 | } |
| 292 | ret = 0; |
| 293 | reterr: |
| 294 | kfree(kbs); |
| 295 | return ret; |
| 296 | } |
| 297 | |
| 298 | static inline int |
| 299 | do_fontx_ioctl(int cmd, struct consolefontdesc __user *user_cfd, int perm, struct console_font_op *op) |
| 300 | { |
| 301 | struct consolefontdesc cfdarg; |
| 302 | int i; |
| 303 | |
| 304 | if (copy_from_user(&cfdarg, user_cfd, sizeof(struct consolefontdesc))) |
| 305 | return -EFAULT; |
| 306 | |
| 307 | switch (cmd) { |
| 308 | case PIO_FONTX: |
| 309 | if (!perm) |
| 310 | return -EPERM; |
| 311 | op->op = KD_FONT_OP_SET; |
| 312 | op->flags = KD_FONT_FLAG_OLD; |
| 313 | op->width = 8; |
| 314 | op->height = cfdarg.charheight; |
| 315 | op->charcount = cfdarg.charcount; |
| 316 | op->data = cfdarg.chardata; |
| 317 | return con_font_op(vc_cons[fg_console].d, op); |
| 318 | case GIO_FONTX: { |
| 319 | op->op = KD_FONT_OP_GET; |
| 320 | op->flags = KD_FONT_FLAG_OLD; |
| 321 | op->width = 8; |
| 322 | op->height = cfdarg.charheight; |
| 323 | op->charcount = cfdarg.charcount; |
| 324 | op->data = cfdarg.chardata; |
| 325 | i = con_font_op(vc_cons[fg_console].d, op); |
| 326 | if (i) |
| 327 | return i; |
| 328 | cfdarg.charheight = op->height; |
| 329 | cfdarg.charcount = op->charcount; |
| 330 | if (copy_to_user(user_cfd, &cfdarg, sizeof(struct consolefontdesc))) |
| 331 | return -EFAULT; |
| 332 | return 0; |
| 333 | } |
| 334 | } |
| 335 | return -EINVAL; |
| 336 | } |
| 337 | |
| 338 | static inline int |
| 339 | do_unimap_ioctl(int cmd, struct unimapdesc __user *user_ud, int perm, struct vc_data *vc) |
| 340 | { |
| 341 | struct unimapdesc tmp; |
| 342 | |
| 343 | if (copy_from_user(&tmp, user_ud, sizeof tmp)) |
| 344 | return -EFAULT; |
| 345 | if (tmp.entries) |
| 346 | if (!access_ok(VERIFY_WRITE, tmp.entries, |
| 347 | tmp.entry_ct*sizeof(struct unipair))) |
| 348 | return -EFAULT; |
| 349 | switch (cmd) { |
| 350 | case PIO_UNIMAP: |
| 351 | if (!perm) |
| 352 | return -EPERM; |
| 353 | return con_set_unimap(vc, tmp.entry_ct, tmp.entries); |
| 354 | case GIO_UNIMAP: |
| 355 | if (!perm && fg_console != vc->vc_num) |
| 356 | return -EPERM; |
| 357 | return con_get_unimap(vc, tmp.entry_ct, &(user_ud->entry_ct), tmp.entries); |
| 358 | } |
| 359 | return 0; |
| 360 | } |
| 361 | |
| 362 | /* |
| 363 | * We handle the console-specific ioctl's here. We allow the |
| 364 | * capability to modify any console, not just the fg_console. |
| 365 | */ |
| 366 | int vt_ioctl(struct tty_struct *tty, struct file * file, |
| 367 | unsigned int cmd, unsigned long arg) |
| 368 | { |
Alan Cox | c9f19e9 | 2009-01-02 13:47:26 +0000 | [diff] [blame] | 369 | struct vc_data *vc = tty->driver_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | struct console_font_op op; /* used in multiple places here */ |
| 371 | struct kbd_struct * kbd; |
| 372 | unsigned int console; |
| 373 | unsigned char ucval; |
| 374 | void __user *up = (void __user *)arg; |
| 375 | int i, perm; |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 376 | int ret = 0; |
| 377 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | console = vc->vc_num; |
| 379 | |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 380 | lock_kernel(); |
| 381 | |
| 382 | if (!vc_cons_allocated(console)) { /* impossible? */ |
| 383 | ret = -ENOIOCTLCMD; |
| 384 | goto out; |
| 385 | } |
| 386 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | |
| 388 | /* |
| 389 | * To have permissions to do most of the vt ioctls, we either have |
| 390 | * to be the owner of the tty, or have CAP_SYS_TTY_CONFIG. |
| 391 | */ |
| 392 | perm = 0; |
| 393 | if (current->signal->tty == tty || capable(CAP_SYS_TTY_CONFIG)) |
| 394 | perm = 1; |
| 395 | |
| 396 | kbd = kbd_table + console; |
| 397 | switch (cmd) { |
Alan Cox | e688510 | 2008-10-13 10:36:40 +0100 | [diff] [blame] | 398 | case TIOCLINUX: |
Jiri Slaby | a115902 | 2009-06-22 18:42:18 +0100 | [diff] [blame] | 399 | ret = tioclinux(tty, arg); |
| 400 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | case KIOCSOUND: |
| 402 | if (!perm) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 403 | goto eperm; |
Alan Cox | fab8922 | 2009-05-06 17:17:26 +0100 | [diff] [blame] | 404 | /* FIXME: This is an old broken API but we need to keep it |
| 405 | supported and somehow separate the historic advertised |
| 406 | tick rate from any real one */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | if (arg) |
Emmanuel Colbus | bcc8ca0 | 2005-06-28 20:44:49 -0700 | [diff] [blame] | 408 | arg = CLOCK_TICK_RATE / arg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | kd_mksound(arg, 0); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 410 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | |
| 412 | case KDMKTONE: |
| 413 | if (!perm) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 414 | goto eperm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | { |
| 416 | unsigned int ticks, count; |
| 417 | |
| 418 | /* |
| 419 | * Generate the tone for the appropriate number of ticks. |
| 420 | * If the time is zero, turn off sound ourselves. |
| 421 | */ |
| 422 | ticks = HZ * ((arg >> 16) & 0xffff) / 1000; |
| 423 | count = ticks ? (arg & 0xffff) : 0; |
Alan Cox | fab8922 | 2009-05-06 17:17:26 +0100 | [diff] [blame] | 424 | /* FIXME: This is an old broken API but we need to keep it |
| 425 | supported and somehow separate the historic advertised |
| 426 | tick rate from any real one */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | if (count) |
Emmanuel Colbus | bcc8ca0 | 2005-06-28 20:44:49 -0700 | [diff] [blame] | 428 | count = CLOCK_TICK_RATE / count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | kd_mksound(count, ticks); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 430 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | } |
| 432 | |
| 433 | case KDGKBTYPE: |
| 434 | /* |
| 435 | * this is naive. |
| 436 | */ |
| 437 | ucval = KB_101; |
| 438 | goto setchar; |
| 439 | |
| 440 | /* |
| 441 | * These cannot be implemented on any machine that implements |
| 442 | * ioperm() in user level (such as Alpha PCs) or not at all. |
| 443 | * |
| 444 | * XXX: you should never use these, just call ioperm directly.. |
| 445 | */ |
| 446 | #ifdef CONFIG_X86 |
| 447 | case KDADDIO: |
| 448 | case KDDELIO: |
| 449 | /* |
| 450 | * KDADDIO and KDDELIO may be able to add ports beyond what |
| 451 | * we reject here, but to be safe... |
| 452 | */ |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 453 | if (arg < GPFIRST || arg > GPLAST) { |
| 454 | ret = -EINVAL; |
| 455 | break; |
| 456 | } |
| 457 | ret = sys_ioperm(arg, 1, (cmd == KDADDIO)) ? -ENXIO : 0; |
| 458 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | |
| 460 | case KDENABIO: |
| 461 | case KDDISABIO: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 462 | ret = sys_ioperm(GPFIRST, GPNUM, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | (cmd == KDENABIO)) ? -ENXIO : 0; |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 464 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | #endif |
| 466 | |
| 467 | /* Linux m68k/i386 interface for setting the keyboard delay/repeat rate */ |
| 468 | |
| 469 | case KDKBDREP: |
| 470 | { |
| 471 | struct kbd_repeat kbrep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | |
| 473 | if (!capable(CAP_SYS_TTY_CONFIG)) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 474 | goto eperm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 476 | if (copy_from_user(&kbrep, up, sizeof(struct kbd_repeat))) { |
| 477 | ret = -EFAULT; |
| 478 | break; |
| 479 | } |
| 480 | ret = kbd_rate(&kbrep); |
| 481 | if (ret) |
| 482 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | if (copy_to_user(up, &kbrep, sizeof(struct kbd_repeat))) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 484 | ret = -EFAULT; |
| 485 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | } |
| 487 | |
| 488 | case KDSETMODE: |
| 489 | /* |
| 490 | * currently, setting the mode from KD_TEXT to KD_GRAPHICS |
| 491 | * doesn't do a whole lot. i'm not sure if it should do any |
| 492 | * restoration of modes or what... |
| 493 | * |
| 494 | * XXX It should at least call into the driver, fbdev's definitely |
| 495 | * need to restore their engine state. --BenH |
| 496 | */ |
| 497 | if (!perm) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 498 | goto eperm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | switch (arg) { |
| 500 | case KD_GRAPHICS: |
| 501 | break; |
| 502 | case KD_TEXT0: |
| 503 | case KD_TEXT1: |
| 504 | arg = KD_TEXT; |
| 505 | case KD_TEXT: |
| 506 | break; |
| 507 | default: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 508 | ret = -EINVAL; |
| 509 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | } |
| 511 | if (vc->vc_mode == (unsigned char) arg) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 512 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | vc->vc_mode = (unsigned char) arg; |
| 514 | if (console != fg_console) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 515 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | /* |
| 517 | * explicitly blank/unblank the screen if switching modes |
| 518 | */ |
| 519 | acquire_console_sem(); |
| 520 | if (arg == KD_TEXT) |
| 521 | do_unblank_screen(1); |
| 522 | else |
| 523 | do_blank_screen(1); |
| 524 | release_console_sem(); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 525 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | |
| 527 | case KDGETMODE: |
| 528 | ucval = vc->vc_mode; |
| 529 | goto setint; |
| 530 | |
| 531 | case KDMAPDISP: |
| 532 | case KDUNMAPDISP: |
| 533 | /* |
| 534 | * these work like a combination of mmap and KDENABIO. |
| 535 | * this could be easily finished. |
| 536 | */ |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 537 | ret = -EINVAL; |
| 538 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | |
| 540 | case KDSKBMODE: |
| 541 | if (!perm) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 542 | goto eperm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | switch(arg) { |
| 544 | case K_RAW: |
| 545 | kbd->kbdmode = VC_RAW; |
| 546 | break; |
| 547 | case K_MEDIUMRAW: |
| 548 | kbd->kbdmode = VC_MEDIUMRAW; |
| 549 | break; |
| 550 | case K_XLATE: |
| 551 | kbd->kbdmode = VC_XLATE; |
| 552 | compute_shiftstate(); |
| 553 | break; |
| 554 | case K_UNICODE: |
| 555 | kbd->kbdmode = VC_UNICODE; |
| 556 | compute_shiftstate(); |
| 557 | break; |
| 558 | default: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 559 | ret = -EINVAL; |
| 560 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | } |
| 562 | tty_ldisc_flush(tty); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 563 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | |
| 565 | case KDGKBMODE: |
| 566 | ucval = ((kbd->kbdmode == VC_RAW) ? K_RAW : |
| 567 | (kbd->kbdmode == VC_MEDIUMRAW) ? K_MEDIUMRAW : |
| 568 | (kbd->kbdmode == VC_UNICODE) ? K_UNICODE : |
| 569 | K_XLATE); |
| 570 | goto setint; |
| 571 | |
| 572 | /* this could be folded into KDSKBMODE, but for compatibility |
| 573 | reasons it is not so easy to fold KDGKBMETA into KDGKBMODE */ |
| 574 | case KDSKBMETA: |
| 575 | switch(arg) { |
| 576 | case K_METABIT: |
| 577 | clr_vc_kbd_mode(kbd, VC_META); |
| 578 | break; |
| 579 | case K_ESCPREFIX: |
| 580 | set_vc_kbd_mode(kbd, VC_META); |
| 581 | break; |
| 582 | default: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 583 | ret = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | } |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 585 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | |
| 587 | case KDGKBMETA: |
| 588 | ucval = (vc_kbd_mode(kbd, VC_META) ? K_ESCPREFIX : K_METABIT); |
| 589 | setint: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 590 | ret = put_user(ucval, (int __user *)arg); |
| 591 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | |
| 593 | case KDGETKEYCODE: |
| 594 | case KDSETKEYCODE: |
| 595 | if(!capable(CAP_SYS_TTY_CONFIG)) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 596 | perm = 0; |
| 597 | ret = do_kbkeycode_ioctl(cmd, up, perm); |
| 598 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | |
| 600 | case KDGKBENT: |
| 601 | case KDSKBENT: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 602 | ret = do_kdsk_ioctl(cmd, up, perm, kbd); |
| 603 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 604 | |
| 605 | case KDGKBSENT: |
| 606 | case KDSKBSENT: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 607 | ret = do_kdgkb_ioctl(cmd, up, perm); |
| 608 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | |
| 610 | case KDGKBDIACR: |
| 611 | { |
| 612 | struct kbdiacrs __user *a = up; |
Samuel Thibault | 04c7197 | 2007-10-16 23:27:04 -0700 | [diff] [blame] | 613 | struct kbdiacr diacr; |
| 614 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 616 | if (put_user(accent_table_size, &a->kb_cnt)) { |
| 617 | ret = -EFAULT; |
| 618 | break; |
| 619 | } |
Samuel Thibault | 04c7197 | 2007-10-16 23:27:04 -0700 | [diff] [blame] | 620 | for (i = 0; i < accent_table_size; i++) { |
| 621 | diacr.diacr = conv_uni_to_8bit(accent_table[i].diacr); |
| 622 | diacr.base = conv_uni_to_8bit(accent_table[i].base); |
| 623 | diacr.result = conv_uni_to_8bit(accent_table[i].result); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 624 | if (copy_to_user(a->kbdiacr + i, &diacr, sizeof(struct kbdiacr))) { |
| 625 | ret = -EFAULT; |
| 626 | break; |
| 627 | } |
Samuel Thibault | 04c7197 | 2007-10-16 23:27:04 -0700 | [diff] [blame] | 628 | } |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 629 | break; |
Samuel Thibault | 04c7197 | 2007-10-16 23:27:04 -0700 | [diff] [blame] | 630 | } |
| 631 | case KDGKBDIACRUC: |
| 632 | { |
| 633 | struct kbdiacrsuc __user *a = up; |
| 634 | |
| 635 | if (put_user(accent_table_size, &a->kb_cnt)) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 636 | ret = -EFAULT; |
| 637 | else if (copy_to_user(a->kbdiacruc, accent_table, |
| 638 | accent_table_size*sizeof(struct kbdiacruc))) |
| 639 | ret = -EFAULT; |
| 640 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | } |
| 642 | |
| 643 | case KDSKBDIACR: |
| 644 | { |
| 645 | struct kbdiacrs __user *a = up; |
Samuel Thibault | 04c7197 | 2007-10-16 23:27:04 -0700 | [diff] [blame] | 646 | struct kbdiacr diacr; |
| 647 | unsigned int ct; |
| 648 | int i; |
| 649 | |
| 650 | if (!perm) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 651 | goto eperm; |
| 652 | if (get_user(ct,&a->kb_cnt)) { |
| 653 | ret = -EFAULT; |
| 654 | break; |
| 655 | } |
| 656 | if (ct >= MAX_DIACR) { |
| 657 | ret = -EINVAL; |
| 658 | break; |
| 659 | } |
Samuel Thibault | 04c7197 | 2007-10-16 23:27:04 -0700 | [diff] [blame] | 660 | accent_table_size = ct; |
| 661 | for (i = 0; i < ct; i++) { |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 662 | if (copy_from_user(&diacr, a->kbdiacr + i, sizeof(struct kbdiacr))) { |
| 663 | ret = -EFAULT; |
| 664 | break; |
| 665 | } |
Samuel Thibault | 04c7197 | 2007-10-16 23:27:04 -0700 | [diff] [blame] | 666 | accent_table[i].diacr = conv_8bit_to_uni(diacr.diacr); |
| 667 | accent_table[i].base = conv_8bit_to_uni(diacr.base); |
| 668 | accent_table[i].result = conv_8bit_to_uni(diacr.result); |
| 669 | } |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 670 | break; |
Samuel Thibault | 04c7197 | 2007-10-16 23:27:04 -0700 | [diff] [blame] | 671 | } |
| 672 | |
| 673 | case KDSKBDIACRUC: |
| 674 | { |
| 675 | struct kbdiacrsuc __user *a = up; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | unsigned int ct; |
| 677 | |
| 678 | if (!perm) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 679 | goto eperm; |
| 680 | if (get_user(ct,&a->kb_cnt)) { |
| 681 | ret = -EFAULT; |
| 682 | break; |
| 683 | } |
| 684 | if (ct >= MAX_DIACR) { |
| 685 | ret = -EINVAL; |
| 686 | break; |
| 687 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | accent_table_size = ct; |
Samuel Thibault | 04c7197 | 2007-10-16 23:27:04 -0700 | [diff] [blame] | 689 | if (copy_from_user(accent_table, a->kbdiacruc, ct*sizeof(struct kbdiacruc))) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 690 | ret = -EFAULT; |
| 691 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | } |
| 693 | |
| 694 | /* the ioctls below read/set the flags usually shown in the leds */ |
| 695 | /* don't use them - they will go away without warning */ |
| 696 | case KDGKBLED: |
| 697 | ucval = kbd->ledflagstate | (kbd->default_ledflagstate << 4); |
| 698 | goto setchar; |
| 699 | |
| 700 | case KDSKBLED: |
| 701 | if (!perm) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 702 | goto eperm; |
| 703 | if (arg & ~0x77) { |
| 704 | ret = -EINVAL; |
| 705 | break; |
| 706 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | kbd->ledflagstate = (arg & 7); |
| 708 | kbd->default_ledflagstate = ((arg >> 4) & 7); |
| 709 | set_leds(); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 710 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | |
| 712 | /* the ioctls below only set the lights, not the functions */ |
| 713 | /* for those, see KDGKBLED and KDSKBLED above */ |
| 714 | case KDGETLED: |
| 715 | ucval = getledstate(); |
| 716 | setchar: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 717 | ret = put_user(ucval, (char __user *)arg); |
| 718 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | |
| 720 | case KDSETLED: |
| 721 | if (!perm) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 722 | goto eperm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | setledstate(kbd, arg); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 724 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | |
| 726 | /* |
| 727 | * A process can indicate its willingness to accept signals |
| 728 | * generated by pressing an appropriate key combination. |
| 729 | * Thus, one can have a daemon that e.g. spawns a new console |
| 730 | * upon a keypress and then changes to it. |
| 731 | * See also the kbrequest field of inittab(5). |
| 732 | */ |
| 733 | case KDSIGACCEPT: |
| 734 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | if (!perm || !capable(CAP_KILL)) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 736 | goto eperm; |
Jesper Juhl | 7ed20e1 | 2005-05-01 08:59:14 -0700 | [diff] [blame] | 737 | if (!valid_signal(arg) || arg < 1 || arg == SIGKILL) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 738 | ret = -EINVAL; |
| 739 | else { |
| 740 | spin_lock_irq(&vt_spawn_con.lock); |
| 741 | put_pid(vt_spawn_con.pid); |
| 742 | vt_spawn_con.pid = get_pid(task_pid(current)); |
| 743 | vt_spawn_con.sig = arg; |
| 744 | spin_unlock_irq(&vt_spawn_con.lock); |
| 745 | } |
| 746 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | } |
| 748 | |
| 749 | case VT_SETMODE: |
| 750 | { |
| 751 | struct vt_mode tmp; |
| 752 | |
| 753 | if (!perm) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 754 | goto eperm; |
| 755 | if (copy_from_user(&tmp, up, sizeof(struct vt_mode))) { |
| 756 | ret = -EFAULT; |
| 757 | goto out; |
| 758 | } |
| 759 | if (tmp.mode != VT_AUTO && tmp.mode != VT_PROCESS) { |
| 760 | ret = -EINVAL; |
| 761 | goto out; |
| 762 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | acquire_console_sem(); |
| 764 | vc->vt_mode = tmp; |
| 765 | /* the frsig is ignored, so we set it to 0 */ |
| 766 | vc->vt_mode.frsig = 0; |
Eric W. Biederman | 8b6312f | 2007-02-10 01:44:34 -0800 | [diff] [blame] | 767 | put_pid(vc->vt_pid); |
| 768 | vc->vt_pid = get_pid(task_pid(current)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | /* no switch is required -- saw@shade.msu.ru */ |
| 770 | vc->vt_newvt = -1; |
| 771 | release_console_sem(); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 772 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | } |
| 774 | |
| 775 | case VT_GETMODE: |
| 776 | { |
| 777 | struct vt_mode tmp; |
| 778 | int rc; |
| 779 | |
| 780 | acquire_console_sem(); |
| 781 | memcpy(&tmp, &vc->vt_mode, sizeof(struct vt_mode)); |
| 782 | release_console_sem(); |
| 783 | |
| 784 | rc = copy_to_user(up, &tmp, sizeof(struct vt_mode)); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 785 | if (rc) |
| 786 | ret = -EFAULT; |
| 787 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | } |
| 789 | |
| 790 | /* |
| 791 | * Returns global vt state. Note that VT 0 is always open, since |
| 792 | * it's an alias for the current VT, and people can't use it here. |
| 793 | * We cannot return state for more than 16 VTs, since v_state is short. |
| 794 | */ |
| 795 | case VT_GETSTATE: |
| 796 | { |
| 797 | struct vt_stat __user *vtstat = up; |
| 798 | unsigned short state, mask; |
| 799 | |
| 800 | if (put_user(fg_console + 1, &vtstat->v_active)) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 801 | ret = -EFAULT; |
| 802 | else { |
| 803 | state = 1; /* /dev/tty0 is always open */ |
| 804 | for (i = 0, mask = 2; i < MAX_NR_CONSOLES && mask; |
| 805 | ++i, mask <<= 1) |
| 806 | if (VT_IS_IN_USE(i)) |
| 807 | state |= mask; |
| 808 | ret = put_user(state, &vtstat->v_state); |
| 809 | } |
| 810 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | } |
| 812 | |
| 813 | /* |
| 814 | * Returns the first available (non-opened) console. |
| 815 | */ |
| 816 | case VT_OPENQRY: |
| 817 | for (i = 0; i < MAX_NR_CONSOLES; ++i) |
| 818 | if (! VT_IS_IN_USE(i)) |
| 819 | break; |
| 820 | ucval = i < MAX_NR_CONSOLES ? (i+1) : -1; |
| 821 | goto setint; |
| 822 | |
| 823 | /* |
| 824 | * ioctl(fd, VT_ACTIVATE, num) will cause us to switch to vt # num, |
| 825 | * with num >= 1 (switches to vt 0, our console, are not allowed, just |
| 826 | * to preserve sanity). |
| 827 | */ |
| 828 | case VT_ACTIVATE: |
| 829 | if (!perm) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 830 | goto eperm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | if (arg == 0 || arg > MAX_NR_CONSOLES) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 832 | ret = -ENXIO; |
| 833 | else { |
| 834 | arg--; |
| 835 | acquire_console_sem(); |
| 836 | ret = vc_allocate(arg); |
| 837 | release_console_sem(); |
| 838 | if (ret) |
| 839 | break; |
| 840 | set_console(arg); |
| 841 | } |
| 842 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | |
| 844 | /* |
| 845 | * wait until the specified VT has been activated |
| 846 | */ |
| 847 | case VT_WAITACTIVE: |
| 848 | if (!perm) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 849 | goto eperm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | if (arg == 0 || arg > MAX_NR_CONSOLES) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 851 | ret = -ENXIO; |
| 852 | else |
| 853 | ret = vt_waitactive(arg - 1); |
| 854 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | |
| 856 | /* |
| 857 | * If a vt is under process control, the kernel will not switch to it |
| 858 | * immediately, but postpone the operation until the process calls this |
| 859 | * ioctl, allowing the switch to complete. |
| 860 | * |
| 861 | * According to the X sources this is the behavior: |
| 862 | * 0: pending switch-from not OK |
| 863 | * 1: pending switch-from OK |
| 864 | * 2: completed switch-to OK |
| 865 | */ |
| 866 | case VT_RELDISP: |
| 867 | if (!perm) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 868 | goto eperm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 870 | if (vc->vt_mode.mode != VT_PROCESS) { |
| 871 | ret = -EINVAL; |
| 872 | break; |
| 873 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | /* |
| 875 | * Switching-from response |
| 876 | */ |
Samuel Ortiz | 8792f96 | 2007-10-01 01:20:12 -0700 | [diff] [blame] | 877 | acquire_console_sem(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | if (vc->vt_newvt >= 0) { |
| 879 | if (arg == 0) |
| 880 | /* |
| 881 | * Switch disallowed, so forget we were trying |
| 882 | * to do it. |
| 883 | */ |
| 884 | vc->vt_newvt = -1; |
| 885 | |
| 886 | else { |
| 887 | /* |
| 888 | * The current vt has been released, so |
| 889 | * complete the switch. |
| 890 | */ |
| 891 | int newvt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | newvt = vc->vt_newvt; |
| 893 | vc->vt_newvt = -1; |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 894 | ret = vc_allocate(newvt); |
| 895 | if (ret) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | release_console_sem(); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 897 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | } |
| 899 | /* |
| 900 | * When we actually do the console switch, |
| 901 | * make sure we are atomic with respect to |
| 902 | * other console switches.. |
| 903 | */ |
| 904 | complete_change_console(vc_cons[newvt].d); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | } |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 906 | } else { |
| 907 | /* |
| 908 | * Switched-to response |
| 909 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | /* |
| 911 | * If it's just an ACK, ignore it |
| 912 | */ |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 913 | if (arg != VT_ACKACQ) |
| 914 | ret = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | } |
Samuel Ortiz | 8792f96 | 2007-10-01 01:20:12 -0700 | [diff] [blame] | 916 | release_console_sem(); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 917 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | |
| 919 | /* |
| 920 | * Disallocate memory associated to VT (but leave VT1) |
| 921 | */ |
| 922 | case VT_DISALLOCATE: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 923 | if (arg > MAX_NR_CONSOLES) { |
| 924 | ret = -ENXIO; |
| 925 | break; |
| 926 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | if (arg == 0) { |
Alan Cox | ca9bda0 | 2006-09-29 02:00:03 -0700 | [diff] [blame] | 928 | /* deallocate all unused consoles, but leave 0 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | acquire_console_sem(); |
| 930 | for (i=1; i<MAX_NR_CONSOLES; i++) |
| 931 | if (! VT_BUSY(i)) |
Alan Cox | ca9bda0 | 2006-09-29 02:00:03 -0700 | [diff] [blame] | 932 | vc_deallocate(i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | release_console_sem(); |
| 934 | } else { |
Alan Cox | ca9bda0 | 2006-09-29 02:00:03 -0700 | [diff] [blame] | 935 | /* deallocate a single console, if possible */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | arg--; |
| 937 | if (VT_BUSY(arg)) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 938 | ret = -EBUSY; |
| 939 | else if (arg) { /* leave 0 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | acquire_console_sem(); |
Alan Cox | ca9bda0 | 2006-09-29 02:00:03 -0700 | [diff] [blame] | 941 | vc_deallocate(arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | release_console_sem(); |
| 943 | } |
| 944 | } |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 945 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | |
| 947 | case VT_RESIZE: |
| 948 | { |
| 949 | struct vt_sizes __user *vtsizes = up; |
Antonino A. Daplas | e400b6e | 2007-10-16 01:29:35 -0700 | [diff] [blame] | 950 | struct vc_data *vc; |
| 951 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | ushort ll,cc; |
| 953 | if (!perm) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 954 | goto eperm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | if (get_user(ll, &vtsizes->v_rows) || |
| 956 | get_user(cc, &vtsizes->v_cols)) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 957 | ret = -EFAULT; |
| 958 | else { |
Alan Cox | 8c9a9dd | 2008-08-15 10:39:38 +0100 | [diff] [blame] | 959 | acquire_console_sem(); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 960 | for (i = 0; i < MAX_NR_CONSOLES; i++) { |
| 961 | vc = vc_cons[i].d; |
Antonino A. Daplas | e400b6e | 2007-10-16 01:29:35 -0700 | [diff] [blame] | 962 | |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 963 | if (vc) { |
| 964 | vc->vc_resize_user = 1; |
Alan Cox | 8c9a9dd | 2008-08-15 10:39:38 +0100 | [diff] [blame] | 965 | vc_resize(vc_cons[i].d, cc, ll); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 966 | } |
Antonino A. Daplas | e400b6e | 2007-10-16 01:29:35 -0700 | [diff] [blame] | 967 | } |
Alan Cox | 8c9a9dd | 2008-08-15 10:39:38 +0100 | [diff] [blame] | 968 | release_console_sem(); |
Antonino A. Daplas | e400b6e | 2007-10-16 01:29:35 -0700 | [diff] [blame] | 969 | } |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 970 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | } |
| 972 | |
| 973 | case VT_RESIZEX: |
| 974 | { |
| 975 | struct vt_consize __user *vtconsize = up; |
| 976 | ushort ll,cc,vlin,clin,vcol,ccol; |
| 977 | if (!perm) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 978 | goto eperm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | if (!access_ok(VERIFY_READ, vtconsize, |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 980 | sizeof(struct vt_consize))) { |
| 981 | ret = -EFAULT; |
| 982 | break; |
| 983 | } |
| 984 | /* FIXME: Should check the copies properly */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | __get_user(ll, &vtconsize->v_rows); |
| 986 | __get_user(cc, &vtconsize->v_cols); |
| 987 | __get_user(vlin, &vtconsize->v_vlin); |
| 988 | __get_user(clin, &vtconsize->v_clin); |
| 989 | __get_user(vcol, &vtconsize->v_vcol); |
| 990 | __get_user(ccol, &vtconsize->v_ccol); |
| 991 | vlin = vlin ? vlin : vc->vc_scan_lines; |
| 992 | if (clin) { |
| 993 | if (ll) { |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 994 | if (ll != vlin/clin) { |
| 995 | /* Parameters don't add up */ |
| 996 | ret = -EINVAL; |
| 997 | break; |
| 998 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | } else |
| 1000 | ll = vlin/clin; |
| 1001 | } |
| 1002 | if (vcol && ccol) { |
| 1003 | if (cc) { |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1004 | if (cc != vcol/ccol) { |
| 1005 | ret = -EINVAL; |
| 1006 | break; |
| 1007 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | } else |
| 1009 | cc = vcol/ccol; |
| 1010 | } |
| 1011 | |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1012 | if (clin > 32) { |
| 1013 | ret = -EINVAL; |
| 1014 | break; |
| 1015 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | |
| 1017 | for (i = 0; i < MAX_NR_CONSOLES; i++) { |
| 1018 | if (!vc_cons[i].d) |
| 1019 | continue; |
| 1020 | acquire_console_sem(); |
| 1021 | if (vlin) |
| 1022 | vc_cons[i].d->vc_scan_lines = vlin; |
| 1023 | if (clin) |
| 1024 | vc_cons[i].d->vc_font.height = clin; |
Antonino A. Daplas | e400b6e | 2007-10-16 01:29:35 -0700 | [diff] [blame] | 1025 | vc_cons[i].d->vc_resize_user = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | vc_resize(vc_cons[i].d, cc, ll); |
| 1027 | release_console_sem(); |
| 1028 | } |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1029 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | } |
| 1031 | |
| 1032 | case PIO_FONT: { |
| 1033 | if (!perm) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1034 | goto eperm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | op.op = KD_FONT_OP_SET; |
| 1036 | op.flags = KD_FONT_FLAG_OLD | KD_FONT_FLAG_DONT_RECALC; /* Compatibility */ |
| 1037 | op.width = 8; |
| 1038 | op.height = 0; |
| 1039 | op.charcount = 256; |
| 1040 | op.data = up; |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1041 | ret = con_font_op(vc_cons[fg_console].d, &op); |
| 1042 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | } |
| 1044 | |
| 1045 | case GIO_FONT: { |
| 1046 | op.op = KD_FONT_OP_GET; |
| 1047 | op.flags = KD_FONT_FLAG_OLD; |
| 1048 | op.width = 8; |
| 1049 | op.height = 32; |
| 1050 | op.charcount = 256; |
| 1051 | op.data = up; |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1052 | ret = con_font_op(vc_cons[fg_console].d, &op); |
| 1053 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | } |
| 1055 | |
| 1056 | case PIO_CMAP: |
| 1057 | if (!perm) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1058 | ret = -EPERM; |
| 1059 | else |
| 1060 | ret = con_set_cmap(up); |
| 1061 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | |
| 1063 | case GIO_CMAP: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1064 | ret = con_get_cmap(up); |
| 1065 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | |
| 1067 | case PIO_FONTX: |
| 1068 | case GIO_FONTX: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1069 | ret = do_fontx_ioctl(cmd, up, perm, &op); |
| 1070 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | |
| 1072 | case PIO_FONTRESET: |
| 1073 | { |
| 1074 | if (!perm) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1075 | goto eperm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | |
| 1077 | #ifdef BROKEN_GRAPHICS_PROGRAMS |
| 1078 | /* With BROKEN_GRAPHICS_PROGRAMS defined, the default |
| 1079 | font is not saved. */ |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1080 | ret = -ENOSYS; |
| 1081 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | #else |
| 1083 | { |
| 1084 | op.op = KD_FONT_OP_SET_DEFAULT; |
| 1085 | op.data = NULL; |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1086 | ret = con_font_op(vc_cons[fg_console].d, &op); |
| 1087 | if (ret) |
| 1088 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | con_set_default_unimap(vc_cons[fg_console].d); |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1090 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | } |
| 1092 | #endif |
| 1093 | } |
| 1094 | |
| 1095 | case KDFONTOP: { |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1096 | if (copy_from_user(&op, up, sizeof(op))) { |
| 1097 | ret = -EFAULT; |
| 1098 | break; |
| 1099 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | if (!perm && op.op != KD_FONT_OP_GET) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1101 | goto eperm; |
| 1102 | ret = con_font_op(vc, &op); |
| 1103 | if (ret) |
| 1104 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | if (copy_to_user(up, &op, sizeof(op))) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1106 | ret = -EFAULT; |
| 1107 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | } |
| 1109 | |
| 1110 | case PIO_SCRNMAP: |
| 1111 | if (!perm) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1112 | ret = -EPERM; |
| 1113 | else |
| 1114 | ret = con_set_trans_old(up); |
| 1115 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | |
| 1117 | case GIO_SCRNMAP: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1118 | ret = con_get_trans_old(up); |
| 1119 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | |
| 1121 | case PIO_UNISCRNMAP: |
| 1122 | if (!perm) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1123 | ret = -EPERM; |
| 1124 | else |
| 1125 | ret = con_set_trans_new(up); |
| 1126 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | |
| 1128 | case GIO_UNISCRNMAP: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1129 | ret = con_get_trans_new(up); |
| 1130 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | |
| 1132 | case PIO_UNIMAPCLR: |
| 1133 | { struct unimapinit ui; |
| 1134 | if (!perm) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1135 | goto eperm; |
| 1136 | ret = copy_from_user(&ui, up, sizeof(struct unimapinit)); |
| 1137 | if (!ret) |
| 1138 | con_clear_unimap(vc, &ui); |
| 1139 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | } |
| 1141 | |
| 1142 | case PIO_UNIMAP: |
| 1143 | case GIO_UNIMAP: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1144 | ret = do_unimap_ioctl(cmd, up, perm, vc); |
| 1145 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | |
| 1147 | case VT_LOCKSWITCH: |
| 1148 | if (!capable(CAP_SYS_TTY_CONFIG)) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1149 | goto eperm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | vt_dont_switch = 1; |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1151 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | case VT_UNLOCKSWITCH: |
| 1153 | if (!capable(CAP_SYS_TTY_CONFIG)) |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1154 | goto eperm; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | vt_dont_switch = 0; |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1156 | break; |
Samuel Thibault | 533475d | 2006-08-27 01:23:39 -0700 | [diff] [blame] | 1157 | case VT_GETHIFONTMASK: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1158 | ret = put_user(vc->vc_hi_font_mask, |
| 1159 | (unsigned short __user *)arg); |
| 1160 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | default: |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1162 | ret = -ENOIOCTLCMD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | } |
Alan Cox | 9cc3c22 | 2008-04-30 00:53:26 -0700 | [diff] [blame] | 1164 | out: |
| 1165 | unlock_kernel(); |
| 1166 | return ret; |
| 1167 | eperm: |
| 1168 | ret = -EPERM; |
| 1169 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | } |
| 1171 | |
| 1172 | /* |
| 1173 | * Sometimes we want to wait until a particular VT has been activated. We |
| 1174 | * do it in a very simple manner. Everybody waits on a single queue and |
| 1175 | * get woken up at once. Those that are satisfied go on with their business, |
| 1176 | * while those not ready go back to sleep. Seems overkill to add a wait |
| 1177 | * to each vt just for this - usually this does nothing! |
| 1178 | */ |
| 1179 | static DECLARE_WAIT_QUEUE_HEAD(vt_activate_queue); |
| 1180 | |
| 1181 | /* |
| 1182 | * Sleeps until a vt is activated, or the task is interrupted. Returns |
Linus Torvalds | 70cb979 | 2007-10-07 16:02:55 -0700 | [diff] [blame] | 1183 | * 0 if activation, -EINTR if interrupted by a signal handler. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1184 | */ |
| 1185 | int vt_waitactive(int vt) |
| 1186 | { |
| 1187 | int retval; |
| 1188 | DECLARE_WAITQUEUE(wait, current); |
| 1189 | |
| 1190 | add_wait_queue(&vt_activate_queue, &wait); |
| 1191 | for (;;) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1192 | retval = 0; |
Michal Januszewski | f991519 | 2007-04-01 23:49:51 -0700 | [diff] [blame] | 1193 | |
| 1194 | /* |
| 1195 | * Synchronize with redraw_screen(). By acquiring the console |
| 1196 | * semaphore we make sure that the console switch is completed |
| 1197 | * before we return. If we didn't wait for the semaphore, we |
| 1198 | * could return at a point where fg_console has already been |
| 1199 | * updated, but the console switch hasn't been completed. |
| 1200 | */ |
| 1201 | acquire_console_sem(); |
| 1202 | set_current_state(TASK_INTERRUPTIBLE); |
| 1203 | if (vt == fg_console) { |
| 1204 | release_console_sem(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | break; |
Michal Januszewski | f991519 | 2007-04-01 23:49:51 -0700 | [diff] [blame] | 1206 | } |
| 1207 | release_console_sem(); |
Linus Torvalds | 70cb979 | 2007-10-07 16:02:55 -0700 | [diff] [blame] | 1208 | retval = -ERESTARTNOHAND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | if (signal_pending(current)) |
| 1210 | break; |
| 1211 | schedule(); |
| 1212 | } |
| 1213 | remove_wait_queue(&vt_activate_queue, &wait); |
Milind Arun Choudhary | cc0a8fb | 2007-05-08 00:30:52 -0700 | [diff] [blame] | 1214 | __set_current_state(TASK_RUNNING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | return retval; |
| 1216 | } |
| 1217 | |
| 1218 | #define vt_wake_waitactive() wake_up(&vt_activate_queue) |
| 1219 | |
| 1220 | void reset_vc(struct vc_data *vc) |
| 1221 | { |
| 1222 | vc->vc_mode = KD_TEXT; |
Bill Nottingham | 2e8ecb9 | 2007-10-16 23:29:38 -0700 | [diff] [blame] | 1223 | kbd_table[vc->vc_num].kbdmode = default_utf8 ? VC_UNICODE : VC_XLATE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | vc->vt_mode.mode = VT_AUTO; |
| 1225 | vc->vt_mode.waitv = 0; |
| 1226 | vc->vt_mode.relsig = 0; |
| 1227 | vc->vt_mode.acqsig = 0; |
| 1228 | vc->vt_mode.frsig = 0; |
Eric W. Biederman | 8b6312f | 2007-02-10 01:44:34 -0800 | [diff] [blame] | 1229 | put_pid(vc->vt_pid); |
| 1230 | vc->vt_pid = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | vc->vt_newvt = -1; |
| 1232 | if (!in_interrupt()) /* Via keyboard.c:SAK() - akpm */ |
| 1233 | reset_palette(vc); |
| 1234 | } |
| 1235 | |
Eric W. Biederman | 8b6312f | 2007-02-10 01:44:34 -0800 | [diff] [blame] | 1236 | void vc_SAK(struct work_struct *work) |
| 1237 | { |
| 1238 | struct vc *vc_con = |
| 1239 | container_of(work, struct vc, SAK_work); |
| 1240 | struct vc_data *vc; |
| 1241 | struct tty_struct *tty; |
| 1242 | |
| 1243 | acquire_console_sem(); |
| 1244 | vc = vc_con->d; |
| 1245 | if (vc) { |
| 1246 | tty = vc->vc_tty; |
| 1247 | /* |
| 1248 | * SAK should also work in all raw modes and reset |
| 1249 | * them properly. |
| 1250 | */ |
| 1251 | if (tty) |
| 1252 | __do_SAK(tty); |
| 1253 | reset_vc(vc); |
| 1254 | } |
| 1255 | release_console_sem(); |
| 1256 | } |
| 1257 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | /* |
| 1259 | * Performs the back end of a vt switch |
| 1260 | */ |
| 1261 | static void complete_change_console(struct vc_data *vc) |
| 1262 | { |
| 1263 | unsigned char old_vc_mode; |
| 1264 | |
| 1265 | last_console = fg_console; |
| 1266 | |
| 1267 | /* |
| 1268 | * If we're switching, we could be going from KD_GRAPHICS to |
| 1269 | * KD_TEXT mode or vice versa, which means we need to blank or |
| 1270 | * unblank the screen later. |
| 1271 | */ |
| 1272 | old_vc_mode = vc_cons[fg_console].d->vc_mode; |
| 1273 | switch_screen(vc); |
| 1274 | |
| 1275 | /* |
Eric W. Biederman | 3dfcaf16 | 2006-12-13 00:34:05 -0800 | [diff] [blame] | 1276 | * This can't appear below a successful kill_pid(). If it did, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | * then the *blank_screen operation could occur while X, having |
| 1278 | * received acqsig, is waking up on another processor. This |
| 1279 | * condition can lead to overlapping accesses to the VGA range |
| 1280 | * and the framebuffer (causing system lockups). |
| 1281 | * |
| 1282 | * To account for this we duplicate this code below only if the |
| 1283 | * controlling process is gone and we've called reset_vc. |
| 1284 | */ |
| 1285 | if (old_vc_mode != vc->vc_mode) { |
| 1286 | if (vc->vc_mode == KD_TEXT) |
| 1287 | do_unblank_screen(1); |
| 1288 | else |
| 1289 | do_blank_screen(1); |
| 1290 | } |
| 1291 | |
| 1292 | /* |
| 1293 | * If this new console is under process control, send it a signal |
| 1294 | * telling it that it has acquired. Also check if it has died and |
| 1295 | * clean up (similar to logic employed in change_console()) |
| 1296 | */ |
| 1297 | if (vc->vt_mode.mode == VT_PROCESS) { |
| 1298 | /* |
Eric W. Biederman | 3dfcaf16 | 2006-12-13 00:34:05 -0800 | [diff] [blame] | 1299 | * Send the signal as privileged - kill_pid() will |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | * tell us if the process has gone or something else |
| 1301 | * is awry |
| 1302 | */ |
Eric W. Biederman | bde0d2c9 | 2006-10-02 02:17:14 -0700 | [diff] [blame] | 1303 | if (kill_pid(vc->vt_pid, vc->vt_mode.acqsig, 1) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | /* |
| 1305 | * The controlling process has died, so we revert back to |
| 1306 | * normal operation. In this case, we'll also change back |
| 1307 | * to KD_TEXT mode. I'm not sure if this is strictly correct |
| 1308 | * but it saves the agony when the X server dies and the screen |
| 1309 | * remains blanked due to KD_GRAPHICS! It would be nice to do |
| 1310 | * this outside of VT_PROCESS but there is no single process |
| 1311 | * to account for and tracking tty count may be undesirable. |
| 1312 | */ |
| 1313 | reset_vc(vc); |
| 1314 | |
| 1315 | if (old_vc_mode != vc->vc_mode) { |
| 1316 | if (vc->vc_mode == KD_TEXT) |
| 1317 | do_unblank_screen(1); |
| 1318 | else |
| 1319 | do_blank_screen(1); |
| 1320 | } |
| 1321 | } |
| 1322 | } |
| 1323 | |
| 1324 | /* |
| 1325 | * Wake anyone waiting for their VT to activate |
| 1326 | */ |
| 1327 | vt_wake_waitactive(); |
| 1328 | return; |
| 1329 | } |
| 1330 | |
| 1331 | /* |
| 1332 | * Performs the front-end of a vt switch |
| 1333 | */ |
| 1334 | void change_console(struct vc_data *new_vc) |
| 1335 | { |
| 1336 | struct vc_data *vc; |
| 1337 | |
| 1338 | if (!new_vc || new_vc->vc_num == fg_console || vt_dont_switch) |
| 1339 | return; |
| 1340 | |
| 1341 | /* |
| 1342 | * If this vt is in process mode, then we need to handshake with |
| 1343 | * that process before switching. Essentially, we store where that |
| 1344 | * vt wants to switch to and wait for it to tell us when it's done |
| 1345 | * (via VT_RELDISP ioctl). |
| 1346 | * |
| 1347 | * We also check to see if the controlling process still exists. |
| 1348 | * If it doesn't, we reset this vt to auto mode and continue. |
| 1349 | * This is a cheap way to track process control. The worst thing |
| 1350 | * that can happen is: we send a signal to a process, it dies, and |
| 1351 | * the switch gets "lost" waiting for a response; hopefully, the |
| 1352 | * user will try again, we'll detect the process is gone (unless |
| 1353 | * the user waits just the right amount of time :-) and revert the |
| 1354 | * vt to auto control. |
| 1355 | */ |
| 1356 | vc = vc_cons[fg_console].d; |
| 1357 | if (vc->vt_mode.mode == VT_PROCESS) { |
| 1358 | /* |
Eric W. Biederman | 3dfcaf16 | 2006-12-13 00:34:05 -0800 | [diff] [blame] | 1359 | * Send the signal as privileged - kill_pid() will |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | * tell us if the process has gone or something else |
Jan Lübbe | a64314e | 2007-09-29 18:47:51 +0200 | [diff] [blame] | 1361 | * is awry. |
| 1362 | * |
| 1363 | * We need to set vt_newvt *before* sending the signal or we |
| 1364 | * have a race. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | */ |
Jan Lübbe | a64314e | 2007-09-29 18:47:51 +0200 | [diff] [blame] | 1366 | vc->vt_newvt = new_vc->vc_num; |
Eric W. Biederman | bde0d2c9 | 2006-10-02 02:17:14 -0700 | [diff] [blame] | 1367 | if (kill_pid(vc->vt_pid, vc->vt_mode.relsig, 1) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1368 | /* |
| 1369 | * It worked. Mark the vt to switch to and |
| 1370 | * return. The process needs to send us a |
| 1371 | * VT_RELDISP ioctl to complete the switch. |
| 1372 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1373 | return; |
| 1374 | } |
| 1375 | |
| 1376 | /* |
| 1377 | * The controlling process has died, so we revert back to |
| 1378 | * normal operation. In this case, we'll also change back |
| 1379 | * to KD_TEXT mode. I'm not sure if this is strictly correct |
| 1380 | * but it saves the agony when the X server dies and the screen |
| 1381 | * remains blanked due to KD_GRAPHICS! It would be nice to do |
| 1382 | * this outside of VT_PROCESS but there is no single process |
| 1383 | * to account for and tracking tty count may be undesirable. |
| 1384 | */ |
| 1385 | reset_vc(vc); |
| 1386 | |
| 1387 | /* |
| 1388 | * Fall through to normal (VT_AUTO) handling of the switch... |
| 1389 | */ |
| 1390 | } |
| 1391 | |
| 1392 | /* |
| 1393 | * Ignore all switches in KD_GRAPHICS+VT_AUTO mode |
| 1394 | */ |
| 1395 | if (vc->vc_mode == KD_GRAPHICS) |
| 1396 | return; |
| 1397 | |
| 1398 | complete_change_console(new_vc); |
| 1399 | } |