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Commit | Line | Data |
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1da177e4 LT |
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 | ||
1da177e4 LT |
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> | |
04c71976 | 26 | #include <linux/consolemap.h> |
7ed20e1a | 27 | #include <linux/signal.h> |
405f5571 | 28 | #include <linux/smp_lock.h> |
bcc8ca09 | 29 | #include <linux/timex.h> |
1da177e4 LT |
30 | |
31 | #include <asm/io.h> | |
32 | #include <asm/uaccess.h> | |
33 | ||
34 | #include <linux/kbd_kern.h> | |
35 | #include <linux/vt_kern.h> | |
36 | #include <linux/kbd_diacr.h> | |
37 | #include <linux/selection.h> | |
38 | ||
b257bc05 | 39 | char vt_dont_switch; |
1da177e4 LT |
40 | extern struct tty_driver *console_driver; |
41 | ||
42 | #define VT_IS_IN_USE(i) (console_driver->ttys[i] && console_driver->ttys[i]->count) | |
43 | #define VT_BUSY(i) (VT_IS_IN_USE(i) || i == fg_console || vc_cons[i].d == sel_cons) | |
44 | ||
45 | /* | |
46 | * Console (vt and kd) routines, as defined by USL SVR4 manual, and by | |
47 | * experimentation and study of X386 SYSV handling. | |
48 | * | |
49 | * One point of difference: SYSV vt's are /dev/vtX, which X >= 0, and | |
50 | * /dev/console is a separate ttyp. Under Linux, /dev/tty0 is /dev/console, | |
51 | * and the vc start at /dev/ttyX, X >= 1. We maintain that here, so we will | |
52 | * always treat our set of vt as numbered 1..MAX_NR_CONSOLES (corresponding to | |
53 | * ttys 0..MAX_NR_CONSOLES-1). Explicitly naming VT 0 is illegal, but using | |
54 | * /dev/tty0 (fg_console) as a target is legal, since an implicit aliasing | |
55 | * to the current console is done by the main ioctl code. | |
56 | */ | |
57 | ||
58 | #ifdef CONFIG_X86 | |
59 | #include <linux/syscalls.h> | |
60 | #endif | |
61 | ||
62 | static void complete_change_console(struct vc_data *vc); | |
63 | ||
64 | /* | |
65 | * these are the valid i/o ports we're allowed to change. they map all the | |
66 | * video ports | |
67 | */ | |
68 | #define GPFIRST 0x3b4 | |
69 | #define GPLAST 0x3df | |
70 | #define GPNUM (GPLAST - GPFIRST + 1) | |
71 | ||
72 | #define i (tmp.kb_index) | |
73 | #define s (tmp.kb_table) | |
74 | #define v (tmp.kb_value) | |
75 | static inline int | |
76 | do_kdsk_ioctl(int cmd, struct kbentry __user *user_kbe, int perm, struct kbd_struct *kbd) | |
77 | { | |
78 | struct kbentry tmp; | |
79 | ushort *key_map, val, ov; | |
80 | ||
81 | if (copy_from_user(&tmp, user_kbe, sizeof(struct kbentry))) | |
82 | return -EFAULT; | |
83 | ||
e3f17f0f MT |
84 | if (!capable(CAP_SYS_TTY_CONFIG)) |
85 | perm = 0; | |
86 | ||
1da177e4 LT |
87 | switch (cmd) { |
88 | case KDGKBENT: | |
89 | key_map = key_maps[s]; | |
90 | if (key_map) { | |
91 | val = U(key_map[i]); | |
92 | if (kbd->kbdmode != VC_UNICODE && KTYP(val) >= NR_TYPES) | |
93 | val = K_HOLE; | |
94 | } else | |
95 | val = (i ? K_HOLE : K_NOSUCHMAP); | |
96 | return put_user(val, &user_kbe->kb_value); | |
97 | case KDSKBENT: | |
98 | if (!perm) | |
99 | return -EPERM; | |
100 | if (!i && v == K_NOSUCHMAP) { | |
ca9bda00 | 101 | /* deallocate map */ |
1da177e4 LT |
102 | key_map = key_maps[s]; |
103 | if (s && key_map) { | |
104 | key_maps[s] = NULL; | |
105 | if (key_map[0] == U(K_ALLOCATED)) { | |
106 | kfree(key_map); | |
107 | keymap_count--; | |
108 | } | |
109 | } | |
110 | break; | |
111 | } | |
112 | ||
113 | if (KTYP(v) < NR_TYPES) { | |
114 | if (KVAL(v) > max_vals[KTYP(v)]) | |
115 | return -EINVAL; | |
116 | } else | |
117 | if (kbd->kbdmode != VC_UNICODE) | |
118 | return -EINVAL; | |
119 | ||
120 | /* ++Geert: non-PC keyboards may generate keycode zero */ | |
121 | #if !defined(__mc68000__) && !defined(__powerpc__) | |
122 | /* assignment to entry 0 only tests validity of args */ | |
123 | if (!i) | |
124 | break; | |
125 | #endif | |
126 | ||
127 | if (!(key_map = key_maps[s])) { | |
128 | int j; | |
129 | ||
130 | if (keymap_count >= MAX_NR_OF_USER_KEYMAPS && | |
131 | !capable(CAP_SYS_RESOURCE)) | |
132 | return -EPERM; | |
133 | ||
5cbded58 | 134 | key_map = kmalloc(sizeof(plain_map), |
1da177e4 LT |
135 | GFP_KERNEL); |
136 | if (!key_map) | |
137 | return -ENOMEM; | |
138 | key_maps[s] = key_map; | |
139 | key_map[0] = U(K_ALLOCATED); | |
140 | for (j = 1; j < NR_KEYS; j++) | |
141 | key_map[j] = U(K_HOLE); | |
142 | keymap_count++; | |
143 | } | |
144 | ov = U(key_map[i]); | |
145 | if (v == ov) | |
146 | break; /* nothing to do */ | |
147 | /* | |
148 | * Attention Key. | |
149 | */ | |
150 | if (((ov == K_SAK) || (v == K_SAK)) && !capable(CAP_SYS_ADMIN)) | |
151 | return -EPERM; | |
152 | key_map[i] = U(v); | |
153 | if (!s && (KTYP(ov) == KT_SHIFT || KTYP(v) == KT_SHIFT)) | |
154 | compute_shiftstate(); | |
155 | break; | |
156 | } | |
157 | return 0; | |
158 | } | |
159 | #undef i | |
160 | #undef s | |
161 | #undef v | |
162 | ||
163 | static inline int | |
164 | do_kbkeycode_ioctl(int cmd, struct kbkeycode __user *user_kbkc, int perm) | |
165 | { | |
166 | struct kbkeycode tmp; | |
167 | int kc = 0; | |
168 | ||
169 | if (copy_from_user(&tmp, user_kbkc, sizeof(struct kbkeycode))) | |
170 | return -EFAULT; | |
171 | switch (cmd) { | |
172 | case KDGETKEYCODE: | |
173 | kc = getkeycode(tmp.scancode); | |
174 | if (kc >= 0) | |
175 | kc = put_user(kc, &user_kbkc->keycode); | |
176 | break; | |
177 | case KDSETKEYCODE: | |
178 | if (!perm) | |
179 | return -EPERM; | |
180 | kc = setkeycode(tmp.scancode, tmp.keycode); | |
181 | break; | |
182 | } | |
183 | return kc; | |
184 | } | |
185 | ||
186 | static inline int | |
187 | do_kdgkb_ioctl(int cmd, struct kbsentry __user *user_kdgkb, int perm) | |
188 | { | |
189 | struct kbsentry *kbs; | |
190 | char *p; | |
191 | u_char *q; | |
192 | u_char __user *up; | |
193 | int sz; | |
194 | int delta; | |
195 | char *first_free, *fj, *fnw; | |
196 | int i, j, k; | |
197 | int ret; | |
198 | ||
0b360adb | 199 | if (!capable(CAP_SYS_TTY_CONFIG)) |
e3f17f0f | 200 | perm = 0; |
0b360adb | 201 | |
1da177e4 LT |
202 | kbs = kmalloc(sizeof(*kbs), GFP_KERNEL); |
203 | if (!kbs) { | |
204 | ret = -ENOMEM; | |
205 | goto reterr; | |
206 | } | |
207 | ||
208 | /* we mostly copy too much here (512bytes), but who cares ;) */ | |
209 | if (copy_from_user(kbs, user_kdgkb, sizeof(struct kbsentry))) { | |
210 | ret = -EFAULT; | |
211 | goto reterr; | |
212 | } | |
213 | kbs->kb_string[sizeof(kbs->kb_string)-1] = '\0'; | |
214 | i = kbs->kb_func; | |
215 | ||
216 | switch (cmd) { | |
217 | case KDGKBSENT: | |
218 | sz = sizeof(kbs->kb_string) - 1; /* sz should have been | |
219 | a struct member */ | |
220 | up = user_kdgkb->kb_string; | |
221 | p = func_table[i]; | |
222 | if(p) | |
223 | for ( ; *p && sz; p++, sz--) | |
224 | if (put_user(*p, up++)) { | |
225 | ret = -EFAULT; | |
226 | goto reterr; | |
227 | } | |
228 | if (put_user('\0', up)) { | |
229 | ret = -EFAULT; | |
230 | goto reterr; | |
231 | } | |
232 | kfree(kbs); | |
233 | return ((p && *p) ? -EOVERFLOW : 0); | |
234 | case KDSKBSENT: | |
235 | if (!perm) { | |
236 | ret = -EPERM; | |
237 | goto reterr; | |
238 | } | |
239 | ||
240 | q = func_table[i]; | |
241 | first_free = funcbufptr + (funcbufsize - funcbufleft); | |
242 | for (j = i+1; j < MAX_NR_FUNC && !func_table[j]; j++) | |
243 | ; | |
244 | if (j < MAX_NR_FUNC) | |
245 | fj = func_table[j]; | |
246 | else | |
247 | fj = first_free; | |
248 | ||
249 | delta = (q ? -strlen(q) : 1) + strlen(kbs->kb_string); | |
250 | if (delta <= funcbufleft) { /* it fits in current buf */ | |
251 | if (j < MAX_NR_FUNC) { | |
252 | memmove(fj + delta, fj, first_free - fj); | |
253 | for (k = j; k < MAX_NR_FUNC; k++) | |
254 | if (func_table[k]) | |
255 | func_table[k] += delta; | |
256 | } | |
257 | if (!q) | |
258 | func_table[i] = fj; | |
259 | funcbufleft -= delta; | |
260 | } else { /* allocate a larger buffer */ | |
261 | sz = 256; | |
262 | while (sz < funcbufsize - funcbufleft + delta) | |
263 | sz <<= 1; | |
5cbded58 | 264 | fnw = kmalloc(sz, GFP_KERNEL); |
1da177e4 LT |
265 | if(!fnw) { |
266 | ret = -ENOMEM; | |
267 | goto reterr; | |
268 | } | |
269 | ||
270 | if (!q) | |
271 | func_table[i] = fj; | |
272 | if (fj > funcbufptr) | |
273 | memmove(fnw, funcbufptr, fj - funcbufptr); | |
274 | for (k = 0; k < j; k++) | |
275 | if (func_table[k]) | |
276 | func_table[k] = fnw + (func_table[k] - funcbufptr); | |
277 | ||
278 | if (first_free > fj) { | |
279 | memmove(fnw + (fj - funcbufptr) + delta, fj, first_free - fj); | |
280 | for (k = j; k < MAX_NR_FUNC; k++) | |
281 | if (func_table[k]) | |
282 | func_table[k] = fnw + (func_table[k] - funcbufptr) + delta; | |
283 | } | |
284 | if (funcbufptr != func_buf) | |
285 | kfree(funcbufptr); | |
286 | funcbufptr = fnw; | |
287 | funcbufleft = funcbufleft - delta + sz - funcbufsize; | |
288 | funcbufsize = sz; | |
289 | } | |
290 | strcpy(func_table[i], kbs->kb_string); | |
291 | break; | |
292 | } | |
293 | ret = 0; | |
294 | reterr: | |
295 | kfree(kbs); | |
296 | return ret; | |
297 | } | |
298 | ||
299 | static inline int | |
300 | do_fontx_ioctl(int cmd, struct consolefontdesc __user *user_cfd, int perm, struct console_font_op *op) | |
301 | { | |
302 | struct consolefontdesc cfdarg; | |
303 | int i; | |
304 | ||
305 | if (copy_from_user(&cfdarg, user_cfd, sizeof(struct consolefontdesc))) | |
306 | return -EFAULT; | |
307 | ||
308 | switch (cmd) { | |
309 | case PIO_FONTX: | |
310 | if (!perm) | |
311 | return -EPERM; | |
312 | op->op = KD_FONT_OP_SET; | |
313 | op->flags = KD_FONT_FLAG_OLD; | |
314 | op->width = 8; | |
315 | op->height = cfdarg.charheight; | |
316 | op->charcount = cfdarg.charcount; | |
317 | op->data = cfdarg.chardata; | |
318 | return con_font_op(vc_cons[fg_console].d, op); | |
319 | case GIO_FONTX: { | |
320 | op->op = KD_FONT_OP_GET; | |
321 | op->flags = KD_FONT_FLAG_OLD; | |
322 | op->width = 8; | |
323 | op->height = cfdarg.charheight; | |
324 | op->charcount = cfdarg.charcount; | |
325 | op->data = cfdarg.chardata; | |
326 | i = con_font_op(vc_cons[fg_console].d, op); | |
327 | if (i) | |
328 | return i; | |
329 | cfdarg.charheight = op->height; | |
330 | cfdarg.charcount = op->charcount; | |
331 | if (copy_to_user(user_cfd, &cfdarg, sizeof(struct consolefontdesc))) | |
332 | return -EFAULT; | |
333 | return 0; | |
334 | } | |
335 | } | |
336 | return -EINVAL; | |
337 | } | |
338 | ||
339 | static inline int | |
340 | do_unimap_ioctl(int cmd, struct unimapdesc __user *user_ud, int perm, struct vc_data *vc) | |
341 | { | |
342 | struct unimapdesc tmp; | |
343 | ||
344 | if (copy_from_user(&tmp, user_ud, sizeof tmp)) | |
345 | return -EFAULT; | |
346 | if (tmp.entries) | |
347 | if (!access_ok(VERIFY_WRITE, tmp.entries, | |
348 | tmp.entry_ct*sizeof(struct unipair))) | |
349 | return -EFAULT; | |
350 | switch (cmd) { | |
351 | case PIO_UNIMAP: | |
352 | if (!perm) | |
353 | return -EPERM; | |
354 | return con_set_unimap(vc, tmp.entry_ct, tmp.entries); | |
355 | case GIO_UNIMAP: | |
356 | if (!perm && fg_console != vc->vc_num) | |
357 | return -EPERM; | |
358 | return con_get_unimap(vc, tmp.entry_ct, &(user_ud->entry_ct), tmp.entries); | |
359 | } | |
360 | return 0; | |
361 | } | |
362 | ||
363 | /* | |
364 | * We handle the console-specific ioctl's here. We allow the | |
365 | * capability to modify any console, not just the fg_console. | |
366 | */ | |
367 | int vt_ioctl(struct tty_struct *tty, struct file * file, | |
368 | unsigned int cmd, unsigned long arg) | |
369 | { | |
c9f19e96 | 370 | struct vc_data *vc = tty->driver_data; |
1da177e4 LT |
371 | struct console_font_op op; /* used in multiple places here */ |
372 | struct kbd_struct * kbd; | |
373 | unsigned int console; | |
374 | unsigned char ucval; | |
375 | void __user *up = (void __user *)arg; | |
376 | int i, perm; | |
9cc3c22b AC |
377 | int ret = 0; |
378 | ||
1da177e4 LT |
379 | console = vc->vc_num; |
380 | ||
9cc3c22b AC |
381 | lock_kernel(); |
382 | ||
383 | if (!vc_cons_allocated(console)) { /* impossible? */ | |
384 | ret = -ENOIOCTLCMD; | |
385 | goto out; | |
386 | } | |
387 | ||
1da177e4 LT |
388 | |
389 | /* | |
390 | * To have permissions to do most of the vt ioctls, we either have | |
391 | * to be the owner of the tty, or have CAP_SYS_TTY_CONFIG. | |
392 | */ | |
393 | perm = 0; | |
394 | if (current->signal->tty == tty || capable(CAP_SYS_TTY_CONFIG)) | |
395 | perm = 1; | |
396 | ||
397 | kbd = kbd_table + console; | |
398 | switch (cmd) { | |
e6885107 | 399 | case TIOCLINUX: |
a115902f JS |
400 | ret = tioclinux(tty, arg); |
401 | break; | |
1da177e4 LT |
402 | case KIOCSOUND: |
403 | if (!perm) | |
9cc3c22b | 404 | goto eperm; |
fab89223 AC |
405 | /* FIXME: This is an old broken API but we need to keep it |
406 | supported and somehow separate the historic advertised | |
407 | tick rate from any real one */ | |
1da177e4 | 408 | if (arg) |
bcc8ca09 | 409 | arg = CLOCK_TICK_RATE / arg; |
1da177e4 | 410 | kd_mksound(arg, 0); |
9cc3c22b | 411 | break; |
1da177e4 LT |
412 | |
413 | case KDMKTONE: | |
414 | if (!perm) | |
9cc3c22b | 415 | goto eperm; |
1da177e4 LT |
416 | { |
417 | unsigned int ticks, count; | |
418 | ||
419 | /* | |
420 | * Generate the tone for the appropriate number of ticks. | |
421 | * If the time is zero, turn off sound ourselves. | |
422 | */ | |
423 | ticks = HZ * ((arg >> 16) & 0xffff) / 1000; | |
424 | count = ticks ? (arg & 0xffff) : 0; | |
fab89223 AC |
425 | /* FIXME: This is an old broken API but we need to keep it |
426 | supported and somehow separate the historic advertised | |
427 | tick rate from any real one */ | |
1da177e4 | 428 | if (count) |
bcc8ca09 | 429 | count = CLOCK_TICK_RATE / count; |
1da177e4 | 430 | kd_mksound(count, ticks); |
9cc3c22b | 431 | break; |
1da177e4 LT |
432 | } |
433 | ||
434 | case KDGKBTYPE: | |
435 | /* | |
436 | * this is naive. | |
437 | */ | |
438 | ucval = KB_101; | |
439 | goto setchar; | |
440 | ||
441 | /* | |
442 | * These cannot be implemented on any machine that implements | |
443 | * ioperm() in user level (such as Alpha PCs) or not at all. | |
444 | * | |
445 | * XXX: you should never use these, just call ioperm directly.. | |
446 | */ | |
447 | #ifdef CONFIG_X86 | |
448 | case KDADDIO: | |
449 | case KDDELIO: | |
450 | /* | |
451 | * KDADDIO and KDDELIO may be able to add ports beyond what | |
452 | * we reject here, but to be safe... | |
453 | */ | |
9cc3c22b AC |
454 | if (arg < GPFIRST || arg > GPLAST) { |
455 | ret = -EINVAL; | |
456 | break; | |
457 | } | |
458 | ret = sys_ioperm(arg, 1, (cmd == KDADDIO)) ? -ENXIO : 0; | |
459 | break; | |
1da177e4 LT |
460 | |
461 | case KDENABIO: | |
462 | case KDDISABIO: | |
9cc3c22b | 463 | ret = sys_ioperm(GPFIRST, GPNUM, |
1da177e4 | 464 | (cmd == KDENABIO)) ? -ENXIO : 0; |
9cc3c22b | 465 | break; |
1da177e4 LT |
466 | #endif |
467 | ||
468 | /* Linux m68k/i386 interface for setting the keyboard delay/repeat rate */ | |
469 | ||
470 | case KDKBDREP: | |
471 | { | |
472 | struct kbd_repeat kbrep; | |
1da177e4 LT |
473 | |
474 | if (!capable(CAP_SYS_TTY_CONFIG)) | |
9cc3c22b | 475 | goto eperm; |
1da177e4 | 476 | |
9cc3c22b AC |
477 | if (copy_from_user(&kbrep, up, sizeof(struct kbd_repeat))) { |
478 | ret = -EFAULT; | |
479 | break; | |
480 | } | |
481 | ret = kbd_rate(&kbrep); | |
482 | if (ret) | |
483 | break; | |
1da177e4 | 484 | if (copy_to_user(up, &kbrep, sizeof(struct kbd_repeat))) |
9cc3c22b AC |
485 | ret = -EFAULT; |
486 | break; | |
1da177e4 LT |
487 | } |
488 | ||
489 | case KDSETMODE: | |
490 | /* | |
491 | * currently, setting the mode from KD_TEXT to KD_GRAPHICS | |
492 | * doesn't do a whole lot. i'm not sure if it should do any | |
493 | * restoration of modes or what... | |
494 | * | |
495 | * XXX It should at least call into the driver, fbdev's definitely | |
496 | * need to restore their engine state. --BenH | |
497 | */ | |
498 | if (!perm) | |
9cc3c22b | 499 | goto eperm; |
1da177e4 LT |
500 | switch (arg) { |
501 | case KD_GRAPHICS: | |
502 | break; | |
503 | case KD_TEXT0: | |
504 | case KD_TEXT1: | |
505 | arg = KD_TEXT; | |
506 | case KD_TEXT: | |
507 | break; | |
508 | default: | |
9cc3c22b AC |
509 | ret = -EINVAL; |
510 | goto out; | |
1da177e4 LT |
511 | } |
512 | if (vc->vc_mode == (unsigned char) arg) | |
9cc3c22b | 513 | break; |
1da177e4 LT |
514 | vc->vc_mode = (unsigned char) arg; |
515 | if (console != fg_console) | |
9cc3c22b | 516 | break; |
1da177e4 LT |
517 | /* |
518 | * explicitly blank/unblank the screen if switching modes | |
519 | */ | |
520 | acquire_console_sem(); | |
521 | if (arg == KD_TEXT) | |
522 | do_unblank_screen(1); | |
523 | else | |
524 | do_blank_screen(1); | |
525 | release_console_sem(); | |
9cc3c22b | 526 | break; |
1da177e4 LT |
527 | |
528 | case KDGETMODE: | |
529 | ucval = vc->vc_mode; | |
530 | goto setint; | |
531 | ||
532 | case KDMAPDISP: | |
533 | case KDUNMAPDISP: | |
534 | /* | |
535 | * these work like a combination of mmap and KDENABIO. | |
536 | * this could be easily finished. | |
537 | */ | |
9cc3c22b AC |
538 | ret = -EINVAL; |
539 | break; | |
1da177e4 LT |
540 | |
541 | case KDSKBMODE: | |
542 | if (!perm) | |
9cc3c22b | 543 | goto eperm; |
1da177e4 LT |
544 | switch(arg) { |
545 | case K_RAW: | |
546 | kbd->kbdmode = VC_RAW; | |
547 | break; | |
548 | case K_MEDIUMRAW: | |
549 | kbd->kbdmode = VC_MEDIUMRAW; | |
550 | break; | |
551 | case K_XLATE: | |
552 | kbd->kbdmode = VC_XLATE; | |
553 | compute_shiftstate(); | |
554 | break; | |
555 | case K_UNICODE: | |
556 | kbd->kbdmode = VC_UNICODE; | |
557 | compute_shiftstate(); | |
558 | break; | |
559 | default: | |
9cc3c22b AC |
560 | ret = -EINVAL; |
561 | goto out; | |
1da177e4 LT |
562 | } |
563 | tty_ldisc_flush(tty); | |
9cc3c22b | 564 | break; |
1da177e4 LT |
565 | |
566 | case KDGKBMODE: | |
567 | ucval = ((kbd->kbdmode == VC_RAW) ? K_RAW : | |
568 | (kbd->kbdmode == VC_MEDIUMRAW) ? K_MEDIUMRAW : | |
569 | (kbd->kbdmode == VC_UNICODE) ? K_UNICODE : | |
570 | K_XLATE); | |
571 | goto setint; | |
572 | ||
573 | /* this could be folded into KDSKBMODE, but for compatibility | |
574 | reasons it is not so easy to fold KDGKBMETA into KDGKBMODE */ | |
575 | case KDSKBMETA: | |
576 | switch(arg) { | |
577 | case K_METABIT: | |
578 | clr_vc_kbd_mode(kbd, VC_META); | |
579 | break; | |
580 | case K_ESCPREFIX: | |
581 | set_vc_kbd_mode(kbd, VC_META); | |
582 | break; | |
583 | default: | |
9cc3c22b | 584 | ret = -EINVAL; |
1da177e4 | 585 | } |
9cc3c22b | 586 | break; |
1da177e4 LT |
587 | |
588 | case KDGKBMETA: | |
589 | ucval = (vc_kbd_mode(kbd, VC_META) ? K_ESCPREFIX : K_METABIT); | |
590 | setint: | |
9cc3c22b AC |
591 | ret = put_user(ucval, (int __user *)arg); |
592 | break; | |
1da177e4 LT |
593 | |
594 | case KDGETKEYCODE: | |
595 | case KDSETKEYCODE: | |
596 | if(!capable(CAP_SYS_TTY_CONFIG)) | |
9cc3c22b AC |
597 | perm = 0; |
598 | ret = do_kbkeycode_ioctl(cmd, up, perm); | |
599 | break; | |
1da177e4 LT |
600 | |
601 | case KDGKBENT: | |
602 | case KDSKBENT: | |
9cc3c22b AC |
603 | ret = do_kdsk_ioctl(cmd, up, perm, kbd); |
604 | break; | |
1da177e4 LT |
605 | |
606 | case KDGKBSENT: | |
607 | case KDSKBSENT: | |
9cc3c22b AC |
608 | ret = do_kdgkb_ioctl(cmd, up, perm); |
609 | break; | |
1da177e4 LT |
610 | |
611 | case KDGKBDIACR: | |
612 | { | |
613 | struct kbdiacrs __user *a = up; | |
04c71976 ST |
614 | struct kbdiacr diacr; |
615 | int i; | |
1da177e4 | 616 | |
9cc3c22b AC |
617 | if (put_user(accent_table_size, &a->kb_cnt)) { |
618 | ret = -EFAULT; | |
619 | break; | |
620 | } | |
04c71976 ST |
621 | for (i = 0; i < accent_table_size; i++) { |
622 | diacr.diacr = conv_uni_to_8bit(accent_table[i].diacr); | |
623 | diacr.base = conv_uni_to_8bit(accent_table[i].base); | |
624 | diacr.result = conv_uni_to_8bit(accent_table[i].result); | |
9cc3c22b AC |
625 | if (copy_to_user(a->kbdiacr + i, &diacr, sizeof(struct kbdiacr))) { |
626 | ret = -EFAULT; | |
627 | break; | |
628 | } | |
04c71976 | 629 | } |
9cc3c22b | 630 | break; |
04c71976 ST |
631 | } |
632 | case KDGKBDIACRUC: | |
633 | { | |
634 | struct kbdiacrsuc __user *a = up; | |
635 | ||
636 | if (put_user(accent_table_size, &a->kb_cnt)) | |
9cc3c22b AC |
637 | ret = -EFAULT; |
638 | else if (copy_to_user(a->kbdiacruc, accent_table, | |
639 | accent_table_size*sizeof(struct kbdiacruc))) | |
640 | ret = -EFAULT; | |
641 | break; | |
1da177e4 LT |
642 | } |
643 | ||
644 | case KDSKBDIACR: | |
645 | { | |
646 | struct kbdiacrs __user *a = up; | |
04c71976 ST |
647 | struct kbdiacr diacr; |
648 | unsigned int ct; | |
649 | int i; | |
650 | ||
651 | if (!perm) | |
9cc3c22b AC |
652 | goto eperm; |
653 | if (get_user(ct,&a->kb_cnt)) { | |
654 | ret = -EFAULT; | |
655 | break; | |
656 | } | |
657 | if (ct >= MAX_DIACR) { | |
658 | ret = -EINVAL; | |
659 | break; | |
660 | } | |
04c71976 ST |
661 | accent_table_size = ct; |
662 | for (i = 0; i < ct; i++) { | |
9cc3c22b AC |
663 | if (copy_from_user(&diacr, a->kbdiacr + i, sizeof(struct kbdiacr))) { |
664 | ret = -EFAULT; | |
665 | break; | |
666 | } | |
04c71976 ST |
667 | accent_table[i].diacr = conv_8bit_to_uni(diacr.diacr); |
668 | accent_table[i].base = conv_8bit_to_uni(diacr.base); | |
669 | accent_table[i].result = conv_8bit_to_uni(diacr.result); | |
670 | } | |
9cc3c22b | 671 | break; |
04c71976 ST |
672 | } |
673 | ||
674 | case KDSKBDIACRUC: | |
675 | { | |
676 | struct kbdiacrsuc __user *a = up; | |
1da177e4 LT |
677 | unsigned int ct; |
678 | ||
679 | if (!perm) | |
9cc3c22b AC |
680 | goto eperm; |
681 | if (get_user(ct,&a->kb_cnt)) { | |
682 | ret = -EFAULT; | |
683 | break; | |
684 | } | |
685 | if (ct >= MAX_DIACR) { | |
686 | ret = -EINVAL; | |
687 | break; | |
688 | } | |
1da177e4 | 689 | accent_table_size = ct; |
04c71976 | 690 | if (copy_from_user(accent_table, a->kbdiacruc, ct*sizeof(struct kbdiacruc))) |
9cc3c22b AC |
691 | ret = -EFAULT; |
692 | break; | |
1da177e4 LT |
693 | } |
694 | ||
695 | /* the ioctls below read/set the flags usually shown in the leds */ | |
696 | /* don't use them - they will go away without warning */ | |
697 | case KDGKBLED: | |
698 | ucval = kbd->ledflagstate | (kbd->default_ledflagstate << 4); | |
699 | goto setchar; | |
700 | ||
701 | case KDSKBLED: | |
702 | if (!perm) | |
9cc3c22b AC |
703 | goto eperm; |
704 | if (arg & ~0x77) { | |
705 | ret = -EINVAL; | |
706 | break; | |
707 | } | |
1da177e4 LT |
708 | kbd->ledflagstate = (arg & 7); |
709 | kbd->default_ledflagstate = ((arg >> 4) & 7); | |
710 | set_leds(); | |
9cc3c22b | 711 | break; |
1da177e4 LT |
712 | |
713 | /* the ioctls below only set the lights, not the functions */ | |
714 | /* for those, see KDGKBLED and KDSKBLED above */ | |
715 | case KDGETLED: | |
716 | ucval = getledstate(); | |
717 | setchar: | |
9cc3c22b AC |
718 | ret = put_user(ucval, (char __user *)arg); |
719 | break; | |
1da177e4 LT |
720 | |
721 | case KDSETLED: | |
722 | if (!perm) | |
9cc3c22b | 723 | goto eperm; |
1da177e4 | 724 | setledstate(kbd, arg); |
9cc3c22b | 725 | break; |
1da177e4 LT |
726 | |
727 | /* | |
728 | * A process can indicate its willingness to accept signals | |
729 | * generated by pressing an appropriate key combination. | |
730 | * Thus, one can have a daemon that e.g. spawns a new console | |
731 | * upon a keypress and then changes to it. | |
732 | * See also the kbrequest field of inittab(5). | |
733 | */ | |
734 | case KDSIGACCEPT: | |
735 | { | |
1da177e4 | 736 | if (!perm || !capable(CAP_KILL)) |
9cc3c22b | 737 | goto eperm; |
7ed20e1a | 738 | if (!valid_signal(arg) || arg < 1 || arg == SIGKILL) |
9cc3c22b AC |
739 | ret = -EINVAL; |
740 | else { | |
741 | spin_lock_irq(&vt_spawn_con.lock); | |
742 | put_pid(vt_spawn_con.pid); | |
743 | vt_spawn_con.pid = get_pid(task_pid(current)); | |
744 | vt_spawn_con.sig = arg; | |
745 | spin_unlock_irq(&vt_spawn_con.lock); | |
746 | } | |
747 | break; | |
1da177e4 LT |
748 | } |
749 | ||
750 | case VT_SETMODE: | |
751 | { | |
752 | struct vt_mode tmp; | |
753 | ||
754 | if (!perm) | |
9cc3c22b AC |
755 | goto eperm; |
756 | if (copy_from_user(&tmp, up, sizeof(struct vt_mode))) { | |
757 | ret = -EFAULT; | |
758 | goto out; | |
759 | } | |
760 | if (tmp.mode != VT_AUTO && tmp.mode != VT_PROCESS) { | |
761 | ret = -EINVAL; | |
762 | goto out; | |
763 | } | |
1da177e4 LT |
764 | acquire_console_sem(); |
765 | vc->vt_mode = tmp; | |
766 | /* the frsig is ignored, so we set it to 0 */ | |
767 | vc->vt_mode.frsig = 0; | |
8b6312f4 EB |
768 | put_pid(vc->vt_pid); |
769 | vc->vt_pid = get_pid(task_pid(current)); | |
1da177e4 LT |
770 | /* no switch is required -- saw@shade.msu.ru */ |
771 | vc->vt_newvt = -1; | |
772 | release_console_sem(); | |
9cc3c22b | 773 | break; |
1da177e4 LT |
774 | } |
775 | ||
776 | case VT_GETMODE: | |
777 | { | |
778 | struct vt_mode tmp; | |
779 | int rc; | |
780 | ||
781 | acquire_console_sem(); | |
782 | memcpy(&tmp, &vc->vt_mode, sizeof(struct vt_mode)); | |
783 | release_console_sem(); | |
784 | ||
785 | rc = copy_to_user(up, &tmp, sizeof(struct vt_mode)); | |
9cc3c22b AC |
786 | if (rc) |
787 | ret = -EFAULT; | |
788 | break; | |
1da177e4 LT |
789 | } |
790 | ||
791 | /* | |
792 | * Returns global vt state. Note that VT 0 is always open, since | |
793 | * it's an alias for the current VT, and people can't use it here. | |
794 | * We cannot return state for more than 16 VTs, since v_state is short. | |
795 | */ | |
796 | case VT_GETSTATE: | |
797 | { | |
798 | struct vt_stat __user *vtstat = up; | |
799 | unsigned short state, mask; | |
800 | ||
801 | if (put_user(fg_console + 1, &vtstat->v_active)) | |
9cc3c22b AC |
802 | ret = -EFAULT; |
803 | else { | |
804 | state = 1; /* /dev/tty0 is always open */ | |
805 | for (i = 0, mask = 2; i < MAX_NR_CONSOLES && mask; | |
806 | ++i, mask <<= 1) | |
807 | if (VT_IS_IN_USE(i)) | |
808 | state |= mask; | |
809 | ret = put_user(state, &vtstat->v_state); | |
810 | } | |
811 | break; | |
1da177e4 LT |
812 | } |
813 | ||
814 | /* | |
815 | * Returns the first available (non-opened) console. | |
816 | */ | |
817 | case VT_OPENQRY: | |
818 | for (i = 0; i < MAX_NR_CONSOLES; ++i) | |
819 | if (! VT_IS_IN_USE(i)) | |
820 | break; | |
821 | ucval = i < MAX_NR_CONSOLES ? (i+1) : -1; | |
822 | goto setint; | |
823 | ||
824 | /* | |
825 | * ioctl(fd, VT_ACTIVATE, num) will cause us to switch to vt # num, | |
826 | * with num >= 1 (switches to vt 0, our console, are not allowed, just | |
827 | * to preserve sanity). | |
828 | */ | |
829 | case VT_ACTIVATE: | |
830 | if (!perm) | |
9cc3c22b | 831 | goto eperm; |
1da177e4 | 832 | if (arg == 0 || arg > MAX_NR_CONSOLES) |
9cc3c22b AC |
833 | ret = -ENXIO; |
834 | else { | |
835 | arg--; | |
836 | acquire_console_sem(); | |
837 | ret = vc_allocate(arg); | |
838 | release_console_sem(); | |
839 | if (ret) | |
840 | break; | |
841 | set_console(arg); | |
842 | } | |
843 | break; | |
1da177e4 LT |
844 | |
845 | /* | |
846 | * wait until the specified VT has been activated | |
847 | */ | |
848 | case VT_WAITACTIVE: | |
849 | if (!perm) | |
9cc3c22b | 850 | goto eperm; |
1da177e4 | 851 | if (arg == 0 || arg > MAX_NR_CONSOLES) |
9cc3c22b AC |
852 | ret = -ENXIO; |
853 | else | |
854 | ret = vt_waitactive(arg - 1); | |
855 | break; | |
1da177e4 LT |
856 | |
857 | /* | |
858 | * If a vt is under process control, the kernel will not switch to it | |
859 | * immediately, but postpone the operation until the process calls this | |
860 | * ioctl, allowing the switch to complete. | |
861 | * | |
862 | * According to the X sources this is the behavior: | |
863 | * 0: pending switch-from not OK | |
864 | * 1: pending switch-from OK | |
865 | * 2: completed switch-to OK | |
866 | */ | |
867 | case VT_RELDISP: | |
868 | if (!perm) | |
9cc3c22b | 869 | goto eperm; |
1da177e4 | 870 | |
9cc3c22b AC |
871 | if (vc->vt_mode.mode != VT_PROCESS) { |
872 | ret = -EINVAL; | |
873 | break; | |
874 | } | |
1da177e4 LT |
875 | /* |
876 | * Switching-from response | |
877 | */ | |
8792f961 | 878 | acquire_console_sem(); |
1da177e4 LT |
879 | if (vc->vt_newvt >= 0) { |
880 | if (arg == 0) | |
881 | /* | |
882 | * Switch disallowed, so forget we were trying | |
883 | * to do it. | |
884 | */ | |
885 | vc->vt_newvt = -1; | |
886 | ||
887 | else { | |
888 | /* | |
889 | * The current vt has been released, so | |
890 | * complete the switch. | |
891 | */ | |
892 | int newvt; | |
1da177e4 LT |
893 | newvt = vc->vt_newvt; |
894 | vc->vt_newvt = -1; | |
9cc3c22b AC |
895 | ret = vc_allocate(newvt); |
896 | if (ret) { | |
1da177e4 | 897 | release_console_sem(); |
9cc3c22b | 898 | break; |
1da177e4 LT |
899 | } |
900 | /* | |
901 | * When we actually do the console switch, | |
902 | * make sure we are atomic with respect to | |
903 | * other console switches.. | |
904 | */ | |
905 | complete_change_console(vc_cons[newvt].d); | |
1da177e4 | 906 | } |
9cc3c22b AC |
907 | } else { |
908 | /* | |
909 | * Switched-to response | |
910 | */ | |
1da177e4 LT |
911 | /* |
912 | * If it's just an ACK, ignore it | |
913 | */ | |
9cc3c22b AC |
914 | if (arg != VT_ACKACQ) |
915 | ret = -EINVAL; | |
1da177e4 | 916 | } |
8792f961 | 917 | release_console_sem(); |
9cc3c22b | 918 | break; |
1da177e4 LT |
919 | |
920 | /* | |
921 | * Disallocate memory associated to VT (but leave VT1) | |
922 | */ | |
923 | case VT_DISALLOCATE: | |
9cc3c22b AC |
924 | if (arg > MAX_NR_CONSOLES) { |
925 | ret = -ENXIO; | |
926 | break; | |
927 | } | |
1da177e4 | 928 | if (arg == 0) { |
ca9bda00 | 929 | /* deallocate all unused consoles, but leave 0 */ |
1da177e4 LT |
930 | acquire_console_sem(); |
931 | for (i=1; i<MAX_NR_CONSOLES; i++) | |
932 | if (! VT_BUSY(i)) | |
ca9bda00 | 933 | vc_deallocate(i); |
1da177e4 LT |
934 | release_console_sem(); |
935 | } else { | |
ca9bda00 | 936 | /* deallocate a single console, if possible */ |
1da177e4 LT |
937 | arg--; |
938 | if (VT_BUSY(arg)) | |
9cc3c22b AC |
939 | ret = -EBUSY; |
940 | else if (arg) { /* leave 0 */ | |
1da177e4 | 941 | acquire_console_sem(); |
ca9bda00 | 942 | vc_deallocate(arg); |
1da177e4 LT |
943 | release_console_sem(); |
944 | } | |
945 | } | |
9cc3c22b | 946 | break; |
1da177e4 LT |
947 | |
948 | case VT_RESIZE: | |
949 | { | |
950 | struct vt_sizes __user *vtsizes = up; | |
e400b6ec AD |
951 | struct vc_data *vc; |
952 | ||
1da177e4 LT |
953 | ushort ll,cc; |
954 | if (!perm) | |
9cc3c22b | 955 | goto eperm; |
1da177e4 LT |
956 | if (get_user(ll, &vtsizes->v_rows) || |
957 | get_user(cc, &vtsizes->v_cols)) | |
9cc3c22b AC |
958 | ret = -EFAULT; |
959 | else { | |
8c9a9dd0 | 960 | acquire_console_sem(); |
9cc3c22b AC |
961 | for (i = 0; i < MAX_NR_CONSOLES; i++) { |
962 | vc = vc_cons[i].d; | |
e400b6ec | 963 | |
9cc3c22b AC |
964 | if (vc) { |
965 | vc->vc_resize_user = 1; | |
8c9a9dd0 | 966 | vc_resize(vc_cons[i].d, cc, ll); |
9cc3c22b | 967 | } |
e400b6ec | 968 | } |
8c9a9dd0 | 969 | release_console_sem(); |
e400b6ec | 970 | } |
9cc3c22b | 971 | break; |
1da177e4 LT |
972 | } |
973 | ||
974 | case VT_RESIZEX: | |
975 | { | |
976 | struct vt_consize __user *vtconsize = up; | |
977 | ushort ll,cc,vlin,clin,vcol,ccol; | |
978 | if (!perm) | |
9cc3c22b | 979 | goto eperm; |
1da177e4 | 980 | if (!access_ok(VERIFY_READ, vtconsize, |
9cc3c22b AC |
981 | sizeof(struct vt_consize))) { |
982 | ret = -EFAULT; | |
983 | break; | |
984 | } | |
985 | /* FIXME: Should check the copies properly */ | |
1da177e4 LT |
986 | __get_user(ll, &vtconsize->v_rows); |
987 | __get_user(cc, &vtconsize->v_cols); | |
988 | __get_user(vlin, &vtconsize->v_vlin); | |
989 | __get_user(clin, &vtconsize->v_clin); | |
990 | __get_user(vcol, &vtconsize->v_vcol); | |
991 | __get_user(ccol, &vtconsize->v_ccol); | |
992 | vlin = vlin ? vlin : vc->vc_scan_lines; | |
993 | if (clin) { | |
994 | if (ll) { | |
9cc3c22b AC |
995 | if (ll != vlin/clin) { |
996 | /* Parameters don't add up */ | |
997 | ret = -EINVAL; | |
998 | break; | |
999 | } | |
1da177e4 LT |
1000 | } else |
1001 | ll = vlin/clin; | |
1002 | } | |
1003 | if (vcol && ccol) { | |
1004 | if (cc) { | |
9cc3c22b AC |
1005 | if (cc != vcol/ccol) { |
1006 | ret = -EINVAL; | |
1007 | break; | |
1008 | } | |
1da177e4 LT |
1009 | } else |
1010 | cc = vcol/ccol; | |
1011 | } | |
1012 | ||
9cc3c22b AC |
1013 | if (clin > 32) { |
1014 | ret = -EINVAL; | |
1015 | break; | |
1016 | } | |
1da177e4 LT |
1017 | |
1018 | for (i = 0; i < MAX_NR_CONSOLES; i++) { | |
1019 | if (!vc_cons[i].d) | |
1020 | continue; | |
1021 | acquire_console_sem(); | |
1022 | if (vlin) | |
1023 | vc_cons[i].d->vc_scan_lines = vlin; | |
1024 | if (clin) | |
1025 | vc_cons[i].d->vc_font.height = clin; | |
e400b6ec | 1026 | vc_cons[i].d->vc_resize_user = 1; |
1da177e4 LT |
1027 | vc_resize(vc_cons[i].d, cc, ll); |
1028 | release_console_sem(); | |
1029 | } | |
9cc3c22b | 1030 | break; |
1da177e4 LT |
1031 | } |
1032 | ||
1033 | case PIO_FONT: { | |
1034 | if (!perm) | |
9cc3c22b | 1035 | goto eperm; |
1da177e4 LT |
1036 | op.op = KD_FONT_OP_SET; |
1037 | op.flags = KD_FONT_FLAG_OLD | KD_FONT_FLAG_DONT_RECALC; /* Compatibility */ | |
1038 | op.width = 8; | |
1039 | op.height = 0; | |
1040 | op.charcount = 256; | |
1041 | op.data = up; | |
9cc3c22b AC |
1042 | ret = con_font_op(vc_cons[fg_console].d, &op); |
1043 | break; | |
1da177e4 LT |
1044 | } |
1045 | ||
1046 | case GIO_FONT: { | |
1047 | op.op = KD_FONT_OP_GET; | |
1048 | op.flags = KD_FONT_FLAG_OLD; | |
1049 | op.width = 8; | |
1050 | op.height = 32; | |
1051 | op.charcount = 256; | |
1052 | op.data = up; | |
9cc3c22b AC |
1053 | ret = con_font_op(vc_cons[fg_console].d, &op); |
1054 | break; | |
1da177e4 LT |
1055 | } |
1056 | ||
1057 | case PIO_CMAP: | |
1058 | if (!perm) | |
9cc3c22b AC |
1059 | ret = -EPERM; |
1060 | else | |
1061 | ret = con_set_cmap(up); | |
1062 | break; | |
1da177e4 LT |
1063 | |
1064 | case GIO_CMAP: | |
9cc3c22b AC |
1065 | ret = con_get_cmap(up); |
1066 | break; | |
1da177e4 LT |
1067 | |
1068 | case PIO_FONTX: | |
1069 | case GIO_FONTX: | |
9cc3c22b AC |
1070 | ret = do_fontx_ioctl(cmd, up, perm, &op); |
1071 | break; | |
1da177e4 LT |
1072 | |
1073 | case PIO_FONTRESET: | |
1074 | { | |
1075 | if (!perm) | |
9cc3c22b | 1076 | goto eperm; |
1da177e4 LT |
1077 | |
1078 | #ifdef BROKEN_GRAPHICS_PROGRAMS | |
1079 | /* With BROKEN_GRAPHICS_PROGRAMS defined, the default | |
1080 | font is not saved. */ | |
9cc3c22b AC |
1081 | ret = -ENOSYS; |
1082 | break; | |
1da177e4 LT |
1083 | #else |
1084 | { | |
1085 | op.op = KD_FONT_OP_SET_DEFAULT; | |
1086 | op.data = NULL; | |
9cc3c22b AC |
1087 | ret = con_font_op(vc_cons[fg_console].d, &op); |
1088 | if (ret) | |
1089 | break; | |
1da177e4 | 1090 | con_set_default_unimap(vc_cons[fg_console].d); |
9cc3c22b | 1091 | break; |
1da177e4 LT |
1092 | } |
1093 | #endif | |
1094 | } | |
1095 | ||
1096 | case KDFONTOP: { | |
9cc3c22b AC |
1097 | if (copy_from_user(&op, up, sizeof(op))) { |
1098 | ret = -EFAULT; | |
1099 | break; | |
1100 | } | |
1da177e4 | 1101 | if (!perm && op.op != KD_FONT_OP_GET) |
9cc3c22b AC |
1102 | goto eperm; |
1103 | ret = con_font_op(vc, &op); | |
1104 | if (ret) | |
1105 | break; | |
1da177e4 | 1106 | if (copy_to_user(up, &op, sizeof(op))) |
9cc3c22b AC |
1107 | ret = -EFAULT; |
1108 | break; | |
1da177e4 LT |
1109 | } |
1110 | ||
1111 | case PIO_SCRNMAP: | |
1112 | if (!perm) | |
9cc3c22b AC |
1113 | ret = -EPERM; |
1114 | else | |
1115 | ret = con_set_trans_old(up); | |
1116 | break; | |
1da177e4 LT |
1117 | |
1118 | case GIO_SCRNMAP: | |
9cc3c22b AC |
1119 | ret = con_get_trans_old(up); |
1120 | break; | |
1da177e4 LT |
1121 | |
1122 | case PIO_UNISCRNMAP: | |
1123 | if (!perm) | |
9cc3c22b AC |
1124 | ret = -EPERM; |
1125 | else | |
1126 | ret = con_set_trans_new(up); | |
1127 | break; | |
1da177e4 LT |
1128 | |
1129 | case GIO_UNISCRNMAP: | |
9cc3c22b AC |
1130 | ret = con_get_trans_new(up); |
1131 | break; | |
1da177e4 LT |
1132 | |
1133 | case PIO_UNIMAPCLR: | |
1134 | { struct unimapinit ui; | |
1135 | if (!perm) | |
9cc3c22b AC |
1136 | goto eperm; |
1137 | ret = copy_from_user(&ui, up, sizeof(struct unimapinit)); | |
1138 | if (!ret) | |
1139 | con_clear_unimap(vc, &ui); | |
1140 | break; | |
1da177e4 LT |
1141 | } |
1142 | ||
1143 | case PIO_UNIMAP: | |
1144 | case GIO_UNIMAP: | |
9cc3c22b AC |
1145 | ret = do_unimap_ioctl(cmd, up, perm, vc); |
1146 | break; | |
1da177e4 LT |
1147 | |
1148 | case VT_LOCKSWITCH: | |
1149 | if (!capable(CAP_SYS_TTY_CONFIG)) | |
9cc3c22b | 1150 | goto eperm; |
1da177e4 | 1151 | vt_dont_switch = 1; |
9cc3c22b | 1152 | break; |
1da177e4 LT |
1153 | case VT_UNLOCKSWITCH: |
1154 | if (!capable(CAP_SYS_TTY_CONFIG)) | |
9cc3c22b | 1155 | goto eperm; |
1da177e4 | 1156 | vt_dont_switch = 0; |
9cc3c22b | 1157 | break; |
533475d3 | 1158 | case VT_GETHIFONTMASK: |
9cc3c22b AC |
1159 | ret = put_user(vc->vc_hi_font_mask, |
1160 | (unsigned short __user *)arg); | |
1161 | break; | |
1da177e4 | 1162 | default: |
9cc3c22b | 1163 | ret = -ENOIOCTLCMD; |
1da177e4 | 1164 | } |
9cc3c22b AC |
1165 | out: |
1166 | unlock_kernel(); | |
1167 | return ret; | |
1168 | eperm: | |
1169 | ret = -EPERM; | |
1170 | goto out; | |
1da177e4 LT |
1171 | } |
1172 | ||
1173 | /* | |
1174 | * Sometimes we want to wait until a particular VT has been activated. We | |
1175 | * do it in a very simple manner. Everybody waits on a single queue and | |
1176 | * get woken up at once. Those that are satisfied go on with their business, | |
1177 | * while those not ready go back to sleep. Seems overkill to add a wait | |
1178 | * to each vt just for this - usually this does nothing! | |
1179 | */ | |
1180 | static DECLARE_WAIT_QUEUE_HEAD(vt_activate_queue); | |
1181 | ||
1182 | /* | |
1183 | * Sleeps until a vt is activated, or the task is interrupted. Returns | |
70cb9793 | 1184 | * 0 if activation, -EINTR if interrupted by a signal handler. |
1da177e4 LT |
1185 | */ |
1186 | int vt_waitactive(int vt) | |
1187 | { | |
1188 | int retval; | |
1189 | DECLARE_WAITQUEUE(wait, current); | |
1190 | ||
1191 | add_wait_queue(&vt_activate_queue, &wait); | |
1192 | for (;;) { | |
1da177e4 | 1193 | retval = 0; |
f991519c MJ |
1194 | |
1195 | /* | |
1196 | * Synchronize with redraw_screen(). By acquiring the console | |
1197 | * semaphore we make sure that the console switch is completed | |
1198 | * before we return. If we didn't wait for the semaphore, we | |
1199 | * could return at a point where fg_console has already been | |
1200 | * updated, but the console switch hasn't been completed. | |
1201 | */ | |
1202 | acquire_console_sem(); | |
1203 | set_current_state(TASK_INTERRUPTIBLE); | |
1204 | if (vt == fg_console) { | |
1205 | release_console_sem(); | |
1da177e4 | 1206 | break; |
f991519c MJ |
1207 | } |
1208 | release_console_sem(); | |
70cb9793 | 1209 | retval = -ERESTARTNOHAND; |
1da177e4 LT |
1210 | if (signal_pending(current)) |
1211 | break; | |
1212 | schedule(); | |
1213 | } | |
1214 | remove_wait_queue(&vt_activate_queue, &wait); | |
cc0a8fbb | 1215 | __set_current_state(TASK_RUNNING); |
1da177e4 LT |
1216 | return retval; |
1217 | } | |
1218 | ||
1219 | #define vt_wake_waitactive() wake_up(&vt_activate_queue) | |
1220 | ||
1221 | void reset_vc(struct vc_data *vc) | |
1222 | { | |
1223 | vc->vc_mode = KD_TEXT; | |
2e8ecb9d | 1224 | kbd_table[vc->vc_num].kbdmode = default_utf8 ? VC_UNICODE : VC_XLATE; |
1da177e4 LT |
1225 | vc->vt_mode.mode = VT_AUTO; |
1226 | vc->vt_mode.waitv = 0; | |
1227 | vc->vt_mode.relsig = 0; | |
1228 | vc->vt_mode.acqsig = 0; | |
1229 | vc->vt_mode.frsig = 0; | |
8b6312f4 EB |
1230 | put_pid(vc->vt_pid); |
1231 | vc->vt_pid = NULL; | |
1da177e4 LT |
1232 | vc->vt_newvt = -1; |
1233 | if (!in_interrupt()) /* Via keyboard.c:SAK() - akpm */ | |
1234 | reset_palette(vc); | |
1235 | } | |
1236 | ||
8b6312f4 EB |
1237 | void vc_SAK(struct work_struct *work) |
1238 | { | |
1239 | struct vc *vc_con = | |
1240 | container_of(work, struct vc, SAK_work); | |
1241 | struct vc_data *vc; | |
1242 | struct tty_struct *tty; | |
1243 | ||
1244 | acquire_console_sem(); | |
1245 | vc = vc_con->d; | |
1246 | if (vc) { | |
1247 | tty = vc->vc_tty; | |
1248 | /* | |
1249 | * SAK should also work in all raw modes and reset | |
1250 | * them properly. | |
1251 | */ | |
1252 | if (tty) | |
1253 | __do_SAK(tty); | |
1254 | reset_vc(vc); | |
1255 | } | |
1256 | release_console_sem(); | |
1257 | } | |
1258 | ||
1da177e4 LT |
1259 | /* |
1260 | * Performs the back end of a vt switch | |
1261 | */ | |
1262 | static void complete_change_console(struct vc_data *vc) | |
1263 | { | |
1264 | unsigned char old_vc_mode; | |
1265 | ||
1266 | last_console = fg_console; | |
1267 | ||
1268 | /* | |
1269 | * If we're switching, we could be going from KD_GRAPHICS to | |
1270 | * KD_TEXT mode or vice versa, which means we need to blank or | |
1271 | * unblank the screen later. | |
1272 | */ | |
1273 | old_vc_mode = vc_cons[fg_console].d->vc_mode; | |
1274 | switch_screen(vc); | |
1275 | ||
1276 | /* | |
3dfcaf16 | 1277 | * This can't appear below a successful kill_pid(). If it did, |
1da177e4 LT |
1278 | * then the *blank_screen operation could occur while X, having |
1279 | * received acqsig, is waking up on another processor. This | |
1280 | * condition can lead to overlapping accesses to the VGA range | |
1281 | * and the framebuffer (causing system lockups). | |
1282 | * | |
1283 | * To account for this we duplicate this code below only if the | |
1284 | * controlling process is gone and we've called reset_vc. | |
1285 | */ | |
1286 | if (old_vc_mode != vc->vc_mode) { | |
1287 | if (vc->vc_mode == KD_TEXT) | |
1288 | do_unblank_screen(1); | |
1289 | else | |
1290 | do_blank_screen(1); | |
1291 | } | |
1292 | ||
1293 | /* | |
1294 | * If this new console is under process control, send it a signal | |
1295 | * telling it that it has acquired. Also check if it has died and | |
1296 | * clean up (similar to logic employed in change_console()) | |
1297 | */ | |
1298 | if (vc->vt_mode.mode == VT_PROCESS) { | |
1299 | /* | |
3dfcaf16 | 1300 | * Send the signal as privileged - kill_pid() will |
1da177e4 LT |
1301 | * tell us if the process has gone or something else |
1302 | * is awry | |
1303 | */ | |
bde0d2c9 | 1304 | if (kill_pid(vc->vt_pid, vc->vt_mode.acqsig, 1) != 0) { |
1da177e4 LT |
1305 | /* |
1306 | * The controlling process has died, so we revert back to | |
1307 | * normal operation. In this case, we'll also change back | |
1308 | * to KD_TEXT mode. I'm not sure if this is strictly correct | |
1309 | * but it saves the agony when the X server dies and the screen | |
1310 | * remains blanked due to KD_GRAPHICS! It would be nice to do | |
1311 | * this outside of VT_PROCESS but there is no single process | |
1312 | * to account for and tracking tty count may be undesirable. | |
1313 | */ | |
1314 | reset_vc(vc); | |
1315 | ||
1316 | if (old_vc_mode != vc->vc_mode) { | |
1317 | if (vc->vc_mode == KD_TEXT) | |
1318 | do_unblank_screen(1); | |
1319 | else | |
1320 | do_blank_screen(1); | |
1321 | } | |
1322 | } | |
1323 | } | |
1324 | ||
1325 | /* | |
1326 | * Wake anyone waiting for their VT to activate | |
1327 | */ | |
1328 | vt_wake_waitactive(); | |
1329 | return; | |
1330 | } | |
1331 | ||
1332 | /* | |
1333 | * Performs the front-end of a vt switch | |
1334 | */ | |
1335 | void change_console(struct vc_data *new_vc) | |
1336 | { | |
1337 | struct vc_data *vc; | |
1338 | ||
1339 | if (!new_vc || new_vc->vc_num == fg_console || vt_dont_switch) | |
1340 | return; | |
1341 | ||
1342 | /* | |
1343 | * If this vt is in process mode, then we need to handshake with | |
1344 | * that process before switching. Essentially, we store where that | |
1345 | * vt wants to switch to and wait for it to tell us when it's done | |
1346 | * (via VT_RELDISP ioctl). | |
1347 | * | |
1348 | * We also check to see if the controlling process still exists. | |
1349 | * If it doesn't, we reset this vt to auto mode and continue. | |
1350 | * This is a cheap way to track process control. The worst thing | |
1351 | * that can happen is: we send a signal to a process, it dies, and | |
1352 | * the switch gets "lost" waiting for a response; hopefully, the | |
1353 | * user will try again, we'll detect the process is gone (unless | |
1354 | * the user waits just the right amount of time :-) and revert the | |
1355 | * vt to auto control. | |
1356 | */ | |
1357 | vc = vc_cons[fg_console].d; | |
1358 | if (vc->vt_mode.mode == VT_PROCESS) { | |
1359 | /* | |
3dfcaf16 | 1360 | * Send the signal as privileged - kill_pid() will |
1da177e4 | 1361 | * tell us if the process has gone or something else |
a64314e6 JL |
1362 | * is awry. |
1363 | * | |
1364 | * We need to set vt_newvt *before* sending the signal or we | |
1365 | * have a race. | |
1da177e4 | 1366 | */ |
a64314e6 | 1367 | vc->vt_newvt = new_vc->vc_num; |
bde0d2c9 | 1368 | if (kill_pid(vc->vt_pid, vc->vt_mode.relsig, 1) == 0) { |
1da177e4 LT |
1369 | /* |
1370 | * It worked. Mark the vt to switch to and | |
1371 | * return. The process needs to send us a | |
1372 | * VT_RELDISP ioctl to complete the switch. | |
1373 | */ | |
1da177e4 LT |
1374 | return; |
1375 | } | |
1376 | ||
1377 | /* | |
1378 | * The controlling process has died, so we revert back to | |
1379 | * normal operation. In this case, we'll also change back | |
1380 | * to KD_TEXT mode. I'm not sure if this is strictly correct | |
1381 | * but it saves the agony when the X server dies and the screen | |
1382 | * remains blanked due to KD_GRAPHICS! It would be nice to do | |
1383 | * this outside of VT_PROCESS but there is no single process | |
1384 | * to account for and tracking tty count may be undesirable. | |
1385 | */ | |
1386 | reset_vc(vc); | |
1387 | ||
1388 | /* | |
1389 | * Fall through to normal (VT_AUTO) handling of the switch... | |
1390 | */ | |
1391 | } | |
1392 | ||
1393 | /* | |
1394 | * Ignore all switches in KD_GRAPHICS+VT_AUTO mode | |
1395 | */ | |
1396 | if (vc->vc_mode == KD_GRAPHICS) | |
1397 | return; | |
1398 | ||
1399 | complete_change_console(new_vc); | |
1400 | } |