1 /*
2 * Copyright (c) 2015 Etienne Gemsa <etienne.gemsa@lse.epita.fr>
3 * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include "defs.h"
30
31 #include <linux/ioctl.h>
32
33 #ifdef HAVE_LINUX_INPUT_H
34 #include <linux/input.h>
35 #include "xlat/evdev_abs.h"
36 #include "xlat/evdev_autorepeat.h"
37 #include "xlat/evdev_ff_status.h"
38 #include "xlat/evdev_ff_types.h"
39 #include "xlat/evdev_keycode.h"
40 #include "xlat/evdev_leds.h"
41 #include "xlat/evdev_misc.h"
42 #include "xlat/evdev_mtslots.h"
43 #include "xlat/evdev_prop.h"
44 #include "xlat/evdev_relative_axes.h"
45 #include "xlat/evdev_snd.h"
46 #include "xlat/evdev_switch.h"
47 #include "xlat/evdev_sync.h"
48
49 #ifndef SYN_MAX
50 # define SYN_MAX 0xf
51 #endif
52
53 static void
decode_envelope(struct ff_envelope * envelope)54 decode_envelope(struct ff_envelope *envelope)
55 {
56 tprintf(", envelope={attack_length=%" PRIu16 ", attack_level=%" PRIu16
57 ", fade_length=%" PRIu16 ", fade_level=%" PRIx32 "}",
58 envelope->attack_length,
59 envelope->attack_level,
60 envelope->fade_length,
61 envelope->fade_level);
62 }
63
64 static int
ff_effect_ioctl(struct tcb * tcp,long arg)65 ff_effect_ioctl(struct tcb *tcp, long arg)
66 {
67 struct ff_effect ffe;
68
69 if (!verbose(tcp) || umove(tcp, arg, &ffe) < 0)
70 return 0;
71
72 tprints(", {type=");
73 printxval(evdev_ff_types, ffe.type, "FF_???");
74 tprintf(", id=%" PRIu16 ", direction=%" PRIu16,
75 ffe.id, ffe.direction);
76
77 if (!abbrev(tcp)) {
78 tprintf(", trigger={button=%" PRIu16 ", interval=%" PRIu16 "}",
79 ffe.trigger.button, ffe.trigger.interval);
80 tprintf(", replay={lenght=%" PRIu16 ", delay=%" PRIu16 "}",
81 ffe.replay.length, ffe.replay.delay);
82 switch (ffe.type) {
83 case FF_CONSTANT:
84 tprintf(", constant_ef={%" PRIi16,
85 ffe.u.constant.level);
86 decode_envelope(&ffe.u.constant.envelope);
87 tprints("}");
88 return 1;
89 case FF_RAMP:
90 tprintf(", ramp={start_level=%" PRIi16
91 ", end_level=%" PRIi16,
92 ffe.u.ramp.start_level,
93 ffe.u.ramp.end_level);
94 decode_envelope(&ffe.u.ramp.envelope);
95 tprints("}");
96 return 1;
97 case FF_PERIODIC:
98 tprintf(", periodic_ef={waveform=%" PRIu16
99 ", period=%" PRIu16
100 ", magnitude=%" PRIi16
101 ", offset=%" PRIi16
102 ", phase=%" PRIu16,
103 ffe.u.periodic.waveform,
104 ffe.u.periodic.period,
105 ffe.u.periodic.magnitude,
106 ffe.u.periodic.offset,
107 ffe.u.periodic.phase);
108 decode_envelope(&ffe.u.periodic.envelope);
109 tprintf(", custom_len=%" PRIu32
110 ", *custom_data=%#lx}",
111 ffe.u.periodic.custom_len,
112 (unsigned long)ffe.u.periodic.custom_data);
113 return 1;
114 case FF_RUMBLE:
115 tprintf(", rumble={strong_magnitude=%" PRIu16
116 ", weak_magnitude=%" PRIu16 "}",
117 ffe.u.rumble.strong_magnitude,
118 ffe.u.rumble.weak_magnitude);
119 return 1;
120 case FF_SPRING:
121 case FF_FRICTION:
122 case FF_DAMPER:
123 case FF_INERTIA:
124 case FF_CUSTOM:
125 break;
126 default :
127 break;
128 }
129 }
130
131 tprints(", ...}");
132 return 1;
133 }
134
135 static int
abs_ioctl(struct tcb * tcp,long arg)136 abs_ioctl(struct tcb *tcp, long arg)
137 {
138 struct input_absinfo absinfo;
139
140 if (!verbose(tcp) || umove(tcp, arg, &absinfo) < 0)
141 return 0;
142
143 tprintf(", {value=%" PRIu32 ", minimum=%" PRIu32,
144 absinfo.value, absinfo.minimum);
145 if (!abbrev(tcp)) {
146 tprintf(", maximum=%" PRIu32 ", fuzz=%" PRIu32,
147 absinfo.maximum, absinfo.fuzz);
148 tprintf(", flat=%" PRIu32, absinfo.flat);
149 #ifdef HAVE_STRUCT_INPUT_ABSINFO_RESOLUTION
150 tprintf(", resolution=%" PRIu32, absinfo.resolution);
151 #endif
152 tprints("}");
153 } else {
154 tprints(", ...}");
155 }
156 return 1;
157 }
158
159 static int
keycode_ioctl(struct tcb * tcp,long arg)160 keycode_ioctl(struct tcb *tcp, long arg)
161 {
162 unsigned int keycode[2];
163
164 if (!arg) {
165 tprints(", NULL");
166 return 1;
167 }
168
169 if (!verbose(tcp) || umove(tcp, arg, &keycode) < 0)
170 return 0;
171
172 tprintf(", [%u, ", keycode[0]);
173 printxval(evdev_keycode, keycode[1], "KEY_???");
174 tprints("]");
175 return 1;
176 }
177
178 #ifdef EVIOCGKEYCODE_V2
179 static int
keycode_V2_ioctl(struct tcb * tcp,long arg)180 keycode_V2_ioctl(struct tcb *tcp, long arg)
181 {
182 struct input_keymap_entry ike;
183
184 if (!arg) {
185 tprints(", NULL");
186 return 1;
187 }
188
189 if (!verbose(tcp) || umove(tcp, arg, &ike) < 0)
190 return 0;
191
192 tprintf(", {flags=%" PRIu8 ", len=%" PRIu8, ike.flags, ike.len);
193 if (!abbrev(tcp)) {
194 unsigned int i;
195
196 tprintf(", index=%" PRIu16 ", keycode=", ike.index);
197 printxval(evdev_keycode, ike.keycode, "KEY_???");
198 tprints(", scancode=[");
199 for (i = 0; i < ARRAY_SIZE(ike.scancode); i++) {
200 if (i > 0)
201 tprints(", ");
202 tprintf("%" PRIx8, ike.scancode[i]);
203 }
204 tprints("]}");
205 } else {
206 tprints(", ...}");
207 }
208 return 1;
209 }
210 #endif /* EVIOCGKEYCODE_V2 */
211
212 static int
getid_ioctl(struct tcb * tcp,long arg)213 getid_ioctl(struct tcb *tcp, long arg)
214 {
215 struct input_id id;
216
217 if (!verbose(tcp) || umove(tcp, arg, &id) < 0)
218 return 0;
219
220 tprintf(", {ID_BUS=%" PRIu16 ", ID_VENDOR=%" PRIu16,
221 id.bustype, id.vendor);
222 if (!abbrev(tcp)) {
223 tprintf(", ID_PRODUCT=%" PRIu16 ", ID_VERSION=%" PRIu16 "}",
224 id.product, id.version);
225 } else {
226 tprints(", ...}");
227 }
228 return 1;
229 }
230
231 static int
decode_bitset(struct tcb * tcp,long arg,const struct xlat decode_nr[],const unsigned int max_nr,const char * dflt)232 decode_bitset(struct tcb *tcp, long arg, const struct xlat decode_nr[],
233 const unsigned int max_nr, const char *dflt)
234 {
235 if (!verbose(tcp))
236 return 0;
237
238 unsigned int size;
239 if ((unsigned long) tcp->u_rval > max_nr)
240 size = max_nr;
241 else
242 size = tcp->u_rval;
243 char decoded_arg[size];
244
245 if (umoven(tcp, arg, size, decoded_arg) < 0)
246 return 0;
247
248 tprints(", [");
249
250 int bit_displayed = 0;
251 int i = next_set_bit(decoded_arg, 0, size);
252 if (i < 0) {
253 tprints(" 0 ");
254 } else {
255 printxval(decode_nr, i, dflt);
256
257 while ((i = next_set_bit(decoded_arg, i + 1, size)) > 0) {
258 if (abbrev(tcp) && bit_displayed >= 3) {
259 tprints(", ...");
260 break;
261 }
262 tprints(", ");
263 printxval(decode_nr, i, dflt);
264 bit_displayed++;
265 }
266 }
267
268 tprints("]");
269
270 return 1;
271 }
272
273 #ifdef EVIOCGMTSLOTS
274 static int
mtslots_ioctl(struct tcb * tcp,const unsigned int code,long arg)275 mtslots_ioctl(struct tcb *tcp, const unsigned int code, long arg)
276 {
277 const size_t size = _IOC_SIZE(code) / sizeof(int32_t);
278 if (!size)
279 return 0;
280
281 int32_t buffer[size];
282
283 if (!verbose(tcp) || umove(tcp, arg, &buffer) < 0)
284 return 0;
285
286 tprints(", {code=");
287 printxval(evdev_mtslots, buffer[0], "ABS_MT_???");
288
289 unsigned int i;
290 tprints(", values=[");
291
292 for (i = 1; i < ARRAY_SIZE(buffer); i++)
293 tprintf("%s%d", i > 1 ? ", " : "", buffer[i]);
294
295 tprints("]}");
296 return 1;
297 }
298 #endif /* EVIOCGMTSLOTS */
299
300 #ifdef EVIOCGREP
301 static int
repeat_ioctl(struct tcb * tcp,long arg)302 repeat_ioctl(struct tcb *tcp, long arg)
303 {
304 unsigned int val[2];
305
306 if (!verbose(tcp) || umove(tcp, arg, &val) < 0)
307 return 0;
308
309 tprintf(", [%" PRIu32 " %" PRIu32 "]", val[0], val[1]);
310 return 1;
311 }
312 #endif /* EVIOCGREP */
313
314 static int
evdev_read_ioctl(struct tcb * tcp,const unsigned int code,long arg)315 evdev_read_ioctl(struct tcb *tcp, const unsigned int code, long arg)
316 {
317 if (entering(tcp))
318 return 1;
319
320 if (syserror(tcp))
321 return 0;
322
323 if ((_IOC_NR(code) & ~EV_MAX) == _IOC_NR(EVIOCGBIT(0, 0))) {
324 switch (_IOC_NR(code) - 0x20) {
325 case EV_SYN:
326 return decode_bitset(tcp, arg, evdev_sync,
327 SYN_MAX, "SYN_???");
328 case EV_KEY:
329 return decode_bitset(tcp, arg, evdev_keycode,
330 KEY_MAX, "KEY_???");
331 case EV_REL:
332 return decode_bitset(tcp, arg, evdev_relative_axes,
333 REL_MAX, "REL_???");
334 case EV_ABS:
335 return decode_bitset(tcp, arg,
336 evdev_abs, ABS_MAX, "ABS_???");
337 case EV_MSC:
338 return decode_bitset(tcp, arg,
339 evdev_misc, MSC_MAX, "MSC_???");
340 #ifdef EV_SW
341 case EV_SW:
342 return decode_bitset(tcp, arg,
343 evdev_switch, SW_MAX, "SW_???");
344 #endif
345 case EV_LED:
346 return decode_bitset(tcp, arg,
347 evdev_leds, LED_MAX, "LED_???");
348 case EV_SND:
349 return decode_bitset(tcp, arg,
350 evdev_snd, SND_MAX, "SND_???");
351 case EV_REP:
352 return decode_bitset(tcp, arg, evdev_autorepeat,
353 REP_MAX, "REP_???");
354 case EV_FF:
355 return decode_bitset(tcp, arg, evdev_ff_types,
356 FF_MAX, "FF_???");
357 case EV_PWR:
358 printnum_int(tcp, arg, "%d");
359 return 1;
360 case EV_FF_STATUS:
361 return decode_bitset(tcp, arg, evdev_ff_status,
362 FF_STATUS_MAX, "FF_STATUS_???");
363 default:
364 return 0;
365 }
366 }
367
368 if ((_IOC_NR(code) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0)))
369 return abs_ioctl(tcp, arg);
370
371 switch (code) {
372 case EVIOCGVERSION:
373 tprints(", ");
374 printnum_int(tcp, arg, "%" PRIx32);
375 return 1;
376 case EVIOCGEFFECTS:
377 tprints(", ");
378 printnum_int(tcp, arg, "%" PRIu32);
379 return 1;
380 case EVIOCGID:
381 return getid_ioctl(tcp, arg);
382 #ifdef EVIOCGREP
383 case EVIOCGREP:
384 return repeat_ioctl(tcp, arg);;
385 #endif
386 case EVIOCGKEYCODE:
387 return keycode_ioctl(tcp, arg);
388 #ifdef EVIOCGKEYCODE_V2
389 case EVIOCGKEYCODE_V2:
390 return keycode_V2_ioctl(tcp, arg);
391 #endif
392 }
393
394 switch (_IOC_NR(code)) {
395 #ifdef EVIOCGMTSLOTS
396 case _IOC_NR(EVIOCGMTSLOTS(0)):
397 return mtslots_ioctl(tcp, code, arg);
398 #endif
399 case _IOC_NR(EVIOCGNAME(0)):
400 case _IOC_NR(EVIOCGPHYS(0)):
401 case _IOC_NR(EVIOCGUNIQ(0)):
402 tprints(", ");
403 printstr(tcp, arg, tcp->u_rval - 1);
404 return 1;
405 #ifdef EVIOCGPROP
406 case _IOC_NR(EVIOCGPROP(0)):
407 return decode_bitset(tcp, arg,
408 evdev_prop, INPUT_PROP_MAX, "PROP_???");
409 #endif
410 case _IOC_NR(EVIOCGSND(0)):
411 return decode_bitset(tcp, arg,
412 evdev_snd, SND_MAX, "SND_???");
413 #ifdef EVIOCGSW
414 case _IOC_NR(EVIOCGSW(0)):
415 return decode_bitset(tcp, arg,
416 evdev_switch, SW_MAX, "SW_???");
417 #endif
418 case _IOC_NR(EVIOCGKEY(0)):
419 return decode_bitset(tcp, arg,
420 evdev_keycode, KEY_MAX, "KEY_???");
421 case _IOC_NR(EVIOCGLED(0)):
422 return decode_bitset(tcp, arg,
423 evdev_leds, LED_MAX, "LED_???");
424 default:
425 return 0;
426 }
427 }
428
429 static int
evdev_write_ioctl(struct tcb * tcp,const unsigned int code,long arg)430 evdev_write_ioctl(struct tcb *tcp, const unsigned int code, long arg)
431 {
432 if (exiting(tcp))
433 return 1;
434
435 if ((_IOC_NR(code) & ~ABS_MAX) == _IOC_NR(EVIOCSABS(0)))
436 return abs_ioctl(tcp, arg);
437
438 switch (code) {
439 #ifdef EVIOCSREP
440 case EVIOCSREP:
441 return repeat_ioctl(tcp, arg);
442 #endif
443 case EVIOCSKEYCODE:
444 return keycode_ioctl(tcp, arg);
445 #ifdef EVIOCSKEYCODE_V2
446 case EVIOCSKEYCODE_V2:
447 return keycode_V2_ioctl(tcp, arg);
448 #endif
449 case EVIOCSFF:
450 return ff_effect_ioctl(tcp, arg);
451 case EVIOCRMFF:
452 #ifdef EVIOCSCLOCKID
453 case EVIOCSCLOCKID:
454 #endif
455 case EVIOCGRAB:
456 #ifdef EVIOCREVOKE
457 case EVIOCREVOKE:
458 #endif
459 tprints(", ");
460 printnum_int(tcp, arg, "%u");
461 return 1;
462 default:
463 return 0;
464 }
465 }
466
467 int
evdev_ioctl(struct tcb * tcp,const unsigned int code,long arg)468 evdev_ioctl(struct tcb *tcp, const unsigned int code, long arg)
469 {
470 switch(_IOC_DIR(code)) {
471 case _IOC_READ:
472 return evdev_read_ioctl(tcp, code, arg);
473 case _IOC_WRITE:
474 if (!evdev_write_ioctl(tcp, code, arg))
475 tprintf(", %lx", arg);
476 return 1;
477 default:
478 return 0;
479 }
480 }
481
482 #endif /* HAVE_LINUX_INPUT_H */
483