1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Speakup kobject implementation
4 *
5 * Copyright (C) 2009 William Hubbs
6 *
7 * This code is based on kobject-example.c, which came with linux 2.6.x.
8 *
9 * Copyright (C) 2004-2007 Greg Kroah-Hartman <greg@kroah.com>
10 * Copyright (C) 2007 Novell Inc.
11 *
12 * Released under the GPL version 2 only.
13 *
14 */
15 #include <linux/slab.h> /* For kmalloc. */
16 #include <linux/kernel.h>
17 #include <linux/kobject.h>
18 #include <linux/string.h>
19 #include <linux/string_helpers.h>
20 #include <linux/sysfs.h>
21 #include <linux/ctype.h>
22
23 #include "speakup.h"
24 #include "spk_priv.h"
25
26 /*
27 * This is called when a user reads the characters or chartab sys file.
28 */
chars_chartab_show(struct kobject * kobj,struct kobj_attribute * attr,char * buf)29 static ssize_t chars_chartab_show(struct kobject *kobj,
30 struct kobj_attribute *attr, char *buf)
31 {
32 int i;
33 int len = 0;
34 char *cp;
35 char *buf_pointer = buf;
36 size_t bufsize = PAGE_SIZE;
37 unsigned long flags;
38
39 spin_lock_irqsave(&speakup_info.spinlock, flags);
40 *buf_pointer = '\0';
41 for (i = 0; i < 256; i++) {
42 if (bufsize <= 1)
43 break;
44 if (strcmp("characters", attr->attr.name) == 0) {
45 len = scnprintf(buf_pointer, bufsize, "%d\t%s\n",
46 i, spk_characters[i]);
47 } else { /* show chartab entry */
48 if (IS_TYPE(i, B_CTL))
49 cp = "B_CTL";
50 else if (IS_TYPE(i, WDLM))
51 cp = "WDLM";
52 else if (IS_TYPE(i, A_PUNC))
53 cp = "A_PUNC";
54 else if (IS_TYPE(i, PUNC))
55 cp = "PUNC";
56 else if (IS_TYPE(i, NUM))
57 cp = "NUM";
58 else if (IS_TYPE(i, A_CAP))
59 cp = "A_CAP";
60 else if (IS_TYPE(i, ALPHA))
61 cp = "ALPHA";
62 else if (IS_TYPE(i, B_CAPSYM))
63 cp = "B_CAPSYM";
64 else if (IS_TYPE(i, B_SYM))
65 cp = "B_SYM";
66 else
67 cp = "0";
68 len =
69 scnprintf(buf_pointer, bufsize, "%d\t%s\n", i, cp);
70 }
71 bufsize -= len;
72 buf_pointer += len;
73 }
74 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
75 return buf_pointer - buf;
76 }
77
78 /*
79 * Print informational messages or warnings after updating
80 * character descriptions or chartab entries.
81 */
report_char_chartab_status(int reset,int received,int used,int rejected,int do_characters)82 static void report_char_chartab_status(int reset, int received, int used,
83 int rejected, int do_characters)
84 {
85 static char const *object_type[] = {
86 "character class entries",
87 "character descriptions",
88 };
89 int len;
90 char buf[80];
91
92 if (reset) {
93 pr_info("%s reset to defaults\n", object_type[do_characters]);
94 } else if (received) {
95 len = snprintf(buf, sizeof(buf),
96 " updated %d of %d %s\n",
97 used, received, object_type[do_characters]);
98 if (rejected)
99 snprintf(buf + (len - 1), sizeof(buf) - (len - 1),
100 " with %d reject%s\n",
101 rejected, rejected > 1 ? "s" : "");
102 pr_info("%s", buf);
103 }
104 }
105
106 /*
107 * This is called when a user changes the characters or chartab parameters.
108 */
chars_chartab_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t count)109 static ssize_t chars_chartab_store(struct kobject *kobj,
110 struct kobj_attribute *attr,
111 const char *buf, size_t count)
112 {
113 char *cp = (char *)buf;
114 char *end = cp + count; /* the null at the end of the buffer */
115 char *linefeed = NULL;
116 char keyword[MAX_DESC_LEN + 1];
117 char *outptr = NULL; /* Will hold keyword or desc. */
118 char *temp = NULL;
119 char *desc = NULL;
120 ssize_t retval = count;
121 unsigned long flags;
122 unsigned long index = 0;
123 int charclass = 0;
124 int received = 0;
125 int used = 0;
126 int rejected = 0;
127 int reset = 0;
128 int do_characters = !strcmp(attr->attr.name, "characters");
129 size_t desc_length = 0;
130 int i;
131
132 spin_lock_irqsave(&speakup_info.spinlock, flags);
133 while (cp < end) {
134 while ((cp < end) && (*cp == ' ' || *cp == '\t'))
135 cp++;
136
137 if (cp == end)
138 break;
139 if ((*cp == '\n') || strchr("dDrR", *cp)) {
140 reset = 1;
141 break;
142 }
143 received++;
144
145 linefeed = strchr(cp, '\n');
146 if (!linefeed) {
147 rejected++;
148 break;
149 }
150
151 if (!isdigit(*cp)) {
152 rejected++;
153 cp = linefeed + 1;
154 continue;
155 }
156
157 /*
158 * Do not replace with kstrtoul:
159 * here we need temp to be updated
160 */
161 index = simple_strtoul(cp, &temp, 10);
162 if (index > 255) {
163 rejected++;
164 cp = linefeed + 1;
165 continue;
166 }
167
168 while ((temp < linefeed) && (*temp == ' ' || *temp == '\t'))
169 temp++;
170
171 desc_length = linefeed - temp;
172 if (desc_length > MAX_DESC_LEN) {
173 rejected++;
174 cp = linefeed + 1;
175 continue;
176 }
177 if (do_characters) {
178 desc = kmalloc(desc_length + 1, GFP_ATOMIC);
179 if (!desc) {
180 retval = -ENOMEM;
181 reset = 1; /* just reset on error. */
182 break;
183 }
184 outptr = desc;
185 } else {
186 outptr = keyword;
187 }
188
189 for (i = 0; i < desc_length; i++)
190 outptr[i] = temp[i];
191 outptr[desc_length] = '\0';
192
193 if (do_characters) {
194 if (spk_characters[index] != spk_default_chars[index])
195 kfree(spk_characters[index]);
196 spk_characters[index] = desc;
197 used++;
198 } else {
199 charclass = spk_chartab_get_value(keyword);
200 if (charclass == 0) {
201 rejected++;
202 cp = linefeed + 1;
203 continue;
204 }
205 if (charclass != spk_chartab[index]) {
206 spk_chartab[index] = charclass;
207 used++;
208 }
209 }
210 cp = linefeed + 1;
211 }
212
213 if (reset) {
214 if (do_characters)
215 spk_reset_default_chars();
216 else
217 spk_reset_default_chartab();
218 }
219
220 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
221 report_char_chartab_status(reset, received, used, rejected,
222 do_characters);
223 return retval;
224 }
225
226 /*
227 * This is called when a user reads the keymap parameter.
228 */
keymap_show(struct kobject * kobj,struct kobj_attribute * attr,char * buf)229 static ssize_t keymap_show(struct kobject *kobj, struct kobj_attribute *attr,
230 char *buf)
231 {
232 char *cp = buf;
233 int i;
234 int n;
235 int num_keys;
236 int nstates;
237 u_char *cp1;
238 u_char ch;
239 unsigned long flags;
240
241 spin_lock_irqsave(&speakup_info.spinlock, flags);
242 cp1 = spk_key_buf + SHIFT_TBL_SIZE;
243 num_keys = (int)(*cp1);
244 nstates = (int)cp1[1];
245 cp += sprintf(cp, "%d, %d, %d,\n", KEY_MAP_VER, num_keys, nstates);
246 cp1 += 2; /* now pointing at shift states */
247 /* dump num_keys+1 as first row is shift states + flags,
248 * each subsequent row is key + states
249 */
250 for (n = 0; n <= num_keys; n++) {
251 for (i = 0; i <= nstates; i++) {
252 ch = *cp1++;
253 cp += sprintf(cp, "%d,", (int)ch);
254 *cp++ = (i < nstates) ? SPACE : '\n';
255 }
256 }
257 cp += sprintf(cp, "0, %d\n", KEY_MAP_VER);
258 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
259 return (int)(cp - buf);
260 }
261
262 /*
263 * This is called when a user changes the keymap parameter.
264 */
keymap_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t count)265 static ssize_t keymap_store(struct kobject *kobj, struct kobj_attribute *attr,
266 const char *buf, size_t count)
267 {
268 int i;
269 ssize_t ret = count;
270 char *in_buff = NULL;
271 char *cp;
272 u_char *cp1;
273 unsigned long flags;
274
275 spin_lock_irqsave(&speakup_info.spinlock, flags);
276 in_buff = kmemdup(buf, count + 1, GFP_ATOMIC);
277 if (!in_buff) {
278 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
279 return -ENOMEM;
280 }
281 if (strchr("dDrR", *in_buff)) {
282 spk_set_key_info(spk_key_defaults, spk_key_buf);
283 pr_info("keymap set to default values\n");
284 kfree(in_buff);
285 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
286 return count;
287 }
288 if (in_buff[count - 1] == '\n')
289 in_buff[count - 1] = '\0';
290 cp = in_buff;
291 cp1 = (u_char *)in_buff;
292 for (i = 0; i < 3; i++) {
293 cp = spk_s2uchar(cp, cp1);
294 cp1++;
295 }
296 i = (int)cp1[-2] + 1;
297 i *= (int)cp1[-1] + 1;
298 i += 2; /* 0 and last map ver */
299 if (cp1[-3] != KEY_MAP_VER || cp1[-1] > 10 ||
300 i + SHIFT_TBL_SIZE + 4 >= sizeof(spk_key_buf)) {
301 pr_warn("i %d %d %d %d\n", i,
302 (int)cp1[-3], (int)cp1[-2], (int)cp1[-1]);
303 kfree(in_buff);
304 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
305 return -EINVAL;
306 }
307 while (--i >= 0) {
308 cp = spk_s2uchar(cp, cp1);
309 cp1++;
310 if (!(*cp))
311 break;
312 }
313 if (i != 0 || cp1[-1] != KEY_MAP_VER || cp1[-2] != 0) {
314 ret = -EINVAL;
315 pr_warn("end %d %d %d %d\n", i,
316 (int)cp1[-3], (int)cp1[-2], (int)cp1[-1]);
317 } else {
318 if (spk_set_key_info(in_buff, spk_key_buf)) {
319 spk_set_key_info(spk_key_defaults, spk_key_buf);
320 ret = -EINVAL;
321 pr_warn("set key failed\n");
322 }
323 }
324 kfree(in_buff);
325 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
326 return ret;
327 }
328
329 /*
330 * This is called when a user changes the value of the silent parameter.
331 */
silent_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t count)332 static ssize_t silent_store(struct kobject *kobj, struct kobj_attribute *attr,
333 const char *buf, size_t count)
334 {
335 int len;
336 struct vc_data *vc = vc_cons[fg_console].d;
337 char ch = 0;
338 char shut;
339 unsigned long flags;
340
341 len = strlen(buf);
342 if (len > 0 && len < 3) {
343 ch = buf[0];
344 if (ch == '\n')
345 ch = '0';
346 }
347 if (ch < '0' || ch > '7') {
348 pr_warn("silent value '%c' not in range (0,7)\n", ch);
349 return -EINVAL;
350 }
351 spin_lock_irqsave(&speakup_info.spinlock, flags);
352 if (ch & 2) {
353 shut = 1;
354 spk_do_flush();
355 } else {
356 shut = 0;
357 }
358 if (ch & 4)
359 shut |= 0x40;
360 if (ch & 1)
361 spk_shut_up |= shut;
362 else
363 spk_shut_up &= ~shut;
364 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
365 return count;
366 }
367
368 /*
369 * This is called when a user reads the synth setting.
370 */
synth_show(struct kobject * kobj,struct kobj_attribute * attr,char * buf)371 static ssize_t synth_show(struct kobject *kobj, struct kobj_attribute *attr,
372 char *buf)
373 {
374 int rv;
375
376 if (!synth)
377 rv = sprintf(buf, "%s\n", "none");
378 else
379 rv = sprintf(buf, "%s\n", synth->name);
380 return rv;
381 }
382
383 /*
384 * This is called when a user requests to change synthesizers.
385 */
synth_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t count)386 static ssize_t synth_store(struct kobject *kobj, struct kobj_attribute *attr,
387 const char *buf, size_t count)
388 {
389 int len;
390 char new_synth_name[10];
391
392 len = strlen(buf);
393 if (len < 2 || len > 9)
394 return -EINVAL;
395 memcpy(new_synth_name, buf, len);
396 if (new_synth_name[len - 1] == '\n')
397 len--;
398 new_synth_name[len] = '\0';
399 spk_strlwr(new_synth_name);
400 if (synth && !strcmp(new_synth_name, synth->name)) {
401 pr_warn("%s already in use\n", new_synth_name);
402 } else if (synth_init(new_synth_name) != 0) {
403 pr_warn("failed to init synth %s\n", new_synth_name);
404 return -ENODEV;
405 }
406 return count;
407 }
408
409 /*
410 * This is called when text is sent to the synth via the synth_direct file.
411 */
synth_direct_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t count)412 static ssize_t synth_direct_store(struct kobject *kobj,
413 struct kobj_attribute *attr,
414 const char *buf, size_t count)
415 {
416 char *unescaped;
417 unsigned long flags;
418
419 if (!synth)
420 return -EPERM;
421
422 unescaped = kstrdup(buf, GFP_KERNEL);
423 if (!unescaped)
424 return -ENOMEM;
425
426 string_unescape_any_inplace(unescaped);
427
428 spin_lock_irqsave(&speakup_info.spinlock, flags);
429 synth_write(unescaped, strlen(unescaped));
430 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
431
432 kfree(unescaped);
433
434 return count;
435 }
436
437 /*
438 * This function is called when a user reads the version.
439 */
version_show(struct kobject * kobj,struct kobj_attribute * attr,char * buf)440 static ssize_t version_show(struct kobject *kobj, struct kobj_attribute *attr,
441 char *buf)
442 {
443 char *cp;
444
445 cp = buf;
446 cp += sprintf(cp, "Speakup version %s\n", SPEAKUP_VERSION);
447 if (synth)
448 cp += sprintf(cp, "%s synthesizer driver version %s\n",
449 synth->name, synth->version);
450 return cp - buf;
451 }
452
453 /*
454 * This is called when a user reads the punctuation settings.
455 */
punc_show(struct kobject * kobj,struct kobj_attribute * attr,char * buf)456 static ssize_t punc_show(struct kobject *kobj, struct kobj_attribute *attr,
457 char *buf)
458 {
459 int i;
460 char *cp = buf;
461 struct st_var_header *p_header;
462 struct punc_var_t *var;
463 struct st_bits_data *pb;
464 short mask;
465 unsigned long flags;
466
467 p_header = spk_var_header_by_name(attr->attr.name);
468 if (!p_header) {
469 pr_warn("p_header is null, attr->attr.name is %s\n",
470 attr->attr.name);
471 return -EINVAL;
472 }
473
474 var = spk_get_punc_var(p_header->var_id);
475 if (!var) {
476 pr_warn("var is null, p_header->var_id is %i\n",
477 p_header->var_id);
478 return -EINVAL;
479 }
480
481 spin_lock_irqsave(&speakup_info.spinlock, flags);
482 pb = (struct st_bits_data *)&spk_punc_info[var->value];
483 mask = pb->mask;
484 for (i = 33; i < 128; i++) {
485 if (!(spk_chartab[i] & mask))
486 continue;
487 *cp++ = (char)i;
488 }
489 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
490 return cp - buf;
491 }
492
493 /*
494 * This is called when a user changes the punctuation settings.
495 */
punc_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t count)496 static ssize_t punc_store(struct kobject *kobj, struct kobj_attribute *attr,
497 const char *buf, size_t count)
498 {
499 int x;
500 struct st_var_header *p_header;
501 struct punc_var_t *var;
502 char punc_buf[100];
503 unsigned long flags;
504
505 x = strlen(buf);
506 if (x < 1 || x > 99)
507 return -EINVAL;
508
509 p_header = spk_var_header_by_name(attr->attr.name);
510 if (!p_header) {
511 pr_warn("p_header is null, attr->attr.name is %s\n",
512 attr->attr.name);
513 return -EINVAL;
514 }
515
516 var = spk_get_punc_var(p_header->var_id);
517 if (!var) {
518 pr_warn("var is null, p_header->var_id is %i\n",
519 p_header->var_id);
520 return -EINVAL;
521 }
522
523 memcpy(punc_buf, buf, x);
524
525 while (x && punc_buf[x - 1] == '\n')
526 x--;
527 punc_buf[x] = '\0';
528
529 spin_lock_irqsave(&speakup_info.spinlock, flags);
530
531 if (*punc_buf == 'd' || *punc_buf == 'r')
532 x = spk_set_mask_bits(NULL, var->value, 3);
533 else
534 x = spk_set_mask_bits(punc_buf, var->value, 3);
535
536 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
537 return count;
538 }
539
540 /*
541 * This function is called when a user reads one of the variable parameters.
542 */
spk_var_show(struct kobject * kobj,struct kobj_attribute * attr,char * buf)543 ssize_t spk_var_show(struct kobject *kobj, struct kobj_attribute *attr,
544 char *buf)
545 {
546 int rv = 0;
547 struct st_var_header *param;
548 struct var_t *var;
549 char *cp1;
550 char *cp;
551 char ch;
552 unsigned long flags;
553
554 param = spk_var_header_by_name(attr->attr.name);
555 if (!param)
556 return -EINVAL;
557
558 spin_lock_irqsave(&speakup_info.spinlock, flags);
559 var = (struct var_t *)param->data;
560 switch (param->var_type) {
561 case VAR_NUM:
562 case VAR_TIME:
563 if (var)
564 rv = sprintf(buf, "%i\n", var->u.n.value);
565 else
566 rv = sprintf(buf, "0\n");
567 break;
568 case VAR_STRING:
569 if (var) {
570 cp1 = buf;
571 *cp1++ = '"';
572 for (cp = (char *)param->p_val; (ch = *cp); cp++) {
573 if (ch >= ' ' && ch < '~')
574 *cp1++ = ch;
575 else
576 cp1 += sprintf(cp1, "\\x%02x", ch);
577 }
578 *cp1++ = '"';
579 *cp1++ = '\n';
580 *cp1 = '\0';
581 rv = cp1 - buf;
582 } else {
583 rv = sprintf(buf, "\"\"\n");
584 }
585 break;
586 default:
587 rv = sprintf(buf, "Bad parameter %s, type %i\n",
588 param->name, param->var_type);
589 break;
590 }
591 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
592 return rv;
593 }
594 EXPORT_SYMBOL_GPL(spk_var_show);
595
596 /*
597 * Used to reset either default_pitch or default_vol.
598 */
spk_reset_default_value(char * header_name,int * synth_default_value,int idx)599 static inline void spk_reset_default_value(char *header_name,
600 int *synth_default_value, int idx)
601 {
602 struct st_var_header *param;
603
604 if (synth && synth_default_value) {
605 param = spk_var_header_by_name(header_name);
606 if (param) {
607 spk_set_num_var(synth_default_value[idx],
608 param, E_NEW_DEFAULT);
609 spk_set_num_var(0, param, E_DEFAULT);
610 pr_info("%s reset to default value\n", param->name);
611 }
612 }
613 }
614
615 /*
616 * This function is called when a user echos a value to one of the
617 * variable parameters.
618 */
spk_var_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t count)619 ssize_t spk_var_store(struct kobject *kobj, struct kobj_attribute *attr,
620 const char *buf, size_t count)
621 {
622 struct st_var_header *param;
623 int ret;
624 int len;
625 char *cp;
626 struct var_t *var_data;
627 long value;
628 unsigned long flags;
629
630 param = spk_var_header_by_name(attr->attr.name);
631 if (!param)
632 return -EINVAL;
633 if (!param->data)
634 return 0;
635 ret = 0;
636 cp = (char *)buf;
637 string_unescape_any_inplace(cp);
638
639 spin_lock_irqsave(&speakup_info.spinlock, flags);
640 switch (param->var_type) {
641 case VAR_NUM:
642 case VAR_TIME:
643 if (*cp == 'd' || *cp == 'r' || *cp == '\0')
644 len = E_DEFAULT;
645 else if (*cp == '+' || *cp == '-')
646 len = E_INC;
647 else
648 len = E_SET;
649 if (kstrtol(cp, 10, &value) == 0)
650 ret = spk_set_num_var(value, param, len);
651 else
652 pr_warn("overflow or parsing error has occurred");
653 if (ret == -ERANGE) {
654 var_data = param->data;
655 pr_warn("value for %s out of range, expect %d to %d\n",
656 param->name,
657 var_data->u.n.low, var_data->u.n.high);
658 }
659
660 /*
661 * If voice was just changed, we might need to reset our default
662 * pitch and volume.
663 */
664 if (param->var_id == VOICE && synth &&
665 (ret == 0 || ret == -ERESTART)) {
666 var_data = param->data;
667 value = var_data->u.n.value;
668 spk_reset_default_value("pitch", synth->default_pitch,
669 value);
670 spk_reset_default_value("vol", synth->default_vol,
671 value);
672 }
673 break;
674 case VAR_STRING:
675 len = strlen(cp);
676 if ((len >= 1) && (cp[len - 1] == '\n'))
677 --len;
678 if ((len >= 2) && (cp[0] == '"') && (cp[len - 1] == '"')) {
679 ++cp;
680 len -= 2;
681 }
682 cp[len] = '\0';
683 ret = spk_set_string_var(cp, param, len);
684 if (ret == -E2BIG)
685 pr_warn("value too long for %s\n",
686 param->name);
687 break;
688 default:
689 pr_warn("%s unknown type %d\n",
690 param->name, (int)param->var_type);
691 break;
692 }
693 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
694
695 if (ret == -ERESTART)
696 pr_info("%s reset to default value\n", param->name);
697 return count;
698 }
699 EXPORT_SYMBOL_GPL(spk_var_store);
700
701 /*
702 * Functions for reading and writing lists of i18n messages. Incomplete.
703 */
704
message_show_helper(char * buf,enum msg_index_t first,enum msg_index_t last)705 static ssize_t message_show_helper(char *buf, enum msg_index_t first,
706 enum msg_index_t last)
707 {
708 size_t bufsize = PAGE_SIZE;
709 char *buf_pointer = buf;
710 int printed;
711 enum msg_index_t cursor;
712 int index = 0;
713 *buf_pointer = '\0'; /* buf_pointer always looking at a NUL byte. */
714
715 for (cursor = first; cursor <= last; cursor++, index++) {
716 if (bufsize <= 1)
717 break;
718 printed = scnprintf(buf_pointer, bufsize, "%d\t%s\n",
719 index, spk_msg_get(cursor));
720 buf_pointer += printed;
721 bufsize -= printed;
722 }
723
724 return buf_pointer - buf;
725 }
726
report_msg_status(int reset,int received,int used,int rejected,char * groupname)727 static void report_msg_status(int reset, int received, int used,
728 int rejected, char *groupname)
729 {
730 int len;
731 char buf[160];
732
733 if (reset) {
734 pr_info("i18n messages from group %s reset to defaults\n",
735 groupname);
736 } else if (received) {
737 len = snprintf(buf, sizeof(buf),
738 " updated %d of %d i18n messages from group %s\n",
739 used, received, groupname);
740 if (rejected)
741 snprintf(buf + (len - 1), sizeof(buf) - (len - 1),
742 " with %d reject%s\n",
743 rejected, rejected > 1 ? "s" : "");
744 pr_info("%s", buf);
745 }
746 }
747
message_store_helper(const char * buf,size_t count,struct msg_group_t * group)748 static ssize_t message_store_helper(const char *buf, size_t count,
749 struct msg_group_t *group)
750 {
751 char *cp = (char *)buf;
752 char *end = cp + count;
753 char *linefeed = NULL;
754 char *temp = NULL;
755 ssize_t msg_stored = 0;
756 ssize_t retval = count;
757 size_t desc_length = 0;
758 unsigned long index = 0;
759 int received = 0;
760 int used = 0;
761 int rejected = 0;
762 int reset = 0;
763 enum msg_index_t firstmessage = group->start;
764 enum msg_index_t lastmessage = group->end;
765 enum msg_index_t curmessage;
766
767 while (cp < end) {
768 while ((cp < end) && (*cp == ' ' || *cp == '\t'))
769 cp++;
770
771 if (cp == end)
772 break;
773 if (strchr("dDrR", *cp)) {
774 reset = 1;
775 break;
776 }
777 received++;
778
779 linefeed = strchr(cp, '\n');
780 if (!linefeed) {
781 rejected++;
782 break;
783 }
784
785 if (!isdigit(*cp)) {
786 rejected++;
787 cp = linefeed + 1;
788 continue;
789 }
790
791 /*
792 * Do not replace with kstrtoul:
793 * here we need temp to be updated
794 */
795 index = simple_strtoul(cp, &temp, 10);
796
797 while ((temp < linefeed) && (*temp == ' ' || *temp == '\t'))
798 temp++;
799
800 desc_length = linefeed - temp;
801 curmessage = firstmessage + index;
802
803 /*
804 * Note the check (curmessage < firstmessage). It is not
805 * redundant. Suppose that the user gave us an index
806 * equal to ULONG_MAX - 1. If firstmessage > 1, then
807 * firstmessage + index < firstmessage!
808 */
809
810 if ((curmessage < firstmessage) || (curmessage > lastmessage)) {
811 rejected++;
812 cp = linefeed + 1;
813 continue;
814 }
815
816 msg_stored = spk_msg_set(curmessage, temp, desc_length);
817 if (msg_stored < 0) {
818 retval = msg_stored;
819 if (msg_stored == -ENOMEM)
820 reset = 1;
821 break;
822 }
823
824 used++;
825
826 cp = linefeed + 1;
827 }
828
829 if (reset)
830 spk_reset_msg_group(group);
831
832 report_msg_status(reset, received, used, rejected, group->name);
833 return retval;
834 }
835
message_show(struct kobject * kobj,struct kobj_attribute * attr,char * buf)836 static ssize_t message_show(struct kobject *kobj,
837 struct kobj_attribute *attr, char *buf)
838 {
839 ssize_t retval = 0;
840 struct msg_group_t *group = spk_find_msg_group(attr->attr.name);
841 unsigned long flags;
842
843 if (WARN_ON(!group))
844 return -EINVAL;
845
846 spin_lock_irqsave(&speakup_info.spinlock, flags);
847 retval = message_show_helper(buf, group->start, group->end);
848 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
849 return retval;
850 }
851
message_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t count)852 static ssize_t message_store(struct kobject *kobj, struct kobj_attribute *attr,
853 const char *buf, size_t count)
854 {
855 struct msg_group_t *group = spk_find_msg_group(attr->attr.name);
856
857 if (WARN_ON(!group))
858 return -EINVAL;
859
860 return message_store_helper(buf, count, group);
861 }
862
863 /*
864 * Declare the attributes.
865 */
866 static struct kobj_attribute keymap_attribute =
867 __ATTR_RW(keymap);
868 static struct kobj_attribute silent_attribute =
869 __ATTR_WO(silent);
870 static struct kobj_attribute synth_attribute =
871 __ATTR_RW(synth);
872 static struct kobj_attribute synth_direct_attribute =
873 __ATTR_WO(synth_direct);
874 static struct kobj_attribute version_attribute =
875 __ATTR_RO(version);
876
877 static struct kobj_attribute delimiters_attribute =
878 __ATTR(delimiters, 0644, punc_show, punc_store);
879 static struct kobj_attribute ex_num_attribute =
880 __ATTR(ex_num, 0644, punc_show, punc_store);
881 static struct kobj_attribute punc_all_attribute =
882 __ATTR(punc_all, 0644, punc_show, punc_store);
883 static struct kobj_attribute punc_most_attribute =
884 __ATTR(punc_most, 0644, punc_show, punc_store);
885 static struct kobj_attribute punc_some_attribute =
886 __ATTR(punc_some, 0644, punc_show, punc_store);
887 static struct kobj_attribute repeats_attribute =
888 __ATTR(repeats, 0644, punc_show, punc_store);
889
890 static struct kobj_attribute attrib_bleep_attribute =
891 __ATTR(attrib_bleep, 0644, spk_var_show, spk_var_store);
892 static struct kobj_attribute bell_pos_attribute =
893 __ATTR(bell_pos, 0644, spk_var_show, spk_var_store);
894 static struct kobj_attribute bleep_time_attribute =
895 __ATTR(bleep_time, 0644, spk_var_show, spk_var_store);
896 static struct kobj_attribute bleeps_attribute =
897 __ATTR(bleeps, 0644, spk_var_show, spk_var_store);
898 static struct kobj_attribute cursor_time_attribute =
899 __ATTR(cursor_time, 0644, spk_var_show, spk_var_store);
900 static struct kobj_attribute key_echo_attribute =
901 __ATTR(key_echo, 0644, spk_var_show, spk_var_store);
902 static struct kobj_attribute no_interrupt_attribute =
903 __ATTR(no_interrupt, 0644, spk_var_show, spk_var_store);
904 static struct kobj_attribute punc_level_attribute =
905 __ATTR(punc_level, 0644, spk_var_show, spk_var_store);
906 static struct kobj_attribute reading_punc_attribute =
907 __ATTR(reading_punc, 0644, spk_var_show, spk_var_store);
908 static struct kobj_attribute say_control_attribute =
909 __ATTR(say_control, 0644, spk_var_show, spk_var_store);
910 static struct kobj_attribute say_word_ctl_attribute =
911 __ATTR(say_word_ctl, 0644, spk_var_show, spk_var_store);
912 static struct kobj_attribute spell_delay_attribute =
913 __ATTR(spell_delay, 0644, spk_var_show, spk_var_store);
914 static struct kobj_attribute cur_phonetic_attribute =
915 __ATTR(cur_phonetic, 0644, spk_var_show, spk_var_store);
916
917 /*
918 * These attributes are i18n related.
919 */
920 static struct kobj_attribute announcements_attribute =
921 __ATTR(announcements, 0644, message_show, message_store);
922 static struct kobj_attribute characters_attribute =
923 __ATTR(characters, 0644, chars_chartab_show,
924 chars_chartab_store);
925 static struct kobj_attribute chartab_attribute =
926 __ATTR(chartab, 0644, chars_chartab_show,
927 chars_chartab_store);
928 static struct kobj_attribute ctl_keys_attribute =
929 __ATTR(ctl_keys, 0644, message_show, message_store);
930 static struct kobj_attribute colors_attribute =
931 __ATTR(colors, 0644, message_show, message_store);
932 static struct kobj_attribute formatted_attribute =
933 __ATTR(formatted, 0644, message_show, message_store);
934 static struct kobj_attribute function_names_attribute =
935 __ATTR(function_names, 0644, message_show, message_store);
936 static struct kobj_attribute key_names_attribute =
937 __ATTR(key_names, 0644, message_show, message_store);
938 static struct kobj_attribute states_attribute =
939 __ATTR(states, 0644, message_show, message_store);
940
941 /*
942 * Create groups of attributes so that we can create and destroy them all
943 * at once.
944 */
945 static struct attribute *main_attrs[] = {
946 &keymap_attribute.attr,
947 &silent_attribute.attr,
948 &synth_attribute.attr,
949 &synth_direct_attribute.attr,
950 &version_attribute.attr,
951 &delimiters_attribute.attr,
952 &ex_num_attribute.attr,
953 &punc_all_attribute.attr,
954 &punc_most_attribute.attr,
955 &punc_some_attribute.attr,
956 &repeats_attribute.attr,
957 &attrib_bleep_attribute.attr,
958 &bell_pos_attribute.attr,
959 &bleep_time_attribute.attr,
960 &bleeps_attribute.attr,
961 &cursor_time_attribute.attr,
962 &key_echo_attribute.attr,
963 &no_interrupt_attribute.attr,
964 &punc_level_attribute.attr,
965 &reading_punc_attribute.attr,
966 &say_control_attribute.attr,
967 &say_word_ctl_attribute.attr,
968 &spell_delay_attribute.attr,
969 &cur_phonetic_attribute.attr,
970 NULL,
971 };
972
973 static struct attribute *i18n_attrs[] = {
974 &announcements_attribute.attr,
975 &characters_attribute.attr,
976 &chartab_attribute.attr,
977 &ctl_keys_attribute.attr,
978 &colors_attribute.attr,
979 &formatted_attribute.attr,
980 &function_names_attribute.attr,
981 &key_names_attribute.attr,
982 &states_attribute.attr,
983 NULL,
984 };
985
986 /*
987 * An unnamed attribute group will put all of the attributes directly in
988 * the kobject directory. If we specify a name, a subdirectory will be
989 * created for the attributes with the directory being the name of the
990 * attribute group.
991 */
992 static const struct attribute_group main_attr_group = {
993 .attrs = main_attrs,
994 };
995
996 static const struct attribute_group i18n_attr_group = {
997 .attrs = i18n_attrs,
998 .name = "i18n",
999 };
1000
1001 static struct kobject *accessibility_kobj;
1002 struct kobject *speakup_kobj;
1003
speakup_kobj_init(void)1004 int speakup_kobj_init(void)
1005 {
1006 int retval;
1007
1008 /*
1009 * Create a simple kobject with the name of "accessibility",
1010 * located under /sys/
1011 *
1012 * As this is a simple directory, no uevent will be sent to
1013 * userspace. That is why this function should not be used for
1014 * any type of dynamic kobjects, where the name and number are
1015 * not known ahead of time.
1016 */
1017 accessibility_kobj = kobject_create_and_add("accessibility", NULL);
1018 if (!accessibility_kobj) {
1019 retval = -ENOMEM;
1020 goto out;
1021 }
1022
1023 speakup_kobj = kobject_create_and_add("speakup", accessibility_kobj);
1024 if (!speakup_kobj) {
1025 retval = -ENOMEM;
1026 goto err_acc;
1027 }
1028
1029 /* Create the files associated with this kobject */
1030 retval = sysfs_create_group(speakup_kobj, &main_attr_group);
1031 if (retval)
1032 goto err_speakup;
1033
1034 retval = sysfs_create_group(speakup_kobj, &i18n_attr_group);
1035 if (retval)
1036 goto err_group;
1037
1038 goto out;
1039
1040 err_group:
1041 sysfs_remove_group(speakup_kobj, &main_attr_group);
1042 err_speakup:
1043 kobject_put(speakup_kobj);
1044 err_acc:
1045 kobject_put(accessibility_kobj);
1046 out:
1047 return retval;
1048 }
1049
speakup_kobj_exit(void)1050 void speakup_kobj_exit(void)
1051 {
1052 sysfs_remove_group(speakup_kobj, &i18n_attr_group);
1053 sysfs_remove_group(speakup_kobj, &main_attr_group);
1054 kobject_put(speakup_kobj);
1055 kobject_put(accessibility_kobj);
1056 }
1057