drivers/staging/speakup/kobjects.c

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