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/sysfs.h>
  19 #include <linux/ctype.h>
  20
  21 #include "speakup.h"
  22 #include "spk_priv.h"
  23
  24 /*
  25  * This is called when a user reads the characters or chartab sys file.
  26  */
  27 static ssize_t chars_chartab_show(struct kobject *kobj,
  28         struct kobj_attribute *attr, char *buf)
  29 {
  30         int i;
  31         int len = 0;
  32         char *cp;
  33         char *buf_pointer = buf;
  34         size_t bufsize = PAGE_SIZE;
  35         unsigned long flags;
  36
  37         spk_lock(flags);
  38         *buf_pointer = '\0';
  39         for (i = 0; i < 256; i++) {
  40                 if (bufsize <= 1)
  41                         break;
  42                 if (strcmp("characters", attr->attr.name) == 0) {
  43                         len = scnprintf(buf_pointer, bufsize, "%d\t%s\n",
  44                                         i, characters[i]);
  45                 } else {        /* show chartab entry */
  46                         if (IS_TYPE(i, B_CTL))
  47                                 cp = "B_CTL";
  48                         else if (IS_TYPE(i, WDLM))
  49                                 cp = "WDLM";
  50                         else if (IS_TYPE(i, A_PUNC))
  51                                 cp = "A_PUNC";
  52                         else if (IS_TYPE(i, PUNC))
  53                                 cp = "PUNC";
  54                         else if (IS_TYPE(i, NUM))
  55                                 cp = "NUM";
  56                         else if (IS_TYPE(i, A_CAP))
  57                                 cp = "A_CAP";
  58                         else if (IS_TYPE(i, ALPHA))
  59                                 cp = "ALPHA";
  60                         else if (IS_TYPE(i, B_CAPSYM))
  61                                 cp = "B_CAPSYM";
  62                         else if (IS_TYPE(i, B_SYM))
  63                                 cp = "B_SYM";
  64                         else
  65                                 cp = "0";
  66                         len =
  67                             scnprintf(buf_pointer, bufsize, "%d\t%s\n", i, cp);
  68                 }
  69                 bufsize -= len;
  70                 buf_pointer += len;
  71         }
  72         spk_unlock(flags);
  73         return buf_pointer - buf;
  74 }
  75
  76 /*
  77  * Print informational messages or warnings after updating
  78  * character descriptions or chartab entries.
  79  */
  80 static void report_char_chartab_status(int reset, int received, int used,
  81         int rejected, int do_characters)
  82 {
  83         char *object_type[] = {
  84                 "character class entries",
  85                 "character descriptions",
  86         };
  87         int len;
  88         char buf[80];
  89
  90         if (reset) {
  91                 pr_info("%s reset to defaults\n", object_type[do_characters]);
  92         } else if (received) {
  93                 len = snprintf(buf, sizeof(buf),
  94                                 " updated %d of %d %s\n",
  95                                 used, received, object_type[do_characters]);
  96                 if (rejected)
  97                         snprintf(buf + (len - 1), sizeof(buf) - (len - 1),
  98                                  " with %d reject%s\n",
  99                                  rejected, rejected > 1 ? "s" : "");
 100                 printk(buf);
 101         }
 102 }
 103
 104 /*
 105  * This is called when a user changes the characters or chartab parameters.
 106  */
 107 static ssize_t chars_chartab_store(struct kobject *kobj,
 108         struct kobj_attribute *attr, const char *buf, size_t count)
 109 {
 110         char *cp = (char *) buf;
 111         char *end = cp + count; /* the null at the end of the buffer */
 112         char *linefeed = NULL;
 113         char keyword[MAX_DESC_LEN + 1];
 114         char *outptr = NULL;    /* Will hold keyword or desc. */
 115         char *temp = NULL;
 116         char *desc = NULL;
 117         ssize_t retval = count;
 118         unsigned long flags;
 119         unsigned long index = 0;
 120         int charclass = 0;
 121         int received = 0;
 122         int used = 0;
 123         int rejected = 0;
 124         int reset = 0;
 125         int do_characters = !strcmp(attr->attr.name, "characters");
 126         size_t desc_length = 0;
 127         int i;
 128
 129         spk_lock(flags);
 130         while (cp < end) {
 131
 132                 while ((cp < end) && (*cp == ' ' || *cp == '\t'))
 133                         cp++;
 134
 135                 if (cp == end)
 136                         break;
 137                 if ((*cp == '\n') || strchr("dDrR", *cp)) {
 138                         reset = 1;
 139                         break;
 140                 }
 141                 received++;
 142
 143                 linefeed = strchr(cp, '\n');
 144                 if (!linefeed) {
 145                         rejected++;
 146                         break;
 147                 }
 148
 149                 if (!isdigit(*cp)) {
 150                         rejected++;
 151                         cp = linefeed + 1;
 152                         continue;
 153                 }
 154
 155                 index = simple_strtoul(cp, &temp, 10);
 156                 if (index > 255) {
 157                         rejected++;
 158                         cp = linefeed + 1;
 159                         continue;
 160                 }
 161
 162                 while ((temp < linefeed) && (*temp == ' ' || *temp == '\t'))
 163                         temp++;
 164
 165                 desc_length = linefeed - temp;
 166                 if (desc_length > MAX_DESC_LEN) {
 167                         rejected++;
 168                         cp = linefeed + 1;
 169                         continue;
 170                 }
 171                 if (do_characters) {
 172                         desc = kmalloc(desc_length + 1, GFP_ATOMIC);
 173                         if (!desc) {
 174                                 retval = -ENOMEM;
 175                                 reset = 1;      /* just reset on error. */
 176                                 break;
 177                         }
 178                         outptr = desc;
 179                 } else {
 180                         outptr = keyword;
 181                 }
 182
 183                 for (i = 0; i < desc_length; i++)
 184                         outptr[i] = temp[i];
 185                 outptr[desc_length] = '\0';
 186
 187                 if (do_characters) {
 188                         if (characters[index] != default_chars[index])
 189                                 kfree(characters[index]);
 190                         characters[index] = desc;
 191                         used++;
 192                 } else {
 193                         charclass = chartab_get_value(keyword);
 194                         if (charclass == 0) {
 195                                 rejected++;
 196                                 cp = linefeed + 1;
 197                                 continue;
 198                         }
 199                         if (charclass != spk_chartab[index]) {
 200                                 spk_chartab[index] = charclass;
 201                                 used++;
 202                         }
 203                 }
 204                 cp = linefeed + 1;
 205         }
 206
 207         if (reset) {
 208                 if (do_characters)
 209                         reset_default_chars();
 210                 else
 211                         reset_default_chartab();
 212         }
 213
 214         spk_unlock(flags);
 215         report_char_chartab_status(reset, received, used, rejected,
 216                 do_characters);
 217         return retval;
 218 }
 219
 220 /*
 221  * This is called when a user reads the keymap parameter.
 222  */
 223 static ssize_t keymap_show(struct kobject *kobj, struct kobj_attribute *attr,
 224         char *buf)
 225 {
 226         char *cp = buf;
 227         int i;
 228         int n;
 229         int num_keys;
 230         int nstates;
 231         u_char *cp1;
 232         u_char ch;
 233         unsigned long flags;
 234         spk_lock(flags);
 235         cp1 = key_buf + SHIFT_TBL_SIZE;
 236         num_keys = (int)(*cp1);
 237         nstates = (int)cp1[1];
 238         cp += sprintf(cp, "%d, %d, %d,\n", KEY_MAP_VER, num_keys, nstates);
 239         cp1 += 2; /* now pointing at shift states */
 240         /* dump num_keys+1 as first row is shift states + flags,
 241          * each subsequent row is key + states */
 242         for (n = 0; n <= num_keys; n++) {
 243                 for (i = 0; i <= nstates; i++) {
 244                         ch = *cp1++;
 245                         cp += sprintf(cp, "%d,", (int)ch);
 246                         *cp++ = (i < nstates) ? SPACE : '\n';
 247                 }
 248         }
 249         cp += sprintf(cp, "0, %d\n", KEY_MAP_VER);
 250         spk_unlock(flags);
 251         return (int)(cp-buf);
 252 }
 253
 254 /*
 255  * This is called when a user changes the keymap parameter.
 256  */
 257 static ssize_t keymap_store(struct kobject *kobj, struct kobj_attribute *attr,
 258         const char *buf, size_t count)
 259 {
 260         int i;
 261         ssize_t ret = count;
 262         char *in_buff = NULL;
 263         char *cp;
 264         u_char *cp1;
 265         unsigned long flags;
 266
 267         spk_lock(flags);
 268         in_buff = kmalloc(count + 1, GFP_ATOMIC);
 269         if (!in_buff) {
 270                 spk_unlock(flags);
 271                 return -ENOMEM;
 272         }
 273         memcpy(in_buff, buf, count + 1);
 274         if (strchr("dDrR", *in_buff)) {
 275                 set_key_info(key_defaults, key_buf);
 276                 pr_info("keymap set to default values\n");
 277                 kfree(in_buff);
 278                 spk_unlock(flags);
 279                 return count;
 280         }
 281         if (in_buff[count - 1] == '\n')
 282                 in_buff[count - 1] = '\0';
 283         cp = in_buff;
 284         cp1 = (u_char *)in_buff;
 285         for (i = 0; i < 3; i++) {
 286                 cp = s2uchar(cp, cp1);
 287                 cp1++;
 288         }
 289         i = (int)cp1[-2]+1;
 290         i *= (int)cp1[-1]+1;
 291         i += 2; /* 0 and last map ver */
 292         if (cp1[-3] != KEY_MAP_VER || cp1[-1] > 10 ||
 293                         i+SHIFT_TBL_SIZE+4 >= sizeof(key_buf)) {
 294                 pr_warn("i %d %d %d %d\n", i,
 295                                 (int)cp1[-3], (int)cp1[-2], (int)cp1[-1]);
 296                 kfree(in_buff);
 297                 spk_unlock(flags);
 298                 return -EINVAL;
 299         }
 300         while (--i >= 0) {
 301                 cp = s2uchar(cp, cp1);
 302                 cp1++;
 303                 if (!(*cp))
 304                         break;
 305         }
 306         if (i != 0 || cp1[-1] != KEY_MAP_VER || cp1[-2] != 0) {
 307                 ret = -EINVAL;
 308                 pr_warn("end %d %d %d %d\n", i,
 309                                 (int)cp1[-3], (int)cp1[-2], (int)cp1[-1]);
 310         } else {
 311                 if (set_key_info(in_buff, key_buf)) {
 312                         set_key_info(key_defaults, key_buf);
 313                         ret = -EINVAL;
 314                         pr_warn("set key failed\n");
 315                 }
 316         }
 317         kfree(in_buff);
 318         spk_unlock(flags);
 319         return ret;
 320 }
 321
 322 /*
 323  * This is called when a user changes the value of the silent parameter.
 324  */
 325 static ssize_t silent_store(struct kobject *kobj, struct kobj_attribute *attr,
 326         const char *buf, size_t count)
 327 {
 328         int len;
 329         struct vc_data *vc = vc_cons[fg_console].d;
 330         char ch = 0;
 331         char shut;
 332         unsigned long flags;
 333
 334         len = strlen(buf);
 335         if (len > 0 && len < 3) {
 336                 ch = buf[0];
 337                 if (ch == '\n')
 338                         ch = '0';
 339         }
 340         if (ch < '0' || ch > '7') {
 341                 pr_warn("silent value '%c' not in range (0,7)\n", ch);
 342                 return -EINVAL;
 343         }
 344         spk_lock(flags);
 345         if (ch&2) {
 346                 shut = 1;
 347                 do_flush();
 348         } else {
 349                 shut = 0;
 350         }
 351         if (ch&4)
 352                 shut |= 0x40;
 353         if (ch&1)
 354                 spk_shut_up |= shut;
 355         else
 356                 spk_shut_up &= ~shut;
 357         spk_unlock(flags);
 358         return count;
 359 }
 360
 361 /*
 362  * This is called when a user reads the synth setting.
 363  */
 364 static ssize_t synth_show(struct kobject *kobj, struct kobj_attribute *attr,
 365         char *buf)
 366 {
 367         int rv;
 368
 369         if (synth == NULL)
 370                 rv = sprintf(buf, "%s\n", "none");
 371         else
 372                 rv = sprintf(buf, "%s\n", synth->name);
 373         return rv;
 374 }
 375
 376 /*
 377  * This is called when a user requests to change synthesizers.
 378  */
 379 static ssize_t synth_store(struct kobject *kobj, struct kobj_attribute *attr,
 380         const char *buf, size_t count)
 381 {
 382         int len;
 383         char new_synth_name[10];
 384
 385         len = strlen(buf);
 386         if (len < 2 || len > 9)
 387                 return -EINVAL;
 388         strncpy(new_synth_name, buf, len);
 389         if (new_synth_name[len - 1] == '\n')
 390                 len--;
 391         new_synth_name[len] = '\0';
 392         strlwr(new_synth_name);
 393         if ((synth != NULL) && (!strcmp(new_synth_name, synth->name))) {
 394                 pr_warn("%s already in use\n", new_synth_name);
 395         } else if (synth_init(new_synth_name) != 0) {
 396                 pr_warn("failed to init synth %s\n", new_synth_name);
 397                 return -ENODEV;
 398         }
 399         return count;
 400 }
 401
 402 /*
 403  * This is called when text is sent to the synth via the synth_direct file.
 404  */
 405 static ssize_t synth_direct_store(struct kobject *kobj,
 406         struct kobj_attribute *attr, const char *buf, size_t count)
 407 {
 408         u_char tmp[256];
 409         int len;
 410         int bytes;
 411         const char *ptr = buf;
 412
 413         if (!synth)
 414                 return -EPERM;
 415
 416         len = strlen(buf);
 417         while (len > 0) {
 418                 bytes = min_t(size_t, len, 250);
 419                 strncpy(tmp, ptr, bytes);
 420                 tmp[bytes] = '\0';
 421                 xlate(tmp);
 422                 synth_printf("%s", tmp);
 423                 ptr += bytes;
 424                 len -= bytes;
 425         }
 426         return count;
 427 }
 428
 429 /*
 430  * This function is called when a user reads the version.
 431  */
 432 static ssize_t version_show(struct kobject *kobj, struct kobj_attribute *attr,
 433         char *buf)
 434 {
 435         char *cp;
 436
 437         cp = buf;
 438         cp += sprintf(cp, "Speakup version %s\n", SPEAKUP_VERSION);
 439         if (synth)
 440                 cp += sprintf(cp, "%s synthesizer driver version %s\n",
 441                 synth->name, synth->version);
 442         return cp - buf;
 443 }
 444
 445 /*
 446  * This is called when a user reads the punctuation settings.
 447  */
 448 static ssize_t punc_show(struct kobject *kobj, struct kobj_attribute *attr,
 449         char *buf)
 450 {
 451         int i;
 452         char *cp = buf;
 453         struct st_var_header *p_header;
 454         struct punc_var_t *var;
 455         struct st_bits_data *pb;
 456         short mask;
 457         unsigned long flags;
 458
 459         p_header = var_header_by_name(attr->attr.name);
 460         if (p_header == NULL) {
 461                 pr_warn("p_header is null, attr->attr.name is %s\n",
 462                         attr->attr.name);
 463                 return -EINVAL;
 464         }
 465
 466         var = get_punc_var(p_header->var_id);
 467         if (var == NULL) {
 468                 pr_warn("var is null, p_header->var_id is %i\n",
 469                                 p_header->var_id);
 470                 return -EINVAL;
 471         }
 472
 473         spk_lock(flags);
 474         pb = (struct st_bits_data *) &punc_info[var->value];
 475         mask = pb->mask;
 476         for (i = 33; i < 128; i++) {
 477                 if (!(spk_chartab[i]&mask))
 478                         continue;
 479                 *cp++ = (char)i;
 480         }
 481         spk_unlock(flags);
 482         return cp-buf;
 483 }
 484
 485 /*
 486  * This is called when a user changes the punctuation settings.
 487  */
 488 static ssize_t punc_store(struct kobject *kobj, struct kobj_attribute *attr,
 489                          const char *buf, size_t count)
 490 {
 491         int x;
 492         struct st_var_header *p_header;
 493         struct punc_var_t *var;
 494         char punc_buf[100];
 495         unsigned long flags;
 496
 497         x = strlen(buf);
 498         if (x < 1 || x > 99)
 499                 return -EINVAL;
 500
 501         p_header = var_header_by_name(attr->attr.name);
 502         if (p_header == NULL) {
 503                 pr_warn("p_header is null, attr->attr.name is %s\n",
 504                         attr->attr.name);
 505                 return -EINVAL;
 506         }
 507
 508         var = get_punc_var(p_header->var_id);
 509         if (var == NULL) {
 510                 pr_warn("var is null, p_header->var_id is %i\n",
 511                                 p_header->var_id);
 512                 return -EINVAL;
 513         }
 514
 515         strncpy(punc_buf, buf, x);
 516
 517         while (x && punc_buf[x - 1] == '\n')
 518                 x--;
 519         punc_buf[x] = '\0';
 520
 521         spk_lock(flags);
 522
 523         if (*punc_buf == 'd' || *punc_buf == 'r')
 524                 x = set_mask_bits(0, var->value, 3);
 525         else
 526                 x = set_mask_bits(punc_buf, var->value, 3);
 527
 528         spk_unlock(flags);
 529         return count;
 530 }
 531
 532 /*
 533  * This function is called when a user reads one of the variable parameters.
 534  */
 535 ssize_t spk_var_show(struct kobject *kobj, struct kobj_attribute *attr,
 536         char *buf)
 537 {
 538         int rv = 0;
 539         struct st_var_header *param;
 540         struct var_t *var;
 541                 char *cp1;
 542         char *cp;
 543         char ch;
 544         unsigned long flags;
 545
 546         param = var_header_by_name(attr->attr.name);
 547         if (param == NULL)
 548                 return -EINVAL;
 549
 550         spk_lock(flags);
 551         var = (struct var_t *) param->data;
 552         switch (param->var_type) {
 553         case VAR_NUM:
 554         case VAR_TIME:
 555                 if (var)
 556                         rv = sprintf(buf, "%i\n", var->u.n.value);
 557                 else
 558                         rv = sprintf(buf, "0\n");
 559                 break;
 560         case VAR_STRING:
 561                 if (var) {
 562                         cp1 = buf;
 563                         *cp1++ = '"';
 564                         for (cp = (char *)param->p_val; (ch = *cp); cp++) {
 565                                 if (ch >= ' ' && ch < '~')
 566                                         *cp1++ = ch;
 567                                 else
 568                                         cp1 += sprintf(cp1, "\\""x%02x", ch);
 569                         }
 570                         *cp1++ = '"';
 571                         *cp1++ = '\n';
 572                         *cp1 = '\0';
 573                         rv = cp1-buf;
 574                 } else {
 575                         rv = sprintf(buf, "\"\"\n");
 576                 }
 577                 break;
 578         default:
 579                 rv = sprintf(buf, "Bad parameter  %s, type %i\n",
 580                         param->name, param->var_type);
 581                 break;
 582         }
 583         spk_unlock(flags);
 584         return rv;
 585 }
 586 EXPORT_SYMBOL_GPL(spk_var_show);
 587
 588 /*
 589  * This function is called when a user echos a value to one of the
 590  * variable parameters.
 591  */
 592 ssize_t spk_var_store(struct kobject *kobj, struct kobj_attribute *attr,
 593                          const char *buf, size_t count)
 594 {
 595         struct st_var_header *param;
 596         int ret;
 597         int len;
 598         char *cp;
 599         struct var_t *var_data;
 600         int value;
 601         unsigned long flags;
 602
 603         param = var_header_by_name(attr->attr.name);
 604         if (param == NULL)
 605                 return -EINVAL;
 606         if (param->data == NULL)
 607                 return 0;
 608         ret = 0;
 609         cp = xlate((char *) buf);
 610
 611         spk_lock(flags);
 612         switch (param->var_type) {
 613         case VAR_NUM:
 614         case VAR_TIME:
 615                 if (*cp == 'd' || *cp == 'r' || *cp == '\0')
 616                         len = E_DEFAULT;
 617                 else if (*cp == '+' || *cp == '-')
 618                         len = E_INC;
 619                 else
 620                         len = E_SET;
 621                 speakup_s2i(cp, &value);
 622                 ret = set_num_var(value, param, len);
 623                 if (ret == E_RANGE) {
 624                         var_data = param->data;
 625                         pr_warn("value for %s out of range, expect %d to %d\n",
 626                                 attr->attr.name,
 627                                 var_data->u.n.low, var_data->u.n.high);
 628                 }
 629                 break;
 630         case VAR_STRING:
 631                 len = strlen(buf);
 632                 if ((len >= 1) && (buf[len - 1] == '\n'))
 633                         --len;
 634                 if ((len >= 2) && (buf[0] == '"') && (buf[len - 1] == '"')) {
 635                         ++buf;
 636                         len -= 2;
 637                 }
 638                 cp = (char *) buf;
 639                 cp[len] = '\0';
 640                 ret = set_string_var(buf, param, len);
 641                 if (ret == E_TOOLONG)
 642                         pr_warn("value too long for %s\n",
 643                                         attr->attr.name);
 644                 break;
 645         default:
 646                 pr_warn("%s unknown type %d\n",
 647                         param->name, (int)param->var_type);
 648         break;
 649         }
 650         /*
 651          * If voice was just changed, we might need to reset our default
 652          * pitch and volume.
 653          */
 654         if (strcmp(attr->attr.name, "voice") == 0) {
 655                 if (synth && synth->default_pitch) {
 656                         param = var_header_by_name("pitch");
 657                         if (param)  {
 658                                 set_num_var(synth->default_pitch[value], param,
 659                                         E_NEW_DEFAULT);
 660                                 set_num_var(0, param, E_DEFAULT);
 661                         }
 662                 }
 663                 if (synth && synth->default_vol) {
 664                         param = var_header_by_name("vol");
 665                         if (param)  {
 666                                 set_num_var(synth->default_vol[value], param,
 667                                         E_NEW_DEFAULT);
 668                                 set_num_var(0, param, E_DEFAULT);
 669                         }
 670                 }
 671         }
 672         spk_unlock(flags);
 673
 674         if (ret == SET_DEFAULT)
 675                 pr_info("%s reset to default value\n", attr->attr.name);
 676         return count;
 677 }
 678 EXPORT_SYMBOL_GPL(spk_var_store);
 679
 680 /*
 681  * Functions for reading and writing lists of i18n messages.  Incomplete.
 682  */
 683
 684 static ssize_t message_show_helper(char *buf, enum msg_index_t first,
 685         enum msg_index_t last)
 686 {
 687         size_t bufsize = PAGE_SIZE;
 688         char *buf_pointer = buf;
 689         int printed;
 690         enum msg_index_t cursor;
 691         int index = 0;
 692         *buf_pointer = '\0'; /* buf_pointer always looking at a NUL byte. */
 693
 694         for (cursor = first; cursor <= last; cursor++, index++) {
 695                 if (bufsize <= 1)
 696                         break;
 697                 printed = scnprintf(buf_pointer, bufsize, "%d\t%s\n",
 698                         index, msg_get(cursor));
 699                 buf_pointer += printed;
 700                 bufsize -= printed;
 701         }
 702
 703         return buf_pointer - buf;
 704 }
 705
 706 static void report_msg_status(int reset, int received, int used,
 707         int rejected, char *groupname)
 708 {
 709         int len;
 710         char buf[160];
 711
 712         if (reset) {
 713                 pr_info("i18n messages from group %s reset to defaults\n",
 714                         groupname);
 715         } else if (received) {
 716                 len = snprintf(buf, sizeof(buf),
 717                                " updated %d of %d i18n messages from group %s\n",
 718                                        used, received, groupname);
 719                 if (rejected)
 720                         snprintf(buf + (len - 1), sizeof(buf) - (len - 1),
 721                                  " with %d reject%s\n",
 722                                  rejected, rejected > 1 ? "s" : "");
 723                 printk(buf);
 724         }
 725 }
 726
 727 static ssize_t message_store_helper(const char *buf, size_t count,
 728         struct msg_group_t *group)
 729 {
 730         char *cp = (char *) buf;
 731         char *end = cp + count;
 732         char *linefeed = NULL;
 733         char *temp = NULL;
 734         ssize_t msg_stored = 0;
 735         ssize_t retval = count;
 736         size_t desc_length = 0;
 737         unsigned long index = 0;
 738         int received = 0;
 739         int used = 0;
 740         int rejected = 0;
 741         int reset = 0;
 742         enum msg_index_t firstmessage = group->start;
 743         enum msg_index_t lastmessage = group->end;
 744         enum msg_index_t curmessage;
 745
 746         while (cp < end) {
 747
 748                 while ((cp < end) && (*cp == ' ' || *cp == '\t'))
 749                         cp++;
 750
 751                 if (cp == end)
 752                         break;
 753                 if (strchr("dDrR", *cp)) {
 754                         reset = 1;
 755                         break;
 756                 }
 757                 received++;
 758
 759                 linefeed = strchr(cp, '\n');
 760                 if (!linefeed) {
 761                         rejected++;
 762                         break;
 763                 }
 764
 765                 if (!isdigit(*cp)) {
 766                         rejected++;
 767                         cp = linefeed + 1;
 768                         continue;
 769                 }
 770
 771                 index = simple_strtoul(cp, &temp, 10);
 772
 773                 while ((temp < linefeed) && (*temp == ' ' || *temp == '\t'))
 774                         temp++;
 775
 776                 desc_length = linefeed - temp;
 777                 curmessage = firstmessage + index;
 778
 779                 /*
 780                  * Note the check (curmessage < firstmessage).  It is not
 781                  * redundant.  Suppose that the user gave us an index
 782                  * equal to ULONG_MAX - 1.  If firstmessage > 1, then
 783                  * firstmessage + index < firstmessage!
 784                  */
 785
 786                 if ((curmessage < firstmessage) || (curmessage > lastmessage)) {
 787                         rejected++;
 788                         cp = linefeed + 1;
 789                         continue;
 790                 }
 791
 792                 msg_stored = msg_set(curmessage, temp, desc_length);
 793                 if (msg_stored < 0) {
 794                         retval = msg_stored;
 795                         if (msg_stored == -ENOMEM)
 796                                 reset = 1;
 797                         break;
 798                 } else {
 799                         used++;
 800                 }
 801
 802                 cp = linefeed + 1;
 803         }
 804
 805         if (reset)
 806                 reset_msg_group(group);
 807
 808         report_msg_status(reset, received, used, rejected, group->name);
 809         return retval;
 810 }
 811
 812 static ssize_t message_show(struct kobject *kobj,
 813         struct kobj_attribute *attr, char *buf)
 814 {
 815         ssize_t retval = 0;
 816         struct msg_group_t *group = find_msg_group(attr->attr.name);
 817         unsigned long flags;
 818
 819         BUG_ON(!group);
 820         spk_lock(flags);
 821         retval = message_show_helper(buf, group->start, group->end);
 822         spk_unlock(flags);
 823         return retval;
 824 }
 825
 826 static ssize_t message_store(struct kobject *kobj, struct kobj_attribute *attr,
 827         const char *buf, size_t count)
 828 {
 829         ssize_t retval = 0;
 830         struct msg_group_t *group = find_msg_group(attr->attr.name);
 831
 832         BUG_ON(!group);
 833         retval = message_store_helper(buf, count, group);
 834         return retval;
 835 }
 836
 837 /*
 838  * Declare the attributes.
 839  */
 840 static struct kobj_attribute keymap_attribute =
 841         __ATTR(keymap, ROOT_W, keymap_show, keymap_store);
 842 static struct kobj_attribute silent_attribute =
 843         __ATTR(silent, USER_W, NULL, silent_store);
 844 static struct kobj_attribute synth_attribute =
 845         __ATTR(synth, USER_RW, synth_show, synth_store);
 846 static struct kobj_attribute synth_direct_attribute =
 847         __ATTR(synth_direct, USER_W, NULL, synth_direct_store);
 848 static struct kobj_attribute version_attribute =
 849         __ATTR_RO(version);
 850
 851 static struct kobj_attribute delimiters_attribute =
 852         __ATTR(delimiters, USER_RW, punc_show, punc_store);
 853 static struct kobj_attribute ex_num_attribute =
 854         __ATTR(ex_num, USER_RW, punc_show, punc_store);
 855 static struct kobj_attribute punc_all_attribute =
 856         __ATTR(punc_all, USER_RW, punc_show, punc_store);
 857 static struct kobj_attribute punc_most_attribute =
 858         __ATTR(punc_most, USER_RW, punc_show, punc_store);
 859 static struct kobj_attribute punc_some_attribute =
 860         __ATTR(punc_some, USER_RW, punc_show, punc_store);
 861 static struct kobj_attribute repeats_attribute =
 862         __ATTR(repeats, USER_RW, punc_show, punc_store);
 863
 864 static struct kobj_attribute attrib_bleep_attribute =
 865         __ATTR(attrib_bleep, USER_RW, spk_var_show, spk_var_store);
 866 static struct kobj_attribute bell_pos_attribute =
 867         __ATTR(bell_pos, USER_RW, spk_var_show, spk_var_store);
 868 static struct kobj_attribute bleep_time_attribute =
 869         __ATTR(bleep_time, USER_RW, spk_var_show, spk_var_store);
 870 static struct kobj_attribute bleeps_attribute =
 871         __ATTR(bleeps, USER_RW, spk_var_show, spk_var_store);
 872 static struct kobj_attribute cursor_time_attribute =
 873         __ATTR(cursor_time, USER_RW, spk_var_show, spk_var_store);
 874 static struct kobj_attribute key_echo_attribute =
 875         __ATTR(key_echo, USER_RW, spk_var_show, spk_var_store);
 876 static struct kobj_attribute no_interrupt_attribute =
 877         __ATTR(no_interrupt, USER_RW, spk_var_show, spk_var_store);
 878 static struct kobj_attribute punc_level_attribute =
 879         __ATTR(punc_level, USER_RW, spk_var_show, spk_var_store);
 880 static struct kobj_attribute reading_punc_attribute =
 881         __ATTR(reading_punc, USER_RW, spk_var_show, spk_var_store);
 882 static struct kobj_attribute say_control_attribute =
 883         __ATTR(say_control, USER_RW, spk_var_show, spk_var_store);
 884 static struct kobj_attribute say_word_ctl_attribute =
 885         __ATTR(say_word_ctl, USER_RW, spk_var_show, spk_var_store);
 886 static struct kobj_attribute spell_delay_attribute =
 887         __ATTR(spell_delay, USER_RW, spk_var_show, spk_var_store);
 888
 889 /*
 890  * These attributes are i18n related.
 891  */
 892 static struct kobj_attribute announcements_attribute =
 893         __ATTR(announcements, USER_RW, message_show, message_store);
 894 static struct kobj_attribute characters_attribute =
 895         __ATTR(characters, USER_RW, chars_chartab_show, chars_chartab_store);
 896 static struct kobj_attribute chartab_attribute =
 897         __ATTR(chartab, USER_RW, chars_chartab_show, chars_chartab_store);
 898 static struct kobj_attribute ctl_keys_attribute =
 899         __ATTR(ctl_keys, USER_RW, message_show, message_store);
 900 static struct kobj_attribute colors_attribute =
 901         __ATTR(colors, USER_RW, message_show, message_store);
 902 static struct kobj_attribute formatted_attribute =
 903         __ATTR(formatted, USER_RW, message_show, message_store);
 904 static struct kobj_attribute function_names_attribute =
 905         __ATTR(function_names, USER_RW, message_show, message_store);
 906 static struct kobj_attribute key_names_attribute =
 907         __ATTR(key_names, USER_RW, message_show, message_store);
 908 static struct kobj_attribute states_attribute =
 909         __ATTR(states, USER_RW, message_show, message_store);
 910
 911 /*
 912  * Create groups of attributes so that we can create and destroy them all
 913  * at once.
 914  */
 915 static struct attribute *main_attrs[] = {
 916         &keymap_attribute.attr,
 917         &silent_attribute.attr,
 918         &synth_attribute.attr,
 919         &synth_direct_attribute.attr,
 920         &version_attribute.attr,
 921         &delimiters_attribute.attr,
 922         &ex_num_attribute.attr,
 923         &punc_all_attribute.attr,
 924         &punc_most_attribute.attr,
 925         &punc_some_attribute.attr,
 926         &repeats_attribute.attr,
 927         &attrib_bleep_attribute.attr,
 928         &bell_pos_attribute.attr,
 929         &bleep_time_attribute.attr,
 930         &bleeps_attribute.attr,
 931         &cursor_time_attribute.attr,
 932         &key_echo_attribute.attr,
 933         &no_interrupt_attribute.attr,
 934         &punc_level_attribute.attr,
 935         &reading_punc_attribute.attr,
 936         &say_control_attribute.attr,
 937         &say_word_ctl_attribute.attr,
 938         &spell_delay_attribute.attr,
 939         NULL,
 940 };
 941
 942 static struct attribute *i18n_attrs[] = {
 943         &announcements_attribute.attr,
 944         &characters_attribute.attr,
 945         &chartab_attribute.attr,
 946         &ctl_keys_attribute.attr,
 947         &colors_attribute.attr,
 948         &formatted_attribute.attr,
 949         &function_names_attribute.attr,
 950         &key_names_attribute.attr,
 951         &states_attribute.attr,
 952         NULL,
 953 };
 954
 955 /*
 956  * An unnamed attribute group will put all of the attributes directly in
 957  * the kobject directory.  If we specify a name, a subdirectory will be
 958  * created for the attributes with the directory being the name of the
 959  * attribute group.
 960  */
 961 static struct attribute_group main_attr_group = {
 962         .attrs = main_attrs,
 963 };
 964
 965 static struct attribute_group i18n_attr_group = {
 966         .attrs = i18n_attrs,
 967         .name = "i18n",
 968 };
 969
 970 static struct kobject *accessibility_kobj;
 971 struct kobject *speakup_kobj;
 972
 973 int speakup_kobj_init(void)
 974 {
 975         int retval;
 976
 977         /*
 978          * Create a simple kobject with the name of "accessibility",
 979          * located under /sys/
 980          *
 981          * As this is a simple directory, no uevent will be sent to
 982          * userspace.  That is why this function should not be used for
 983          * any type of dynamic kobjects, where the name and number are
 984          * not known ahead of time.
 985          */
 986         accessibility_kobj = kobject_create_and_add("accessibility", NULL);
 987         if (!accessibility_kobj) {
 988                 retval = -ENOMEM;
 989                 goto out;
 990         }
 991
 992         speakup_kobj = kobject_create_and_add("speakup", accessibility_kobj);
 993         if (!speakup_kobj) {
 994                 retval = -ENOMEM;
 995                 goto err_acc;
 996         }
 997
 998         /* Create the files associated with this kobject */
 999         retval = sysfs_create_group(speakup_kobj, &main_attr_group);
1000         if (retval)
1001                 goto err_speakup;
1002
1003         retval = sysfs_create_group(speakup_kobj, &i18n_attr_group);
1004         if (retval)
1005                 goto err_group;
1006
1007         goto out;
1008
1009 err_group:
1010         sysfs_remove_group(speakup_kobj, &main_attr_group);
1011 err_speakup:
1012         kobject_put(speakup_kobj);
1013 err_acc:
1014         kobject_put(accessibility_kobj);
1015 out:
1016         return retval;
1017 }
1018
1019 void speakup_kobj_exit(void)
1020 {
1021         sysfs_remove_group(speakup_kobj, &i18n_attr_group);
1022         sysfs_remove_group(speakup_kobj, &main_attr_group);
1023         kobject_put(speakup_kobj);
1024         kobject_put(accessibility_kobj);
1025 }