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
 415         if (!synth)
 416                 return -EPERM;
 417
 418         len = strlen(buf);
 419         while (len > 0) {
 420                 bytes = min_t(size_t, len, 250);
 421                 strncpy(tmp, ptr, bytes);
 422                 tmp[bytes] = '\0';
 423                 string_unescape_any_inplace(tmp);
 424                 synth_printf("%s", tmp);
 425                 ptr += bytes;
 426                 len -= bytes;
 427         }
 428         return count;
 429 }
 430
 431 /*
 432  * This function is called when a user reads the version.
 433  */
 434 static ssize_t version_show(struct kobject *kobj, struct kobj_attribute *attr,
 435         char *buf)
 436 {
 437         char *cp;
 438
 439         cp = buf;
 440         cp += sprintf(cp, "Speakup version %s\n", SPEAKUP_VERSION);
 441         if (synth)
 442                 cp += sprintf(cp, "%s synthesizer driver version %s\n",
 443                 synth->name, synth->version);
 444         return cp - buf;
 445 }
 446
 447 /*
 448  * This is called when a user reads the punctuation settings.
 449  */
 450 static ssize_t punc_show(struct kobject *kobj, struct kobj_attribute *attr,
 451         char *buf)
 452 {
 453         int i;
 454         char *cp = buf;
 455         struct st_var_header *p_header;
 456         struct punc_var_t *var;
 457         struct st_bits_data *pb;
 458         short mask;
 459         unsigned long flags;
 460
 461         p_header = spk_var_header_by_name(attr->attr.name);
 462         if (!p_header) {
 463                 pr_warn("p_header is null, attr->attr.name is %s\n",
 464                         attr->attr.name);
 465                 return -EINVAL;
 466         }
 467
 468         var = spk_get_punc_var(p_header->var_id);
 469         if (!var) {
 470                 pr_warn("var is null, p_header->var_id is %i\n",
 471                                 p_header->var_id);
 472                 return -EINVAL;
 473         }
 474
 475         spin_lock_irqsave(&speakup_info.spinlock, flags);
 476         pb = (struct st_bits_data *) &spk_punc_info[var->value];
 477         mask = pb->mask;
 478         for (i = 33; i < 128; i++) {
 479                 if (!(spk_chartab[i]&mask))
 480                         continue;
 481                 *cp++ = (char)i;
 482         }
 483         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 484         return cp-buf;
 485 }
 486
 487 /*
 488  * This is called when a user changes the punctuation settings.
 489  */
 490 static ssize_t punc_store(struct kobject *kobj, struct kobj_attribute *attr,
 491                          const char *buf, size_t count)
 492 {
 493         int x;
 494         struct st_var_header *p_header;
 495         struct punc_var_t *var;
 496         char punc_buf[100];
 497         unsigned long flags;
 498
 499         x = strlen(buf);
 500         if (x < 1 || x > 99)
 501                 return -EINVAL;
 502
 503         p_header = spk_var_header_by_name(attr->attr.name);
 504         if (!p_header) {
 505                 pr_warn("p_header is null, attr->attr.name is %s\n",
 506                         attr->attr.name);
 507                 return -EINVAL;
 508         }
 509
 510         var = spk_get_punc_var(p_header->var_id);
 511         if (!var) {
 512                 pr_warn("var is null, p_header->var_id is %i\n",
 513                                 p_header->var_id);
 514                 return -EINVAL;
 515         }
 516
 517         strncpy(punc_buf, buf, x);
 518
 519         while (x && punc_buf[x - 1] == '\n')
 520                 x--;
 521         punc_buf[x] = '\0';
 522
 523         spin_lock_irqsave(&speakup_info.spinlock, flags);
 524
 525         if (*punc_buf == 'd' || *punc_buf == 'r')
 526                 x = spk_set_mask_bits(NULL, var->value, 3);
 527         else
 528                 x = spk_set_mask_bits(punc_buf, var->value, 3);
 529
 530         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 531         return count;
 532 }
 533
 534 /*
 535  * This function is called when a user reads one of the variable parameters.
 536  */
 537 ssize_t spk_var_show(struct kobject *kobj, struct kobj_attribute *attr,
 538         char *buf)
 539 {
 540         int rv = 0;
 541         struct st_var_header *param;
 542         struct var_t *var;
 543                 char *cp1;
 544         char *cp;
 545         char ch;
 546         unsigned long flags;
 547
 548         param = spk_var_header_by_name(attr->attr.name);
 549         if (!param)
 550                 return -EINVAL;
 551
 552         spin_lock_irqsave(&speakup_info.spinlock, flags);
 553         var = (struct var_t *) param->data;
 554         switch (param->var_type) {
 555         case VAR_NUM:
 556         case VAR_TIME:
 557                 if (var)
 558                         rv = sprintf(buf, "%i\n", var->u.n.value);
 559                 else
 560                         rv = sprintf(buf, "0\n");
 561                 break;
 562         case VAR_STRING:
 563                 if (var) {
 564                         cp1 = buf;
 565                         *cp1++ = '"';
 566                         for (cp = (char *)param->p_val; (ch = *cp); cp++) {
 567                                 if (ch >= ' ' && ch < '~')
 568                                         *cp1++ = ch;
 569                                 else
 570                                         cp1 += sprintf(cp1, "\\x%02x", ch);
 571                         }
 572                         *cp1++ = '"';
 573                         *cp1++ = '\n';
 574                         *cp1 = '\0';
 575                         rv = cp1-buf;
 576                 } else {
 577                         rv = sprintf(buf, "\"\"\n");
 578                 }
 579                 break;
 580         default:
 581                 rv = sprintf(buf, "Bad parameter  %s, type %i\n",
 582                         param->name, param->var_type);
 583                 break;
 584         }
 585         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 586         return rv;
 587 }
 588 EXPORT_SYMBOL_GPL(spk_var_show);
 589
 590 /*
 591  * Used to reset either default_pitch or default_vol.
 592  */
 593 static inline void spk_reset_default_value(char *header_name,
 594                                         int *synth_default_value, int idx)
 595 {
 596         struct st_var_header *param;
 597
 598         if (synth && synth_default_value) {
 599                 param = spk_var_header_by_name(header_name);
 600                 if (param)  {
 601                         spk_set_num_var(synth_default_value[idx],
 602                                         param, E_NEW_DEFAULT);
 603                         spk_set_num_var(0, param, E_DEFAULT);
 604                         pr_info("%s reset to default value\n", param->name);
 605                 }
 606         }
 607 }
 608
 609 /*
 610  * This function is called when a user echos a value to one of the
 611  * variable parameters.
 612  */
 613 ssize_t spk_var_store(struct kobject *kobj, struct kobj_attribute *attr,
 614                          const char *buf, size_t count)
 615 {
 616         struct st_var_header *param;
 617         int ret;
 618         int len;
 619         char *cp;
 620         struct var_t *var_data;
 621         long value;
 622         unsigned long flags;
 623
 624         param = spk_var_header_by_name(attr->attr.name);
 625         if (!param)
 626                 return -EINVAL;
 627         if (!param->data)
 628                 return 0;
 629         ret = 0;
 630         cp = (char *)buf;
 631         string_unescape_any_inplace(cp);
 632
 633         spin_lock_irqsave(&speakup_info.spinlock, flags);
 634         switch (param->var_type) {
 635         case VAR_NUM:
 636         case VAR_TIME:
 637                 if (*cp == 'd' || *cp == 'r' || *cp == '\0')
 638                         len = E_DEFAULT;
 639                 else if (*cp == '+' || *cp == '-')
 640                         len = E_INC;
 641                 else
 642                         len = E_SET;
 643                 if (kstrtol(cp, 10, &value) == 0)
 644                         ret = spk_set_num_var(value, param, len);
 645                 else
 646                         pr_warn("overflow or parsing error has occurred");
 647                 if (ret == -ERANGE) {
 648                         var_data = param->data;
 649                         pr_warn("value for %s out of range, expect %d to %d\n",
 650                                 param->name,
 651                                 var_data->u.n.low, var_data->u.n.high);
 652                 }
 653
 654                /*
 655                 * If voice was just changed, we might need to reset our default
 656                 * pitch and volume.
 657                 */
 658                 if (param->var_id == VOICE && synth &&
 659                     (ret == 0 || ret == -ERESTART)) {
 660                         var_data = param->data;
 661                         value = var_data->u.n.value;
 662                         spk_reset_default_value("pitch", synth->default_pitch,
 663                                 value);
 664                         spk_reset_default_value("vol", synth->default_vol,
 665                                 value);
 666                 }
 667                 break;
 668         case VAR_STRING:
 669                 len = strlen(cp);
 670                 if ((len >= 1) && (cp[len - 1] == '\n'))
 671                         --len;
 672                 if ((len >= 2) && (cp[0] == '"') && (cp[len - 1] == '"')) {
 673                         ++cp;
 674                         len -= 2;
 675                 }
 676                 cp[len] = '\0';
 677                 ret = spk_set_string_var(cp, param, len);
 678                 if (ret == -E2BIG)
 679                         pr_warn("value too long for %s\n",
 680                                         param->name);
 681                 break;
 682         default:
 683                 pr_warn("%s unknown type %d\n",
 684                         param->name, (int)param->var_type);
 685         break;
 686         }
 687         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 688
 689         if (ret == -ERESTART)
 690                 pr_info("%s reset to default value\n", param->name);
 691         return count;
 692 }
 693 EXPORT_SYMBOL_GPL(spk_var_store);
 694
 695 /*
 696  * Functions for reading and writing lists of i18n messages.  Incomplete.
 697  */
 698
 699 static ssize_t message_show_helper(char *buf, enum msg_index_t first,
 700         enum msg_index_t last)
 701 {
 702         size_t bufsize = PAGE_SIZE;
 703         char *buf_pointer = buf;
 704         int printed;
 705         enum msg_index_t cursor;
 706         int index = 0;
 707         *buf_pointer = '\0'; /* buf_pointer always looking at a NUL byte. */
 708
 709         for (cursor = first; cursor <= last; cursor++, index++) {
 710                 if (bufsize <= 1)
 711                         break;
 712                 printed = scnprintf(buf_pointer, bufsize, "%d\t%s\n",
 713                         index, spk_msg_get(cursor));
 714                 buf_pointer += printed;
 715                 bufsize -= printed;
 716         }
 717
 718         return buf_pointer - buf;
 719 }
 720
 721 static void report_msg_status(int reset, int received, int used,
 722         int rejected, char *groupname)
 723 {
 724         int len;
 725         char buf[160];
 726
 727         if (reset) {
 728                 pr_info("i18n messages from group %s reset to defaults\n",
 729                         groupname);
 730         } else if (received) {
 731                 len = snprintf(buf, sizeof(buf),
 732                                " updated %d of %d i18n messages from group %s\n",
 733                                        used, received, groupname);
 734                 if (rejected)
 735                         snprintf(buf + (len - 1), sizeof(buf) - (len - 1),
 736                                  " with %d reject%s\n",
 737                                  rejected, rejected > 1 ? "s" : "");
 738                 printk(buf);
 739         }
 740 }
 741
 742 static ssize_t message_store_helper(const char *buf, size_t count,
 743         struct msg_group_t *group)
 744 {
 745         char *cp = (char *) buf;
 746         char *end = cp + count;
 747         char *linefeed = NULL;
 748         char *temp = NULL;
 749         ssize_t msg_stored = 0;
 750         ssize_t retval = count;
 751         size_t desc_length = 0;
 752         unsigned long index = 0;
 753         int received = 0;
 754         int used = 0;
 755         int rejected = 0;
 756         int reset = 0;
 757         enum msg_index_t firstmessage = group->start;
 758         enum msg_index_t lastmessage = group->end;
 759         enum msg_index_t curmessage;
 760
 761         while (cp < end) {
 762
 763                 while ((cp < end) && (*cp == ' ' || *cp == '\t'))
 764                         cp++;
 765
 766                 if (cp == end)
 767                         break;
 768                 if (strchr("dDrR", *cp)) {
 769                         reset = 1;
 770                         break;
 771                 }
 772                 received++;
 773
 774                 linefeed = strchr(cp, '\n');
 775                 if (!linefeed) {
 776                         rejected++;
 777                         break;
 778                 }
 779
 780                 if (!isdigit(*cp)) {
 781                         rejected++;
 782                         cp = linefeed + 1;
 783                         continue;
 784                 }
 785
 786                 index = simple_strtoul(cp, &temp, 10);
 787
 788                 while ((temp < linefeed) && (*temp == ' ' || *temp == '\t'))
 789                         temp++;
 790
 791                 desc_length = linefeed - temp;
 792                 curmessage = firstmessage + index;
 793
 794                 /*
 795                  * Note the check (curmessage < firstmessage).  It is not
 796                  * redundant.  Suppose that the user gave us an index
 797                  * equal to ULONG_MAX - 1.  If firstmessage > 1, then
 798                  * firstmessage + index < firstmessage!
 799                  */
 800
 801                 if ((curmessage < firstmessage) || (curmessage > lastmessage)) {
 802                         rejected++;
 803                         cp = linefeed + 1;
 804                         continue;
 805                 }
 806
 807                 msg_stored = spk_msg_set(curmessage, temp, desc_length);
 808                 if (msg_stored < 0) {
 809                         retval = msg_stored;
 810                         if (msg_stored == -ENOMEM)
 811                                 reset = 1;
 812                         break;
 813                 }
 814
 815                 used++;
 816
 817                 cp = linefeed + 1;
 818         }
 819
 820         if (reset)
 821                 spk_reset_msg_group(group);
 822
 823         report_msg_status(reset, received, used, rejected, group->name);
 824         return retval;
 825 }
 826
 827 static ssize_t message_show(struct kobject *kobj,
 828         struct kobj_attribute *attr, char *buf)
 829 {
 830         ssize_t retval = 0;
 831         struct msg_group_t *group = spk_find_msg_group(attr->attr.name);
 832         unsigned long flags;
 833
 834         BUG_ON(!group);
 835         spin_lock_irqsave(&speakup_info.spinlock, flags);
 836         retval = message_show_helper(buf, group->start, group->end);
 837         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 838         return retval;
 839 }
 840
 841 static ssize_t message_store(struct kobject *kobj, struct kobj_attribute *attr,
 842         const char *buf, size_t count)
 843 {
 844         struct msg_group_t *group = spk_find_msg_group(attr->attr.name);
 845
 846         BUG_ON(!group);
 847         return message_store_helper(buf, count, group);
 848 }
 849
 850 /*
 851  * Declare the attributes.
 852  */
 853 static struct kobj_attribute keymap_attribute =
 854         __ATTR_RW(keymap);
 855 static struct kobj_attribute silent_attribute =
 856         __ATTR_WO(silent);
 857 static struct kobj_attribute synth_attribute =
 858         __ATTR_RW(synth);
 859 static struct kobj_attribute synth_direct_attribute =
 860         __ATTR_WO(synth_direct);
 861 static struct kobj_attribute version_attribute =
 862         __ATTR_RO(version);
 863
 864 static struct kobj_attribute delimiters_attribute =
 865         __ATTR(delimiters, S_IWUSR | S_IRUGO, punc_show, punc_store);
 866 static struct kobj_attribute ex_num_attribute =
 867         __ATTR(ex_num, S_IWUSR | S_IRUGO, punc_show, punc_store);
 868 static struct kobj_attribute punc_all_attribute =
 869         __ATTR(punc_all, S_IWUSR | S_IRUGO, punc_show, punc_store);
 870 static struct kobj_attribute punc_most_attribute =
 871         __ATTR(punc_most, S_IWUSR | S_IRUGO, punc_show, punc_store);
 872 static struct kobj_attribute punc_some_attribute =
 873         __ATTR(punc_some, S_IWUSR | S_IRUGO, punc_show, punc_store);
 874 static struct kobj_attribute repeats_attribute =
 875         __ATTR(repeats, S_IWUSR | S_IRUGO, punc_show, punc_store);
 876
 877 static struct kobj_attribute attrib_bleep_attribute =
 878         __ATTR(attrib_bleep, S_IWUSR | S_IRUGO, spk_var_show, spk_var_store);
 879 static struct kobj_attribute bell_pos_attribute =
 880         __ATTR(bell_pos, S_IWUSR | S_IRUGO, spk_var_show, spk_var_store);
 881 static struct kobj_attribute bleep_time_attribute =
 882         __ATTR(bleep_time, S_IWUSR | S_IRUGO, spk_var_show, spk_var_store);
 883 static struct kobj_attribute bleeps_attribute =
 884         __ATTR(bleeps, S_IWUSR | S_IRUGO, spk_var_show, spk_var_store);
 885 static struct kobj_attribute cursor_time_attribute =
 886         __ATTR(cursor_time, S_IWUSR | S_IRUGO, spk_var_show, spk_var_store);
 887 static struct kobj_attribute key_echo_attribute =
 888         __ATTR(key_echo, S_IWUSR | S_IRUGO, spk_var_show, spk_var_store);
 889 static struct kobj_attribute no_interrupt_attribute =
 890         __ATTR(no_interrupt, S_IWUSR | S_IRUGO, spk_var_show, spk_var_store);
 891 static struct kobj_attribute punc_level_attribute =
 892         __ATTR(punc_level, S_IWUSR | S_IRUGO, spk_var_show, spk_var_store);
 893 static struct kobj_attribute reading_punc_attribute =
 894         __ATTR(reading_punc, S_IWUSR | S_IRUGO, spk_var_show, spk_var_store);
 895 static struct kobj_attribute say_control_attribute =
 896         __ATTR(say_control, S_IWUSR | S_IRUGO, spk_var_show, spk_var_store);
 897 static struct kobj_attribute say_word_ctl_attribute =
 898         __ATTR(say_word_ctl, S_IWUSR | S_IRUGO, spk_var_show, spk_var_store);
 899 static struct kobj_attribute spell_delay_attribute =
 900         __ATTR(spell_delay, S_IWUSR | S_IRUGO, spk_var_show, spk_var_store);
 901
 902 /*
 903  * These attributes are i18n related.
 904  */
 905 static struct kobj_attribute announcements_attribute =
 906         __ATTR(announcements, S_IWUSR | S_IRUGO, message_show, message_store);
 907 static struct kobj_attribute characters_attribute =
 908         __ATTR(characters, S_IWUSR | S_IRUGO, chars_chartab_show,
 909                chars_chartab_store);
 910 static struct kobj_attribute chartab_attribute =
 911         __ATTR(chartab, S_IWUSR | S_IRUGO, chars_chartab_show,
 912                chars_chartab_store);
 913 static struct kobj_attribute ctl_keys_attribute =
 914         __ATTR(ctl_keys, S_IWUSR | S_IRUGO, message_show, message_store);
 915 static struct kobj_attribute colors_attribute =
 916         __ATTR(colors, S_IWUSR | S_IRUGO, message_show, message_store);
 917 static struct kobj_attribute formatted_attribute =
 918         __ATTR(formatted, S_IWUSR | S_IRUGO, message_show, message_store);
 919 static struct kobj_attribute function_names_attribute =
 920         __ATTR(function_names, S_IWUSR | S_IRUGO, message_show, message_store);
 921 static struct kobj_attribute key_names_attribute =
 922         __ATTR(key_names, S_IWUSR | S_IRUGO, message_show, message_store);
 923 static struct kobj_attribute states_attribute =
 924         __ATTR(states, S_IWUSR | S_IRUGO, message_show, message_store);
 925
 926 /*
 927  * Create groups of attributes so that we can create and destroy them all
 928  * at once.
 929  */
 930 static struct attribute *main_attrs[] = {
 931         &keymap_attribute.attr,
 932         &silent_attribute.attr,
 933         &synth_attribute.attr,
 934         &synth_direct_attribute.attr,
 935         &version_attribute.attr,
 936         &delimiters_attribute.attr,
 937         &ex_num_attribute.attr,
 938         &punc_all_attribute.attr,
 939         &punc_most_attribute.attr,
 940         &punc_some_attribute.attr,
 941         &repeats_attribute.attr,
 942         &attrib_bleep_attribute.attr,
 943         &bell_pos_attribute.attr,
 944         &bleep_time_attribute.attr,
 945         &bleeps_attribute.attr,
 946         &cursor_time_attribute.attr,
 947         &key_echo_attribute.attr,
 948         &no_interrupt_attribute.attr,
 949         &punc_level_attribute.attr,
 950         &reading_punc_attribute.attr,
 951         &say_control_attribute.attr,
 952         &say_word_ctl_attribute.attr,
 953         &spell_delay_attribute.attr,
 954         NULL,
 955 };
 956
 957 static struct attribute *i18n_attrs[] = {
 958         &announcements_attribute.attr,
 959         &characters_attribute.attr,
 960         &chartab_attribute.attr,
 961         &ctl_keys_attribute.attr,
 962         &colors_attribute.attr,
 963         &formatted_attribute.attr,
 964         &function_names_attribute.attr,
 965         &key_names_attribute.attr,
 966         &states_attribute.attr,
 967         NULL,
 968 };
 969
 970 /*
 971  * An unnamed attribute group will put all of the attributes directly in
 972  * the kobject directory.  If we specify a name, a subdirectory will be
 973  * created for the attributes with the directory being the name of the
 974  * attribute group.
 975  */
 976 static struct attribute_group main_attr_group = {
 977         .attrs = main_attrs,
 978 };
 979
 980 static struct attribute_group i18n_attr_group = {
 981         .attrs = i18n_attrs,
 982         .name = "i18n",
 983 };
 984
 985 static struct kobject *accessibility_kobj;
 986 struct kobject *speakup_kobj;
 987
 988 int speakup_kobj_init(void)
 989 {
 990         int retval;
 991
 992         /*
 993          * Create a simple kobject with the name of "accessibility",
 994          * located under /sys/
 995          *
 996          * As this is a simple directory, no uevent will be sent to
 997          * userspace.  That is why this function should not be used for
 998          * any type of dynamic kobjects, where the name and number are
 999          * not known ahead of time.
1000          */
1001         accessibility_kobj = kobject_create_and_add("accessibility", NULL);
1002         if (!accessibility_kobj) {
1003                 retval = -ENOMEM;
1004                 goto out;
1005         }
1006
1007         speakup_kobj = kobject_create_and_add("speakup", accessibility_kobj);
1008         if (!speakup_kobj) {
1009                 retval = -ENOMEM;
1010                 goto err_acc;
1011         }
1012
1013         /* Create the files associated with this kobject */
1014         retval = sysfs_create_group(speakup_kobj, &main_attr_group);
1015         if (retval)
1016                 goto err_speakup;
1017
1018         retval = sysfs_create_group(speakup_kobj, &i18n_attr_group);
1019         if (retval)
1020                 goto err_group;
1021
1022         goto out;
1023
1024 err_group:
1025         sysfs_remove_group(speakup_kobj, &main_attr_group);
1026 err_speakup:
1027         kobject_put(speakup_kobj);
1028 err_acc:
1029         kobject_put(accessibility_kobj);
1030 out:
1031         return retval;
1032 }
1033
1034 void speakup_kobj_exit(void)
1035 {
1036         sysfs_remove_group(speakup_kobj, &i18n_attr_group);
1037         sysfs_remove_group(speakup_kobj, &main_attr_group);
1038         kobject_put(speakup_kobj);
1039         kobject_put(accessibility_kobj);
1040 }