| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | #include "../libnetdata.h" |
| 4 | |
| 5 | #define PF_PREFIX "PROCFILE" |
| 6 | |
| 7 | #define PFWORDS_INCREASE_STEP 2000 |
| 8 | #define PFLINES_INCREASE_STEP 200 |
| 9 | #define PROCFILE_INCREMENT_BUFFER 4096 |
| 10 | |
| 11 | int procfile_open_flags = O_RDONLY | O_CLOEXEC; |
| 12 | |
| 13 | // if adaptive allocation is set, these store the |
| 14 | // max values we have seen so far |
| 15 | static bool procfile_adaptive_initial_allocation = false; |
| 16 | static size_t procfile_max_lines = PFLINES_INCREASE_STEP; |
| 17 | static size_t procfile_max_words = PFWORDS_INCREASE_STEP; |
| 18 | static size_t procfile_max_allocation = PROCFILE_INCREMENT_BUFFER; |
| 19 | |
| 20 | void procfile_set_adaptive_allocation(bool enable, size_t bytes, size_t lines, size_t words) { |
| 21 | procfile_adaptive_initial_allocation = enable; |
| 22 | |
| 23 | if(bytes > procfile_max_allocation) |
| 24 | procfile_max_allocation = bytes; |
| 25 | if(lines > procfile_max_lines) |
| 26 | procfile_max_lines = lines; |
| 27 | if(words > procfile_max_words) |
| 28 | procfile_max_words = words; |
| 29 | } |
| 30 | |
| 31 | // ---------------------------------------------------------------------------- |
| 32 | |
| 33 | char *procfile_filename(procfile *ff) { |
| 34 | if(ff->filename) |
| 35 | return ff->filename; |
| 36 | |
| 37 | char filename[FILENAME_MAX + 1]; |
| 38 | char buffer[FILENAME_MAX + 1]; |
| 39 | snprintfz(buffer, FILENAME_MAX, "/proc/self/fd/%d", ff->fd); |
| 40 | |
| 41 | ssize_t l = readlink(buffer, filename, FILENAME_MAX); |
| 42 | if(unlikely(l == -1)) |
| 43 | snprintfz(filename, FILENAME_MAX, "unknown filename for fd %d", ff->fd); |
| 44 | else |
| 45 | filename[l] = '\0'; |
| 46 | |
| 47 | |
| 48 | ff->filename = strdupz(filename); |
| 49 | |
| 50 | // on non-linux systems, something like this will be needed |
| 51 | // fcntl(ff->fd, F_GETPATH, ff->filename) |
| 52 | |
| 53 | return ff->filename; |
| 54 | } |
| 55 | |
| 56 | // ---------------------------------------------------------------------------- |
| 57 | // An array of words |
| 58 | |
| 59 | static inline void procfile_words_add(procfile *ff, char *str) { |
| 60 | // netdata_log_debug(D_PROCFILE, PF_PREFIX ": adding word No %d: '%s'", fw->len, str); |
| 61 | |
| 62 | pfwords *fw = ff->words; |
| 63 | if(unlikely(fw->len == fw->size)) { |
| 64 | // netdata_log_debug(D_PROCFILE, PF_PREFIX ": expanding words"); |
| 65 | size_t minimum = PFWORDS_INCREASE_STEP; |
| 66 | size_t optimal = fw->size / 2; |
| 67 | size_t wanted = (optimal > minimum)?optimal:minimum; |
| 68 | |
| 69 | ff->words = fw = reallocz(fw, sizeof(pfwords) + (fw->size + wanted) * sizeof(char *)); |
| 70 | fw->size += wanted; |
| 71 | ff->stats.memory += wanted * sizeof(char *); |
| 72 | ff->stats.resizes++; |
| 73 | } |
| 74 | |
| 75 | fw->words[fw->len++] = str; |
| 76 | } |
| 77 | |
| 78 | NEVERNULL |
| 79 | static inline pfwords *procfile_words_create(void) { |
| 80 | // netdata_log_debug(D_PROCFILE, PF_PREFIX ": initializing words"); |
| 81 | |
| 82 | size_t size = (procfile_adaptive_initial_allocation) ? procfile_max_words : PFWORDS_INCREASE_STEP; |
| 83 | |
| 84 | pfwords *new = mallocz(sizeof(pfwords) + size * sizeof(char *)); |
| 85 | new->len = 0; |
| 86 | new->size = size; |
| 87 | return new; |
| 88 | } |
| 89 | |
| 90 | static inline void procfile_words_reset(pfwords *fw) { |
| 91 | // netdata_log_debug(D_PROCFILE, PF_PREFIX ": resetting words"); |
| 92 | fw->len = 0; |
| 93 | } |
| 94 | |
| 95 | static inline void procfile_words_free(pfwords *fw) { |
| 96 | // netdata_log_debug(D_PROCFILE, PF_PREFIX ": freeing words"); |
| 97 | |
| 98 | freez(fw); |
| 99 | } |
| 100 | |
| 101 | |
| 102 | // ---------------------------------------------------------------------------- |
| 103 | // An array of lines |
| 104 | |
| 105 | NEVERNULL |
| 106 | static inline uint32_t *procfile_lines_add(procfile *ff) { |
| 107 | // netdata_log_debug(D_PROCFILE, PF_PREFIX ": adding line %d at word %d", fl->len, first_word); |
| 108 | |
| 109 | pflines *fl = ff->lines; |
| 110 | if(unlikely(fl->len == fl->size)) { |
| 111 | // netdata_log_debug(D_PROCFILE, PF_PREFIX ": expanding lines"); |
| 112 | size_t minimum = PFLINES_INCREASE_STEP; |
| 113 | size_t optimal = fl->size / 2; |
| 114 | size_t wanted = (optimal > minimum)?optimal:minimum; |
| 115 | |
| 116 | ff->lines = fl = reallocz(fl, sizeof(pflines) + (fl->size + wanted) * sizeof(ffline)); |
| 117 | fl->size += wanted; |
| 118 | ff->stats.memory += wanted * sizeof(ffline); |
| 119 | ff->stats.resizes++; |
| 120 | } |
| 121 | |
| 122 | ffline *ffl = &fl->lines[fl->len++]; |
| 123 | ffl->words = 0; |
| 124 | ffl->first = ff->words->len; |
| 125 | |
| 126 | return &ffl->words; |
| 127 | } |
| 128 | |
| 129 | NEVERNULL |
| 130 | static inline pflines *procfile_lines_create(void) { |
| 131 | // netdata_log_debug(D_PROCFILE, PF_PREFIX ": initializing lines"); |
| 132 | |
| 133 | size_t size = (unlikely(procfile_adaptive_initial_allocation)) ? procfile_max_words : PFLINES_INCREASE_STEP; |
| 134 | |
| 135 | pflines *new = mallocz(sizeof(pflines) + size * sizeof(ffline)); |
| 136 | new->len = 0; |
| 137 | new->size = size; |
| 138 | return new; |
| 139 | } |
| 140 | |
| 141 | static inline void procfile_lines_reset(pflines *fl) { |
| 142 | // netdata_log_debug(D_PROCFILE, PF_PREFIX ": resetting lines"); |
| 143 | |
| 144 | fl->len = 0; |
| 145 | } |
| 146 | |
| 147 | static inline void procfile_lines_free(pflines *fl) { |
| 148 | // netdata_log_debug(D_PROCFILE, PF_PREFIX ": freeing lines"); |
| 149 | |
| 150 | freez(fl); |
| 151 | } |
| 152 | |
| 153 | |
| 154 | // ---------------------------------------------------------------------------- |
| 155 | // The procfile |
| 156 | |
| 157 | void procfile_close(procfile *ff) { |
| 158 | if(unlikely(!ff)) return; |
| 159 | |
| 160 | netdata_log_debug(D_PROCFILE, PF_PREFIX ": Closing file '%s'", procfile_filename(ff)); |
| 161 | |
| 162 | freez(ff->filename); |
| 163 | procfile_lines_free(ff->lines); |
| 164 | procfile_words_free(ff->words); |
| 165 | |
| 166 | if(likely(ff->fd != -1)) close(ff->fd); |
| 167 | freez(ff); |
| 168 | } |
| 169 | |
| 170 | NOINLINE |
| 171 | static void procfile_parser(procfile *ff) { |
| 172 | // netdata_log_debug(D_PROCFILE, PF_PREFIX ": Parsing file '%s'", ff->filename); |
| 173 | |
| 174 | char *s = ff->data // our current position |
| 175 | , *e = &ff->data[ff->len] // the terminating null |
| 176 | , *t = ff->data; // the first character of a word (or quoted / parenthesized string) |
| 177 | |
| 178 | // the look up array to find our type of character |
| 179 | PF_CHAR_TYPE *separators = ff->separators; |
| 180 | |
| 181 | char quote = 0; // the quote character - only when in quoted string |
| 182 | size_t opened = 0; // counts the number of open parenthesis |
| 183 | |
| 184 | uint32_t *line_words = procfile_lines_add(ff); |
| 185 | |
| 186 | while(s < e) { |
| 187 | PF_CHAR_TYPE ct = separators[(unsigned char)(*s)]; |
| 188 | |
| 189 | // this is faster than a switch() |
| 190 | // read more here: http://lazarenko.me/switch/ |
| 191 | if(likely(ct == PF_CHAR_IS_WORD)) { |
| 192 | s++; |
| 193 | } |
| 194 | else if(likely(ct == PF_CHAR_IS_SEPARATOR)) { |
| 195 | if(!quote && !opened) { |
| 196 | if (s != t) { |
| 197 | // separator, but we have word before it |
| 198 | *s = '\0'; |
| 199 | procfile_words_add(ff, t); |
| 200 | (*line_words)++; |
| 201 | t = ++s; |
| 202 | } |
| 203 | else { |
| 204 | // separator at the beginning |
| 205 | // skip it |
| 206 | t = ++s; |
| 207 | } |
| 208 | } |
| 209 | else { |
| 210 | // we are inside a quote or parenthesized string |
| 211 | s++; |
| 212 | } |
| 213 | } |
| 214 | else if(likely(ct == PF_CHAR_IS_NEWLINE)) { |
| 215 | // end of line |
| 216 | |
| 217 | *s = '\0'; |
| 218 | procfile_words_add(ff, t); |
| 219 | (*line_words)++; |
| 220 | t = ++s; |
| 221 | |
| 222 | // netdata_log_debug(D_PROCFILE, PF_PREFIX ": ended line %d with %d words", l, ff->lines->lines[l].words); |
| 223 | |
| 224 | line_words = procfile_lines_add(ff); |
| 225 | } |
| 226 | else if(likely(ct == PF_CHAR_IS_QUOTE)) { |
| 227 | if(unlikely(!quote && s == t)) { |
| 228 | // quote opened at the beginning |
| 229 | quote = *s; |
| 230 | t = ++s; |
| 231 | } |
| 232 | else if(unlikely(quote && quote == *s)) { |
| 233 | // quote closed |
| 234 | quote = 0; |
| 235 | |
| 236 | *s = '\0'; |
| 237 | procfile_words_add(ff, t); |
| 238 | (*line_words)++; |
| 239 | t = ++s; |
| 240 | } |
| 241 | else |
| 242 | s++; |
| 243 | } |
| 244 | else if(likely(ct == PF_CHAR_IS_OPEN)) { |
| 245 | if(s == t) { |
| 246 | if(!opened) |
| 247 | t = ++s; |
| 248 | else |
| 249 | ++s; |
| 250 | |
| 251 | opened++; |
| 252 | } |
| 253 | else if(opened) { |
| 254 | opened++; |
| 255 | s++; |
| 256 | } |
| 257 | else |
| 258 | s++; |
| 259 | } |
| 260 | else if(likely(ct == PF_CHAR_IS_CLOSE)) { |
| 261 | if(opened) { |
| 262 | opened--; |
| 263 | |
| 264 | if(!opened) { |
| 265 | *s = '\0'; |
| 266 | procfile_words_add(ff, t); |
| 267 | (*line_words)++; |
| 268 | t = ++s; |
| 269 | } |
| 270 | else |
| 271 | s++; |
| 272 | } |
| 273 | else |
| 274 | s++; |
| 275 | } |
| 276 | else |
| 277 | fatal("Internal Error: procfile_readall() does not handle all the cases."); |
| 278 | } |
| 279 | |
| 280 | if(likely(s > t && t < e)) { |
| 281 | // the last word |
| 282 | if(unlikely(ff->len >= ff->size)) { |
| 283 | // we are going to loose the last byte |
| 284 | s = &ff->data[ff->size - 1]; |
| 285 | } |
| 286 | |
| 287 | *s = '\0'; |
| 288 | procfile_words_add(ff, t); |
| 289 | (*line_words)++; |
| 290 | // t = ++s; |
| 291 | } |
| 292 | } |
| 293 | |
| 294 | procfile *procfile_readall(procfile *ff) { |
| 295 | if(!ff) return NULL; |
| 296 | |
| 297 | // netdata_log_debug(D_PROCFILE, PF_PREFIX ": Reading file '%s'.", ff->filename); |
| 298 | |
| 299 | ff->len = 0; // zero the used size |
| 300 | ssize_t r = 1; // read at least once |
| 301 | while(r > 0) { |
| 302 | ssize_t s = ff->len; |
| 303 | ssize_t x = ff->size - s; |
| 304 | |
| 305 | if(unlikely(!x)) { |
| 306 | size_t minimum = PROCFILE_INCREMENT_BUFFER; |
| 307 | size_t optimal = ff->size / 2; |
| 308 | size_t wanted = (optimal > minimum)?optimal:minimum; |
| 309 | |
| 310 | netdata_log_debug(D_PROCFILE, PF_PREFIX ": Expanding data buffer for file '%s' by %zu bytes.", procfile_filename(ff), wanted); |
| 311 | ff = reallocz(ff, sizeof(procfile) + ff->size + wanted); |
| 312 | ff->size += wanted; |
| 313 | ff->stats.memory += wanted; |
| 314 | ff->stats.resizes++; |
| 315 | } |
| 316 | |
| 317 | // netdata_log_info("Reading file '%s', from position %zd with length %zd", procfile_filename(ff), s, (ssize_t)(ff->size - s)); |
| 318 | ff->stats.reads++; |
| 319 | r = read(ff->fd, &ff->data[s], ff->size - s); |
| 320 | if(unlikely(r == -1)) { |
| 321 | if(unlikely(!(ff->flags & PROCFILE_FLAG_NO_ERROR_ON_FILE_IO))) collector_error(PF_PREFIX ": Cannot read from file '%s' on fd %d", procfile_filename(ff), ff->fd); |
| 322 | else if(unlikely(ff->flags & PROCFILE_FLAG_ERROR_ON_ERROR_LOG)) |
| 323 | netdata_log_error(PF_PREFIX ": Cannot read from file '%s' on fd %d", procfile_filename(ff), ff->fd); |
| 324 | procfile_close(ff); |
| 325 | return NULL; |
| 326 | } |
| 327 | |
| 328 | if((ssize_t)ff->stats.max_read_size < r) |
| 329 | ff->stats.max_read_size = r; |
| 330 | |
| 331 | ff->len += r; |
| 332 | } |
| 333 | |
| 334 | if (unlikely(ff->flags & PROCFILE_FLAG_NONSEEKABLE)) { |
| 335 | char *fn = procfile_filename(ff); |
| 336 | ff = procfile_reopen(ff, fn, NULL, ff->flags); |
| 337 | if (unlikely(!ff)) |
| 338 | return NULL; |
| 339 | } else if (unlikely(lseek(ff->fd, 0, SEEK_SET) == -1)) { |
| 340 | // Some procfs files (Ubuntu HWE 24.04 / kernel 6.14) may be non-seekable. |
| 341 | // In that case, "rewind" by reopening. |
| 342 | if (errno == ESPIPE || errno == EINVAL) { |
| 343 | ff->flags |= PROCFILE_FLAG_NONSEEKABLE; |
| 344 | char *fn = procfile_filename(ff); |
| 345 | ff = procfile_reopen(ff, fn, NULL, ff->flags); |
| 346 | if (unlikely(!ff)) |
| 347 | return NULL; |
| 348 | } else { |
| 349 | if (unlikely(!(ff->flags & PROCFILE_FLAG_NO_ERROR_ON_FILE_IO))) |
| 350 | collector_error(PF_PREFIX ": Cannot rewind on file '%s'.", procfile_filename(ff)); |
| 351 | else if (unlikely(ff->flags & PROCFILE_FLAG_ERROR_ON_ERROR_LOG)) |
| 352 | netdata_log_error(PF_PREFIX ": Cannot rewind on file '%s'.", procfile_filename(ff)); |
| 353 | procfile_close(ff); |
| 354 | return NULL; |
| 355 | } |
| 356 | } |
| 357 | |
| 358 | procfile_lines_reset(ff->lines); |
| 359 | procfile_words_reset(ff->words); |
| 360 | procfile_parser(ff); |
| 361 | |
| 362 | if(unlikely(procfile_adaptive_initial_allocation)) { |
| 363 | if(unlikely(ff->len > procfile_max_allocation)) procfile_max_allocation = ff->len; |
| 364 | if(unlikely(ff->lines->len > procfile_max_lines)) procfile_max_lines = ff->lines->len; |
| 365 | if(unlikely(ff->words->len > procfile_max_words)) procfile_max_words = ff->words->len; |
| 366 | } |
| 367 | |
| 368 | if(ff->stats.max_source_bytes < ff->len) |
| 369 | ff->stats.max_source_bytes = ff->len; |
| 370 | |
| 371 | if(ff->stats.max_lines < ff->lines->len) |
| 372 | ff->stats.max_lines = ff->lines->len; |
| 373 | |
| 374 | if(ff->stats.max_words < ff->words->len) |
| 375 | ff->stats.max_words = ff->words->len; |
| 376 | |
| 377 | ff->stats.total_read_bytes += ff->len; |
| 378 | |
| 379 | // netdata_log_debug(D_PROCFILE, "File '%s' updated.", ff->filename); |
| 380 | return ff; |
| 381 | } |
| 382 | |
| 383 | static PF_CHAR_TYPE procfile_default_separators[256]; |
| 384 | __attribute__((constructor)) void procfile_initialize_default_separators(void) { |
| 385 | int i = 256; |
| 386 | while(i--) { |
| 387 | if(unlikely(i == '\n' || i == '\r')) |
| 388 | procfile_default_separators[i] = PF_CHAR_IS_NEWLINE; |
| 389 | |
| 390 | else if(unlikely(isspace(i) || (!isprint(i) && !IS_UTF8_BYTE(i)))) |
| 391 | procfile_default_separators[i] = PF_CHAR_IS_SEPARATOR; |
| 392 | |
| 393 | else |
| 394 | procfile_default_separators[i] = PF_CHAR_IS_WORD; |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | NOINLINE |
| 399 | static void procfile_set_separators(procfile *ff, const char *separators) { |
| 400 | // set the separators |
| 401 | if(unlikely(!separators)) |
| 402 | separators = " \t=|"; |
| 403 | |
| 404 | // copy the default |
| 405 | memcpy(ff->separators, procfile_default_separators, 256 * sizeof(PF_CHAR_TYPE)); |
| 406 | |
| 407 | PF_CHAR_TYPE *ffs = ff->separators; |
| 408 | const char *s = separators; |
| 409 | while(*s) |
| 410 | ffs[(int)*s++] = PF_CHAR_IS_SEPARATOR; |
| 411 | } |
| 412 | |
| 413 | void procfile_set_quotes(procfile *ff, const char *quotes) { |
| 414 | PF_CHAR_TYPE *ffs = ff->separators; |
| 415 | |
| 416 | // remove all quotes |
| 417 | int i = 256; |
| 418 | while(i--) |
| 419 | if(unlikely(ffs[i] == PF_CHAR_IS_QUOTE)) |
| 420 | ffs[i] = PF_CHAR_IS_WORD; |
| 421 | |
| 422 | // if nothing given, return |
| 423 | if(unlikely(!quotes || !*quotes)) |
| 424 | return; |
| 425 | |
| 426 | // set the quotes |
| 427 | const char *s = quotes; |
| 428 | while(*s) |
| 429 | ffs[(int)*s++] = PF_CHAR_IS_QUOTE; |
| 430 | } |
| 431 | |
| 432 | void procfile_set_open_close(procfile *ff, const char *open, const char *close) { |
| 433 | PF_CHAR_TYPE *ffs = ff->separators; |
| 434 | |
| 435 | // remove all open/close |
| 436 | int i = 256; |
| 437 | while(i--) |
| 438 | if(unlikely(ffs[i] == PF_CHAR_IS_OPEN || ffs[i] == PF_CHAR_IS_CLOSE)) |
| 439 | ffs[i] = PF_CHAR_IS_WORD; |
| 440 | |
| 441 | // if nothing given, return |
| 442 | if(unlikely(!open || !*open || !close || !*close)) |
| 443 | return; |
| 444 | |
| 445 | // set the openings |
| 446 | const char *s = open; |
| 447 | while(*s) |
| 448 | ffs[(int)*s++] = PF_CHAR_IS_OPEN; |
| 449 | |
| 450 | // set the closings |
| 451 | s = close; |
| 452 | while(*s) |
| 453 | ffs[(int)*s++] = PF_CHAR_IS_CLOSE; |
| 454 | } |
| 455 | |
| 456 | procfile *procfile_open(const char *filename, const char *separators, uint32_t flags) { |
| 457 | netdata_log_debug(D_PROCFILE, PF_PREFIX ": Opening file '%s'", filename); |
| 458 | |
| 459 | int fd = open(filename, procfile_open_flags, 0666); |
| 460 | if(unlikely(fd == -1)) { |
| 461 | if (unlikely(flags & PROCFILE_FLAG_ERROR_ON_ERROR_LOG)) |
| 462 | netdata_log_error(PF_PREFIX ": Cannot open file '%s'", filename); |
| 463 | else if (unlikely(!(flags & PROCFILE_FLAG_NO_ERROR_ON_FILE_IO))) { |
| 464 | if (errno == ENOENT) |
| 465 | collector_info(PF_PREFIX ": Cannot open file '%s'", filename); |
| 466 | else |
| 467 | collector_error(PF_PREFIX ": Cannot open file '%s'", filename); |
| 468 | } |
| 469 | return NULL; |
| 470 | } |
| 471 | |
| 472 | // netdata_log_info("PROCFILE: opened '%s' on fd %d", filename, fd); |
| 473 | |
| 474 | size_t size = (unlikely(procfile_adaptive_initial_allocation)) ? procfile_max_allocation : PROCFILE_INCREMENT_BUFFER; |
| 475 | procfile *ff = mallocz(sizeof(procfile) + size); |
| 476 | |
| 477 | //strncpyz(ff->filename, filename, FILENAME_MAX); |
| 478 | ff->filename = NULL; |
| 479 | ff->fd = fd; |
| 480 | ff->size = size; |
| 481 | ff->len = 0; |
| 482 | ff->flags = flags; |
| 483 | ff->stats.opens = 1; |
| 484 | ff->stats.reads = ff->stats.resizes = 0; |
| 485 | ff->stats.max_lines = ff->stats.max_words = ff->stats.max_source_bytes = 0; |
| 486 | ff->stats.total_read_bytes = ff->stats.max_read_size = 0; |
| 487 | |
| 488 | ff->lines = procfile_lines_create(); |
| 489 | ff->words = procfile_words_create(); |
| 490 | |
| 491 | ff->stats.memory = sizeof(procfile) + size + |
| 492 | (sizeof(pflines) + ff->lines->size * sizeof(ffline)) + |
| 493 | (sizeof(pfwords) + ff->words->size * sizeof(char *)); |
| 494 | |
| 495 | procfile_set_separators(ff, separators); |
| 496 | |
| 497 | netdata_log_debug(D_PROCFILE, "File '%s' opened.", filename); |
| 498 | return ff; |
| 499 | } |
| 500 | |
| 501 | procfile *procfile_reopen(procfile *ff, const char *filename, const char *separators, uint32_t flags) { |
| 502 | if(unlikely(!ff)) return procfile_open(filename, separators, flags); |
| 503 | |
| 504 | if(likely(ff->fd != -1)) { |
| 505 | // netdata_log_info("PROCFILE: closing fd %d", ff->fd); |
| 506 | close(ff->fd); |
| 507 | } |
| 508 | |
| 509 | ff->fd = open(filename, procfile_open_flags, 0666); |
| 510 | if(unlikely(ff->fd == -1)) { |
| 511 | procfile_close(ff); |
| 512 | return NULL; |
| 513 | } |
| 514 | ff->stats.opens++; |
| 515 | |
| 516 | // IMPORTANT: 'filename' parameter must not be used after this point |
| 517 | // as it may point to ff->filename which we're about to free |
| 518 | freez(ff->filename); |
| 519 | ff->filename = NULL; |
| 520 | ff->flags = flags; |
| 521 | |
| 522 | // do not do the separators again if NULL is given |
| 523 | if(likely(separators)) procfile_set_separators(ff, separators); |
| 524 | |
| 525 | return ff; |
| 526 | } |
| 527 | |
| 528 | // ---------------------------------------------------------------------------- |
| 529 | // example parsing of procfile data |
| 530 | |
| 531 | void procfile_print(procfile *ff) { |
| 532 | size_t lines = procfile_lines(ff), l; |
| 533 | char *s; |
| 534 | (void)s; |
| 535 | |
| 536 | netdata_log_debug(D_PROCFILE, "File '%s' with %zu lines and %zu words", procfile_filename(ff), ff->lines->len, ff->words->len); |
| 537 | |
| 538 | for(l = 0; likely(l < lines) ;l++) { |
| 539 | size_t words = procfile_linewords(ff, l); |
| 540 | |
| 541 | netdata_log_debug(D_PROCFILE, " line %zu starts at word %zu and has %zu words", l, (size_t)ff->lines->lines[l].first, (size_t)ff->lines->lines[l].words); |
| 542 | |
| 543 | size_t w; |
| 544 | for(w = 0; likely(w < words) ;w++) { |
| 545 | s = procfile_lineword(ff, l, w); |
| 546 | netdata_log_debug(D_PROCFILE, " [%zu.%zu] '%s'", l, w, s); |
| 547 | } |
| 548 | } |
| 549 | } |