| 1 | /* |
| 2 | * Copyright (c) 1997 Metro Link Incorporated |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 5 | * copy of this software and associated documentation files (the "Software"), |
| 6 | * to deal in the Software without restriction, including without limitation |
| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
| 9 | * Software is furnished to do so, subject to the following conditions: |
| 10 | * |
| 11 | * The above copyright notice and this permission notice shall be included in |
| 12 | * all copies or substantial portions of the Software. |
| 13 | * |
| 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 17 | * THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| 18 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF |
| 19 | * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 20 | * SOFTWARE. |
| 21 | * |
| 22 | * Except as contained in this notice, the name of the Metro Link shall not be |
| 23 | * used in advertising or otherwise to promote the sale, use or other dealings |
| 24 | * in this Software without prior written authorization from Metro Link. |
| 25 | * |
| 26 | */ |
| 27 | /* |
| 28 | * Copyright (c) 1997-2003 by The XFree86 Project, Inc. |
| 29 | * |
| 30 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 31 | * copy of this software and associated documentation files (the "Software"), |
| 32 | * to deal in the Software without restriction, including without limitation |
| 33 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 34 | * and/or sell copies of the Software, and to permit persons to whom the |
| 35 | * Software is furnished to do so, subject to the following conditions: |
| 36 | * |
| 37 | * The above copyright notice and this permission notice shall be included in |
| 38 | * all copies or substantial portions of the Software. |
| 39 | * |
| 40 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 41 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 42 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 43 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 44 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 45 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 46 | * OTHER DEALINGS IN THE SOFTWARE. |
| 47 | * |
| 48 | * Except as contained in this notice, the name of the copyright holder(s) |
| 49 | * and author(s) shall not be used in advertising or otherwise to promote |
| 50 | * the sale, use or other dealings in this Software without prior written |
| 51 | * authorization from the copyright holder(s) and author(s). |
| 52 | */ |
| 53 | |
| 54 | #ifdef HAVE_XORG_CONFIG_H |
| 55 | #include <xorg-config.h> |
| 56 | #endif |
| 57 | |
| 58 | #include <ctype.h> |
| 59 | #include <stdio.h> |
| 60 | #include <stdlib.h> |
| 61 | #include <string.h> |
| 62 | #include <sys/types.h> |
| 63 | #include <dirent.h> |
| 64 | #include <unistd.h> |
| 65 | #include <stdarg.h> |
| 66 | #include <X11/Xdefs.h> |
| 67 | #include <X11/Xfuncproto.h> |
| 68 | |
| 69 | #if defined(_POSIX_SOURCE) |
| 70 | #include <limits.h> |
| 71 | #else |
| 72 | #define _POSIX_SOURCE |
| 73 | #include <limits.h> |
| 74 | #undef _POSIX_SOURCE |
| 75 | #endif /* _POSIX_SOURCE */ |
| 76 | |
| 77 | #if !defined(MAXHOSTNAMELEN) |
| 78 | #define MAXHOSTNAMELEN 32 |
| 79 | #endif /* !MAXHOSTNAMELEN */ |
| 80 | |
| 81 | /* For PATH_MAX */ |
| 82 | #include "misc.h" |
| 83 | |
| 84 | #include "Configint.h" |
| 85 | #include "xf86tokens.h" |
| 86 | |
| 87 | #define CONFIG_BUF_LEN 1024 |
| 88 | #define CONFIG_MAX_FILES 64 |
| 89 | |
| 90 | static int StringToToken(const char *, xf86ConfigSymTabRec *); |
| 91 | |
| 92 | static struct { |
| 93 | FILE *file; |
| 94 | char *path; |
| 95 | } configFiles[CONFIG_MAX_FILES]; |
| 96 | static const char **builtinConfig = NULL; |
| 97 | static int builtinIndex = 0; |
| 98 | static int configPos = 0; /* current readers position */ |
| 99 | static int configLineNo = 0; /* linenumber */ |
| 100 | static char *configBuf, *configRBuf; /* buffer for lines */ |
| 101 | static char *configSection = NULL; /* name of current section being parsed */ |
| 102 | static int numFiles = 0; /* number of config files */ |
| 103 | static int curFileIndex = 0; /* index of current config file */ |
| 104 | static int pushToken = LOCK_TOKEN; |
| 105 | static int eol_seen = 0; /* private state to handle comments */ |
| 106 | LexRec val; |
| 107 | |
| 108 | /* |
| 109 | * xf86getNextLine -- |
| 110 | * |
| 111 | * read from the configFiles FILE stream until we encounter a new |
| 112 | * line; this is effectively just a big wrapper for fgets(3). |
| 113 | * |
| 114 | * xf86getToken() assumes that we will read up to the next |
| 115 | * newline; we need to grow configBuf and configRBuf as needed to |
| 116 | * support that. |
| 117 | */ |
| 118 | |
| 119 | static char * |
| 120 | xf86getNextLine(void) |
| 121 | { |
| 122 | static int configBufLen = CONFIG_BUF_LEN; |
| 123 | char *tmpConfigBuf, *tmpConfigRBuf; |
| 124 | int c, i, pos = 0, eolFound = 0; |
| 125 | char *ret = NULL; |
| 126 | |
| 127 | /* |
| 128 | * reallocate the string if it was grown last time (i.e., is no |
| 129 | * longer CONFIG_BUF_LEN); we malloc the new strings first, so |
| 130 | * that if either of the mallocs fail, we can fall back on the |
| 131 | * existing buffer allocations |
| 132 | */ |
| 133 | |
| 134 | if (configBufLen != CONFIG_BUF_LEN) { |
| 135 | |
| 136 | tmpConfigBuf = malloc(CONFIG_BUF_LEN); |
| 137 | tmpConfigRBuf = malloc(CONFIG_BUF_LEN); |
| 138 | |
| 139 | if (!tmpConfigBuf || !tmpConfigRBuf) { |
| 140 | |
| 141 | /* |
| 142 | * at least one of the mallocs failed; keep the old buffers |
| 143 | * and free any partial allocations |
| 144 | */ |
| 145 | |
| 146 | free(tmpConfigBuf); |
| 147 | free(tmpConfigRBuf); |
| 148 | |
| 149 | } |
| 150 | else { |
| 151 | |
| 152 | /* |
| 153 | * malloc succeeded; free the old buffers and use the new |
| 154 | * buffers |
| 155 | */ |
| 156 | |
| 157 | configBufLen = CONFIG_BUF_LEN; |
| 158 | |
| 159 | free(configBuf); |
| 160 | free(configRBuf); |
| 161 | |
| 162 | configBuf = tmpConfigBuf; |
| 163 | configRBuf = tmpConfigRBuf; |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | /* read in another block of chars */ |
| 168 | |
| 169 | do { |
| 170 | ret = fgets(configBuf + pos, configBufLen - pos - 1, |
| 171 | configFiles[curFileIndex].file); |
| 172 | |
| 173 | if (!ret) { |
| 174 | /* |
| 175 | * if the file doesn't end in a newline, add one |
| 176 | * and trigger another read |
| 177 | */ |
| 178 | if (pos != 0) { |
| 179 | strcpy(&configBuf[pos], "\n"); |
| 180 | ret = configBuf; |
| 181 | } |
| 182 | else |
| 183 | break; |
| 184 | } |
| 185 | |
| 186 | /* search for EOL in the new block of chars */ |
| 187 | |
| 188 | for (i = pos; i < (configBufLen - 1); i++) { |
| 189 | c = configBuf[i]; |
| 190 | |
| 191 | if (c == '\0') |
| 192 | break; |
| 193 | |
| 194 | if ((c == '\n') || (c == '\r')) { |
| 195 | eolFound = 1; |
| 196 | break; |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | /* |
| 201 | * if we didn't find EOL, then grow the string and |
| 202 | * read in more |
| 203 | */ |
| 204 | |
| 205 | if (!eolFound) { |
| 206 | |
| 207 | tmpConfigBuf = realloc(configBuf, configBufLen + CONFIG_BUF_LEN); |
| 208 | tmpConfigRBuf = realloc(configRBuf, configBufLen + CONFIG_BUF_LEN); |
| 209 | |
| 210 | if (!tmpConfigBuf || !tmpConfigRBuf) { |
| 211 | |
| 212 | /* |
| 213 | * at least one of the reallocations failed; use the |
| 214 | * new allocation that succeeded, but we have to |
| 215 | * fallback to the previous configBufLen size and use |
| 216 | * the string we have, even though we don't have an |
| 217 | * EOL |
| 218 | */ |
| 219 | |
| 220 | if (tmpConfigBuf) |
| 221 | configBuf = tmpConfigBuf; |
| 222 | if (tmpConfigRBuf) |
| 223 | configRBuf = tmpConfigRBuf; |
| 224 | |
| 225 | break; |
| 226 | |
| 227 | } |
| 228 | else { |
| 229 | |
| 230 | /* reallocation succeeded */ |
| 231 | |
| 232 | configBuf = tmpConfigBuf; |
| 233 | configRBuf = tmpConfigRBuf; |
| 234 | pos = i; |
| 235 | configBufLen += CONFIG_BUF_LEN; |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | } while (!eolFound); |
| 240 | |
| 241 | return ret; |
| 242 | } |
| 243 | |
| 244 | /* |
| 245 | * xf86getToken -- |
| 246 | * Read next Token from the config file. Handle the global variable |
| 247 | * pushToken. |
| 248 | */ |
| 249 | int |
| 250 | xf86getToken(xf86ConfigSymTabRec * tab) |
| 251 | { |
| 252 | int c, i; |
| 253 | |
| 254 | /* |
| 255 | * First check whether pushToken has a different value than LOCK_TOKEN. |
| 256 | * In this case rBuf[] contains a valid STRING/TOKEN/NUMBER. But in the |
| 257 | * oth * case the next token must be read from the input. |
| 258 | */ |
| 259 | if (pushToken == EOF_TOKEN) |
| 260 | return EOF_TOKEN; |
| 261 | else if (pushToken == LOCK_TOKEN) { |
| 262 | /* |
| 263 | * eol_seen is only set for the first token after a newline. |
| 264 | */ |
| 265 | eol_seen = 0; |
| 266 | |
| 267 | c = configBuf[configPos]; |
| 268 | |
| 269 | /* |
| 270 | * Get start of next Token. EOF is handled, |
| 271 | * whitespaces are skipped. |
| 272 | */ |
| 273 | |
| 274 | again: |
| 275 | if (!c) { |
| 276 | char *ret; |
| 277 | |
| 278 | if (numFiles > 0) |
| 279 | ret = xf86getNextLine(); |
| 280 | else { |
| 281 | if (builtinConfig[builtinIndex] == NULL) |
| 282 | ret = NULL; |
| 283 | else { |
| 284 | strlcpy(configBuf, |
| 285 | builtinConfig[builtinIndex], CONFIG_BUF_LEN); |
| 286 | ret = configBuf; |
| 287 | builtinIndex++; |
| 288 | } |
| 289 | } |
| 290 | if (ret == NULL) { |
| 291 | /* |
| 292 | * if necessary, move to the next file and |
| 293 | * read the first line |
| 294 | */ |
| 295 | if (curFileIndex + 1 < numFiles) { |
| 296 | curFileIndex++; |
| 297 | configLineNo = 0; |
| 298 | goto again; |
| 299 | } |
| 300 | else |
| 301 | return pushToken = EOF_TOKEN; |
| 302 | } |
| 303 | configLineNo++; |
| 304 | configPos = 0; |
| 305 | eol_seen = 1; |
| 306 | } |
| 307 | |
| 308 | i = 0; |
| 309 | for (;;) { |
| 310 | c = configBuf[configPos++]; |
| 311 | configRBuf[i++] = c; |
| 312 | switch (c) { |
| 313 | case ' ': |
| 314 | case '\t': |
| 315 | case '\r': |
| 316 | continue; |
| 317 | case '\n': |
| 318 | i = 0; |
| 319 | continue; |
| 320 | } |
| 321 | break; |
| 322 | } |
| 323 | if (c == '\0') |
| 324 | goto again; |
| 325 | |
| 326 | if (c == '#') { |
| 327 | do { |
| 328 | configRBuf[i++] = (c = configBuf[configPos++]); |
| 329 | } |
| 330 | while ((c != '\n') && (c != '\r') && (c != '\0')); |
| 331 | configRBuf[i] = '\0'; |
| 332 | /* XXX no private copy. |
| 333 | * Use xf86addComment when setting a comment. |
| 334 | */ |
| 335 | val.str = configRBuf; |
| 336 | return COMMENT; |
| 337 | } |
| 338 | |
| 339 | /* GJA -- handle '-' and ',' * Be careful: "-hsync" is a keyword. */ |
| 340 | else if ((c == ',') && !isalpha(configBuf[configPos])) { |
| 341 | return COMMA; |
| 342 | } |
| 343 | else if ((c == '-') && !isalpha(configBuf[configPos])) { |
| 344 | return DASH; |
| 345 | } |
| 346 | |
| 347 | /* |
| 348 | * Numbers are returned immediately ... |
| 349 | */ |
| 350 | if (isdigit(c)) { |
| 351 | int base; |
| 352 | |
| 353 | if (c == '0') |
| 354 | if ((configBuf[configPos] == 'x') || |
| 355 | (configBuf[configPos] == 'X')) { |
| 356 | base = 16; |
| 357 | val.numType = PARSE_HEX; |
| 358 | } |
| 359 | else { |
| 360 | base = 8; |
| 361 | val.numType = PARSE_OCTAL; |
| 362 | } |
| 363 | else { |
| 364 | base = 10; |
| 365 | val.numType = PARSE_DECIMAL; |
| 366 | } |
| 367 | |
| 368 | configRBuf[0] = c; |
| 369 | i = 1; |
| 370 | while (isdigit(c = configBuf[configPos++]) || |
| 371 | (c == '.') || (c == 'x') || (c == 'X') || |
| 372 | ((base == 16) && (((c >= 'a') && (c <= 'f')) || |
| 373 | ((c >= 'A') && (c <= 'F'))))) |
| 374 | configRBuf[i++] = c; |
| 375 | configPos--; /* GJA -- one too far */ |
| 376 | configRBuf[i] = '\0'; |
| 377 | val.num = strtoul(configRBuf, NULL, 0); |
| 378 | val.realnum = atof(configRBuf); |
| 379 | return NUMBER; |
| 380 | } |
| 381 | |
| 382 | /* |
| 383 | * All Strings START with a \" ... |
| 384 | */ |
| 385 | else if (c == '\"') { |
| 386 | i = -1; |
| 387 | do { |
| 388 | configRBuf[++i] = (c = configBuf[configPos++]); |
| 389 | } |
| 390 | while ((c != '\"') && (c != '\n') && (c != '\r') && (c != '\0')); |
| 391 | configRBuf[i] = '\0'; |
| 392 | val.str = malloc(strlen(configRBuf) + 1); |
| 393 | strcpy(val.str, configRBuf); /* private copy ! */ |
| 394 | return STRING; |
| 395 | } |
| 396 | |
| 397 | /* |
| 398 | * ... and now we MUST have a valid token. The search is |
| 399 | * handled later along with the pushed tokens. |
| 400 | */ |
| 401 | else { |
| 402 | configRBuf[0] = c; |
| 403 | i = 0; |
| 404 | do { |
| 405 | configRBuf[++i] = (c = configBuf[configPos++]); |
| 406 | } |
| 407 | while ((c != ' ') && (c != '\t') && (c != '\n') && (c != '\r') && |
| 408 | (c != '\0') && (c != '#')); |
| 409 | --configPos; |
| 410 | configRBuf[i] = '\0'; |
| 411 | i = 0; |
| 412 | } |
| 413 | |
| 414 | } |
| 415 | else { |
| 416 | |
| 417 | /* |
| 418 | * Here we deal with pushed tokens. Reinitialize pushToken again. If |
| 419 | * the pushed token was NUMBER || STRING return them again ... |
| 420 | */ |
| 421 | int temp = pushToken; |
| 422 | |
| 423 | pushToken = LOCK_TOKEN; |
| 424 | |
| 425 | if (temp == COMMA || temp == DASH) |
| 426 | return temp; |
| 427 | if (temp == NUMBER || temp == STRING) |
| 428 | return temp; |
| 429 | } |
| 430 | |
| 431 | /* |
| 432 | * Joop, at last we have to lookup the token ... |
| 433 | */ |
| 434 | if (tab) { |
| 435 | i = 0; |
| 436 | while (tab[i].token != -1) |
| 437 | if (xf86nameCompare(configRBuf, tab[i].name) == 0) |
| 438 | return tab[i].token; |
| 439 | else |
| 440 | i++; |
| 441 | } |
| 442 | |
| 443 | return ERROR_TOKEN; /* Error catcher */ |
| 444 | } |
| 445 | |
| 446 | int |
| 447 | xf86getSubToken(char **comment) |
| 448 | { |
| 449 | int token; |
| 450 | |
| 451 | for (;;) { |
| 452 | token = xf86getToken(NULL); |
| 453 | if (token == COMMENT) { |
| 454 | if (comment) |
| 455 | *comment = xf86addComment(*comment, val.str); |
| 456 | } |
| 457 | else |
| 458 | return token; |
| 459 | } |
| 460 | /*NOTREACHED*/} |
| 461 | |
| 462 | int |
| 463 | xf86getSubTokenWithTab(char **comment, xf86ConfigSymTabRec * tab) |
| 464 | { |
| 465 | int token; |
| 466 | |
| 467 | for (;;) { |
| 468 | token = xf86getToken(tab); |
| 469 | if (token == COMMENT) { |
| 470 | if (comment) |
| 471 | *comment = xf86addComment(*comment, val.str); |
| 472 | } |
| 473 | else |
| 474 | return token; |
| 475 | } |
| 476 | /*NOTREACHED*/} |
| 477 | |
| 478 | void |
| 479 | xf86unGetToken(int token) |
| 480 | { |
| 481 | pushToken = token; |
| 482 | } |
| 483 | |
| 484 | char * |
| 485 | xf86tokenString(void) |
| 486 | { |
| 487 | return configRBuf; |
| 488 | } |
| 489 | |
| 490 | int |
| 491 | xf86pathIsAbsolute(const char *path) |
| 492 | { |
| 493 | if (path && path[0] == '/') |
| 494 | return 1; |
| 495 | return 0; |
| 496 | } |
| 497 | |
| 498 | /* A path is "safe" if it is relative and if it contains no ".." elements. */ |
| 499 | int |
| 500 | xf86pathIsSafe(const char *path) |
| 501 | { |
| 502 | if (xf86pathIsAbsolute(path)) |
| 503 | return 0; |
| 504 | |
| 505 | /* Compare with ".." */ |
| 506 | if (!strcmp(path, "..")) |
| 507 | return 0; |
| 508 | |
| 509 | /* Look for leading "../" */ |
| 510 | if (!strncmp(path, "../", 3)) |
| 511 | return 0; |
| 512 | |
| 513 | /* Look for trailing "/.." */ |
| 514 | if ((strlen(path) > 3) && !strcmp(path + strlen(path) - 3, "/..")) |
| 515 | return 0; |
| 516 | |
| 517 | /* Look for "/../" */ |
| 518 | if (strstr(path, "/../")) |
| 519 | return 0; |
| 520 | |
| 521 | return 1; |
| 522 | } |
| 523 | |
| 524 | /* |
| 525 | * This function substitutes the following escape sequences: |
| 526 | * |
| 527 | * %A cmdline argument as an absolute path (must be absolute to match) |
| 528 | * %R cmdline argument as a relative path |
| 529 | * %S cmdline argument as a "safe" path (relative, and no ".." elements) |
| 530 | * %X default config file name ("xorg.conf") |
| 531 | * %H hostname |
| 532 | * %E config file environment ($XORGCONFIG) as an absolute path |
| 533 | * %F config file environment ($XORGCONFIG) as a relative path |
| 534 | * %G config file environment ($XORGCONFIG) as a safe path |
| 535 | * %P projroot |
| 536 | * %C sysconfdir |
| 537 | * %D datadir |
| 538 | * %% % |
| 539 | */ |
| 540 | |
| 541 | #ifndef XCONFIGFILE |
| 542 | #define XCONFIGFILE "xorg.conf" |
| 543 | #endif |
| 544 | #ifndef XCONFIGDIR |
| 545 | #define XCONFIGDIR "xorg.conf.d" |
| 546 | #endif |
| 547 | #ifndef XCONFIGSUFFIX |
| 548 | #define XCONFIGSUFFIX ".conf" |
| 549 | #endif |
| 550 | #ifndef PROJECTROOT |
| 551 | #define PROJECTROOT "/usr/X11R6" |
| 552 | #endif |
| 553 | #ifndef SYSCONFDIR |
| 554 | #define SYSCONFDIR PROJECTROOT "/etc" |
| 555 | #endif |
| 556 | #ifndef DATADIR |
| 557 | #define DATADIR PROJECTROOT "/share" |
| 558 | #endif |
| 559 | #ifndef XCONFENV |
| 560 | #define XCONFENV "XORGCONFIG" |
| 561 | #endif |
| 562 | |
| 563 | #define BAIL_OUT do { \ |
| 564 | free(result); \ |
| 565 | return NULL; \ |
| 566 | } while (0) |
| 567 | |
| 568 | #define CHECK_LENGTH do { \ |
| 569 | if (l > PATH_MAX) { \ |
| 570 | BAIL_OUT; \ |
| 571 | } \ |
| 572 | } while (0) |
| 573 | |
| 574 | #define APPEND_STR(s) do { \ |
| 575 | if (strlen(s) + l > PATH_MAX) { \ |
| 576 | BAIL_OUT; \ |
| 577 | } else { \ |
| 578 | strcpy(result + l, s); \ |
| 579 | l += strlen(s); \ |
| 580 | } \ |
| 581 | } while (0) |
| 582 | |
| 583 | static char * |
| 584 | DoSubstitution(const char *template, const char *cmdline, const char *projroot, |
| 585 | int *cmdlineUsed, int *envUsed, const char *XConfigFile) |
| 586 | { |
| 587 | char *result; |
| 588 | int i, l; |
| 589 | static const char *env = NULL; |
| 590 | static char *hostname = NULL; |
| 591 | |
| 592 | if (!template) |
| 593 | return NULL; |
| 594 | |
| 595 | if (cmdlineUsed) |
| 596 | *cmdlineUsed = 0; |
| 597 | if (envUsed) |
| 598 | *envUsed = 0; |
| 599 | |
| 600 | result = malloc(PATH_MAX + 1); |
| 601 | l = 0; |
| 602 | for (i = 0; template[i]; i++) { |
| 603 | if (template[i] != '%') { |
| 604 | result[l++] = template[i]; |
| 605 | CHECK_LENGTH; |
| 606 | } |
| 607 | else { |
| 608 | switch (template[++i]) { |
| 609 | case 'A': |
| 610 | if (cmdline && xf86pathIsAbsolute(cmdline)) { |
| 611 | APPEND_STR(cmdline); |
| 612 | if (cmdlineUsed) |
| 613 | *cmdlineUsed = 1; |
| 614 | } |
| 615 | else |
| 616 | BAIL_OUT; |
| 617 | break; |
| 618 | case 'R': |
| 619 | if (cmdline && !xf86pathIsAbsolute(cmdline)) { |
| 620 | APPEND_STR(cmdline); |
| 621 | if (cmdlineUsed) |
| 622 | *cmdlineUsed = 1; |
| 623 | } |
| 624 | else |
| 625 | BAIL_OUT; |
| 626 | break; |
| 627 | case 'S': |
| 628 | if (cmdline && xf86pathIsSafe(cmdline)) { |
| 629 | APPEND_STR(cmdline); |
| 630 | if (cmdlineUsed) |
| 631 | *cmdlineUsed = 1; |
| 632 | } |
| 633 | else |
| 634 | BAIL_OUT; |
| 635 | break; |
| 636 | case 'X': |
| 637 | APPEND_STR(XConfigFile); |
| 638 | break; |
| 639 | case 'H': |
| 640 | if (!hostname) { |
| 641 | if ((hostname = malloc(MAXHOSTNAMELEN + 1))) { |
| 642 | if (gethostname(hostname, MAXHOSTNAMELEN) == 0) { |
| 643 | hostname[MAXHOSTNAMELEN] = '\0'; |
| 644 | } |
| 645 | else { |
| 646 | free(hostname); |
| 647 | hostname = NULL; |
| 648 | } |
| 649 | } |
| 650 | } |
| 651 | if (hostname) |
| 652 | APPEND_STR(hostname); |
| 653 | break; |
| 654 | case 'E': |
| 655 | if (!env) |
| 656 | env = getenv(XCONFENV); |
| 657 | if (env && xf86pathIsAbsolute(env)) { |
| 658 | APPEND_STR(env); |
| 659 | if (envUsed) |
| 660 | *envUsed = 1; |
| 661 | } |
| 662 | else |
| 663 | BAIL_OUT; |
| 664 | break; |
| 665 | case 'F': |
| 666 | if (!env) |
| 667 | env = getenv(XCONFENV); |
| 668 | if (env && !xf86pathIsAbsolute(env)) { |
| 669 | APPEND_STR(env); |
| 670 | if (envUsed) |
| 671 | *envUsed = 1; |
| 672 | } |
| 673 | else |
| 674 | BAIL_OUT; |
| 675 | break; |
| 676 | case 'G': |
| 677 | if (!env) |
| 678 | env = getenv(XCONFENV); |
| 679 | if (env && xf86pathIsSafe(env)) { |
| 680 | APPEND_STR(env); |
| 681 | if (envUsed) |
| 682 | *envUsed = 1; |
| 683 | } |
| 684 | else |
| 685 | BAIL_OUT; |
| 686 | break; |
| 687 | case 'P': |
| 688 | if (projroot && xf86pathIsAbsolute(projroot)) |
| 689 | APPEND_STR(projroot); |
| 690 | else |
| 691 | BAIL_OUT; |
| 692 | break; |
| 693 | case 'C': |
| 694 | APPEND_STR(SYSCONFDIR); |
| 695 | break; |
| 696 | case 'D': |
| 697 | APPEND_STR(DATADIR); |
| 698 | break; |
| 699 | case '%': |
| 700 | result[l++] = '%'; |
| 701 | CHECK_LENGTH; |
| 702 | break; |
| 703 | default: |
| 704 | fprintf(stderr, "invalid escape %%%c found in path template\n", |
| 705 | template[i]); |
| 706 | BAIL_OUT; |
| 707 | break; |
| 708 | } |
| 709 | } |
| 710 | } |
| 711 | #ifdef DEBUG |
| 712 | fprintf(stderr, "Converted `%s' to `%s'\n", template, result); |
| 713 | #endif |
| 714 | return result; |
| 715 | } |
| 716 | |
| 717 | /* |
| 718 | * Given some searching parameters, locate and open the xorg config file. |
| 719 | */ |
| 720 | static char * |
| 721 | OpenConfigFile(const char *path, const char *cmdline, const char *projroot, |
| 722 | const char *confname) |
| 723 | { |
| 724 | char *filepath = NULL; |
| 725 | char *pathcopy; |
| 726 | const char *template; |
| 727 | int cmdlineUsed = 0; |
| 728 | FILE *file = NULL; |
| 729 | |
| 730 | pathcopy = strdup(path); |
| 731 | for (template = strtok(pathcopy, ","); template && !file; |
| 732 | template = strtok(NULL, ",")) { |
| 733 | filepath = DoSubstitution(template, cmdline, projroot, |
| 734 | &cmdlineUsed, NULL, confname); |
| 735 | if (!filepath) |
| 736 | continue; |
| 737 | if (cmdline && !cmdlineUsed) { |
| 738 | free(filepath); |
| 739 | filepath = NULL; |
| 740 | continue; |
| 741 | } |
| 742 | file = fopen(filepath, "r"); |
| 743 | if (!file) { |
| 744 | free(filepath); |
| 745 | filepath = NULL; |
| 746 | } |
| 747 | } |
| 748 | |
| 749 | free(pathcopy); |
| 750 | if (file) { |
| 751 | configFiles[numFiles].file = file; |
| 752 | configFiles[numFiles].path = strdup(filepath); |
| 753 | numFiles++; |
| 754 | } |
| 755 | return filepath; |
| 756 | } |
| 757 | |
| 758 | /* |
| 759 | * Match non-hidden files in the xorg config directory with a .conf |
| 760 | * suffix. This filter is passed to scandir(3). |
| 761 | */ |
| 762 | static int |
| 763 | ConfigFilter(const struct dirent *de) |
| 764 | { |
| 765 | const char *name = de->d_name; |
| 766 | size_t len; |
| 767 | size_t suflen = strlen(XCONFIGSUFFIX); |
| 768 | |
| 769 | if (!name || name[0] == '.') |
| 770 | return 0; |
| 771 | len = strlen(name); |
| 772 | if (len <= suflen) |
| 773 | return 0; |
| 774 | if (strcmp(&name[len - suflen], XCONFIGSUFFIX) != 0) |
| 775 | return 0; |
| 776 | return 1; |
| 777 | } |
| 778 | |
| 779 | static Bool |
| 780 | AddConfigDirFiles(const char *dirpath, struct dirent **list, int num) |
| 781 | { |
| 782 | int i; |
| 783 | Bool openedFile = FALSE; |
| 784 | Bool warnOnce = FALSE; |
| 785 | |
| 786 | for (i = 0; i < num; i++) { |
| 787 | char *path; |
| 788 | FILE *file; |
| 789 | |
| 790 | if (numFiles >= CONFIG_MAX_FILES) { |
| 791 | if (!warnOnce) { |
| 792 | ErrorF("Maximum number of configuration " "files opened\n"); |
| 793 | warnOnce = TRUE; |
| 794 | } |
| 795 | continue; |
| 796 | } |
| 797 | |
| 798 | path = malloc(PATH_MAX + 1); |
| 799 | snprintf(path, PATH_MAX + 1, "%s/%s", dirpath, list[i]->d_name); |
| 800 | file = fopen(path, "r"); |
| 801 | if (!file) { |
| 802 | free(path); |
| 803 | continue; |
| 804 | } |
| 805 | openedFile = TRUE; |
| 806 | |
| 807 | configFiles[numFiles].file = file; |
| 808 | configFiles[numFiles].path = path; |
| 809 | numFiles++; |
| 810 | } |
| 811 | |
| 812 | return openedFile; |
| 813 | } |
| 814 | |
| 815 | /* |
| 816 | * Given some searching parameters, locate and open the xorg config |
| 817 | * directory. The directory does not need to contain config files. |
| 818 | */ |
| 819 | static char * |
| 820 | OpenConfigDir(const char *path, const char *cmdline, const char *projroot, |
| 821 | const char *confname) |
| 822 | { |
| 823 | char *dirpath, *pathcopy; |
| 824 | const char *template; |
| 825 | Bool found = FALSE; |
| 826 | int cmdlineUsed = 0; |
| 827 | |
| 828 | pathcopy = strdup(path); |
| 829 | for (template = strtok(pathcopy, ","); template && !found; |
| 830 | template = strtok(NULL, ",")) { |
| 831 | struct dirent **list = NULL; |
| 832 | int num; |
| 833 | |
| 834 | dirpath = DoSubstitution(template, cmdline, projroot, |
| 835 | &cmdlineUsed, NULL, confname); |
| 836 | if (!dirpath) |
| 837 | continue; |
| 838 | if (cmdline && !cmdlineUsed) { |
| 839 | free(dirpath); |
| 840 | dirpath = NULL; |
| 841 | continue; |
| 842 | } |
| 843 | |
| 844 | /* match files named *.conf */ |
| 845 | num = scandir(dirpath, &list, ConfigFilter, alphasort); |
| 846 | if (num < 0) { |
| 847 | list = NULL; |
| 848 | num = 0; |
| 849 | } |
| 850 | found = AddConfigDirFiles(dirpath, list, num); |
| 851 | if (!found) { |
| 852 | free(dirpath); |
| 853 | dirpath = NULL; |
| 854 | } |
| 855 | while (num--) |
| 856 | free(list[num]); |
| 857 | free(list); |
| 858 | } |
| 859 | |
| 860 | free(pathcopy); |
| 861 | return dirpath; |
| 862 | } |
| 863 | |
| 864 | /* |
| 865 | * xf86initConfigFiles -- Setup global variables and buffers. |
| 866 | */ |
| 867 | void |
| 868 | xf86initConfigFiles(void) |
| 869 | { |
| 870 | curFileIndex = 0; |
| 871 | configPos = 0; |
| 872 | configLineNo = 0; |
| 873 | pushToken = LOCK_TOKEN; |
| 874 | |
| 875 | configBuf = malloc(CONFIG_BUF_LEN); |
| 876 | configRBuf = malloc(CONFIG_BUF_LEN); |
| 877 | configBuf[0] = '\0'; /* sanity ... */ |
| 878 | } |
| 879 | |
| 880 | /* |
| 881 | * xf86openConfigFile -- |
| 882 | * |
| 883 | * This function take a config file search path (optional), a command-line |
| 884 | * specified file name (optional) and the ProjectRoot path (optional) and |
| 885 | * locates and opens a config file based on that information. If a |
| 886 | * command-line file name is specified, then this function fails if none |
| 887 | * of the located files. |
| 888 | * |
| 889 | * The return value is a pointer to the actual name of the file that was |
| 890 | * opened. When no file is found, the return value is NULL. The caller should |
| 891 | * free() the returned value. |
| 892 | * |
| 893 | * The escape sequences allowed in the search path are defined above. |
| 894 | * |
| 895 | */ |
| 896 | |
| 897 | #ifndef DEFAULT_CONF_PATH |
| 898 | #define DEFAULT_CONF_PATH "/etc/X11/%S," \ |
| 899 | "%P/etc/X11/%S," \ |
| 900 | "/etc/X11/%G," \ |
| 901 | "%P/etc/X11/%G," \ |
| 902 | "/etc/X11/%X-%M," \ |
| 903 | "/etc/X11/%X," \ |
| 904 | "/etc/%X," \ |
| 905 | "%P/etc/X11/%X.%H," \ |
| 906 | "%P/etc/X11/%X-%M," \ |
| 907 | "%P/etc/X11/%X," \ |
| 908 | "%P/lib/X11/%X.%H," \ |
| 909 | "%P/lib/X11/%X-%M," \ |
| 910 | "%P/lib/X11/%X" |
| 911 | #endif |
| 912 | |
| 913 | char * |
| 914 | xf86openConfigFile(const char *path, const char *cmdline, const char *projroot) |
| 915 | { |
| 916 | if (!path || !path[0]) |
| 917 | path = DEFAULT_CONF_PATH; |
| 918 | if (!projroot || !projroot[0]) |
| 919 | projroot = PROJECTROOT; |
| 920 | |
| 921 | /* Search for a config file */ |
| 922 | return OpenConfigFile(path, cmdline, projroot, XCONFIGFILE); |
| 923 | } |
| 924 | |
| 925 | /* |
| 926 | * xf86openConfigDirFiles -- |
| 927 | * |
| 928 | * This function take a config directory search path (optional), a |
| 929 | * command-line specified directory name (optional) and the ProjectRoot path |
| 930 | * (optional) and locates and opens a config directory based on that |
| 931 | * information. If a command-line name is specified, then this function |
| 932 | * fails if it is not found. |
| 933 | * |
| 934 | * The return value is a pointer to the actual name of the direcoty that was |
| 935 | * opened. When no directory is found, the return value is NULL. The caller |
| 936 | * should free() the returned value. |
| 937 | * |
| 938 | * The escape sequences allowed in the search path are defined above. |
| 939 | * |
| 940 | */ |
| 941 | char * |
| 942 | xf86openConfigDirFiles(const char *path, const char *cmdline, |
| 943 | const char *projroot) |
| 944 | { |
| 945 | if (!path || !path[0]) |
| 946 | path = DEFAULT_CONF_PATH; |
| 947 | if (!projroot || !projroot[0]) |
| 948 | projroot = PROJECTROOT; |
| 949 | |
| 950 | /* Search for the multiconf directory */ |
| 951 | return OpenConfigDir(path, cmdline, projroot, XCONFIGDIR); |
| 952 | } |
| 953 | |
| 954 | void |
| 955 | xf86closeConfigFile(void) |
| 956 | { |
| 957 | int i; |
| 958 | |
| 959 | free(configRBuf); |
| 960 | configRBuf = NULL; |
| 961 | free(configBuf); |
| 962 | configBuf = NULL; |
| 963 | |
| 964 | if (numFiles == 0) { |
| 965 | builtinConfig = NULL; |
| 966 | builtinIndex = 0; |
| 967 | } |
| 968 | for (i = 0; i < numFiles; i++) { |
| 969 | fclose(configFiles[i].file); |
| 970 | configFiles[i].file = NULL; |
| 971 | free(configFiles[i].path); |
| 972 | configFiles[i].path = NULL; |
| 973 | } |
| 974 | numFiles = 0; |
| 975 | } |
| 976 | |
| 977 | void |
| 978 | xf86setBuiltinConfig(const char *config[]) |
| 979 | { |
| 980 | builtinConfig = config; |
| 981 | } |
| 982 | |
| 983 | void |
| 984 | xf86parseError(const char *format, ...) |
| 985 | { |
| 986 | va_list ap; |
| 987 | const char *filename = numFiles ? configFiles[curFileIndex].path |
| 988 | : "<builtin configuration>"; |
| 989 | |
| 990 | ErrorF("Parse error on line %d of section %s in file %s\n\t", |
| 991 | configLineNo, configSection, filename); |
| 992 | va_start(ap, format); |
| 993 | VErrorF(format, ap); |
| 994 | va_end(ap); |
| 995 | |
| 996 | ErrorF("\n"); |
| 997 | } |
| 998 | |
| 999 | void |
| 1000 | xf86validationError(const char *format, ...) |
| 1001 | { |
| 1002 | va_list ap; |
| 1003 | const char *filename = numFiles ? configFiles[curFileIndex].path |
| 1004 | : "<builtin configuration>"; |
| 1005 | |
| 1006 | ErrorF("Data incomplete in file %s\n\t", filename); |
| 1007 | va_start(ap, format); |
| 1008 | VErrorF(format, ap); |
| 1009 | va_end(ap); |
| 1010 | |
| 1011 | ErrorF("\n"); |
| 1012 | } |
| 1013 | |
| 1014 | void |
| 1015 | xf86setSection(const char *section) |
| 1016 | { |
| 1017 | free(configSection); |
| 1018 | configSection = strdup(section); |
| 1019 | } |
| 1020 | |
| 1021 | /* |
| 1022 | * xf86getToken -- |
| 1023 | * Lookup a string if it is actually a token in disguise. |
| 1024 | */ |
| 1025 | int |
| 1026 | xf86getStringToken(xf86ConfigSymTabRec * tab) |
| 1027 | { |
| 1028 | return StringToToken(val.str, tab); |
| 1029 | } |
| 1030 | |
| 1031 | static int |
| 1032 | StringToToken(const char *str, xf86ConfigSymTabRec * tab) |
| 1033 | { |
| 1034 | int i; |
| 1035 | |
| 1036 | for (i = 0; tab[i].token != -1; i++) { |
| 1037 | if (!xf86nameCompare(tab[i].name, str)) |
| 1038 | return tab[i].token; |
| 1039 | } |
| 1040 | return ERROR_TOKEN; |
| 1041 | } |
| 1042 | |
| 1043 | /* |
| 1044 | * Compare two names. The characters '_', ' ', and '\t' are ignored |
| 1045 | * in the comparison. |
| 1046 | */ |
| 1047 | int |
| 1048 | xf86nameCompare(const char *s1, const char *s2) |
| 1049 | { |
| 1050 | char c1, c2; |
| 1051 | |
| 1052 | if (!s1 || *s1 == 0) { |
| 1053 | if (!s2 || *s2 == 0) |
| 1054 | return 0; |
| 1055 | else |
| 1056 | return 1; |
| 1057 | } |
| 1058 | |
| 1059 | while (*s1 == '_' || *s1 == ' ' || *s1 == '\t') |
| 1060 | s1++; |
| 1061 | while (*s2 == '_' || *s2 == ' ' || *s2 == '\t') |
| 1062 | s2++; |
| 1063 | c1 = (isupper(*s1) ? tolower(*s1) : *s1); |
| 1064 | c2 = (isupper(*s2) ? tolower(*s2) : *s2); |
| 1065 | while (c1 == c2) { |
| 1066 | if (c1 == '\0') |
| 1067 | return 0; |
| 1068 | s1++; |
| 1069 | s2++; |
| 1070 | while (*s1 == '_' || *s1 == ' ' || *s1 == '\t') |
| 1071 | s1++; |
| 1072 | while (*s2 == '_' || *s2 == ' ' || *s2 == '\t') |
| 1073 | s2++; |
| 1074 | c1 = (isupper(*s1) ? tolower(*s1) : *s1); |
| 1075 | c2 = (isupper(*s2) ? tolower(*s2) : *s2); |
| 1076 | } |
| 1077 | return c1 - c2; |
| 1078 | } |
| 1079 | |
| 1080 | char * |
| 1081 | xf86addComment(char *cur, char *add) |
| 1082 | { |
| 1083 | char *str; |
| 1084 | int len, curlen, iscomment, hasnewline = 0, insnewline, endnewline; |
| 1085 | |
| 1086 | if (add == NULL || add[0] == '\0') |
| 1087 | return cur; |
| 1088 | |
| 1089 | if (cur) { |
| 1090 | curlen = strlen(cur); |
| 1091 | if (curlen) |
| 1092 | hasnewline = cur[curlen - 1] == '\n'; |
| 1093 | eol_seen = 0; |
| 1094 | } |
| 1095 | else |
| 1096 | curlen = 0; |
| 1097 | |
| 1098 | str = add; |
| 1099 | iscomment = 0; |
| 1100 | while (*str) { |
| 1101 | if (*str != ' ' && *str != '\t') |
| 1102 | break; |
| 1103 | ++str; |
| 1104 | } |
| 1105 | iscomment = (*str == '#'); |
| 1106 | |
| 1107 | len = strlen(add); |
| 1108 | endnewline = add[len - 1] == '\n'; |
| 1109 | |
| 1110 | insnewline = eol_seen || (curlen && !hasnewline); |
| 1111 | if (insnewline) |
| 1112 | len++; |
| 1113 | if (!iscomment) |
| 1114 | len++; |
| 1115 | if (!endnewline) |
| 1116 | len++; |
| 1117 | |
| 1118 | /* Allocate + 1 char for '\0' terminator. */ |
| 1119 | str = realloc(cur, curlen + len + 1); |
| 1120 | if (!str) |
| 1121 | return cur; |
| 1122 | |
| 1123 | cur = str; |
| 1124 | |
| 1125 | if (insnewline) |
| 1126 | cur[curlen++] = '\n'; |
| 1127 | if (!iscomment) |
| 1128 | cur[curlen++] = '#'; |
| 1129 | strcpy(cur + curlen, add); |
| 1130 | if (!endnewline) |
| 1131 | strcat(cur, "\n"); |
| 1132 | |
| 1133 | return cur; |
| 1134 | } |
| 1135 | |
| 1136 | Bool |
| 1137 | xf86getBoolValue(Bool *val, const char *str) |
| 1138 | { |
| 1139 | if (!val || !str) |
| 1140 | return FALSE; |
| 1141 | if (*str == '\0') { |
| 1142 | *val = TRUE; |
| 1143 | } |
| 1144 | else { |
| 1145 | if (xf86nameCompare(str, "1") == 0) |
| 1146 | *val = TRUE; |
| 1147 | else if (xf86nameCompare(str, "on") == 0) |
| 1148 | *val = TRUE; |
| 1149 | else if (xf86nameCompare(str, "true") == 0) |
| 1150 | *val = TRUE; |
| 1151 | else if (xf86nameCompare(str, "yes") == 0) |
| 1152 | *val = TRUE; |
| 1153 | else if (xf86nameCompare(str, "0") == 0) |
| 1154 | *val = FALSE; |
| 1155 | else if (xf86nameCompare(str, "off") == 0) |
| 1156 | *val = FALSE; |
| 1157 | else if (xf86nameCompare(str, "false") == 0) |
| 1158 | *val = FALSE; |
| 1159 | else if (xf86nameCompare(str, "no") == 0) |
| 1160 | *val = FALSE; |
| 1161 | else |
| 1162 | return FALSE; |
| 1163 | } |
| 1164 | return TRUE; |
| 1165 | } |