Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* conf_mod.c */ |
| 2 | /* Written by Stephen Henson (steve@openssl.org) for the OpenSSL |
| 3 | * project 2001. |
| 4 | */ |
| 5 | /* ==================================================================== |
| 6 | * Copyright (c) 2001 The OpenSSL Project. All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in |
| 17 | * the documentation and/or other materials provided with the |
| 18 | * distribution. |
| 19 | * |
| 20 | * 3. All advertising materials mentioning features or use of this |
| 21 | * software must display the following acknowledgment: |
| 22 | * "This product includes software developed by the OpenSSL Project |
| 23 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
| 24 | * |
| 25 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| 26 | * endorse or promote products derived from this software without |
| 27 | * prior written permission. For written permission, please contact |
| 28 | * licensing@OpenSSL.org. |
| 29 | * |
| 30 | * 5. Products derived from this software may not be called "OpenSSL" |
| 31 | * nor may "OpenSSL" appear in their names without prior written |
| 32 | * permission of the OpenSSL Project. |
| 33 | * |
| 34 | * 6. Redistributions of any form whatsoever must retain the following |
| 35 | * acknowledgment: |
| 36 | * "This product includes software developed by the OpenSSL Project |
| 37 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
| 38 | * |
| 39 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| 40 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 41 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 42 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| 43 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 45 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 46 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 48 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 49 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 50 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 51 | * ==================================================================== |
| 52 | * |
| 53 | * This product includes cryptographic software written by Eric Young |
| 54 | * (eay@cryptsoft.com). This product includes software written by Tim |
| 55 | * Hudson (tjh@cryptsoft.com). |
| 56 | * |
| 57 | */ |
| 58 | |
| 59 | #include <stdio.h> |
| 60 | #include <ctype.h> |
| 61 | #include <openssl/crypto.h> |
| 62 | #include "cryptlib.h" |
| 63 | #include <openssl/conf.h> |
| 64 | #include <openssl/dso.h> |
| 65 | #include <openssl/x509.h> |
| 66 | |
| 67 | |
| 68 | #define DSO_mod_init_name "OPENSSL_init" |
| 69 | #define DSO_mod_finish_name "OPENSSL_finish" |
| 70 | |
| 71 | |
| 72 | /* This structure contains a data about supported modules. |
| 73 | * entries in this table correspond to either dynamic or |
| 74 | * static modules. |
| 75 | */ |
| 76 | |
| 77 | struct conf_module_st |
| 78 | { |
| 79 | /* DSO of this module or NULL if static */ |
| 80 | DSO *dso; |
| 81 | /* Name of the module */ |
| 82 | char *name; |
| 83 | /* Init function */ |
| 84 | conf_init_func *init; |
| 85 | /* Finish function */ |
| 86 | conf_finish_func *finish; |
| 87 | /* Number of successfully initialized modules */ |
| 88 | int links; |
| 89 | void *usr_data; |
| 90 | }; |
| 91 | |
| 92 | |
| 93 | /* This structure contains information about modules that have been |
| 94 | * successfully initialized. There may be more than one entry for a |
| 95 | * given module. |
| 96 | */ |
| 97 | |
| 98 | struct conf_imodule_st |
| 99 | { |
| 100 | CONF_MODULE *pmod; |
| 101 | char *name; |
| 102 | char *value; |
| 103 | unsigned long flags; |
| 104 | void *usr_data; |
| 105 | }; |
| 106 | |
| 107 | static STACK_OF(CONF_MODULE) *supported_modules = NULL; |
| 108 | static STACK_OF(CONF_IMODULE) *initialized_modules = NULL; |
| 109 | |
| 110 | static void module_free(CONF_MODULE *md); |
| 111 | static void module_finish(CONF_IMODULE *imod); |
| 112 | static int module_run(const CONF *cnf, char *name, char *value, |
| 113 | unsigned long flags); |
| 114 | static CONF_MODULE *module_add(DSO *dso, const char *name, |
| 115 | conf_init_func *ifunc, conf_finish_func *ffunc); |
| 116 | static CONF_MODULE *module_find(char *name); |
| 117 | static int module_init(CONF_MODULE *pmod, char *name, char *value, |
| 118 | const CONF *cnf); |
| 119 | static CONF_MODULE *module_load_dso(const CONF *cnf, char *name, char *value, |
| 120 | unsigned long flags); |
| 121 | |
| 122 | /* Main function: load modules from a CONF structure */ |
| 123 | |
| 124 | int CONF_modules_load(const CONF *cnf, const char *appname, |
| 125 | unsigned long flags) |
| 126 | { |
| 127 | STACK_OF(CONF_VALUE) *values; |
| 128 | CONF_VALUE *vl; |
| 129 | char *vsection = NULL; |
| 130 | |
| 131 | int ret, i; |
| 132 | |
| 133 | if (!cnf) |
| 134 | return 1; |
| 135 | |
| 136 | if (appname) |
| 137 | vsection = NCONF_get_string(cnf, NULL, appname); |
| 138 | |
| 139 | if (!appname || (!vsection && (flags & CONF_MFLAGS_DEFAULT_SECTION))) |
| 140 | vsection = NCONF_get_string(cnf, NULL, "openssl_conf"); |
| 141 | |
| 142 | if (!vsection) |
| 143 | { |
| 144 | ERR_clear_error(); |
| 145 | return 1; |
| 146 | } |
| 147 | |
| 148 | values = NCONF_get_section(cnf, vsection); |
| 149 | |
| 150 | if (!values) |
| 151 | return 0; |
| 152 | |
| 153 | for (i = 0; i < sk_CONF_VALUE_num(values); i++) |
| 154 | { |
| 155 | vl = sk_CONF_VALUE_value(values, i); |
| 156 | ret = module_run(cnf, vl->name, vl->value, flags); |
| 157 | if (ret <= 0) |
| 158 | if(!(flags & CONF_MFLAGS_IGNORE_ERRORS)) |
| 159 | return ret; |
| 160 | } |
| 161 | |
| 162 | return 1; |
| 163 | |
| 164 | } |
| 165 | |
| 166 | int CONF_modules_load_file(const char *filename, const char *appname, |
| 167 | unsigned long flags) |
| 168 | { |
| 169 | char *file = NULL; |
| 170 | CONF *conf = NULL; |
| 171 | int ret = 0; |
| 172 | conf = NCONF_new(NULL); |
| 173 | if (!conf) |
| 174 | goto err; |
| 175 | |
| 176 | if (filename == NULL) |
| 177 | { |
| 178 | file = CONF_get1_default_config_file(); |
| 179 | if (!file) |
| 180 | goto err; |
| 181 | } |
| 182 | else |
| 183 | file = (char *)filename; |
| 184 | |
| 185 | if (NCONF_load(conf, file, NULL) <= 0) |
| 186 | { |
| 187 | if ((flags & CONF_MFLAGS_IGNORE_MISSING_FILE) && |
| 188 | (ERR_GET_REASON(ERR_peek_last_error()) == CONF_R_NO_SUCH_FILE)) |
| 189 | { |
| 190 | ERR_clear_error(); |
| 191 | ret = 1; |
| 192 | } |
| 193 | goto err; |
| 194 | } |
| 195 | |
| 196 | ret = CONF_modules_load(conf, appname, flags); |
| 197 | |
| 198 | err: |
| 199 | if (filename == NULL) |
| 200 | OPENSSL_free(file); |
| 201 | NCONF_free(conf); |
| 202 | |
| 203 | return ret; |
| 204 | } |
| 205 | |
| 206 | static int module_run(const CONF *cnf, char *name, char *value, |
| 207 | unsigned long flags) |
| 208 | { |
| 209 | CONF_MODULE *md; |
| 210 | int ret; |
| 211 | |
| 212 | md = module_find(name); |
| 213 | |
| 214 | /* Module not found: try to load DSO */ |
| 215 | if (!md && !(flags & CONF_MFLAGS_NO_DSO)) |
| 216 | md = module_load_dso(cnf, name, value, flags); |
| 217 | |
| 218 | if (!md) |
| 219 | { |
| 220 | if (!(flags & CONF_MFLAGS_SILENT)) |
| 221 | { |
| 222 | CONFerr(CONF_F_MODULE_RUN, CONF_R_UNKNOWN_MODULE_NAME); |
| 223 | ERR_add_error_data(2, "module=", name); |
| 224 | } |
| 225 | return -1; |
| 226 | } |
| 227 | |
| 228 | ret = module_init(md, name, value, cnf); |
| 229 | |
| 230 | if (ret <= 0) |
| 231 | { |
| 232 | if (!(flags & CONF_MFLAGS_SILENT)) |
| 233 | { |
| 234 | char rcode[DECIMAL_SIZE(ret)+1]; |
| 235 | CONFerr(CONF_F_MODULE_RUN, CONF_R_MODULE_INITIALIZATION_ERROR); |
| 236 | BIO_snprintf(rcode, sizeof rcode, "%-8d", ret); |
| 237 | ERR_add_error_data(6, "module=", name, ", value=", value, ", retcode=", rcode); |
| 238 | } |
| 239 | } |
| 240 | |
| 241 | return ret; |
| 242 | } |
| 243 | |
| 244 | /* Load a module from a DSO */ |
| 245 | static CONF_MODULE *module_load_dso(const CONF *cnf, char *name, char *value, |
| 246 | unsigned long flags) |
| 247 | { |
| 248 | DSO *dso = NULL; |
| 249 | conf_init_func *ifunc; |
| 250 | conf_finish_func *ffunc; |
| 251 | char *path = NULL; |
| 252 | int errcode = 0; |
| 253 | CONF_MODULE *md; |
| 254 | /* Look for alternative path in module section */ |
| 255 | path = NCONF_get_string(cnf, value, "path"); |
| 256 | if (!path) |
| 257 | { |
| 258 | ERR_clear_error(); |
| 259 | path = name; |
| 260 | } |
| 261 | dso = DSO_load(NULL, path, NULL, 0); |
| 262 | if (!dso) |
| 263 | { |
| 264 | errcode = CONF_R_ERROR_LOADING_DSO; |
| 265 | goto err; |
| 266 | } |
| 267 | ifunc = (conf_init_func *)DSO_bind_func(dso, DSO_mod_init_name); |
| 268 | if (!ifunc) |
| 269 | { |
| 270 | errcode = CONF_R_MISSING_INIT_FUNCTION; |
| 271 | goto err; |
| 272 | } |
| 273 | ffunc = (conf_finish_func *)DSO_bind_func(dso, DSO_mod_finish_name); |
| 274 | /* All OK, add module */ |
| 275 | md = module_add(dso, name, ifunc, ffunc); |
| 276 | |
| 277 | if (!md) |
| 278 | goto err; |
| 279 | |
| 280 | return md; |
| 281 | |
| 282 | err: |
| 283 | if (dso) |
| 284 | DSO_free(dso); |
| 285 | CONFerr(CONF_F_MODULE_LOAD_DSO, errcode); |
| 286 | ERR_add_error_data(4, "module=", name, ", path=", path); |
| 287 | return NULL; |
| 288 | } |
| 289 | |
| 290 | /* add module to list */ |
| 291 | static CONF_MODULE *module_add(DSO *dso, const char *name, |
| 292 | conf_init_func *ifunc, conf_finish_func *ffunc) |
| 293 | { |
| 294 | CONF_MODULE *tmod = NULL; |
| 295 | if (supported_modules == NULL) |
| 296 | supported_modules = sk_CONF_MODULE_new_null(); |
| 297 | if (supported_modules == NULL) |
| 298 | return NULL; |
| 299 | tmod = OPENSSL_malloc(sizeof(CONF_MODULE)); |
| 300 | if (tmod == NULL) |
| 301 | return NULL; |
| 302 | |
| 303 | tmod->dso = dso; |
| 304 | tmod->name = BUF_strdup(name); |
| 305 | tmod->init = ifunc; |
| 306 | tmod->finish = ffunc; |
| 307 | tmod->links = 0; |
| 308 | |
| 309 | if (!sk_CONF_MODULE_push(supported_modules, tmod)) |
| 310 | { |
| 311 | OPENSSL_free(tmod); |
| 312 | return NULL; |
| 313 | } |
| 314 | |
| 315 | return tmod; |
| 316 | } |
| 317 | |
| 318 | /* Find a module from the list. We allow module names of the |
| 319 | * form modname.XXXX to just search for modname to allow the |
| 320 | * same module to be initialized more than once. |
| 321 | */ |
| 322 | |
| 323 | static CONF_MODULE *module_find(char *name) |
| 324 | { |
| 325 | CONF_MODULE *tmod; |
| 326 | int i, nchar; |
| 327 | char *p; |
| 328 | p = strrchr(name, '.'); |
| 329 | |
| 330 | if (p) |
| 331 | nchar = p - name; |
| 332 | else |
| 333 | nchar = strlen(name); |
| 334 | |
| 335 | for (i = 0; i < sk_CONF_MODULE_num(supported_modules); i++) |
| 336 | { |
| 337 | tmod = sk_CONF_MODULE_value(supported_modules, i); |
| 338 | if (!strncmp(tmod->name, name, nchar)) |
| 339 | return tmod; |
| 340 | } |
| 341 | |
| 342 | return NULL; |
| 343 | |
| 344 | } |
| 345 | |
| 346 | /* initialize a module */ |
| 347 | static int module_init(CONF_MODULE *pmod, char *name, char *value, |
| 348 | const CONF *cnf) |
| 349 | { |
| 350 | int ret = 1; |
| 351 | int init_called = 0; |
| 352 | CONF_IMODULE *imod = NULL; |
| 353 | |
| 354 | /* Otherwise add initialized module to list */ |
| 355 | imod = OPENSSL_malloc(sizeof(CONF_IMODULE)); |
| 356 | if (!imod) |
| 357 | goto err; |
| 358 | |
| 359 | imod->pmod = pmod; |
| 360 | imod->name = BUF_strdup(name); |
| 361 | imod->value = BUF_strdup(value); |
| 362 | imod->usr_data = NULL; |
| 363 | |
| 364 | if (!imod->name || !imod->value) |
| 365 | goto memerr; |
| 366 | |
| 367 | /* Try to initialize module */ |
| 368 | if(pmod->init) |
| 369 | { |
| 370 | ret = pmod->init(imod, cnf); |
| 371 | init_called = 1; |
| 372 | /* Error occurred, exit */ |
| 373 | if (ret <= 0) |
| 374 | goto err; |
| 375 | } |
| 376 | |
| 377 | if (initialized_modules == NULL) |
| 378 | { |
| 379 | initialized_modules = sk_CONF_IMODULE_new_null(); |
| 380 | if (!initialized_modules) |
| 381 | { |
| 382 | CONFerr(CONF_F_MODULE_INIT, ERR_R_MALLOC_FAILURE); |
| 383 | goto err; |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | if (!sk_CONF_IMODULE_push(initialized_modules, imod)) |
| 388 | { |
| 389 | CONFerr(CONF_F_MODULE_INIT, ERR_R_MALLOC_FAILURE); |
| 390 | goto err; |
| 391 | } |
| 392 | |
| 393 | pmod->links++; |
| 394 | |
| 395 | return ret; |
| 396 | |
| 397 | err: |
| 398 | |
| 399 | /* We've started the module so we'd better finish it */ |
| 400 | if (pmod->finish && init_called) |
| 401 | pmod->finish(imod); |
| 402 | |
| 403 | memerr: |
| 404 | if (imod) |
| 405 | { |
| 406 | if (imod->name) |
| 407 | OPENSSL_free(imod->name); |
| 408 | if (imod->value) |
| 409 | OPENSSL_free(imod->value); |
| 410 | OPENSSL_free(imod); |
| 411 | } |
| 412 | |
| 413 | return -1; |
| 414 | |
| 415 | } |
| 416 | |
| 417 | /* Unload any dynamic modules that have a link count of zero: |
| 418 | * i.e. have no active initialized modules. If 'all' is set |
| 419 | * then all modules are unloaded including static ones. |
| 420 | */ |
| 421 | |
| 422 | void CONF_modules_unload(int all) |
| 423 | { |
| 424 | int i; |
| 425 | CONF_MODULE *md; |
| 426 | CONF_modules_finish(); |
| 427 | /* unload modules in reverse order */ |
| 428 | for (i = sk_CONF_MODULE_num(supported_modules) - 1; i >= 0; i--) |
| 429 | { |
| 430 | md = sk_CONF_MODULE_value(supported_modules, i); |
| 431 | /* If static or in use and 'all' not set ignore it */ |
| 432 | if (((md->links > 0) || !md->dso) && !all) |
| 433 | continue; |
| 434 | /* Since we're working in reverse this is OK */ |
| 435 | (void)sk_CONF_MODULE_delete(supported_modules, i); |
| 436 | module_free(md); |
| 437 | } |
| 438 | if (sk_CONF_MODULE_num(supported_modules) == 0) |
| 439 | { |
| 440 | sk_CONF_MODULE_free(supported_modules); |
| 441 | supported_modules = NULL; |
| 442 | } |
| 443 | } |
| 444 | |
| 445 | /* unload a single module */ |
| 446 | static void module_free(CONF_MODULE *md) |
| 447 | { |
| 448 | if (md->dso) |
| 449 | DSO_free(md->dso); |
| 450 | OPENSSL_free(md->name); |
| 451 | OPENSSL_free(md); |
| 452 | } |
| 453 | |
| 454 | /* finish and free up all modules instances */ |
| 455 | |
| 456 | void CONF_modules_finish(void) |
| 457 | { |
| 458 | CONF_IMODULE *imod; |
| 459 | while (sk_CONF_IMODULE_num(initialized_modules) > 0) |
| 460 | { |
| 461 | imod = sk_CONF_IMODULE_pop(initialized_modules); |
| 462 | module_finish(imod); |
| 463 | } |
| 464 | sk_CONF_IMODULE_free(initialized_modules); |
| 465 | initialized_modules = NULL; |
| 466 | } |
| 467 | |
| 468 | /* finish a module instance */ |
| 469 | |
| 470 | static void module_finish(CONF_IMODULE *imod) |
| 471 | { |
| 472 | if (imod->pmod->finish) |
| 473 | imod->pmod->finish(imod); |
| 474 | imod->pmod->links--; |
| 475 | OPENSSL_free(imod->name); |
| 476 | OPENSSL_free(imod->value); |
| 477 | OPENSSL_free(imod); |
| 478 | } |
| 479 | |
| 480 | /* Add a static module to OpenSSL */ |
| 481 | |
| 482 | int CONF_module_add(const char *name, conf_init_func *ifunc, |
| 483 | conf_finish_func *ffunc) |
| 484 | { |
| 485 | if (module_add(NULL, name, ifunc, ffunc)) |
| 486 | return 1; |
| 487 | else |
| 488 | return 0; |
| 489 | } |
| 490 | |
| 491 | void CONF_modules_free(void) |
| 492 | { |
| 493 | CONF_modules_finish(); |
| 494 | CONF_modules_unload(1); |
| 495 | } |
| 496 | |
| 497 | /* Utility functions */ |
| 498 | |
| 499 | const char *CONF_imodule_get_name(const CONF_IMODULE *md) |
| 500 | { |
| 501 | return md->name; |
| 502 | } |
| 503 | |
| 504 | const char *CONF_imodule_get_value(const CONF_IMODULE *md) |
| 505 | { |
| 506 | return md->value; |
| 507 | } |
| 508 | |
| 509 | void *CONF_imodule_get_usr_data(const CONF_IMODULE *md) |
| 510 | { |
| 511 | return md->usr_data; |
| 512 | } |
| 513 | |
| 514 | void CONF_imodule_set_usr_data(CONF_IMODULE *md, void *usr_data) |
| 515 | { |
| 516 | md->usr_data = usr_data; |
| 517 | } |
| 518 | |
| 519 | CONF_MODULE *CONF_imodule_get_module(const CONF_IMODULE *md) |
| 520 | { |
| 521 | return md->pmod; |
| 522 | } |
| 523 | |
| 524 | unsigned long CONF_imodule_get_flags(const CONF_IMODULE *md) |
| 525 | { |
| 526 | return md->flags; |
| 527 | } |
| 528 | |
| 529 | void CONF_imodule_set_flags(CONF_IMODULE *md, unsigned long flags) |
| 530 | { |
| 531 | md->flags = flags; |
| 532 | } |
| 533 | |
| 534 | void *CONF_module_get_usr_data(CONF_MODULE *pmod) |
| 535 | { |
| 536 | return pmod->usr_data; |
| 537 | } |
| 538 | |
| 539 | void CONF_module_set_usr_data(CONF_MODULE *pmod, void *usr_data) |
| 540 | { |
| 541 | pmod->usr_data = usr_data; |
| 542 | } |
| 543 | |
| 544 | /* Return default config file name */ |
| 545 | |
| 546 | char *CONF_get1_default_config_file(void) |
| 547 | { |
| 548 | char *file; |
| 549 | int len; |
| 550 | |
| 551 | file = getenv("OPENSSL_CONF"); |
| 552 | if (file) |
| 553 | return BUF_strdup(file); |
| 554 | |
| 555 | len = strlen(X509_get_default_cert_area()); |
| 556 | #ifndef OPENSSL_SYS_VMS |
| 557 | len++; |
| 558 | #endif |
| 559 | len += strlen(OPENSSL_CONF); |
| 560 | |
| 561 | file = OPENSSL_malloc(len + 1); |
| 562 | |
| 563 | if (!file) |
| 564 | return NULL; |
| 565 | BUF_strlcpy(file,X509_get_default_cert_area(),len + 1); |
| 566 | #ifndef OPENSSL_SYS_VMS |
| 567 | BUF_strlcat(file,"/",len + 1); |
| 568 | #endif |
| 569 | BUF_strlcat(file,OPENSSL_CONF,len + 1); |
| 570 | |
| 571 | return file; |
| 572 | } |
| 573 | |
| 574 | /* This function takes a list separated by 'sep' and calls the |
| 575 | * callback function giving the start and length of each member |
| 576 | * optionally stripping leading and trailing whitespace. This can |
| 577 | * be used to parse comma separated lists for example. |
| 578 | */ |
| 579 | |
| 580 | int CONF_parse_list(const char *list_, int sep, int nospc, |
| 581 | int (*list_cb)(const char *elem, int len, void *usr), void *arg) |
| 582 | { |
| 583 | int ret; |
| 584 | const char *lstart, *tmpend, *p; |
| 585 | |
| 586 | if(list_ == NULL) |
| 587 | { |
| 588 | CONFerr(CONF_F_CONF_PARSE_LIST, CONF_R_LIST_CANNOT_BE_NULL); |
| 589 | return 0; |
| 590 | } |
| 591 | |
| 592 | lstart = list_; |
| 593 | for(;;) |
| 594 | { |
| 595 | if (nospc) |
| 596 | { |
| 597 | while(*lstart && isspace((unsigned char)*lstart)) |
| 598 | lstart++; |
| 599 | } |
| 600 | p = strchr(lstart, sep); |
| 601 | if (p == lstart || !*lstart) |
| 602 | ret = list_cb(NULL, 0, arg); |
| 603 | else |
| 604 | { |
| 605 | if (p) |
| 606 | tmpend = p - 1; |
| 607 | else |
| 608 | tmpend = lstart + strlen(lstart) - 1; |
| 609 | if (nospc) |
| 610 | { |
| 611 | while(isspace((unsigned char)*tmpend)) |
| 612 | tmpend--; |
| 613 | } |
| 614 | ret = list_cb(lstart, tmpend - lstart + 1, arg); |
| 615 | } |
| 616 | if (ret <= 0) |
| 617 | return ret; |
| 618 | if (p == NULL) |
| 619 | return 1; |
| 620 | lstart = p + 1; |
| 621 | } |
| 622 | } |
| 623 | |