1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2014 Baptiste Daroussin <bapt@FreeBSD.org> 5 * Copyright (c) 2013 Bryan Drewery <bdrewery@FreeBSD.org> 6 * 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 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 #include <sys/param.h> 32 #include <sys/queue.h> 33 #include <sys/utsname.h> 34 #include <sys/sysctl.h> 35 36 #include <dirent.h> 37 #include <ucl.h> 38 #include <err.h> 39 #include <errno.h> 40 #include <libutil.h> 41 #include <paths.h> 42 #include <stdbool.h> 43 #include <unistd.h> 44 #include <ctype.h> 45 46 #include "config.h" 47 48 struct config_value { 49 char *value; 50 STAILQ_ENTRY(config_value) next; 51 }; 52 53 struct config_entry { 54 uint8_t type; 55 const char *key; 56 const char *val; 57 char *value; 58 STAILQ_HEAD(, config_value) *list; 59 bool envset; 60 bool main_only; /* Only set in pkg.conf. */ 61 }; 62 63 static struct config_entry c[] = { 64 [PACKAGESITE] = { 65 PKG_CONFIG_STRING, 66 "PACKAGESITE", 67 URL_SCHEME_PREFIX "http://pkg.FreeBSD.org/${ABI}/latest", 68 NULL, 69 NULL, 70 false, 71 false, 72 }, 73 [ABI] = { 74 PKG_CONFIG_STRING, 75 "ABI", 76 NULL, 77 NULL, 78 NULL, 79 false, 80 true, 81 }, 82 [MIRROR_TYPE] = { 83 PKG_CONFIG_STRING, 84 "MIRROR_TYPE", 85 "SRV", 86 NULL, 87 NULL, 88 false, 89 false, 90 }, 91 [ASSUME_ALWAYS_YES] = { 92 PKG_CONFIG_BOOL, 93 "ASSUME_ALWAYS_YES", 94 "NO", 95 NULL, 96 NULL, 97 false, 98 true, 99 }, 100 [SIGNATURE_TYPE] = { 101 PKG_CONFIG_STRING, 102 "SIGNATURE_TYPE", 103 NULL, 104 NULL, 105 NULL, 106 false, 107 false, 108 }, 109 [FINGERPRINTS] = { 110 PKG_CONFIG_STRING, 111 "FINGERPRINTS", 112 NULL, 113 NULL, 114 NULL, 115 false, 116 false, 117 }, 118 [REPOS_DIR] = { 119 PKG_CONFIG_LIST, 120 "REPOS_DIR", 121 NULL, 122 NULL, 123 NULL, 124 false, 125 true, 126 }, 127 [PUBKEY] = { 128 PKG_CONFIG_STRING, 129 "PUBKEY", 130 NULL, 131 NULL, 132 NULL, 133 false, 134 false 135 }, 136 [PKG_ENV] = { 137 PKG_CONFIG_OBJECT, 138 "PKG_ENV", 139 NULL, 140 NULL, 141 NULL, 142 false, 143 false, 144 } 145 }; 146 147 static int 148 pkg_get_myabi(char *dest, size_t sz) 149 { 150 struct utsname uts; 151 char machine_arch[255]; 152 size_t len; 153 int error; 154 155 error = uname(&uts); 156 if (error) 157 return (errno); 158 159 len = sizeof(machine_arch); 160 error = sysctlbyname("hw.machine_arch", machine_arch, &len, NULL, 0); 161 if (error) 162 return (errno); 163 machine_arch[len] = '\0'; 164 165 /* 166 * Use __FreeBSD_version rather than kernel version (uts.release) for 167 * use in jails. This is equivalent to the value of uname -U. 168 */ 169 snprintf(dest, sz, "%s:%d:%s", uts.sysname, __FreeBSD_version/100000, 170 machine_arch); 171 172 return (error); 173 } 174 175 static void 176 subst_packagesite(const char *abi) 177 { 178 char *newval; 179 const char *variable_string; 180 const char *oldval; 181 182 if (c[PACKAGESITE].value != NULL) 183 oldval = c[PACKAGESITE].value; 184 else 185 oldval = c[PACKAGESITE].val; 186 187 if ((variable_string = strstr(oldval, "${ABI}")) == NULL) 188 return; 189 190 asprintf(&newval, "%.*s%s%s", 191 (int)(variable_string - oldval), oldval, abi, 192 variable_string + strlen("${ABI}")); 193 if (newval == NULL) 194 errx(EXIT_FAILURE, "asprintf"); 195 196 free(c[PACKAGESITE].value); 197 c[PACKAGESITE].value = newval; 198 } 199 200 static int 201 boolstr_to_bool(const char *str) 202 { 203 if (str != NULL && (strcasecmp(str, "true") == 0 || 204 strcasecmp(str, "yes") == 0 || strcasecmp(str, "on") == 0 || 205 str[0] == '1')) 206 return (true); 207 208 return (false); 209 } 210 211 static void 212 config_parse(const ucl_object_t *obj, pkg_conf_file_t conftype) 213 { 214 FILE *buffp; 215 char *buf = NULL; 216 size_t bufsz = 0; 217 const ucl_object_t *cur, *seq, *tmp; 218 ucl_object_iter_t it = NULL, itseq = NULL, it_obj = NULL; 219 struct config_entry *temp_config; 220 struct config_value *cv; 221 const char *key, *evkey; 222 int i; 223 size_t j; 224 225 /* Temporary config for configs that may be disabled. */ 226 temp_config = calloc(CONFIG_SIZE, sizeof(struct config_entry)); 227 buffp = open_memstream(&buf, &bufsz); 228 if (buffp == NULL) 229 err(EXIT_FAILURE, "open_memstream()"); 230 231 while ((cur = ucl_iterate_object(obj, &it, true))) { 232 key = ucl_object_key(cur); 233 if (key == NULL) 234 continue; 235 if (buf != NULL) 236 memset(buf, 0, bufsz); 237 rewind(buffp); 238 239 if (conftype == CONFFILE_PKG) { 240 for (j = 0; j < strlen(key); ++j) 241 fputc(toupper(key[j]), buffp); 242 fflush(buffp); 243 } else if (conftype == CONFFILE_REPO) { 244 if (strcasecmp(key, "url") == 0) 245 fputs("PACKAGESITE", buffp); 246 else if (strcasecmp(key, "mirror_type") == 0) 247 fputs("MIRROR_TYPE", buffp); 248 else if (strcasecmp(key, "signature_type") == 0) 249 fputs("SIGNATURE_TYPE", buffp); 250 else if (strcasecmp(key, "fingerprints") == 0) 251 fputs("FINGERPRINTS", buffp); 252 else if (strcasecmp(key, "pubkey") == 0) 253 fputs("PUBKEY", buffp); 254 else if (strcasecmp(key, "enabled") == 0) { 255 if ((cur->type != UCL_BOOLEAN) || 256 !ucl_object_toboolean(cur)) 257 goto cleanup; 258 } else 259 continue; 260 fflush(buffp); 261 } 262 263 for (i = 0; i < CONFIG_SIZE; i++) { 264 if (strcmp(buf, c[i].key) == 0) 265 break; 266 } 267 268 /* Silently skip unknown keys to be future compatible. */ 269 if (i == CONFIG_SIZE) 270 continue; 271 272 /* env has priority over config file */ 273 if (c[i].envset) 274 continue; 275 276 /* Parse sequence value ["item1", "item2"] */ 277 switch (c[i].type) { 278 case PKG_CONFIG_LIST: 279 if (cur->type != UCL_ARRAY) { 280 warnx("Skipping invalid array " 281 "value for %s.\n", c[i].key); 282 continue; 283 } 284 temp_config[i].list = 285 malloc(sizeof(*temp_config[i].list)); 286 STAILQ_INIT(temp_config[i].list); 287 288 while ((seq = ucl_iterate_object(cur, &itseq, true))) { 289 if (seq->type != UCL_STRING) 290 continue; 291 cv = malloc(sizeof(struct config_value)); 292 cv->value = 293 strdup(ucl_object_tostring(seq)); 294 STAILQ_INSERT_TAIL(temp_config[i].list, cv, 295 next); 296 } 297 break; 298 case PKG_CONFIG_BOOL: 299 temp_config[i].value = 300 strdup(ucl_object_toboolean(cur) ? "yes" : "no"); 301 break; 302 case PKG_CONFIG_OBJECT: 303 if (strcmp(c[i].key, "PKG_ENV") == 0) { 304 while ((tmp = 305 ucl_iterate_object(cur, &it_obj, true))) { 306 evkey = ucl_object_key(tmp); 307 if (evkey != NULL && *evkey != '\0') { 308 setenv(evkey, ucl_object_tostring_forced(tmp), 1); 309 } 310 } 311 } 312 break; 313 default: 314 /* Normal string value. */ 315 temp_config[i].value = strdup(ucl_object_tostring(cur)); 316 break; 317 } 318 } 319 320 /* Repo is enabled, copy over all settings from temp_config. */ 321 for (i = 0; i < CONFIG_SIZE; i++) { 322 if (c[i].envset) 323 continue; 324 /* Prevent overriding ABI, ASSUME_ALWAYS_YES, etc. */ 325 if (conftype != CONFFILE_PKG && c[i].main_only == true) 326 continue; 327 switch (c[i].type) { 328 case PKG_CONFIG_LIST: 329 c[i].list = temp_config[i].list; 330 break; 331 default: 332 c[i].value = temp_config[i].value; 333 break; 334 } 335 } 336 337 cleanup: 338 free(temp_config); 339 fclose(buffp); 340 free(buf); 341 } 342 343 /*- 344 * Parse new repo style configs in style: 345 * Name: 346 * URL: 347 * MIRROR_TYPE: 348 * etc... 349 */ 350 static void 351 parse_repo_file(ucl_object_t *obj, const char *requested_repo) 352 { 353 ucl_object_iter_t it = NULL; 354 const ucl_object_t *cur; 355 const char *key; 356 357 while ((cur = ucl_iterate_object(obj, &it, true))) { 358 key = ucl_object_key(cur); 359 360 if (key == NULL) 361 continue; 362 363 if (cur->type != UCL_OBJECT) 364 continue; 365 366 if (requested_repo != NULL && strcmp(requested_repo, key) != 0) 367 continue; 368 369 config_parse(cur, CONFFILE_REPO); 370 } 371 } 372 373 374 static int 375 read_conf_file(const char *confpath, const char *requested_repo, 376 pkg_conf_file_t conftype) 377 { 378 struct ucl_parser *p; 379 ucl_object_t *obj = NULL; 380 381 p = ucl_parser_new(0); 382 383 if (!ucl_parser_add_file(p, confpath)) { 384 if (errno != ENOENT) 385 errx(EXIT_FAILURE, "Unable to parse configuration " 386 "file %s: %s", confpath, ucl_parser_get_error(p)); 387 ucl_parser_free(p); 388 /* no configuration present */ 389 return (1); 390 } 391 392 obj = ucl_parser_get_object(p); 393 if (obj->type != UCL_OBJECT) 394 warnx("Invalid configuration format, ignoring the " 395 "configuration file %s", confpath); 396 else { 397 if (conftype == CONFFILE_PKG) 398 config_parse(obj, conftype); 399 else if (conftype == CONFFILE_REPO) 400 parse_repo_file(obj, requested_repo); 401 } 402 403 ucl_object_unref(obj); 404 ucl_parser_free(p); 405 406 return (0); 407 } 408 409 static int 410 load_repositories(const char *repodir, const char *requested_repo) 411 { 412 struct dirent *ent; 413 DIR *d; 414 char *p; 415 size_t n; 416 char path[MAXPATHLEN]; 417 int ret; 418 419 ret = 0; 420 421 if ((d = opendir(repodir)) == NULL) 422 return (1); 423 424 while ((ent = readdir(d))) { 425 /* Trim out 'repos'. */ 426 if ((n = strlen(ent->d_name)) <= 5) 427 continue; 428 p = &ent->d_name[n - 5]; 429 if (strcmp(p, ".conf") == 0) { 430 snprintf(path, sizeof(path), "%s%s%s", 431 repodir, 432 repodir[strlen(repodir) - 1] == '/' ? "" : "/", 433 ent->d_name); 434 if (access(path, F_OK) != 0) 435 continue; 436 if (read_conf_file(path, requested_repo, 437 CONFFILE_REPO)) { 438 ret = 1; 439 goto cleanup; 440 } 441 } 442 } 443 444 cleanup: 445 closedir(d); 446 447 return (ret); 448 } 449 450 int 451 config_init(const char *requested_repo) 452 { 453 char *val; 454 int i; 455 const char *localbase; 456 char *env_list_item; 457 char confpath[MAXPATHLEN]; 458 struct config_value *cv; 459 char abi[BUFSIZ]; 460 461 for (i = 0; i < CONFIG_SIZE; i++) { 462 val = getenv(c[i].key); 463 if (val != NULL) { 464 c[i].envset = true; 465 switch (c[i].type) { 466 case PKG_CONFIG_LIST: 467 /* Split up comma-separated items from env. */ 468 c[i].list = malloc(sizeof(*c[i].list)); 469 STAILQ_INIT(c[i].list); 470 for (env_list_item = strtok(val, ","); 471 env_list_item != NULL; 472 env_list_item = strtok(NULL, ",")) { 473 cv = 474 malloc(sizeof(struct config_value)); 475 cv->value = 476 strdup(env_list_item); 477 STAILQ_INSERT_TAIL(c[i].list, cv, 478 next); 479 } 480 break; 481 default: 482 c[i].val = val; 483 break; 484 } 485 } 486 } 487 488 /* Read LOCALBASE/etc/pkg.conf first. */ 489 localbase = getlocalbase(); 490 snprintf(confpath, sizeof(confpath), "%s/etc/pkg.conf", localbase); 491 492 if (access(confpath, F_OK) == 0 && read_conf_file(confpath, NULL, 493 CONFFILE_PKG)) 494 goto finalize; 495 496 /* Then read in all repos from REPOS_DIR list of directories. */ 497 if (c[REPOS_DIR].list == NULL) { 498 c[REPOS_DIR].list = malloc(sizeof(*c[REPOS_DIR].list)); 499 STAILQ_INIT(c[REPOS_DIR].list); 500 cv = malloc(sizeof(struct config_value)); 501 cv->value = strdup("/etc/pkg"); 502 STAILQ_INSERT_TAIL(c[REPOS_DIR].list, cv, next); 503 cv = malloc(sizeof(struct config_value)); 504 if (asprintf(&cv->value, "%s/etc/pkg/repos", localbase) < 0) 505 goto finalize; 506 STAILQ_INSERT_TAIL(c[REPOS_DIR].list, cv, next); 507 } 508 509 STAILQ_FOREACH(cv, c[REPOS_DIR].list, next) 510 if (load_repositories(cv->value, requested_repo)) 511 goto finalize; 512 513 finalize: 514 if (c[ABI].val == NULL && c[ABI].value == NULL) { 515 if (pkg_get_myabi(abi, BUFSIZ) != 0) 516 errx(EXIT_FAILURE, "Failed to determine the system " 517 "ABI"); 518 c[ABI].val = abi; 519 } 520 521 subst_packagesite(c[ABI].value != NULL ? c[ABI].value : c[ABI].val); 522 523 return (0); 524 } 525 526 int 527 config_string(pkg_config_key k, const char **val) 528 { 529 if (c[k].type != PKG_CONFIG_STRING) 530 return (-1); 531 532 if (c[k].value != NULL) 533 *val = c[k].value; 534 else 535 *val = c[k].val; 536 537 return (0); 538 } 539 540 int 541 config_bool(pkg_config_key k, bool *val) 542 { 543 const char *value; 544 545 if (c[k].type != PKG_CONFIG_BOOL) 546 return (-1); 547 548 *val = false; 549 550 if (c[k].value != NULL) 551 value = c[k].value; 552 else 553 value = c[k].val; 554 555 if (boolstr_to_bool(value)) 556 *val = true; 557 558 return (0); 559 } 560 561 void 562 config_finish(void) { 563 int i; 564 565 for (i = 0; i < CONFIG_SIZE; i++) 566 free(c[i].value); 567 } 568