onak-conf.c

   1 /*
   2  * onak-conf.c - Routines related to runtime config.
   3  *
   4  * Copyright 2002,2012 Jonathan McDowell <noodles@earth.li>
   5  *
   6  * This program is free software: you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the Free
   8  * Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc., 51
  17  * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  */
  19
  20 #include "config.h"
  21
  22 #include <ctype.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <strings.h>
  27
  28 #include "ll.h"
  29 #include "log.h"
  30 #include "onak-conf.h"
  31
  32 extern struct onak_dbctx *DBINIT(struct onak_db_config *dbcfg, bool readonly);
  33
  34 /*
  35  *      config - Runtime configuration for onak.
  36  *
  37  *      This is the default config; normally overridden with values from the
  38  *      config file.
  39  */
  40 struct onak_config config = {
  41         .maxkeys = 128,
  42         .thissite = NULL,
  43         .adminemail = NULL,
  44         .mta = NULL,
  45         .syncsites = NULL,
  46         .logfile = NULL,
  47
  48         .use_keyd = false,
  49         .sock_dir = NULL,
  50
  51         .backends = NULL,
  52         .backends_dir = NULL,
  53
  54         .dbinit = DBINIT,
  55
  56         .check_sighash = true,
  57
  58         .bin_dir = NULL,
  59         .mail_dir = NULL,
  60 };
  61
  62 struct onak_db_config *find_db_backend_config(struct ll *backends, char *name)
  63 {
  64         struct ll *cur;
  65
  66         cur = backends;
  67         while (cur != NULL && strcmp(name,
  68                         ((struct onak_db_config *) cur->object)->name)) {
  69                 cur = cur->next;
  70         }
  71
  72         return (cur != NULL) ? (struct onak_db_config *) cur->object : NULL;
  73 }
  74
  75 bool parsebool(char *str, bool fallback)
  76 {
  77         if (!strcasecmp(str, "false") || !strcasecmp(str, "no") ||
  78                         !strcasecmp(str, "0")) {
  79                 return false;
  80         } else if (!strcasecmp(str, "true") || !strcasecmp(str, "yes") ||
  81                         !strcasecmp(str, "1")) {
  82                 return true;
  83         } else {
  84                 logthing(LOGTHING_CRITICAL,
  85                         "Couldn't parse %s as a boolean config variable, "
  86                         "returning fallback of '%s'.",
  87                         str,
  88                         fallback ? "true" : "false");
  89                 return fallback;
  90         }
  91 }
  92
  93 /*
  94  * Parse an old pksd style config line, as used in onak 0.4.6 and earlier.
  95  */
  96 static bool parseoldconfigline(char *line)
  97 {
  98         if (line[0] == '#' || line[0] == 0) {
  99                 /*
 100                  * Comment line, ignore.
 101                  */
 102         } else if (!strncmp("db_dir ", line, 7)) {
 103                 config.backend->location = strdup(&line[7]);
 104         } else if (!strncmp("debug ", line, 6)) {
 105                 /*
 106                  * Not supported yet; ignore for compatibility with
 107                  * pksd.
 108                  */
 109         } else if (!strncmp("default_language ", line, 17)) {
 110                 /*
 111                  * Not supported yet; ignore for compatibility with
 112                  * pksd.
 113                  */
 114         } else if (!strncmp("mail_delivery_client ", line, 21)) {
 115                 config.mta = strdup(&line[21]);
 116         } else if (!strncmp("maintainer_email ", line, 17)) {
 117                 config.adminemail = strdup(&line[17]);
 118         } else if (!strncmp("mail_intro_file ", line, 16)) {
 119                 /*
 120                  * Not supported yet; ignore for compatibility with
 121                  * pksd.
 122                  */
 123         } else if (!strncmp("help_dir ", line, 9)) {
 124                 /*
 125                  * Not supported yet; ignore for compatibility with
 126                  * pksd.
 127                  */
 128         } else if (!strncmp("max_last ", line, 9)) {
 129                 /*
 130                  * Not supported yet; ignore for compatibility with
 131                  * pksd.
 132                  */
 133         } else if (!strncmp("max_reply_keys ", line, 15)) {
 134                 config.maxkeys = atoi(&line[15]);
 135         } else if (!strncmp("pg_dbhost ", line, 10)) {
 136                 config.backend->hostname = strdup(&line[10]);
 137         } else if (!strncmp("pg_dbname ", line, 10)) {
 138                 config.backend->location = strdup(&line[10]);
 139         } else if (!strncmp("pg_dbuser ", line, 10)) {
 140                 config.backend->username = strdup(&line[10]);
 141         } else if (!strncmp("pg_dbpass ", line, 10)) {
 142                 config.backend->password = strdup(&line[10]);
 143         } else if (!strncmp("syncsite ", line, 9)) {
 144                 config.syncsites =
 145                         lladd(config.syncsites, strdup(&line[9]));
 146         } else if (!strncmp("logfile ", line, 8)) {
 147                 config.logfile = strdup(&line[8]);
 148         } else if (!strncmp("loglevel ", line, 9)) {
 149                 setlogthreshold(atoi(&line[9]));
 150         } else if (!strncmp("this_site ", line, 10)) {
 151                 config.thissite = strdup(&line[10]);
 152         } else if (!strncmp("socket_name ", line, 12) ||
 153                         !strncmp("www_port ", line, 9)) {
 154                 /*
 155                  * Not applicable; ignored for compatibility with pksd.
 156                  */
 157         } else if (!strncmp("pks_bin_dir ", line, 12)) {
 158                 config.bin_dir = strdup(&line[12]);
 159         } else if (!strncmp("mail_dir ", line, 9)) {
 160                 config.mail_dir = strdup(&line[9]);
 161         } else if (!strncmp("db_backend ", line, 11)) {
 162                 config.backend->type = strdup(&line[11]);
 163                 config.backend->name = strdup(&line[11]);
 164                 config.db_backend = strdup(&line[11]);
 165         } else if (!strncmp("backends_dir ", line, 13)) {
 166                 config.backends_dir = strdup(&line[13]);
 167         } else if (!strncmp("use_keyd ", line, 9)) {
 168                 config.use_keyd = parsebool(&line[9],
 169                                         config.use_keyd);
 170         } else if (!strncmp("sock_dir ", line, 9)) {
 171                 config.sock_dir = strdup(&line[9]);
 172         } else if (!strncmp("check_sighash ", line, 9)) {
 173                 config.check_sighash = parsebool(&line[9],
 174                                         config.check_sighash);
 175         } else {
 176                 return false;
 177         }
 178
 179         return true;
 180 }
 181
 182 /*
 183  * Parse a new style .ini config line, supporting [sections] and name=value
 184  * format.
 185  */
 186 static bool parseconfigline(char *line)
 187 {
 188         /* Yes, this means we're not re-entrant. */
 189         static char section[32] = "";
 190         struct onak_db_config *backend;
 191         size_t len;
 192         char *name, *value;
 193
 194         if (line[0] == '#' || line[0] == ';' ||
 195                         line[0] == 0) {
 196                 /*
 197                  * Comment line, ignore.
 198                  */
 199         } else if (line[0] == '[') {
 200                 /* Section name */
 201                 len = strlen(line);
 202                 if (line[len - 1] != ']') {
 203                         logthing(LOGTHING_CRITICAL,
 204                                 "Malformed section header '%s' in "
 205                                 "config file.", line);
 206                         return false;
 207                 }
 208                 if (len > sizeof(section)) {
 209                         logthing(LOGTHING_CRITICAL,
 210                                 "Section header '%s' is too long in "
 211                                 "config file.", line);
 212                         return false;
 213                 }
 214                 line[len - 1] = 0;
 215                 strncpy(section, &line[1], len);
 216         } else if ((value = strchr(line, '=')) != NULL) {
 217                 name = line;
 218                 *value++ = 0;
 219
 220                 /* We can have multiple backend: sections */
 221                 if (!strncmp(section, "backend:", 8)) {
 222                         backend = find_db_backend_config(
 223                                 config.backends, &section[8]);
 224                         if (backend == NULL) {
 225                                 backend = calloc(1,
 226                                         sizeof(struct onak_db_config));
 227                                 backend->name = strdup(&section[8]);
 228                                 config.backends = lladd(config.backends,
 229                                                         backend);
 230                         }
 231
 232                         if (!strcmp(name, "type")) {
 233                                 backend->type = strdup(value);
 234                         } else if (!strcmp(name, "location")) {
 235                                 backend->location = strdup(value);
 236                         } else if (!strcmp(name, "hostname")) {
 237                                 backend->location = strdup(value);
 238                         } else if (!strcmp(name, "username")) {
 239                                 backend->location = strdup(value);
 240                         } else if (!strcmp(name, "password")) {
 241                                 backend->location = strdup(value);
 242                         }
 243
 244 #define MATCH(s, n) !strcmp(section, s) && !strcmp(name, n)
 245                 /* [main] section */
 246                 } else if (MATCH("main", "backend")) {
 247                         config.db_backend = strdup(value);
 248                 } else if (MATCH("main", "backends_dir")) {
 249                         config.backends_dir = strdup(value);
 250                 } else if (MATCH("main", "logfile")) {
 251                         config.logfile = strdup(value);
 252                 } else if (MATCH("main", "loglevel")) {
 253                         setlogthreshold(atoi(value));
 254                 } else if (MATCH("main", "use_keyd")) {
 255                         config.use_keyd = parsebool(value,
 256                                         config.use_keyd);
 257                 } else if (MATCH("main", "sock_dir")) {
 258                         config.sock_dir = strdup(value);
 259                 } else if (MATCH("main", "max_reply_keys")) {
 260                         config.maxkeys = atoi(value);
 261                 /* [mail] section */
 262                 } else if (MATCH("mail", "maintainer_email")) {
 263                         config.adminemail = strdup(value);
 264                 } else if (MATCH("mail", "mail_dir")) {
 265                 config.mail_dir = strdup(value);
 266                 } else if (MATCH("mail", "mta")) {
 267                         config.mta = strdup(value);
 268                 } else if (MATCH("mail", "bin_dir")) {
 269                         config.bin_dir = strdup(value);
 270                 } else if (MATCH("mail", "this_site")) {
 271                         config.thissite = strdup(value);
 272                 } else if (MATCH("mail", "syncsite")) {
 273                         config.syncsites = lladd(config.syncsites,
 274                                 strdup(value));
 275                 /* [verification] section */
 276                 } else if (MATCH("verification", "check_sighash")) {
 277                         config.check_sighash = parsebool(value,
 278                                         config.check_sighash);
 279                 } else {
 280                         return false;
 281                 }
 282         } else {
 283                 return false;
 284         }
 285
 286         return true;
 287 }
 288
 289 void readconfig(const char *configfile) {
 290         FILE *conffile;
 291         char  curline[1024];
 292         int   i;
 293         char *dir, *conf;
 294         size_t len;
 295         struct onak_db_config *backend;
 296         bool oldstyle = false;
 297         bool res;
 298
 299         curline[1023] = 0;
 300
 301         /*
 302          * Try to find a config file to use. If one is explicitly provided,
 303          * use that. Otherwise look in $XDG_CONFIG_HOME, $HOME and finally
 304          * the build in configuration directory. We try an old style onak.conf
 305          * first and then the new style onak.ini if that wasn't found - this
 306          * is to prevent breaking existing installs on upgrade.
 307          */
 308         if (configfile == NULL) {
 309                 conffile = NULL;
 310                 if ((dir = getenv("XDG_CONFIG_HOME")) != NULL) {
 311                         /* dir + / + onak.conf + NUL */
 312                         len = strlen(dir) + 1 + 9 + 1;
 313                         conf = malloc(len);
 314                         snprintf(conf, len, "%s/onak.conf", dir);
 315                         conffile = fopen(conf, "r");
 316                         if (conffile == NULL) {
 317                                 /* Conveniently .ini is shorter than .conf */
 318                                 snprintf(conf, len, "%s/onak.ini", dir);
 319                                 conffile = fopen(conf, "r");
 320                         } else {
 321                                 oldstyle = true;
 322                         }
 323                         free(conf);
 324                 } else if ((dir = getenv("HOME")) != NULL) {
 325                         /* dir + /.config/onak.conf + NUL */
 326                         len = strlen(dir) + 18 + 1;
 327                         conf = malloc(len);
 328                         snprintf(conf, len, "%s/.config/onak.conf", dir);
 329                         conffile = fopen(conf, "r");
 330                         if (conffile == NULL) {
 331                                 /* Conveniently .ini is shorter than .conf */
 332                                 snprintf(conf, len, "%s/onak.ini", dir);
 333                                 conffile = fopen(conf, "r");
 334                         } else {
 335                                 oldstyle = true;
 336                         }
 337                         free(conf);
 338                 }
 339                 if (conffile == NULL) {
 340                         conffile = fopen(CONFIGDIR "/onak.conf", "r");
 341                         if (conffile == NULL) {
 342                                 conffile = fopen(CONFIGDIR "/onak.ini", "r");
 343                         } else {
 344                                 oldstyle = true;
 345                         }
 346                 }
 347         } else {
 348                 /*
 349                  * Explicitly provided config file; if the filename ends .conf
 350                  * assume it's old style.
 351                  */
 352                 len = strlen(configfile);
 353                 if (!strcmp(&configfile[len - 5], ".conf")) {
 354                         oldstyle = true;
 355                 }
 356                 conffile = fopen(configfile, "r");
 357         }
 358
 359         if (conffile != NULL) {
 360                 if (!fgets(curline, 1023, conffile)) {
 361                         logthing(LOGTHING_CRITICAL,
 362                                 "Problem reading configuration file.");
 363                         fclose(conffile);
 364                         return;
 365                 }
 366
 367                 if (oldstyle) {
 368                         /* Add a single DB configuration */
 369                         backend = calloc(1, sizeof(*backend));
 370                         config.backend = backend;
 371                         config.backends = lladd(NULL, backend);
 372                 }
 373
 374                 while (!feof(conffile)) {
 375                         /* Strip any trailing white space */
 376                         for (i = strlen(curline) - 1;
 377                                         i >= 0 && isspace(curline[i]);
 378                                         i--) {
 379                                 curline[i] = 0;
 380                         }
 381
 382                         /* Strip any leading white space */
 383                         i = 0;
 384                         while (curline[i] != 0 && isspace(curline[i])) {
 385                                 i++;
 386                         }
 387
 388                         if (oldstyle) {
 389                                 res = parseoldconfigline(&curline[i]);
 390                         } else {
 391                                 res = parseconfigline(&curline[i]);
 392                         }
 393                         if (!res) {
 394                                 logthing(LOGTHING_ERROR,
 395                                         "Unknown config line: %s", curline);
 396                         }
 397
 398                         if (!fgets(curline, 1023, conffile) &&
 399                                         !feof(conffile)) {
 400                                 logthing(LOGTHING_CRITICAL,
 401                                         "Problem reading configuration file.");
 402                                 break;
 403                         }
 404                 }
 405                 fclose(conffile);
 406
 407                 if (config.db_backend == NULL) {
 408                         logthing(LOGTHING_CRITICAL,
 409                                 "No database backend configured.");
 410                 } else if (!oldstyle) {
 411                         config.backend = find_db_backend_config(
 412                                 config.backends, config.db_backend);
 413                         if (config.backend == NULL) {
 414                                 logthing(LOGTHING_NOTICE,
 415                                         "Couldn't find configuration for %s "
 416                                         "backend.", config.db_backend);
 417                         }
 418                 }
 419         } else {
 420                 logthing(LOGTHING_NOTICE,
 421                                 "Couldn't open config file; using defaults.");
 422         }
 423 }
 424
 425 void writeconfig(const char *configfile)
 426 {
 427         FILE *conffile;
 428         struct ll *cur;
 429
 430         if (configfile) {
 431                 conffile = fopen(configfile, "w");
 432         } else {
 433                 conffile = stdout;
 434         }
 435
 436 #define WRITE_IF_NOT_NULL(c, s) if (c != NULL) { \
 437         fprintf(conffile, s "=%s\n", c); \
 438 }
 439 #define WRITE_BOOL(c, s) fprintf(conffile, s "=%s\n", s ? "true" : "false");
 440
 441         fprintf(conffile, "[main]\n");
 442         WRITE_IF_NOT_NULL(config.backend->name, "backend");
 443         WRITE_IF_NOT_NULL(config.backends_dir, "backends_dir");
 444         WRITE_IF_NOT_NULL(config.logfile, "logfile");
 445         fprintf(conffile, "loglevel=%d\n", getlogthreshold());
 446         WRITE_BOOL(config.use_keyd, "use_keyd");
 447         WRITE_IF_NOT_NULL(config.sock_dir, "sock_dir");
 448         fprintf(conffile, "max_reply_keys=%d\n", config.maxkeys);
 449         fprintf(conffile, "\n");
 450
 451         fprintf(conffile, "[verification]\n");
 452         WRITE_BOOL(config.check_sighash, "check_sighash");
 453         fprintf(conffile, "\n");
 454
 455         fprintf(conffile, "[mail]\n");
 456         WRITE_IF_NOT_NULL(config.adminemail, "maintainer_email");
 457         WRITE_IF_NOT_NULL(config.mail_dir, "mail_dir");
 458         WRITE_IF_NOT_NULL(config.mta, "mta");
 459         WRITE_IF_NOT_NULL(config.bin_dir, "bin_dir");
 460         WRITE_IF_NOT_NULL(config.thissite, "this_site");
 461
 462         cur = config.syncsites;
 463         while (cur != NULL) {
 464                 fprintf(conffile, "syncsite=%s\n", (char *) cur->object);
 465                 cur = cur->next;
 466         }
 467
 468         cur = config.backends;
 469         while (cur != NULL) {
 470                 struct onak_db_config *backend =
 471                         (struct onak_db_config *) cur->object;
 472                 fprintf(conffile, "\n[backend:%s]\n", backend->name);
 473                 WRITE_IF_NOT_NULL(backend->type, "type");
 474                 WRITE_IF_NOT_NULL(backend->location, "location");
 475                 WRITE_IF_NOT_NULL(backend->hostname, "hostname");
 476                 WRITE_IF_NOT_NULL(backend->username, "username");
 477                 WRITE_IF_NOT_NULL(backend->password, "password");
 478                 cur = cur->next;
 479         }
 480
 481         if (configfile) {
 482                 fclose(conffile);
 483         }
 484 }
 485
 486 void cleanupdbconfig(void *object)
 487 {
 488         struct onak_db_config *dbconfig = (struct onak_db_config *) object;
 489
 490         if (dbconfig->name != NULL) {
 491                 free(dbconfig->name);
 492                 dbconfig->name = NULL;
 493         }
 494         if (dbconfig->type != NULL) {
 495                 free(dbconfig->type);
 496                 dbconfig->type = NULL;
 497         }
 498         if (dbconfig->location != NULL) {
 499                 free(dbconfig->location);
 500                 dbconfig->location = NULL;
 501         }
 502         if (dbconfig->hostname != NULL) {
 503                 free(dbconfig->hostname);
 504                 dbconfig->hostname = NULL;
 505         }
 506         if (dbconfig->username != NULL) {
 507                 free(dbconfig->username);
 508                 dbconfig->username = NULL;
 509         }
 510         if (dbconfig->password != NULL) {
 511                 free(dbconfig->password);
 512                 dbconfig->password = NULL;
 513         }
 514
 515         free(dbconfig);
 516 }
 517
 518 void cleanupconfig(void) {
 519         /* Free any defined DB backend configuration first */
 520         llfree(config.backends, cleanupdbconfig);
 521         config.backends = NULL;
 522
 523         if (config.thissite != NULL) {
 524                 free(config.thissite);
 525                 config.thissite = NULL;
 526         }
 527         if (config.adminemail != NULL) {
 528                 free(config.adminemail);
 529                 config.adminemail = NULL;
 530         }
 531         if (config.mta != NULL) {
 532                 free(config.mta);
 533                 config.mta = NULL;
 534         }
 535         if (config.syncsites != NULL) {
 536                 llfree(config.syncsites, free);
 537                 config.syncsites = NULL;
 538         }
 539         if (config.logfile != NULL) {
 540                 free(config.logfile);
 541                 config.logfile = NULL;
 542         }
 543         if (config.db_backend != NULL) {
 544                 free(config.db_backend);
 545                 config.db_backend = NULL;
 546         }
 547         if (config.backends_dir != NULL) {
 548                 free(config.backends_dir);
 549                 config.backends_dir = NULL;
 550         }
 551         if (config.sock_dir != NULL) {
 552                 free(config.sock_dir);
 553                 config.sock_dir = NULL;
 554         }
 555         if (config.bin_dir != NULL) {
 556                 free(config.bin_dir);
 557                 config.bin_dir = NULL;
 558         }
 559         if (config.mail_dir != NULL) {
 560                 free(config.mail_dir);
 561                 config.mail_dir = NULL;
 562         }
 563 }