src/rcfile.c

   1 /*
   2     Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
   3     Ben Kibbey <bjk@luxsci.net>
   4
   5     This file is part of pwmd.
   6
   7     Pwmd is free software: you can redistribute it and/or modify
   8     it under the terms of the GNU General Public License as published by
   9     the Free Software Foundation, either version 2 of the License, or
  10     (at your option) any later version.
  11
  12     Pwmd is distributed in the hope that it will be useful,
  13     but WITHOUT ANY WARRANTY; without even the implied warranty of
  14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15     GNU General Public License for more details.
  16
  17     You should have received a copy of the GNU General Public License
  18     along with Pwmd.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20 #ifdef HAVE_CONFIG_H
  21 #include <config.h>
  22 #endif
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <sys/types.h>
  27 #include <sys/stat.h>
  28 #include <fcntl.h>
  29 #include <errno.h>
  30 #include <ctype.h>
  31
  32 #include "pwmd-error.h"
  33 #include <gcrypt.h>
  34 #include "mutex.h"
  35 #include "rcfile.h"
  36 #include "util-misc.h"
  37 #include "common.h"
  38 #include "util-slist.h"
  39 #include "util-string.h"
  40 #include "mem.h"
  41
  42 #define DEFAULT_PINENTRY_TIMEOUT "30"
  43 #define DEFAULT_CACHE_TIMEOUT "600"
  44 #define DEFAULT_KEEPALIVE_INTERVAL "60"
  45
  46 #define INVALID_VALUE(file, line) do {                                  \
  47     if (file)                                                           \
  48       log_write(_("%s(%i): invalid value for parameter."), file, line); \
  49   } while (0);
  50
  51 enum
  52 {
  53   PARAM_INT, PARAM_CHARP, PARAM_LONG, PARAM_LONGLONG, PARAM_CHARPP,
  54   PARAM_BOOL, PARAM_ULONG, PARAM_ULONGLONG
  55 };
  56
  57 static struct config_params_s
  58 {
  59   char *name;
  60   int type;
  61   char *value;
  62 } config_params[] = {
  63   {  "backup",                  PARAM_BOOL,             "true"},
  64   {  "socket_path",             PARAM_CHARP,            NULL},
  65   {  "socket_perms",            PARAM_CHARP,            NULL},
  66   {  "passphrase",              PARAM_CHARP,            NULL},
  67   {  "passphrase_file",         PARAM_CHARP,            NULL},
  68   {  "agent_env_file",          PARAM_CHARP,            NULL},
  69   {  "log_path",                PARAM_CHARP,            "~/.pwmd/log"},
  70   {  "enable_logging",          PARAM_BOOL,             "0"},
  71   {  "log_level",               PARAM_INT,              "0"},
  72   {  "disable_mlockall",        PARAM_BOOL,             "true"},
  73   {  "cache_timeout",           PARAM_INT,              DEFAULT_CACHE_TIMEOUT},
  74   {  "cache_push",              PARAM_CHARPP,           NULL},
  75   {  "disable_list_and_dump",   PARAM_BOOL,             "false"},
  76   {  "recursion_depth",         PARAM_INT,              "100"},
  77   {  "syslog",                  PARAM_BOOL,             "false"},
  78   {  "xfer_progress",           PARAM_INT,              "8196"},
  79   {  "allowed",                 PARAM_CHARPP,           NULL},
  80   {  "keyparam",                PARAM_CHARP,            "(genkey (rsa (nbits 4:2048)))"},
  81   {  "cipher",                  PARAM_CHARP,            "aes256"},
  82   {  "kill_scd",                PARAM_BOOL,             "false"},
  83   {  "cipher_iterations",       PARAM_ULONGLONG,        "0"},
  84   {  "cipher_progress",         PARAM_LONG,             DEFAULT_ITERATION_PROGRESS},
  85   {  "priority",                PARAM_INT,              INVALID_PRIORITY},
  86   {  "keepalive_interval",      PARAM_INT,              DEFAULT_KEEPALIVE_INTERVAL},
  87   {  "tcp_port",                PARAM_INT,              "6466"},
  88   {  "enable_tcp",              PARAM_BOOL,             "false"},
  89   {  "tcp_require_key",         PARAM_BOOL,             "false"},
  90   {  "tcp_wait",                PARAM_INT,              "0"},
  91   {  "tcp_bind",                PARAM_CHARP,            "any"},
  92   {  "tcp_interface",           PARAM_CHARP,            NULL},
  93   {  "tls_timeout",             PARAM_INT,              "300"},
  94   {  "tls_cipher_suite",        PARAM_CHARP,            "SECURE256"},
  95   {  "tls_access",              PARAM_CHARPP,           NULL},
  96   {  "pinentry_path",           PARAM_CHARP,            PINENTRY_PATH},
  97   {  "pinentry_timeout",        PARAM_INT,              DEFAULT_PINENTRY_TIMEOUT},
  98   {  "use_agent",               PARAM_BOOL,             "false"},
  99   {  "require_save_key",        PARAM_BOOL,             "true"},
 100   { NULL,                       0,                      NULL},
 101 };
 102
 103 struct config_param_s
 104 {
 105   char *name;
 106   int type;
 107   union
 108   {
 109     int itype;
 110     char *cptype;
 111     char **cpptype;
 112     long ltype;
 113     long long lltype;
 114     unsigned long ultype;
 115     unsigned long long ulltype;
 116   } value;
 117 };
 118
 119 static struct config_section_s *config_find_section (struct slist_s *config,
 120                                               const char *name);
 121 static int new_param (struct config_section_s *section, const char *filename,
 122                       int lineno, const char *name, const char *value,
 123                       int type);
 124 static void free_section (struct config_section_s *s);
 125 static int set_defaults (struct slist_s **config);
 126
 127 static void
 128 section_remove_param (struct config_section_s *section, const char *name)
 129 {
 130   unsigned i, t = slist_length (section->params);
 131
 132   for (i = 0; i < t; i++)
 133     {
 134       struct config_param_s *p = slist_nth_data (section->params, i);
 135
 136       if (!p)
 137         continue;
 138
 139       if (!strcmp (p->name, name))
 140         {
 141           switch (p->type)
 142             {
 143             case PARAM_CHARP:
 144               xfree (p->value.cptype);
 145               break;
 146             case PARAM_CHARPP:
 147               strv_free (p->value.cpptype);
 148               break;
 149             }
 150
 151           section->params = slist_remove (section->params, p);
 152           xfree (p->name);
 153           xfree (p);
 154           break;
 155         }
 156     }
 157 }
 158
 159 void
 160 config_clear_keys ()
 161 {
 162   MUTEX_LOCK (&rcfile_mutex);
 163   unsigned i, t = slist_length (global_config);
 164
 165   for (i = 0; i < t; i++)
 166     {
 167       struct config_section_s *s = slist_nth_data (global_config, i);
 168       if (!s)
 169         continue;
 170
 171       section_remove_param (s, "passphrase");
 172     }
 173
 174   MUTEX_UNLOCK (&rcfile_mutex);
 175 }
 176
 177 static struct config_param_s *
 178 config_has_param (struct config_section_s *s, const char *what)
 179 {
 180   unsigned i, t = slist_length (s->params);
 181
 182   for (i = 0; i < t; i++)
 183     {
 184       struct config_param_s *p = slist_nth_data (s->params, i);
 185       if (!p)
 186         break;
 187
 188       if (!strcmp (p->name, what))
 189         return p;
 190     }
 191
 192   return NULL;
 193 }
 194
 195 static struct config_param_s *
 196 config_get_param (struct slist_s *config,
 197                   const char *section, const char *what, int *exists)
 198 {
 199   unsigned i, t = slist_length (config);
 200
 201   *exists = 0;
 202
 203   for (i = 0; i < t; i++)
 204     {
 205       struct config_param_s *p;
 206       struct config_section_s *s = slist_nth_data (config, i);
 207
 208       if (!s)
 209         break;
 210
 211       if (strcmp (s->name, section))
 212         continue;
 213
 214       p = config_has_param (s, what);
 215       if (!p)
 216         return NULL;
 217
 218       *exists = 1;
 219       return p;
 220     }
 221
 222   return NULL;
 223 }
 224
 225 static struct config_section_s *
 226 new_section (struct slist_s **config, const char *name)
 227 {
 228   struct slist_s *tmp;
 229   struct config_section_s *s = xcalloc (1, sizeof (struct config_section_s));
 230
 231   if (!s)
 232     return NULL;
 233
 234   s->name = str_dup (name);
 235   if (!s->name)
 236     {
 237       log_write ("%s", pwmd_strerror (ENOMEM));
 238       xfree (s);
 239       return NULL;
 240     }
 241
 242   tmp = slist_append (*config, s);
 243   if (!tmp)
 244     {
 245       log_write ("%s", pwmd_strerror (ENOMEM));
 246       xfree (s->name);
 247       xfree (s);
 248       return NULL;
 249     }
 250
 251   *config = tmp;
 252   return s;
 253 }
 254
 255 int
 256 config_set_string_param (struct slist_s **config, const char *section,
 257                          const char *name, const char *value)
 258 {
 259   struct config_section_s *s = config_find_section (*config, section);
 260
 261   if (!s)
 262     {
 263       s = new_section (config, section);
 264       if (!s)
 265         return 1;
 266     }
 267
 268   return new_param (s, NULL, 0, name, value, PARAM_CHARP);
 269 }
 270
 271 char *
 272 config_get_string_param (struct slist_s *config, const char *section,
 273                          const char *what, int *exists)
 274 {
 275   struct config_param_s *p = config_get_param (config, section, what, exists);
 276   return *exists && p->value.cptype ? str_dup (p->value.cptype) : NULL;
 277 }
 278
 279 int
 280 config_set_int_param (struct slist_s **config, const char *section,
 281                       const char *name, const char *value)
 282 {
 283   struct config_section_s *s = config_find_section (*config, section);
 284
 285   if (!s)
 286     {
 287       s = new_section (config, section);
 288       if (!s)
 289         return 1;
 290     }
 291
 292   return new_param (s, NULL, 0, name, value, PARAM_INT);
 293 }
 294
 295 int
 296 config_get_int_param (struct slist_s *config, const char *section,
 297                       const char *what, int *exists)
 298 {
 299   struct config_param_s *p = config_get_param (config, section, what, exists);
 300   return *exists ? p->value.itype : -1;
 301 }
 302
 303 int
 304 config_set_bool_param (struct slist_s **config, const char *section,
 305                        const char *name, const char *value)
 306 {
 307   struct config_section_s *s = config_find_section (*config, section);
 308
 309   if (!s)
 310     {
 311       s = new_section (config, section);
 312       if (!s)
 313         return 1;
 314     }
 315
 316   return new_param (s, NULL, 0, name, value, PARAM_BOOL);
 317 }
 318
 319 int
 320 config_get_bool_param (struct slist_s *config, const char *section,
 321                        const char *what, int *exists)
 322 {
 323   return config_get_int_param (config, section, what, exists);
 324 }
 325
 326 int
 327 config_set_long_param (struct slist_s **config, const char *section,
 328                        const char *name, const char *value)
 329 {
 330   struct config_section_s *s = config_find_section (*config, section);
 331
 332   if (!s)
 333     {
 334       s = new_section (config, section);
 335       if (!s)
 336         return 1;
 337     }
 338
 339   return new_param (s, NULL, 0, name, value, PARAM_LONG);
 340 }
 341
 342 unsigned long
 343 config_get_ulong_param (struct slist_s *config, const char *section,
 344                         const char *what, int *exists)
 345 {
 346   struct config_param_s *p = config_get_param (config, section, what, exists);
 347   return *exists ? p->value.ultype : 0;
 348 }
 349
 350 long
 351 config_get_long_param (struct slist_s *config, const char *section,
 352                        const char *what, int *exists)
 353 {
 354   struct config_param_s *p = config_get_param (config, section, what, exists);
 355   return *exists ? p->value.ltype : -1;
 356 }
 357
 358 int
 359 config_set_longlong_param (struct slist_s **config, const char *section,
 360                            const char *name, const char *value)
 361 {
 362   struct config_section_s *s = config_find_section (*config, section);
 363
 364   if (!s)
 365     {
 366       s = new_section (config, section);
 367       if (!s)
 368         return 1;
 369     }
 370
 371   return new_param (s, NULL, 0, name, value, PARAM_LONGLONG);
 372 }
 373
 374 long long
 375 config_get_longlong_param (struct slist_s *config,
 376                            const char *section, const char *what, int *exists)
 377 {
 378   struct config_param_s *p = config_get_param (config, section, what, exists);
 379   return *exists ? p->value.lltype : -1;
 380 }
 381
 382 unsigned long long
 383 config_get_ulonglong_param (struct slist_s *config,
 384                             const char *section,
 385                             const char *what, int *exists)
 386 {
 387   struct config_param_s *p = config_get_param (config, section, what, exists);
 388   return *exists ? p->value.ulltype : 0;
 389 }
 390
 391 int
 392 config_set_list_param (struct slist_s **config, const char *section,
 393                        const char *name, const char *value)
 394 {
 395   struct config_section_s *s = config_find_section (*config, section);
 396
 397   if (!s)
 398     {
 399       s = new_section (config, section);
 400       if (!s)
 401         return 1;
 402     }
 403
 404   return new_param (s, NULL, 0, name, value, PARAM_CHARPP);
 405 }
 406
 407 char **
 408 config_get_list_param (struct slist_s *config, const char *section,
 409                        const char *what, int *exists)
 410 {
 411   struct config_param_s *p = config_get_param (config, section, what, exists);
 412   return *exists && p->value.cpptype ? strv_dup (p->value.cpptype) : NULL;
 413 }
 414
 415 char *
 416 config_get_string (const char *section, const char *what)
 417 {
 418   char *val = NULL;
 419   const char *where = section ? section : "global";
 420   int exists = 0;
 421
 422   MUTEX_LOCK (&rcfile_mutex);
 423   val = config_get_string_param (global_config, where, what, &exists);
 424   if (!exists && strcmp (section ? section : "", "global"))
 425     val = config_get_string_param (global_config, "global", what, &exists);
 426
 427   MUTEX_UNLOCK (&rcfile_mutex);
 428   return val;
 429 }
 430
 431 char **
 432 config_get_list (const char *section, const char *what)
 433 {
 434   char **val = NULL;
 435   const char *where = section ? section : "global";
 436   int exists = 0;
 437
 438   MUTEX_LOCK (&rcfile_mutex);
 439   val = config_get_list_param (global_config, where, what, &exists);
 440   if (!exists && strcmp (section ? section : "", "global"))
 441     val = config_get_list_param (global_config, "global", what, &exists);
 442
 443   MUTEX_UNLOCK (&rcfile_mutex);
 444   return val;
 445 }
 446
 447 int
 448 config_get_integer (const char *section, const char *what)
 449 {
 450   int val = 0;
 451   const char *where = section ? section : "global";
 452   int exists = 0;
 453
 454   MUTEX_LOCK (&rcfile_mutex);
 455   val = config_get_int_param (global_config, where, what, &exists);
 456   if (!exists && strcmp (section ? section : "", "global"))
 457     val = config_get_int_param (global_config, "global", what, &exists);
 458
 459   MUTEX_UNLOCK (&rcfile_mutex);
 460   return val;
 461 }
 462
 463 long long
 464 config_get_longlong (const char *section, const char *what)
 465 {
 466   long long val = 0;
 467   const char *where = section ? section : "global";
 468   int exists = 0;
 469
 470   MUTEX_LOCK (&rcfile_mutex);
 471   val = config_get_longlong_param (global_config, where, what, &exists);
 472   if (!exists && strcmp (section ? section : "", "global"))
 473     val = config_get_longlong_param (global_config, "global", what, &exists);
 474
 475   MUTEX_UNLOCK (&rcfile_mutex);
 476   return val;
 477 }
 478
 479 unsigned long long
 480 config_get_ulonglong (const char *section, const char *what)
 481 {
 482   unsigned long long val = 0;
 483   const char *where = section ? section : "global";
 484   int exists = 0;
 485
 486   MUTEX_LOCK (&rcfile_mutex);
 487   val = config_get_ulonglong_param (global_config, where, what, &exists);
 488   if (!exists && strcmp (section ? section : "", "global"))
 489     val = config_get_ulonglong_param (global_config, "global", what, &exists);
 490
 491   MUTEX_UNLOCK (&rcfile_mutex);
 492   return val;
 493 }
 494
 495 long
 496 config_get_long (const char *section, const char *what)
 497 {
 498   long val = 0;
 499   const char *where = section ? section : "global";
 500   int exists = 0;
 501
 502   MUTEX_LOCK (&rcfile_mutex);
 503   val = config_get_long_param (global_config, where, what, &exists);
 504   if (!exists && strcmp (section ? section : "", "global"))
 505     val = config_get_long_param (global_config, "global", what, &exists);
 506
 507   MUTEX_UNLOCK (&rcfile_mutex);
 508   return val;
 509 }
 510
 511 unsigned long
 512 config_get_ulong (const char *section, const char *what)
 513 {
 514   unsigned long val = 0;
 515   const char *where = section ? section : "global";
 516   int exists = 0;
 517
 518   MUTEX_LOCK (&rcfile_mutex);
 519   val = config_get_ulong_param (global_config, where, what, &exists);
 520   if (!exists && strcmp (section ? section : "", "global"))
 521     val = config_get_ulong_param (global_config, "global", what, &exists);
 522
 523   MUTEX_UNLOCK (&rcfile_mutex);
 524   return val;
 525 }
 526
 527 int
 528 config_get_boolean (const char *section, const char *what)
 529 {
 530   return config_get_integer (section, what);
 531 }
 532
 533 char *
 534 config_get_value (const char *section, const char *what)
 535 {
 536   const char *where = section ? section : "global";
 537   int exists = 0;
 538   int i;
 539   int ival;
 540   long lval;
 541   long long llval;
 542   unsigned long ulval;
 543   unsigned long long ullval;
 544   char *cpval;
 545   char **cppval;
 546   char *result = NULL;
 547
 548   MUTEX_LOCK (&rcfile_mutex);
 549
 550   for (i = 0; config_params[i].name; i++)
 551     {
 552       if (!strcmp (config_params[i].name, what))
 553         {
 554           switch (config_params[i].type)
 555             {
 556             case PARAM_BOOL:
 557             case PARAM_INT:
 558               ival = config_get_int_param (global_config, where, what,
 559                                            &exists);
 560               if (!exists && strcmp (section ? section : "", "global"))
 561                 ival = config_get_int_param (global_config, "global", what,
 562                                              &exists);
 563               result = str_asprintf ("%i", ival);
 564               break;
 565             case PARAM_CHARP:
 566               cpval = config_get_string_param (global_config, where, what,
 567                                                &exists);
 568               if (!exists && strcmp (section ? section : "", "global"))
 569                 cpval =
 570                   config_get_string_param (global_config, "global", what,
 571                                            &exists);
 572               result = cpval;
 573               break;
 574             case PARAM_LONG:
 575               lval = config_get_long_param (global_config, where, what,
 576                                             &exists);
 577               if (!exists && strcmp (section ? section : "", "global"))
 578                 lval = config_get_long_param (global_config, "global", what,
 579                                               &exists);
 580               result = str_asprintf ("%li", lval);
 581               break;
 582             case PARAM_ULONG:
 583               ulval = config_get_ulong_param (global_config, where, what,
 584                                               &exists);
 585               if (!exists && strcmp (section ? section : "", "global"))
 586                 ulval = config_get_ulong_param (global_config, "global", what,
 587                                                 &exists);
 588               result = str_asprintf ("%lu", ulval);
 589               break;
 590             case PARAM_LONGLONG:
 591               llval = config_get_longlong_param (global_config, where, what,
 592                                                  &exists);
 593               if (!exists && strcmp (section ? section : "", "global"))
 594                 llval = config_get_longlong_param (global_config, "global",
 595                                                    what, &exists);
 596               result = str_asprintf ("%lli", llval);
 597               break;
 598             case PARAM_ULONGLONG:
 599               ullval = config_get_ulonglong_param (global_config, where, what,
 600                                                    &exists);
 601               if (!exists && strcmp (section ? section : "", "global"))
 602                 ullval = config_get_ulonglong_param (global_config, "global",
 603                                                      what, &exists);
 604               result = str_asprintf ("%llu", ullval);
 605               break;
 606             case PARAM_CHARPP:
 607               cppval = config_get_list_param (global_config, where, what,
 608                                               &exists);
 609               if (!exists && strcmp (section ? section : "", "global"))
 610                 cppval = config_get_list_param (global_config, "global", what,
 611                                                 &exists);
 612
 613               if (cppval)
 614                 result = strv_join (",", cppval);
 615
 616               strv_free (cppval);
 617               break;
 618             }
 619         }
 620     }
 621
 622   MUTEX_UNLOCK (&rcfile_mutex);
 623   return result;
 624 }
 625
 626 static int
 627 set_defaults (struct slist_s **config)
 628 {
 629   char *s;
 630   char **list;
 631   int exists;
 632   int i;
 633
 634   for (i = 0; config_params[i].name; i++)
 635     {
 636       switch (config_params[i].type)
 637         {
 638         case PARAM_BOOL:
 639           config_get_bool_param (*config, "global", config_params[i].name,
 640                                  &exists);
 641           if (!exists)
 642             {
 643               if (config_set_bool_param
 644                   (config, "global", config_params[i].name,
 645                    config_params[i].value))
 646                 goto fail;
 647             }
 648           break;
 649         case PARAM_INT:
 650           config_get_int_param (*config, "global", config_params[i].name,
 651                                 &exists);
 652           if (!exists)
 653             {
 654               if (config_set_int_param
 655                   (config, "global", config_params[i].name,
 656                    config_params[i].value))
 657                 goto fail;
 658             }
 659           break;
 660         case PARAM_CHARP:
 661           s = config_get_string_param (*config, "global",
 662                                         config_params[i].name, &exists);
 663           xfree (s);
 664           if (!exists && config_params[i].value)
 665             {
 666               if (config_set_string_param (config, "global",
 667                                            config_params[i].name,
 668                                            config_params[i].value))
 669                 goto fail;
 670             }
 671           break;
 672         case PARAM_CHARPP:
 673           list = config_get_list_param (*config, "global",
 674                                         config_params[i].name, &exists);
 675           strv_free (list);
 676           if (!exists && config_params[i].value)
 677             {
 678               if (config_set_list_param (config, "global",
 679                                          config_params[i].name,
 680                                          config_params[i].value))
 681                 goto fail;
 682             }
 683           break;
 684         case PARAM_LONG:
 685           config_get_long_param (*config, "global", config_params[i].name,
 686                                  &exists);
 687           if (!exists)
 688             {
 689               if (config_set_long_param
 690                   (config, "global", config_params[i].name,
 691                    config_params[i].value))
 692                 goto fail;
 693             }
 694           break;
 695         case PARAM_LONGLONG:
 696           config_get_longlong_param (*config, "global", config_params[i].name,
 697                                      &exists);
 698           if (!exists)
 699             {
 700               if (config_set_longlong_param (config, "global",
 701                                              config_params[i].name,
 702                                              config_params[i].value))
 703                 goto fail;
 704             }
 705           break;
 706         }
 707     }
 708
 709   list = config_get_list_param (*config, "global", "allowed", &exists);
 710   strv_free (list);
 711   if (!exists)
 712     {
 713       if (config_set_list_param
 714           (config, "global", "allowed", get_username ()))
 715         goto fail;
 716     }
 717
 718   max_recursion_depth = config_get_int_param (*config, "global",
 719                                               "recursion_depth", &exists);
 720   disable_list_and_dump = config_get_bool_param (*config, "global",
 721                                                  "disable_list_and_dump",
 722                                                  &exists);
 723 #ifdef HAVE_MLOCKALL
 724   disable_mlock =
 725     config_get_bool_param (*config, "global", "disable_mlockall", &exists);
 726 #endif
 727   return 0;
 728
 729 fail:
 730   return 1;
 731 }
 732
 733 static struct config_section_s *
 734 config_find_section (struct slist_s *config, const char *name)
 735 {
 736   unsigned i, t = slist_length (config);
 737
 738   for (i = 0; i < t; i++)
 739     {
 740       struct config_section_s *s = slist_nth_data (config, i);
 741
 742       if (!strcmp (s->name, name))
 743         return s;
 744     }
 745
 746   return NULL;
 747 }
 748
 749 /* Append a new parameter to the list of parameters for a file
 750  * section. When an existing parameter of the same name exists, its
 751  * value is updated.
 752  */
 753 static int
 754 new_param (struct config_section_s *section, const char *filename, int lineno,
 755            const char *name, const char *value, int type)
 756 {
 757   struct config_param_s *param = NULL;
 758   struct slist_s *tmp;
 759   char *e;
 760   unsigned i, t = slist_length (section->params);
 761   int dup = 0;
 762
 763   for (i = 0; i < t; i++)
 764     {
 765       struct config_param_s *p = slist_nth_data (section->params, i);
 766       if (!p)
 767         break;
 768
 769       if (!strcmp (name, p->name))
 770         {
 771           param = p;
 772           dup = 1;
 773           break;
 774         }
 775     }
 776
 777   if (!param)
 778     {
 779       param = xcalloc (1, sizeof (struct config_param_s));
 780       if (!param)
 781         {
 782           log_write ("%s", pwmd_strerror (ENOMEM));
 783           return 1;
 784         }
 785
 786       param->name = str_dup (name);
 787       if (!param->name)
 788         {
 789           xfree (param);
 790           log_write ("%s", pwmd_strerror (ENOMEM));
 791           return 1;
 792         }
 793     }
 794
 795   param->type = type;
 796
 797   switch (type)
 798     {
 799     case PARAM_BOOL:
 800       if (!strcasecmp (value, "no") || !strcasecmp (value, "0")
 801           || !strcasecmp (value, "false"))
 802         param->value.itype = 0;
 803       else if (!strcasecmp (value, "yes") || !strcasecmp (value, "1")
 804                || !strcasecmp (value, "true"))
 805         param->value.itype = 1;
 806       else
 807         {
 808           INVALID_VALUE (filename, lineno);
 809           goto fail;
 810         }
 811       param->type = PARAM_INT;
 812       break;
 813     case PARAM_CHARP:
 814       xfree (param->value.cptype);
 815       param->value.cptype = value ? str_dup (value) : NULL;
 816       if (value && !param->value.cptype)
 817         {
 818           log_write ("%s", pwmd_strerror (ENOMEM));
 819           goto fail;
 820         }
 821       break;
 822     case PARAM_CHARPP:
 823       strv_free (param->value.cpptype);
 824       param->value.cpptype = value ? str_split (value, ",", 0) : NULL;
 825       if (value && !param->value.cpptype)
 826         {
 827           log_write ("%s", pwmd_strerror (ENOMEM));
 828           goto fail;
 829         }
 830       break;
 831     case PARAM_INT:
 832       param->value.itype = strtol (value, &e, 10);
 833       if (e && *e)
 834         {
 835           INVALID_VALUE (filename, lineno);
 836           goto fail;
 837         }
 838       break;
 839     case PARAM_LONG:
 840       param->value.ltype = strtol (value, &e, 10);
 841       if (e && *e)
 842         {
 843           INVALID_VALUE (filename, lineno);
 844           goto fail;
 845         }
 846       break;
 847     case PARAM_LONGLONG:
 848       param->value.lltype = strtoll (value, &e, 10);
 849       if (e && *e)
 850         {
 851           INVALID_VALUE (filename, lineno);
 852           goto fail;
 853         }
 854       break;
 855     case PARAM_ULONGLONG:
 856       param->value.ulltype = strtoull (value, &e, 10);
 857       if (e && *e)
 858         {
 859           INVALID_VALUE (filename, lineno);
 860           goto fail;
 861         }
 862       break;
 863     case PARAM_ULONG:
 864       param->value.ultype = strtoul (value, &e, 10);
 865       if (e && *e)
 866         {
 867           INVALID_VALUE (filename, lineno);
 868           goto fail;
 869         }
 870       break;
 871     }
 872
 873   if (dup)
 874     return 0;
 875
 876   tmp = slist_append (section->params, param);
 877   if (!tmp)
 878     {
 879       log_write ("%s", pwmd_strerror (ENOMEM));
 880       goto fail;
 881     }
 882
 883   section->params = tmp;
 884   return 0;
 885
 886 fail:
 887   xfree (param->name);
 888   xfree (param);
 889   return 1;
 890 }
 891
 892 struct slist_s *
 893 config_parse (const char *filename)
 894 {
 895   struct slist_s *tmpconfig = NULL, *tmp;
 896   struct config_section_s *cur_section = NULL;
 897   char buf[LINE_MAX];
 898   char *s;
 899   int lineno = 1;
 900   int have_global = 0;
 901   FILE *fp = fopen (filename, "r");
 902
 903   if (!fp)
 904     {
 905       log_write ("%s: %s", filename,
 906                  pwmd_strerror (gpg_error_from_errno (errno)));
 907
 908       if (errno != ENOENT)
 909         return NULL;
 910
 911       log_write (_("Using defaults!"));
 912       goto defaults;
 913     }
 914
 915   for (; (s = fgets (buf, sizeof (buf), fp)); lineno++)
 916     {
 917       char line[LINE_MAX] = { 0 };
 918       size_t len = 0;
 919
 920       if (*s == '#')
 921         continue;
 922
 923       s = str_chomp (s);
 924       for (; s && *s; s++)
 925         {
 926           int match = 0;
 927
 928           /* New file section. */
 929           if (*s == '[')
 930             {
 931               struct config_section_s *section;
 932               char *p = strchr (++s, ']');
 933
 934               if (!p)
 935                 {
 936                   log_write (_("%s(%i): unbalanced braces"), filename,
 937                              lineno);
 938                   goto fail;
 939                 }
 940
 941               len = strlen (s) - strlen (p);
 942               memcpy (line, s, len);
 943               line[len] = 0;
 944
 945               section = config_find_section (tmpconfig, line);
 946               if (section)
 947                 {
 948                   log_write (_("%s(%i): section '%s' already exists!"),
 949                              filename, lineno, line);
 950                   goto fail;
 951                 }
 952
 953               if (!strcmp (line, "global"))
 954                 have_global = 1;
 955
 956               section = xcalloc (1, sizeof (struct config_section_s));
 957               section->name = str_dup (line);
 958
 959               if (cur_section)
 960                 {
 961                   tmp = slist_append (tmpconfig, cur_section);
 962                   if (!tmp)
 963                     {
 964                       log_write ("%s", pwmd_strerror (ENOMEM));
 965                       goto fail;
 966                     }
 967
 968                   tmpconfig = tmp;
 969                 }
 970
 971               cur_section = section;
 972               break;
 973             }
 974
 975           if (!cur_section)
 976             {
 977               log_write (_("%s(%i): parameter outside of section!"), filename,
 978                          lineno);
 979               goto fail;
 980             }
 981
 982           /* Parameters for each section. */
 983           for (int m = 0; config_params[m].name; m++)
 984             {
 985               size_t len = strlen (config_params[m].name);
 986
 987               if (!strncmp (s, config_params[m].name, len))
 988                 {
 989                   char *p = s + len;
 990
 991                   while (*p && *p == ' ')
 992                     p++;
 993
 994                   if (!*p || *p != '=')
 995                     continue;
 996
 997                   p++;
 998                   while (*p && isspace (*p))
 999                     p++;
1000
1001                   s[len] = 0;
1002                   if (new_param (cur_section, filename, lineno, s, p,
1003                                  config_params[m].type))
1004                     goto fail;
1005
1006                   match = 1;
1007                   break;
1008                 }
1009             }
1010
1011           if (!match)
1012             {
1013               log_write (_("%s(%i): unknown parameter"), filename, lineno);
1014               goto fail;
1015             }
1016
1017           break;
1018         }
1019     }
1020
1021   fclose (fp);
1022
1023   if (cur_section)
1024     {
1025       tmp = slist_append (tmpconfig, cur_section);
1026       if (!tmp)
1027         {
1028           log_write ("%s", pwmd_strerror (ENOMEM));
1029           goto fail;
1030         }
1031
1032       cur_section = NULL;
1033       tmpconfig = tmp;
1034     }
1035
1036   if (!have_global)
1037     log_write (_
1038                ("WARNING: %s: could not find a [global] configuration section!"),
1039                filename);
1040
1041 defaults:
1042   if (set_defaults (&tmpconfig))
1043     goto fail;
1044
1045   return tmpconfig;
1046
1047 fail:
1048   fclose (fp);
1049   config_free (tmpconfig);
1050   free_section (cur_section);
1051   return NULL;
1052 }
1053
1054 static void
1055 free_section (struct config_section_s *s)
1056 {
1057   if (!s)
1058     return;
1059
1060   for (;;)
1061     {
1062       struct config_param_s *p = slist_nth_data (s->params, 0);
1063
1064       if (!p)
1065         break;
1066
1067       section_remove_param (s, p->name);
1068     }
1069
1070   s->params = NULL;
1071   xfree (s->name);
1072   s->name = NULL;
1073 }
1074
1075 void
1076 config_free (struct slist_s *config)
1077 {
1078   for (;;)
1079     {
1080       struct config_section_s *s = slist_nth_data (config, 0);
1081       if (!s)
1082         break;
1083
1084       free_section (s);
1085       config = slist_remove (config, s);
1086       xfree (s);
1087     }
1088 }