mdw@git.distorted.org.uk Git - disorder/blob - lib/configuration.c

   1 /*
   2  * This file is part of DisOrder.
   3  * Copyright (C) 2004-2011, 2013 Richard Kettlewell
   4  * Portions copyright (C) 2007 Mark Wooding
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19 /** @file lib/configuration.c
  20  * @brief Configuration file support
  21  */
  22
  23 #include "common.h"
  24
  25 #include <errno.h>
  26 #include <sys/types.h>
  27 #include <sys/stat.h>
  28 #if HAVE_UNISTD_H
  29 # include <unistd.h>
  30 #endif
  31 #include <ctype.h>
  32 #include <stddef.h>
  33 #if HAVE_PWD_H
  34 # include <pwd.h>
  35 #endif
  36 #if HAVE_LANGINFO_H
  37 # include <langinfo.h>
  38 #endif
  39
  40 #if HAVE_SHLOBJ_H
  41 # include <Shlobj.h>
  42 #endif
  43 #include <signal.h>
  44
  45 #include "rights.h"
  46 #include "configuration.h"
  47 #include "mem.h"
  48 #include "log.h"
  49 #include "split.h"
  50 #include "syscalls.h"
  51 #include "table.h"
  52 #include "inputline.h"
  53 #include "charset.h"
  54 #include "defs.h"
  55 #include "printf.h"
  56 #include "regexp.h"
  57 #include "regsub.h"
  58 #include "signame.h"
  59 #include "authhash.h"
  60 #include "vector.h"
  61 #if !_WIN32
  62 #include "uaudio.h"
  63 #endif
  64
  65 /** @brief Path to config file
  66  *
  67  * set_configfile() sets the default if it is null.
  68  */
  69 char *configfile;
  70
  71 /** @brief Read user configuration
  72  *
  73  * If clear, the user-specific configuration is not read.
  74  */
  75 int config_per_user = 1;
  76
  77 #if !_WIN32
  78 /** @brief Table of audio APIs
  79  *
  80  * Only set in server processes.
  81  */
  82 const struct uaudio *const *config_uaudio_apis;
  83 #endif
  84
  85 /** @brief Config file parser state */
  86 struct config_state {
  87   /** @brief Filename */
  88   const char *path;
  89
  90   /** @brief Line number */
  91   int line;
  92
  93   /** @brief Configuration object under construction */
  94   struct config *config;
  95 };
  96
  97 /** @brief Current configuration */
  98 struct config *config;
  99
 100 /** @brief One configuration item */
 101 struct conf {
 102   /** @brief Name as it appears in the config file */
 103   const char *name;
 104
 105   /** @brief Offset in @ref config structure */
 106   size_t offset;
 107
 108   /** @brief Pointer to item type */
 109   const struct conftype *type;
 110
 111   /** @brief Pointer to item-specific validation routine
 112    * @param cs Configuration state
 113    * @param nvec Length of (proposed) new value
 114    * @param vec Elements of new value
 115    * @return 0 on success, non-0 on error
 116    *
 117    * The validate function should report any error it detects.
 118    */
 119   int (*validate)(const struct config_state *cs,
 120                   int nvec, char **vec);
 121 };
 122
 123 /** @brief Type of a configuration item */
 124 struct conftype {
 125   /** @brief Pointer to function to set item
 126    * @param cs Configuration state
 127    * @param whoami Configuration item to set
 128    * @param nvec Length of new value
 129    * @param vec New value
 130    * @return 0 on success, non-0 on error
 131    */
 132   int (*set)(const struct config_state *cs,
 133              const struct conf *whoami,
 134              int nvec, char **vec);
 135
 136   /** @brief Pointer to function to free item
 137    * @param c Configuration structure to free an item of
 138    * @param whoami Configuration item to free
 139    */
 140   void (*free)(struct config *c, const struct conf *whoami);
 141 };
 142
 143 /** @brief Compute the address of an item */
 144 #define ADDRESS(C, TYPE) ((TYPE *)((char *)(C) + whoami->offset))
 145 /** @brief Return the value of an item */
 146 #define VALUE(C, TYPE) (*ADDRESS(C, TYPE))
 147
 148 static int stringlist_compare(const struct stringlist *a,
 149                               const struct stringlist *b);
 150 static int namepartlist_compare(const struct namepartlist *a,
 151                                 const struct namepartlist *b);
 152
 153 static int set_signal(const struct config_state *cs,
 154                       const struct conf *whoami,
 155                       int nvec, char **vec) {
 156   int n;
 157
 158   if(nvec != 1) {
 159     disorder_error(0, "%s:%d: '%s' requires one argument",
 160           cs->path, cs->line, whoami->name);
 161     return -1;
 162   }
 163   if((n = find_signal(vec[0])) == -1) {
 164     disorder_error(0, "%s:%d: unknown signal '%s'",
 165           cs->path, cs->line, vec[0]);
 166     return -1;
 167   }
 168   VALUE(cs->config, int) = n;
 169   return 0;
 170 }
 171
 172 static int set_collections(const struct config_state *cs,
 173                            const struct conf *whoami,
 174                            int nvec, char **vec) {
 175   struct collectionlist *cl;
 176   const char *root, *encoding, *module;
 177
 178   switch(nvec) {
 179   case 1:
 180     module = 0;
 181     encoding = 0;
 182     root = vec[0];
 183     break;
 184   case 2:
 185     module = vec[0];
 186     encoding = 0;
 187     root = vec[1];
 188     break;
 189   case 3:
 190     module = vec[0];
 191     encoding = vec[1];
 192     root = vec[2];
 193     break;
 194   case 0:
 195     disorder_error(0, "%s:%d: '%s' requires at least one argument",
 196                    cs->path, cs->line, whoami->name);
 197     return -1;
 198   default:
 199     disorder_error(0, "%s:%d: '%s' requires at most three arguments",
 200                    cs->path, cs->line, whoami->name);
 201     return -1;
 202   }
 203   /* Sanity check root */
 204   if(root[0] != '/') {
 205     disorder_error(0, "%s:%d: collection root must start with '/'",
 206                    cs->path, cs->line);
 207     return -1;
 208   }
 209   if(root[1] && root[strlen(root)-1] == '/') {
 210     disorder_error(0, "%s:%d: collection root must not end with '/'",
 211                    cs->path, cs->line);
 212     return -1;
 213   }
 214   /* Defaults */
 215   if(!module)
 216     module = "fs";
 217 #if HAVE_LANGINFO_H
 218   if(!encoding)
 219     encoding = nl_langinfo(CODESET);
 220 #else
 221   if(!encoding)
 222     encoding = "ascii";
 223 #endif
 224   cl = ADDRESS(cs->config, struct collectionlist);
 225   ++cl->n;
 226   cl->s = xrealloc(cl->s, cl->n * sizeof (struct collection));
 227   cl->s[cl->n - 1].module = xstrdup(module);
 228   cl->s[cl->n - 1].encoding = xstrdup(encoding);
 229   cl->s[cl->n - 1].root = xstrdup(root);
 230   return 0;
 231 }
 232
 233 static int set_boolean(const struct config_state *cs,
 234                        const struct conf *whoami,
 235                        int nvec, char **vec) {
 236   int state;
 237
 238   if(nvec != 1) {
 239     disorder_error(0, "%s:%d: '%s' takes only one argument",
 240                    cs->path, cs->line, whoami->name);
 241     return -1;
 242   }
 243   if(!strcmp(vec[0], "yes")) state = 1;
 244   else if(!strcmp(vec[0], "no")) state = 0;
 245   else {
 246     disorder_error(0, "%s:%d: argument to '%s' must be 'yes' or 'no'",
 247                    cs->path, cs->line, whoami->name);
 248     return -1;
 249   }
 250   VALUE(cs->config, int) = state;
 251   return 0;
 252 }
 253
 254 static int set_string(const struct config_state *cs,
 255                       const struct conf *whoami,
 256                       int nvec, char **vec) {
 257   if(nvec != 1) {
 258     disorder_error(0, "%s:%d: '%s' takes only one argument",
 259                    cs->path, cs->line, whoami->name);
 260     return -1;
 261   }
 262   xfree(VALUE(cs->config, char *));
 263   VALUE(cs->config, char *) = xstrdup(vec[0]);
 264   return 0;
 265 }
 266
 267 static int set_integer(const struct config_state *cs,
 268                        const struct conf *whoami,
 269                        int nvec, char **vec) {
 270   char *e;
 271
 272   if(nvec != 1) {
 273     disorder_error(0, "%s:%d: '%s' takes only one argument",
 274                    cs->path, cs->line, whoami->name);
 275     return -1;
 276   }
 277   if(xstrtol(ADDRESS(cs->config, long), vec[0], &e, 0)) {
 278     disorder_error(errno, "%s:%d: converting integer", cs->path, cs->line);
 279     return -1;
 280   }
 281   if(*e) {
 282     disorder_error(0, "%s:%d: invalid integer syntax", cs->path, cs->line);
 283     return -1;
 284   }
 285   return 0;
 286 }
 287
 288 static int set_stringlist_accum(const struct config_state *cs,
 289                                 const struct conf *whoami,
 290                                 int nvec, char **vec) {
 291   int n;
 292   struct stringlist *s;
 293   struct stringlistlist *sll;
 294
 295   sll = ADDRESS(cs->config, struct stringlistlist);
 296   if(nvec == 0) {
 297     sll->n = 0;
 298     return 0;
 299   }
 300   sll->n++;
 301   sll->s = xrealloc(sll->s, (sll->n * sizeof (struct stringlist)));
 302   s = &sll->s[sll->n - 1];
 303   s->n = nvec;
 304   s->s = xmalloc((nvec + 1) * sizeof (char *));
 305   for(n = 0; n < nvec; ++n)
 306     s->s[n] = xstrdup(vec[n]);
 307   return 0;
 308 }
 309
 310 static int set_string_accum(const struct config_state *cs,
 311                             const struct conf *whoami,
 312                             int nvec, char **vec) {
 313   int n;
 314   struct stringlist *sl;
 315
 316   sl = ADDRESS(cs->config, struct stringlist);
 317   if(nvec == 0) {
 318     sl->n = 0;
 319     return 0;
 320   }
 321   for(n = 0; n < nvec; ++n) {
 322     sl->n++;
 323     sl->s = xrealloc(sl->s, (sl->n * sizeof (char *)));
 324     sl->s[sl->n - 1] = xstrdup(vec[n]);
 325   }
 326   return 0;
 327 }
 328
 329 static int parse_sample_format(const struct config_state *cs,
 330                                struct stream_header *format,
 331                                int nvec, char **vec) {
 332   char *p = vec[0];
 333   long t;
 334
 335   if(nvec != 1) {
 336     disorder_error(0, "%s:%d: wrong number of arguments", cs->path, cs->line);
 337     return -1;
 338   }
 339   if(xstrtol(&t, p, &p, 0)) {
 340     disorder_error(errno, "%s:%d: converting bits-per-sample",
 341                    cs->path, cs->line);
 342     return -1;
 343   }
 344   if(t != 8 && t != 16) {
 345     disorder_error(0, "%s:%d: bad bits-per-sample (%ld)",
 346                    cs->path, cs->line, t);
 347     return -1;
 348   }
 349   if(format) format->bits = (uint8_t)t;
 350   switch (*p) {
 351     case 'l': case 'L': t = ENDIAN_LITTLE; p++; break;
 352     case 'b': case 'B': t = ENDIAN_BIG; p++; break;
 353     default: t = ENDIAN_NATIVE; break;
 354   }
 355   if(format) format->endian = (uint8_t)t;
 356   if(*p != '/') {
 357     disorder_error(errno, "%s:%d: expected `/' after bits-per-sample",
 358           cs->path, cs->line);
 359     return -1;
 360   }
 361   p++;
 362   if(xstrtol(&t, p, &p, 0)) {
 363     disorder_error(errno, "%s:%d: converting sample-rate", cs->path, cs->line);
 364     return -1;
 365   }
 366   if(t < 1 || t > INT_MAX) {
 367     disorder_error(0, "%s:%d: silly sample-rate (%ld)", cs->path, cs->line, t);
 368     return -1;
 369   }
 370   if(format) format->rate = t;
 371   if(*p != '/') {
 372     disorder_error(0, "%s:%d: expected `/' after sample-rate",
 373                    cs->path, cs->line);
 374     return -1;
 375   }
 376   p++;
 377   if(xstrtol(&t, p, &p, 0)) {
 378     disorder_error(errno, "%s:%d: converting channels", cs->path, cs->line);
 379     return -1;
 380   }
 381   if(t < 1 || t > 8) {
 382     disorder_error(0, "%s:%d: silly number (%ld) of channels",
 383                    cs->path, cs->line, t);
 384     return -1;
 385   }
 386   if(format) format->channels = (uint8_t)t;
 387   if(*p) {
 388     disorder_error(0, "%s:%d: junk after channels", cs->path, cs->line);
 389     return -1;
 390   }
 391   return 0;
 392 }
 393
 394 static int set_sample_format(const struct config_state *cs,
 395                              const struct conf *whoami,
 396                              int nvec, char **vec) {
 397   return parse_sample_format(cs, ADDRESS(cs->config, struct stream_header),
 398                              nvec, vec);
 399 }
 400
 401 static int set_namepart(const struct config_state *cs,
 402                         const struct conf *whoami,
 403                         int nvec, char **vec) {
 404   struct namepartlist *npl = ADDRESS(cs->config, struct namepartlist);
 405   unsigned reflags;
 406   regexp *re;
 407   char errstr[RXCERR_LEN];
 408   size_t erroffset;
 409   int n;
 410
 411   if(nvec < 3) {
 412     disorder_error(0, "%s:%d: namepart needs at least 3 arguments",
 413                    cs->path, cs->line);
 414     return -1;
 415   }
 416   if(nvec > 5) {
 417     disorder_error(0, "%s:%d: namepart needs at most 5 arguments",
 418                    cs->path, cs->line);
 419     return -1;
 420   }
 421   reflags = nvec >= 5 ? regsub_flags(vec[4]) : 0;
 422   if(!(re = regexp_compile(vec[1], regsub_compile_options(reflags),
 423                            errstr, sizeof(errstr), &erroffset)))
 424   {
 425     disorder_error(0, "%s:%d: compiling regexp /%s/: %s (offset %zu)",
 426                    cs->path, cs->line, vec[1], errstr, erroffset);
 427     return -1;
 428   }
 429   npl->s = xrealloc(npl->s, (npl->n + 1) * sizeof (struct namepart));
 430   npl->s[npl->n].part = xstrdup(vec[0]);
 431   npl->s[npl->n].re = re;
 432   npl->s[npl->n].res = xstrdup(vec[1]);
 433   npl->s[npl->n].replace = xstrdup(vec[2]);
 434   npl->s[npl->n].context = xstrdup(vec[3]);
 435   npl->s[npl->n].reflags = reflags;
 436   ++npl->n;
 437   /* XXX a bit of a bodge; relies on there being very few parts. */
 438   for(n = 0; (n < cs->config->nparts
 439               && strcmp(cs->config->parts[n], vec[0])); ++n)
 440     ;
 441   if(n >= cs->config->nparts) {
 442     cs->config->parts = xrealloc(cs->config->parts,
 443                                  (cs->config->nparts + 1) * sizeof (char *));
 444     cs->config->parts[cs->config->nparts++] = xstrdup(vec[0]);
 445   }
 446   return 0;
 447 }
 448
 449 static int set_transform(const struct config_state *cs,
 450                          const struct conf *whoami,
 451                          int nvec, char **vec) {
 452   struct transformlist *tl = ADDRESS(cs->config, struct transformlist);
 453   regexp *re;
 454   char errstr[RXCERR_LEN];
 455   unsigned reflags;
 456   size_t erroffset;
 457
 458   if(nvec < 3) {
 459     disorder_error(0, "%s:%d: transform needs at least 3 arguments",
 460                    cs->path, cs->line);
 461     return -1;
 462   }
 463   if(nvec > 5) {
 464     disorder_error(0, "%s:%d: transform needs at most 5 arguments",
 465                    cs->path, cs->line);
 466     return -1;
 467   }
 468   reflags = (nvec >= 5 ? regsub_flags(vec[4]) : 0);
 469   if(!(re = regexp_compile(vec[1], regsub_compile_options(reflags),
 470                            errstr, sizeof(errstr), &erroffset)))
 471   {
 472     disorder_error(0, "%s:%d: compiling regexp /%s/: %s (offset %zu)",
 473                    cs->path, cs->line, vec[1], errstr, erroffset);
 474     return -1;
 475   }
 476   tl->t = xrealloc(tl->t, (tl->n + 1) * sizeof (struct namepart));
 477   tl->t[tl->n].type = xstrdup(vec[0]);
 478   tl->t[tl->n].context = xstrdup(vec[3] ? vec[3] : "*");
 479   tl->t[tl->n].re = re;
 480   tl->t[tl->n].replace = xstrdup(vec[2]);
 481   tl->t[tl->n].flags = reflags;
 482   ++tl->n;
 483   return 0;
 484 }
 485
 486 static int set_rights(const struct config_state *cs,
 487                       const struct conf *whoami,
 488                       int nvec, char **vec) {
 489   if(nvec != 1) {
 490     disorder_error(0, "%s:%d: '%s' requires one argument",
 491                    cs->path, cs->line, whoami->name);
 492     return -1;
 493   }
 494   if(parse_rights(vec[0], 0, 1)) {
 495     disorder_error(0, "%s:%d: invalid rights string '%s'",
 496                    cs->path, cs->line, vec[0]);
 497     return -1;
 498   }
 499   return set_string(cs, whoami, nvec, vec);
 500 }
 501
 502 static int set_netaddress(const struct config_state *cs,
 503                           const struct conf *whoami,
 504                           int nvec, char **vec) {
 505   struct netaddress *na = ADDRESS(cs->config, struct netaddress);
 506
 507   if(netaddress_parse(na, nvec, vec)) {
 508     disorder_error(0, "%s:%d: invalid network address", cs->path, cs->line);
 509     return -1;
 510   }
 511   return 0;
 512 }
 513
 514 /* free functions */
 515
 516 static void free_none(struct config attribute((unused)) *c,
 517                       const struct conf attribute((unused)) *whoami) {
 518 }
 519
 520 static void free_string(struct config *c,
 521                         const struct conf *whoami) {
 522   xfree(VALUE(c, char *));
 523   VALUE(c, char *) = 0;
 524 }
 525
 526 static void free_stringlist(struct config *c,
 527                             const struct conf *whoami) {
 528   int n;
 529   struct stringlist *sl = ADDRESS(c, struct stringlist);
 530
 531   for(n = 0; n < sl->n; ++n)
 532     xfree(sl->s[n]);
 533   xfree(sl->s);
 534 }
 535
 536 static void free_stringlistlist(struct config *c,
 537                                 const struct conf *whoami) {
 538   int n, m;
 539   struct stringlistlist *sll = ADDRESS(c, struct stringlistlist);
 540   struct stringlist *sl;
 541
 542   for(n = 0; n < sll->n; ++n) {
 543     sl = &sll->s[n];
 544     for(m = 0; m < sl->n; ++m)
 545       xfree(sl->s[m]);
 546     xfree(sl->s);
 547   }
 548   xfree(sll->s);
 549 }
 550
 551 static void free_collectionlist(struct config *c,
 552                                 const struct conf *whoami) {
 553   struct collectionlist *cll = ADDRESS(c, struct collectionlist);
 554   struct collection *cl;
 555   int n;
 556
 557   for(n = 0; n < cll->n; ++n) {
 558     cl = &cll->s[n];
 559     xfree(cl->module);
 560     xfree(cl->encoding);
 561     xfree(cl->root);
 562   }
 563   xfree(cll->s);
 564 }
 565
 566 static void free_namepartlist(struct config *c,
 567                               const struct conf *whoami) {
 568   struct namepartlist *npl = ADDRESS(c, struct namepartlist);
 569   struct namepart *np;
 570   int n;
 571
 572   for(n = 0; n < npl->n; ++n) {
 573     np = &npl->s[n];
 574     xfree(np->part);
 575     regexp_free(np->re);
 576     xfree(np->res);
 577     xfree(np->replace);
 578     xfree(np->context);
 579   }
 580   xfree(npl->s);
 581 }
 582
 583 static void free_transformlist(struct config *c,
 584                                const struct conf *whoami) {
 585   struct transformlist *tl = ADDRESS(c, struct transformlist);
 586   struct transform *t;
 587   int n;
 588
 589   for(n = 0; n < tl->n; ++n) {
 590     t = &tl->t[n];
 591     xfree(t->type);
 592     regexp_free(t->re);
 593     xfree(t->replace);
 594     xfree(t->context);
 595   }
 596   xfree(tl->t);
 597 }
 598
 599 static void free_netaddress(struct config *c,
 600                             const struct conf *whoami) {
 601   struct netaddress *na = ADDRESS(c, struct netaddress);
 602
 603   xfree(na->address);
 604 }
 605
 606 /* configuration types */
 607
 608 static const struct conftype
 609   type_signal = { set_signal, free_none },
 610   type_collections = { set_collections, free_collectionlist },
 611   type_boolean = { set_boolean, free_none },
 612   type_string = { set_string, free_string },
 613   type_integer = { set_integer, free_none },
 614   type_stringlist_accum = { set_stringlist_accum, free_stringlistlist },
 615   type_string_accum = { set_string_accum, free_stringlist },
 616   type_sample_format = { set_sample_format, free_none },
 617   type_namepart = { set_namepart, free_namepartlist },
 618   type_transform = { set_transform, free_transformlist },
 619   type_netaddress = { set_netaddress, free_netaddress },
 620   type_rights = { set_rights, free_string };
 621
 622 /* specific validation routine */
 623
 624 /** @brief Perform a test on a filename
 625  * @param test Test function to call on mode bits
 626  * @param what Type of file sought
 627  *
 628  * If @p test returns 0 then the file is not a @p what and an error
 629  * is reported and -1 is returned.
 630  */
 631 #define VALIDATE_FILE(test, what) do {                  \
 632   struct stat sb;                                       \
 633   int n;                                                \
 634                                                         \
 635   for(n = 0; n < nvec; ++n) {                           \
 636     if(stat(vec[n], &sb) < 0) {                         \
 637       disorder_error(errno, "%s:%d: %s",                \
 638                      cs->path, cs->line, vec[n]);       \
 639       return -1;                                        \
 640     }                                                   \
 641     if(!test(sb.st_mode)) {                             \
 642       disorder_error(0, "%s:%d: %s is not a %s",        \
 643                      cs->path, cs->line, vec[n], what); \
 644       return -1;                                        \
 645     }                                                   \
 646   }                                                     \
 647 } while(0)
 648
 649 /** @brief Validate an absolute path
 650  * @param cs Configuration state
 651  * @param nvec Length of (proposed) new value
 652  * @param vec Elements of new value
 653  * @return 0 on success, non-0 on error
 654  */
 655 static int validate_isabspath(const struct config_state *cs,
 656                               int nvec, char **vec) {
 657   int n;
 658
 659   for(n = 0; n < nvec; ++n)
 660     if(vec[n][0] != '/') {
 661       disorder_error(0, "%s:%d: %s: not an absolute path",
 662                      cs->path, cs->line, vec[n]);
 663       return -1;
 664     }
 665   return 0;
 666 }
 667
 668 /** @brief Validate an existing directory
 669  * @param cs Configuration state
 670  * @param nvec Length of (proposed) new value
 671  * @param vec Elements of new value
 672  * @return 0 on success, non-0 on error
 673  */
 674 static int validate_isdir(const struct config_state *cs,
 675                           int nvec, char **vec) {
 676   VALIDATE_FILE(S_ISDIR, "directory");
 677   return 0;
 678 }
 679
 680 /** @brief Validate an existing regular file
 681  * @param cs Configuration state
 682  * @param nvec Length of (proposed) new value
 683  * @param vec Elements of new value
 684  * @return 0 on success, non-0 on error
 685  */
 686 static int validate_isreg(const struct config_state *cs,
 687                           int nvec, char **vec) {
 688   VALIDATE_FILE(S_ISREG, "regular file");
 689   return 0;
 690 }
 691
 692 /** @brief Validate a player pattern
 693  * @param cs Configuration state
 694  * @param nvec Length of (proposed) new value
 695  * @param vec Elements of new value
 696  * @return 0 on success, non-0 on error
 697  */
 698 static int validate_player(const struct config_state *cs,
 699                            int nvec,
 700                            char attribute((unused)) **vec) {
 701   if(nvec && nvec < 2) {
 702     disorder_error(0, "%s:%d: should be at least 'player PATTERN MODULE'",
 703                    cs->path, cs->line);
 704     return -1;
 705   }
 706   return 0;
 707 }
 708
 709 /** @brief Validate a track length pattern
 710  * @param cs Configuration state
 711  * @param nvec Length of (proposed) new value
 712  * @param vec Elements of new value
 713  * @return 0 on success, non-0 on error
 714  */
 715 static int validate_tracklength(const struct config_state *cs,
 716                                 int nvec,
 717                                 char attribute((unused)) **vec) {
 718   if(nvec && nvec < 2) {
 719     disorder_error(0, "%s:%d: should be at least 'tracklength PATTERN MODULE'",
 720                    cs->path, cs->line);
 721     return -1;
 722   }
 723   return 0;
 724 }
 725
 726 /** @brief Common code for validating integer values
 727  * @param cs Configuration state
 728  * @param nvec Length of (proposed) new value
 729  * @param vec Elements of new value
 730  * @param n_out Where to put the value
 731  */
 732 static int common_validate_integer(const struct config_state *cs,
 733                                    int nvec, char **vec, long *n_out) {
 734   char errbuf[1024];
 735
 736   if(nvec < 1) {
 737     disorder_error(0, "%s:%d: missing argument", cs->path, cs->line);
 738     return -1;
 739   }
 740   if(nvec > 1) {
 741     disorder_error(0, "%s:%d: too many arguments", cs->path, cs->line);
 742     return -1;
 743   }
 744   if(xstrtol(n_out, vec[0], 0, 0)) {
 745     disorder_error(0, "%s:%d: %s", cs->path, cs->line,
 746                    format_error(ec_errno, errno, errbuf, sizeof errbuf));
 747     return -1;
 748   }
 749   return 0;
 750 }
 751
 752 /** @brief Validate a non-negative (@c long) integer
 753  * @param cs Configuration state
 754  * @param nvec Length of (proposed) new value
 755  * @param vec Elements of new value
 756  * @return 0 on success, non-0 on error
 757  */
 758 static int validate_non_negative(const struct config_state *cs,
 759                                  int nvec, char **vec) {
 760   long n;
 761   if(common_validate_integer(cs, nvec, vec, &n)) return -1;
 762   if(n < 0) {
 763     disorder_error(0, "%s:%d: must not be negative", cs->path, cs->line);
 764     return -1;
 765   }
 766   return 0;
 767 }
 768
 769 /** @brief Validate a positive (@c long) integer
 770  * @param cs Configuration state
 771  * @param nvec Length of (proposed) new value
 772  * @param vec Elements of new value
 773  * @return 0 on success, non-0 on error
 774  */
 775 static int validate_positive(const struct config_state *cs,
 776                           int nvec, char **vec) {
 777   long n;
 778   if(common_validate_integer(cs, nvec, vec, &n)) return -1;
 779   if(n <= 0) {
 780     disorder_error(0, "%s:%d: must be positive", cs->path, cs->line);
 781     return -1;
 782   }
 783   return 0;
 784 }
 785
 786 #if !_WIN32
 787 /** @brief Validate a system username
 788  * @param cs Configuration state
 789  * @param nvec Length of (proposed) new value
 790  * @param vec Elements of new value
 791  * @return 0 on success, non-0 on error
 792  */
 793 static int validate_isauser(const struct config_state *cs,
 794                             int attribute((unused)) nvec,
 795                             char **vec) {
 796   if(!getpwnam(vec[0])) {
 797     disorder_error(0, "%s:%d: no such user as '%s'", cs->path, cs->line, vec[0]);
 798     return -1;
 799   }
 800   return 0;
 801 }
 802 #endif
 803
 804 /** @brief Validate a sample format string
 805  * @param cs Configuration state
 806  * @param nvec Length of (proposed) new value
 807  * @param vec Elements of new value
 808  * @return 0 on success, non-0 on error
 809  */
 810 static int validate_sample_format(const struct config_state *cs,
 811                                   int attribute((unused)) nvec,
 812                                   char **vec) {
 813   return parse_sample_format(cs, 0, nvec, vec);
 814 }
 815
 816 /** @brief Validate anything
 817  * @param cs Configuration state
 818  * @param nvec Length of (proposed) new value
 819  * @param vec Elements of new value
 820  * @return 0
 821  */
 822 static int validate_any(const struct config_state attribute((unused)) *cs,
 823                         int attribute((unused)) nvec,
 824                         char attribute((unused)) **vec) {
 825   return 0;
 826 }
 827
 828 /** @brief Validate a URL
 829  * @param cs Configuration state
 830  * @param nvec Length of (proposed) new value
 831  * @param vec Elements of new value
 832  * @return 0 on success, non-0 on error
 833  *
 834  * Rather cursory.
 835  */
 836 static int validate_url(const struct config_state attribute((unused)) *cs,
 837                         int attribute((unused)) nvec,
 838                         char **vec) {
 839   const char *s;
 840   int n;
 841   /* absoluteURI   = scheme ":" ( hier_part | opaque_part )
 842      scheme        = alpha *( alpha | digit | "+" | "-" | "." ) */
 843   s = vec[0];
 844   n = strspn(s, ("abcdefghijklmnopqrstuvwxyz"
 845                  "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
 846                  "0123456789"));
 847   if(s[n] != ':') {
 848     disorder_error(0, "%s:%d: invalid url '%s'", cs->path, cs->line, vec[0]);
 849     return -1;
 850   }
 851   if(!strncmp(s, "http:", 5)
 852      || !strncmp(s, "https:", 6)) {
 853     s += n + 1;
 854     /* we only do a rather cursory check */
 855     if(strncmp(s, "//", 2)) {
 856       disorder_error(0, "%s:%d: invalid url '%s'", cs->path, cs->line, vec[0]);
 857       return -1;
 858     }
 859   }
 860   return 0;
 861 }
 862
 863 /** @brief Validate an alias pattern
 864  * @param cs Configuration state
 865  * @param nvec Length of (proposed) new value
 866  * @param vec Elements of new value
 867  * @return 0 on success, non-0 on error
 868  */
 869 static int validate_alias(const struct config_state *cs,
 870                           int nvec,
 871                           char **vec) {
 872   const char *s;
 873   int in_brackets = 0, c;
 874
 875   if(nvec < 1) {
 876     disorder_error(0, "%s:%d: missing argument", cs->path, cs->line);
 877     return -1;
 878   }
 879   if(nvec > 1) {
 880     disorder_error(0, "%s:%d: too many arguments", cs->path, cs->line);
 881     return -1;
 882   }
 883   s = vec[0];
 884   while((c = (unsigned char)*s++)) {
 885     if(in_brackets) {
 886       if(c == '}')
 887         in_brackets = 0;
 888       else if(!isalnum(c)) {
 889         disorder_error(0, "%s:%d: invalid part name in alias expansion in '%s'",
 890                        cs->path, cs->line, vec[0]);
 891           return -1;
 892       }
 893     } else {
 894       if(c == '{') {
 895         in_brackets = 1;
 896         if(*s == '/')
 897           ++s;
 898       } else if(c == '\\') {
 899         if(!(c = (unsigned char)*s++)) {
 900           disorder_error(0, "%s:%d: unterminated escape in alias expansion in '%s'",
 901                          cs->path, cs->line, vec[0]);
 902           return -1;
 903         } else if(c != '\\' && c != '{') {
 904           disorder_error(0, "%s:%d: invalid escape in alias expansion in '%s'",
 905                          cs->path, cs->line, vec[0]);
 906           return -1;
 907         }
 908       }
 909     }
 910     ++s;
 911   }
 912   if(in_brackets) {
 913     disorder_error(0,
 914                    "%s:%d: unterminated part name in alias expansion in '%s'",
 915                    cs->path, cs->line, vec[0]);
 916     return -1;
 917   }
 918   return 0;
 919 }
 920
 921 /** @brief Validate a hash algorithm name
 922  * @param cs Configuration state
 923  * @param nvec Length of (proposed) new value
 924  * @param vec Elements of new value
 925  * @return 0 on success, non-0 on error
 926  */
 927 static int validate_algo(const struct config_state attribute((unused)) *cs,
 928                          int nvec,
 929                          char **vec) {
 930   if(nvec != 1) {
 931     disorder_error(0, "%s:%d: invalid algorithm specification", cs->path, cs->line);
 932     return -1;
 933   }
 934   if(!valid_authhash(vec[0])) {
 935     disorder_error(0, "%s:%d: unsuported algorithm '%s'", cs->path, cs->line, vec[0]);
 936     return -1;
 937   }
 938   return 0;
 939 }
 940
 941 #if !_WIN32
 942 /** @brief Validate a playback backend name
 943  * @param cs Configuration state
 944  * @param nvec Length of (proposed) new value
 945  * @param vec Elements of new value
 946  * @return 0 on success, non-0 on error
 947  */
 948 static int validate_backend(const struct config_state attribute((unused)) *cs,
 949                             int nvec,
 950                             char **vec) {
 951   int n;
 952   if(nvec != 1) {
 953     disorder_error(0, "%s:%d: invalid sound API specification", cs->path, cs->line);
 954     return -1;
 955   }
 956   if(!strcmp(vec[0], "network")) {
 957     disorder_error(0, "'api network' is deprecated; use 'api rtp'");
 958     return 0;
 959   }
 960   if(config_uaudio_apis) {
 961     for(n = 0; config_uaudio_apis[n]; ++n)
 962       if(!strcmp(vec[0], config_uaudio_apis[n]->name))
 963         return 0;
 964     disorder_error(0, "%s:%d: unrecognized sound API '%s'", cs->path, cs->line, vec[0]);
 965     return -1;
 966   }
 967   /* In non-server processes we have no idea what's valid */
 968   return 0;
 969 }
 970 #endif
 971
 972 /** @brief Validate a pause mode string
 973  * @param cs Configuration state
 974  * @param nvec Length of (proposed) new value
 975  * @param vec Elements of new value
 976  * @return 0 on success, non-0 on error
 977  */
 978 static int validate_pausemode(const struct config_state attribute((unused)) *cs,
 979                               int nvec,
 980                               char **vec) {
 981   if(nvec == 1 && (!strcmp(vec[0], "silence") || !strcmp(vec[0], "suspend")))
 982     return 0;
 983   disorder_error(0, "%s:%d: invalid pause mode", cs->path, cs->line);
 984   return -1;
 985 }
 986
 987 /** @brief Validate a destination network address
 988  * @param cs Configuration state
 989  * @param nvec Length of (proposed) new value
 990  * @param vec Elements of new value
 991  * @return 0 on success, non-0 on error
 992  *
 993  * By a destination address, it is meant that it must not be a wildcard
 994  * address.
 995  */
 996 static int validate_destaddr(const struct config_state attribute((unused)) *cs,
 997                              int nvec,
 998                              char **vec) {
 999   struct netaddress na[1];
1000
1001   if(netaddress_parse(na, nvec, vec)) {
1002     disorder_error(0, "%s:%d: invalid network address", cs->path, cs->line);
1003     return -1;
1004   }
1005   if(!na->address) {
1006     disorder_error(0, "%s:%d: destination address required", cs->path, cs->line);
1007     return -1;
1008   }
1009   xfree(na->address);
1010   return 0;
1011 }
1012
1013 /** @brief Validate an internet address
1014  * @param cs Configuration state
1015  * @param nvec Length of (proposed) new value
1016  * @param vec Elements of new value
1017  * @return 0 on success, non-0 on error
1018  *
1019  * By a destination address, it is meant that it must be either IPv4 or IPv6.
1020  */
1021 static int validate_inetaddr(const struct config_state *cs,
1022                              int nvec, char **vec) {
1023   struct netaddress na[1];
1024
1025   if(netaddress_parse(na, nvec, vec)) {
1026     disorder_error(0, "%s:%d: invalid network address", cs->path, cs->line);
1027     return -1;
1028   }
1029   switch(na->af) {
1030     case AF_INET: case AF_INET6: case AF_UNSPEC: break;
1031     default:
1032       disorder_error(0, "%s:%d: must be an intenet address",
1033                      cs->path, cs->line);
1034       return -1;
1035   }
1036   return 0;
1037 }
1038
1039 /** @brief Item name and and offset */
1040 #define C(x) #x, offsetof(struct config, x)
1041 /** @brief Item name and and offset */
1042 #define C2(x,y) #x, offsetof(struct config, y)
1043
1044 /** @brief All configuration items */
1045 static const struct conf conf[] = {
1046   { C(alias),            &type_string,           validate_alias },
1047 #if !_WIN32
1048   { C(api),              &type_string,           validate_backend },
1049 #endif
1050   { C(authorization_algorithm), &type_string,    validate_algo },
1051   { C(broadcast),        &type_netaddress,       validate_destaddr },
1052   { C(broadcast_from),   &type_netaddress,       validate_any },
1053   { C(channel),          &type_string,           validate_any },
1054   { C(checkpoint_kbyte), &type_integer,          validate_non_negative },
1055   { C(checkpoint_min),   &type_integer,          validate_non_negative },
1056   { C(collection),       &type_collections,      validate_any },
1057   { C(connect),          &type_netaddress,       validate_destaddr },
1058   { C(cookie_key_lifetime),  &type_integer,      validate_positive },
1059   { C(cookie_login_lifetime),  &type_integer,    validate_positive },
1060   { C(dbversion),        &type_integer,          validate_positive },
1061   { C(default_rights),   &type_rights,           validate_any },
1062   { C(device),           &type_string,           validate_any },
1063   { C(history),          &type_integer,          validate_positive },
1064 #if !_WIN32
1065   { C(home),             &type_string,           validate_isabspath },
1066 #endif
1067   { C(listen),           &type_netaddress,       validate_any },
1068   { C(mail_sender),      &type_string,           validate_any },
1069   { C(mixer),            &type_string,           validate_any },
1070   { C(mount_rescan),     &type_boolean,          validate_any },
1071   { C(multicast_loop),   &type_boolean,          validate_any },
1072   { C(multicast_ttl),    &type_integer,          validate_non_negative },
1073   { C(namepart),         &type_namepart,         validate_any },
1074   { C(new_bias),         &type_integer,          validate_positive },
1075   { C(new_bias_age),     &type_integer,          validate_positive },
1076   { C(new_max),          &type_integer,          validate_positive },
1077   { C2(nice, nice_rescan), &type_integer,        validate_non_negative },
1078   { C(nice_rescan),      &type_integer,          validate_non_negative },
1079   { C(nice_server),      &type_integer,          validate_any },
1080   { C(nice_speaker),     &type_integer,          validate_any },
1081   { C(noticed_history),  &type_integer,          validate_positive },
1082   { C(password),         &type_string,           validate_any },
1083   { C(pause_mode),       &type_string,           validate_pausemode },
1084   { C(player),           &type_stringlist_accum, validate_player },
1085   { C(playlist_lock_timeout), &type_integer,     validate_positive },
1086   { C(playlist_max) ,    &type_integer,          validate_positive },
1087   { C(plugins),          &type_string_accum,     validate_isdir },
1088   { C(queue_pad),        &type_integer,          validate_positive },
1089   { C(refresh),          &type_integer,          validate_positive },
1090   { C(refresh_min),      &type_integer,          validate_non_negative },
1091   { C(reminder_interval), &type_integer,         validate_positive },
1092   { C(remote_userman),   &type_boolean,          validate_any },
1093   { C(replay_min),       &type_integer,          validate_non_negative },
1094   { C(rtp_always_request), &type_boolean,        validate_any },
1095   { C(rtp_delay_threshold), &type_integer,       validate_positive },
1096   { C(rtp_max_payload),  &type_integer,          validate_positive },
1097   { C(rtp_maxbuffer),    &type_integer,          validate_non_negative },
1098   { C(rtp_minbuffer),    &type_integer,          validate_non_negative },
1099   { C(rtp_mode),         &type_string,           validate_any },
1100   { C(rtp_rcvbuf),       &type_integer,          validate_non_negative },
1101   { C(rtp_request_address), &type_netaddress,    validate_inetaddr },
1102   { C(rtp_verbose),      &type_boolean,          validate_any },
1103   { C(sample_format),    &type_sample_format,    validate_sample_format },
1104   { C(scratch),          &type_string_accum,     validate_isreg },
1105 #if !_WIN32
1106   { C(sendmail),         &type_string,           validate_isabspath },
1107 #endif
1108   { C(short_display),    &type_integer,          validate_positive },
1109   { C(signal),           &type_signal,           validate_any },
1110   { C(smtp_server),      &type_string,           validate_any },
1111   { C(sox_generation),   &type_integer,          validate_non_negative },
1112 #if !_WIN32
1113   { C2(speaker_backend, api),  &type_string,     validate_backend },
1114 #endif
1115   { C(speaker_command),  &type_string,           validate_any },
1116   { C(stopword),         &type_string_accum,     validate_any },
1117   { C(templates),        &type_string_accum,     validate_isdir },
1118   { C(tracklength),      &type_stringlist_accum, validate_tracklength },
1119   { C(transform),        &type_transform,        validate_any },
1120   { C(url),              &type_string,           validate_url },
1121 #if !_WIN32
1122   { C(user),             &type_string,           validate_isauser },
1123 #endif
1124   { C(username),         &type_string,           validate_any },
1125 };
1126
1127 /** @brief Find a configuration item's definition by key */
1128 static const struct conf *find(const char *key) {
1129   int n;
1130
1131   if((n = TABLE_FIND(conf, name, key)) < 0)
1132     return 0;
1133   return &conf[n];
1134 }
1135
1136 /** @brief Set a new configuration value
1137  * @param cs Configuration state
1138  * @param nvec Length of @p vec
1139  * @param vec Name and new value
1140  * @return 0 on success, non-0 on error.
1141  *
1142  * @c vec[0] is the name, the rest is the value.
1143  */
1144 static int config_set(const struct config_state *cs,
1145                       int nvec, char **vec) {
1146   const struct conf *which;
1147
1148   D(("config_set %s", vec[0]));
1149   if(!(which = find(vec[0]))) {
1150     disorder_error(0, "%s:%d: unknown configuration key '%s'",
1151           cs->path, cs->line, vec[0]);
1152     return -1;
1153   }
1154   return (which->validate(cs, nvec - 1, vec + 1)
1155           || which->type->set(cs, which, nvec - 1, vec + 1));
1156 }
1157
1158 /** @brief Set a configuration item from parameters
1159  * @param cs Configuration state
1160  * @param which Item to set
1161  * @param ... Value as strings, terminated by (char *)NULL
1162  * @return 0 on success, non-0 on error
1163  */
1164 static int config_set_args(const struct config_state *cs,
1165                            const char *which, ...) {
1166   va_list ap;
1167   struct vector v[1];
1168   char *s;
1169   int rc;
1170
1171   vector_init(v);
1172   vector_append(v, (char *)which);
1173   va_start(ap, which);
1174   while((s = va_arg(ap, char *)))
1175     vector_append(v, s);
1176   va_end(ap);
1177   vector_terminate(v);
1178   rc = config_set(cs, v->nvec, v->vec);
1179   xfree(v->vec);
1180   return rc;
1181 }
1182
1183 /** @brief Error callback used by config_include()
1184  * @param msg Error message
1185  * @param u User data (@ref config_state)
1186  */
1187 static void config_error(const char *msg, void *u) {
1188   const struct config_state *cs = u;
1189
1190   disorder_error(0, "%s:%d: %s", cs->path, cs->line, msg);
1191 }
1192
1193 /** @brief Include a file by name
1194  * @param c Configuration to update
1195  * @param path Path to read
1196  * @return 0 on success, non-0 on error
1197  */
1198 static int config_include(struct config *c, const char *path) {
1199   FILE *fp;
1200   char *buffer, *inputbuffer, **vec;
1201   int n, ret = 0;
1202   struct config_state cs;
1203
1204   cs.path = path;
1205   cs.line = 0;
1206   cs.config = c;
1207   D(("%s: reading configuration", path));
1208   if(!(fp = fopen(path, "r"))) {
1209     disorder_error(errno, "error opening %s", path);
1210     return -1;
1211   }
1212   while(!inputline(path, fp, &inputbuffer, '\n')) {
1213     ++cs.line;
1214     if(!(buffer = mb2utf8(inputbuffer))) {
1215       disorder_error(errno, "%s:%d: cannot convert to UTF-8", cs.path, cs.line);
1216       ret = -1;
1217       xfree(inputbuffer);
1218       continue;
1219     }
1220     xfree(inputbuffer);
1221     if(!(vec = split(buffer, &n, SPLIT_COMMENTS|SPLIT_QUOTES,
1222                      config_error, &cs))) {
1223       ret = -1;
1224       xfree(buffer);
1225       continue;
1226     }
1227     if(n) {
1228       /* 'include' is special-cased */
1229       if(!strcmp(vec[0], "include")) {
1230         if(n != 2) {
1231           disorder_error(0, "%s:%d: must be 'include PATH'", cs.path, cs.line);
1232           ret = -1;
1233         } else
1234           config_include(c, vec[1]);
1235       } else
1236         ret |= config_set(&cs, n, vec);
1237     }
1238     for(n = 0; vec[n]; ++n) xfree(vec[n]);
1239     xfree(vec);
1240     xfree(buffer);
1241   }
1242   if(ferror(fp)) {
1243     disorder_error(errno, "error reading %s", path);
1244     ret = -1;
1245   }
1246   fclose(fp);
1247   return ret;
1248 }
1249
1250 /** @brief Default stopword setting */
1251 static const char *const default_stopwords[] = {
1252   "stopword",
1253
1254   "01",
1255   "02",
1256   "03",
1257   "04",
1258   "05",
1259   "06",
1260   "07",
1261   "08",
1262   "09",
1263   "1",
1264   "10",
1265   "11",
1266   "12",
1267   "13",
1268   "14",
1269   "15",
1270   "16",
1271   "17",
1272   "18",
1273   "19",
1274   "2",
1275   "20",
1276   "21",
1277   "22",
1278   "23",
1279   "24",
1280   "25",
1281   "26",
1282   "27",
1283   "28",
1284   "29",
1285   "3",
1286   "30",
1287   "4",
1288   "5",
1289   "6",
1290   "7",
1291   "8",
1292   "9",
1293   "a",
1294   "am",
1295   "an",
1296   "and",
1297   "as",
1298   "for",
1299   "i",
1300   "im",
1301   "in",
1302   "is",
1303   "of",
1304   "on",
1305   "the",
1306   "to",
1307   "too",
1308   "we",
1309 };
1310 #define NDEFAULT_STOPWORDS (sizeof default_stopwords / sizeof *default_stopwords)
1311
1312 /** @brief Default player patterns */
1313 static const char *const default_players[] = {
1314   "*.ogg",
1315   "*.flac",
1316   "*.mp3",
1317   "*.wav",
1318 };
1319 #define NDEFAULT_PLAYERS (sizeof default_players / sizeof *default_players)
1320
1321 /** @brief Make a new default configuration
1322  * @return New configuration
1323  */
1324 static struct config *config_default(void) {
1325   struct config *c = xmalloc(sizeof *c);
1326 #if !_WIN32
1327   const char *logname;
1328   struct passwd *pw;
1329 #endif
1330   struct config_state cs;
1331   size_t n;
1332
1333   cs.path = "<internal>";
1334   cs.line = 0;
1335   cs.config = c;
1336   /* Strings had better be xstrdup'd as they will get freed at some point. */
1337   c->history = 60;
1338 #if !_WIN32
1339   c->home = xstrdup(pkgstatedir);
1340 #endif
1341 #if _WIN32
1342   {
1343     char buffer[128];
1344     DWORD bufsize = sizeof buffer;
1345     if(!GetUserNameA(buffer, &bufsize))
1346       disorder_fatal(0, "cannot determine our username");
1347     c->username = xstrdup(buffer);
1348   }
1349 #else
1350   if(!(pw = getpwuid(getuid())))
1351     disorder_fatal(0, "cannot determine our username");
1352   logname = pw->pw_name;
1353   c->username = xstrdup(logname);
1354 #endif
1355   c->refresh = 15;
1356   c->refresh_min = 1;
1357 #ifdef SIGKILL
1358   c->signal = SIGKILL;
1359 #else
1360   c->signal = SIGTERM;
1361 #endif
1362   c->alias = xstrdup("{/artist}{/album}{/title}{ext}");
1363   c->device = xstrdup("default");
1364   c->nice_rescan = 10;
1365   c->speaker_command = 0;
1366   c->sample_format.bits = 16;
1367   c->sample_format.rate = 44100;
1368   c->sample_format.channels = 2;
1369   c->sample_format.endian = ENDIAN_NATIVE;
1370   c->queue_pad = 10;
1371   c->replay_min = 8 * 3600;
1372   c->api = NULL;
1373   c->multicast_ttl = 1;
1374   c->multicast_loop = 1;
1375   c->authorization_algorithm = xstrdup("sha1");
1376   c->noticed_history = 31;
1377   c->short_display = 32;
1378   c->mixer = 0;
1379   c->channel = 0;
1380   c->dbversion = 2;
1381   c->cookie_login_lifetime = 86400;
1382   c->cookie_key_lifetime = 86400 * 7;
1383 #if !_WIN32
1384   if(sendmail_binary[0] && strcmp(sendmail_binary, "none"))
1385     c->sendmail = xstrdup(sendmail_binary);
1386 #endif
1387   c->smtp_server = xstrdup("127.0.0.1");
1388   c->new_max = 100;
1389   c->reminder_interval = 600;           /* 10m */
1390   c->new_bias_age = 7 * 86400;          /* 1 week */
1391   c->new_bias = 4500000;                /* 50 times the base weight */
1392   c->sox_generation = DEFAULT_SOX_GENERATION;
1393   c->playlist_max = INT_MAX;            /* effectively no limit */
1394   c->playlist_lock_timeout = 10;        /* 10s */
1395   c->mount_rescan = 1;
1396   /* Default stopwords */
1397   if(config_set(&cs, (int)NDEFAULT_STOPWORDS, (char **)default_stopwords))
1398     exit(1);
1399   /* Default player configuration */
1400   for(n = 0; n < NDEFAULT_PLAYERS; ++n) {
1401     if(config_set_args(&cs, "player",
1402                        default_players[n], "execraw", "disorder-decode", (char *)0))
1403       exit(1);
1404     if(config_set_args(&cs, "tracklength",
1405                        default_players[n], "disorder-tracklength", (char *)0))
1406       exit(1);
1407   }
1408   c->broadcast.af = -1;
1409   c->broadcast_from.af = -1;
1410   c->listen.af = -1;
1411   c->connect.af = -1;
1412   c->rtp_mode = xstrdup("auto");
1413   c->rtp_max_payload = -1;
1414   return c;
1415 }
1416
1417 #if !_WIN32
1418 /** @brief Construct a filename
1419  * @param c Configuration
1420  * @param name Base filename
1421  * @return Full filename
1422  *
1423  * Usually use config_get_file() instead.
1424  */
1425 char *config_get_file2(struct config *c, const char *name) {
1426   char *s;
1427
1428   byte_xasprintf(&s, "%s/%s", c->home, name);
1429   return s;
1430 }
1431 #endif
1432
1433 /** @brief Set the default configuration file */
1434 static void set_configfile(void) {
1435 #if !_WIN32
1436   if(!configfile)
1437     byte_xasprintf(&configfile, "%s/config", pkgconfdir);
1438 #endif
1439 }
1440
1441 /** @brief Free a configuration object
1442  * @param c Configuration to free
1443  *
1444  * @p c is indeterminate after this function is called.
1445  */
1446 void config_free(struct config *c) {
1447   int n;
1448
1449   if(c) {
1450     for(n = 0; n < (int)(sizeof conf / sizeof *conf); ++n)
1451       conf[n].type->free(c, &conf[n]);
1452     for(n = 0; n < c->nparts; ++n)
1453       xfree(c->parts[n]);
1454     xfree(c->parts);
1455     xfree(c);
1456   }
1457 }
1458
1459 /** @brief Set post-parse defaults
1460  * @param c Configuration to update
1461  * @param server True when running in the server
1462  *
1463  * If @p server is set then certain parts of the configuration are more
1464  * strictly validated.
1465  */
1466 static void config_postdefaults(struct config *c,
1467                                 int server) {
1468   struct config_state cs;
1469   const struct conf *whoami;
1470   int n;
1471
1472   static const char *namepart[][4] = {
1473     { "title",  "/([0-9]+ *[-:]? *)?([^/]+)\\.[a-zA-Z0-9]+$", "$2", "display" },
1474     { "title",  "/([^/]+)\\.[a-zA-Z0-9]+$",           "$1", "sort" },
1475     { "album",  "/([^/]+)/[^/]+$",                    "$1", "*" },
1476     { "artist", "/([^/]+)/[^/]+/[^/]+$",              "$1", "*" },
1477     { "ext",    "(\\.[a-zA-Z0-9]+)$",                 "$1", "*" },
1478   };
1479 #define NNAMEPART (int)(sizeof namepart / sizeof *namepart)
1480
1481   static const char *transform[][5] = {
1482     { "track", "^.*/([0-9]+ *[-:]? *)?([^/]+)\\.[a-zA-Z0-9]+$", "$2", "display", "" },
1483     { "track", "^.*/([^/]+)\\.[a-zA-Z0-9]+$",           "$1", "sort", "" },
1484     { "dir",   "^.*/([^/]+)$",                          "$1", "*", "" },
1485     { "dir",   "^(the) ([^/]*)",                        "$2, $1", "sort", "i", },
1486     { "dir",   "[[:punct:]]",                           "", "sort", "g", }
1487   };
1488 #define NTRANSFORM (int)(sizeof transform / sizeof *transform)
1489
1490   cs.path = "<internal>";
1491   cs.line = 0;
1492   cs.config = c;
1493   if(!c->namepart.n) {
1494     whoami = find("namepart");
1495     for(n = 0; n < NNAMEPART; ++n)
1496       set_namepart(&cs, whoami, 4, (char **)namepart[n]);
1497   }
1498   if(!c->transform.n) {
1499     whoami = find("transform");
1500     for(n = 0; n < NTRANSFORM; ++n)
1501       set_transform(&cs, whoami, 5, (char **)transform[n]);
1502   }
1503   if(!c->api) {
1504     if(c->speaker_command)
1505       c->api = xstrdup("command");
1506     else if(c->broadcast.af != -1)
1507       c->api = xstrdup("rtp");
1508 #if !_WIN32
1509     else if(config_uaudio_apis)
1510       c->api = xstrdup(uaudio_default(config_uaudio_apis,
1511                                       UAUDIO_API_SERVER)->name);
1512 #endif
1513     else
1514       c->api = xstrdup("<none>");
1515   }
1516   if(!strcmp(c->api, "network"))
1517     c->api = xstrdup("rtp");
1518   if(server) {
1519     if(!strcmp(c->api, "command") && !c->speaker_command)
1520       disorder_fatal(0, "'api command' but speaker_command is not set");
1521     if((!strcmp(c->api, "rtp")) &&
1522        c->broadcast.af == -1 && strcmp(c->rtp_mode, "request"))
1523       disorder_fatal(0, "'api rtp' but broadcast is not set "
1524                      "and mode is not not 'request'");
1525   }
1526   /* Override sample format */
1527   if(!strcmp(c->api, "rtp")) {
1528     c->sample_format.rate = 44100;
1529     c->sample_format.channels = 2;
1530     c->sample_format.bits = 16;
1531     c->sample_format.endian = ENDIAN_NATIVE;
1532   }
1533   if(!strcmp(c->api, "coreaudio")) {
1534     c->sample_format.rate = 44100;
1535     c->sample_format.channels = 2;
1536     c->sample_format.bits = 16;
1537     c->sample_format.endian = ENDIAN_NATIVE;
1538   }
1539   if(!c->default_rights) {
1540     rights_type r = RIGHTS__MASK & ~(RIGHT_ADMIN|RIGHT_REGISTER
1541                                      |RIGHT_MOVE__MASK
1542                                      |RIGHT_SCRATCH__MASK
1543                                      |RIGHT_REMOVE__MASK);
1544     r |= RIGHT_SCRATCH_ANY|RIGHT_MOVE_ANY|RIGHT_REMOVE_ANY;
1545     c->default_rights = rights_string(r);
1546   }
1547 }
1548
1549 /** @brief (Re-)read the config file
1550  * @param server If set, do extra checking
1551  * @param oldconfig Old configuration for compatibility check
1552  * @return 0 on success, non-0 on error
1553  *
1554  * If @p oldconfig is set, then certain compatibility checks are done between
1555  * the old and new configurations.
1556  */
1557 int config_read(int server,
1558                 const struct config *oldconfig) {
1559   struct config *c;
1560   char *privconf;
1561   struct passwd *pw = NULL;
1562
1563   set_configfile();
1564   c = config_default();
1565   /* standalone client installs might not have a global config file */
1566   if(configfile)
1567     if(access(configfile, F_OK) == 0)
1568       if(config_include(c, configfile))
1569         return -1;
1570   /* if we can read the private config file, do */
1571   if((privconf = config_private())
1572      && access(privconf, R_OK) == 0
1573      && config_include(c, privconf))
1574     return -1;
1575   xfree(privconf);
1576   /* if there's a per-user system config file for this user, read it */
1577   if(config_per_user) {
1578 #if !_WIN32
1579     if(!(pw = getpwuid(getuid())))
1580       disorder_fatal(0, "cannot determine our username");
1581     if((privconf = config_usersysconf(pw))
1582        && access(privconf, F_OK) == 0
1583        && config_include(c, privconf))
1584       return -1;
1585     xfree(privconf);
1586 #endif
1587     /* if we have a password file, read it */
1588     if((privconf = config_userconf(0, pw))
1589        && access(privconf, F_OK) == 0
1590        && config_include(c, privconf))
1591       return -1;
1592     xfree(privconf);
1593   }
1594   /* install default namepart and transform settings */
1595   config_postdefaults(c, server);
1596   if(oldconfig)  {
1597     int failed = 0;
1598 #if !_WIN32
1599     if(strcmp(c->home, oldconfig->home)) {
1600       disorder_error(0, "'home' cannot be changed without a restart");
1601       failed = 1;
1602     }
1603 #endif
1604     if(strcmp(c->alias, oldconfig->alias)) {
1605       disorder_error(0, "'alias' cannot be changed without a restart");
1606       failed = 1;
1607     }
1608     if(strcmp(c->user, oldconfig->user)) {
1609       disorder_error(0, "'user' cannot be changed without a restart");
1610       failed = 1;
1611     }
1612     if(c->nice_speaker != oldconfig->nice_speaker) {
1613       disorder_error(0, "'nice_speaker' cannot be changed without a restart");
1614       /* ...but we accept the new config anyway */
1615     }
1616     if(c->nice_server != oldconfig->nice_server) {
1617       disorder_error(0, "'nice_server' cannot be changed without a restart");
1618       /* ...but we accept the new config anyway */
1619     }
1620     if(namepartlist_compare(&c->namepart, &oldconfig->namepart)) {
1621       disorder_error(0, "'namepart' settings cannot be changed without a restart");
1622       failed = 1;
1623     }
1624     if(stringlist_compare(&c->stopword, &oldconfig->stopword)) {
1625       disorder_error(0, "'stopword' settings cannot be changed without a restart");
1626       failed = 1;
1627     }
1628     if(failed) {
1629       disorder_error(0, "not installing incompatible new configuration");
1630       return -1;
1631     }
1632   }
1633   /* everything is good so we shall use the new config */
1634   config_free(config);
1635   /* warn about obsolete directives */
1636   config = c;
1637   return 0;
1638 }
1639
1640 /** @brief Return the path to the private configuration file */
1641 char *config_private(void) {
1642 #if _WIN32
1643   return NULL;
1644 #else
1645   char *s;
1646
1647   set_configfile();
1648   byte_xasprintf(&s, "%s.private", configfile);
1649   return s;
1650 #endif
1651 }
1652
1653 /** @brief Return the path to user's personal configuration file */
1654 char *config_userconf(const char *home, const struct passwd *pw) {
1655   char *s;
1656 #if _WIN32
1657   wchar_t *wpath = 0;
1658   char *appdata;
1659   if(SHGetKnownFolderPath(&FOLDERID_RoamingAppData, 0, NULL, &wpath) != S_OK)
1660     disorder_fatal(0, "error calling SHGetKnownFolderPath");
1661   appdata = win_wtomb(wpath);
1662   CoTaskMemFree(wpath);
1663   byte_xasprintf(&s, "%s\\DisOrder\\passwd", appdata);
1664 #else
1665   if(!home && !pw && !(pw = getpwuid(getuid())))
1666     disorder_fatal(0, "cannot determine our username");
1667   byte_xasprintf(&s, "%s/.disorder/passwd", home ? home : pw->pw_dir);
1668 #endif
1669   return s;
1670 }
1671
1672 #if !_WIN32
1673 /** @brief Return the path to user-specific system configuration */
1674 char *config_usersysconf(const struct passwd *pw) {
1675   char *s;
1676
1677   set_configfile();
1678   if(!strchr(pw->pw_name, '/')) {
1679     byte_xasprintf(&s, "%s.%s", configfile, pw->pw_name);
1680     return s;
1681   } else
1682     return 0;
1683 }
1684
1685 /** @brief Get a filename within the home directory
1686  * @param name Relative name
1687  * @return Full path
1688  */
1689 char *config_get_file(const char *name) {
1690   return config_get_file2(config, name);
1691 }
1692 #endif
1693
1694 /** @brief Order two stringlists
1695  * @param a First stringlist
1696  * @param b Second stringlist
1697  * @return <0, 0 or >0 if a<b, a=b or a>b
1698  */
1699 static int stringlist_compare(const struct stringlist *a,
1700                               const struct stringlist *b) {
1701   int n = 0, c;
1702
1703   while(n < a->n && n < b->n) {
1704     if((c = strcmp(a->s[n], b->s[n])))
1705       return c;
1706     ++n;
1707   }
1708   if(a->n < b->n)
1709     return -1;
1710   else if(a->n > b->n)
1711     return 1;
1712   else
1713     return 0;
1714 }
1715
1716 /** @brief Order two namepart definitions
1717  * @param a First namepart definition
1718  * @param b Second namepart definition
1719  * @return <0, 0 or >0 if a<b, a=b or a>b
1720  */
1721 static int namepart_compare(const struct namepart *a,
1722                             const struct namepart *b) {
1723   int c;
1724
1725   if((c = strcmp(a->part, b->part)))
1726     return c;
1727   if((c = strcmp(a->res, b->res)))
1728     return c;
1729   if((c = strcmp(a->replace, b->replace)))
1730     return c;
1731   if((c = strcmp(a->context, b->context)))
1732     return c;
1733   if(a->reflags > b->reflags)
1734     return 1;
1735   if(a->reflags < b->reflags)
1736     return -1;
1737   return 0;
1738 }
1739
1740 /** @brief Order two lists of namepart definitions
1741  * @param a First list of namepart definitions
1742  * @param b Second list of namepart definitions
1743  * @return <0, 0 or >0 if a<b, a=b or a>b
1744  */
1745 static int namepartlist_compare(const struct namepartlist *a,
1746                                 const struct namepartlist *b) {
1747   int n = 0, c;
1748
1749   while(n < a->n && n < b->n) {
1750     if((c = namepart_compare(&a->s[n], &b->s[n])))
1751       return c;
1752     ++n;
1753   }
1754   if(a->n > b->n)
1755     return 1;
1756   else if(a->n < b->n)
1757     return -1;
1758   else
1759     return 0;
1760 }
1761
1762 /** @brief Verify configuration table.
1763  * @return The number of problems found
1764 */
1765 int config_verify(void) {
1766   int fails = 0;
1767   size_t n;
1768   for(n = 1; n < sizeof conf / sizeof *conf; ++n)
1769     if(strcmp(conf[n-1].name, conf[n].name) >= 0) {
1770       fprintf(stderr, "%s >= %s\n", conf[n-1].name, conf[n].name);
1771       ++fails;
1772     }
1773   return fails;
1774 }
1775
1776 /*
1777 Local Variables:
1778 c-basic-offset:2
1779 comment-column:40
1780 fill-column:79
1781 End:
1782 */