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

   1 /*
   2  * This file is part of DisOrder.
   3  * Copyright (C) 2004-2009 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 #include <unistd.h>
  29 #include <ctype.h>
  30 #include <stddef.h>
  31 #include <pwd.h>
  32 #include <langinfo.h>
  33 #include <pcre.h>
  34 #include <signal.h>
  35
  36 #include "rights.h"
  37 #include "configuration.h"
  38 #include "mem.h"
  39 #include "log.h"
  40 #include "split.h"
  41 #include "syscalls.h"
  42 #include "table.h"
  43 #include "inputline.h"
  44 #include "charset.h"
  45 #include "defs.h"
  46 #include "printf.h"
  47 #include "regsub.h"
  48 #include "signame.h"
  49 #include "authhash.h"
  50 #include "vector.h"
  51 #include "uaudio.h"
  52
  53 /** @brief Path to config file
  54  *
  55  * set_configfile() sets the deafult if it is null.
  56  */
  57 char *configfile;
  58
  59 /** @brief Read user configuration
  60  *
  61  * If clear, the user-specific configuration is not read.
  62  */
  63 int config_per_user = 1;
  64
  65 /** @brief Table of audio APIs
  66  *
  67  * Only set in server processes.
  68  */
  69 const struct uaudio *const *config_uaudio_apis;
  70
  71 /** @brief Config file parser state */
  72 struct config_state {
  73   /** @brief Filename */
  74   const char *path;
  75
  76   /** @brief Line number */
  77   int line;
  78
  79   /** @brief Configuration object under construction */
  80   struct config *config;
  81 };
  82
  83 /** @brief Current configuration */
  84 struct config *config;
  85
  86 /** @brief One configuration item */
  87 struct conf {
  88   /** @brief Name as it appears in the config file */
  89   const char *name;
  90
  91   /** @brief Offset in @ref config structure */
  92   size_t offset;
  93
  94   /** @brief Pointer to item type */
  95   const struct conftype *type;
  96
  97   /** @brief Pointer to item-specific validation routine
  98    * @param cs Configuration state
  99    * @param nvec Length of (proposed) new value
 100    * @param vec Elements of new value
 101    * @return 0 on success, non-0 on error
 102    *
 103    * The validate function should report any error it detects.
 104    */
 105   int (*validate)(const struct config_state *cs,
 106                   int nvec, char **vec);
 107 };
 108
 109 /** @brief Type of a configuration item */
 110 struct conftype {
 111   /** @brief Pointer to function to set item
 112    * @param cs Configuration state
 113    * @param whoami Configuration item to set
 114    * @param nvec Length of new value
 115    * @param vec New value
 116    * @return 0 on success, non-0 on error
 117    */
 118   int (*set)(const struct config_state *cs,
 119              const struct conf *whoami,
 120              int nvec, char **vec);
 121
 122   /** @brief Pointer to function to free item
 123    * @param c Configuration structure to free an item of
 124    * @param whoami Configuration item to free
 125    */
 126   void (*free)(struct config *c, const struct conf *whoami);
 127 };
 128
 129 /** @brief Compute the address of an item */
 130 #define ADDRESS(C, TYPE) ((TYPE *)((char *)(C) + whoami->offset))
 131 /** @brief Return the value of an item */
 132 #define VALUE(C, TYPE) (*ADDRESS(C, TYPE))
 133
 134 static int stringlist_compare(const struct stringlist *a,
 135                               const struct stringlist *b);
 136 static int namepartlist_compare(const struct namepartlist *a,
 137                                 const struct namepartlist *b);
 138
 139 static int set_signal(const struct config_state *cs,
 140                       const struct conf *whoami,
 141                       int nvec, char **vec) {
 142   int n;
 143
 144   if(nvec != 1) {
 145     disorder_error(0, "%s:%d: '%s' requires one argument",
 146           cs->path, cs->line, whoami->name);
 147     return -1;
 148   }
 149   if((n = find_signal(vec[0])) == -1) {
 150     disorder_error(0, "%s:%d: unknown signal '%s'",
 151           cs->path, cs->line, vec[0]);
 152     return -1;
 153   }
 154   VALUE(cs->config, int) = n;
 155   return 0;
 156 }
 157
 158 static int set_collections(const struct config_state *cs,
 159                            const struct conf *whoami,
 160                            int nvec, char **vec) {
 161   struct collectionlist *cl;
 162   const char *root, *encoding, *module;
 163
 164   switch(nvec) {
 165   case 1:
 166     module = 0;
 167     encoding = 0;
 168     root = vec[0];
 169     break;
 170   case 2:
 171     module = vec[0];
 172     encoding = 0;
 173     root = vec[1];
 174     break;
 175   case 3:
 176     module = vec[0];
 177     encoding = vec[1];
 178     root = vec[2];
 179     break;
 180   case 0:
 181     disorder_error(0, "%s:%d: '%s' requires at least one argument",
 182                    cs->path, cs->line, whoami->name);
 183     return -1;
 184   default:
 185     disorder_error(0, "%s:%d: '%s' requires at most three arguments",
 186                    cs->path, cs->line, whoami->name);
 187     return -1;
 188   }
 189   /* Sanity check root */
 190   if(root[0] != '/') {
 191     disorder_error(0, "%s:%d: collection root must start with '/'",
 192                    cs->path, cs->line);
 193     return -1;
 194   }
 195   if(root[1] && root[strlen(root)-1] == '/') {
 196     disorder_error(0, "%s:%d: collection root must not end with '/'",
 197                    cs->path, cs->line);
 198     return -1;
 199   }
 200   /* Defaults */
 201   if(!module)
 202     module = "fs";
 203   if(!encoding)
 204     encoding = nl_langinfo(CODESET);
 205   cl = ADDRESS(cs->config, struct collectionlist);
 206   ++cl->n;
 207   cl->s = xrealloc(cl->s, cl->n * sizeof (struct collection));
 208   cl->s[cl->n - 1].module = xstrdup(module);
 209   cl->s[cl->n - 1].encoding = xstrdup(encoding);
 210   cl->s[cl->n - 1].root = xstrdup(root);
 211   return 0;
 212 }
 213
 214 static int set_boolean(const struct config_state *cs,
 215                        const struct conf *whoami,
 216                        int nvec, char **vec) {
 217   int state;
 218
 219   if(nvec != 1) {
 220     disorder_error(0, "%s:%d: '%s' takes only one argument",
 221                    cs->path, cs->line, whoami->name);
 222     return -1;
 223   }
 224   if(!strcmp(vec[0], "yes")) state = 1;
 225   else if(!strcmp(vec[0], "no")) state = 0;
 226   else {
 227     disorder_error(0, "%s:%d: argument to '%s' must be 'yes' or 'no'",
 228                    cs->path, cs->line, whoami->name);
 229     return -1;
 230   }
 231   VALUE(cs->config, int) = state;
 232   return 0;
 233 }
 234
 235 static int set_string(const struct config_state *cs,
 236                       const struct conf *whoami,
 237                       int nvec, char **vec) {
 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   xfree(VALUE(cs->config, char *));
 244   VALUE(cs->config, char *) = xstrdup(vec[0]);
 245   return 0;
 246 }
 247
 248 static int set_stringlist(const struct config_state *cs,
 249                           const struct conf *whoami,
 250                           int nvec, char **vec) {
 251   int n;
 252   struct stringlist *sl;
 253
 254   sl = ADDRESS(cs->config, struct stringlist);
 255   sl->n = 0;
 256   for(n = 0; n < nvec; ++n) {
 257     sl->n++;
 258     sl->s = xrealloc(sl->s, (sl->n * sizeof (char *)));
 259     sl->s[sl->n - 1] = xstrdup(vec[n]);
 260   }
 261   return 0;
 262 }
 263
 264 static int set_integer(const struct config_state *cs,
 265                        const struct conf *whoami,
 266                        int nvec, char **vec) {
 267   char *e;
 268
 269   if(nvec != 1) {
 270     disorder_error(0, "%s:%d: '%s' takes only one argument",
 271                    cs->path, cs->line, whoami->name);
 272     return -1;
 273   }
 274   if(xstrtol(ADDRESS(cs->config, long), vec[0], &e, 0)) {
 275     disorder_error(errno, "%s:%d: converting integer", cs->path, cs->line);
 276     return -1;
 277   }
 278   if(*e) {
 279     disorder_error(0, "%s:%d: invalid integer syntax", cs->path, cs->line);
 280     return -1;
 281   }
 282   return 0;
 283 }
 284
 285 static int set_stringlist_accum(const struct config_state *cs,
 286                                 const struct conf *whoami,
 287                                 int nvec, char **vec) {
 288   int n;
 289   struct stringlist *s;
 290   struct stringlistlist *sll;
 291
 292   sll = ADDRESS(cs->config, struct stringlistlist);
 293   if(nvec == 0) {
 294     sll->n = 0;
 295     return 0;
 296   }
 297   sll->n++;
 298   sll->s = xrealloc(sll->s, (sll->n * sizeof (struct stringlist)));
 299   s = &sll->s[sll->n - 1];
 300   s->n = nvec;
 301   s->s = xmalloc((nvec + 1) * sizeof (char *));
 302   for(n = 0; n < nvec; ++n)
 303     s->s[n] = xstrdup(vec[n]);
 304   return 0;
 305 }
 306
 307 static int set_string_accum(const struct config_state *cs,
 308                             const struct conf *whoami,
 309                             int nvec, char **vec) {
 310   int n;
 311   struct stringlist *sl;
 312
 313   sl = ADDRESS(cs->config, struct stringlist);
 314   if(nvec == 0) {
 315     sl->n = 0;
 316     return 0;
 317   }
 318   for(n = 0; n < nvec; ++n) {
 319     sl->n++;
 320     sl->s = xrealloc(sl->s, (sl->n * sizeof (char *)));
 321     sl->s[sl->n - 1] = xstrdup(vec[n]);
 322   }
 323   return 0;
 324 }
 325
 326 static int set_restrict(const struct config_state *cs,
 327                         const struct conf *whoami,
 328                         int nvec, char **vec) {
 329   unsigned r = 0;
 330   int n, i;
 331
 332   static const struct restriction {
 333     const char *name;
 334     unsigned bit;
 335   } restrictions[] = {
 336     { "remove", RESTRICT_REMOVE },
 337     { "scratch", RESTRICT_SCRATCH },
 338     { "move", RESTRICT_MOVE },
 339   };
 340
 341   for(n = 0; n < nvec; ++n) {
 342     if((i = TABLE_FIND(restrictions, name, vec[n])) < 0) {
 343       disorder_error(0, "%s:%d: invalid restriction '%s'",
 344                      cs->path, cs->line, vec[n]);
 345       return -1;
 346     }
 347     r |= restrictions[i].bit;
 348   }
 349   VALUE(cs->config, unsigned) = r;
 350   return 0;
 351 }
 352
 353 static int parse_sample_format(const struct config_state *cs,
 354                                struct stream_header *format,
 355                                int nvec, char **vec) {
 356   char *p = vec[0];
 357   long t;
 358
 359   if(nvec != 1) {
 360     disorder_error(0, "%s:%d: wrong number of arguments", cs->path, cs->line);
 361     return -1;
 362   }
 363   if(xstrtol(&t, p, &p, 0)) {
 364     disorder_error(errno, "%s:%d: converting bits-per-sample",
 365                    cs->path, cs->line);
 366     return -1;
 367   }
 368   if(t != 8 && t != 16) {
 369     disorder_error(0, "%s:%d: bad bits-per-sample (%ld)",
 370                    cs->path, cs->line, t);
 371     return -1;
 372   }
 373   if(format) format->bits = t;
 374   switch (*p) {
 375     case 'l': case 'L': t = ENDIAN_LITTLE; p++; break;
 376     case 'b': case 'B': t = ENDIAN_BIG; p++; break;
 377     default: t = ENDIAN_NATIVE; break;
 378   }
 379   if(format) format->endian = t;
 380   if(*p != '/') {
 381     disorder_error(errno, "%s:%d: expected `/' after bits-per-sample",
 382           cs->path, cs->line);
 383     return -1;
 384   }
 385   p++;
 386   if(xstrtol(&t, p, &p, 0)) {
 387     disorder_error(errno, "%s:%d: converting sample-rate", cs->path, cs->line);
 388     return -1;
 389   }
 390   if(t < 1 || t > INT_MAX) {
 391     disorder_error(0, "%s:%d: silly sample-rate (%ld)", cs->path, cs->line, t);
 392     return -1;
 393   }
 394   if(format) format->rate = t;
 395   if(*p != '/') {
 396     disorder_error(0, "%s:%d: expected `/' after sample-rate",
 397                    cs->path, cs->line);
 398     return -1;
 399   }
 400   p++;
 401   if(xstrtol(&t, p, &p, 0)) {
 402     disorder_error(errno, "%s:%d: converting channels", cs->path, cs->line);
 403     return -1;
 404   }
 405   if(t < 1 || t > 8) {
 406     disorder_error(0, "%s:%d: silly number (%ld) of channels",
 407                    cs->path, cs->line, t);
 408     return -1;
 409   }
 410   if(format) format->channels = t;
 411   if(*p) {
 412     disorder_error(0, "%s:%d: junk after channels", cs->path, cs->line);
 413     return -1;
 414   }
 415   return 0;
 416 }
 417
 418 static int set_sample_format(const struct config_state *cs,
 419                              const struct conf *whoami,
 420                              int nvec, char **vec) {
 421   return parse_sample_format(cs, ADDRESS(cs->config, struct stream_header),
 422                              nvec, vec);
 423 }
 424
 425 static int set_namepart(const struct config_state *cs,
 426                         const struct conf *whoami,
 427                         int nvec, char **vec) {
 428   struct namepartlist *npl = ADDRESS(cs->config, struct namepartlist);
 429   unsigned reflags;
 430   const char *errstr;
 431   int erroffset, n;
 432   pcre *re;
 433
 434   if(nvec < 3) {
 435     disorder_error(0, "%s:%d: namepart needs at least 3 arguments",
 436                    cs->path, cs->line);
 437     return -1;
 438   }
 439   if(nvec > 5) {
 440     disorder_error(0, "%s:%d: namepart needs at most 5 arguments",
 441                    cs->path, cs->line);
 442     return -1;
 443   }
 444   reflags = nvec >= 5 ? regsub_flags(vec[4]) : 0;
 445   if(!(re = pcre_compile(vec[1],
 446                          PCRE_UTF8
 447                          |regsub_compile_options(reflags),
 448                          &errstr, &erroffset, 0))) {
 449     disorder_error(0, "%s:%d: compiling regexp /%s/: %s (offset %d)",
 450                    cs->path, cs->line, vec[1], errstr, erroffset);
 451     return -1;
 452   }
 453   npl->s = xrealloc(npl->s, (npl->n + 1) * sizeof (struct namepart));
 454   npl->s[npl->n].part = xstrdup(vec[0]);
 455   npl->s[npl->n].re = re;
 456   npl->s[npl->n].res = xstrdup(vec[1]);
 457   npl->s[npl->n].replace = xstrdup(vec[2]);
 458   npl->s[npl->n].context = xstrdup(vec[3]);
 459   npl->s[npl->n].reflags = reflags;
 460   ++npl->n;
 461   /* XXX a bit of a bodge; relies on there being very few parts. */
 462   for(n = 0; (n < cs->config->nparts
 463               && strcmp(cs->config->parts[n], vec[0])); ++n)
 464     ;
 465   if(n >= cs->config->nparts) {
 466     cs->config->parts = xrealloc(cs->config->parts,
 467                                  (cs->config->nparts + 1) * sizeof (char *));
 468     cs->config->parts[cs->config->nparts++] = xstrdup(vec[0]);
 469   }
 470   return 0;
 471 }
 472
 473 static int set_transform(const struct config_state *cs,
 474                          const struct conf *whoami,
 475                          int nvec, char **vec) {
 476   struct transformlist *tl = ADDRESS(cs->config, struct transformlist);
 477   pcre *re;
 478   unsigned reflags;
 479   const char *errstr;
 480   int erroffset;
 481
 482   if(nvec < 3) {
 483     disorder_error(0, "%s:%d: transform needs at least 3 arguments",
 484                    cs->path, cs->line);
 485     return -1;
 486   }
 487   if(nvec > 5) {
 488     disorder_error(0, "%s:%d: transform needs at most 5 arguments",
 489                    cs->path, cs->line);
 490     return -1;
 491   }
 492   reflags = (nvec >= 5 ? regsub_flags(vec[4]) : 0);
 493   if(!(re = pcre_compile(vec[1],
 494                          PCRE_UTF8
 495                          |regsub_compile_options(reflags),
 496                          &errstr, &erroffset, 0))) {
 497     disorder_error(0, "%s:%d: compiling regexp /%s/: %s (offset %d)",
 498                    cs->path, cs->line, vec[1], errstr, erroffset);
 499     return -1;
 500   }
 501   tl->t = xrealloc(tl->t, (tl->n + 1) * sizeof (struct namepart));
 502   tl->t[tl->n].type = xstrdup(vec[0]);
 503   tl->t[tl->n].context = xstrdup(vec[3] ? vec[3] : "*");
 504   tl->t[tl->n].re = re;
 505   tl->t[tl->n].replace = xstrdup(vec[2]);
 506   tl->t[tl->n].flags = reflags;
 507   ++tl->n;
 508   return 0;
 509 }
 510
 511 static int set_rights(const struct config_state *cs,
 512                       const struct conf *whoami,
 513                       int nvec, char **vec) {
 514   if(nvec != 1) {
 515     disorder_error(0, "%s:%d: '%s' requires one argument",
 516                    cs->path, cs->line, whoami->name);
 517     return -1;
 518   }
 519   if(parse_rights(vec[0], 0, 1)) {
 520     disorder_error(0, "%s:%d: invalid rights string '%s'",
 521                    cs->path, cs->line, vec[0]);
 522     return -1;
 523   }
 524   return set_string(cs, whoami, nvec, vec);
 525 }
 526
 527 static int set_netaddress(const struct config_state *cs,
 528                           const struct conf *whoami,
 529                           int nvec, char **vec) {
 530   struct netaddress *na = ADDRESS(cs->config, struct netaddress);
 531
 532   if(netaddress_parse(na, nvec, vec)) {
 533     disorder_error(0, "%s:%d: invalid network address", cs->path, cs->line);
 534     return -1;
 535   }
 536   return 0;
 537 }
 538
 539 /* free functions */
 540
 541 static void free_none(struct config attribute((unused)) *c,
 542                       const struct conf attribute((unused)) *whoami) {
 543 }
 544
 545 static void free_string(struct config *c,
 546                         const struct conf *whoami) {
 547   xfree(VALUE(c, char *));
 548   VALUE(c, char *) = 0;
 549 }
 550
 551 static void free_stringlist(struct config *c,
 552                             const struct conf *whoami) {
 553   int n;
 554   struct stringlist *sl = ADDRESS(c, struct stringlist);
 555
 556   for(n = 0; n < sl->n; ++n)
 557     xfree(sl->s[n]);
 558   xfree(sl->s);
 559 }
 560
 561 static void free_stringlistlist(struct config *c,
 562                                 const struct conf *whoami) {
 563   int n, m;
 564   struct stringlistlist *sll = ADDRESS(c, struct stringlistlist);
 565   struct stringlist *sl;
 566
 567   for(n = 0; n < sll->n; ++n) {
 568     sl = &sll->s[n];
 569     for(m = 0; m < sl->n; ++m)
 570       xfree(sl->s[m]);
 571     xfree(sl->s);
 572   }
 573   xfree(sll->s);
 574 }
 575
 576 static void free_collectionlist(struct config *c,
 577                                 const struct conf *whoami) {
 578   struct collectionlist *cll = ADDRESS(c, struct collectionlist);
 579   struct collection *cl;
 580   int n;
 581
 582   for(n = 0; n < cll->n; ++n) {
 583     cl = &cll->s[n];
 584     xfree(cl->module);
 585     xfree(cl->encoding);
 586     xfree(cl->root);
 587   }
 588   xfree(cll->s);
 589 }
 590
 591 static void free_namepartlist(struct config *c,
 592                               const struct conf *whoami) {
 593   struct namepartlist *npl = ADDRESS(c, struct namepartlist);
 594   struct namepart *np;
 595   int n;
 596
 597   for(n = 0; n < npl->n; ++n) {
 598     np = &npl->s[n];
 599     xfree(np->part);
 600     pcre_free(np->re);                  /* ...whatever pcre_free is set to. */
 601     xfree(np->res);
 602     xfree(np->replace);
 603     xfree(np->context);
 604   }
 605   xfree(npl->s);
 606 }
 607
 608 static void free_transformlist(struct config *c,
 609                                const struct conf *whoami) {
 610   struct transformlist *tl = ADDRESS(c, struct transformlist);
 611   struct transform *t;
 612   int n;
 613
 614   for(n = 0; n < tl->n; ++n) {
 615     t = &tl->t[n];
 616     xfree(t->type);
 617     pcre_free(t->re);                   /* ...whatever pcre_free is set to. */
 618     xfree(t->replace);
 619     xfree(t->context);
 620   }
 621   xfree(tl->t);
 622 }
 623
 624 static void free_netaddress(struct config *c,
 625                             const struct conf *whoami) {
 626   struct netaddress *na = ADDRESS(c, struct netaddress);
 627
 628   xfree(na->address);
 629 }
 630
 631 /* configuration types */
 632
 633 static const struct conftype
 634   type_signal = { set_signal, free_none },
 635   type_collections = { set_collections, free_collectionlist },
 636   type_boolean = { set_boolean, free_none },
 637   type_string = { set_string, free_string },
 638   type_stringlist = { set_stringlist, free_stringlist },
 639   type_integer = { set_integer, free_none },
 640   type_stringlist_accum = { set_stringlist_accum, free_stringlistlist },
 641   type_string_accum = { set_string_accum, free_stringlist },
 642   type_sample_format = { set_sample_format, free_none },
 643   type_restrict = { set_restrict, free_none },
 644   type_namepart = { set_namepart, free_namepartlist },
 645   type_transform = { set_transform, free_transformlist },
 646   type_netaddress = { set_netaddress, free_netaddress },
 647   type_rights = { set_rights, free_string };
 648
 649 /* specific validation routine */
 650
 651 /** @brief Perform a test on a filename
 652  * @param test Test function to call on mode bits
 653  * @param what Type of file sought
 654  *
 655  * If @p test returns 0 then the file is not a @p what and an error
 656  * is reported and -1 is returned.
 657  */
 658 #define VALIDATE_FILE(test, what) do {                  \
 659   struct stat sb;                                       \
 660   int n;                                                \
 661                                                         \
 662   for(n = 0; n < nvec; ++n) {                           \
 663     if(stat(vec[n], &sb) < 0) {                         \
 664       disorder_error(errno, "%s:%d: %s",                \
 665                      cs->path, cs->line, vec[n]);       \
 666       return -1;                                        \
 667     }                                                   \
 668     if(!test(sb.st_mode)) {                             \
 669       disorder_error(0, "%s:%d: %s is not a %s",        \
 670                      cs->path, cs->line, vec[n], what); \
 671       return -1;                                        \
 672     }                                                   \
 673   }                                                     \
 674 } while(0)
 675
 676 /** @brief Validate an absolute path
 677  * @param cs Configuration state
 678  * @param nvec Length of (proposed) new value
 679  * @param vec Elements of new value
 680  * @return 0 on success, non-0 on error
 681  */
 682 static int validate_isabspath(const struct config_state *cs,
 683                               int nvec, char **vec) {
 684   int n;
 685
 686   for(n = 0; n < nvec; ++n)
 687     if(vec[n][0] != '/') {
 688       disorder_error(errno, "%s:%d: %s: not an absolute path",
 689                      cs->path, cs->line, vec[n]);
 690       return -1;
 691     }
 692   return 0;
 693 }
 694
 695 /** @brief Validate an existing directory
 696  * @param cs Configuration state
 697  * @param nvec Length of (proposed) new value
 698  * @param vec Elements of new value
 699  * @return 0 on success, non-0 on error
 700  */
 701 static int validate_isdir(const struct config_state *cs,
 702                           int nvec, char **vec) {
 703   VALIDATE_FILE(S_ISDIR, "directory");
 704   return 0;
 705 }
 706
 707 /** @brief Validate an existing regular file
 708  * @param cs Configuration state
 709  * @param nvec Length of (proposed) new value
 710  * @param vec Elements of new value
 711  * @return 0 on success, non-0 on error
 712  */
 713 static int validate_isreg(const struct config_state *cs,
 714                           int nvec, char **vec) {
 715   VALIDATE_FILE(S_ISREG, "regular file");
 716   return 0;
 717 }
 718
 719 /** @brief Validate a player pattern
 720  * @param cs Configuration state
 721  * @param nvec Length of (proposed) new value
 722  * @param vec Elements of new value
 723  * @return 0 on success, non-0 on error
 724  */
 725 static int validate_player(const struct config_state *cs,
 726                            int nvec,
 727                            char attribute((unused)) **vec) {
 728   if(nvec < 2) {
 729     disorder_error(0, "%s:%d: should be at least 'player PATTERN MODULE'",
 730                    cs->path, cs->line);
 731     return -1;
 732   }
 733   return 0;
 734 }
 735
 736 /** @brief Validate a track length pattern
 737  * @param cs Configuration state
 738  * @param nvec Length of (proposed) new value
 739  * @param vec Elements of new value
 740  * @return 0 on success, non-0 on error
 741  */
 742 static int validate_tracklength(const struct config_state *cs,
 743                                 int nvec,
 744                                 char attribute((unused)) **vec) {
 745   if(nvec < 2) {
 746     disorder_error(0, "%s:%d: should be at least 'tracklength PATTERN MODULE'",
 747                    cs->path, cs->line);
 748     return -1;
 749   }
 750   return 0;
 751 }
 752
 753 /** @brief Validate an allow directive
 754  * @param cs Configuration state
 755  * @param nvec Length of (proposed) new value
 756  * @param vec Elements of new value
 757  * @return 0 on success, non-0 on error
 758  *
 759  * Obsolete - only used for parsing legacy configuration.
 760  */
 761 static int validate_allow(const struct config_state *cs,
 762                           int nvec,
 763                           char attribute((unused)) **vec) {
 764   if(nvec != 2) {
 765     disorder_error(0, "%s:%d: must be 'allow NAME PASS'", cs->path, cs->line);
 766     return -1;
 767   }
 768   return 0;
 769 }
 770
 771 /** @brief Validate a non-negative (@c long) integer
 772  * @param cs Configuration state
 773  * @param nvec Length of (proposed) new value
 774  * @param vec Elements of new value
 775  * @return 0 on success, non-0 on error
 776  */
 777 static int validate_non_negative(const struct config_state *cs,
 778                                  int nvec, char **vec) {
 779   long n;
 780
 781   if(nvec < 1) {
 782     disorder_error(0, "%s:%d: missing argument", cs->path, cs->line);
 783     return -1;
 784   }
 785   if(nvec > 1) {
 786     disorder_error(0, "%s:%d: too many arguments", cs->path, cs->line);
 787     return -1;
 788   }
 789   if(xstrtol(&n, vec[0], 0, 0)) {
 790     disorder_error(0, "%s:%d: %s", cs->path, cs->line, strerror(errno));
 791     return -1;
 792   }
 793   if(n < 0) {
 794     disorder_error(0, "%s:%d: must not be negative", cs->path, cs->line);
 795     return -1;
 796   }
 797   return 0;
 798 }
 799
 800 /** @brief Validate a positive (@c long) integer
 801  * @param cs Configuration state
 802  * @param nvec Length of (proposed) new value
 803  * @param vec Elements of new value
 804  * @return 0 on success, non-0 on error
 805  */
 806 static int validate_positive(const struct config_state *cs,
 807                           int nvec, char **vec) {
 808   long n;
 809
 810   if(nvec < 1) {
 811     disorder_error(0, "%s:%d: missing argument", cs->path, cs->line);
 812     return -1;
 813   }
 814   if(nvec > 1) {
 815     disorder_error(0, "%s:%d: too many arguments", cs->path, cs->line);
 816     return -1;
 817   }
 818   if(xstrtol(&n, vec[0], 0, 0)) {
 819     disorder_error(0, "%s:%d: %s", cs->path, cs->line, strerror(errno));
 820     return -1;
 821   }
 822   if(n <= 0) {
 823     disorder_error(0, "%s:%d: must be positive", cs->path, cs->line);
 824     return -1;
 825   }
 826   return 0;
 827 }
 828
 829 /** @brief Validate a system username
 830  * @param cs Configuration state
 831  * @param nvec Length of (proposed) new value
 832  * @param vec Elements of new value
 833  * @return 0 on success, non-0 on error
 834  */
 835 static int validate_isauser(const struct config_state *cs,
 836                             int attribute((unused)) nvec,
 837                             char **vec) {
 838   struct passwd *pw;
 839
 840   if(!(pw = getpwnam(vec[0]))) {
 841     disorder_error(0, "%s:%d: no such user as '%s'", cs->path, cs->line, vec[0]);
 842     return -1;
 843   }
 844   return 0;
 845 }
 846
 847 /** @brief Validate a sample format string
 848  * @param cs Configuration state
 849  * @param nvec Length of (proposed) new value
 850  * @param vec Elements of new value
 851  * @return 0 on success, non-0 on error
 852  */
 853 static int validate_sample_format(const struct config_state *cs,
 854                                   int attribute((unused)) nvec,
 855                                   char **vec) {
 856   return parse_sample_format(cs, 0, nvec, vec);
 857 }
 858
 859 /** @brief Validate anything
 860  * @param cs Configuration state
 861  * @param nvec Length of (proposed) new value
 862  * @param vec Elements of new value
 863  * @return 0
 864  */
 865 static int validate_any(const struct config_state attribute((unused)) *cs,
 866                         int attribute((unused)) nvec,
 867                         char attribute((unused)) **vec) {
 868   return 0;
 869 }
 870
 871 /** @brief Validate a URL
 872  * @param cs Configuration state
 873  * @param nvec Length of (proposed) new value
 874  * @param vec Elements of new value
 875  * @return 0 on success, non-0 on error
 876  *
 877  * Rather cursory.
 878  */
 879 static int validate_url(const struct config_state attribute((unused)) *cs,
 880                         int attribute((unused)) nvec,
 881                         char **vec) {
 882   const char *s;
 883   int n;
 884   /* absoluteURI   = scheme ":" ( hier_part | opaque_part )
 885      scheme        = alpha *( alpha | digit | "+" | "-" | "." ) */
 886   s = vec[0];
 887   n = strspn(s, ("abcdefghijklmnopqrstuvwxyz"
 888                  "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
 889                  "0123456789"));
 890   if(s[n] != ':') {
 891     disorder_error(0, "%s:%d: invalid url '%s'", cs->path, cs->line, vec[0]);
 892     return -1;
 893   }
 894   if(!strncmp(s, "http:", 5)
 895      || !strncmp(s, "https:", 6)) {
 896     s += n + 1;
 897     /* we only do a rather cursory check */
 898     if(strncmp(s, "//", 2)) {
 899       disorder_error(0, "%s:%d: invalid url '%s'", cs->path, cs->line, vec[0]);
 900       return -1;
 901     }
 902   }
 903   return 0;
 904 }
 905
 906 /** @brief Validate an alias pattern
 907  * @param cs Configuration state
 908  * @param nvec Length of (proposed) new value
 909  * @param vec Elements of new value
 910  * @return 0 on success, non-0 on error
 911  */
 912 static int validate_alias(const struct config_state *cs,
 913                           int nvec,
 914                           char **vec) {
 915   const char *s;
 916   int in_brackets = 0, c;
 917
 918   if(nvec < 1) {
 919     disorder_error(0, "%s:%d: missing argument", cs->path, cs->line);
 920     return -1;
 921   }
 922   if(nvec > 1) {
 923     disorder_error(0, "%s:%d: too many arguments", cs->path, cs->line);
 924     return -1;
 925   }
 926   s = vec[0];
 927   while((c = (unsigned char)*s++)) {
 928     if(in_brackets) {
 929       if(c == '}')
 930         in_brackets = 0;
 931       else if(!isalnum(c)) {
 932         disorder_error(0, "%s:%d: invalid part name in alias expansion in '%s'",
 933                        cs->path, cs->line, vec[0]);
 934           return -1;
 935       }
 936     } else {
 937       if(c == '{') {
 938         in_brackets = 1;
 939         if(*s == '/')
 940           ++s;
 941       } else if(c == '\\') {
 942         if(!(c = (unsigned char)*s++)) {
 943           disorder_error(0, "%s:%d: unterminated escape in alias expansion in '%s'",
 944                          cs->path, cs->line, vec[0]);
 945           return -1;
 946         } else if(c != '\\' && c != '{') {
 947           disorder_error(0, "%s:%d: invalid escape in alias expansion in '%s'",
 948                          cs->path, cs->line, vec[0]);
 949           return -1;
 950         }
 951       }
 952     }
 953     ++s;
 954   }
 955   if(in_brackets) {
 956     disorder_error(0,
 957                    "%s:%d: unterminated part name in alias expansion in '%s'",
 958                    cs->path, cs->line, vec[0]);
 959     return -1;
 960   }
 961   return 0;
 962 }
 963
 964 /** @brief Validate a hash algorithm name
 965  * @param cs Configuration state
 966  * @param nvec Length of (proposed) new value
 967  * @param vec Elements of new value
 968  * @return 0 on success, non-0 on error
 969  */
 970 static int validate_algo(const struct config_state attribute((unused)) *cs,
 971                          int nvec,
 972                          char **vec) {
 973   if(nvec != 1) {
 974     disorder_error(0, "%s:%d: invalid algorithm specification", cs->path, cs->line);
 975     return -1;
 976   }
 977   if(!valid_authhash(vec[0])) {
 978     disorder_error(0, "%s:%d: unsuported algorithm '%s'", cs->path, cs->line, vec[0]);
 979     return -1;
 980   }
 981   return 0;
 982 }
 983
 984 /** @brief Validate a playback backend name
 985  * @param cs Configuration state
 986  * @param nvec Length of (proposed) new value
 987  * @param vec Elements of new value
 988  * @return 0 on success, non-0 on error
 989  */
 990 static int validate_backend(const struct config_state attribute((unused)) *cs,
 991                             int nvec,
 992                             char **vec) {
 993   int n;
 994   if(nvec != 1) {
 995     disorder_error(0, "%s:%d: invalid sound API specification", cs->path, cs->line);
 996     return -1;
 997   }
 998   if(!strcmp(vec[0], "network")) {
 999     disorder_error(0, "'api network' is deprecated; use 'api rtp'");
1000     return 0;
1001   }
1002   if(config_uaudio_apis) {
1003     for(n = 0; config_uaudio_apis[n]; ++n)
1004       if(!strcmp(vec[0], config_uaudio_apis[n]->name))
1005         return 0;
1006     disorder_error(0, "%s:%d: unrecognized sound API '%s'", cs->path, cs->line, vec[0]);
1007     return -1;
1008   }
1009   /* In non-server processes we have no idea what's valid */
1010   return 0;
1011 }
1012
1013 /** @brief Validate a pause mode string
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 static int validate_pausemode(const struct config_state attribute((unused)) *cs,
1020                               int nvec,
1021                               char **vec) {
1022   if(nvec == 1 && (!strcmp(vec[0], "silence") || !strcmp(vec[0], "suspend")))
1023     return 0;
1024   disorder_error(0, "%s:%d: invalid pause mode", cs->path, cs->line);
1025   return -1;
1026 }
1027
1028 /** @brief Validate a destination network address
1029  * @param cs Configuration state
1030  * @param nvec Length of (proposed) new value
1031  * @param vec Elements of new value
1032  * @return 0 on success, non-0 on error
1033  *
1034  * By a destination address, it is meant that it must not be a wildcard
1035  * address.
1036  */
1037 static int validate_destaddr(const struct config_state attribute((unused)) *cs,
1038                              int nvec,
1039                              char **vec) {
1040   struct netaddress na[1];
1041
1042   if(netaddress_parse(na, nvec, vec)) {
1043     disorder_error(0, "%s:%d: invalid network address", cs->path, cs->line);
1044     return -1;
1045   }
1046   if(!na->address) {
1047     disorder_error(0, "%s:%d: destination address required", cs->path, cs->line);
1048     return -1;
1049   }
1050   xfree(na->address);
1051   return 0;
1052 }
1053
1054 /** @brief Item name and and offset */
1055 #define C(x) #x, offsetof(struct config, x)
1056 /** @brief Item name and and offset */
1057 #define C2(x,y) #x, offsetof(struct config, y)
1058
1059 /** @brief All configuration items */
1060 static const struct conf conf[] = {
1061   { C(alias),            &type_string,           validate_alias },
1062   { C(allow),            &type_stringlist_accum, validate_allow },
1063   { C(api),              &type_string,           validate_backend },
1064   { C(authorization_algorithm), &type_string,    validate_algo },
1065   { C(broadcast),        &type_netaddress,       validate_destaddr },
1066   { C(broadcast_from),   &type_netaddress,       validate_any },
1067   { C(channel),          &type_string,           validate_any },
1068   { C(checkpoint_kbyte), &type_integer,          validate_non_negative },
1069   { C(checkpoint_min),   &type_integer,          validate_non_negative },
1070   { C(collection),       &type_collections,      validate_any },
1071   { C(connect),          &type_netaddress,       validate_destaddr },
1072   { C(cookie_login_lifetime),  &type_integer,    validate_positive },
1073   { C(cookie_key_lifetime),  &type_integer,      validate_positive },
1074   { C(dbversion),        &type_integer,          validate_positive },
1075   { C(default_rights),   &type_rights,           validate_any },
1076   { C(device),           &type_string,           validate_any },
1077   { C(gap),              &type_integer,          validate_non_negative },
1078   { C(history),          &type_integer,          validate_positive },
1079   { C(home),             &type_string,           validate_isabspath },
1080   { C(listen),           &type_netaddress,       validate_any },
1081   { C(lock),             &type_boolean,          validate_any },
1082   { C(mail_sender),      &type_string,           validate_any },
1083   { C(mixer),            &type_string,           validate_any },
1084   { C(multicast_loop),   &type_boolean,          validate_any },
1085   { C(multicast_ttl),    &type_integer,          validate_non_negative },
1086   { C(namepart),         &type_namepart,         validate_any },
1087   { C(new_bias),         &type_integer,          validate_positive },
1088   { C(new_bias_age),     &type_integer,          validate_positive },
1089   { C(new_max),          &type_integer,          validate_positive },
1090   { C2(nice, nice_rescan), &type_integer,        validate_non_negative },
1091   { C(nice_rescan),      &type_integer,          validate_non_negative },
1092   { C(nice_server),      &type_integer,          validate_any },
1093   { C(nice_speaker),     &type_integer,          validate_any },
1094   { C(noticed_history),  &type_integer,          validate_positive },
1095   { C(password),         &type_string,           validate_any },
1096   { C(pause_mode),       &type_string,           validate_pausemode },
1097   { C(player),           &type_stringlist_accum, validate_player },
1098   { C(playlist_lock_timeout), &type_integer,     validate_positive },
1099   { C(playlist_max) ,    &type_integer,          validate_positive },
1100   { C(plugins),          &type_string_accum,     validate_isdir },
1101   { C(prefsync),         &type_integer,          validate_positive },
1102   { C(queue_pad),        &type_integer,          validate_positive },
1103   { C(replay_min),       &type_integer,          validate_non_negative },
1104   { C(refresh),          &type_integer,          validate_positive },
1105   { C(reminder_interval), &type_integer,         validate_positive },
1106   { C(remote_userman),   &type_boolean,          validate_any },
1107   { C2(restrict, restrictions),         &type_restrict,         validate_any },
1108   { C(rtp_delay_threshold), &type_integer,       validate_positive },
1109   { C(sample_format),    &type_sample_format,    validate_sample_format },
1110   { C(scratch),          &type_string_accum,     validate_isreg },
1111   { C(sendmail),         &type_string,           validate_isabspath },
1112   { C(short_display),    &type_integer,          validate_positive },
1113   { C(signal),           &type_signal,           validate_any },
1114   { C(smtp_server),      &type_string,           validate_any },
1115   { C(sox_generation),   &type_integer,          validate_non_negative },
1116   { C2(speaker_backend, api),  &type_string,     validate_backend },
1117   { C(speaker_command),  &type_string,           validate_any },
1118   { C(stopword),         &type_string_accum,     validate_any },
1119   { C(templates),        &type_string_accum,     validate_isdir },
1120   { C(tracklength),      &type_stringlist_accum, validate_tracklength },
1121   { C(transform),        &type_transform,        validate_any },
1122   { C(trust),            &type_string_accum,     validate_any },
1123   { C(url),              &type_string,           validate_url },
1124   { C(user),             &type_string,           validate_isauser },
1125   { C(username),         &type_string,           validate_any },
1126 };
1127
1128 /** @brief Find a configuration item's definition by key */
1129 static const struct conf *find(const char *key) {
1130   int n;
1131
1132   if((n = TABLE_FIND(conf, name, key)) < 0)
1133     return 0;
1134   return &conf[n];
1135 }
1136
1137 /** @brief Set a new configuration value
1138  * @param cs Configuration state
1139  * @param nvec Length of @p vec
1140  * @param vec Name and new value
1141  * @return 0 on success, non-0 on error.
1142  *
1143  * @c vec[0] is the name, the rest is the value.
1144  */
1145 static int config_set(const struct config_state *cs,
1146                       int nvec, char **vec) {
1147   const struct conf *which;
1148
1149   D(("config_set %s", vec[0]));
1150   if(!(which = find(vec[0]))) {
1151     disorder_error(0, "%s:%d: unknown configuration key '%s'",
1152           cs->path, cs->line, vec[0]);
1153     return -1;
1154   }
1155   return (which->validate(cs, nvec - 1, vec + 1)
1156           || which->type->set(cs, which, nvec - 1, vec + 1));
1157 }
1158
1159 /** @brief Set a configuration item from parameters
1160  * @param cs Configuration state
1161  * @param which Item to set
1162  * @param ... Value as strings, terminated by (char *)NULL
1163  * @return 0 on success, non-0 on error
1164  */
1165 static int config_set_args(const struct config_state *cs,
1166                            const char *which, ...) {
1167   va_list ap;
1168   struct vector v[1];
1169   char *s;
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   int 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   const char *logname;
1327   struct passwd *pw;
1328   struct config_state cs;
1329   size_t n;
1330
1331   cs.path = "<internal>";
1332   cs.line = 0;
1333   cs.config = c;
1334   /* Strings had better be xstrdup'd as they will get freed at some point. */
1335   c->gap = 0;
1336   c->history = 60;
1337   c->home = xstrdup(pkgstatedir);
1338   if(!(pw = getpwuid(getuid())))
1339     disorder_fatal(0, "cannot determine our username");
1340   logname = pw->pw_name;
1341   c->username = xstrdup(logname);
1342   c->refresh = 15;
1343   c->prefsync = 0;
1344   c->signal = SIGKILL;
1345   c->alias = xstrdup("{/artist}{/album}{/title}{ext}");
1346   c->lock = 1;
1347   c->device = xstrdup("default");
1348   c->nice_rescan = 10;
1349   c->speaker_command = 0;
1350   c->sample_format.bits = 16;
1351   c->sample_format.rate = 44100;
1352   c->sample_format.channels = 2;
1353   c->sample_format.endian = ENDIAN_NATIVE;
1354   c->queue_pad = 10;
1355   c->replay_min = 8 * 3600;
1356   c->api = NULL;
1357   c->multicast_ttl = 1;
1358   c->multicast_loop = 1;
1359   c->authorization_algorithm = xstrdup("sha1");
1360   c->noticed_history = 31;
1361   c->short_display = 32;
1362   c->mixer = 0;
1363   c->channel = 0;
1364   c->dbversion = 2;
1365   c->cookie_login_lifetime = 86400;
1366   c->cookie_key_lifetime = 86400 * 7;
1367   if(sendmail_binary[0] && strcmp(sendmail_binary, "none"))
1368     c->sendmail = xstrdup(sendmail_binary);
1369   c->smtp_server = xstrdup("127.0.0.1");
1370   c->new_max = 100;
1371   c->reminder_interval = 600;           /* 10m */
1372   c->new_bias_age = 7 * 86400;          /* 1 week */
1373   c->new_bias = 4500000;                /* 50 times the base weight */
1374   c->sox_generation = DEFAULT_SOX_GENERATION;
1375   c->playlist_max = INT_MAX;            /* effectively no limit */
1376   c->playlist_lock_timeout = 10;        /* 10s */
1377   /* Default stopwords */
1378   if(config_set(&cs, (int)NDEFAULT_STOPWORDS, (char **)default_stopwords))
1379     exit(1);
1380   /* Default player configuration */
1381   for(n = 0; n < NDEFAULT_PLAYERS; ++n) {
1382     if(config_set_args(&cs, "player",
1383                        default_players[n], "execraw", "disorder-decode", (char *)0))
1384       exit(1);
1385     if(config_set_args(&cs, "tracklength",
1386                        default_players[n], "disorder-tracklength", (char *)0))
1387       exit(1);
1388   }
1389   c->broadcast.af = -1;
1390   c->broadcast_from.af = -1;
1391   c->listen.af = -1;
1392   c->connect.af = -1;
1393   return c;
1394 }
1395
1396 /** @brief Construct a filename
1397  * @param c Configuration
1398  * @param name Base filename
1399  * @return Full filename
1400  *
1401  * Usually use config_get_file() instead.
1402  */
1403 char *config_get_file2(struct config *c, const char *name) {
1404   char *s;
1405
1406   byte_xasprintf(&s, "%s/%s", c->home, name);
1407   return s;
1408 }
1409
1410 /** @brief Set the default configuration file */
1411 static void set_configfile(void) {
1412   if(!configfile)
1413     byte_xasprintf(&configfile, "%s/config", pkgconfdir);
1414 }
1415
1416 /** @brief Free a configuration object
1417  * @param c Configuration to free
1418  *
1419  * @p c is indeterminate after this function is called.
1420  */
1421 void config_free(struct config *c) {
1422   int n;
1423
1424   if(c) {
1425     for(n = 0; n < (int)(sizeof conf / sizeof *conf); ++n)
1426       conf[n].type->free(c, &conf[n]);
1427     for(n = 0; n < c->nparts; ++n)
1428       xfree(c->parts[n]);
1429     xfree(c->parts);
1430     xfree(c);
1431   }
1432 }
1433
1434 /** @brief Set post-parse defaults
1435  * @param c Configuration to update
1436  * @param server True when running in the server
1437  *
1438  * If @p server is set then certain parts of the configuration are more
1439  * strictly validated.
1440  */
1441 static void config_postdefaults(struct config *c,
1442                                 int server) {
1443   struct config_state cs;
1444   const struct conf *whoami;
1445   int n;
1446
1447   static const char *namepart[][4] = {
1448     { "title",  "/([0-9]+ *[-:]? *)?([^/]+)\\.[a-zA-Z0-9]+$", "$2", "display" },
1449     { "title",  "/([^/]+)\\.[a-zA-Z0-9]+$",           "$1", "sort" },
1450     { "album",  "/([^/]+)/[^/]+$",                    "$1", "*" },
1451     { "artist", "/([^/]+)/[^/]+/[^/]+$",              "$1", "*" },
1452     { "ext",    "(\\.[a-zA-Z0-9]+)$",                 "$1", "*" },
1453   };
1454 #define NNAMEPART (int)(sizeof namepart / sizeof *namepart)
1455
1456   static const char *transform[][5] = {
1457     { "track", "^.*/([0-9]+ *[-:]? *)?([^/]+)\\.[a-zA-Z0-9]+$", "$2", "display", "" },
1458     { "track", "^.*/([^/]+)\\.[a-zA-Z0-9]+$",           "$1", "sort", "" },
1459     { "dir",   "^.*/([^/]+)$",                          "$1", "*", "" },
1460     { "dir",   "^(the) ([^/]*)",                        "$2, $1", "sort", "i", },
1461     { "dir",   "[[:punct:]]",                           "", "sort", "g", }
1462   };
1463 #define NTRANSFORM (int)(sizeof transform / sizeof *transform)
1464
1465   cs.path = "<internal>";
1466   cs.line = 0;
1467   cs.config = c;
1468   if(!c->namepart.n) {
1469     whoami = find("namepart");
1470     for(n = 0; n < NNAMEPART; ++n)
1471       set_namepart(&cs, whoami, 4, (char **)namepart[n]);
1472   }
1473   if(!c->transform.n) {
1474     whoami = find("transform");
1475     for(n = 0; n < NTRANSFORM; ++n)
1476       set_transform(&cs, whoami, 5, (char **)transform[n]);
1477   }
1478   if(!c->api) {
1479     if(c->speaker_command)
1480       c->api = xstrdup("command");
1481     else if(c->broadcast.af != -1)
1482       c->api = xstrdup("rtp");
1483     else if(config_uaudio_apis)
1484       c->api = xstrdup(config_uaudio_apis[0]->name);
1485     else
1486       c->api = xstrdup("<none>");
1487   }
1488   if(!strcmp(c->api, "network"))
1489     c->api = xstrdup("rtp");
1490   if(server) {
1491     if(!strcmp(c->api, "command") && !c->speaker_command)
1492       disorder_fatal(0, "'api command' but speaker_command is not set");
1493     if((!strcmp(c->api, "rtp")) && c->broadcast.af == -1)
1494       disorder_fatal(0, "'api rtp' but broadcast is not set");
1495   }
1496   /* Override sample format */
1497   if(!strcmp(c->api, "rtp")) {
1498     c->sample_format.rate = 44100;
1499     c->sample_format.channels = 2;
1500     c->sample_format.bits = 16;
1501     c->sample_format.endian = ENDIAN_NATIVE;
1502   }
1503   if(!strcmp(c->api, "coreaudio")) {
1504     c->sample_format.rate = 44100;
1505     c->sample_format.channels = 2;
1506     c->sample_format.bits = 16;
1507     c->sample_format.endian = ENDIAN_NATIVE;
1508   }
1509   if(!c->default_rights) {
1510     rights_type r = RIGHTS__MASK & ~(RIGHT_ADMIN|RIGHT_REGISTER
1511                                      |RIGHT_MOVE__MASK
1512                                      |RIGHT_SCRATCH__MASK
1513                                      |RIGHT_REMOVE__MASK);
1514     /* The idea is to approximate the meaning of the old 'restrict' directive
1515      * in the default rights if they are not overridden. */
1516     if(c->restrictions & RESTRICT_SCRATCH)
1517       r |= RIGHT_SCRATCH_MINE|RIGHT_SCRATCH_RANDOM;
1518     else
1519       r |= RIGHT_SCRATCH_ANY;
1520     if(!(c->restrictions & RESTRICT_MOVE))
1521       r |= RIGHT_MOVE_ANY;
1522     if(c->restrictions & RESTRICT_REMOVE)
1523       r |= RIGHT_REMOVE_MINE;
1524     else
1525       r |= RIGHT_REMOVE_ANY;
1526     c->default_rights = rights_string(r);
1527   }
1528 }
1529
1530 /** @brief (Re-)read the config file
1531  * @param server If set, do extra checking
1532  * @param oldconfig Old configuration for compatibility check
1533  * @return 0 on success, non-0 on error
1534  *
1535  * If @p oldconfig is set, then certain compatibility checks are done between
1536  * the old and new configurations.
1537  */
1538 int config_read(int server,
1539                 const struct config *oldconfig) {
1540   struct config *c;
1541   char *privconf;
1542   struct passwd *pw;
1543
1544   set_configfile();
1545   c = config_default();
1546   /* standalone Disobedience installs might not have a global config file */
1547   if(access(configfile, F_OK) == 0)
1548     if(config_include(c, configfile))
1549       return -1;
1550   /* if we can read the private config file, do */
1551   if((privconf = config_private())
1552      && access(privconf, R_OK) == 0
1553      && config_include(c, privconf))
1554     return -1;
1555   xfree(privconf);
1556   /* if there's a per-user system config file for this user, read it */
1557   if(config_per_user) {
1558     if(!(pw = getpwuid(getuid())))
1559       disorder_fatal(0, "cannot determine our username");
1560     if((privconf = config_usersysconf(pw))
1561        && access(privconf, F_OK) == 0
1562        && config_include(c, privconf))
1563       return -1;
1564     xfree(privconf);
1565     /* if we have a password file, read it */
1566     if((privconf = config_userconf(0, pw))
1567        && access(privconf, F_OK) == 0
1568        && config_include(c, privconf))
1569       return -1;
1570     xfree(privconf);
1571   }
1572   /* install default namepart and transform settings */
1573   config_postdefaults(c, server);
1574   if(oldconfig)  {
1575     int failed = 0;
1576     if(strcmp(c->home, oldconfig->home)) {
1577       disorder_error(0, "'home' cannot be changed without a restart");
1578       failed = 1;
1579     }
1580     if(strcmp(c->alias, oldconfig->alias)) {
1581       disorder_error(0, "'alias' cannot be changed without a restart");
1582       failed = 1;
1583     }
1584     if(strcmp(c->user, oldconfig->user)) {
1585       disorder_error(0, "'user' cannot be changed without a restart");
1586       failed = 1;
1587     }
1588     if(c->nice_speaker != oldconfig->nice_speaker) {
1589       disorder_error(0, "'nice_speaker' cannot be changed without a restart");
1590       /* ...but we accept the new config anyway */
1591     }
1592     if(c->nice_server != oldconfig->nice_server) {
1593       disorder_error(0, "'nice_server' cannot be changed without a restart");
1594       /* ...but we accept the new config anyway */
1595     }
1596     if(namepartlist_compare(&c->namepart, &oldconfig->namepart)) {
1597       disorder_error(0, "'namepart' settings cannot be changed without a restart");
1598       failed = 1;
1599     }
1600     if(stringlist_compare(&c->stopword, &oldconfig->stopword)) {
1601       disorder_error(0, "'stopword' settings cannot be changed without a restart");
1602       failed = 1;
1603     }
1604     if(failed) {
1605       disorder_error(0, "not installing incompatible new configuration");
1606       return -1;
1607     }
1608   }
1609   /* everything is good so we shall use the new config */
1610   config_free(config);
1611   /* warn about obsolete directives */
1612   if(c->restrictions)
1613     disorder_error(0, "'restrict' will be removed in a future version");
1614   if(c->allow.n)
1615     disorder_error(0, "'allow' will be removed in a future version");
1616   if(c->trust.n)
1617     disorder_error(0, "'trust' will be removed in a future version");
1618   if(!c->lock)
1619     disorder_error(0, "'lock' will be removed in a future version");
1620   if(c->gap)
1621     disorder_error(0, "'gap' will be removed in a future version");
1622   if(c->prefsync)
1623     disorder_error(0, "'prefsync' will be removed in a future version");
1624   config = c;
1625   return 0;
1626 }
1627
1628 /** @brief Return the path to the private configuration file */
1629 char *config_private(void) {
1630   char *s;
1631
1632   set_configfile();
1633   byte_xasprintf(&s, "%s.private", configfile);
1634   return s;
1635 }
1636
1637 /** @brief Return the path to user's personal configuration file */
1638 char *config_userconf(const char *home, const struct passwd *pw) {
1639   char *s;
1640
1641   if(!home && !pw && !(pw = getpwuid(getuid())))
1642     disorder_fatal(0, "cannot determine our username");
1643   byte_xasprintf(&s, "%s/.disorder/passwd", home ? home : pw->pw_dir);
1644   return s;
1645 }
1646
1647 /** @brief Return the path to user-specific system configuration */
1648 char *config_usersysconf(const struct passwd *pw) {
1649   char *s;
1650
1651   set_configfile();
1652   if(!strchr(pw->pw_name, '/')) {
1653     byte_xasprintf(&s, "%s.%s", configfile, pw->pw_name);
1654     return s;
1655   } else
1656     return 0;
1657 }
1658
1659 /** @brief Get a filename within the home directory
1660  * @param name Relative name
1661  * @return Full path
1662  */
1663 char *config_get_file(const char *name) {
1664   return config_get_file2(config, name);
1665 }
1666
1667 /** @brief Order two stringlists
1668  * @param a First stringlist
1669  * @param b Second stringlist
1670  * @return <0, 0 or >0 if a<b, a=b or a>b
1671  */
1672 static int stringlist_compare(const struct stringlist *a,
1673                               const struct stringlist *b) {
1674   int n = 0, c;
1675
1676   while(n < a->n && n < b->n) {
1677     if((c = strcmp(a->s[n], b->s[n])))
1678       return c;
1679     ++n;
1680   }
1681   if(a->n < b->n)
1682     return -1;
1683   else if(a->n > b->n)
1684     return 1;
1685   else
1686     return 0;
1687 }
1688
1689 /** @brief Order two namepart definitions
1690  * @param a First namepart definition
1691  * @param b Second namepart definition
1692  * @return <0, 0 or >0 if a<b, a=b or a>b
1693  */
1694 static int namepart_compare(const struct namepart *a,
1695                             const struct namepart *b) {
1696   int c;
1697
1698   if((c = strcmp(a->part, b->part)))
1699     return c;
1700   if((c = strcmp(a->res, b->res)))
1701     return c;
1702   if((c = strcmp(a->replace, b->replace)))
1703     return c;
1704   if((c = strcmp(a->context, b->context)))
1705     return c;
1706   if(a->reflags > b->reflags)
1707     return 1;
1708   if(a->reflags < b->reflags)
1709     return -1;
1710   return 0;
1711 }
1712
1713 /** @brief Order two lists of namepart definitions
1714  * @param a First list of namepart definitions
1715  * @param b Second list of namepart definitions
1716  * @return <0, 0 or >0 if a<b, a=b or a>b
1717  */
1718 static int namepartlist_compare(const struct namepartlist *a,
1719                                 const struct namepartlist *b) {
1720   int n = 0, c;
1721
1722   while(n < a->n && n < b->n) {
1723     if((c = namepart_compare(&a->s[n], &b->s[n])))
1724       return c;
1725     ++n;
1726   }
1727   if(a->n > b->n)
1728     return 1;
1729   else if(a->n < b->n)
1730     return -1;
1731   else
1732     return 0;
1733 }
1734
1735 /*
1736 Local Variables:
1737 c-basic-offset:2
1738 comment-column:40
1739 fill-column:79
1740 End:
1741 */