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

   1 /*
   2  * This file is part of DisOrder.
   3  * Copyright (C) 2004-2008 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 2 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, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * 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, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19  * USA
  20  */
  21 /** @file lib/configuration.c
  22  * @brief Configuration file support
  23  */
  24
  25 #include <config.h>
  26 #include "types.h"
  27
  28 #include <stdio.h>
  29 #include <string.h>
  30 #include <stdlib.h>
  31 #include <errno.h>
  32 #include <sys/types.h>
  33 #include <sys/stat.h>
  34 #include <unistd.h>
  35 #include <ctype.h>
  36 #include <stddef.h>
  37 #include <pwd.h>
  38 #include <langinfo.h>
  39 #include <pcre.h>
  40 #include <signal.h>
  41
  42 #include "rights.h"
  43 #include "configuration.h"
  44 #include "mem.h"
  45 #include "log.h"
  46 #include "split.h"
  47 #include "syscalls.h"
  48 #include "table.h"
  49 #include "inputline.h"
  50 #include "charset.h"
  51 #include "defs.h"
  52 #include "mixer.h"
  53 #include "printf.h"
  54 #include "regsub.h"
  55 #include "signame.h"
  56 #include "authhash.h"
  57 #include "vector.h"
  58
  59 /** @brief Path to config file
  60  *
  61  * set_configfile() sets the deafult if it is null.
  62  */
  63 char *configfile;
  64
  65 /** @brief Read user configuration
  66  *
  67  * If clear, the user-specific configuration is not read.
  68  */
  69 int config_per_user = 1;
  70
  71 /** @brief Config file parser state */
  72 struct config_state {
  73   /** @brief Filename */
  74   const char *path;
  75   /** @brief Line number */
  76   int line;
  77   /** @brief Configuration object under construction */
  78   struct config *config;
  79 };
  80
  81 /** @brief Current configuration */
  82 struct config *config;
  83
  84 /** @brief One configuration item */
  85 struct conf {
  86   /** @brief Name as it appears in the config file */
  87   const char *name;
  88   /** @brief Offset in @ref config structure */
  89   size_t offset;
  90   /** @brief Pointer to item type */
  91   const struct conftype *type;
  92   /** @brief Pointer to item-specific validation routine */
  93   int (*validate)(const struct config_state *cs,
  94                   int nvec, char **vec);
  95 };
  96
  97 /** @brief Type of a configuration item */
  98 struct conftype {
  99   /** @brief Pointer to function to set item */
 100   int (*set)(const struct config_state *cs,
 101              const struct conf *whoami,
 102              int nvec, char **vec);
 103   /** @brief Pointer to function to free item */
 104   void (*free)(struct config *c, const struct conf *whoami);
 105 };
 106
 107 /** @brief Compute the address of an item */
 108 #define ADDRESS(C, TYPE) ((TYPE *)((char *)(C) + whoami->offset))
 109 /** @brief Return the value of an item */
 110 #define VALUE(C, TYPE) (*ADDRESS(C, TYPE))
 111
 112 static int set_signal(const struct config_state *cs,
 113                       const struct conf *whoami,
 114                       int nvec, char **vec) {
 115   int n;
 116
 117   if(nvec != 1) {
 118     error(0, "%s:%d: '%s' requires one argument",
 119           cs->path, cs->line, whoami->name);
 120     return -1;
 121   }
 122   if((n = find_signal(vec[0])) == -1) {
 123     error(0, "%s:%d: unknown signal '%s'",
 124           cs->path, cs->line, vec[0]);
 125     return -1;
 126   }
 127   VALUE(cs->config, int) = n;
 128   return 0;
 129 }
 130
 131 static int set_collections(const struct config_state *cs,
 132                            const struct conf *whoami,
 133                            int nvec, char **vec) {
 134   struct collectionlist *cl;
 135   const char *root, *encoding, *module;
 136
 137   switch(nvec) {
 138   case 1:
 139     module = 0;
 140     encoding = 0;
 141     root = vec[0];
 142     break;
 143   case 2:
 144     module = vec[0];
 145     encoding = 0;
 146     root = vec[1];
 147     break;
 148   case 3:
 149     module = vec[0];
 150     encoding = vec[1];
 151     root = vec[2];
 152     break;
 153   case 0:
 154     error(0, "%s:%d: '%s' requires at least one argument",
 155           cs->path, cs->line, whoami->name);
 156     return -1;
 157   default:
 158     error(0, "%s:%d: '%s' requires at most three arguments",
 159           cs->path, cs->line, whoami->name);
 160     return -1;
 161   }
 162   /* Sanity check root */
 163   if(root[0] != '/') {
 164     error(0, "%s:%d: collection root must start with '/'",
 165           cs->path, cs->line);
 166     return -1;
 167   }
 168   if(root[1] && root[strlen(root)-1] == '/') {
 169     error(0, "%s:%d: collection root must not end with '/'",
 170           cs->path, cs->line);
 171     return -1;
 172   }
 173   /* Defaults */
 174   if(!module)
 175     module = "fs";
 176   if(!encoding)
 177     encoding = nl_langinfo(CODESET);
 178   cl = ADDRESS(cs->config, struct collectionlist);
 179   ++cl->n;
 180   cl->s = xrealloc(cl->s, cl->n * sizeof (struct collection));
 181   cl->s[cl->n - 1].module = xstrdup(module);
 182   cl->s[cl->n - 1].encoding = xstrdup(encoding);
 183   cl->s[cl->n - 1].root = xstrdup(root);
 184   return 0;
 185 }
 186
 187 static int set_boolean(const struct config_state *cs,
 188                        const struct conf *whoami,
 189                        int nvec, char **vec) {
 190   int state;
 191
 192   if(nvec != 1) {
 193     error(0, "%s:%d: '%s' takes only one argument",
 194           cs->path, cs->line, whoami->name);
 195     return -1;
 196   }
 197   if(!strcmp(vec[0], "yes")) state = 1;
 198   else if(!strcmp(vec[0], "no")) state = 0;
 199   else {
 200     error(0, "%s:%d: argument to '%s' must be 'yes' or 'no'",
 201           cs->path, cs->line, whoami->name);
 202     return -1;
 203   }
 204   VALUE(cs->config, int) = state;
 205   return 0;
 206 }
 207
 208 static int set_string(const struct config_state *cs,
 209                       const struct conf *whoami,
 210                       int nvec, char **vec) {
 211   if(nvec != 1) {
 212     error(0, "%s:%d: '%s' takes only one argument",
 213           cs->path, cs->line, whoami->name);
 214     return -1;
 215   }
 216   VALUE(cs->config, char *) = xstrdup(vec[0]);
 217   return 0;
 218 }
 219
 220 static int set_stringlist(const struct config_state *cs,
 221                           const struct conf *whoami,
 222                           int nvec, char **vec) {
 223   int n;
 224   struct stringlist *sl;
 225
 226   sl = ADDRESS(cs->config, struct stringlist);
 227   sl->n = 0;
 228   for(n = 0; n < nvec; ++n) {
 229     sl->n++;
 230     sl->s = xrealloc(sl->s, (sl->n * sizeof (char *)));
 231     sl->s[sl->n - 1] = xstrdup(vec[n]);
 232   }
 233   return 0;
 234 }
 235
 236 static int set_integer(const struct config_state *cs,
 237                        const struct conf *whoami,
 238                        int nvec, char **vec) {
 239   char *e;
 240
 241   if(nvec != 1) {
 242     error(0, "%s:%d: '%s' takes only one argument",
 243           cs->path, cs->line, whoami->name);
 244     return -1;
 245   }
 246   if(xstrtol(ADDRESS(cs->config, long), vec[0], &e, 0)) {
 247     error(errno, "%s:%d: converting integer", cs->path, cs->line);
 248     return -1;
 249   }
 250   if(*e) {
 251     error(0, "%s:%d: invalid integer syntax", cs->path, cs->line);
 252     return -1;
 253   }
 254   return 0;
 255 }
 256
 257 static int set_stringlist_accum(const struct config_state *cs,
 258                                 const struct conf *whoami,
 259                                 int nvec, char **vec) {
 260   int n;
 261   struct stringlist *s;
 262   struct stringlistlist *sll;
 263
 264   sll = ADDRESS(cs->config, struct stringlistlist);
 265   if(nvec == 0) {
 266     sll->n = 0;
 267     return 0;
 268   }
 269   sll->n++;
 270   sll->s = xrealloc(sll->s, (sll->n * sizeof (struct stringlist)));
 271   s = &sll->s[sll->n - 1];
 272   s->n = nvec;
 273   s->s = xmalloc((nvec + 1) * sizeof (char *));
 274   for(n = 0; n < nvec; ++n)
 275     s->s[n] = xstrdup(vec[n]);
 276   return 0;
 277 }
 278
 279 static int set_string_accum(const struct config_state *cs,
 280                             const struct conf *whoami,
 281                             int nvec, char **vec) {
 282   int n;
 283   struct stringlist *sl;
 284
 285   sl = ADDRESS(cs->config, struct stringlist);
 286   if(nvec == 0) {
 287     sl->n = 0;
 288     return 0;
 289   }
 290   for(n = 0; n < nvec; ++n) {
 291     sl->n++;
 292     sl->s = xrealloc(sl->s, (sl->n * sizeof (char *)));
 293     sl->s[sl->n - 1] = xstrdup(vec[n]);
 294   }
 295   return 0;
 296 }
 297
 298 static int set_restrict(const struct config_state *cs,
 299                         const struct conf *whoami,
 300                         int nvec, char **vec) {
 301   unsigned r = 0;
 302   int n, i;
 303
 304   static const struct restriction {
 305     const char *name;
 306     unsigned bit;
 307   } restrictions[] = {
 308     { "remove", RESTRICT_REMOVE },
 309     { "scratch", RESTRICT_SCRATCH },
 310     { "move", RESTRICT_MOVE },
 311   };
 312
 313   for(n = 0; n < nvec; ++n) {
 314     if((i = TABLE_FIND(restrictions, struct restriction, name, vec[n])) < 0) {
 315       error(0, "%s:%d: invalid restriction '%s'",
 316             cs->path, cs->line, vec[n]);
 317       return -1;
 318     }
 319     r |= restrictions[i].bit;
 320   }
 321   VALUE(cs->config, unsigned) = r;
 322   return 0;
 323 }
 324
 325 static int parse_sample_format(const struct config_state *cs,
 326                                struct stream_header *format,
 327                                int nvec, char **vec) {
 328   char *p = vec[0];
 329   long t;
 330
 331   if(nvec != 1) {
 332     error(0, "%s:%d: wrong number of arguments", cs->path, cs->line);
 333     return -1;
 334   }
 335   if(xstrtol(&t, p, &p, 0)) {
 336     error(errno, "%s:%d: converting bits-per-sample", cs->path, cs->line);
 337     return -1;
 338   }
 339   if(t != 8 && t != 16) {
 340     error(0, "%s:%d: bad bite-per-sample (%ld)", cs->path, cs->line, t);
 341     return -1;
 342   }
 343   if(format) format->bits = t;
 344   switch (*p) {
 345     case 'l': case 'L': t = ENDIAN_LITTLE; p++; break;
 346     case 'b': case 'B': t = ENDIAN_BIG; p++; break;
 347     default: t = ENDIAN_NATIVE; break;
 348   }
 349   if(format) format->endian = t;
 350   if(*p != '/') {
 351     error(errno, "%s:%d: expected `/' after bits-per-sample",
 352           cs->path, cs->line);
 353     return -1;
 354   }
 355   p++;
 356   if(xstrtol(&t, p, &p, 0)) {
 357     error(errno, "%s:%d: converting sample-rate", cs->path, cs->line);
 358     return -1;
 359   }
 360   if(t < 1 || t > INT_MAX) {
 361     error(0, "%s:%d: silly sample-rate (%ld)", cs->path, cs->line, t);
 362     return -1;
 363   }
 364   if(format) format->rate = t;
 365   if(*p != '/') {
 366     error(0, "%s:%d: expected `/' after sample-rate",
 367           cs->path, cs->line);
 368     return -1;
 369   }
 370   p++;
 371   if(xstrtol(&t, p, &p, 0)) {
 372     error(errno, "%s:%d: converting channels", cs->path, cs->line);
 373     return -1;
 374   }
 375   if(t < 1 || t > 8) {
 376     error(0, "%s:%d: silly number (%ld) of channels", cs->path, cs->line, t);
 377     return -1;
 378   }
 379   if(format) format->channels = t;
 380   if(*p) {
 381     error(0, "%s:%d: junk after channels", cs->path, cs->line);
 382     return -1;
 383   }
 384   return 0;
 385 }
 386
 387 static int set_sample_format(const struct config_state *cs,
 388                              const struct conf *whoami,
 389                              int nvec, char **vec) {
 390   return parse_sample_format(cs, ADDRESS(cs->config, struct stream_header),
 391                              nvec, vec);
 392 }
 393
 394 static int set_namepart(const struct config_state *cs,
 395                         const struct conf *whoami,
 396                         int nvec, char **vec) {
 397   struct namepartlist *npl = ADDRESS(cs->config, struct namepartlist);
 398   unsigned reflags;
 399   const char *errstr;
 400   int erroffset, n;
 401   pcre *re;
 402
 403   if(nvec < 3) {
 404     error(0, "%s:%d: namepart needs at least 3 arguments", cs->path, cs->line);
 405     return -1;
 406   }
 407   if(nvec > 5) {
 408     error(0, "%s:%d: namepart needs at most 5 arguments", cs->path, cs->line);
 409     return -1;
 410   }
 411   reflags = nvec >= 5 ? regsub_flags(vec[4]) : 0;
 412   if(!(re = pcre_compile(vec[1],
 413                          PCRE_UTF8
 414                          |regsub_compile_options(reflags),
 415                          &errstr, &erroffset, 0))) {
 416     error(0, "%s:%d: error compiling regexp /%s/: %s (offset %d)",
 417           cs->path, cs->line, vec[1], errstr, erroffset);
 418     return -1;
 419   }
 420   npl->s = xrealloc(npl->s, (npl->n + 1) * sizeof (struct namepart));
 421   npl->s[npl->n].part = xstrdup(vec[0]);
 422   npl->s[npl->n].re = re;
 423   npl->s[npl->n].replace = xstrdup(vec[2]);
 424   npl->s[npl->n].context = xstrdup(vec[3]);
 425   npl->s[npl->n].reflags = reflags;
 426   ++npl->n;
 427   /* XXX a bit of a bodge; relies on there being very few parts. */
 428   for(n = 0; (n < cs->config->nparts
 429               && strcmp(cs->config->parts[n], vec[0])); ++n)
 430     ;
 431   if(n >= cs->config->nparts) {
 432     cs->config->parts = xrealloc(cs->config->parts,
 433                                  (cs->config->nparts + 1) * sizeof (char *));
 434     cs->config->parts[cs->config->nparts++] = xstrdup(vec[0]);
 435   }
 436   return 0;
 437 }
 438
 439 static int set_transform(const struct config_state *cs,
 440                          const struct conf *whoami,
 441                          int nvec, char **vec) {
 442   struct transformlist *tl = ADDRESS(cs->config, struct transformlist);
 443   pcre *re;
 444   unsigned reflags;
 445   const char *errstr;
 446   int erroffset;
 447
 448   if(nvec < 3) {
 449     error(0, "%s:%d: transform needs at least 3 arguments", cs->path, cs->line);
 450     return -1;
 451   }
 452   if(nvec > 5) {
 453     error(0, "%s:%d: transform needs at most 5 arguments", cs->path, cs->line);
 454     return -1;
 455   }
 456   reflags = (nvec >= 5 ? regsub_flags(vec[4]) : 0);
 457   if(!(re = pcre_compile(vec[1],
 458                          PCRE_UTF8
 459                          |regsub_compile_options(reflags),
 460                          &errstr, &erroffset, 0))) {
 461     error(0, "%s:%d: error compiling regexp /%s/: %s (offset %d)",
 462           cs->path, cs->line, vec[1], errstr, erroffset);
 463     return -1;
 464   }
 465   tl->t = xrealloc(tl->t, (tl->n + 1) * sizeof (struct namepart));
 466   tl->t[tl->n].type = xstrdup(vec[0]);
 467   tl->t[tl->n].context = xstrdup(vec[3] ? vec[3] : "*");
 468   tl->t[tl->n].re = re;
 469   tl->t[tl->n].replace = xstrdup(vec[2]);
 470   tl->t[tl->n].flags = reflags;
 471   ++tl->n;
 472   return 0;
 473 }
 474
 475 static int set_backend(const struct config_state *cs,
 476                        const struct conf *whoami,
 477                        int nvec, char **vec) {
 478   int *const valuep = ADDRESS(cs->config, int);
 479
 480   if(nvec != 1) {
 481     error(0, "%s:%d: '%s' requires one argument",
 482           cs->path, cs->line, whoami->name);
 483     return -1;
 484   }
 485   if(!strcmp(vec[0], "alsa")) {
 486 #if HAVE_ALSA_ASOUNDLIB_H
 487     *valuep = BACKEND_ALSA;
 488 #else
 489     error(0, "%s:%d: ALSA is not available on this platform",
 490           cs->path, cs->line);
 491     return -1;
 492 #endif
 493   } else if(!strcmp(vec[0], "command"))
 494     *valuep = BACKEND_COMMAND;
 495   else if(!strcmp(vec[0], "network"))
 496     *valuep = BACKEND_NETWORK;
 497   else if(!strcmp(vec[0], "coreaudio")) {
 498 #if HAVE_COREAUDIO_AUDIOHARDWARE_H
 499     *valuep = BACKEND_COREAUDIO;
 500 #else
 501     error(0, "%s:%d: Core Audio is not available on this platform",
 502           cs->path, cs->line);
 503     return -1;
 504 #endif
 505   } else if(!strcmp(vec[0], "oss")) {
 506 #if HAVE_SYS_SOUNDCARD_H
 507     *valuep = BACKEND_OSS;
 508 #else
 509     error(0, "%s:%d: OSS is not available on this platform",
 510           cs->path, cs->line);
 511     return -1;
 512 #endif
 513   } else {
 514     error(0, "%s:%d: invalid '%s' value '%s'",
 515           cs->path, cs->line, whoami->name, vec[0]);
 516     return -1;
 517   }
 518   return 0;
 519 }
 520
 521 static int set_rights(const struct config_state *cs,
 522                       const struct conf *whoami,
 523                       int nvec, char **vec) {
 524   if(nvec != 1) {
 525     error(0, "%s:%d: '%s' requires one argument",
 526           cs->path, cs->line, whoami->name);
 527     return -1;
 528   }
 529   if(parse_rights(vec[0], 0, 1)) {
 530     error(0, "%s:%d: invalid rights string '%s'",
 531           cs->path, cs->line, vec[0]);
 532     return -1;
 533   }
 534   *ADDRESS(cs->config, char *) = vec[0];
 535   return 0;
 536 }
 537
 538 /* free functions */
 539
 540 static void free_none(struct config attribute((unused)) *c,
 541                       const struct conf attribute((unused)) *whoami) {
 542 }
 543
 544 static void free_string(struct config *c,
 545                         const struct conf *whoami) {
 546   xfree(VALUE(c, char *));
 547 }
 548
 549 static void free_stringlist(struct config *c,
 550                             const struct conf *whoami) {
 551   int n;
 552   struct stringlist *sl = ADDRESS(c, struct stringlist);
 553
 554   for(n = 0; n < sl->n; ++n)
 555     xfree(sl->s[n]);
 556   xfree(sl->s);
 557 }
 558
 559 static void free_stringlistlist(struct config *c,
 560                                 const struct conf *whoami) {
 561   int n, m;
 562   struct stringlistlist *sll = ADDRESS(c, struct stringlistlist);
 563   struct stringlist *sl;
 564
 565   for(n = 0; n < sll->n; ++n) {
 566     sl = &sll->s[n];
 567     for(m = 0; m < sl->n; ++m)
 568       xfree(sl->s[m]);
 569     xfree(sl->s);
 570   }
 571   xfree(sll->s);
 572 }
 573
 574 static void free_collectionlist(struct config *c,
 575                                 const struct conf *whoami) {
 576   struct collectionlist *cll = ADDRESS(c, struct collectionlist);
 577   struct collection *cl;
 578   int n;
 579
 580   for(n = 0; n < cll->n; ++n) {
 581     cl = &cll->s[n];
 582     xfree(cl->module);
 583     xfree(cl->encoding);
 584     xfree(cl->root);
 585   }
 586   xfree(cll->s);
 587 }
 588
 589 static void free_namepartlist(struct config *c,
 590                               const struct conf *whoami) {
 591   struct namepartlist *npl = ADDRESS(c, struct namepartlist);
 592   struct namepart *np;
 593   int n;
 594
 595   for(n = 0; n < npl->n; ++n) {
 596     np = &npl->s[n];
 597     xfree(np->part);
 598     pcre_free(np->re);                  /* ...whatever pcre_free is set to. */
 599     xfree(np->replace);
 600     xfree(np->context);
 601   }
 602   xfree(npl->s);
 603 }
 604
 605 static void free_transformlist(struct config *c,
 606                                const struct conf *whoami) {
 607   struct transformlist *tl = ADDRESS(c, struct transformlist);
 608   struct transform *t;
 609   int n;
 610
 611   for(n = 0; n < tl->n; ++n) {
 612     t = &tl->t[n];
 613     xfree(t->type);
 614     pcre_free(t->re);                   /* ...whatever pcre_free is set to. */
 615     xfree(t->replace);
 616     xfree(t->context);
 617   }
 618   xfree(tl->t);
 619 }
 620
 621 /* configuration types */
 622
 623 static const struct conftype
 624   type_signal = { set_signal, free_none },
 625   type_collections = { set_collections, free_collectionlist },
 626   type_boolean = { set_boolean, free_none },
 627   type_string = { set_string, free_string },
 628   type_stringlist = { set_stringlist, free_stringlist },
 629   type_integer = { set_integer, free_none },
 630   type_stringlist_accum = { set_stringlist_accum, free_stringlistlist },
 631   type_string_accum = { set_string_accum, free_stringlist },
 632   type_sample_format = { set_sample_format, free_none },
 633   type_restrict = { set_restrict, free_none },
 634   type_namepart = { set_namepart, free_namepartlist },
 635   type_transform = { set_transform, free_transformlist },
 636   type_rights = { set_rights, free_none },
 637   type_backend = { set_backend, free_none };
 638
 639 /* specific validation routine */
 640
 641 #define VALIDATE_FILE(test, what) do {                          \
 642   struct stat sb;                                               \
 643   int n;                                                        \
 644                                                                 \
 645   for(n = 0; n < nvec; ++n) {                                   \
 646     if(stat(vec[n], &sb) < 0) {                                 \
 647       error(errno, "%s:%d: %s", cs->path, cs->line, vec[n]);    \
 648       return -1;                                                \
 649     }                                                           \
 650     if(!test(sb.st_mode)) {                                     \
 651       error(0, "%s:%d: %s is not a %s",                         \
 652             cs->path, cs->line, vec[n], what);                  \
 653       return -1;                                                \
 654     }                                                           \
 655   }                                                             \
 656 } while(0)
 657
 658 static int validate_isabspath(const struct config_state *cs,
 659                               int nvec, char **vec) {
 660   int n;
 661
 662   for(n = 0; n < nvec; ++n)
 663     if(vec[n][0] != '/') {
 664       error(errno, "%s:%d: %s: not an absolute path",
 665             cs->path, cs->line, vec[n]);
 666       return -1;
 667     }
 668   return 0;
 669 }
 670
 671 static int validate_isdir(const struct config_state *cs,
 672                           int nvec, char **vec) {
 673   VALIDATE_FILE(S_ISDIR, "directory");
 674   return 0;
 675 }
 676
 677 static int validate_isreg(const struct config_state *cs,
 678                           int nvec, char **vec) {
 679   VALIDATE_FILE(S_ISREG, "regular file");
 680   return 0;
 681 }
 682
 683 static int validate_player(const struct config_state *cs,
 684                            int nvec,
 685                            char attribute((unused)) **vec) {
 686   if(nvec < 2) {
 687     error(0, "%s:%d: should be at least 'player PATTERN MODULE'",
 688           cs->path, cs->line);
 689     return -1;
 690   }
 691   return 0;
 692 }
 693
 694 static int validate_tracklength(const struct config_state *cs,
 695                                 int nvec,
 696                                 char attribute((unused)) **vec) {
 697   if(nvec < 2) {
 698     error(0, "%s:%d: should be at least 'tracklength PATTERN MODULE'",
 699           cs->path, cs->line);
 700     return -1;
 701   }
 702   return 0;
 703 }
 704
 705 static int validate_allow(const struct config_state *cs,
 706                           int nvec,
 707                           char attribute((unused)) **vec) {
 708   if(nvec != 2) {
 709     error(0, "%s:%d: must be 'allow NAME PASS'", cs->path, cs->line);
 710     return -1;
 711   }
 712   return 0;
 713 }
 714
 715 static int validate_non_negative(const struct config_state *cs,
 716                                  int nvec, char **vec) {
 717   long n;
 718
 719   if(nvec < 1) {
 720     error(0, "%s:%d: missing argument", cs->path, cs->line);
 721     return -1;
 722   }
 723   if(nvec > 1) {
 724     error(0, "%s:%d: too many arguments", cs->path, cs->line);
 725     return -1;
 726   }
 727   if(xstrtol(&n, vec[0], 0, 0)) {
 728     error(0, "%s:%d: %s", cs->path, cs->line, strerror(errno));
 729     return -1;
 730   }
 731   if(n < 0) {
 732     error(0, "%s:%d: must not be negative", cs->path, cs->line);
 733     return -1;
 734   }
 735   return 0;
 736 }
 737
 738 static int validate_positive(const struct config_state *cs,
 739                           int nvec, char **vec) {
 740   long n;
 741
 742   if(nvec < 1) {
 743     error(0, "%s:%d: missing argument", cs->path, cs->line);
 744     return -1;
 745   }
 746   if(nvec > 1) {
 747     error(0, "%s:%d: too many arguments", cs->path, cs->line);
 748     return -1;
 749   }
 750   if(xstrtol(&n, vec[0], 0, 0)) {
 751     error(0, "%s:%d: %s", cs->path, cs->line, strerror(errno));
 752     return -1;
 753   }
 754   if(n <= 0) {
 755     error(0, "%s:%d: must be positive", cs->path, cs->line);
 756     return -1;
 757   }
 758   return 0;
 759 }
 760
 761 static int validate_isauser(const struct config_state *cs,
 762                             int attribute((unused)) nvec,
 763                             char **vec) {
 764   struct passwd *pw;
 765
 766   if(!(pw = getpwnam(vec[0]))) {
 767     error(0, "%s:%d: no such user as '%s'", cs->path, cs->line, vec[0]);
 768     return -1;
 769   }
 770   return 0;
 771 }
 772
 773 static int validate_sample_format(const struct config_state *cs,
 774                                   int attribute((unused)) nvec,
 775                                   char **vec) {
 776   return parse_sample_format(cs, 0, nvec, vec);
 777 }
 778
 779 static int validate_any(const struct config_state attribute((unused)) *cs,
 780                         int attribute((unused)) nvec,
 781                         char attribute((unused)) **vec) {
 782   return 0;
 783 }
 784
 785 static int validate_url(const struct config_state attribute((unused)) *cs,
 786                         int attribute((unused)) nvec,
 787                         char **vec) {
 788   const char *s;
 789   int n;
 790   /* absoluteURI   = scheme ":" ( hier_part | opaque_part )
 791      scheme        = alpha *( alpha | digit | "+" | "-" | "." ) */
 792   s = vec[0];
 793   n = strspn(s, ("abcdefghijklmnopqrstuvwxyz"
 794                  "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
 795                  "0123456789"));
 796   if(s[n] != ':') {
 797     error(0, "%s:%d: invalid url '%s'", cs->path, cs->line, vec[0]);
 798     return -1;
 799   }
 800   if(!strncmp(s, "http:", 5)
 801      || !strncmp(s, "https:", 6)) {
 802     s += n + 1;
 803     /* we only do a rather cursory check */
 804     if(strncmp(s, "//", 2)) {
 805       error(0, "%s:%d: invalid url '%s'", cs->path, cs->line, vec[0]);
 806       return -1;
 807     }
 808   }
 809   return 0;
 810 }
 811
 812 static int validate_alias(const struct config_state *cs,
 813                           int nvec,
 814                           char **vec) {
 815   const char *s;
 816   int in_brackets = 0, c;
 817
 818   if(nvec < 1) {
 819     error(0, "%s:%d: missing argument", cs->path, cs->line);
 820     return -1;
 821   }
 822   if(nvec > 1) {
 823     error(0, "%s:%d: too many arguments", cs->path, cs->line);
 824     return -1;
 825   }
 826   s = vec[0];
 827   while((c = (unsigned char)*s++)) {
 828     if(in_brackets) {
 829       if(c == '}')
 830         in_brackets = 0;
 831       else if(!isalnum(c)) {
 832         error(0, "%s:%d: invalid part name in alias expansion in '%s'",
 833               cs->path, cs->line, vec[0]);
 834           return -1;
 835       }
 836     } else {
 837       if(c == '{') {
 838         in_brackets = 1;
 839         if(*s == '/')
 840           ++s;
 841       } else if(c == '\\') {
 842         if(!(c = (unsigned char)*s++)) {
 843           error(0, "%s:%d: unterminated escape in alias expansion in '%s'",
 844                 cs->path, cs->line, vec[0]);
 845           return -1;
 846         } else if(c != '\\' && c != '{') {
 847           error(0, "%s:%d: invalid escape in alias expansion in '%s'",
 848                 cs->path, cs->line, vec[0]);
 849           return -1;
 850         }
 851       }
 852     }
 853     ++s;
 854   }
 855   if(in_brackets) {
 856     error(0, "%s:%d: unterminated part name in alias expansion in '%s'",
 857           cs->path, cs->line, vec[0]);
 858     return -1;
 859   }
 860   return 0;
 861 }
 862
 863 static int validate_addrport(const struct config_state attribute((unused)) *cs,
 864                              int nvec,
 865                              char attribute((unused)) **vec) {
 866   switch(nvec) {
 867   case 0:
 868     error(0, "%s:%d: missing address",
 869           cs->path, cs->line);
 870     return -1;
 871   case 1:
 872     error(0, "%s:%d: missing port name/number",
 873           cs->path, cs->line);
 874     return -1;
 875   case 2:
 876     return 0;
 877   default:
 878     error(0, "%s:%d: expected ADDRESS PORT",
 879           cs->path, cs->line);
 880     return -1;
 881   }
 882 }
 883
 884 static int validate_port(const struct config_state attribute((unused)) *cs,
 885                          int nvec,
 886                          char attribute((unused)) **vec) {
 887   switch(nvec) {
 888   case 0:
 889     error(0, "%s:%d: missing address",
 890           cs->path, cs->line);
 891     return -1;
 892   case 1:
 893   case 2:
 894     return 0;
 895   default:
 896     error(0, "%s:%d: expected [ADDRESS] PORT",
 897           cs->path, cs->line);
 898     return -1;
 899   }
 900 }
 901
 902 static int validate_algo(const struct config_state attribute((unused)) *cs,
 903                          int nvec,
 904                          char **vec) {
 905   if(nvec != 1) {
 906     error(0, "%s:%d: invalid algorithm specification", cs->path, cs->line);
 907     return -1;
 908   }
 909   if(!valid_authhash(vec[0])) {
 910     error(0, "%s:%d: unsuported algorithm '%s'", cs->path, cs->line, vec[0]);
 911     return -1;
 912   }
 913   return 0;
 914 }
 915
 916 /** @brief Item name and and offset */
 917 #define C(x) #x, offsetof(struct config, x)
 918 /** @brief Item name and and offset */
 919 #define C2(x,y) #x, offsetof(struct config, y)
 920
 921 /** @brief All configuration items */
 922 static const struct conf conf[] = {
 923   { C(alias),            &type_string,           validate_alias },
 924   { C(allow),            &type_stringlist_accum, validate_allow },
 925   { C(api),              &type_backend,          validate_any },
 926   { C(authorization_algorithm), &type_string,    validate_algo },
 927   { C(broadcast),        &type_stringlist,       validate_addrport },
 928   { C(broadcast_from),   &type_stringlist,       validate_addrport },
 929   { C(channel),          &type_string,           validate_any },
 930   { C(checkpoint_kbyte), &type_integer,          validate_non_negative },
 931   { C(checkpoint_min),   &type_integer,          validate_non_negative },
 932   { C(collection),       &type_collections,      validate_any },
 933   { C(connect),          &type_stringlist,       validate_addrport },
 934   { C(cookie_login_lifetime),  &type_integer,    validate_positive },
 935   { C(cookie_key_lifetime),  &type_integer,      validate_positive },
 936   { C(dbversion),        &type_integer,          validate_positive },
 937   { C(default_rights),   &type_rights,           validate_any },
 938   { C(device),           &type_string,           validate_any },
 939   { C(gap),              &type_integer,          validate_non_negative },
 940   { C(history),          &type_integer,          validate_positive },
 941   { C(home),             &type_string,           validate_isabspath },
 942   { C(listen),           &type_stringlist,       validate_port },
 943   { C(lock),             &type_boolean,          validate_any },
 944   { C(mail_sender),      &type_string,           validate_any },
 945   { C(mixer),            &type_string,           validate_any },
 946   { C(multicast_loop),   &type_boolean,          validate_any },
 947   { C(multicast_ttl),    &type_integer,          validate_non_negative },
 948   { C(namepart),         &type_namepart,         validate_any },
 949   { C(new_max),          &type_integer,          validate_positive },
 950   { C2(nice, nice_rescan), &type_integer,        validate_non_negative },
 951   { C(nice_rescan),      &type_integer,          validate_non_negative },
 952   { C(nice_server),      &type_integer,          validate_any },
 953   { C(nice_speaker),     &type_integer,          validate_any },
 954   { C(noticed_history),  &type_integer,          validate_positive },
 955   { C(password),         &type_string,           validate_any },
 956   { C(player),           &type_stringlist_accum, validate_player },
 957   { C(plugins),          &type_string_accum,     validate_isdir },
 958   { C(prefsync),         &type_integer,          validate_positive },
 959   { C(queue_pad),        &type_integer,          validate_positive },
 960   { C(replay_min),       &type_integer,          validate_non_negative },
 961   { C(refresh),          &type_integer,          validate_positive },
 962   { C(reminder_interval), &type_integer,         validate_positive },
 963   { C2(restrict, restrictions),         &type_restrict,         validate_any },
 964   { C(sample_format),    &type_sample_format,    validate_sample_format },
 965   { C(scratch),          &type_string_accum,     validate_isreg },
 966   { C(short_display),    &type_integer,          validate_positive },
 967   { C(signal),           &type_signal,           validate_any },
 968   { C(smtp_server),      &type_string,           validate_any },
 969   { C(sox_generation),   &type_integer,          validate_non_negative },
 970   { C2(speaker_backend, api),  &type_backend,          validate_any },
 971   { C(speaker_command),  &type_string,           validate_any },
 972   { C(stopword),         &type_string_accum,     validate_any },
 973   { C(templates),        &type_string_accum,     validate_isdir },
 974   { C(tracklength),      &type_stringlist_accum, validate_tracklength },
 975   { C(transform),        &type_transform,        validate_any },
 976   { C(trust),            &type_string_accum,     validate_any },
 977   { C(url),              &type_string,           validate_url },
 978   { C(user),             &type_string,           validate_isauser },
 979   { C(username),         &type_string,           validate_any },
 980 };
 981
 982 /** @brief Find a configuration item's definition by key */
 983 static const struct conf *find(const char *key) {
 984   int n;
 985
 986   if((n = TABLE_FIND(conf, struct conf, name, key)) < 0)
 987     return 0;
 988   return &conf[n];
 989 }
 990
 991 /** @brief Set a new configuration value */
 992 static int config_set(const struct config_state *cs,
 993                       int nvec, char **vec) {
 994   const struct conf *which;
 995
 996   D(("config_set %s", vec[0]));
 997   if(!(which = find(vec[0]))) {
 998     error(0, "%s:%d: unknown configuration key '%s'",
 999           cs->path, cs->line, vec[0]);
1000     return -1;
1001   }
1002   return (which->validate(cs, nvec - 1, vec + 1)
1003           || which->type->set(cs, which, nvec - 1, vec + 1));
1004 }
1005
1006 static int config_set_args(const struct config_state *cs,
1007                            const char *which, ...) {
1008   va_list ap;
1009   struct vector v[1];
1010   char *s;
1011
1012   vector_init(v);
1013   vector_append(v, (char *)which);
1014   va_start(ap, which);
1015   while((s = va_arg(ap, char *)))
1016     vector_append(v, s);
1017   va_end(ap);
1018   vector_terminate(v);
1019   return config_set(cs, v->nvec, v->vec);
1020 }
1021
1022 /** @brief Error callback used by config_include() */
1023 static void config_error(const char *msg, void *u) {
1024   const struct config_state *cs = u;
1025
1026   error(0, "%s:%d: %s", cs->path, cs->line, msg);
1027 }
1028
1029 /** @brief Include a file by name */
1030 static int config_include(struct config *c, const char *path) {
1031   FILE *fp;
1032   char *buffer, *inputbuffer, **vec;
1033   int n, ret = 0;
1034   struct config_state cs;
1035
1036   cs.path = path;
1037   cs.line = 0;
1038   cs.config = c;
1039   D(("%s: reading configuration", path));
1040   if(!(fp = fopen(path, "r"))) {
1041     error(errno, "error opening %s", path);
1042     return -1;
1043   }
1044   while(!inputline(path, fp, &inputbuffer, '\n')) {
1045     ++cs.line;
1046     if(!(buffer = mb2utf8(inputbuffer))) {
1047       error(errno, "%s:%d: cannot convert to UTF-8", cs.path, cs.line);
1048       ret = -1;
1049       xfree(inputbuffer);
1050       continue;
1051     }
1052     xfree(inputbuffer);
1053     if(!(vec = split(buffer, &n, SPLIT_COMMENTS|SPLIT_QUOTES,
1054                      config_error, &cs))) {
1055       ret = -1;
1056       xfree(buffer);
1057       continue;
1058     }
1059     if(n) {
1060       if(!strcmp(vec[0], "include")) {
1061         if(n != 2) {
1062           error(0, "%s:%d: must be 'include PATH'", cs.path, cs.line);
1063           ret = -1;
1064         } else
1065           config_include(c, vec[1]);
1066       } else
1067         ret |= config_set(&cs, n, vec);
1068     }
1069     for(n = 0; vec[n]; ++n) xfree(vec[n]);
1070     xfree(vec);
1071     xfree(buffer);
1072   }
1073   if(ferror(fp)) {
1074     error(errno, "error reading %s", path);
1075     ret = -1;
1076   }
1077   fclose(fp);
1078   return ret;
1079 }
1080
1081 static const char *const default_stopwords[] = {
1082   "stopword",
1083
1084   "01",
1085   "02",
1086   "03",
1087   "04",
1088   "05",
1089   "06",
1090   "07",
1091   "08",
1092   "09",
1093   "1",
1094   "10",
1095   "11",
1096   "12",
1097   "13",
1098   "14",
1099   "15",
1100   "16",
1101   "17",
1102   "18",
1103   "19",
1104   "2",
1105   "20",
1106   "21",
1107   "22",
1108   "23",
1109   "24",
1110   "25",
1111   "26",
1112   "27",
1113   "28",
1114   "29",
1115   "3",
1116   "30",
1117   "4",
1118   "5",
1119   "6",
1120   "7",
1121   "8",
1122   "9",
1123   "a",
1124   "am",
1125   "an",
1126   "and",
1127   "as",
1128   "for",
1129   "i",
1130   "im",
1131   "in",
1132   "is",
1133   "of",
1134   "on",
1135   "the",
1136   "to",
1137   "too",
1138   "we",
1139 };
1140 #define NDEFAULT_STOPWORDS (sizeof default_stopwords / sizeof *default_stopwords)
1141
1142 static const char *const default_players[] = {
1143   "*.ogg",
1144   "*.flac",
1145   "*.mp3",
1146   "*.wav",
1147 };
1148 #define NDEFAULT_PLAYERS (sizeof default_players / sizeof *default_players)
1149
1150 /** @brief Make a new default configuration */
1151 static struct config *config_default(void) {
1152   struct config *c = xmalloc(sizeof *c);
1153   const char *logname;
1154   struct passwd *pw;
1155   struct config_state cs;
1156   size_t n;
1157
1158   cs.path = "<internal>";
1159   cs.line = 0;
1160   cs.config = c;
1161   /* Strings had better be xstrdup'd as they will get freed at some point. */
1162   c->gap = 0;
1163   c->history = 60;
1164   c->home = xstrdup(pkgstatedir);
1165   if(!(pw = getpwuid(getuid())))
1166     fatal(0, "cannot determine our username");
1167   logname = pw->pw_name;
1168   c->username = xstrdup(logname);
1169   c->refresh = 15;
1170   c->prefsync = 3600;
1171   c->signal = SIGKILL;
1172   c->alias = xstrdup("{/artist}{/album}{/title}{ext}");
1173   c->lock = 1;
1174   c->device = xstrdup("default");
1175   c->nice_rescan = 10;
1176   c->speaker_command = 0;
1177   c->sample_format.bits = 16;
1178   c->sample_format.rate = 44100;
1179   c->sample_format.channels = 2;
1180   c->sample_format.endian = ENDIAN_NATIVE;
1181   c->queue_pad = 10;
1182   c->replay_min = 8 * 3600;
1183   c->api = -1;
1184   c->multicast_ttl = 1;
1185   c->multicast_loop = 1;
1186   c->authorization_algorithm = xstrdup("sha1");
1187   c->noticed_history = 31;
1188   c->short_display = 32;
1189   c->mixer = 0;
1190   c->channel = 0;
1191   c->dbversion = 2;
1192   c->cookie_login_lifetime = 86400;
1193   c->cookie_key_lifetime = 86400 * 7;
1194   c->smtp_server = xstrdup("127.0.0.1");
1195   c->new_max = 100;
1196   c->reminder_interval = 600;           /* 10m */
1197   /* Default stopwords */
1198   if(config_set(&cs, (int)NDEFAULT_STOPWORDS, (char **)default_stopwords))
1199     exit(1);
1200   /* Default player configuration */
1201   for(n = 0; n < NDEFAULT_PLAYERS; ++n) {
1202     if(config_set_args(&cs, "player",
1203                        default_players[n], "execraw", "disorder-decode", (char *)0))
1204       exit(1);
1205     if(config_set_args(&cs, "tracklength",
1206                        default_players[n], "disorder-tracklength", (char *)0))
1207       exit(1);
1208   }
1209   return c;
1210 }
1211
1212 static char *get_file(struct config *c, const char *name) {
1213   char *s;
1214
1215   byte_xasprintf(&s, "%s/%s", c->home, name);
1216   return s;
1217 }
1218
1219 /** @brief Set the default configuration file */
1220 static void set_configfile(void) {
1221   if(!configfile)
1222     byte_xasprintf(&configfile, "%s/config", pkgconfdir);
1223 }
1224
1225 /** @brief Free a configuration object */
1226 static void config_free(struct config *c) {
1227   int n;
1228
1229   if(c) {
1230     for(n = 0; n < (int)(sizeof conf / sizeof *conf); ++n)
1231       conf[n].type->free(c, &conf[n]);
1232     for(n = 0; n < c->nparts; ++n)
1233       xfree(c->parts[n]);
1234     xfree(c->parts);
1235     xfree(c);
1236   }
1237 }
1238
1239 /** @brief Set post-parse defaults */
1240 static void config_postdefaults(struct config *c,
1241                                 int server) {
1242   struct config_state cs;
1243   const struct conf *whoami;
1244   int n;
1245
1246   static const char *namepart[][4] = {
1247     { "title",  "/([0-9]+ *[-:] *)?([^/]+)\\.[a-zA-Z0-9]+$", "$2", "display" },
1248     { "title",  "/([^/]+)\\.[a-zA-Z0-9]+$",           "$1", "sort" },
1249     { "album",  "/([^/]+)/[^/]+$",                    "$1", "*" },
1250     { "artist", "/([^/]+)/[^/]+/[^/]+$",              "$1", "*" },
1251     { "ext",    "(\\.[a-zA-Z0-9]+)$",                 "$1", "*" },
1252   };
1253 #define NNAMEPART (int)(sizeof namepart / sizeof *namepart)
1254
1255   static const char *transform[][5] = {
1256     { "track", "^.*/([0-9]+ *[-:] *)?([^/]+)\\.[a-zA-Z0-9]+$", "$2", "display", "" },
1257     { "track", "^.*/([^/]+)\\.[a-zA-Z0-9]+$",           "$1", "sort", "" },
1258     { "dir",   "^.*/([^/]+)$",                          "$1", "*", "" },
1259     { "dir",   "^(the) ([^/]*)",                        "$2, $1", "sort", "i", },
1260     { "dir",   "[[:punct:]]",                           "", "sort", "g", }
1261   };
1262 #define NTRANSFORM (int)(sizeof transform / sizeof *transform)
1263
1264   cs.path = "<internal>";
1265   cs.line = 0;
1266   cs.config = c;
1267   if(!c->namepart.n) {
1268     whoami = find("namepart");
1269     for(n = 0; n < NNAMEPART; ++n)
1270       set_namepart(&cs, whoami, 4, (char **)namepart[n]);
1271   }
1272   if(!c->transform.n) {
1273     whoami = find("transform");
1274     for(n = 0; n < NTRANSFORM; ++n)
1275       set_transform(&cs, whoami, 5, (char **)transform[n]);
1276   }
1277   if(c->api == -1) {
1278     if(c->speaker_command)
1279       c->api = BACKEND_COMMAND;
1280     else if(c->broadcast.n)
1281       c->api = BACKEND_NETWORK;
1282     else {
1283 #if HAVE_ALSA_ASOUNDLIB_H
1284       c->api = BACKEND_ALSA;
1285 #elif HAVE_SYS_SOUNDCARD_H
1286       c->api = BACKEND_OSS;
1287 #elif HAVE_COREAUDIO_AUDIOHARDWARE_H
1288       c->api = BACKEND_COREAUDIO;
1289 #else
1290       c->api = BACKEND_COMMAND;
1291 #endif
1292     }
1293   }
1294   if(server) {
1295     if(c->api == BACKEND_COMMAND && !c->speaker_command)
1296       fatal(0, "'api command' but speaker_command is not set");
1297     if(c->api == BACKEND_NETWORK && !c->broadcast.n)
1298       fatal(0, "'api network' but broadcast is not set");
1299   }
1300   /* Override sample format */
1301   switch(c->api) {
1302   case BACKEND_NETWORK:
1303     c->sample_format.rate = 44100;
1304     c->sample_format.channels = 2;
1305     c->sample_format.bits = 16;
1306     c->sample_format.endian = ENDIAN_BIG;
1307     break;
1308   case BACKEND_COREAUDIO:
1309     c->sample_format.rate = 44100;
1310     c->sample_format.channels = 2;
1311     c->sample_format.bits = 16;
1312     c->sample_format.endian = ENDIAN_NATIVE;
1313     break;
1314   }
1315   if(!c->default_rights) {
1316     rights_type r = RIGHTS__MASK & ~(RIGHT_ADMIN|RIGHT_REGISTER
1317                                      |RIGHT_MOVE__MASK
1318                                      |RIGHT_SCRATCH__MASK
1319                                      |RIGHT_REMOVE__MASK);
1320     /* The idea is to approximate the meaning of the old 'restrict' directive
1321      * in the default rights if they are not overridden. */
1322     if(c->restrictions & RESTRICT_SCRATCH)
1323       r |= RIGHT_SCRATCH_MINE|RIGHT_SCRATCH_RANDOM;
1324     else
1325       r |= RIGHT_SCRATCH_ANY;
1326     if(!(c->restrictions & RESTRICT_MOVE))
1327       r |= RIGHT_MOVE_ANY;
1328     if(c->restrictions & RESTRICT_REMOVE)
1329       r |= RIGHT_REMOVE_MINE;
1330     else
1331       r |= RIGHT_REMOVE_ANY;
1332     c->default_rights = rights_string(r);
1333   }
1334 }
1335
1336 /** @brief (Re-)read the config file
1337  * @param server If set, do extra checking
1338  */
1339 int config_read(int server) {
1340   struct config *c;
1341   char *privconf;
1342   struct passwd *pw;
1343
1344   set_configfile();
1345   c = config_default();
1346   /* standalone Disobedience installs might not have a global config file */
1347   if(access(configfile, F_OK) == 0)
1348     if(config_include(c, configfile))
1349       return -1;
1350   /* if we can read the private config file, do */
1351   if((privconf = config_private())
1352      && access(privconf, R_OK) == 0
1353      && config_include(c, privconf))
1354     return -1;
1355   xfree(privconf);
1356   /* if there's a per-user system config file for this user, read it */
1357   if(config_per_user) {
1358     if(!(pw = getpwuid(getuid())))
1359       fatal(0, "cannot determine our username");
1360     if((privconf = config_usersysconf(pw))
1361        && access(privconf, F_OK) == 0
1362        && config_include(c, privconf))
1363       return -1;
1364     xfree(privconf);
1365     /* if we have a password file, read it */
1366     if((privconf = config_userconf(0, pw))
1367        && access(privconf, F_OK) == 0
1368        && config_include(c, privconf))
1369       return -1;
1370     xfree(privconf);
1371   }
1372   /* install default namepart and transform settings */
1373   config_postdefaults(c, server);
1374   /* everything is good so we shall use the new config */
1375   config_free(config);
1376   /* warn about obsolete directives */
1377   if(c->restrictions)
1378     error(0, "'restrict' will be removed in a future version");
1379   if(c->allow.n)
1380     error(0, "'allow' will be removed in a future version");
1381   if(c->trust.n)
1382     error(0, "'trust' will be removed in a future version");
1383   config = c;
1384   return 0;
1385 }
1386
1387 /** @brief Return the path to the private configuration file */
1388 char *config_private(void) {
1389   char *s;
1390
1391   set_configfile();
1392   byte_xasprintf(&s, "%s.private", configfile);
1393   return s;
1394 }
1395
1396 /** @brief Return the path to user's personal configuration file */
1397 char *config_userconf(const char *home, const struct passwd *pw) {
1398   char *s;
1399
1400   if(!home && !pw && !(pw = getpwuid(getuid())))
1401     fatal(0, "cannot determine our username");
1402   byte_xasprintf(&s, "%s/.disorder/passwd", home ? home : pw->pw_dir);
1403   return s;
1404 }
1405
1406 /** @brief Return the path to user-specific system configuration */
1407 char *config_usersysconf(const struct passwd *pw) {
1408   char *s;
1409
1410   set_configfile();
1411   if(!strchr(pw->pw_name, '/')) {
1412     byte_xasprintf(&s, "%s.%s", configfile, pw->pw_name);
1413     return s;
1414   } else
1415     return 0;
1416 }
1417
1418 char *config_get_file(const char *name) {
1419   return get_file(config, name);
1420 }
1421
1422 /*
1423 Local Variables:
1424 c-basic-offset:2
1425 comment-column:40
1426 fill-column:79
1427 End:
1428 */