mdw@git.distorted.org.uk Git - disorder/blob - server/disorder-server.h

   1 /*
   2  * This file is part of DisOrder
   3  * Copyright (C) 2008 Richard Kettlewell
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  18  * USA
  19  */
  20
  21 #ifndef DISORDER_SERVER_H
  22 #define DISORDER_SERVER_H
  23
  24 #include "common.h"
  25
  26 #include <db.h>
  27 #include <errno.h>
  28 #include <fcntl.h>
  29 #include <fnmatch.h>
  30 #include <gcrypt.h>
  31 #include <getopt.h>
  32 #include <grp.h>
  33 #include <locale.h>
  34 #include <netinet/in.h>
  35 #include <pcre.h>
  36 #include <pwd.h>
  37 #include <signal.h>
  38 #include <stddef.h>
  39 #include <sys/socket.h>
  40 #include <sys/stat.h>
  41 #include <sys/time.h>
  42 #include <sys/types.h>
  43 #include <sys/un.h>
  44 #include <syslog.h>
  45 #include <time.h>
  46 #include <unistd.h>
  47
  48 #include "addr.h"
  49 #include "authhash.h"
  50 #include "base64.h"
  51 #include "cache.h"
  52 #include "charset.h"
  53 #include "configuration.h"
  54 #include "cookies.h"
  55 #include "defs.h"
  56 #include "disorder.h"
  57 #include "event.h"
  58 #include "eventlog.h"
  59 #include "eventlog.h"
  60 #include "hash.h"
  61 #include "hex.h"
  62 #include "inputline.h"
  63 #include "kvp.h"
  64 #include "log.h"
  65 #include "logfd.h"
  66 #include "mem.h"
  67 #include "mime.h"
  68 #include "mixer.h"
  69 #include "printf.h"
  70 #include "queue.h"
  71 #include "random.h"
  72 #include "rights.h"
  73 #include "sendmail.h"
  74 #include "sink.h"
  75 #include "speaker-protocol.h"
  76 #include "split.h"
  77 #include "syscalls.h"
  78 #include "table.h"
  79 #include "trackdb-int.h"
  80 #include "trackdb.h"
  81 #include "trackname.h"
  82 #include "unicode.h"
  83 #include "user.h"
  84 #include "vector.h"
  85 #include "version.h"
  86 #include "wstat.h"
  87
  88 void daemonize(const char *tag, int fac, const char *pidfile);
  89 /* Go into background.  Send stdout/stderr to syslog.
  90  * If @pri@ is non-null, it should be "facility.level"
  91  * If @tag@ is non-null, it is used as a tag to each message
  92  * If @pidfile@ is non-null, the PID is written to that file.
  93  */
  94
  95 void quit(ev_source *ev) attribute((noreturn));
  96 /* terminate the daemon */
  97
  98 int reconfigure(ev_source *ev, int reload);
  99 /* reconfigure.  If @reload@ is nonzero, update the configuration. */
 100
 101 extern struct queue_entry qhead;
 102 /* queue of things yet to be played.  the head will be played
 103  * soonest. */
 104
 105 extern struct queue_entry phead;
 106 /* things that have been played in the past.  the head is the oldest. */
 107
 108 extern long pcount;
 109
 110 void queue_read(void);
 111 /* read the queue in.  Calls @fatal@ on error. */
 112
 113 void queue_write(void);
 114 /* write the queue out.  Calls @fatal@ on error. */
 115
 116 void recent_read(void);
 117 /* read the recently played list in.  Calls @fatal@ on error. */
 118
 119 void recent_write(void);
 120 /* write the recently played list out.  Calls @fatal@ on error. */
 121
 122 struct queue_entry *queue_add(const char *track, const char *submitter,
 123                               int where);
 124 #define WHERE_START 0                   /* Add to head of queue */
 125 #define WHERE_END 1                     /* Add to end of queue */
 126 #define WHERE_BEFORE_RANDOM 2           /* End, or before random track */
 127 /* add an entry to the queue.  Return a pointer to the new entry. */
 128
 129 void queue_remove(struct queue_entry *q, const char *who);
 130 /* remove an from the queue */
 131
 132 struct queue_entry *queue_find(const char *key);
 133 /* find a track in the queue by name or ID */
 134
 135 void queue_played(struct queue_entry *q);
 136 /* add @q@ to the played list */
 137
 138 int queue_move(struct queue_entry *q, int delta, const char *who);
 139 /* move element @q@ in the queue towards the front (@delta@ > 0) or towards the
 140  * back (@delta@ < 0).  The return value is the leftover delta once we've hit
 141  * the end in whichever direction we were going. */
 142
 143 void queue_moveafter(struct queue_entry *target,
 144                      int nqs, struct queue_entry **qs, const char *who);
 145 /* Move all the elements QS to just after TARGET, or to the head if
 146  * TARGET=0. */
 147
 148 void queue_fix_sofar(struct queue_entry *q);
 149 /* Fix up the sofar field for standalone players */
 150
 151 void schedule_init(ev_source *ev);
 152 const char *schedule_add(ev_source *ev,
 153                          struct kvp *actiondata);
 154 int schedule_del(const char *id);
 155 struct kvp *schedule_get(const char *id);
 156 char **schedule_list(int *neventsp);
 157
 158 extern struct queue_entry *playing;     /* playing track or 0 */
 159 extern int paused;                      /* non-0 if paused */
 160
 161 void play(ev_source *ev);
 162 /* try to play something, if playing is enabled and nothing is playing
 163  * already */
 164
 165 int playing_is_enabled(void);
 166 /* return true iff playing is enabled */
 167
 168 void enable_playing(const char *who, ev_source *ev);
 169 /* enable playing */
 170
 171 void disable_playing(const char *who);
 172 /* disable playing. */
 173
 174 int random_is_enabled(void);
 175 /* return true iff random play is enabled */
 176
 177 void enable_random(const char *who, ev_source *ev);
 178 /* enable random play */
 179
 180 void disable_random(const char *who);
 181 /* disable random play */
 182
 183 void scratch(const char *who, const char *id);
 184 /* scratch the playing track.  @who@ identifies the scratcher. @id@ is
 185  * the ID or a null pointer. */
 186
 187 void quitting(ev_source *ev);
 188 /* called to terminate current track and shut down speaker process
 189  * when quitting */
 190
 191 void speaker_setup(ev_source *ev);
 192 /* set up the speaker subprocess */
 193
 194 void speaker_reload(void);
 195 /* Tell the speaker process to reload its configuration. */
 196
 197 int pause_playing(const char *who);
 198 /* Pause the current track.  Return 0 on success, -1 on error.  WHO
 199  * can be 0. */
 200
 201 void resume_playing(const char *who);
 202 /* Resume after a pause.  WHO can be 0. */
 203
 204 int prepare(ev_source *ev,
 205             struct queue_entry *q);
 206 /* Prepare to play Q */
 207
 208 void abandon(ev_source *ev,
 209              struct queue_entry *q);
 210 /* Abandon a possibly-prepared track. */
 211
 212 void add_random_track(ev_source *ev);
 213 /* If random play is enabled then try to add a track to the queue. */
 214
 215 int server_start(ev_source *ev, int pf,
 216                  size_t socklen, const struct sockaddr *sa,
 217                  const char *name);
 218 /* start listening.  Return the fd. */
 219
 220 int server_stop(ev_source *ev, int fd);
 221 /* Stop listening on @fd@ */
 222
 223 extern int volume_left, volume_right;   /* last known volume */
 224
 225 extern int wideopen;                    /* blindly accept all logins */
 226
 227 /* plugins */
 228
 229 struct plugin;
 230
 231 typedef void *plugin_handle;
 232 typedef void function_t(void);
 233
 234 const struct plugin *open_plugin(const char *name,
 235                                  unsigned flags);
 236 #define PLUGIN_FATAL 0x0001             /* fatal() on error */
 237 /* Open a plugin.  Returns a null pointer on error or a handle to it
 238  * on success. */
 239
 240 function_t *get_plugin_function(const struct plugin *handle,
 241                                 const char *symbol);
 242 const void *get_plugin_object(const struct plugin *handle,
 243                               const char *symbol);
 244 /* Look up a function or an object in a plugin */
 245
 246 /* track length computation ***************************************************/
 247
 248 long tracklength(const char *plugin, const char *track, const char *path);
 249
 250 /* collection interface *******************************************************/
 251
 252 void scan(const char *module, const char *root);
 253 /* write a list of path names below @root@ to standard output. */
 254
 255 int check(const char *module, const char *root, const char *path);
 256 /* Recheck a track, given its root and path name.  Return 1 if it
 257  * exists, 0 if it does not exist and -1 if an error occurred. */
 258
 259 /* notification interface *****************************************************/
 260
 261 void notify_play(const char *track,
 262                  const char *submitter);
 263 /* we're going to play @track@.  It was submitted by @submitter@
 264  * (might be a null pointer) */
 265
 266 void notify_scratch(const char *track,
 267                     const char *submitter,
 268                     const char *scratcher,
 269                     int seconds);
 270 /* @scratcher@ scratched @track@ after @seconds@.  It was submitted by
 271  * @submitter@ (might be a null pointer) */
 272
 273 void notify_not_scratched(const char *track,
 274                           const char *submitter);
 275 /* @track@ (submitted by @submitter@, which might be a null pointer)
 276  * was not scratched. */
 277
 278 void notify_queue(const char *track,
 279                   const char *submitter);
 280 /* @track@ was queued by @submitter@ */
 281
 282 void notify_queue_remove(const char *track,
 283                          const char *remover);
 284 /* @track@ removed from the queue by @remover@ (never a null pointer) */
 285
 286 void notify_queue_move(const char *track,
 287                        const char *mover);
 288 /* @track@ moved in the queue by @mover@ (never a null pointer) */
 289
 290 void notify_pause(const char *track,
 291                   const char *pauser);
 292 /* TRACK was paused by PAUSER (might be a null pointer) */
 293
 294 void notify_resume(const char *track,
 295                    const char *resumer);
 296 /* TRACK was resumed by PAUSER (might be a null pointer) */
 297
 298 /* track playing **************************************************************/
 299
 300 unsigned long play_get_type(const struct plugin *pl);
 301 /* Get the type word for this plugin */
 302
 303 void *play_prefork(const struct plugin *pl,
 304                    const char *track);
 305 /* Call the prefork function for PL and return the user data */
 306
 307 void play_track(const struct plugin *pl,
 308                 const char *const *parameters,
 309                 int nparameters,
 310                 const char *path,
 311                 const char *track);
 312 /* play a track.  Called inside a fork. */
 313
 314 void play_cleanup(const struct plugin *pl, void *data);
 315 /* Call the cleanup function for PL if necessary */
 316
 317 int play_pause(const struct plugin *pl, long *playedp, void *data);
 318 /* Pause track. */
 319
 320 void play_resume(const struct plugin *pl, void *data);
 321 /* Resume track. */
 322
 323 #endif /* DISORDER_SERVER_H */
 324
 325 /*
 326 Local Variables:
 327 c-basic-offset:2
 328 comment-column:40
 329 fill-column:79
 330 indent-tabs-mode:nil
 331 End:
 332 */