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 3 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,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU 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, see <http://www.gnu.org/licenses/>.
  17  */
  18 /** @file server/disorder-server.h
  19  * @brief Definitions for server and allied utilities
  20  */
  21
  22 #ifndef DISORDER_SERVER_H
  23 #define DISORDER_SERVER_H
  24
  25 #include "common.h"
  26
  27 #include <db.h>
  28 #include <errno.h>
  29 #include <fcntl.h>
  30 #include <fnmatch.h>
  31 #include <gcrypt.h>
  32 #include <getopt.h>
  33 #include <grp.h>
  34 #include <locale.h>
  35 #include <netinet/in.h>
  36 #include <pcre.h>
  37 #include <pwd.h>
  38 #include <signal.h>
  39 #include <stddef.h>
  40 #include <sys/socket.h>
  41 #include <sys/stat.h>
  42 #include <sys/time.h>
  43 #include <sys/types.h>
  44 #include <sys/un.h>
  45 #include <syslog.h>
  46 #include <time.h>
  47 #include <unistd.h>
  48
  49 #include "addr.h"
  50 #include "authhash.h"
  51 #include "base64.h"
  52 #include "cache.h"
  53 #include "charset.h"
  54 #include "configuration.h"
  55 #include "cookies.h"
  56 #include "defs.h"
  57 #include "disorder.h"
  58 #include "event.h"
  59 #include "eventlog.h"
  60 #include "eventlog.h"
  61 #include "hash.h"
  62 #include "hex.h"
  63 #include "inputline.h"
  64 #include "kvp.h"
  65 #include "log.h"
  66 #include "logfd.h"
  67 #include "mem.h"
  68 #include "mime.h"
  69 #include "mixer.h"
  70 #include "printf.h"
  71 #include "queue.h"
  72 #include "random.h"
  73 #include "rights.h"
  74 #include "sendmail.h"
  75 #include "sink.h"
  76 #include "speaker-protocol.h"
  77 #include "split.h"
  78 #include "syscalls.h"
  79 #include "table.h"
  80 #include "trackdb-int.h"
  81 #include "trackdb.h"
  82 #include "trackname.h"
  83 #include "unicode.h"
  84 #include "user.h"
  85 #include "vector.h"
  86 #include "version.h"
  87 #include "wstat.h"
  88
  89 void daemonize(const char *tag, int fac, const char *pidfile);
  90 /* Go into background.  Send stdout/stderr to syslog.
  91  * If @pri@ is non-null, it should be "facility.level"
  92  * If @tag@ is non-null, it is used as a tag to each message
  93  * If @pidfile@ is non-null, the PID is written to that file.
  94  */
  95
  96 void quit(ev_source *ev) attribute((noreturn));
  97 /* terminate the daemon */
  98
  99 int reconfigure(ev_source *ev, int reload);
 100 /* reconfigure.  If @reload@ is nonzero, update the configuration. */
 101
 102 extern struct queue_entry qhead;
 103 /* queue of things yet to be played.  the head will be played
 104  * soonest. */
 105
 106 extern struct queue_entry phead;
 107 /* things that have been played in the past.  the head is the oldest. */
 108
 109 extern long pcount;
 110
 111 void queue_read(void);
 112 /* read the queue in.  Calls @fatal@ on error. */
 113
 114 void queue_write(void);
 115 /* write the queue out.  Calls @fatal@ on error. */
 116
 117 void recent_read(void);
 118 /* read the recently played list in.  Calls @fatal@ on error. */
 119
 120 void recent_write(void);
 121 /* write the recently played list out.  Calls @fatal@ on error. */
 122
 123 struct queue_entry *queue_add(const char *track, const char *submitter,
 124                               int where, enum track_origin origin);
 125 #define WHERE_START 0                   /* Add to head of queue */
 126 #define WHERE_END 1                     /* Add to end of queue */
 127 #define WHERE_BEFORE_RANDOM 2           /* End, or before random track */
 128 /* add an entry to the queue.  Return a pointer to the new entry. */
 129
 130 void queue_remove(struct queue_entry *q, const char *who);
 131 /* remove an from the queue */
 132
 133 struct queue_entry *queue_find(const char *key);
 134 /* find a track in the queue by name or ID */
 135
 136 void queue_played(struct queue_entry *q);
 137 /* add @q@ to the played list */
 138
 139 int queue_move(struct queue_entry *q, int delta, const char *who);
 140 /* move element @q@ in the queue towards the front (@delta@ > 0) or towards the
 141  * back (@delta@ < 0).  The return value is the leftover delta once we've hit
 142  * the end in whichever direction we were going. */
 143
 144 void queue_moveafter(struct queue_entry *target,
 145                      int nqs, struct queue_entry **qs, const char *who);
 146 /* Move all the elements QS to just after TARGET, or to the head if
 147  * TARGET=0. */
 148
 149 void queue_fix_sofar(struct queue_entry *q);
 150 /* Fix up the sofar field for standalone players */
 151
 152 void schedule_init(ev_source *ev);
 153 const char *schedule_add(ev_source *ev,
 154                          struct kvp *actiondata);
 155 int schedule_del(const char *id);
 156 struct kvp *schedule_get(const char *id);
 157 char **schedule_list(int *neventsp);
 158
 159 extern struct queue_entry *playing;     /* playing track or 0 */
 160 extern int paused;                      /* non-0 if paused */
 161
 162 void play(ev_source *ev);
 163 /* try to play something, if playing is enabled and nothing is playing
 164  * already */
 165
 166 int playing_is_enabled(void);
 167 /* return true iff playing is enabled */
 168
 169 void enable_playing(const char *who, ev_source *ev);
 170 /* enable playing */
 171
 172 void disable_playing(const char *who);
 173 /* disable playing. */
 174
 175 int random_is_enabled(void);
 176 /* return true iff random play is enabled */
 177
 178 void enable_random(const char *who, ev_source *ev);
 179 /* enable random play */
 180
 181 void disable_random(const char *who);
 182 /* disable random play */
 183
 184 void scratch(const char *who, const char *id);
 185 /* scratch the playing track.  @who@ identifies the scratcher. @id@ is
 186  * the ID or a null pointer. */
 187
 188 void quitting(ev_source *ev);
 189 /* called to terminate current track and shut down speaker process
 190  * when quitting */
 191
 192 void speaker_setup(ev_source *ev);
 193 /* set up the speaker subprocess */
 194
 195 void speaker_reload(void);
 196 /* Tell the speaker process to reload its configuration. */
 197
 198 int pause_playing(const char *who);
 199 /* Pause the current track.  Return 0 on success, -1 on error.  WHO
 200  * can be 0. */
 201
 202 void resume_playing(const char *who);
 203 /* Resume after a pause.  WHO can be 0. */
 204
 205 int prepare(ev_source *ev,
 206             struct queue_entry *q);
 207 /* Prepare to play Q */
 208
 209 void abandon(ev_source *ev,
 210              struct queue_entry *q);
 211 /* Abandon a possibly-prepared track. */
 212
 213 void add_random_track(ev_source *ev);
 214 /* If random play is enabled then try to add a track to the queue. */
 215
 216 int server_start(ev_source *ev, int pf,
 217                  size_t socklen, const struct sockaddr *sa,
 218                  const char *name);
 219 /* start listening.  Return the fd. */
 220
 221 int server_stop(ev_source *ev, int fd);
 222 /* Stop listening on @fd@ */
 223
 224 extern int volume_left, volume_right;   /* last known volume */
 225
 226 extern int wideopen;                    /* blindly accept all logins */
 227
 228 /* plugins */
 229
 230 struct plugin;
 231
 232 typedef void *plugin_handle;
 233 typedef void function_t(void);
 234
 235 const struct plugin *open_plugin(const char *name,
 236                                  unsigned flags);
 237 #define PLUGIN_FATAL 0x0001             /* fatal() on error */
 238 /* Open a plugin.  Returns a null pointer on error or a handle to it
 239  * on success. */
 240
 241 function_t *get_plugin_function(const struct plugin *handle,
 242                                 const char *symbol);
 243 const void *get_plugin_object(const struct plugin *handle,
 244                               const char *symbol);
 245 /* Look up a function or an object in a plugin */
 246
 247 /* track length computation ***************************************************/
 248
 249 long tracklength(const char *plugin, const char *track, const char *path);
 250
 251 /* collection interface *******************************************************/
 252
 253 void scan(const char *module, const char *root);
 254 /* write a list of path names below @root@ to standard output. */
 255
 256 int check(const char *module, const char *root, const char *path);
 257 /* Recheck a track, given its root and path name.  Return 1 if it
 258  * exists, 0 if it does not exist and -1 if an error occurred. */
 259
 260 /* notification interface *****************************************************/
 261
 262 void notify_play(const char *track,
 263                  const char *submitter);
 264 /* we're going to play @track@.  It was submitted by @submitter@
 265  * (might be a null pointer) */
 266
 267 void notify_scratch(const char *track,
 268                     const char *submitter,
 269                     const char *scratcher,
 270                     int seconds);
 271 /* @scratcher@ scratched @track@ after @seconds@.  It was submitted by
 272  * @submitter@ (might be a null pointer) */
 273
 274 void notify_not_scratched(const char *track,
 275                           const char *submitter);
 276 /* @track@ (submitted by @submitter@, which might be a null pointer)
 277  * was not scratched. */
 278
 279 void notify_queue(const char *track,
 280                   const char *submitter);
 281 /* @track@ was queued by @submitter@ */
 282
 283 void notify_queue_remove(const char *track,
 284                          const char *remover);
 285 /* @track@ removed from the queue by @remover@ (never a null pointer) */
 286
 287 void notify_queue_move(const char *track,
 288                        const char *mover);
 289 /* @track@ moved in the queue by @mover@ (never a null pointer) */
 290
 291 void notify_pause(const char *track,
 292                   const char *pauser);
 293 /* TRACK was paused by PAUSER (might be a null pointer) */
 294
 295 void notify_resume(const char *track,
 296                    const char *resumer);
 297 /* TRACK was resumed by PAUSER (might be a null pointer) */
 298
 299 /* track playing **************************************************************/
 300
 301 unsigned long play_get_type(const struct plugin *pl);
 302 /* Get the type word for this plugin */
 303
 304 void *play_prefork(const struct plugin *pl,
 305                    const char *track);
 306 /* Call the prefork function for PL and return the user data */
 307
 308 void play_track(const struct plugin *pl,
 309                 const char *const *parameters,
 310                 int nparameters,
 311                 const char *path,
 312                 const char *track);
 313 /* play a track.  Called inside a fork. */
 314
 315 void play_cleanup(const struct plugin *pl, void *data);
 316 /* Call the cleanup function for PL if necessary */
 317
 318 int play_pause(const struct plugin *pl, long *playedp, void *data);
 319 /* Pause track. */
 320
 321 void play_resume(const struct plugin *pl, void *data);
 322 /* Resume track. */
 323
 324 #endif /* DISORDER_SERVER_H */
 325
 326 /*
 327 Local Variables:
 328 c-basic-offset:2
 329 comment-column:40
 330 fill-column:79
 331 indent-tabs-mode:nil
 332 End:
 333 */