X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/disorder/blobdiff_plain/1c95530676f55d612383883ff383e24ecc7dc17d..1ddfe26cfb76aac9286cc62ad1e677ad44659758:/server/state.c

diff --git a/server/state.c b/server/state.c
index cfcca1c..b125417 100644
--- a/server/state.c
+++ b/server/state.c
@@ -20,36 +20,69 @@
  */
 #include "disorder-server.h"
 
+/** @brief Current AF_UNIX socket path */
 static const char *current_unix;
+
+/** @brief Current AF_UNIX socket */
 static int current_unix_fd;
 
-static struct addrinfo *current_listen_addrinfo;
-static int current_listen_fd;
+/** @brief TCP listener definition */
+struct listener {
+  /** @brief Next listener */
+  struct listener *next;
+
+  /** @brief Local socket address */
+  struct sockaddr *sa;
+
+  /** @brief File descriptor */
+  int fd;
+};
+
+/** @brief Current listeners */
+static struct listener *listeners;
 
 /** @brief Current audio API */
 const struct uaudio *api;
 
+/** @brief Quit DisOrder */
 void quit(ev_source *ev) {
-  info("shutting down...");
+  disorder_info("shutting down...");
   quitting(ev);
   trackdb_close();
-  trackdb_deinit();
-  info("exiting");
+  trackdb_deinit(ev);
+  /* Shutdown subprocesses.
+   *
+   * Subprocesses that use ev_child:
+   * - the speaker
+   * - the current rescan
+   * - any decoders
+   * - ...and players
+   * - the track picker
+   * - mail sender
+   * - the deadlock manager
+   *
+   * Subprocesses that don't:
+   * - any normalizers
+   * These are not shut down currently.
+   */
+  ev_child_killall(ev);
+  disorder_info("exiting");
   exit(0);
 }
 
-static void reset_socket(ev_source *ev) {
+/** @brief Create a copy of an @c addrinfo structure */
+static struct sockaddr *copy_sockaddr(const struct addrinfo *addr) {
+  struct sockaddr *sa = xmalloc_noptr(addr->ai_addrlen);
+  memcpy(sa, addr->ai_addr, addr->ai_addrlen);
+  return sa;
+}
+
+/** @brief Create and destroy sockets to set current configuration */
+void reset_sockets(ev_source *ev) {
   const char *new_unix;
-  struct addrinfo *res;
+  struct addrinfo *res, *r;
+  struct listener *l, **ll;
   struct sockaddr_un sun;
-  char *name;
-  
-  static const struct addrinfo pref = {
-    .ai_flags = AI_PASSIVE,
-    .ai_family = PF_INET,
-    .ai_socktype = SOCK_STREAM,
-    .ai_protocol = IPPROTO_TCP,
-  };
 
   /* unix first */
   new_unix = config_get_file("socket");
@@ -59,50 +92,66 @@ static void reset_socket(ev_source *ev) {
       /* stop the old one and remove it from the filesystem */
       server_stop(ev, current_unix_fd);
       if(unlink(current_unix) < 0)
-	fatal(errno, "unlink %s", current_unix);
+	disorder_fatal(errno, "unlink %s", current_unix);
     }
     /* start the new one */
     if(strlen(new_unix) >= sizeof sun.sun_path)
-      fatal(0, "socket path %s is too long", new_unix);
+      disorder_fatal(0, "socket path %s is too long", new_unix);
     memset(&sun, 0, sizeof sun);
     sun.sun_family = AF_UNIX;
     strcpy(sun.sun_path, new_unix);
     if(unlink(new_unix) < 0 && errno != ENOENT)
-      fatal(errno, "unlink %s", new_unix);
+      disorder_fatal(errno, "unlink %s", new_unix);
     if((current_unix_fd = server_start(ev, PF_UNIX, sizeof sun,
 				       (const struct sockaddr *)&sun,
 				       new_unix)) >= 0) {
       current_unix = new_unix;
       if(chmod(new_unix, 0777) < 0)
-	fatal(errno, "error calling chmod %s", new_unix);
+	disorder_fatal(errno, "error calling chmod %s", new_unix);
     } else
       current_unix = 0;
   }
 
   /* get the new listen config */
-  if(config->listen.n)
-    res = get_address(&config->listen, &pref, &name);
+  if(config->listen.af != -1)
+    res = netaddress_resolve(&config->listen, 1, IPPROTO_TCP);
   else
     res = 0;
 
-  if((res && !current_listen_addrinfo)
-     || (current_listen_addrinfo
-	 && (!res
-	     || addrinfocmp(res, current_listen_addrinfo)))) {
-    /* something has to change */
-    if(current_listen_addrinfo) {
-      /* delete the old listener */
-      server_stop(ev, current_listen_fd);
-      freeaddrinfo(current_listen_addrinfo);
-      current_listen_addrinfo = 0;
+  /* Close any current listeners that aren't required any more */
+  ll = &listeners;
+  while((l = *ll)) {
+    for(r = res; r; r = r->ai_next)
+      if(!sockaddrcmp(r->ai_addr, l->sa))
+	break;
+    if(!r) {
+      /* Didn't find a match, remove this one */
+      server_stop(ev, l->fd);
+      *ll = l->next;
+    } else {
+      /* This address is still wanted */
+      ll = &l->next;
     }
-    if(res) {
-      /* start the new listener */
-      if((current_listen_fd = server_start(ev, res->ai_family, res->ai_addrlen,
-					   res->ai_addr, name)) >= 0) {
-	current_listen_addrinfo = res;
-	res = 0;
+  }
+
+  /* Open any new listeners that are required */
+  for(r = res; r; r = r->ai_next) {
+    for(l = listeners; l; l = l->next)
+      if(!sockaddrcmp(r->ai_addr, l->sa))
+	break;
+    if(!l) {
+      /* Didn't find a match, need a new listener */
+      int fd = server_start(ev, r->ai_family, r->ai_addrlen, r->ai_addr,
+			    format_sockaddr(r->ai_addr));
+      if(fd >= 0) {
+	l = xmalloc(sizeof *l);
+	l->next = listeners;
+	l->sa = copy_sockaddr(r);
+	l->fd = fd;
+	listeners = l;
       }
+      /* We ignore any failures (though server_start() will have
+       * logged them). */
     }
   }
   /* if res is still set it needs freeing */
@@ -110,43 +159,47 @@ static void reset_socket(ev_source *ev) {
     freeaddrinfo(res);
 }
 
-int reconfigure(ev_source *ev, int reload) {
+/** @brief Reconfigure the server
+ * @param ev Event loop
+ * @param flags Flags
+ * @return As config_read(); 0 on success, -1 if could not (re-)read config
+ */
+int reconfigure(ev_source *ev, unsigned flags) {
   int need_another_rescan = 0;
   int ret = 0;
 
-  D(("reconfigure(%d)", reload));
+  D(("reconfigure(%x)", flags));
+  /* Deconfigure the old audio API if there is one */
   if(api) {
     if(api->close_mixer)
       api->close_mixer();
     api = NULL;
   }
-  if(reload) {
+  if(flags & RECONFIGURE_RELOADING) {
+    /* If there's a rescan in progress, cancel it but remember to start a fresh
+     * one after the reload. */
     need_another_rescan = trackdb_rescan_cancel();
-    trackdb_close();
-    if(config_read(1))
+    /* (Re-)read the configuration */
+    if(config_read(1/*server*/, config))
       ret = -1;
     else {
       /* Tell the speaker it needs to reload its config too. */
       speaker_reload();
-      info("%s: installed new configuration", configfile);
+      disorder_info("%s: installed new configuration", configfile);
     }
-    trackdb_open(TRACKDB_NO_UPGRADE);
-  } else
-    /* We only allow for upgrade at startup */
-    trackdb_open(TRACKDB_CAN_UPGRADE);
+  }
+  /* New audio API */
   api = uaudio_find(config->api);
   if(api->configure)
     api->configure();
   if(api->open_mixer)
     api->open_mixer();
+  /* If we interrupted a rescan of all the tracks, start a new one */
   if(need_another_rescan)
     trackdb_rescan(ev, 1/*check*/, 0, 0);
-  /* Arrange timeouts for schedule actions */
-  schedule_init(ev);
-  if(!ret) {
-    queue_read();
-    recent_read();
-    reset_socket(ev);
+  if(!ret && !(flags & RECONFIGURE_FIRST)) {
+    /* Open/close sockets */
+    reset_sockets(ev);
   }
   return ret;
 }
@@ -155,5 +208,7 @@ int reconfigure(ev_source *ev, int reload) {
 Local Variables:
 c-basic-offset:2
 comment-column:40
+fill-column:79
+indent-tabs-mode:nil
 End:
 */