2 * This file is part of DisOrder.
3 * Copyright (C) 2004, 2005, 2007-2009 Richard Kettlewell
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.
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.
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/>.
18 /** @file server/state.c
19 * @brief Global server state
21 #include "disorder-server.h"
23 /** @brief Current AF_UNIX socket path */
24 static const char *current_unix
;
26 /** @brief Current AF_UNIX socket */
27 static int current_unix_fd
;
29 /** @brief TCP listener definition */
31 /** @brief Next listener */
32 struct listener
*next
;
34 /** @brief Local socket address */
37 /** @brief File descriptor */
41 /** @brief Current listeners */
42 static struct listener
*listeners
;
44 /** @brief Current audio API */
45 const struct uaudio
*api
;
47 /** @brief Quit DisOrder */
48 void quit(ev_source
*ev
) {
49 info("shutting down...");
57 /** @brief Create a copy of an @c addrinfo structure */
58 static struct sockaddr
*copy_sockaddr(const struct addrinfo
*addr
) {
59 struct sockaddr
*sa
= xmalloc_noptr(addr
->ai_addrlen
);
60 memcpy(sa
, addr
->ai_addr
, addr
->ai_addrlen
);
64 /** @brief Create and destroy sockets to set current configuration */
65 static void reset_socket(ev_source
*ev
) {
67 struct addrinfo
*res
, *r
;
68 struct listener
*l
, **ll
;
69 struct sockaddr_un sun
;
72 new_unix
= config_get_file("socket");
73 if(!current_unix
|| strcmp(current_unix
, new_unix
)) {
74 /* either there was no socket, or there was but a different path */
76 /* stop the old one and remove it from the filesystem */
77 server_stop(ev
, current_unix_fd
);
78 if(unlink(current_unix
) < 0)
79 fatal(errno
, "unlink %s", current_unix
);
81 /* start the new one */
82 if(strlen(new_unix
) >= sizeof sun
.sun_path
)
83 fatal(0, "socket path %s is too long", new_unix
);
84 memset(&sun
, 0, sizeof sun
);
85 sun
.sun_family
= AF_UNIX
;
86 strcpy(sun
.sun_path
, new_unix
);
87 if(unlink(new_unix
) < 0 && errno
!= ENOENT
)
88 fatal(errno
, "unlink %s", new_unix
);
89 if((current_unix_fd
= server_start(ev
, PF_UNIX
, sizeof sun
,
90 (const struct sockaddr
*)&sun
,
92 current_unix
= new_unix
;
93 if(chmod(new_unix
, 0777) < 0)
94 fatal(errno
, "error calling chmod %s", new_unix
);
99 /* get the new listen config */
100 if(config
->listen
.af
!= -1)
101 res
= netaddress_resolve(&config
->listen
, 1, IPPROTO_TCP
);
105 /* Close any current listeners that aren't required any more */
108 for(r
= res
; r
; r
= r
->ai_next
)
109 if(!sockaddrcmp(r
->ai_addr
, l
->sa
))
112 /* Didn't find a match, remove this one */
113 server_stop(ev
, l
->fd
);
116 /* This address is still wanted */
121 /* Open any new listeners that are required */
122 for(r
= res
; r
; r
= r
->ai_next
) {
123 for(l
= listeners
; l
; l
= l
->next
)
124 if(!sockaddrcmp(r
->ai_addr
, l
->sa
))
127 /* Didn't find a match, need a new listener */
128 int fd
= server_start(ev
, r
->ai_family
, r
->ai_addrlen
, r
->ai_addr
,
129 format_sockaddr(r
->ai_addr
));
131 l
= xmalloc(sizeof *l
);
133 l
->sa
= copy_sockaddr(r
);
137 /* We ignore any failures (though server_start() will have
141 /* if res is still set it needs freeing */
146 /** @brief Reconfigure the server
147 * @param reload 0 at startup, 1 for a reload
149 int reconfigure(ev_source
*ev
, int reload
) {
150 int need_another_rescan
= 0;
153 D(("reconfigure(%d)", reload
));
154 /* Deconfigure the old audio API if there is one */
161 /* If there's a rescan in progress, cancel it but remember to start a fresh
162 * one after the reload */
163 need_another_rescan
= trackdb_rescan_cancel();
164 /* Close the track database */
166 /* (Re-)read the configuration */
167 if(config_read(1/*server*/))
170 /* Tell the speaker it needs to reload its config too. */
172 info("%s: installed new configuration", configfile
);
174 /* Re-open track database. We don't attempt to support database version
175 * upgrade at this point - the software hasn't changed, after all. */
176 trackdb_open(TRACKDB_NO_UPGRADE
);
178 /* We only allow for upgrade at startup */
179 trackdb_open(TRACKDB_CAN_UPGRADE
);
181 api
= uaudio_find(config
->api
);
186 /* If we interrupted a rescan of all the tracks, start a new one */
187 if(need_another_rescan
)
188 trackdb_rescan(ev
, 1/*check*/, 0, 0);
189 /* Arrange timeouts for schedule actions */
191 /* TODO what about leftover callbacks from before the reload? */
193 /* Read the queue back in */
199 /* TODO we need a careful think about what you can and cannot change with a
202 * For instance saving and restoring the queue limits what we can usefuly
203 * keep in the queue data structure. As a general rule, long-term state
204 * ought to be off-limits. So 'home directory' will have to stay where it
205 * is. (This actually means the AF_UNIX socket will never be re-opened.)
207 * Players certainly ought to be reconfigurable but this raises the ugly
208 * question of what to do about already-started background decoders.
210 * The audio API is easy to do for the server but a pain for the speaker.
212 * These two points suggest a general approach: if things that affect the
213 * speaker change, we could just restart it and any extant background
214 * decoders, at the next track change. This would generate a bit of a gap
215 * but presumably reconfiguration is a rare event so this might be