merge per-mount on-[dis]connect script handling

svn path=/icecast/trunk/icecast/; revision=9424

conf/icecast.xml.in

@@ -105,6 +105,8 @@
                 <option name="filename" value="myauth"/>
                 <option name="allow_duplicate_users" value="0"/>
         </authentication>
+        <on-connect>/home/icecast/bin/stream-start</on-connect>
+        <on-disconnect>/home/icecast/bin/stream-stop</on-disconnect>
     </mount>
     -->
 

doc/icecast2_config_file.html

@@ -380,7 +380,8 @@ If you are relaying a Shoutcast stream, you need to specify this indicator to al
                 <option name="filename" value="myauth"/>
                 <option name="allow_duplicate_users" value="0"/>
         </authentication>
-
+        <on-connect>/home/icecast/bin/source-start</on-connect>
+        <on-disconnect>/home/icecast/bin/source-end</on-disconnect>
     </mount>
 </pre>
 <p>This section contains the settings which apply only to a specific mountpoint and applies to
@@ -524,6 +525,20 @@ relay to be shown
 <div class="indentedbox">
 This specifies that the named mount point will require listener authentication.  Currently, we only support a file-based authentication scheme (type=htpasswd).  Users and encrypted password are placed in this file (separated by a :) and all requests for this mountpoint will require that a user and password be supplied for authentication purposes.  These values are passed in via normal HTTP Basic Authentication means (i.e. http://user:password@stream:port/mountpoint.ogg).  Users and Passwords are maintained via the web admin interface.  A mountpoint configured with an authenticator will display a red key next to the mount point name on the admin screens.  You can read more about listener authentication <a href="icecast2_listenerauth.html">here</a>.
 </div>
+<h4>on-connect</h4>
+<div class="indentedbox">
+    <p>State a program that is run when the source is started. It is passed a parameter which
+    is the name of the mountpoint that is starting. The processing of the stream does not wait
+    for the script to end. This option is not available on win32
+    </p>
+</div>
+<h4>on-disconnect</h4>
+<div class="indentedbox">
+    <p>State a program that is run when the source ends. It is passed a parameter which is the
+    name of the mountpoint that has ended. The processing of the stream does not wait for the
+    script to end. This option is not available on win32
+    </p>
+</div>
 <p>
 <br />
 <br />

src/cfgfile.c

@@ -191,6 +191,8 @@ void config_clear(ice_config_t *c)
         xmlFree(mount->password);
         xmlFree(mount->dumpfile);
         xmlFree(mount->intro_filename);
+        xmlFree(mount->on_connect);
+        xmlFree(mount->on_disconnect);
         xmlFree(mount->fallback_mount);
         xmlFree(mount->stream_name);
         xmlFree(mount->stream_description);
@@ -633,6 +635,14 @@ static void _parse_mount(xmlDocPtr doc, xmlNodePtr node,
                 option = option->next;
             }
         }
+        else if (strcmp(node->name, "on-connect") == 0) {
+            mount->on_connect = (char *)xmlNodeListGetString(
+                    doc, node->xmlChildrenNode, 1);
+        }
+        else if (strcmp(node->name, "on-disconnect") == 0) {
+            mount->on_disconnect = (char *)xmlNodeListGetString(
+                    doc, node->xmlChildrenNode, 1);
+        }
         else if (strcmp(node->name, "queue-size") == 0) {
             tmp = (char *)xmlNodeListGetString(doc, node->xmlChildrenNode, 1);
             mount->queue_size_limit = atoi (tmp);

src/cfgfile.h

@@ -65,6 +65,8 @@ typedef struct _mount_proxy {
     char *auth_type; /* Authentication type */
     char *cluster_password;
     config_options_t *auth_options; /* Options for this type */
+    char *on_connect;
+    char *on_disconnect;
 
     char *stream_name;
     char *stream_description;

src/sighandler.c

@@ -41,6 +41,7 @@ void sighandler_initialize(void)
     signal(SIGINT, _sig_die);
     signal(SIGTERM, _sig_die);
     signal(SIGPIPE, SIG_IGN);
+    signal(SIGCHLD, SIG_IGN);
 #endif
 }
 

src/source.c

@@ -26,6 +26,7 @@
 #include <unistd.h>
 #include <sys/time.h>
 #include <sys/socket.h>
+#include <sys/wait.h>
 #else
 #include <winsock2.h>
 #include <windows.h>
@@ -62,6 +63,11 @@ static int _compare_clients(void *compare_arg, void *a, void *b);
 static int _free_client(void *key);
 static void _parse_audio_info (source_t *source, const char *s);
 static void source_shutdown (source_t *source);
+#ifdef _WIN32
+#define source_run_script(x,y)  WARN0("on [dis]connect scripts disabled");
+#else
+static void source_run_script (char *command, char *mountpoint);
+#endif
 
 /* Allocate a new source with the stated mountpoint, if one already
  * exists with that mountpoint in the global source tree then return
@@ -534,6 +540,7 @@ static void source_init (source_t *source)
     ice_config_t *config = config_get_config();
     char *listenurl, *str;
     int listen_url_size;
+    mount_proxy *mountinfo;
 
     /* 6 for max size of port */
     listen_url_size = strlen("http://") + strlen(config->hostname) +
@@ -584,6 +591,11 @@ static void source_init (source_t *source)
     source->last_read = time (NULL);
     source->running = 1;
 
+    mountinfo = config_find_mount (config_get_config(), source->mount);
+    if (mountinfo && mountinfo->on_connect)
+        source_run_script (mountinfo->on_connect, source->mount);
+    config_release_config();
+
     /*
     ** Now, if we have a fallback source and override is on, we want
     ** to steal its clients, because it means we've come back online
@@ -769,9 +781,16 @@ void source_main (source_t *source)
 
 static void source_shutdown (source_t *source)
 {
+    mount_proxy *mountinfo;
+
     source->running = 0;
     INFO1("Source \"%s\" exiting", source->mount);
 
+    mountinfo = config_find_mount (config_get_config(), source->mount);
+    if (mountinfo && mountinfo->on_disconnect)
+        source_run_script (mountinfo->on_disconnect, source->mount);
+    config_release_config();
+
     /* we have de-activated the source now, so no more clients will be
      * added, now move the listeners we have to the fallback (if any)
      */
@@ -1089,6 +1108,10 @@ void source_update_settings (ice_config_t *config, source_t *source, mount_proxy
         DEBUG1 ("intro file is %s", mountinfo->intro_filename);
     if (source->dumpfilename)
         DEBUG1 ("Dumping stream to %s", source->dumpfilename);
+    if (mountinfo && mountinfo->on_connect)
+        DEBUG1 ("connect script \"%s\"", mountinfo->on_connect);
+    if (mountinfo && mountinfo->on_disconnect)
+        DEBUG1 ("disconnect script \"%s\"", mountinfo->on_disconnect);
     if (source->on_demand)
     {
         DEBUG0 ("on_demand set");
@@ -1156,6 +1179,41 @@ void *source_client_thread (void *arg)
 }
 
 
+#ifndef _WIN32
+static void source_run_script (char *command, char *mountpoint)
+{
+    pid_t pid, external_pid;
+
+    /* do a fork twice so that the command has init as parent */
+    external_pid = fork();
+    switch (external_pid)
+    {
+        case 0:
+            switch (pid = fork ())
+            {
+                case -1:
+                    ERROR2 ("Unable to fork %s (%s)", command, strerror (errno));
+                    break;
+                case 0:  /* child */
+                    DEBUG1 ("Starting command %s", command);
+                    execl (command, command, mountpoint, NULL);
+                    ERROR2 ("Unable to run command %s (%s)", command, strerror (errno));
+                    exit(0);
+                default: /* parent */
+                    break;
+            }
+            exit (0);
+        case -1:
+            ERROR1 ("Unable to fork %s", strerror (errno));
+            break;
+        default: /* parent */
+            waitpid (external_pid, NULL, 0);
+            break;
+    }
+}
+#endif
+
+
 /* rescan the mount list, so that xsl files are updated to show
  * unconnected but active fallback mountpoints
  */