start plugin infrastructure

src/Makefile.am

@@ -49,7 +49,7 @@ mtd_update_SOURCES = mtd-update.c conf.c conf.h ll.c ll.h \
 	db-sql.c db-sql.h db-generic.c db-generic.h smart-parser.c \
 	smart-parser.h err.c err.h os-unix.c os.h xml-rpc.c xml-rpc.h \
 	restart.c restart.h uici.c uici.h ssc.c ssc.h \
-	webserver.c webserver.h compat.c compat.h \
+	webserver.c webserver.h compat.c compat.h plugin.c plugin.h \
 	$(PRENDSRC) $(ORENDSRC) $(HRENDSRC) \
 	$(SQLITEDB) $(SQLITE3DB)
 
@@ -64,7 +64,7 @@ mt_daapd_SOURCES = main.c daapd.h rend.h uici.c uici.h webserver.c \
 	scan-xml.c scan-wma.c scan-aac.c scan-aac.h scan-wav.c scan-url.c \
 	smart-parser.c smart-parser.h xml-rpc.c xml-rpc.h \
 	os.h ll.c ll.h conf.c conf.h compat.c compat.h \
-	os-unix.h os-unix.c os.h \
+	os-unix.h os-unix.c os.h plugin.c plugin.h \
 	$(PRENDSRC) $(ORENDSRC) $(HRENDSRC) $(OGGVORBISSRC) $(FLACSRC) \
 	$(MUSEPACKSRC) $(SQLITEDB) $(SQLITE3DB) $(SQLDB) $(GDBM)
 

src/conf.c

@@ -113,6 +113,8 @@ static CONF_ELEMENTS conf_elements[] = {
     { 0, 0, CONF_T_STRING,"general","password" },
     { 0, 0, CONF_T_MULTICOMMA,"general","compdirs" },
     { 0, 0, CONF_T_STRING,"general","logfile" },
+    { 0, 0, CONF_T_EXISTPATH,"plugins","plugin_dir" },
+    { 0, 0, CONF_T_MULTICOMMA,"plugins","plugins" },
     { 0, 0, CONF_T_INT, NULL, NULL }
 };
 

src/err.c

@@ -60,7 +60,7 @@ static unsigned int err_debugmask=0xFFFFFFFF; /**< modules to debug, see \ref lo
 /** text list of modules to match for setting debug mask */
 static char *err_categorylist[] = {
     "config","webserver","database","scan","query","index","browse",
-    "playlist","art","daap","main","rend","xml","parse",NULL
+    "playlist","art","daap","main","rend","xml","parse","plugin",NULL
 };
 
 /*

src/err.h

@@ -56,6 +56,7 @@
 #define L_REND    0x00000800 /**< rendezvous -- rend-unix.c, rend-posix.c, etc */
 #define L_XML     0x00001000 /**< xml - xml-rpc.c */
 #define L_PARSE   0x00002000 /**< smart playlist parser */
+#define L_PLUG    0x00004000 /**< plugins */
 #define L_MISC    0x80000000 /**< anything else */
 
 #ifndef TRUE

src/main.c

@@ -81,6 +81,7 @@
 #include "dynamic-art.h"
 #include "db-generic.h"
 #include "os.h"
+#include "plugin.h"
 
 #ifdef HAVE_GETOPT_H
 # include "getopt.h"
@@ -188,9 +189,14 @@ int main(int argc, char *argv[]) {
     char *logfile,*db_type,*db_parms,*web_root,*runas;
     char **mp3_dir_array;
     char *servername,*iface;
+    int index;
 
     char txtrecord[255];
-    
+
+    char *plugindir;
+    char plugin[PATH_MAX];
+    char **pluginarray;
+
     int err;
     char *perr=NULL;
 
@@ -296,6 +302,26 @@ int main(int argc, char *argv[]) {
         }
     }
 
+    /* load plugins before we drop privs?  Maybe... let the 
+     * plugins do stuff they might need to */
+    if((plugindir=conf_alloc_string("plugins","plugin_dir",NULL)) != NULL) {
+        if(conf_get_array("plugins","plugins",&pluginarray)==TRUE) {
+            index = 0;
+            while(pluginarray[index]) {
+                sprintf(plugin,"%s/%s",plugindir,pluginarray[index]);
+                if(plugin_load(&perr,plugin) != PLUGIN_E_SUCCESS) {
+                    DPRINTF(E_LOG,L_MAIN,"Error loading plugin %s: %s\n",
+                            plugin, perr);
+                    free(perr);
+                    perr = NULL;
+                }
+                index++;
+            }
+        } else {
+            free(plugindir);
+        }
+    }
+
     runas = conf_alloc_string("general","runas","nobody");
 
 #ifndef WITHOUT_MDNS

src/os-unix.c

@@ -23,6 +23,7 @@
 # include "config.h"
 #endif
 
+#include <dlfcn.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <grp.h>
@@ -420,3 +421,22 @@ int _os_start_signal_handler(pthread_t *handler_tid) {
     _os_pidfile = file;
  }
 
+
+
+/**
+ * load a shared library
+ *
+ * @param
+ */
+void *os_loadlib(char *path) {
+    return dlopen(path,RTLD_LAZY);
+}
+
+void *os_libfunc(void *handle, char *function) {
+    return dlsym(handle,function);
+}
+
+int *os_unload(void *handle) {
+    return dlclose(handle);
+}
+

src/os.h

@@ -33,6 +33,11 @@ extern int os_closesyslog(void);
 extern int os_syslog(int level, char *msg);
 extern int os_chown(char *path, char *user);
 
+/* library loading functions */
+extern void *os_loadlib(char *path);
+extern void *os_libfunc(void *handle, char *function);
+extern void *os_unload(void *handle);
+
 #ifdef WIN32
 # include "os-win32.h"
 #else