support daemon

@@ -19,13 +19,17 @@ chunk_size          60000;
 # default: ./objs/logs
 ff_log_dir          ./objs/logs;
 # the log file for srs.
-# if not specified, disable log to file, only print to console.
+# if not specified or empty, disable log to file, only print to console.
 # if speicfied, write log to file and print to console.
+# default: empty.
 srs_log_file        ./objs/srs.log;
 # the max connections.
 # if exceed the max connections, server will drop the new connection.
 # default: 2000
 max_connections     1000;
+# whether start as deamon
+# default: on
+daemon              on;
 # vhost list, the __defaultVhost__ is the default vhost
 # for example, user use ip to access the stream: rtmp://192.168.1.2/live/livestream.
 # for which cannot identify the required vhost.

@@ -71,11 +71,10 @@ start() {
     srs_log_file=`cat ${ROOT}/${CONFIG} |grep '^srs_log_file'| awk '{print $2}'| awk -F ';' '{print $1}'`
     
     # TODO: FIXME: set limit by, for instance, "ulimit -HSn 10000"
-    # TODO: FIXME: support deamon, without nohup.
     if [[ -z $srs_log_file ]]; then
-        (cd ${ROOT}; nohup ${APP} -c ${CONFIG} >/dev/null 2>&1 &)
+        (cd ${ROOT}; ${APP} -c ${CONFIG} >/dev/null 2>&1)
     else
-        (cd ${ROOT}; nohup ${APP} -c ${CONFIG} >> $srs_log_file 2>&1 &)
+        (cd ${ROOT}; ${APP} -c ${CONFIG} >> $srs_log_file 2>&1)
     fi
     
     # check again after start server

@@ -1282,6 +1282,18 @@ string SrsConfig::get_srs_log_file()
     return conf->arg0();
 }
 
+bool SrsConfig::get_deamon()
+{
+    srs_assert(root);
+    
+    SrsConfDirective* conf = root->get("deamon");
+    if (conf && conf->arg0() == "off") {
+        return false;
+    }
+    
+    return true;
+}
+
 int SrsConfig::get_max_connections()
 {
     srs_assert(root);

@@ -149,6 +149,7 @@ public:
     virtual std::string         get_engine_output(SrsConfDirective* engine);
     virtual std::string         get_ffmpeg_log_dir();
     virtual std::string         get_srs_log_file();
+    virtual bool                get_deamon();
     virtual int                 get_max_connections();
     virtual bool                get_gop_cache(std::string vhost);
     virtual double              get_queue_length(std::string vhost);

@@ -37,6 +37,9 @@ SrsServer* _srs_server = new SrsServer();
 #include <stdlib.h>
 #include <signal.h>
 
+#include <sys/types.h>
+#include <sys/wait.h>
+
 #ifdef SRS_GPERF_MP
     #include <gperftools/heap-profiler.h>
 #endif
@@ -50,37 +53,13 @@ void handler(int signo)
     _srs_server->on_signal(signo);
 }
 
-int main(int argc, char** argv) 
+int run_master() 
 {
     int ret = ERROR_SUCCESS;
     
-    // TODO: support both little and big endian.
-    srs_assert(srs_is_little_endian());
-
-#ifdef SRS_GPERF_MP
-    HeapProfilerStart("gperf.srs.gmp");
-#endif
-#ifdef SRS_GPERF_CP
-    ProfilerStart("gperf.srs.gcp");
-#endif
-    
     signal(SIGNAL_RELOAD, handler);
     signal(SIGTERM, handler);
     signal(SIGINT, handler);
-    
-    if ((ret = _srs_config->parse_options(argc, argv)) != ERROR_SUCCESS) {
-        return ret;
-    }
-
-#ifdef SRS_GPERF_MC
-    #ifdef SRS_GPERF_MP
-    srs_error("option --with-gmc confict with --with-gmp, "
-        "@see: http://google-perftools.googlecode.com/svn/trunk/doc/heap_checker.html\n"
-        "Note that since the heap-checker uses the heap-profiling framework internally, "
-        "it is not possible to run both the heap-checker and heap profiler at the same time");
-    return -1;
-    #endif
-#endif
 
     srs_trace("uname: "SRS_UNAME);
     srs_trace("build: %s, %s", SRS_BUILD_DATE, srs_is_little_endian()? "little-endian":"big-endian");
@@ -106,3 +85,81 @@ int main(int argc, char** argv)
     
     return 0;
 }
+
+int run() 
+{
+    // if not deamon, directly run master.
+    if (!_srs_config->get_deamon()) {
+        return run_master();
+    }
+    
+    srs_trace("start deamon mode...");
+    
+    int pid = fork();
+    
+    if(pid == -1){
+        srs_error("create process error. ret=-1"); //ret=0
+        return -1;
+    }
+
+    // grandpa
+    if(pid > 0){
+        int status = 0;
+        if(waitpid(pid, &status, 0) == -1){
+            srs_error("wait child process error! ret=-1"); //ret=0
+        }
+        srs_trace("grandpa process exit.");
+        exit(0);
+        return 0;
+    }
+
+    // father
+    pid = fork();
+    
+    if(pid == -1){
+        srs_error("create process error. ret=-1");
+        return -1;
+    }
+
+    if(pid > 0){
+        srs_trace("father process exit. ret=-1");
+        exit(0);
+        return 0;
+    }
+
+    // son
+    srs_trace("son(deamon) process running.");
+    
+    return run_master();
+}
+
+int main(int argc, char** argv) 
+{
+    int ret = ERROR_SUCCESS;
+    
+    // TODO: support both little and big endian.
+    srs_assert(srs_is_little_endian());
+
+#ifdef SRS_GPERF_MP
+    HeapProfilerStart("gperf.srs.gmp");
+#endif
+#ifdef SRS_GPERF_CP
+    ProfilerStart("gperf.srs.gcp");
+#endif
+
+#ifdef SRS_GPERF_MC
+    #ifdef SRS_GPERF_MP
+    srs_error("option --with-gmc confict with --with-gmp, "
+        "@see: http://google-perftools.googlecode.com/svn/trunk/doc/heap_checker.html\n"
+        "Note that since the heap-checker uses the heap-profiling framework internally, "
+        "it is not possible to run both the heap-checker and heap profiler at the same time");
+    return -1;
+    #endif
+#endif
+    
+    if ((ret = _srs_config->parse_options(argc, argv)) != ERROR_SUCCESS) {
+        return ret;
+    }
+    
+    return run();
+}