now winix can demonize itself

parameter in the config: demonize (default: true)
 


git-svn-id: svn://ttmath.org/publicrep/winix/trunk@669 e52654a7-88a9-db11-a3e9-0013d4bc506e

core/app.cpp

@@ -927,3 +927,33 @@ bool App::DropPrivileges()
 return true;
 }
 
+
+
+bool App::Demonize()
+{
+	// in linux fork() should be used twice
+
+	int pid = fork();
+	
+	if( pid == -1 )
+	{
+		log << log1 << "App: I can't demonize myself (fork problem)" << logend << logsave;
+		return false;
+	}
+		
+	if( pid != 0 )
+	{
+		// parent
+		exit(0);
+	}
+
+	// child
+	if( setsid() == -1 )
+	{
+		log << log1 << "App: I can't demonize myself (setsid problem)" << logend << logsave;
+		return false;
+	}
+	
+return true;
+}
+

core/app.h

@@ -52,7 +52,7 @@ public:
 	void Close();
 	bool DropPrivileges();
 	void LogUserGroups();
-
+	bool Demonize();
 
 	// configuration read from a config file
 	Config config;

core/config.cpp

@@ -89,6 +89,8 @@ bool Config::ReadConfig(bool errors_to_stdout_, bool stdout_is_closed)
 
 void Config::AssignValues(bool stdout_is_closed)
 {
+	demonize = Bool("demonize", true);
+
 	user  = Text("user");
 	group = Text("group");
 	additional_groups = Bool("additional_groups", true);

core/config.h

@@ -21,9 +21,14 @@ class Config
 {
 public:
 
-	// name of the config file (full path can be)
+	// name of the config file
+	// this is the parameter passed to winix programm
 	std::string config_file;
 
+	// start as a demon (in the background)
+	// default: true
+	bool demonize;
+
 	// system user name (to which drop privileges)
 	// used only if winix is started as the root
 	std::string user;
@@ -47,6 +52,8 @@ public:
 	int log_level;
 
 	// logging to stdout too
+	// only if demonize is 'false'
+	// default: false
 	bool log_stdout;
 
 	// how many requests should be logged in the same time

main/main.cpp

@@ -68,7 +68,7 @@ int main(int argv, char ** argc)
 	if( !app.config.ReadConfig(true, false) ) /* errors to stdout, stdout in not closed */
 		return 2;
 
-	if( app.stdout_is_closed )
+	if( app.stdout_is_closed || app.config.demonize )
 		app.config.log_stdout = false;
 
 	// closing descriptors only at the beginning
@@ -90,6 +90,9 @@ int main(int argv, char ** argc)
 
 	app.LogUserGroups();
 
+	if( app.config.demonize && !app.Demonize() )
+		return 4;
+
 	// app.config.base_server can be changed (stripped from 'http://' or a last slash)
 	// it is done when the config is read
 	log << log3 << "base_server: " << app.config.base_server << logend;