Allow daemon mode

src/common/capwap.c

@@ -160,3 +160,41 @@ void* capwap_clone(void* buffer, int buffersize) {
 
 	return memcpy(bufferclone, buffer, buffersize);
 }
+
+/* */
+void capwap_daemon(void) {
+	int fd;
+	pid_t pid;
+
+	/* Fork off the parent process */
+	pid = fork();
+	if (pid < 0) {
+		capwap_exit(CAPWAP_DAEMON_ERROR);
+	} else if (pid > 0) {
+		capwap_exit(CAPWAP_SUCCESSFUL);
+	}
+
+	/* Change the file mode mask */
+	umask(0);
+
+	/* Create a new SID for the child process */
+	if (setsid() < 0) {
+		capwap_exit(CAPWAP_DAEMON_ERROR);
+	}
+
+	/* Change the current working directory */
+	if ((chdir("/")) < 0) {
+		capwap_exit(CAPWAP_DAEMON_ERROR);
+	}
+
+	/* Redirect the standard file descriptors to /dev/null */
+	fd = open("/dev/null", 0);
+	if (fd == -1) {
+		capwap_exit(CAPWAP_DAEMON_ERROR);
+	}
+
+	dup2(fd, STDIN_FILENO);
+	dup2(fd, STDOUT_FILENO);
+	dup2(fd, STDERR_FILENO);
+	close(fd);
+}

src/common/capwap.h

@@ -12,9 +12,12 @@
 #include <poll.h>
 #include <sys/types.h>
 #include <sys/socket.h>
+#include <sys/ioctl.h>
 #include <netdb.h>
 #include <sys/time.h>
 #include <net/if.h>
+#include <sys/stat.h>
+#include <fcntl.h>
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
@@ -92,6 +95,9 @@ void capwap_killall_timeout(struct timeout_control* timeout);
 int capwap_is_enable_timeout(struct timeout_control* timeout, unsigned long index);
 int capwap_is_timeout(struct timeout_control* timeout, unsigned long index);
 
+/* */
+void capwap_daemon(void);
+
 /* */
 #define capwap_outofmemory()						capwap_logging_fatal("Out of memory %s(%d)", __FILE__, __LINE__);	\
 													capwap_exit(CAPWAP_OUT_OF_MEMORY);

src/common/capwap_error.h

@@ -6,5 +6,6 @@
 #define CAPWAP_OUT_OF_MEMORY				-2
 #define CAPWAP_REQUEST_ROOT					-3
 #define CAPWAP_CRYPT_ERROR					-4
+#define CAPWAP_DAEMON_ERROR					-5
 
 #endif /* __CAPWAP_ERROR_HEADER__*/

src/common/capwap_logging.c

@@ -81,6 +81,20 @@ void capwap_logging_enable_console(int error) {
 #endif
 }
 
+/* */
+void capwap_logging_disable_console(void) {
+#ifdef CAPWAP_MULTITHREADING_ENABLE
+	capwap_lock_enter(&l_loglock);
+#endif
+
+	loggingoutputstdout = 0;
+	loggingoutputstderr = 0;
+
+#ifdef CAPWAP_MULTITHREADING_ENABLE
+	capwap_lock_exit(&l_loglock);
+#endif
+}
+
 /* */
 #ifdef ENABLE_LOGGING
 void capwap_logging_printf(int level, const char* format, ...) {

src/common/capwap_logging.h

@@ -19,6 +19,7 @@ void capwap_logging_verboselevel(unsigned int level);
 /* */
 void capwap_logging_disable_allinterface();
 void capwap_logging_enable_console(int error);
+void capwap_logging_disable_console(void);
 
 /* */
 #ifdef ENABLE_LOGGING