Use a file descriptor passed by the launchpad

While calling the aul_initialize(), the application can get
the aul listen socketfd by using getenv(). The launchpad sets the
environment variable about the aul listen socketfd before
executing an application.

Requires:
 - https://review.tizen.org/gerrit/#/c/176470/
 - https://review.tizen.org/gerrit/#/c/176467/

Change-Id: Ifaaacc9bea9275e2bb25a5d9fc902a0681f5baa6
Signed-off-by: Hwankyu Jhun <h.jhun@samsung.com>

4 files changed, 43 insertions, 6 deletions

diff --git a/include/aul.h b/include/aul.h
index 1a1350e9..41ac9449 100644
--- a/include/aul.h
+++ b/include/aul.h
@@ -3073,6 +3073,7 @@ int aul_ignore_app_status(status_listen_h handle);
  * This API is only for Appfw internally.
  */
 int aul_notify_exit(void);
+int aul_notify_start(void);
 
 #ifdef __cplusplus
 	}
diff --git a/include/aul_cmd.h b/include/aul_cmd.h
index 7a944fa4..17162b6c 100755
--- a/include/aul_cmd.h
+++ b/include/aul_cmd.h
@@ -133,6 +133,7 @@ enum app_cmd {
 	RPC_PORT_CREATE_SOCKET_PAIR = 101,
 	RPC_PORT_NOTIFY_RPC_FINISHED = 102,
 	COMPLICATION_UPDATE_REQUEST = 103,
+	APP_NOTIFY_START = 104,
 
 	APP_CMD_MAX
 };
diff --git a/src/launch.c b/src/launch.c
index 867f8cca..f52abf91 100755
--- a/src/launch.c
+++ b/src/launch.c
@@ -23,6 +23,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <dirent.h>
+#include <ctype.h>
 #include <glib.h>
 #include <gio/gio.h>
 #include <ttrace.h>
@@ -576,17 +577,42 @@ int aul_register_init_callback(
 	return 0;
 }
 
+static int __get_preinit_fd(void)
+{
+	int fd = -1;
+	const char *listen_fd;
+
+	listen_fd = getenv("AUL_LISTEN_FD");
+	if (listen_fd) {
+		if (isdigit(*listen_fd))
+			fd = atoi(listen_fd);
+		unsetenv("AUL_LISTEN_FD");
+	}
+
+	return fd;
+}
+
 int aul_initialize()
 {
+	int flag;
+
 	if (aul_initialized)
 		return AUL_R_ECANCELED;
 
-
-	aul_fd = aul_sock_create_server(getpid(), getuid());
-	if (aul_fd < 0) {
-		_E("aul_init create sock failed");
-		return AUL_R_ECOMM;
+	aul_fd = __get_preinit_fd();
+	if (aul_fd > 0 && aul_fd < sysconf(_SC_OPEN_MAX)) {
+		flag = fcntl(aul_fd, F_GETFD);
+		flag |= FD_CLOEXEC;
+		(void)fcntl(aul_fd, F_SETFD, flag);
+	} else {
+		_W("Failed to get preinit fd");
+		aul_fd = aul_sock_create_server(getpid(), getuid());
+		if (aul_fd < 0) {
+			_E("aul_init create sock failed");
+			return AUL_R_ECOMM;
+		}
 	}
+	aul_notify_start();
 
 	aul_initialized = 1;
 
diff --git a/src/status.c b/src/status.c
index 2e30634b..ed9d2c02 100644
--- a/src/status.c
+++ b/src/status.c
@@ -376,4 +376,13 @@ API int aul_notify_exit(void)
 {
 	return aul_sock_send_raw(AUL_UTIL_PID, getuid(),
 			APP_NOTIFY_EXIT, NULL, 0, AUL_SOCK_NOREPLY);
-}
\ No newline at end of file
+}
+
+API int aul_notify_start(void)
+{
+	int r;
+
+	r = aul_sock_send_raw(AUL_UTIL_PID, getuid(),
+			APP_NOTIFY_START, NULL, 0, AUL_SOCK_NOREPLY);
+	return r;
+}