From: Hwankyu Jhun <h.jhun@samsung.com>
Date: Thu, 19 Apr 2018 10:45:32 +0000 (+0900)
Subject: Prepare a server socket of an application
X-Git-Tag: accepted/tizen/unified/20180423.130939~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0f4adc399c9796a7acd5d3dbab3ed9002b199563;p=platform%2Fcore%2Fappfw%2Flaunchpad.git

Prepare a server socket of an application

Before executing an application, the child process creates an
aul socket of the application for communication. And then, the
application uses the socket.

Requires:
 - https://review.tizen.org/gerrit/#/c/176470/
 - https://review.tizen.org/gerrit/#/c/176471/

Change-Id: I082608844f8b7fae5bd04aa9c6df3064b429273c
Signed-off-by: Hwankyu Jhun <h.jhun@samsung.com>
---

diff --git a/inc/launchpad_common.h b/inc/launchpad_common.h
index 102fa5a..d0a33b2 100644
--- a/inc/launchpad_common.h
+++ b/inc/launchpad_common.h
@@ -126,6 +126,7 @@ void _get_cpu_idle(unsigned long long *total, unsigned long long *idle);
 int _setup_stdio(const char *ident);
 int _set_priority(int prio);
 int _wait_tep_mount(bundle *b);
+void _prepare_app_socket(void);
 
 #endif /* __LAUNCHPAD_COMMON_H__ */
 
diff --git a/src/launchpad.c b/src/launchpad.c
index ae0def3..6f81c77 100755
--- a/src/launchpad.c
+++ b/src/launchpad.c
@@ -854,6 +854,8 @@ static int __prepare_exec(const char *appid, const char *app_path,
 	if (ret < 0)
 		return PAD_ERR_FAILED;
 
+	_prepare_app_socket();
+
 	return 0;
 }
 
diff --git a/src/launchpad_common.c b/src/launchpad_common.c
index f2272b5..8cefb4c 100644
--- a/src/launchpad_common.c
+++ b/src/launchpad_common.c
@@ -819,13 +819,21 @@ int _close_all_fds(void)
 	struct dirent *dentry = NULL;
 	int fd;
 	int max_fd;
+	int aul_fd = -1;
+	const char *aul_listen_fd;
+
+	aul_listen_fd = getenv("AUL_LISTEN_FD");
+	if (aul_listen_fd)
+		aul_fd = atoi(aul_listen_fd);
 
 	dp = opendir("/proc/self/fd");
 	if (dp == NULL) {
 		/* fallback */
 		max_fd = sysconf(_SC_OPEN_MAX);
-		for (fd = 3; fd < max_fd; fd++)
-			close(fd);
+		for (fd = 3; fd < max_fd; fd++) {
+			if (fd != aul_fd)
+				close(fd);
+		}
 
 		return 0;
 	}
@@ -838,7 +846,7 @@ int _close_all_fds(void)
 		if (fd < 3)
 			continue;
 
-		if (fd == dirfd(dp))
+		if (fd == dirfd(dp) || fd == aul_fd)
 			continue;
 
 		close(fd);
@@ -1015,3 +1023,76 @@ int _wait_tep_mount(bundle *b)
 	_I("Mount has been done.");
 	return 0;
 }
+
+static int __create_app_socket(int pid, uid_t uid)
+{
+	int fd;
+	char path[PATH_MAX];
+	struct sockaddr_un addr = {
+		.sun_family = AF_UNIX,
+	};
+
+	fd = socket(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK, 0);
+	if (fd < 0) {
+		if (errno == EINVAL) {
+			fd = socket(AF_UNIX, SOCK_STREAM, 0);
+			if (fd < 0) {
+				_E("Second chance - socket create errno(%d)",
+						errno);
+				return -1;
+			}
+		} else {
+			_E("Failed to create socket. errno(%d)", errno);
+			return -1;
+		}
+	}
+
+	snprintf(path, sizeof(path), "/run/aul/apps/%u/%d", uid, pid);
+	if (mkdir(path, 0700) != 0) {
+		if (errno == EEXIST) {
+			if (access(path, R_OK) != 0) {
+				_E("Failed to access %s. errno(%d)",
+						path, errno);
+				close(fd);
+				return -1;
+			}
+		} else {
+			_E("Failed to access %s. errno(%d)", path, errno);
+			close(fd);
+			return -1;
+		}
+	}
+
+	snprintf(addr.sun_path, sizeof(addr.sun_path),
+			"/run/aul/apps/%u/%d/.app-sock", uid, pid);
+	unlink(addr.sun_path);
+
+	if (bind(fd, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
+		_E("Failed to bind socket(%d), errno(%d)", fd, errno);
+		close(fd);
+		return -1;
+	}
+
+	_set_sock_option(fd, 0);
+
+	if (listen(fd, 128) < 0) {
+		_E("Failed to listen %d, errno(%d)", fd, errno);
+		close(fd);
+		return -1;
+	}
+
+	return fd;
+}
+
+void _prepare_app_socket(void)
+{
+	int fd;
+	char buf[12];
+
+	fd = __create_app_socket(getpid(), getuid());
+	if (fd < 0)
+		return;
+
+	snprintf(buf, sizeof(buf), "%d", fd);
+	setenv("AUL_LISTEN_FD", buf, 1);
+}
diff --git a/src/launchpad_lib.c b/src/launchpad_lib.c
index b7a910f..60f6dac 100644
--- a/src/launchpad_lib.c
+++ b/src/launchpad_lib.c
@@ -135,6 +135,8 @@ static int __prepare_exec(const char *appid, const char *app_path,
 	if (ret < 0)
 		return -1;
 
+	_prepare_app_socket();
+
 	return 0;
 }