LocalSocketImpl.cpp: Set O_CLOEXEC on received FDs

Set O_CLOEXEC on received file descriptors. This prevents FD leakage
across an exec boundary. Please see the description of O_CLOEXEC in "man
2 open" for the reasons why this is useful.

Test: Device boots and no observed errors.
Change-Id: Id0d9c9d71efb25dacb26d5d98d93fc3b72c1b6ae

parent 1e814b39

core/jni/android_net_LocalSocketImpl.cpp

+1 −3

Original line number	Diff line number	Diff line
		@@ -202,9 +202,7 @@ static ssize_t socket_read_all(JNIEnv *env, jobject thisJ, int fd,
		msg.msg_control = cmsgbuf;
		msg.msg_controllen = sizeof(cmsgbuf);

		do {
		ret = recvmsg(fd, &msg, MSG_NOSIGNAL);
		} while (ret < 0 && errno == EINTR);
		ret = TEMP_FAILURE_RETRY(recvmsg(fd, &msg, MSG_NOSIGNAL \| MSG_CMSG_CLOEXEC));

		if (ret < 0 && errno == EPIPE) {
		// Treat this as an end of stream