SmartAudio/package/system/procd/patches/007-procd-selinux-enabled.patch

--- a/CMakeLists.txt	2017-11-27 20:08:14.961623274 +0800
+++ b/CMakeLists.txt	2017-11-27 15:13:34.564869828 +0800
@@ -45,6 +45,10 @@
   add_subdirectory(upgraded)
 ENDIF()

+IF(SELINUX_ENABLED)
+  ADD_DEFINITIONS(-DSELINUX_ENABLED)
+ENDIF()
+
 ADD_EXECUTABLE(procd ${SOURCES})
 TARGET_LINK_LIBRARIES(procd ${LIBS})
 INSTALL(TARGETS procd
--- a/initd/init.c	2018-02-09 09:50:41.744091527 +0800
+++ b/initd/init.c	2018-02-09 09:52:41.000000000 +0800
@@ -29,6 +29,13 @@
 #include <unistd.h>
 #include <stdio.h>

+#if SELINUX_ENABLED
+#include <selinux/selinux.h>
+#include <selinux/label.h>
+#include <selinux/restorecon.h>
+#include <ftw.h>
+#endif
+
 #include "../utils/utils.h"
 #include "init.h"
 #include "../watchdog.h"
@@ -67,6 +74,92 @@
	}
 }

+#if SELINUX_ENABLED
+static const struct selinux_opt se_opts[] = {
+	{ SELABEL_OPT_PATH, "/etc/selinux/targeted/contexts/files/file_contexts" },
+	{ 0, NULL } };
+
+struct selabel_handle *sehandle = NULL;
+
+static int restorecon(const char *pathname)
+{
+	char *secontext = NULL;
+	struct stat sb;
+
+	if (is_selinux_enabled() <= 0 || !sehandle)
+		return 0;
+
+	if (lstat(pathname, &sb) < 0) {
+		return -errno;
+	}
+	if (selabel_lookup(sehandle, &secontext, pathname, sb.st_mode) < 0)
+		return -errno;
+	if (lsetfilecon(pathname, secontext) < 0) {
+		freecon(secontext);
+		return -errno;
+	}
+
+	freecon(secontext);
+	return 0;
+}
+
+static int nftw_restorecon(const char* filename, const struct stat* statptr,
+	int fileflags, struct FTW* pftw)
+{
+	restorecon(filename);
+	return 0;
+}
+
+int restorecon_recursive(const char* pathname)
+{
+	int fd_limit = 20;
+	int flags = FTW_DEPTH | FTW_MOUNT | FTW_PHYS;
+	return nftw(pathname, nftw_restorecon, fd_limit, flags);
+}
+
+static int procd_selinux_init()
+{
+	int enforce = 0;
+	int ret = 0;
+	if (getenv("SELINUX_INIT") == NULL) {
+		putenv((char*)"SELINUX_INIT=YES");
+
+		// load policy
+		if (selinux_init_load_policy(&enforce) == 0)
+			fprintf(stdout, "SELinux policy load success!\n");
+		else if (enforce > 0) {
+			/* SELinux in enforcing mode but load_policy failed */
+			fprintf(stderr, "can't load SELinux Policy. "
+				"Machine is in enforcing mode. Halting now.\n");
+			return EXIT_FAILURE;
+		}
+
+		// set init process security context to u:r:init:s0
+		if (setcon("u:r:init:s0") == 0)
+			fprintf(stdout, "set init context success!\n");
+		else
+			fprintf(stderr, "set init context error!");
+
+		// load file_contexts
+		sehandle = selabel_open(SELABEL_CTX_FILE, se_opts, 1);
+		if (!sehandle)
+			fprintf(stderr, "Error getting file context handle\n");
+		else
+			fprintf(stdout, "%s load success!\n", se_opts[0].value);
+
+		// restore contexts
+		ret = selinux_restorecon("/dev", SELINUX_RESTORECON_RECURSE | \
+					SELINUX_RESTORECON_PROGRESS | \
+					SELINUX_RESTORECON_MASS_RELABEL | \
+					SELINUX_RESTORECON_IGNORE_NOENTRY);
+		if (ret < 0)
+			fprintf(stdout, "selinux_restorecon /dev failed\n");
+	}
+
+	return 0;
+}
+#endif
+
 int
 main(int argc, char **argv)
 {
@@ -80,6 +173,11 @@
	cmdline();
	watchdog_init(1);

+#if SELINUX_ENABLED
+	if (procd_selinux_init() != 0)
+		return EXIT_FAILURE;
+#endif
+
	uloop_init();
	preinit();
	uloop_run();
diff -Naur a/initd/init.h b/initd/init.h
--- a/initd/init.h	2016-02-24 14:42:23.000000000 +0800
+++ b/initd/init.h	2018-02-09 09:54:11.000000000 +0800
@@ -33,4 +33,9 @@
	return -ENOSYS;
 }
 #endif
+
+#if SELINUX_ENABLED
+int restorecon_recursive(const char* pathname);
+#endif
+
 #endif
diff -Naur a/initd/preinit.c b/initd/preinit.c
--- a/initd/preinit.c	2018-02-09 09:50:41.744091527 +0800
+++ b/initd/preinit.c	2018-02-09 09:53:33.000000000 +0800
@@ -82,6 +82,9 @@
 static void
 kmodloader_cb(struct uloop_process *proc, int ret)
 {
+#if SELINUX_ENABLED
+	restorecon_recursive("/dev");
+#endif
 #if BOOT_PLAY == 2
	char *boot_play_cmd[] = {"/sbin/boot-play", "boot", NULL};

diff -Naur a/plug/coldplug.c b/plug/coldplug.c
--- a/plug/coldplug.c	2016-02-24 14:42:23.000000000 +0800
+++ b/plug/coldplug.c	2018-02-09 09:53:15.000000000 +0800
@@ -45,7 +45,12 @@

	umount2("/dev/pts", MNT_DETACH);
	umount2("/dev/", MNT_DETACH);
+
+#if SELINUX_ENABLED
+	mount("devtmpfs", "/dev", "devtmpfs", MS_NOSUID, "mode=0755,size=512K");
+#else
	mount("tmpfs", "/dev", "tmpfs", MS_NOSUID, "mode=0755,size=512K");
+#endif
	ignore(symlink("/tmp/shm", "/dev/shm"));
	mkdir("/dev/pts", 0755);
	umask(oldumask);
diff -Naur a/initd/early.c b/initd/early.c
--- a/initd/early.c	2018-08-30 09:07:17.832175983 +0800
+++ b/initd/early.c	2018-08-30 09:08:21.564178699 +0800
@@ -88,7 +88,11 @@
	}

	if (exist == 0)
+#if SELINUX_ENABLED
+		mount("devtmpfs", "/dev", "devtmpfs", MS_NOATIME | MS_NOSUID, "mode=0755,size=512K");
+#else
		mount("tmpfs", "/dev", "tmpfs", MS_NOATIME | MS_NOSUID, "mode=0755,size=512K");
+#endif
	return;
 }