Add an installd command to link files (d845c961) · Commits · e / os / android_frameworks_native-old

cmds/installd/commands.cpp

+25 −0

Original line number	Original line	Diff line number	Diff line
	@@ -1778,6 +1778,31 @@ int rm_package_dir(const char* apk_path)
	return delete_dir_contents(apk_path, 1 /* also_delete_dir / , NULL / exclusion_predicate */);		return delete_dir_contents(apk_path, 1 /* also_delete_dir / , NULL / exclusion_predicate */);
	}		}

			int link_file(const char* relative_path, const char* from_base, const char* to_base) {
			char from_path[PKG_PATH_MAX];
			char to_path[PKG_PATH_MAX];
			snprintf(from_path, PKG_PATH_MAX, "%s/%s", from_base, relative_path);
			snprintf(to_path, PKG_PATH_MAX, "%s/%s", to_base, relative_path);

			if (validate_apk_path_subdirs(from_path)) {
			ALOGE("invalid app data sub-path '%s' (bad prefix)\n", from_path);
			return -1;
			}

			if (validate_apk_path_subdirs(to_path)) {
			ALOGE("invalid app data sub-path '%s' (bad prefix)\n", to_path);
			return -1;
			}

			const int ret = link(from_path, to_path);
			if (ret < 0) {
			ALOGE("link(%s, %s) failed : %s", from_path, to_path, strerror(errno));
			return -1;
			}

			return 0;
			}

	int calculate_oat_file_path(char path[PKG_PATH_MAX], const char oat_dir, const char apk_path,		int calculate_oat_file_path(char path[PKG_PATH_MAX], const char oat_dir, const char apk_path,
	const char *instruction_set) {		const char *instruction_set) {
	char *file_name_start;		char *file_name_start;

cmds/installd/installd.cpp

+8 −1

Original line number	Original line	Diff line number	Diff line
	@@ -179,6 +179,12 @@ static int do_rm_package_dir(char **arg, char reply[REPLY_MAX] __unused)
	return rm_package_dir(arg[0]);		return rm_package_dir(arg[0]);
	}		}

			static int do_link_file(char **arg, char reply[REPLY_MAX] __unused)
			{
			/* relative_path, from_base, to_base */
			return link_file(arg[0], arg[1], arg[2]);
			}

	struct cmdinfo {		struct cmdinfo {
	const char *name;		const char *name;
	unsigned numargs;		unsigned numargs;
	@@ -210,6 +216,7 @@ struct cmdinfo cmds[] = {
	{ "restorecondata", 4, do_restorecon_data },		{ "restorecondata", 4, do_restorecon_data },
	{ "createoatdir", 2, do_create_oat_dir },		{ "createoatdir", 2, do_create_oat_dir },
	{ "rmpackagedir", 1, do_rm_package_dir },		{ "rmpackagedir", 1, do_rm_package_dir },
			{ "linkfile", 3, do_link_file }
	};		};

	static int readx(int s, void *_buf, int count)		static int readx(int s, void *_buf, int count)

cmds/installd/installd.h

+2 −0

Original line number	Original line	Diff line number	Diff line
	@@ -203,6 +203,7 @@ int get_path_from_string(dir_rec_t* rec, const char* path);
	int copy_and_append(dir_rec_t* dst, const dir_rec_t* src, const char* suffix);		int copy_and_append(dir_rec_t* dst, const dir_rec_t* src, const char* suffix);

	int validate_apk_path(const char *path);		int validate_apk_path(const char *path);
			int validate_apk_path_subdirs(const char *path);

	int append_and_increment(char** dst, const char* src, size_t* dst_size);		int append_and_increment(char** dst, const char* src, size_t* dst_size);

	@@ -254,3 +255,4 @@ int calculate_oat_file_path(char path[PKG_PATH_MAX], const char *oat_dir, const
	const char *instruction_set);		const char *instruction_set);
	int move_package_dir(char path[PKG_PATH_MAX], const char oat_dir, const char apk_path,		int move_package_dir(char path[PKG_PATH_MAX], const char oat_dir, const char apk_path,
	const char *instruction_set);		const char *instruction_set);
			int link_file(const char relative_path, const char from_base, const char *to_base);

cmds/installd/utils.cpp

+16 −8

Original line number	Original line	Diff line number	Diff line
	@@ -1043,15 +1043,13 @@ int copy_and_append(dir_rec_t* dst, const dir_rec_t* src, const char* suffix) {
	}		}

	/**		/**
	* Check whether path points to a valid path for an APK file. Only one level of		* Check whether path points to a valid path for an APK file. The path must
	* subdirectory names is allowed. Returns -1 when an invalid path is encountered		* begin with a whitelisted prefix path and must be no deeper than \|maxSubdirs\| within
	* and 0 when a valid path is encountered.		* that path. Returns -1 when an invalid path is encountered and 0 when a valid path
			* is encountered.
	*/		*/
	int validate_apk_path(const char *path)		static int validate_apk_path_internal(const char *path, int maxSubdirs) {
	{
	const dir_rec_t* dir = NULL;		const dir_rec_t* dir = NULL;
	int maxSubdirs = 1;

	if (!strncmp(path, android_app_dir.path, android_app_dir.len)) {		if (!strncmp(path, android_app_dir.path, android_app_dir.len)) {
	dir = &android_app_dir;		dir = &android_app_dir;
	} else if (!strncmp(path, android_app_private_dir.path, android_app_private_dir.len)) {		} else if (!strncmp(path, android_app_private_dir.path, android_app_private_dir.len)) {
	@@ -1060,7 +1058,9 @@ int validate_apk_path(const char *path)
	dir = &android_asec_dir;		dir = &android_asec_dir;
	} else if (!strncmp(path, android_mnt_expand_dir.path, android_mnt_expand_dir.len)) {		} else if (!strncmp(path, android_mnt_expand_dir.path, android_mnt_expand_dir.len)) {
	dir = &android_mnt_expand_dir;		dir = &android_mnt_expand_dir;
			if (maxSubdirs < 2) {
	maxSubdirs = 2;		maxSubdirs = 2;
			}
	} else {		} else {
	return -1;		return -1;
	}		}
	@@ -1068,6 +1068,14 @@ int validate_apk_path(const char *path)
	return validate_path(dir, path, maxSubdirs);		return validate_path(dir, path, maxSubdirs);
	}		}

			int validate_apk_path(const char* path) {
			return validate_apk_path_internal(path, 1 /* maxSubdirs */);
			}

			int validate_apk_path_subdirs(const char* path) {
			return validate_apk_path_internal(path, 3 /* maxSubdirs */);
			}

	int append_and_increment(char** dst, const char* src, size_t* dst_size) {		int append_and_increment(char** dst, const char* src, size_t* dst_size) {
	ssize_t ret = strlcpy(dst, src, dst_size);		ssize_t ret = strlcpy(dst, src, dst_size);
	if (ret < 0 \|\| (size_t) ret >= *dst_size) {		if (ret < 0 \|\| (size_t) ret >= *dst_size) {