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platform_system_core/sdcard/Android.mk

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sdcard: a program to create a "virtual" /sdcard pointed at a path sdcard is a program that uses FUSE to emulate FAT-on-sdcard style directory permissions (all files are given fixed owner, group, and permissions at creation, owner, group, and permissions are not changeable, symlinks and hardlinks are not createable, etc. usage: sdcard <path> <uid> <gid> It must be run as root, but will change to uid/gid as soon as it mounts a filesystem on /sdcard. It will refuse to run if uid or gid are zero. Change-Id: I9a5d2e5daaebeee632f8470172cbb77b7fa689f8 Signed-off-by: Brian Swetland <swetland@google.com>
2010-08-13 09:01:08 +08:00
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_SRC_FILES:= sdcard.c
LOCAL_MODULE:= sdcard
Make sdcard daemon multi-threaded. The essential idea here is that a handler thread only needs to hold a lock on the global node table while it is manipulating nodes. The actual I/O operation is then performed without holding any locks. By default, we use 2 threads but this can be configured on the command-line. Work is sheduled somewhat arbitrarily by the handler threads. Whichever thread happens to read() the next request first wins the right process it. This policy is very simple but potentially wastes threads when there isn't much work to be done. We can always improve this later if needed. Change-Id: Id27a27c2c9b40d4f8e35a6bef9dd84f0dfacf337
2012-05-27 05:32:54 +08:00
LOCAL_CFLAGS := -Wall -Wno-unused-parameter
sdcard: a program to create a "virtual" /sdcard pointed at a path sdcard is a program that uses FUSE to emulate FAT-on-sdcard style directory permissions (all files are given fixed owner, group, and permissions at creation, owner, group, and permissions are not changeable, symlinks and hardlinks are not createable, etc. usage: sdcard <path> <uid> <gid> It must be run as root, but will change to uid/gid as soon as it mounts a filesystem on /sdcard. It will refuse to run if uid or gid are zero. Change-Id: I9a5d2e5daaebeee632f8470172cbb77b7fa689f8 Signed-off-by: Brian Swetland <swetland@google.com>
2010-08-13 09:01:08 +08:00
Richer SD card permissions through FUSE. Changes the FUSE daemon to synthesize an Android-specific set of filesystem permissions, even when the underlying media storage is permissionless. This is designed to support several features: First, apps can access their own files in /Android/data/com.example/ without requiring any external storage permissions. This is enabled by allowing o+x on parent directories, and assigning the UID owner based on the directory name (package name). The mapping from package to appId is parsed from packages.list, which is updated when apps are added/removed. Changes are observed through inotify. It creates missing package name directories when requested and valid. Second, support for separate permissions for photos and audio/video content on the device through new GIDs which are assigned based on top-level directory names. Finally, support for multi-user separation on the same physical media through new /Android/user/ directory, which will be bind-mounted into place. It recursively applies the above rules to each secondary user. rwxrwx--x root:sdcard_rw / rwxrwx--- root:sdcard_pics /Pictures rwxrwx--- root:sdcard_av /Music rwxrwx--x root:sdcard_rw /Android rwxrwx--x root:sdcard_rw /Android/data rwxrwx--- u0_a12:sdcard_rw /Android/data/com.example rwxrwx--x root:sdcard_rw /Android/obb/ rwxrwx--- u0_a12:sdcard_rw /Android/obb/com.example rwxrwx--- root:sdcard_all /Android/user rwxrwx--x root:sdcard_rw /Android/user/10 rwxrwx--- u10_a12:sdcard_rw /Android/user/10/Android/data/com.example These derived permissions are disabled by default. Switched option parsing to getopt(). Change-Id: I21bf5d79d13f0f07a6a116122b16395f4f97505b
2013-07-04 08:08:29 +08:00
LOCAL_SHARED_LIBRARIES := libc libcutils
sdcard: a program to create a "virtual" /sdcard pointed at a path sdcard is a program that uses FUSE to emulate FAT-on-sdcard style directory permissions (all files are given fixed owner, group, and permissions at creation, owner, group, and permissions are not changeable, symlinks and hardlinks are not createable, etc. usage: sdcard <path> <uid> <gid> It must be run as root, but will change to uid/gid as soon as it mounts a filesystem on /sdcard. It will refuse to run if uid or gid are zero. Change-Id: I9a5d2e5daaebeee632f8470172cbb77b7fa689f8 Signed-off-by: Brian Swetland <swetland@google.com>
2010-08-13 09:01:08 +08:00
include $(BUILD_EXECUTABLE)