config-fs-gen: Initial commit
Change-Id: Ie9655475aa46a393ea829f9321452d315c68d7fa
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LuK1337
164
config-fs-gen/README.md
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164
config-fs-gen/README.md
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# config-fs-gen
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```
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usage: config-fs-gen.py [-h]
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capability_header_path
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android_filesystem_config_header_path
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vendor_group_path fs_config_paths
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[fs_config_paths ...]
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Convert /vendor/etc/group ×
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/(system|vendor)/etc/(fs_config_dirs|fs_config_files) to config.fs
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positional arguments:
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capability_header_path
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path to
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{android}/bionic/libc/kernel/uapi/linux/capability.h
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android_filesystem_config_header_path
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path to {android}/system/core/libcutils/include/privat
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e/android_filesystem_config.h
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vendor_group_path path to {rom}/vendor/etc/group
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fs_config_paths paths to
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{rom}/(system|vendor)/etc/fs_config_(dirs|files)
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optional arguments:
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-h, --help show this help message and exit
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```
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```
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Example usage:
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$ ./config-fs-gen.py ~/lineage-16.0/bionic/libc/kernel/uapi/linux/capability.h \
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~/lineage-16.0/system/core/libcutils/include/private/android_filesystem_config.h \
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~/lineage-16.0/out/target/product/guacamole/vendor/etc/group \
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~/lineage-16.0/out/target/product/guacamole/{system,vendor}/etc/{fs_config_dirs,fs_config_files}
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[AID_VENDOR_QTI_DIAG]
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value:2901
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[AID_VENDOR_QDSS]
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value:2902
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[AID_VENDOR_RFS]
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value:2903
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[AID_VENDOR_RFS_SHARED]
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value:2904
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[AID_VENDOR_ADPL_ODL]
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value:2905
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[AID_VENDOR_QRTR]
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value:2906
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[bt_firmware/]
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mode: 0771
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user: AID_SYSTEM
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group: AID_SYSTEM
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caps: 0
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[dsp/]
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mode: 0771
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user: AID_MEDIA
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group: AID_MEDIA
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caps: 0
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[firmware/]
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mode: 0771
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user: AID_SYSTEM
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group: AID_SYSTEM
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caps: 0
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[firmware/image/*]
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mode: 0771
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user: AID_SYSTEM
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group: AID_SYSTEM
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caps: 0
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[persist/]
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mode: 0771
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user: AID_SYSTEM
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group: AID_SYSTEM
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caps: 0
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[vendor/bin/cnd]
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mode: 0755
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user: AID_SYSTEM
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group: AID_SYSTEM
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caps: NET_BIND_SERVICE NET_ADMIN BLOCK_SUSPEND
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[vendor/bin/hw/android.hardware.bluetooth@1.0-service-qti]
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mode: 0755
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user: AID_BLUETOOTH
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group: AID_BLUETOOTH
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caps: NET_ADMIN BLOCK_SUSPEND
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[vendor/bin/ims_rtp_daemon]
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mode: 0755
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user: AID_SYSTEM
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group: AID_RADIO
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caps: NET_BIND_SERVICE
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[vendor/bin/imsdatadaemon]
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mode: 0755
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user: AID_SYSTEM
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group: AID_SYSTEM
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caps: NET_BIND_SERVICE
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[vendor/bin/imsrcsd]
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mode: 0755
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user: AID_SYSTEM
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group: AID_RADIO
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caps: NET_BIND_SERVICE WAKE_ALARM BLOCK_SUSPEND
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[vendor/bin/loc_launcher]
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mode: 0755
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user: AID_GPS
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group: AID_GPS
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caps: SETGID SETUID
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[vendor/bin/pd-mapper]
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mode: 0755
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user: AID_SYSTEM
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group: AID_SYSTEM
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caps: NET_BIND_SERVICE
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[vendor/bin/pm-service]
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mode: 0755
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user: AID_SYSTEM
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group: AID_SYSTEM
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caps: NET_BIND_SERVICE
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[vendor/bin/sensors.qti]
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mode: 0755
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user: AID_SYSTEM
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group: AID_SYSTEM
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caps: NET_BIND_SERVICE
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[vendor/bin/slim_daemon]
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mode: 0755
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user: AID_GPS
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group: AID_GPS
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caps: NET_BIND_SERVICE
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[vendor/bin/wcnss_filter]
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mode: 0755
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user: AID_BLUETOOTH
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group: AID_BLUETOOTH
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caps: BLOCK_SUSPEND
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[vendor/bin/xtwifi-client]
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mode: 0755
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user: AID_GPS
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group: AID_GPS
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caps: NET_BIND_SERVICE WAKE_ALARM BLOCK_SUSPEND
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[vendor/firmware_mnt/image/*]
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mode: 0771
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user: AID_ROOT
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group: AID_SYSTEM
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caps: 0
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[vendor/lib/modules-aging/*]
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mode: 0644
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user: AID_ROOT
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group: AID_ROOT
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caps: 0
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```
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137
config-fs-gen/config-fs-gen.py
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137
config-fs-gen/config-fs-gen.py
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@@ -0,0 +1,137 @@
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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from __future__ import print_function
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import argparse
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import parse
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import struct
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def parse_cmdline():
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parser = argparse.ArgumentParser(
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description='Convert /vendor/etc/group × /(system|vendor)/etc/(fs_config_dirs|fs_config_files) to config.fs')
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parser.add_argument('capability_header_path',
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help='path to {android}/bionic/libc/kernel/uapi/linux/capability.h')
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parser.add_argument('android_filesystem_config_header_path',
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help='path to {android}/system/core/libcutils/include/private/android_filesystem_config.h')
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parser.add_argument('vendor_group_path',
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help='path to {rom}/vendor/etc/group')
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parser.add_argument('fs_config_paths', nargs='+',
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help='paths to {rom}/(system|vendor)/etc/fs_config_(dirs|files)')
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return parser.parse_args()
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def get_capabilities(capability_header_path):
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capabilities = {}
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with open(capability_header_path, 'r') as file:
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for line in file:
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s = parse.search('#define CAP_{:w} {:d}', line)
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if s is not None:
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capabilities[s[1]] = s[0]
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return capabilities
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def get_groups(android_filesystem_config_header_path, vendor_group_path):
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system_groups = {}
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vendor_groups = {}
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with open(android_filesystem_config_header_path, 'r') as file:
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for line in file:
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s = parse.search('#define AID_{:w} {:d}', line)
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if s is not None:
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system_groups[s[1]] = 'AID_' + s[0]
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with open(vendor_group_path, 'r') as file:
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for line in file:
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name, _, uid, _ = line.split(':', 3)
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vendor_groups[uid] = 'AID_' + name.upper()
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return system_groups, vendor_groups
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def get_fs_path_configs(fs_config_paths, system_groups, vendor_groups):
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fs_path_config = {}
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for fs_config_path in args.fs_config_paths:
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with open(fs_config_path, 'rb') as file:
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while True:
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bytes = file.read(struct.calcsize('<HHHHQ'))
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if bytes is b'':
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break
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length, mode, uid, gid, caps = struct.unpack('<HHHHQ', bytes)
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name = file.read(length - len(bytes)).decode().rstrip('\x00')
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fs_path_config[name] = {
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'mode': mode,
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'user': gid_to_str(uid, system_groups, vendor_groups),
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'group': gid_to_str(gid, system_groups, vendor_groups),
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'caps': caps_to_str(caps)
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}
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return fs_path_config
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def caps_to_str(caps):
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caps_list = []
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# return '0' directly if there are no special capabilities set
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if caps == 0:
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return str(caps)
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# try to match well known linux capabilities
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for cap in capabilities:
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cap_mask_long = 1 << cap
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if caps & cap_mask_long:
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caps = caps & ~cap_mask_long
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caps_list.append(capabilities[cap])
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# append unmatched caps if needed
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if caps > 0:
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caps_list.append(str(caps))
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return ' '.join(caps_list)
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def gid_to_str(gid, system_groups, vendor_groups):
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if gid in system_groups:
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return system_groups[gid]
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if gid in vendor_groups:
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return vendor_groups[gid]
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return gid
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if __name__ == '__main__':
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args = parse_cmdline()
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capabilities = get_capabilities(args.capability_header_path)
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system_groups, vendor_groups = get_groups(
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args.android_filesystem_config_header_path,
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args.vendor_group_path)
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fs_path_configs = get_fs_path_configs(
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args.fs_config_paths,
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system_groups,
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vendor_groups)
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# print vendor AIDs
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for gid in sorted(vendor_groups):
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print('[{}]'.format(vendor_groups[gid]))
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print('value:{}'.format(gid))
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print()
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# print {system,vendor} fs path configs
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for name in sorted(fs_path_configs):
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print('[{}]'.format(name))
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print('mode: {:04o}'.format(fs_path_configs[name]['mode']))
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print('user: {}'.format(fs_path_configs[name]['user']))
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print('group: {}'.format(fs_path_configs[name]['group']))
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print('caps: {}'.format(fs_path_configs[name]['caps']))
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print()
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