1 /*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 /* This file is used to define the properties of the filesystem
18 ** images generated by build tools (mkbootfs and mkyaffs2image) and
19 ** by the device side of adb.
20 */
21
22 #ifndef _ANDROID_FILESYSTEM_CONFIG_H_
23 #define _ANDROID_FILESYSTEM_CONFIG_H_
24
25 #include <string.h>
26 #include <sys/stat.h>
27 #include <sys/types.h>
28
29 /* This is the master Users and Groups config for the platform.
30 ** DO NOT EVER RENUMBER.
31 */
32
33 #define AID_ROOT 0 /* traditional unix root user */
34
35 #define AID_SYSTEM 1000 /* system server */
36
37 #define AID_RADIO 1001 /* telephony subsystem, RIL */
38 #define AID_BLUETOOTH 1002 /* bluetooth subsystem */
39 #define AID_GRAPHICS 1003 /* graphics devices */
40 #define AID_INPUT 1004 /* input devices */
41 #define AID_AUDIO 1005 /* audio devices */
42 #define AID_CAMERA 1006 /* camera devices */
43 #define AID_LOG 1007 /* log devices */
44 #define AID_COMPASS 1008 /* compass device */
45 #define AID_MOUNT 1009 /* mountd socket */
46 #define AID_WIFI 1010 /* wifi subsystem */
47 #define AID_ADB 1011 /* android debug bridge (adbd) */
48 #define AID_INSTALL 1012 /* group for installing packages */
49 #define AID_MEDIA 1013 /* mediaserver process */
50 #define AID_DHCP 1014 /* dhcp client */
51 #define AID_SDCARD_RW 1015 /* external storage write access */
52 #define AID_VPN 1016 /* vpn system */
53 #define AID_KEYSTORE 1017 /* keystore subsystem */
54 #define AID_USB 1018 /* USB devices */
55 #define AID_DRM 1019 /* DRM server */
56 #define AID_AVAILABLE 1020 /* available for use */
57 #define AID_GPS 1021 /* GPS daemon */
58 #define AID_UNUSED1 1022 /* deprecated, DO NOT USE */
59 #define AID_MEDIA_RW 1023 /* internal media storage write access */
60 #define AID_MTP 1024 /* MTP USB driver access */
61 #define AID_NFC 1025 /* nfc subsystem */
62 #define AID_DRMRPC 1026 /* group for drm rpc */
63
64 #define AID_SHELL 2000 /* adb and debug shell user */
65 #define AID_CACHE 2001 /* cache access */
66 #define AID_DIAG 2002 /* access to diagnostic resources */
67
68 /* The 3000 series are intended for use as supplemental group id's only.
69 * They indicate special Android capabilities that the kernel is aware of. */
70 #define AID_NET_BT_ADMIN 3001 /* bluetooth: create any socket */
71 #define AID_NET_BT 3002 /* bluetooth: create sco, rfcomm or l2cap sockets */
72 #define AID_INET 3003 /* can create AF_INET and AF_INET6 sockets */
73 #define AID_NET_RAW 3004 /* can create raw INET sockets */
74 #define AID_NET_ADMIN 3005 /* can configure interfaces and routing tables. */
75 #define AID_NET_BW_STATS 3006 /* read bandwidth statistics */
76 #define AID_NET_BW_ACCT 3007 /* change bandwidth statistics accounting */
77
78 #define AID_MISC 9998 /* access to misc storage */
79 #define AID_NOBODY 9999
80
81 #define AID_APP 10000 /* first app user */
82
83 #if !defined(EXCLUDE_FS_CONFIG_STRUCTURES)
84 struct android_id_info {
85 const char *name;
86 unsigned aid;
87 };
88
89 static const struct android_id_info android_ids[] = {
90 { "root", AID_ROOT, },
91 { "system", AID_SYSTEM, },
92 { "radio", AID_RADIO, },
93 { "bluetooth", AID_BLUETOOTH, },
94 { "graphics", AID_GRAPHICS, },
95 { "input", AID_INPUT, },
96 { "audio", AID_AUDIO, },
97 { "camera", AID_CAMERA, },
98 { "log", AID_LOG, },
99 { "compass", AID_COMPASS, },
100 { "mount", AID_MOUNT, },
101 { "wifi", AID_WIFI, },
102 { "dhcp", AID_DHCP, },
103 { "adb", AID_ADB, },
104 { "install", AID_INSTALL, },
105 { "media", AID_MEDIA, },
106 { "drm", AID_DRM, },
107 { "available", AID_AVAILABLE, },
108 { "nfc", AID_NFC, },
109 { "drmrpc", AID_DRMRPC, },
110 { "shell", AID_SHELL, },
111 { "cache", AID_CACHE, },
112 { "diag", AID_DIAG, },
113 { "net_bt_admin", AID_NET_BT_ADMIN, },
114 { "net_bt", AID_NET_BT, },
115 { "sdcard_rw", AID_SDCARD_RW, },
116 { "media_rw", AID_MEDIA_RW, },
117 { "vpn", AID_VPN, },
118 { "keystore", AID_KEYSTORE, },
119 { "usb", AID_USB, },
120 { "mtp", AID_MTP, },
121 { "gps", AID_GPS, },
122 { "inet", AID_INET, },
123 { "net_raw", AID_NET_RAW, },
124 { "net_admin", AID_NET_ADMIN, },
125 { "net_bw_stats", AID_NET_BW_STATS, },
126 { "net_bw_acct", AID_NET_BW_ACCT, },
127 { "misc", AID_MISC, },
128 { "nobody", AID_NOBODY, },
129 };
130
131 #define android_id_count \
132 (sizeof(android_ids) / sizeof(android_ids[0]))
133
134 struct fs_path_config {
135 unsigned mode;
136 unsigned uid;
137 unsigned gid;
138 const char *prefix;
139 };
140
141 /* Rules for directories.
142 ** These rules are applied based on "first match", so they
143 ** should start with the most specific path and work their
144 ** way up to the root.
145 */
146
147 static struct fs_path_config android_dirs[] = {
148 { 00770, AID_SYSTEM, AID_CACHE, "cache" },
149 { 00771, AID_SYSTEM, AID_SYSTEM, "data/app" },
150 { 00771, AID_SYSTEM, AID_SYSTEM, "data/app-private" },
151 { 00771, AID_SYSTEM, AID_SYSTEM, "data/dalvik-cache" },
152 { 00771, AID_SYSTEM, AID_SYSTEM, "data/data" },
153 { 00771, AID_SHELL, AID_SHELL, "data/local/tmp" },
154 { 00771, AID_SHELL, AID_SHELL, "data/local" },
155 { 01771, AID_SYSTEM, AID_MISC, "data/misc" },
156 { 00770, AID_DHCP, AID_DHCP, "data/misc/dhcp" },
157 { 00775, AID_MEDIA_RW, AID_MEDIA_RW, "data/media" },
158 { 00775, AID_MEDIA_RW, AID_MEDIA_RW, "data/media/Music" },
159 { 00771, AID_SYSTEM, AID_SYSTEM, "data" },
160 { 00750, AID_ROOT, AID_SHELL, "sbin" },
161 { 00755, AID_ROOT, AID_SHELL, "system/bin" },
162 { 00755, AID_ROOT, AID_SHELL, "system/vendor" },
163 { 00755, AID_ROOT, AID_SHELL, "system/xbin" },
164 { 00755, AID_ROOT, AID_ROOT, "system/etc/ppp" },
165 { 00777, AID_ROOT, AID_ROOT, "sdcard" },
166 { 00755, AID_ROOT, AID_ROOT, 0 },
167 };
168
169 /* Rules for files.
170 ** These rules are applied based on "first match", so they
171 ** should start with the most specific path and work their
172 ** way up to the root. Prefixes ending in * denotes wildcard
173 ** and will allow partial matches.
174 */
175 static struct fs_path_config android_files[] = {
176 { 00440, AID_ROOT, AID_SHELL, "system/etc/init.goldfish.rc" },
177 { 00550, AID_ROOT, AID_SHELL, "system/etc/init.goldfish.sh" },
178 { 00440, AID_ROOT, AID_SHELL, "system/etc/init.trout.rc" },
179 { 00550, AID_ROOT, AID_SHELL, "system/etc/init.ril" },
180 { 00550, AID_ROOT, AID_SHELL, "system/etc/init.testmenu" },
181 { 00550, AID_DHCP, AID_SHELL, "system/etc/dhcpcd/dhcpcd-run-hooks" },
182 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/dbus.conf" },
183 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/bluetooth/main.conf" },
184 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/bluetooth/input.conf" },
185 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/bluetooth/audio.conf" },
186 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/bluetooth/network.conf" },
187 { 00444, AID_NET_BT, AID_NET_BT, "system/etc/bluetooth/blacklist.conf" },
188 { 00640, AID_SYSTEM, AID_SYSTEM, "system/etc/bluetooth/auto_pairing.conf" },
189 { 00444, AID_RADIO, AID_AUDIO, "system/etc/AudioPara4.csv" },
190 { 00555, AID_ROOT, AID_ROOT, "system/etc/ppp/*" },
191 { 00555, AID_ROOT, AID_ROOT, "system/etc/rc.*" },
192 { 00644, AID_SYSTEM, AID_SYSTEM, "data/app/*" },
193 { 00644, AID_MEDIA_RW, AID_MEDIA_RW, "data/media/*" },
194 { 00644, AID_SYSTEM, AID_SYSTEM, "data/app-private/*" },
195 { 00644, AID_APP, AID_APP, "data/data/*" },
196 /* the following two files are INTENTIONALLY set-gid and not set-uid.
197 * Do not change. */
198 { 02755, AID_ROOT, AID_NET_RAW, "system/bin/ping" },
199 { 02750, AID_ROOT, AID_INET, "system/bin/netcfg" },
200 /* the following five files are INTENTIONALLY set-uid, but they
201 * are NOT included on user builds. */
202 { 06755, AID_ROOT, AID_ROOT, "system/xbin/su" },
203 { 06755, AID_ROOT, AID_ROOT, "system/xbin/librank" },
204 { 06755, AID_ROOT, AID_ROOT, "system/xbin/procrank" },
205 { 06755, AID_ROOT, AID_ROOT, "system/xbin/procmem" },
206 { 06755, AID_ROOT, AID_ROOT, "system/xbin/tcpdump" },
207 { 04770, AID_ROOT, AID_RADIO, "system/bin/pppd-ril" },
208 /* the following file is INTENTIONALLY set-uid, and IS included
209 * in user builds. */
210 { 06750, AID_ROOT, AID_SHELL, "system/bin/run-as" },
211 { 00755, AID_ROOT, AID_SHELL, "system/bin/*" },
212 { 00755, AID_ROOT, AID_ROOT, "system/lib/valgrind/*" },
213 { 00755, AID_ROOT, AID_SHELL, "system/xbin/*" },
214 { 00755, AID_ROOT, AID_SHELL, "system/vendor/bin/*" },
215 { 00750, AID_ROOT, AID_SHELL, "sbin/*" },
216 { 00755, AID_ROOT, AID_ROOT, "bin/*" },
217 { 00750, AID_ROOT, AID_SHELL, "init*" },
218 { 00750, AID_ROOT, AID_SHELL, "charger*" },
219 { 00644, AID_ROOT, AID_ROOT, 0 },
220 };
221
fs_config(const char * path,int dir,unsigned * uid,unsigned * gid,unsigned * mode)222 static inline void fs_config(const char *path, int dir,
223 unsigned *uid, unsigned *gid, unsigned *mode)
224 {
225 struct fs_path_config *pc;
226 int plen;
227
228 pc = dir ? android_dirs : android_files;
229 plen = strlen(path);
230 for(; pc->prefix; pc++){
231 int len = strlen(pc->prefix);
232 if (dir) {
233 if(plen < len) continue;
234 if(!strncmp(pc->prefix, path, len)) break;
235 continue;
236 }
237 /* If name ends in * then allow partial matches. */
238 if (pc->prefix[len -1] == '*') {
239 if(!strncmp(pc->prefix, path, len - 1)) break;
240 } else if (plen == len){
241 if(!strncmp(pc->prefix, path, len)) break;
242 }
243 }
244 *uid = pc->uid;
245 *gid = pc->gid;
246 *mode = (*mode & (~07777)) | pc->mode;
247
248 #if 0
249 fprintf(stderr,"< '%s' '%s' %d %d %o >\n",
250 path, pc->prefix ? pc->prefix : "", *uid, *gid, *mode);
251 #endif
252 }
253 #endif
254 #endif
255