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
55 #define AID_SHELL 2000 /* adb and debug shell user */
56 #define AID_CACHE 2001 /* cache access */
57 #define AID_DIAG 2002 /* access to diagnostic resources */
58
59 /* The 3000 series are intended for use as supplemental group id's only.
60 * They indicate special Android capabilities that the kernel is aware of. */
61 #define AID_NET_BT_ADMIN 3001 /* bluetooth: create any socket */
62 #define AID_NET_BT 3002 /* bluetooth: create sco, rfcomm or l2cap sockets */
63 #define AID_INET 3003 /* can create AF_INET and AF_INET6 sockets */
64 #define AID_NET_RAW 3004 /* can create raw INET sockets */
65 #define AID_NET_ADMIN 3005 /* can configure interfaces and routing tables. */
66
67 #define AID_MISC 9998 /* access to misc storage */
68 #define AID_NOBODY 9999
69
70 #define AID_APP 10000 /* first app user */
71
72 #if !defined(EXCLUDE_FS_CONFIG_STRUCTURES)
73 struct android_id_info {
74 const char *name;
75 unsigned aid;
76 };
77
78 static struct android_id_info android_ids[] = {
79 { "root", AID_ROOT, },
80 { "system", AID_SYSTEM, },
81 { "radio", AID_RADIO, },
82 { "bluetooth", AID_BLUETOOTH, },
83 { "graphics", AID_GRAPHICS, },
84 { "input", AID_INPUT, },
85 { "audio", AID_AUDIO, },
86 { "camera", AID_CAMERA, },
87 { "log", AID_LOG, },
88 { "compass", AID_COMPASS, },
89 { "mount", AID_MOUNT, },
90 { "wifi", AID_WIFI, },
91 { "dhcp", AID_DHCP, },
92 { "adb", AID_ADB, },
93 { "install", AID_INSTALL, },
94 { "media", AID_MEDIA, },
95 { "shell", AID_SHELL, },
96 { "cache", AID_CACHE, },
97 { "diag", AID_DIAG, },
98 { "net_bt_admin", AID_NET_BT_ADMIN, },
99 { "net_bt", AID_NET_BT, },
100 { "sdcard_rw", AID_SDCARD_RW, },
101 { "vpn", AID_VPN, },
102 { "keystore", AID_KEYSTORE, },
103 { "inet", AID_INET, },
104 { "net_raw", AID_NET_RAW, },
105 { "net_admin", AID_NET_ADMIN, },
106 { "misc", AID_MISC, },
107 { "nobody", AID_NOBODY, },
108 };
109
110 #define android_id_count \
111 (sizeof(android_ids) / sizeof(android_ids[0]))
112
113 struct fs_path_config {
114 unsigned mode;
115 unsigned uid;
116 unsigned gid;
117 const char *prefix;
118 };
119
120 /* Rules for directories.
121 ** These rules are applied based on "first match", so they
122 ** should start with the most specific path and work their
123 ** way up to the root.
124 */
125
126 static struct fs_path_config android_dirs[] = {
127 { 00770, AID_SYSTEM, AID_CACHE, "cache" },
128 { 00771, AID_SYSTEM, AID_SYSTEM, "data/app" },
129 { 00771, AID_SYSTEM, AID_SYSTEM, "data/app-private" },
130 { 00771, AID_SYSTEM, AID_SYSTEM, "data/dalvik-cache" },
131 { 00771, AID_SYSTEM, AID_SYSTEM, "data/data" },
132 { 00771, AID_SHELL, AID_SHELL, "data/local/tmp" },
133 { 00771, AID_SHELL, AID_SHELL, "data/local" },
134 { 01771, AID_SYSTEM, AID_MISC, "data/misc" },
135 { 00770, AID_DHCP, AID_DHCP, "data/misc/dhcp" },
136 { 00771, AID_SYSTEM, AID_SYSTEM, "data" },
137 { 00750, AID_ROOT, AID_SHELL, "sbin" },
138 { 00755, AID_ROOT, AID_SHELL, "system/bin" },
139 { 00755, AID_ROOT, AID_SHELL, "system/xbin" },
140 { 00755, AID_ROOT, AID_ROOT, "system/etc/ppp" },
141 { 00777, AID_ROOT, AID_ROOT, "sdcard" },
142 { 00755, AID_ROOT, AID_ROOT, 0 },
143 };
144
145 /* Rules for files.
146 ** These rules are applied based on "first match", so they
147 ** should start with the most specific path and work their
148 ** way up to the root. Prefixes ending in * denotes wildcard
149 ** and will allow partial matches.
150 */
151 static struct fs_path_config android_files[] = {
152 { 00440, AID_ROOT, AID_SHELL, "system/etc/init.goldfish.rc" },
153 { 00550, AID_ROOT, AID_SHELL, "system/etc/init.goldfish.sh" },
154 { 00440, AID_ROOT, AID_SHELL, "system/etc/init.trout.rc" },
155 { 00550, AID_ROOT, AID_SHELL, "system/etc/init.ril" },
156 { 00550, AID_ROOT, AID_SHELL, "system/etc/init.testmenu" },
157 { 00550, AID_DHCP, AID_SHELL, "system/etc/dhcpcd/dhcpcd-run-hooks" },
158 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/dbus.conf" },
159 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/bluez/main.conf" },
160 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/bluez/input.conf" },
161 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/bluez/audio.conf" },
162 { 00444, AID_RADIO, AID_AUDIO, "system/etc/AudioPara4.csv" },
163 { 00555, AID_ROOT, AID_ROOT, "system/etc/ppp/*" },
164 { 00644, AID_SYSTEM, AID_SYSTEM, "data/app/*" },
165 { 00644, AID_SYSTEM, AID_SYSTEM, "data/app-private/*" },
166 { 00644, AID_APP, AID_APP, "data/data/*" },
167 /* the following two files are INTENTIONALLY set-gid and not set-uid.
168 * Do not change. */
169 { 02755, AID_ROOT, AID_NET_RAW, "system/bin/ping" },
170 { 02755, AID_ROOT, AID_INET, "system/bin/netcfg" },
171 /* the following four files are INTENTIONALLY set-uid, but they
172 * are NOT included on user builds. */
173 { 06755, AID_ROOT, AID_ROOT, "system/xbin/su" },
174 { 06755, AID_ROOT, AID_ROOT, "system/xbin/librank" },
175 { 06755, AID_ROOT, AID_ROOT, "system/xbin/procrank" },
176 { 06755, AID_ROOT, AID_ROOT, "system/xbin/procmem" },
177 { 06755, AID_ROOT, AID_ROOT, "system/xbin/tcpdump" },
178 { 00755, AID_ROOT, AID_SHELL, "system/bin/*" },
179 { 00755, AID_ROOT, AID_SHELL, "system/xbin/*" },
180 { 00750, AID_ROOT, AID_SHELL, "sbin/*" },
181 { 00755, AID_ROOT, AID_ROOT, "bin/*" },
182 { 00750, AID_ROOT, AID_SHELL, "init*" },
183 { 00644, AID_ROOT, AID_ROOT, 0 },
184 };
185
fs_config(const char * path,int dir,unsigned * uid,unsigned * gid,unsigned * mode)186 static inline void fs_config(const char *path, int dir,
187 unsigned *uid, unsigned *gid, unsigned *mode)
188 {
189 struct fs_path_config *pc;
190 int plen;
191
192 pc = dir ? android_dirs : android_files;
193 plen = strlen(path);
194 for(; pc->prefix; pc++){
195 int len = strlen(pc->prefix);
196 if (dir) {
197 if(plen < len) continue;
198 if(!strncmp(pc->prefix, path, len)) break;
199 continue;
200 }
201 /* If name ends in * then allow partial matches. */
202 if (pc->prefix[len -1] == '*') {
203 if(!strncmp(pc->prefix, path, len - 1)) break;
204 } else if (plen == len){
205 if(!strncmp(pc->prefix, path, len)) break;
206 }
207 }
208 *uid = pc->uid;
209 *gid = pc->gid;
210 *mode = (*mode & (~07777)) | pc->mode;
211
212 #if 0
213 fprintf(stderr,"< '%s' '%s' %d %d %o >\n",
214 path, pc->prefix ? pc->prefix : "", *uid, *gid, *mode);
215 #endif
216 }
217 #endif
218 #endif
219