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_GPS 1021 /* GPS daemon */
56 #define AID_UNUSED1 1022 /* deprecated, DO NOT USE */
57 #define AID_RFU1 1023 /* RFU */
58 #define AID_RFU2 1024 /* RFU */
59 #define AID_NFC 1025 /* nfc subsystem */
60
61 #define AID_SHELL 2000 /* adb and debug shell user */
62 #define AID_CACHE 2001 /* cache access */
63 #define AID_DIAG 2002 /* access to diagnostic resources */
64
65 /* The 3000 series are intended for use as supplemental group id's only.
66 * They indicate special Android capabilities that the kernel is aware of. */
67 #define AID_NET_BT_ADMIN 3001 /* bluetooth: create any socket */
68 #define AID_NET_BT 3002 /* bluetooth: create sco, rfcomm or l2cap sockets */
69 #define AID_INET 3003 /* can create AF_INET and AF_INET6 sockets */
70 #define AID_NET_RAW 3004 /* can create raw INET sockets */
71 #define AID_NET_ADMIN 3005 /* can configure interfaces and routing tables. */
72
73 #define AID_MISC 9998 /* access to misc storage */
74 #define AID_NOBODY 9999
75
76 #define AID_APP 10000 /* first app user */
77
78 #if !defined(EXCLUDE_FS_CONFIG_STRUCTURES)
79 struct android_id_info {
80 const char *name;
81 unsigned aid;
82 };
83
84 static const struct android_id_info android_ids[] = {
85 { "root", AID_ROOT, },
86 { "system", AID_SYSTEM, },
87 { "radio", AID_RADIO, },
88 { "bluetooth", AID_BLUETOOTH, },
89 { "graphics", AID_GRAPHICS, },
90 { "input", AID_INPUT, },
91 { "audio", AID_AUDIO, },
92 { "camera", AID_CAMERA, },
93 { "log", AID_LOG, },
94 { "compass", AID_COMPASS, },
95 { "mount", AID_MOUNT, },
96 { "wifi", AID_WIFI, },
97 { "dhcp", AID_DHCP, },
98 { "adb", AID_ADB, },
99 { "install", AID_INSTALL, },
100 { "media", AID_MEDIA, },
101 { "nfc", AID_NFC, },
102 { "shell", AID_SHELL, },
103 { "cache", AID_CACHE, },
104 { "diag", AID_DIAG, },
105 { "net_bt_admin", AID_NET_BT_ADMIN, },
106 { "net_bt", AID_NET_BT, },
107 { "sdcard_rw", AID_SDCARD_RW, },
108 { "vpn", AID_VPN, },
109 { "keystore", AID_KEYSTORE, },
110 { "usb", AID_USB, },
111 { "gps", AID_GPS, },
112 { "inet", AID_INET, },
113 { "net_raw", AID_NET_RAW, },
114 { "net_admin", AID_NET_ADMIN, },
115 { "misc", AID_MISC, },
116 { "nobody", AID_NOBODY, },
117 };
118
119 #define android_id_count \
120 (sizeof(android_ids) / sizeof(android_ids[0]))
121
122 struct fs_path_config {
123 unsigned mode;
124 unsigned uid;
125 unsigned gid;
126 const char *prefix;
127 };
128
129 /* Rules for directories.
130 ** These rules are applied based on "first match", so they
131 ** should start with the most specific path and work their
132 ** way up to the root.
133 */
134
135 static struct fs_path_config android_dirs[] = {
136 { 00770, AID_SYSTEM, AID_CACHE, "cache" },
137 { 00771, AID_SYSTEM, AID_SYSTEM, "data/app" },
138 { 00771, AID_SYSTEM, AID_SYSTEM, "data/app-private" },
139 { 00771, AID_SYSTEM, AID_SYSTEM, "data/dalvik-cache" },
140 { 00771, AID_SYSTEM, AID_SYSTEM, "data/data" },
141 { 00771, AID_SHELL, AID_SHELL, "data/local/tmp" },
142 { 00771, AID_SHELL, AID_SHELL, "data/local" },
143 { 01771, AID_SYSTEM, AID_MISC, "data/misc" },
144 { 00770, AID_DHCP, AID_DHCP, "data/misc/dhcp" },
145 { 00771, AID_SYSTEM, AID_SYSTEM, "data" },
146 { 00750, AID_ROOT, AID_SHELL, "sbin" },
147 { 00755, AID_ROOT, AID_SHELL, "system/bin" },
148 { 00755, AID_ROOT, AID_SHELL, "system/vendor" },
149 { 00755, AID_ROOT, AID_SHELL, "system/xbin" },
150 { 00755, AID_ROOT, AID_ROOT, "system/etc/ppp" },
151 { 00777, AID_ROOT, AID_ROOT, "sdcard" },
152 { 00755, AID_ROOT, AID_ROOT, 0 },
153 };
154
155 /* Rules for files.
156 ** These rules are applied based on "first match", so they
157 ** should start with the most specific path and work their
158 ** way up to the root. Prefixes ending in * denotes wildcard
159 ** and will allow partial matches.
160 */
161 static struct fs_path_config android_files[] = {
162 { 00440, AID_ROOT, AID_SHELL, "system/etc/init.goldfish.rc" },
163 { 00550, AID_ROOT, AID_SHELL, "system/etc/init.goldfish.sh" },
164 { 00440, AID_ROOT, AID_SHELL, "system/etc/init.trout.rc" },
165 { 00550, AID_ROOT, AID_SHELL, "system/etc/init.ril" },
166 { 00550, AID_ROOT, AID_SHELL, "system/etc/init.testmenu" },
167 { 00550, AID_DHCP, AID_SHELL, "system/etc/dhcpcd/dhcpcd-run-hooks" },
168 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/dbus.conf" },
169 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/bluetooth/main.conf" },
170 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/bluetooth/input.conf" },
171 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/bluetooth/audio.conf" },
172 { 00444, AID_NET_BT, AID_NET_BT, "system/etc/bluetooth/blacklist.conf" },
173 { 00640, AID_SYSTEM, AID_SYSTEM, "system/etc/bluetooth/auto_pairing.conf" },
174 { 00444, AID_RADIO, AID_AUDIO, "system/etc/AudioPara4.csv" },
175 { 00555, AID_ROOT, AID_ROOT, "system/etc/ppp/*" },
176 { 00644, AID_SYSTEM, AID_SYSTEM, "data/app/*" },
177 { 00644, AID_SYSTEM, AID_SYSTEM, "data/app-private/*" },
178 { 00644, AID_APP, AID_APP, "data/data/*" },
179 /* the following two files are INTENTIONALLY set-gid and not set-uid.
180 * Do not change. */
181 { 02755, AID_ROOT, AID_NET_RAW, "system/bin/ping" },
182 { 02750, AID_ROOT, AID_INET, "system/bin/netcfg" },
183 /* the following five files are INTENTIONALLY set-uid, but they
184 * are NOT included on user builds. */
185 { 06755, AID_ROOT, AID_ROOT, "system/xbin/su" },
186 { 06755, AID_ROOT, AID_ROOT, "system/xbin/librank" },
187 { 06755, AID_ROOT, AID_ROOT, "system/xbin/procrank" },
188 { 06755, AID_ROOT, AID_ROOT, "system/xbin/procmem" },
189 { 06755, AID_ROOT, AID_ROOT, "system/xbin/tcpdump" },
190 { 04770, AID_ROOT, AID_RADIO, "system/bin/pppd-ril" },
191 /* the following file is INTENTIONALLY set-uid, and IS included
192 * in user builds. */
193 { 06750, AID_ROOT, AID_SHELL, "system/bin/run-as" },
194 { 00755, AID_ROOT, AID_SHELL, "system/bin/*" },
195 { 00755, AID_ROOT, AID_SHELL, "system/xbin/*" },
196 { 00755, AID_ROOT, AID_SHELL, "system/vendor/bin/*" },
197 { 00750, AID_ROOT, AID_SHELL, "sbin/*" },
198 { 00755, AID_ROOT, AID_ROOT, "bin/*" },
199 { 00750, AID_ROOT, AID_SHELL, "init*" },
200 { 00644, AID_ROOT, AID_ROOT, 0 },
201 };
202
fs_config(const char * path,int dir,unsigned * uid,unsigned * gid,unsigned * mode)203 static inline void fs_config(const char *path, int dir,
204 unsigned *uid, unsigned *gid, unsigned *mode)
205 {
206 struct fs_path_config *pc;
207 int plen;
208
209 pc = dir ? android_dirs : android_files;
210 plen = strlen(path);
211 for(; pc->prefix; pc++){
212 int len = strlen(pc->prefix);
213 if (dir) {
214 if(plen < len) continue;
215 if(!strncmp(pc->prefix, path, len)) break;
216 continue;
217 }
218 /* If name ends in * then allow partial matches. */
219 if (pc->prefix[len -1] == '*') {
220 if(!strncmp(pc->prefix, path, len - 1)) break;
221 } else if (plen == len){
222 if(!strncmp(pc->prefix, path, len)) break;
223 }
224 }
225 *uid = pc->uid;
226 *gid = pc->gid;
227 *mode = (*mode & (~07777)) | pc->mode;
228
229 #if 0
230 fprintf(stderr,"< '%s' '%s' %d %d %o >\n",
231 path, pc->prefix ? pc->prefix : "", *uid, *gid, *mode);
232 #endif
233 }
234 #endif
235 #endif
236