property_service.c revision 45fa13f370eb5b9215a3467a211f16b3c49f19e9
1dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* 2dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Copyright (C) 2007 The Android Open Source Project 3dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * 4dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 5dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * you may not use this file except in compliance with the License. 6dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * You may obtain a copy of the License at 7dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * 8dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 9dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * 10dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 11dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 12dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * See the License for the specific language governing permissions and 14dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * limitations under the License. 15dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 16dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 17dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <stdio.h> 18dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <stdlib.h> 19dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <unistd.h> 20dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <string.h> 21dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <ctype.h> 22dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <fcntl.h> 23dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <stdarg.h> 24dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <dirent.h> 25dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <limits.h> 26dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <errno.h> 27dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 28dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <cutils/misc.h> 29dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <cutils/sockets.h> 30dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 31dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_ 32dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <sys/_system_properties.h> 33dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 34dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <sys/socket.h> 35dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <sys/un.h> 36dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <sys/select.h> 37dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <sys/types.h> 38dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <netinet/in.h> 39dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <sys/mman.h> 40dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <sys/atomics.h> 41dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <private/android_filesystem_config.h> 42dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 43dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include "property_service.h" 44dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include "init.h" 453899e9fc01cf608f19f716749c54cc5c4d17e766Colin Cross#include "util.h" 46ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross#include "log.h" 47dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 48dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define PERSISTENT_PROPERTY_DIR "/data/property" 49dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 50dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic int persistent_properties_loaded = 0; 513294bbbad9494eb4ca534624b96e39f8ed15aaf2Colin Crossstatic int property_area_inited = 0; 52dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 53d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Crossstatic int property_set_fd = -1; 54d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Cross 55dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* White list of permissions for setting property services. */ 56dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstruct { 57dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project const char *prefix; 58dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project unsigned int uid; 59c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood unsigned int gid; 60dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} property_perms[] = { 61c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "net.rmnet0.", AID_RADIO, 0 }, 62c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "net.gprs.", AID_RADIO, 0 }, 63c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "net.ppp", AID_RADIO, 0 }, 64cf01597121c1c08780966f22e2a62386d0e1a08fAmol Bhatkar { "net.qmi", AID_RADIO, 0 }, 657100f640deabb9e746e41eac54707f1ca531f2dbBenoit Goby { "net.lte", AID_RADIO, 0 }, 6622bfc4cca03197036c3b49e7c2cf47a0a23fce87Benoit Goby { "net.cdma", AID_RADIO, 0 }, 67c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "ril.", AID_RADIO, 0 }, 68c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "gsm.", AID_RADIO, 0 }, 69c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "persist.radio", AID_RADIO, 0 }, 70c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "net.dns", AID_RADIO, 0 }, 715da93589f106646203d6633e2e927aba01fbdb9fBenoit Goby { "sys.usb.config", AID_RADIO, 0 }, 72c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "net.", AID_SYSTEM, 0 }, 73c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "dev.", AID_SYSTEM, 0 }, 74c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "runtime.", AID_SYSTEM, 0 }, 75c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "hw.", AID_SYSTEM, 0 }, 76c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "sys.", AID_SYSTEM, 0 }, 77c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "service.", AID_SYSTEM, 0 }, 78c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "wlan.", AID_SYSTEM, 0 }, 79c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "dhcp.", AID_SYSTEM, 0 }, 80c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "dhcp.", AID_DHCP, 0 }, 8145fa13f370eb5b9215a3467a211f16b3c49f19e9Romain Guy { "debug.", AID_SYSTEM, 0 }, 82c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "debug.", AID_SHELL, 0 }, 83c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "log.", AID_SHELL, 0 }, 84c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "service.adb.root", AID_SHELL, 0 }, 8558aa5b0ee0ec67d4e0f3b12e27cd58279bef0deeMike Lockwood { "service.adb.tcp.port", AID_SHELL, 0 }, 86c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "persist.sys.", AID_SYSTEM, 0 }, 87c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "persist.service.", AID_SYSTEM, 0 }, 88ef4e21520cef69aaa7b488a3f44b2490dc2e3eb5Oscar Montemayor { "persist.security.", AID_SYSTEM, 0 }, 89c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { NULL, 0, 0 } 90dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project}; 91dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 92dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* 93dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * White list of UID that are allowed to start/stop services. 94dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Currently there are no user apps that require. 95dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 96dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstruct { 97dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project const char *service; 98dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project unsigned int uid; 99c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood unsigned int gid; 100dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} control_perms[] = { 101c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "dumpstate",AID_SHELL, AID_LOG }, 102cfa0d8439384a1aaa53d31fb720c234cabf796eeWink Saville { "ril-daemon",AID_RADIO, AID_RADIO }, 103c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood {NULL, 0, 0 } 104dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project}; 105dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 106dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projecttypedef struct { 107dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project void *data; 108dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project size_t size; 109dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int fd; 110dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} workspace; 111dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 112dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic int init_workspace(workspace *w, size_t size) 113dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 114dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project void *data; 115dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int fd; 116dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 11725b15be9120bcdaa0aba622c67ad2c835d9e91caBrian Swetland /* dev is a tmpfs that we can use to carve a shared workspace 11825b15be9120bcdaa0aba622c67ad2c835d9e91caBrian Swetland * out of, so let's do that... 11925b15be9120bcdaa0aba622c67ad2c835d9e91caBrian Swetland */ 12025b15be9120bcdaa0aba622c67ad2c835d9e91caBrian Swetland fd = open("/dev/__properties__", O_RDWR | O_CREAT, 0600); 12125b15be9120bcdaa0aba622c67ad2c835d9e91caBrian Swetland if (fd < 0) 122dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return -1; 123dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 12425b15be9120bcdaa0aba622c67ad2c835d9e91caBrian Swetland if (ftruncate(fd, size) < 0) 12525b15be9120bcdaa0aba622c67ad2c835d9e91caBrian Swetland goto out; 12625b15be9120bcdaa0aba622c67ad2c835d9e91caBrian Swetland 127dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 128dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(data == MAP_FAILED) 129dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project goto out; 130dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 13125b15be9120bcdaa0aba622c67ad2c835d9e91caBrian Swetland close(fd); 13225b15be9120bcdaa0aba622c67ad2c835d9e91caBrian Swetland 13325b15be9120bcdaa0aba622c67ad2c835d9e91caBrian Swetland fd = open("/dev/__properties__", O_RDONLY); 13425b15be9120bcdaa0aba622c67ad2c835d9e91caBrian Swetland if (fd < 0) 13525b15be9120bcdaa0aba622c67ad2c835d9e91caBrian Swetland return -1; 13625b15be9120bcdaa0aba622c67ad2c835d9e91caBrian Swetland 13725b15be9120bcdaa0aba622c67ad2c835d9e91caBrian Swetland unlink("/dev/__properties__"); 138dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 139dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project w->data = data; 140dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project w->size = size; 141dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project w->fd = fd; 142dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 0; 143dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 144dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectout: 145dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project close(fd); 146dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return -1; 147dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 148dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 149dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* (8 header words + 247 toc words) = 1020 bytes */ 150dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* 1024 bytes header and toc + 247 prop_infos @ 128 bytes = 32640 bytes */ 151dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 152dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define PA_COUNT_MAX 247 153dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define PA_INFO_START 1024 154dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define PA_SIZE 32768 155dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 156dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic workspace pa_workspace; 157dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic prop_info *pa_info_array; 158dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 159dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectextern prop_area *__system_property_area__; 160dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 161dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic int init_property_area(void) 162dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 163dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project prop_area *pa; 164dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 165dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(pa_info_array) 166dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return -1; 167dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 168dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(init_workspace(&pa_workspace, PA_SIZE)) 169dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return -1; 170dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 171dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fcntl(pa_workspace.fd, F_SETFD, FD_CLOEXEC); 172dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 173dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pa_info_array = (void*) (((char*) pa_workspace.data) + PA_INFO_START); 174dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 175dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pa = pa_workspace.data; 176dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project memset(pa, 0, PA_SIZE); 177dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pa->magic = PROP_AREA_MAGIC; 178dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pa->version = PROP_AREA_VERSION; 179dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 180dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* plug into the lib property services */ 181dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project __system_property_area__ = pa; 1823294bbbad9494eb4ca534624b96e39f8ed15aaf2Colin Cross property_area_inited = 1; 183dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 0; 184dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 185dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 186dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic void update_prop_info(prop_info *pi, const char *value, unsigned len) 187dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 188dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pi->serial = pi->serial | 1; 189dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project memcpy(pi->value, value, len + 1); 190dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pi->serial = (len << 24) | ((pi->serial + 1) & 0xffffff); 191dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project __futex_wake(&pi->serial, INT32_MAX); 192dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 193dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 194dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* 195dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Checks permissions for starting/stoping system services. 196dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * AID_SYSTEM and AID_ROOT are always allowed. 197dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * 198dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Returns 1 if uid allowed, 0 otherwise. 199dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 200d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Crossstatic int check_control_perms(const char *name, unsigned int uid, unsigned int gid) { 201dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int i; 202dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (uid == AID_SYSTEM || uid == AID_ROOT) 203dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 1; 204dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 205dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* Search the ACL */ 206dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project for (i = 0; control_perms[i].service; i++) { 207dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (strcmp(control_perms[i].service, name) == 0) { 208c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood if ((uid && control_perms[i].uid == uid) || 209c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood (gid && control_perms[i].gid == gid)) { 210dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 1; 211c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood } 212dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 213dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 214dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 0; 215dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 216dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 217dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* 218dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Checks permissions for setting system properties. 219dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Returns 1 if uid allowed, 0 otherwise. 220dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 221d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Crossstatic int check_perms(const char *name, unsigned int uid, unsigned int gid) 222dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 223dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int i; 224dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (uid == 0) 225dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 1; 226dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 227dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(!strncmp(name, "ro.", 3)) 228dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project name +=3; 229dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 230dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project for (i = 0; property_perms[i].prefix; i++) { 231dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int tmp; 232dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (strncmp(property_perms[i].prefix, name, 233dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project strlen(property_perms[i].prefix)) == 0) { 234c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood if ((uid && property_perms[i].uid == uid) || 235c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood (gid && property_perms[i].gid == gid)) { 236dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 1; 237dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 238dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 239dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 240dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 241dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 0; 242dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 243dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 244dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectconst char* property_get(const char *name) 245dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 246dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project prop_info *pi; 247dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 248dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(strlen(name) >= PROP_NAME_MAX) return 0; 249dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 250dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pi = (prop_info*) __system_property_find(name); 251dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 252dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(pi != 0) { 253dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return pi->value; 254dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 255dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 0; 256dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 257dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 258dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 2593dfe6c66646865a78449a435239145deeaeab3baTammo Spalinkstatic void write_persistent_property(const char *name, const char *value) 260dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 261dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project const char *tempPath = PERSISTENT_PROPERTY_DIR "/.temp"; 262dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char path[PATH_MAX]; 263dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int fd, length; 264dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 265dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project snprintf(path, sizeof(path), "%s/%s", PERSISTENT_PROPERTY_DIR, name); 266dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 267dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fd = open(tempPath, O_WRONLY|O_CREAT|O_TRUNC, 0600); 268dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (fd < 0) { 269dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ERROR("Unable to write persistent property to temp file %s errno: %d\n", tempPath, errno); 2703dfe6c66646865a78449a435239145deeaeab3baTammo Spalink return; 271dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 272dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project write(fd, value, strlen(value)); 273dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project close(fd); 274dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 275dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (rename(tempPath, path)) { 276dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project unlink(tempPath); 277dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ERROR("Unable to rename persistent property file %s to %s\n", tempPath, path); 278dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 279dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 280dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 281dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectint property_set(const char *name, const char *value) 282dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 283dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project prop_area *pa; 284dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project prop_info *pi; 285dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 286dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int namelen = strlen(name); 287dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int valuelen = strlen(value); 288dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 289dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(namelen >= PROP_NAME_MAX) return -1; 290dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(valuelen >= PROP_VALUE_MAX) return -1; 291dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(namelen < 1) return -1; 292dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 293dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pi = (prop_info*) __system_property_find(name); 294dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 295dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(pi != 0) { 296dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* ro.* properties may NEVER be modified once set */ 297dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(!strncmp(name, "ro.", 3)) return -1; 298dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 299dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pa = __system_property_area__; 300dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project update_prop_info(pi, value, valuelen); 301dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pa->serial++; 302dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project __futex_wake(&pa->serial, INT32_MAX); 303dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 304dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pa = __system_property_area__; 305dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(pa->count == PA_COUNT_MAX) return -1; 306dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 307dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pi = pa_info_array + pa->count; 308dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pi->serial = (valuelen << 24); 309dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project memcpy(pi->name, name, namelen + 1); 310dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project memcpy(pi->value, value, valuelen + 1); 311dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 312dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pa->toc[pa->count] = 313dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project (namelen << 24) | (((unsigned) pi) - ((unsigned) pa)); 314dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 315dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pa->count++; 316dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pa->serial++; 317dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project __futex_wake(&pa->serial, INT32_MAX); 318dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 319dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* If name starts with "net." treat as a DNS property. */ 320b3779558dcfbe99f0b9c1ef796e3728edad25672Mike Lockwood if (strncmp("net.", name, strlen("net.")) == 0) { 321dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (strcmp("net.change", name) == 0) { 322dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 0; 323dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 3243dfe6c66646865a78449a435239145deeaeab3baTammo Spalink /* 325dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * The 'net.change' property is a special property used track when any 326dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * 'net.*' property name is updated. It is _ONLY_ updated here. Its value 327dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * contains the last updated 'net.*' property. 328dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 329dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project property_set("net.change", name); 330dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else if (persistent_properties_loaded && 331b3779558dcfbe99f0b9c1ef796e3728edad25672Mike Lockwood strncmp("persist.", name, strlen("persist.")) == 0) { 3323dfe6c66646865a78449a435239145deeaeab3baTammo Spalink /* 333dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Don't write properties to disk until after we have read all default properties 334dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * to prevent them from being overwritten by default values. 335dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 3363dfe6c66646865a78449a435239145deeaeab3baTammo Spalink write_persistent_property(name, value); 337dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 338dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project property_changed(name, value); 339dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 0; 340dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 341dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 342d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Crossvoid handle_property_set_fd() 343dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 344dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project prop_msg msg; 345dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int s; 346dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int r; 347dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int res; 348dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project struct ucred cr; 349dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project struct sockaddr_un addr; 350dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project socklen_t addr_size = sizeof(addr); 351dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project socklen_t cr_size = sizeof(cr); 352dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 353d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Cross if ((s = accept(property_set_fd, (struct sockaddr *) &addr, &addr_size)) < 0) { 354dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return; 355dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 356dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 357dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* Check socket options here */ 358dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (getsockopt(s, SOL_SOCKET, SO_PEERCRED, &cr, &cr_size) < 0) { 359dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project close(s); 360dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ERROR("Unable to recieve socket options\n"); 361dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return; 362dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 363dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 364d18678f882eed5677c28d03a86a8ab43300acd4eMike Lockwood r = TEMP_FAILURE_RETRY(recv(s, &msg, sizeof(msg), 0)); 365dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(r != sizeof(prop_msg)) { 366d18678f882eed5677c28d03a86a8ab43300acd4eMike Lockwood ERROR("sys_prop: mis-match msg size recieved: %d expected: %d errno: %d\n", 367d18678f882eed5677c28d03a86a8ab43300acd4eMike Lockwood r, sizeof(prop_msg), errno); 3689f1e0e3ae3108086948b74ce58af32df92ff8331Brad Fitzpatrick close(s); 369dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return; 370dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 371dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 372dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project switch(msg.cmd) { 373dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project case PROP_MSG_SETPROP: 374dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project msg.name[PROP_NAME_MAX-1] = 0; 375dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project msg.value[PROP_VALUE_MAX-1] = 0; 376dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 377dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(memcmp(msg.name,"ctl.",4) == 0) { 37871ead1835317af5305f9ef87ce06ebdf9cff92e6Brad Fitzpatrick // Keep the old close-socket-early behavior when handling 37971ead1835317af5305f9ef87ce06ebdf9cff92e6Brad Fitzpatrick // ctl.* properties. 38071ead1835317af5305f9ef87ce06ebdf9cff92e6Brad Fitzpatrick close(s); 381c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood if (check_control_perms(msg.value, cr.uid, cr.gid)) { 382dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project handle_control_message((char*) msg.name + 4, (char*) msg.value); 383dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 384cfa0d8439384a1aaa53d31fb720c234cabf796eeWink Saville ERROR("sys_prop: Unable to %s service ctl [%s] uid:%d gid:%d pid:%d\n", 385cfa0d8439384a1aaa53d31fb720c234cabf796eeWink Saville msg.name + 4, msg.value, cr.uid, cr.gid, cr.pid); 386dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 387dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 388c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood if (check_perms(msg.name, cr.uid, cr.gid)) { 389dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project property_set((char*) msg.name, (char*) msg.value); 390dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 391dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ERROR("sys_prop: permission denied uid:%d name:%s\n", 392dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project cr.uid, msg.name); 393dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 39471ead1835317af5305f9ef87ce06ebdf9cff92e6Brad Fitzpatrick 39571ead1835317af5305f9ef87ce06ebdf9cff92e6Brad Fitzpatrick // Note: bionic's property client code assumes that the 39671ead1835317af5305f9ef87ce06ebdf9cff92e6Brad Fitzpatrick // property server will not close the socket until *AFTER* 39771ead1835317af5305f9ef87ce06ebdf9cff92e6Brad Fitzpatrick // the property is written to memory. 39871ead1835317af5305f9ef87ce06ebdf9cff92e6Brad Fitzpatrick close(s); 399dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 400dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project break; 401dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 402dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project default: 40371ead1835317af5305f9ef87ce06ebdf9cff92e6Brad Fitzpatrick close(s); 404dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project break; 405dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 406dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 407dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 408dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectvoid get_property_workspace(int *fd, int *sz) 409dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 410dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *fd = pa_workspace.fd; 411dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *sz = pa_workspace.size; 412dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 413dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 414dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic void load_properties(char *data) 415dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 416dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char *key, *value, *eol, *sol, *tmp; 417dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 418dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project sol = data; 419dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while((eol = strchr(sol, '\n'))) { 420dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project key = sol; 421dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *eol++ = 0; 422dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project sol = eol; 423dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 424dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project value = strchr(key, '='); 425dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(value == 0) continue; 426dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *value++ = 0; 427dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 428dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while(isspace(*key)) key++; 429dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(*key == '#') continue; 430dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project tmp = value - 2; 431dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while((tmp > key) && isspace(*tmp)) *tmp-- = 0; 432dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 433dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while(isspace(*value)) value++; 434dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project tmp = eol - 2; 435dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while((tmp > value) && isspace(*tmp)) *tmp-- = 0; 436dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 437dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project property_set(key, value); 438dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 439dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 440dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 441dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic void load_properties_from_file(const char *fn) 442dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 443dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char *data; 444dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project unsigned sz; 445dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 446dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project data = read_file(fn, &sz); 447dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 448dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(data != 0) { 449dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project load_properties(data); 450dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project free(data); 451dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 452dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 453dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 454dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic void load_persistent_properties() 455dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 456dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project DIR* dir = opendir(PERSISTENT_PROPERTY_DIR); 457dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project struct dirent* entry; 458dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char path[PATH_MAX]; 459dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char value[PROP_VALUE_MAX]; 460dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int fd, length; 461dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 462dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (dir) { 463dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while ((entry = readdir(dir)) != NULL) { 464b3779558dcfbe99f0b9c1ef796e3728edad25672Mike Lockwood if (strncmp("persist.", entry->d_name, strlen("persist."))) 465dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project continue; 466dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#if HAVE_DIRENT_D_TYPE 467dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (entry->d_type != DT_REG) 468dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project continue; 469dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#endif 470dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* open the file and read the property value */ 471dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project snprintf(path, sizeof(path), "%s/%s", PERSISTENT_PROPERTY_DIR, entry->d_name); 472dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fd = open(path, O_RDONLY); 473dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (fd >= 0) { 474dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project length = read(fd, value, sizeof(value) - 1); 475dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (length >= 0) { 476dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project value[length] = 0; 477dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project property_set(entry->d_name, value); 478dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 479dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ERROR("Unable to read persistent property file %s errno: %d\n", path, errno); 480dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 481dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project close(fd); 482dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 483dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ERROR("Unable to open persistent property file %s errno: %d\n", path, errno); 484dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 485dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 486dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project closedir(dir); 487dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 488dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ERROR("Unable to open persistent property directory %s errno: %d\n", PERSISTENT_PROPERTY_DIR, errno); 489dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 4903dfe6c66646865a78449a435239145deeaeab3baTammo Spalink 491dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project persistent_properties_loaded = 1; 492dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 493dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 4948886112d87bcc501e89e4763656a3ebfeb58edf2Dima Zavinvoid property_init(void) 495dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 496dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project init_property_area(); 4978886112d87bcc501e89e4763656a3ebfeb58edf2Dima Zavin} 4988886112d87bcc501e89e4763656a3ebfeb58edf2Dima Zavin 4998886112d87bcc501e89e4763656a3ebfeb58edf2Dima Zavinvoid property_load_boot_defaults(void) 5008886112d87bcc501e89e4763656a3ebfeb58edf2Dima Zavin{ 5018886112d87bcc501e89e4763656a3ebfeb58edf2Dima Zavin load_properties_from_file(PROP_PATH_RAMDISK_DEFAULT); 502dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 503dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 5043294bbbad9494eb4ca534624b96e39f8ed15aaf2Colin Crossint properties_inited(void) 5053294bbbad9494eb4ca534624b96e39f8ed15aaf2Colin Cross{ 5063294bbbad9494eb4ca534624b96e39f8ed15aaf2Colin Cross return property_area_inited; 5073294bbbad9494eb4ca534624b96e39f8ed15aaf2Colin Cross} 5083294bbbad9494eb4ca534624b96e39f8ed15aaf2Colin Cross 509c5c51033c86353d1a448c72e0e9388906eed7114Ken Sumrall/* When booting an encrypted system, /data is not mounted when the 510c5c51033c86353d1a448c72e0e9388906eed7114Ken Sumrall * property service is started, so any properties stored there are 511c5c51033c86353d1a448c72e0e9388906eed7114Ken Sumrall * not loaded. Vold triggers init to load these properties once it 512c5c51033c86353d1a448c72e0e9388906eed7114Ken Sumrall * has mounted /data. 513c5c51033c86353d1a448c72e0e9388906eed7114Ken Sumrall */ 514c5c51033c86353d1a448c72e0e9388906eed7114Ken Sumrallvoid load_persist_props(void) 515c5c51033c86353d1a448c72e0e9388906eed7114Ken Sumrall{ 5160dbda7e1c5bcebc501b4943cd6483122297e1834Nick Kralevich#ifdef ALLOW_LOCAL_PROP_OVERRIDE 517c5c51033c86353d1a448c72e0e9388906eed7114Ken Sumrall load_properties_from_file(PROP_PATH_LOCAL_OVERRIDE); 5180dbda7e1c5bcebc501b4943cd6483122297e1834Nick Kralevich#endif /* ALLOW_LOCAL_PROP_OVERRIDE */ 519c5c51033c86353d1a448c72e0e9388906eed7114Ken Sumrall /* Read persistent properties after all default values have been loaded. */ 520c5c51033c86353d1a448c72e0e9388906eed7114Ken Sumrall load_persistent_properties(); 521c5c51033c86353d1a448c72e0e9388906eed7114Ken Sumrall} 522c5c51033c86353d1a448c72e0e9388906eed7114Ken Sumrall 523d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Crossvoid start_property_service(void) 524dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 525dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int fd; 526dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 527dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project load_properties_from_file(PROP_PATH_SYSTEM_BUILD); 528dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project load_properties_from_file(PROP_PATH_SYSTEM_DEFAULT); 5290dbda7e1c5bcebc501b4943cd6483122297e1834Nick Kralevich#ifdef ALLOW_LOCAL_PROP_OVERRIDE 530dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project load_properties_from_file(PROP_PATH_LOCAL_OVERRIDE); 5310dbda7e1c5bcebc501b4943cd6483122297e1834Nick Kralevich#endif /* ALLOW_LOCAL_PROP_OVERRIDE */ 532dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* Read persistent properties after all default values have been loaded. */ 533dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project load_persistent_properties(); 534dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 535dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fd = create_socket(PROP_SERVICE_NAME, SOCK_STREAM, 0666, 0, 0); 536d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Cross if(fd < 0) return; 537dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fcntl(fd, F_SETFD, FD_CLOEXEC); 538dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fcntl(fd, F_SETFL, O_NONBLOCK); 539dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 540dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project listen(fd, 8); 541d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Cross property_set_fd = fd; 542d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Cross} 543d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Cross 544d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Crossint get_property_set_fd() 545d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Cross{ 546d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Cross return property_set_fd; 547dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 548