property_service.c revision 3294bbbad9494eb4ca534624b96e39f8ed15aaf2
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#include <cutils/ashmem.h> 31dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 32dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_ 33dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <sys/_system_properties.h> 34dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 35dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <sys/socket.h> 36dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <sys/un.h> 37dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <sys/select.h> 38dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <sys/types.h> 39dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <netinet/in.h> 40dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <sys/mman.h> 41dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <sys/atomics.h> 42dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include <private/android_filesystem_config.h> 43dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 44dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include "property_service.h" 45dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#include "init.h" 463899e9fc01cf608f19f716749c54cc5c4d17e766Colin Cross#include "util.h" 47ed8a7d84428ec945c48b6b53dc5a3a18fabaf683Colin Cross#include "log.h" 48dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 49dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define PERSISTENT_PROPERTY_DIR "/data/property" 50dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 51dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic int persistent_properties_loaded = 0; 523294bbbad9494eb4ca534624b96e39f8ed15aaf2Colin Crossstatic int property_area_inited = 0; 53dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 54d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Crossstatic int property_set_fd = -1; 55d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Cross 56dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* White list of permissions for setting property services. */ 57dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstruct { 58dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project const char *prefix; 59dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project unsigned int uid; 60c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood unsigned int gid; 61dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} property_perms[] = { 62c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "net.rmnet0.", AID_RADIO, 0 }, 63c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "net.gprs.", AID_RADIO, 0 }, 64c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "net.ppp", AID_RADIO, 0 }, 65c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "ril.", AID_RADIO, 0 }, 66c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "gsm.", AID_RADIO, 0 }, 67c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "persist.radio", AID_RADIO, 0 }, 68c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "net.dns", AID_RADIO, 0 }, 69c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "net.", AID_SYSTEM, 0 }, 70c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "dev.", AID_SYSTEM, 0 }, 71c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "runtime.", AID_SYSTEM, 0 }, 72c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "hw.", AID_SYSTEM, 0 }, 73c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "sys.", AID_SYSTEM, 0 }, 74c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "service.", AID_SYSTEM, 0 }, 75c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "wlan.", AID_SYSTEM, 0 }, 76c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "dhcp.", AID_SYSTEM, 0 }, 77c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "dhcp.", AID_DHCP, 0 }, 78c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "vpn.", AID_SYSTEM, 0 }, 79c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "vpn.", AID_VPN, 0 }, 80c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "debug.", AID_SHELL, 0 }, 81c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "log.", AID_SHELL, 0 }, 82c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "service.adb.root", AID_SHELL, 0 }, 83c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "persist.sys.", AID_SYSTEM, 0 }, 84c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "persist.service.", AID_SYSTEM, 0 }, 85ef4e21520cef69aaa7b488a3f44b2490dc2e3eb5Oscar Montemayor { "persist.security.", AID_SYSTEM, 0 }, 86c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { NULL, 0, 0 } 87dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project}; 88dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 89dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* 90dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * White list of UID that are allowed to start/stop services. 91dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Currently there are no user apps that require. 92dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 93dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstruct { 94dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project const char *service; 95dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project unsigned int uid; 96c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood unsigned int gid; 97dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} control_perms[] = { 98c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood { "dumpstate",AID_SHELL, AID_LOG }, 99c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood {NULL, 0, 0 } 100dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project}; 101dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 102dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projecttypedef struct { 103dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project void *data; 104dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project size_t size; 105dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int fd; 106dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} workspace; 107dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 108dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic int init_workspace(workspace *w, size_t size) 109dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 110dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project void *data; 111dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int fd; 112dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 113dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fd = ashmem_create_region("system_properties", size); 114dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(fd < 0) 115dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return -1; 116dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 117dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 118dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(data == MAP_FAILED) 119dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project goto out; 120dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 121dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* allow the wolves we share with to do nothing but read */ 122dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ashmem_set_prot_region(fd, PROT_READ); 123dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 124dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project w->data = data; 125dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project w->size = size; 126dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project w->fd = fd; 127dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 128dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 0; 129dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 130dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectout: 131dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project close(fd); 132dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return -1; 133dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 134dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 135dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* (8 header words + 247 toc words) = 1020 bytes */ 136dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* 1024 bytes header and toc + 247 prop_infos @ 128 bytes = 32640 bytes */ 137dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 138dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define PA_COUNT_MAX 247 139dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define PA_INFO_START 1024 140dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#define PA_SIZE 32768 141dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 142dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic workspace pa_workspace; 143dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic prop_info *pa_info_array; 144dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 145dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectextern prop_area *__system_property_area__; 146dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 147dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic int init_property_area(void) 148dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 149dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project prop_area *pa; 150dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 151dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(pa_info_array) 152dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return -1; 153dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 154dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(init_workspace(&pa_workspace, PA_SIZE)) 155dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return -1; 156dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 157dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fcntl(pa_workspace.fd, F_SETFD, FD_CLOEXEC); 158dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 159dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pa_info_array = (void*) (((char*) pa_workspace.data) + PA_INFO_START); 160dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 161dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pa = pa_workspace.data; 162dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project memset(pa, 0, PA_SIZE); 163dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pa->magic = PROP_AREA_MAGIC; 164dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pa->version = PROP_AREA_VERSION; 165dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 166dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* plug into the lib property services */ 167dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project __system_property_area__ = pa; 1683294bbbad9494eb4ca534624b96e39f8ed15aaf2Colin Cross property_area_inited = 1; 169dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 0; 170dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 171dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 172dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic void update_prop_info(prop_info *pi, const char *value, unsigned len) 173dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 174dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pi->serial = pi->serial | 1; 175dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project memcpy(pi->value, value, len + 1); 176dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pi->serial = (len << 24) | ((pi->serial + 1) & 0xffffff); 177dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project __futex_wake(&pi->serial, INT32_MAX); 178dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 179dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 180dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic int property_write(prop_info *pi, const char *value) 181dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 182dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int valuelen = strlen(value); 183dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(valuelen >= PROP_VALUE_MAX) return -1; 184dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project update_prop_info(pi, value, valuelen); 185dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 0; 186dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 187dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 188dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 189dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* 190dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Checks permissions for starting/stoping system services. 191dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * AID_SYSTEM and AID_ROOT are always allowed. 192dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * 193dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Returns 1 if uid allowed, 0 otherwise. 194dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 195d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Crossstatic int check_control_perms(const char *name, unsigned int uid, unsigned int gid) { 196dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int i; 197dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (uid == AID_SYSTEM || uid == AID_ROOT) 198dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 1; 199dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 200dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* Search the ACL */ 201dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project for (i = 0; control_perms[i].service; i++) { 202dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (strcmp(control_perms[i].service, name) == 0) { 203c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood if ((uid && control_perms[i].uid == uid) || 204c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood (gid && control_perms[i].gid == gid)) { 205dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 1; 206c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood } 207dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 208dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 209dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 0; 210dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 211dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 212dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project/* 213dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Checks permissions for setting system properties. 214dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Returns 1 if uid allowed, 0 otherwise. 215dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 216d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Crossstatic int check_perms(const char *name, unsigned int uid, unsigned int gid) 217dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 218dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int i; 219dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (uid == 0) 220dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 1; 221dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 222dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(!strncmp(name, "ro.", 3)) 223dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project name +=3; 224dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 225dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project for (i = 0; property_perms[i].prefix; i++) { 226dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int tmp; 227dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (strncmp(property_perms[i].prefix, name, 228dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project strlen(property_perms[i].prefix)) == 0) { 229c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood if ((uid && property_perms[i].uid == uid) || 230c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood (gid && property_perms[i].gid == gid)) { 231dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 1; 232dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 233dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 234dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 235dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 236dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 0; 237dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 238dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 239dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectconst char* property_get(const char *name) 240dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 241dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project prop_info *pi; 242dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 243dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(strlen(name) >= PROP_NAME_MAX) return 0; 244dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 245dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pi = (prop_info*) __system_property_find(name); 246dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 247dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(pi != 0) { 248dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return pi->value; 249dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 250dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 0; 251dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 252dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 253dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 2543dfe6c66646865a78449a435239145deeaeab3baTammo Spalinkstatic void write_persistent_property(const char *name, const char *value) 255dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 256dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project const char *tempPath = PERSISTENT_PROPERTY_DIR "/.temp"; 257dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char path[PATH_MAX]; 258dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int fd, length; 259dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 260dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project snprintf(path, sizeof(path), "%s/%s", PERSISTENT_PROPERTY_DIR, name); 261dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 262dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fd = open(tempPath, O_WRONLY|O_CREAT|O_TRUNC, 0600); 263dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (fd < 0) { 264dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ERROR("Unable to write persistent property to temp file %s errno: %d\n", tempPath, errno); 2653dfe6c66646865a78449a435239145deeaeab3baTammo Spalink return; 266dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 267dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project write(fd, value, strlen(value)); 268dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project close(fd); 269dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 270dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (rename(tempPath, path)) { 271dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project unlink(tempPath); 272dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ERROR("Unable to rename persistent property file %s to %s\n", tempPath, path); 273dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 274dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 275dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 276dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectint property_set(const char *name, const char *value) 277dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 278dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project prop_area *pa; 279dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project prop_info *pi; 280dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 281dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int namelen = strlen(name); 282dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int valuelen = strlen(value); 283dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 284dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(namelen >= PROP_NAME_MAX) return -1; 285dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(valuelen >= PROP_VALUE_MAX) return -1; 286dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(namelen < 1) return -1; 287dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 288dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pi = (prop_info*) __system_property_find(name); 289dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 290dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(pi != 0) { 291dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* ro.* properties may NEVER be modified once set */ 292dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(!strncmp(name, "ro.", 3)) return -1; 293dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 294dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pa = __system_property_area__; 295dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project update_prop_info(pi, value, valuelen); 296dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pa->serial++; 297dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project __futex_wake(&pa->serial, INT32_MAX); 298dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 299dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pa = __system_property_area__; 300dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(pa->count == PA_COUNT_MAX) return -1; 301dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 302dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pi = pa_info_array + pa->count; 303dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pi->serial = (valuelen << 24); 304dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project memcpy(pi->name, name, namelen + 1); 305dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project memcpy(pi->value, value, valuelen + 1); 306dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 307dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pa->toc[pa->count] = 308dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project (namelen << 24) | (((unsigned) pi) - ((unsigned) pa)); 309dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 310dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pa->count++; 311dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project pa->serial++; 312dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project __futex_wake(&pa->serial, INT32_MAX); 313dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 314dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* If name starts with "net." treat as a DNS property. */ 315b3779558dcfbe99f0b9c1ef796e3728edad25672Mike Lockwood if (strncmp("net.", name, strlen("net.")) == 0) { 316dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (strcmp("net.change", name) == 0) { 317dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 0; 318dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 3193dfe6c66646865a78449a435239145deeaeab3baTammo Spalink /* 320dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * The 'net.change' property is a special property used track when any 321dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * 'net.*' property name is updated. It is _ONLY_ updated here. Its value 322dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * contains the last updated 'net.*' property. 323dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 324dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project property_set("net.change", name); 325dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else if (persistent_properties_loaded && 326b3779558dcfbe99f0b9c1ef796e3728edad25672Mike Lockwood strncmp("persist.", name, strlen("persist.")) == 0) { 3273dfe6c66646865a78449a435239145deeaeab3baTammo Spalink /* 328dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * Don't write properties to disk until after we have read all default properties 329dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project * to prevent them from being overwritten by default values. 330dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project */ 3313dfe6c66646865a78449a435239145deeaeab3baTammo Spalink write_persistent_property(name, value); 332dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 333dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project property_changed(name, value); 334dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 0; 335dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 336dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 337dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic int property_list(void (*propfn)(const char *key, const char *value, void *cookie), 338dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project void *cookie) 339dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 340dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char name[PROP_NAME_MAX]; 341dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char value[PROP_VALUE_MAX]; 342dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project const prop_info *pi; 343dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project unsigned n; 344dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 345dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project for(n = 0; (pi = __system_property_find_nth(n)); n++) { 346dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project __system_property_read(pi, name, value); 347dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project propfn(name, value, cookie); 348dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 349dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return 0; 350dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 351dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 352d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Crossvoid handle_property_set_fd() 353dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 354dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project prop_msg msg; 355dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int s; 356dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int r; 357dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int res; 358dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project struct ucred cr; 359dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project struct sockaddr_un addr; 360dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project socklen_t addr_size = sizeof(addr); 361dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project socklen_t cr_size = sizeof(cr); 362dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 363d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Cross if ((s = accept(property_set_fd, (struct sockaddr *) &addr, &addr_size)) < 0) { 364dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return; 365dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 366dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 367dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* Check socket options here */ 368dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (getsockopt(s, SOL_SOCKET, SO_PEERCRED, &cr, &cr_size) < 0) { 369dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project close(s); 370dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ERROR("Unable to recieve socket options\n"); 371dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return; 372dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 373dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 374dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project r = recv(s, &msg, sizeof(msg), 0); 375dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project close(s); 376dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(r != sizeof(prop_msg)) { 377dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ERROR("sys_prop: mis-match msg size recieved: %d expected: %d\n", 378dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project r, sizeof(prop_msg)); 379dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project return; 380dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 381dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 382dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project switch(msg.cmd) { 383dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project case PROP_MSG_SETPROP: 384dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project msg.name[PROP_NAME_MAX-1] = 0; 385dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project msg.value[PROP_VALUE_MAX-1] = 0; 386dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 387dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(memcmp(msg.name,"ctl.",4) == 0) { 388c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood if (check_control_perms(msg.value, cr.uid, cr.gid)) { 389dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project handle_control_message((char*) msg.name + 4, (char*) msg.value); 390dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 391dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ERROR("sys_prop: Unable to %s service ctl [%s] uid: %d pid:%d\n", 392dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project msg.name + 4, msg.value, cr.uid, cr.pid); 393dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 394dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 395c5e7ef24308f5a993ecfd5ac438d347e786f5e42Mike Lockwood if (check_perms(msg.name, cr.uid, cr.gid)) { 396dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project property_set((char*) msg.name, (char*) msg.value); 397dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 398dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ERROR("sys_prop: permission denied uid:%d name:%s\n", 399dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project cr.uid, msg.name); 400dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 401dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 402dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project break; 403dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 404dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project default: 405dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project break; 406dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 407dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 408dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 409dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectvoid get_property_workspace(int *fd, int *sz) 410dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 411dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *fd = pa_workspace.fd; 412dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *sz = pa_workspace.size; 413dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 414dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 415dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic void load_properties(char *data) 416dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 417dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char *key, *value, *eol, *sol, *tmp; 418dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 419dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project sol = data; 420dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while((eol = strchr(sol, '\n'))) { 421dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project key = sol; 422dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *eol++ = 0; 423dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project sol = eol; 424dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 425dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project value = strchr(key, '='); 426dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(value == 0) continue; 427dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project *value++ = 0; 428dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 429dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while(isspace(*key)) key++; 430dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(*key == '#') continue; 431dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project tmp = value - 2; 432dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while((tmp > key) && isspace(*tmp)) *tmp-- = 0; 433dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 434dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while(isspace(*value)) value++; 435dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project tmp = eol - 2; 436dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while((tmp > value) && isspace(*tmp)) *tmp-- = 0; 437dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 438dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project property_set(key, value); 439dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 440dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 441dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 442dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic void load_properties_from_file(const char *fn) 443dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 444dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char *data; 445dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project unsigned sz; 446dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 447dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project data = read_file(fn, &sz); 448dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 449dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if(data != 0) { 450dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project load_properties(data); 451dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project free(data); 452dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 453dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 454dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 455dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectstatic void load_persistent_properties() 456dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 457dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project DIR* dir = opendir(PERSISTENT_PROPERTY_DIR); 458dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project struct dirent* entry; 459dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char path[PATH_MAX]; 460dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project char value[PROP_VALUE_MAX]; 461dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int fd, length; 462dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 463dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (dir) { 464dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project while ((entry = readdir(dir)) != NULL) { 465b3779558dcfbe99f0b9c1ef796e3728edad25672Mike Lockwood if (strncmp("persist.", entry->d_name, strlen("persist."))) 466dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project continue; 467dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#if HAVE_DIRENT_D_TYPE 468dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (entry->d_type != DT_REG) 469dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project continue; 470dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project#endif 471dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* open the file and read the property value */ 472dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project snprintf(path, sizeof(path), "%s/%s", PERSISTENT_PROPERTY_DIR, entry->d_name); 473dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fd = open(path, O_RDONLY); 474dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (fd >= 0) { 475dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project length = read(fd, value, sizeof(value) - 1); 476dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project if (length >= 0) { 477dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project value[length] = 0; 478dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project property_set(entry->d_name, value); 479dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 480dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ERROR("Unable to read persistent property file %s errno: %d\n", path, errno); 481dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 482dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project close(fd); 483dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 484dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ERROR("Unable to open persistent property file %s errno: %d\n", path, errno); 485dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 486dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 487dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project closedir(dir); 488dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } else { 489dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project ERROR("Unable to open persistent property directory %s errno: %d\n", PERSISTENT_PROPERTY_DIR, errno); 490dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project } 4913dfe6c66646865a78449a435239145deeaeab3baTammo Spalink 492dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project persistent_properties_loaded = 1; 493dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 494dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 495dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Projectvoid property_init(void) 496dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 497dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project init_property_area(); 498dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project load_properties_from_file(PROP_PATH_RAMDISK_DEFAULT); 499dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 500dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 5013294bbbad9494eb4ca534624b96e39f8ed15aaf2Colin Crossint properties_inited(void) 5023294bbbad9494eb4ca534624b96e39f8ed15aaf2Colin Cross{ 5033294bbbad9494eb4ca534624b96e39f8ed15aaf2Colin Cross return property_area_inited; 5043294bbbad9494eb4ca534624b96e39f8ed15aaf2Colin Cross} 5053294bbbad9494eb4ca534624b96e39f8ed15aaf2Colin Cross 506d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Crossvoid start_property_service(void) 507dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project{ 508dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project int fd; 509dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 510dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project load_properties_from_file(PROP_PATH_SYSTEM_BUILD); 511dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project load_properties_from_file(PROP_PATH_SYSTEM_DEFAULT); 512dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project load_properties_from_file(PROP_PATH_LOCAL_OVERRIDE); 513dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project /* Read persistent properties after all default values have been loaded. */ 514dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project load_persistent_properties(); 515dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 516dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fd = create_socket(PROP_SERVICE_NAME, SOCK_STREAM, 0666, 0, 0); 517d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Cross if(fd < 0) return; 518dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fcntl(fd, F_SETFD, FD_CLOEXEC); 519dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project fcntl(fd, F_SETFL, O_NONBLOCK); 520dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project 521dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project listen(fd, 8); 522d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Cross property_set_fd = fd; 523d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Cross} 524d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Cross 525d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Crossint get_property_set_fd() 526d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Cross{ 527d11beb2b1516144327c3f730f75e6b4bc65f1374Colin Cross return property_set_fd; 528dd7bc3319deb2b77c5d07a51b7d6cd7e11b5beb0The Android Open Source Project} 529