logd_reader.c revision facf94c74a2cc44f294c4789d36d5c7281c7bc3f
1c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh/* 2c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * Copyright (C) 2007-2016 The Android Open Source Project 3c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * 4c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * Licensed under the Apache License, Version 2.0 (the "License"); 5c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * you may not use this file except in compliance with the License. 6c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * You may obtain a copy of the License at 7c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * 8c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * http://www.apache.org/licenses/LICENSE-2.0 9c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * 10c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * Unless required by applicable law or agreed to in writing, software 11c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * distributed under the License is distributed on an "AS IS" BASIS, 12c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * See the License for the specific language governing permissions and 14c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * limitations under the License. 15c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh */ 16c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 17c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <endian.h> 18c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <errno.h> 19c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <fcntl.h> 20c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <inttypes.h> 21c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <poll.h> 22c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <stdarg.h> 23c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <stdatomic.h> 24c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <stdio.h> 25c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <stdlib.h> 26c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <string.h> 27c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <sys/stat.h> 28c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <sys/types.h> 29c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <sys/socket.h> 30c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <sys/un.h> 31c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <time.h> 32c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <unistd.h> 33c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 34c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <cutils/sockets.h> 35c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <log/logd.h> 36c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <log/logger.h> 37c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <log/log_read.h> 38c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <private/android_filesystem_config.h> 39c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <private/android_logger.h> 40c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 41c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include "config_read.h" 42c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include "log_portability.h" 43c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include "logger.h" 44c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 45c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh/* branchless on many architectures. */ 46c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#define min(x,y) ((y) ^ (((x) ^ (y)) & -((x) < (y)))) 47c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 48c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic int logdAvailable(log_id_t LogId); 49c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic int logdVersion(struct android_log_logger *logger, 50c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_transport_context *transp); 51c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic int logdRead(struct android_log_logger_list *logger_list, 52c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_transport_context *transp, 53c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct log_msg *log_msg); 54c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic int logdPoll(struct android_log_logger_list *logger_list, 55c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_transport_context *transp); 56c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic void logdClose(struct android_log_logger_list *logger_list, 57c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_transport_context *transp); 58c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic int logdClear(struct android_log_logger *logger, 59c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_transport_context *transp); 60c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic ssize_t logdSetSize(struct android_log_logger *logger, 61c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_transport_context *transp, 62c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh size_t size); 63c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic ssize_t logdGetSize(struct android_log_logger *logger, 64c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_transport_context *transp); 65c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic ssize_t logdGetReadableSize(struct android_log_logger *logger, 66c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_transport_context *transp); 67c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic ssize_t logdGetPrune(struct android_log_logger_list *logger, 68c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_transport_context *transp, 69c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh char *buf, size_t len); 70c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic ssize_t logdSetPrune(struct android_log_logger_list *logger, 71c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_transport_context *transp, 72c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh char *buf, size_t len); 73c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic ssize_t logdGetStats(struct android_log_logger_list *logger, 74c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_transport_context *transp, 75c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh char *buf, size_t len); 76c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 77c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia YehLIBLOG_HIDDEN struct android_log_transport_read logdLoggerRead = { 78c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh .node = { &logdLoggerRead.node, &logdLoggerRead.node }, 79c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh .name = "logd", 80c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh .available = logdAvailable, 81c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh .version = logdVersion, 82c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh .read = logdRead, 83c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh .poll = logdPoll, 84c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh .close = logdClose, 85c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh .clear = logdClear, 86c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh .getSize = logdGetSize, 87c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh .setSize = logdSetSize, 88c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh .getReadableSize = logdGetSize, 89c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh .getPrune = logdGetPrune, 90c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh .setPrune = logdSetPrune, 91c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh .getStats = logdGetStats, 92c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh}; 93c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 94c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic int logdAvailable(log_id_t logId) 95c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh{ 96c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (logId > LOG_ID_KERNEL) { 97c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return -EINVAL; 98c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 99c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (logId == LOG_ID_SECURITY) { 100c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh uid_t uid = __android_log_uid(); 101c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (uid != AID_SYSTEM) { 102c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return -EPERM; 103c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 104c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 105c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (access("/dev/socket/logdw", W_OK) == 0) { 106c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return 0; 107c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 108c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return -EBADF; 109c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh} 110c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 111c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh/* Private copy of ../libcutils/socket_local_client.c prevent library loops */ 112c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 113c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#if defined(_WIN32) 114c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 115c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia YehLIBLOG_WEAK int socket_local_client(const char *name, int namespaceId, int type) 116c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh{ 117c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh errno = ENOSYS; 118c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return -ENOSYS; 119c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh} 120c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 121c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#else /* !_WIN32 */ 122c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 123c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <sys/socket.h> 124c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <sys/un.h> 125c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <sys/select.h> 126c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#include <sys/types.h> 127c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 128c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh/* Private copy of ../libcutils/socket_local.h prevent library loops */ 129c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#define FILESYSTEM_SOCKET_PREFIX "/tmp/" 130c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#define ANDROID_RESERVED_SOCKET_PREFIX "/dev/socket/" 131c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh/* End of ../libcutils/socket_local.h */ 132c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 133c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#define LISTEN_BACKLOG 4 134c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 135c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh/* Documented in header file. */ 136c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia YehLIBLOG_WEAK int socket_make_sockaddr_un(const char *name, int namespaceId, 137c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct sockaddr_un *p_addr, 138c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh socklen_t *alen) 139c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh{ 140c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh memset (p_addr, 0, sizeof (*p_addr)); 141c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh size_t namelen; 142c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 143c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh switch (namespaceId) { 144c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh case ANDROID_SOCKET_NAMESPACE_ABSTRACT: 145c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#if defined(__linux__) 146c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh namelen = strlen(name); 147c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 148c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh /* Test with length +1 for the *initial* '\0'. */ 149c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if ((namelen + 1) > sizeof(p_addr->sun_path)) { 150c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh goto error; 151c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 152c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 153c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh /* 154c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * Note: The path in this case is *not* supposed to be 155c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * '\0'-terminated. ("man 7 unix" for the gory details.) 156c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh */ 157c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 158c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh p_addr->sun_path[0] = 0; 159c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh memcpy(p_addr->sun_path + 1, name, namelen); 160c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#else 161c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh /* this OS doesn't have the Linux abstract namespace */ 162c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 163c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh namelen = strlen(name) + strlen(FILESYSTEM_SOCKET_PREFIX); 164c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh /* unix_path_max appears to be missing on linux */ 165c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (namelen > sizeof(*p_addr) 166c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh - offsetof(struct sockaddr_un, sun_path) - 1) { 167c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh goto error; 168c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 169c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 170c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh strcpy(p_addr->sun_path, FILESYSTEM_SOCKET_PREFIX); 171c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh strcat(p_addr->sun_path, name); 172c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#endif 173c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh break; 174c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 175c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh case ANDROID_SOCKET_NAMESPACE_RESERVED: 176c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh namelen = strlen(name) + strlen(ANDROID_RESERVED_SOCKET_PREFIX); 177c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh /* unix_path_max appears to be missing on linux */ 178c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (namelen > sizeof(*p_addr) 179c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh - offsetof(struct sockaddr_un, sun_path) - 1) { 180c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh goto error; 181c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 182c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 183c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh strcpy(p_addr->sun_path, ANDROID_RESERVED_SOCKET_PREFIX); 184c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh strcat(p_addr->sun_path, name); 185c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh break; 186c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 187c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh case ANDROID_SOCKET_NAMESPACE_FILESYSTEM: 188c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh namelen = strlen(name); 189c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh /* unix_path_max appears to be missing on linux */ 190c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (namelen > sizeof(*p_addr) 191c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh - offsetof(struct sockaddr_un, sun_path) - 1) { 192c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh goto error; 193c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 194c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 195c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh strcpy(p_addr->sun_path, name); 196c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh break; 197c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 198c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh default: 199c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh /* invalid namespace id */ 200c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return -1; 201c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 202c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 203c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh p_addr->sun_family = AF_LOCAL; 204c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh *alen = namelen + offsetof(struct sockaddr_un, sun_path) + 1; 205c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return 0; 206c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeherror: 207c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return -1; 208c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh} 209c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 210c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh/** 211c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * connect to peer named "name" on fd 212c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * returns same fd or -1 on error. 213c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * fd is not closed on error. that's your job. 214c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * 215c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * Used by AndroidSocketImpl 216c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh */ 217c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia YehLIBLOG_WEAK int socket_local_client_connect(int fd, const char *name, 218c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh int namespaceId, int type __unused) 219c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh{ 220c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct sockaddr_un addr; 221c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh socklen_t alen; 222c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh int err; 223c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 224c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh err = socket_make_sockaddr_un(name, namespaceId, &addr, &alen); 225c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 226c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (err < 0) { 227c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh goto error; 228c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 229c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 230c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if(connect(fd, (struct sockaddr *) &addr, alen) < 0) { 231c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh goto error; 232c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 233c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 234c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return fd; 235c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 236c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeherror: 237c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return -1; 238c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh} 239c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 240c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh/** 241c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * connect to peer named "name" 242c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * returns fd or -1 on error 243c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh */ 244c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia YehLIBLOG_WEAK int socket_local_client(const char *name, int namespaceId, int type) 245c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh{ 246c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh int s; 247c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 248c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh s = socket(AF_LOCAL, type, 0); 249c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if(s < 0) return -1; 250c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 251c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if ( 0 > socket_local_client_connect(s, name, namespaceId, type)) { 252c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh close(s); 253c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return -1; 254c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 255c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 256c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return s; 257c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh} 258c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 259c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh#endif /* !_WIN32 */ 260c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh/* End of ../libcutils/socket_local_client.c */ 261c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 262c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh/* worker for sending the command to the logger */ 263c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic ssize_t send_log_msg(struct android_log_logger *logger, 264c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh const char *msg, char *buf, size_t buf_size) 265c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh{ 266c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ssize_t ret; 267c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh size_t len; 268c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh char *cp; 269c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh int errno_save = 0; 270c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh int sock = socket_local_client("logd", ANDROID_SOCKET_NAMESPACE_RESERVED, 271c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh SOCK_STREAM); 272c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (sock < 0) { 273c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return sock; 274c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 275c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 276c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (msg) { 277c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh snprintf(buf, buf_size, msg, logger ? logger->logId : (unsigned) -1); 278c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 279c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 280c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh len = strlen(buf) + 1; 281c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ret = TEMP_FAILURE_RETRY(write(sock, buf, len)); 282c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (ret <= 0) { 283c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh goto done; 284c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 285c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 286c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh len = buf_size; 287c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh cp = buf; 288c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh while ((ret = TEMP_FAILURE_RETRY(read(sock, cp, len))) > 0) { 289c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct pollfd p; 290c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 291c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (((size_t)ret == len) || (buf_size < PAGE_SIZE)) { 292c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh break; 293c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 294c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 295c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh len -= ret; 296c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh cp += ret; 297c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 298c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh memset(&p, 0, sizeof(p)); 299c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh p.fd = sock; 300c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh p.events = POLLIN; 301c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 302c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh /* Give other side 20ms to refill pipe */ 303c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ret = TEMP_FAILURE_RETRY(poll(&p, 1, 20)); 304c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 305c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (ret <= 0) { 306c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh break; 307c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 308c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 309c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (!(p.revents & POLLIN)) { 310c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ret = 0; 311c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh break; 312c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 313c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 314c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 315c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (ret >= 0) { 316c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ret += buf_size - len; 317c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 318c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 319c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehdone: 320c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if ((ret == -1) && errno) { 321c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh errno_save = errno; 322c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 323c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh close(sock); 324c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (errno_save) { 325c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh errno = errno_save; 326c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 327c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return ret; 328c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh} 329c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 330c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic int check_log_success(char *buf, ssize_t ret) 331c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh{ 332c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (ret < 0) { 333c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return ret; 334c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 335c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 336c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (strncmp(buf, "success", 7)) { 337c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh errno = EINVAL; 338c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return -1; 339c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 340c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 341c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return 0; 342c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh} 343c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 344c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic int logdClear(struct android_log_logger *logger, 345c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_transport_context *transp __unused) 346c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh{ 347c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh char buf[512]; 348c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 349c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return check_log_success(buf, 350c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh send_log_msg(logger, "clear %d", buf, sizeof(buf))); 351c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh} 352c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 353c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh/* returns the total size of the log's ring buffer */ 354c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic ssize_t logdGetSize(struct android_log_logger *logger, 355c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_transport_context *transp __unused) 356c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh{ 357c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh char buf[512]; 358c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 359c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ssize_t ret = send_log_msg(logger, "getLogSize %d", buf, sizeof(buf)); 360c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (ret < 0) { 361c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return ret; 362c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 363c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 364c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if ((buf[0] < '0') || ('9' < buf[0])) { 365c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return -1; 366c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 367c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 368c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return atol(buf); 369c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh} 370c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 371c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic ssize_t logdSetSize( 372c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_logger *logger, 373c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_transport_context *transp __unused, 374c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh size_t size) 375c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh{ 376c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh char buf[512]; 377c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 378c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh snprintf(buf, sizeof(buf), "setLogSize %d %zu", logger->logId, size); 379c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 380c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return check_log_success(buf, send_log_msg(NULL, NULL, buf, sizeof(buf))); 381c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh} 382c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 383c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh/* 384c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * returns the readable size of the log's ring buffer (that is, amount of the 385c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * log consumed) 386c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh */ 387c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic ssize_t logdGetReadableSize( 388c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_logger *logger, 389c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_transport_context *transp __unused) 390c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh{ 391c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh char buf[512]; 392c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 393c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ssize_t ret = send_log_msg(logger, "getLogSizeUsed %d", buf, sizeof(buf)); 394c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (ret < 0) { 395c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return ret; 396c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 397c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 398c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if ((buf[0] < '0') || ('9' < buf[0])) { 399c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return -1; 400c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 401c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 402c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return atol(buf); 403c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh} 404c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 405c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh/* 406c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * returns the logger version 407c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh */ 408c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic int logdVersion( 409c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_logger *logger __unused, 410c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_transport_context *transp __unused) 411c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh{ 412c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh uid_t uid = __android_log_uid(); 413c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return ((uid != AID_ROOT) && (uid != AID_LOG) && (uid != AID_SYSTEM)) ? 3 : 4; 414c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh} 415c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 416c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh/* 417c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh * returns statistics 418c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh */ 419c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic ssize_t logdGetStats(struct android_log_logger_list *logger_list, 420c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_transport_context *transp __unused, 421c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh char *buf, size_t len) 422c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh{ 423c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_logger *logger; 424c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh char *cp = buf; 425c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh size_t remaining = len; 426c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh size_t n; 427c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 428c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh n = snprintf(cp, remaining, "getStatistics"); 429c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh n = min(n, remaining); 430c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh remaining -= n; 431c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh cp += n; 432c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 433c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh logger_for_each(logger, logger_list) { 434c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh n = snprintf(cp, remaining, " %d", logger->logId); 435c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh n = min(n, remaining); 436c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh remaining -= n; 437c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh cp += n; 438c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 439c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 440c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (logger_list->pid) { 441c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh snprintf(cp, remaining, " pid=%u", logger_list->pid); 442c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 443c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 444c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return send_log_msg(NULL, NULL, buf, len); 445c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh} 446c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 447c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic ssize_t logdGetPrune( 448c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_logger_list *logger_list __unused, 449c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_transport_context *transp __unused, 450c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh char *buf, size_t len) 451c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh{ 452c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return send_log_msg(NULL, "getPruneList", buf, len); 453c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh} 454c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 455c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic ssize_t logdSetPrune( 456c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_logger_list *logger_list __unused, 457c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_transport_context *transp __unused, 458c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh char *buf, size_t len) 459c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh{ 460c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh const char cmd[] = "setPruneList "; 461c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh const size_t cmdlen = sizeof(cmd) - 1; 462c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 463c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (strlen(buf) > (len - cmdlen)) { 464c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return -ENOMEM; /* KISS */ 465c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 466c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh memmove(buf + cmdlen, buf, len - cmdlen); 467c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh buf[len - 1] = '\0'; 468c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh memcpy(buf, cmd, cmdlen); 469c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 470c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return check_log_success(buf, send_log_msg(NULL, NULL, buf, len)); 471c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh} 472c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 473c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 474c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic void caught_signal(int signum __unused) 475c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh{ 476c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh} 477c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 478c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic int logdOpen(struct android_log_logger_list *logger_list, 479c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_transport_context *transp) 480c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh{ 481c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_logger *logger; 482c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct sigaction ignore; 483c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct sigaction old_sigaction; 484c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh unsigned int old_alarm = 0; 485c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh char buffer[256], *cp, c; 486c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh int e, ret, remaining; 487c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 488c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh int sock = transp->context.sock; 489c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (sock > 0) { 490c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return sock; 491c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 492c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 493c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (!logger_list) { 494c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return -EINVAL; 495c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 496c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 497c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh sock = socket_local_client("logdr", 498c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ANDROID_SOCKET_NAMESPACE_RESERVED, 499c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh SOCK_SEQPACKET); 500c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (sock == 0) { 501c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh /* Guarantee not file descriptor zero */ 502c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh int newsock = socket_local_client("logdr", 503c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ANDROID_SOCKET_NAMESPACE_RESERVED, 504c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh SOCK_SEQPACKET); 505c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh close(sock); 506c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh sock = newsock; 507c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 508c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (sock <= 0) { 509c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if ((sock == -1) && errno) { 510c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return -errno; 511c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 512c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return sock; 513c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 514c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 515c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh strcpy(buffer, (logger_list->mode & ANDROID_LOG_NONBLOCK) ? 516c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh "dumpAndClose" : "stream"); 517c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh cp = buffer + strlen(buffer); 518c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 519c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh strcpy(cp, " lids"); 520c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh cp += 5; 521c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh c = '='; 522c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh remaining = sizeof(buffer) - (cp - buffer); 523c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh logger_for_each(logger, logger_list) { 524c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ret = snprintf(cp, remaining, "%c%u", c, logger->logId); 525c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ret = min(ret, remaining); 526c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh remaining -= ret; 527c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh cp += ret; 528c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh c = ','; 529c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 530c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 531c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (logger_list->tail) { 532c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ret = snprintf(cp, remaining, " tail=%u", logger_list->tail); 533c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ret = min(ret, remaining); 534c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh remaining -= ret; 535c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh cp += ret; 536c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 537c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 538c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (logger_list->start.tv_sec || logger_list->start.tv_nsec) { 539c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (logger_list->mode & ANDROID_LOG_WRAP) { 540c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh // ToDo: alternate API to allow timeout to be adjusted. 541c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ret = snprintf(cp, remaining, " timeout=%u", 542c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ANDROID_LOG_WRAP_DEFAULT_TIMEOUT); 543c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ret = min(ret, remaining); 544c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh remaining -= ret; 545c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh cp += ret; 546c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 547c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ret = snprintf(cp, remaining, " start=%" PRIu32 ".%09" PRIu32, 548c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh logger_list->start.tv_sec, 549c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh logger_list->start.tv_nsec); 550c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ret = min(ret, remaining); 551c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh remaining -= ret; 552c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh cp += ret; 553c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 554c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 555c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (logger_list->pid) { 556c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ret = snprintf(cp, remaining, " pid=%u", logger_list->pid); 557c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ret = min(ret, remaining); 558c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh cp += ret; 559c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 560c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 561c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (logger_list->mode & ANDROID_LOG_NONBLOCK) { 562c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh /* Deal with an unresponsive logd */ 563c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh memset(&ignore, 0, sizeof(ignore)); 564c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ignore.sa_handler = caught_signal; 565c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh sigemptyset(&ignore.sa_mask); 566c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh /* particularily useful if tombstone is reporting for logd */ 567c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh sigaction(SIGALRM, &ignore, &old_sigaction); 568c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh old_alarm = alarm(30); 569c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 570c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ret = write(sock, buffer, cp - buffer); 571c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh e = errno; 572c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (logger_list->mode & ANDROID_LOG_NONBLOCK) { 573c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (e == EINTR) { 574c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh e = ETIMEDOUT; 575c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 576c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh alarm(old_alarm); 577c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh sigaction(SIGALRM, &old_sigaction, NULL); 578c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 579c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 580c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (ret <= 0) { 581c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh close(sock); 582c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if ((ret == -1) && e) { 583c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return -e; 584c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 585c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (ret == 0) { 586c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return -EIO; 587c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 588c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return ret; 589c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 590c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 591c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return transp->context.sock = sock; 592c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh} 593c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 594c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh/* Read from the selected logs */ 595c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yehstatic int logdRead(struct android_log_logger_list *logger_list, 596c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct android_log_transport_context *transp, 597c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct log_msg *log_msg) 598c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh{ 599c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh int ret, e; 600c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct sigaction ignore; 601c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh struct sigaction old_sigaction; 602c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh unsigned int old_alarm = 0; 603c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 604c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ret = logdOpen(logger_list, transp); 605c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (ret < 0) { 606c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh return ret; 607c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 608c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 609c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh memset(log_msg, 0, sizeof(*log_msg)); 610c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 611c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (logger_list->mode & ANDROID_LOG_NONBLOCK) { 612c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh memset(&ignore, 0, sizeof(ignore)); 613c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ignore.sa_handler = caught_signal; 614c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh sigemptyset(&ignore.sa_mask); 615c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh /* particularily useful if tombstone is reporting for logd */ 616c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh sigaction(SIGALRM, &ignore, &old_sigaction); 617c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh old_alarm = alarm(30); 618c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 619c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 620c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh /* NOTE: SOCK_SEQPACKET guarantees we read exactly one full entry */ 621c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ret = recv(ret, log_msg, LOGGER_ENTRY_MAX_LEN, 0); 622c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh e = errno; 623c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh 624c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if (logger_list->mode & ANDROID_LOG_NONBLOCK) { 625c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh if ((ret == 0) || (e == EINTR)) { 626c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh e = EAGAIN; 627c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh ret = -1; 628c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 629c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh alarm(old_alarm); 630c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh sigaction(SIGALRM, &old_sigaction, NULL); 631c360382bf257d815b2a411152485d3c3b37a9f46Yin-Chia Yeh } 632 633 if ((ret == -1) && e) { 634 return -e; 635 } 636 return ret; 637} 638 639static int logdPoll(struct android_log_logger_list *logger_list, 640 struct android_log_transport_context *transp) 641{ 642 struct pollfd p; 643 644 int ret = logdOpen(logger_list, transp); 645 if (ret < 0) { 646 return ret; 647 } 648 649 memset(&p, 0, sizeof(p)); 650 p.fd = ret; 651 p.events = POLLIN; 652 ret = poll(&p, 1, 20); 653 if ((ret > 0) && !(p.revents & POLLIN)) { 654 ret = 0; 655 } 656 if ((ret == -1) && errno) { 657 return -errno; 658 } 659 return ret; 660} 661 662/* Close all the logs */ 663static void logdClose(struct android_log_logger_list *logger_list __unused, 664 struct android_log_transport_context *transp) 665{ 666 if (transp->context.sock > 0) { 667 close (transp->context.sock); 668 transp->context.sock = -1; 669 } 670} 671