Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007-2016 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include <endian.h> |
| 18 | #include <errno.h> |
| 19 | #include <fcntl.h> |
| 20 | #include <inttypes.h> |
| 21 | #include <poll.h> |
| 22 | #include <stdarg.h> |
| 23 | #include <stdatomic.h> |
| 24 | #include <stdio.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <string.h> |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 27 | #include <sys/socket.h> |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 28 | #include <sys/stat.h> |
| 29 | #include <sys/types.h> |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 30 | #include <sys/un.h> |
| 31 | #include <time.h> |
| 32 | #include <unistd.h> |
| 33 | |
| 34 | #include <cutils/sockets.h> |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 35 | #include <private/android_filesystem_config.h> |
| 36 | #include <private/android_logger.h> |
| 37 | |
| 38 | #include "config_read.h" |
| 39 | #include "log_portability.h" |
Mark Salyzyn | c9e5f37 | 2016-09-21 09:24:13 -0700 | [diff] [blame] | 40 | #include "logd_reader.h" |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 41 | #include "logger.h" |
| 42 | |
| 43 | /* branchless on many architectures. */ |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 44 | #define min(x, y) ((y) ^ (((x) ^ (y)) & -((x) < (y)))) |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 45 | |
| 46 | static int logdAvailable(log_id_t LogId); |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 47 | static int logdVersion(struct android_log_logger* logger, |
| 48 | struct android_log_transport_context* transp); |
| 49 | static int logdRead(struct android_log_logger_list* logger_list, |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 50 | struct android_log_transport_context* transp, struct log_msg* log_msg); |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 51 | static int logdPoll(struct android_log_logger_list* logger_list, |
| 52 | struct android_log_transport_context* transp); |
| 53 | static void logdClose(struct android_log_logger_list* logger_list, |
| 54 | struct android_log_transport_context* transp); |
| 55 | static int logdClear(struct android_log_logger* logger, |
| 56 | struct android_log_transport_context* transp); |
| 57 | static ssize_t logdSetSize(struct android_log_logger* logger, |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 58 | struct android_log_transport_context* transp, size_t size); |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 59 | static ssize_t logdGetSize(struct android_log_logger* logger, |
| 60 | struct android_log_transport_context* transp); |
| 61 | static ssize_t logdGetReadableSize(struct android_log_logger* logger, |
| 62 | struct android_log_transport_context* transp); |
| 63 | static ssize_t logdGetPrune(struct android_log_logger_list* logger, |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 64 | struct android_log_transport_context* transp, char* buf, size_t len); |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 65 | static ssize_t logdSetPrune(struct android_log_logger_list* logger, |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 66 | struct android_log_transport_context* transp, char* buf, size_t len); |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 67 | static ssize_t logdGetStats(struct android_log_logger_list* logger, |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 68 | struct android_log_transport_context* transp, char* buf, size_t len); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 69 | |
Tom Cherry | 2d9779e | 2019-02-08 11:46:19 -0800 | [diff] [blame^] | 70 | struct android_log_transport_read logdLoggerRead = { |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 71 | .node = {&logdLoggerRead.node, &logdLoggerRead.node}, |
| 72 | .name = "logd", |
| 73 | .available = logdAvailable, |
| 74 | .version = logdVersion, |
| 75 | .read = logdRead, |
| 76 | .poll = logdPoll, |
| 77 | .close = logdClose, |
| 78 | .clear = logdClear, |
| 79 | .getSize = logdGetSize, |
| 80 | .setSize = logdSetSize, |
| 81 | .getReadableSize = logdGetReadableSize, |
| 82 | .getPrune = logdGetPrune, |
| 83 | .setPrune = logdSetPrune, |
| 84 | .getStats = logdGetStats, |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 85 | }; |
| 86 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 87 | static int logdAvailable(log_id_t logId) { |
| 88 | if (logId >= LOG_ID_MAX) { |
| 89 | return -EINVAL; |
| 90 | } |
| 91 | if (logId == LOG_ID_SECURITY) { |
| 92 | uid_t uid = __android_log_uid(); |
| 93 | if (uid != AID_SYSTEM) { |
| 94 | return -EPERM; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 95 | } |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 96 | } |
| 97 | if (access("/dev/socket/logdw", W_OK) == 0) { |
| 98 | return 0; |
| 99 | } |
| 100 | return -EBADF; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 101 | } |
| 102 | |
| 103 | /* Private copy of ../libcutils/socket_local_client.c prevent library loops */ |
| 104 | |
| 105 | #if defined(_WIN32) |
| 106 | |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 107 | LIBLOG_WEAK int socket_local_client(const char* name, int namespaceId, int type) { |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 108 | errno = ENOSYS; |
| 109 | return -ENOSYS; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 110 | } |
| 111 | |
| 112 | #else /* !_WIN32 */ |
| 113 | |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 114 | #include <sys/select.h> |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 115 | #include <sys/socket.h> |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 116 | #include <sys/types.h> |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 117 | #include <sys/un.h> |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 118 | |
| 119 | /* Private copy of ../libcutils/socket_local.h prevent library loops */ |
| 120 | #define FILESYSTEM_SOCKET_PREFIX "/tmp/" |
| 121 | #define ANDROID_RESERVED_SOCKET_PREFIX "/dev/socket/" |
| 122 | /* End of ../libcutils/socket_local.h */ |
| 123 | |
| 124 | #define LISTEN_BACKLOG 4 |
| 125 | |
| 126 | /* Documented in header file. */ |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 127 | LIBLOG_WEAK int socket_make_sockaddr_un(const char* name, int namespaceId, |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 128 | struct sockaddr_un* p_addr, socklen_t* alen) { |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 129 | memset(p_addr, 0, sizeof(*p_addr)); |
| 130 | size_t namelen; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 131 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 132 | switch (namespaceId) { |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 133 | case ANDROID_SOCKET_NAMESPACE_ABSTRACT: |
| 134 | #if defined(__linux__) |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 135 | namelen = strlen(name); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 136 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 137 | /* Test with length +1 for the *initial* '\0'. */ |
| 138 | if ((namelen + 1) > sizeof(p_addr->sun_path)) { |
| 139 | goto error; |
| 140 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 141 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 142 | /* |
| 143 | * Note: The path in this case is *not* supposed to be |
| 144 | * '\0'-terminated. ("man 7 unix" for the gory details.) |
| 145 | */ |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 146 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 147 | p_addr->sun_path[0] = 0; |
| 148 | memcpy(p_addr->sun_path + 1, name, namelen); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 149 | #else |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 150 | /* this OS doesn't have the Linux abstract namespace */ |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 151 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 152 | namelen = strlen(name) + strlen(FILESYSTEM_SOCKET_PREFIX); |
| 153 | /* unix_path_max appears to be missing on linux */ |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 154 | if (namelen > sizeof(*p_addr) - offsetof(struct sockaddr_un, sun_path) - 1) { |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 155 | goto error; |
| 156 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 157 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 158 | strcpy(p_addr->sun_path, FILESYSTEM_SOCKET_PREFIX); |
| 159 | strcat(p_addr->sun_path, name); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 160 | #endif |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 161 | break; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 162 | |
| 163 | case ANDROID_SOCKET_NAMESPACE_RESERVED: |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 164 | namelen = strlen(name) + strlen(ANDROID_RESERVED_SOCKET_PREFIX); |
| 165 | /* unix_path_max appears to be missing on linux */ |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 166 | if (namelen > sizeof(*p_addr) - offsetof(struct sockaddr_un, sun_path) - 1) { |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 167 | goto error; |
| 168 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 169 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 170 | strcpy(p_addr->sun_path, ANDROID_RESERVED_SOCKET_PREFIX); |
| 171 | strcat(p_addr->sun_path, name); |
| 172 | break; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 173 | |
| 174 | case ANDROID_SOCKET_NAMESPACE_FILESYSTEM: |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 175 | namelen = strlen(name); |
| 176 | /* unix_path_max appears to be missing on linux */ |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 177 | if (namelen > sizeof(*p_addr) - offsetof(struct sockaddr_un, sun_path) - 1) { |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 178 | goto error; |
| 179 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 180 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 181 | strcpy(p_addr->sun_path, name); |
| 182 | break; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 183 | |
| 184 | default: |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 185 | /* invalid namespace id */ |
| 186 | return -1; |
| 187 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 188 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 189 | p_addr->sun_family = AF_LOCAL; |
| 190 | *alen = namelen + offsetof(struct sockaddr_un, sun_path) + 1; |
| 191 | return 0; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 192 | error: |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 193 | return -1; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 194 | } |
| 195 | |
| 196 | /** |
| 197 | * connect to peer named "name" on fd |
| 198 | * returns same fd or -1 on error. |
| 199 | * fd is not closed on error. that's your job. |
| 200 | * |
| 201 | * Used by AndroidSocketImpl |
| 202 | */ |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 203 | LIBLOG_WEAK int socket_local_client_connect(int fd, const char* name, int namespaceId, |
| 204 | int type __unused) { |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 205 | struct sockaddr_un addr; |
| 206 | socklen_t alen; |
| 207 | int err; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 208 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 209 | err = socket_make_sockaddr_un(name, namespaceId, &addr, &alen); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 210 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 211 | if (err < 0) { |
| 212 | goto error; |
| 213 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 214 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 215 | if (connect(fd, (struct sockaddr*)&addr, alen) < 0) { |
| 216 | goto error; |
| 217 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 218 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 219 | return fd; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 220 | |
| 221 | error: |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 222 | return -1; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 223 | } |
| 224 | |
| 225 | /** |
| 226 | * connect to peer named "name" |
| 227 | * returns fd or -1 on error |
| 228 | */ |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 229 | LIBLOG_WEAK int socket_local_client(const char* name, int namespaceId, int type) { |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 230 | int s; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 231 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 232 | s = socket(AF_LOCAL, type, 0); |
| 233 | if (s < 0) return -1; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 234 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 235 | if (0 > socket_local_client_connect(s, name, namespaceId, type)) { |
| 236 | close(s); |
| 237 | return -1; |
| 238 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 239 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 240 | return s; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 241 | } |
| 242 | |
| 243 | #endif /* !_WIN32 */ |
| 244 | /* End of ../libcutils/socket_local_client.c */ |
| 245 | |
| 246 | /* worker for sending the command to the logger */ |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 247 | static ssize_t send_log_msg(struct android_log_logger* logger, const char* msg, char* buf, |
| 248 | size_t buf_size) { |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 249 | ssize_t ret; |
| 250 | size_t len; |
| 251 | char* cp; |
| 252 | int errno_save = 0; |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 253 | int sock = socket_local_client("logd", ANDROID_SOCKET_NAMESPACE_RESERVED, SOCK_STREAM); |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 254 | if (sock < 0) { |
| 255 | return sock; |
| 256 | } |
| 257 | |
| 258 | if (msg) { |
| 259 | snprintf(buf, buf_size, msg, logger ? logger->logId : (unsigned)-1); |
| 260 | } |
| 261 | |
| 262 | len = strlen(buf) + 1; |
| 263 | ret = TEMP_FAILURE_RETRY(write(sock, buf, len)); |
| 264 | if (ret <= 0) { |
| 265 | goto done; |
| 266 | } |
| 267 | |
| 268 | len = buf_size; |
| 269 | cp = buf; |
| 270 | while ((ret = TEMP_FAILURE_RETRY(read(sock, cp, len))) > 0) { |
| 271 | struct pollfd p; |
| 272 | |
| 273 | if (((size_t)ret == len) || (buf_size < PAGE_SIZE)) { |
| 274 | break; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 275 | } |
| 276 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 277 | len -= ret; |
| 278 | cp += ret; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 279 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 280 | memset(&p, 0, sizeof(p)); |
| 281 | p.fd = sock; |
| 282 | p.events = POLLIN; |
| 283 | |
| 284 | /* Give other side 20ms to refill pipe */ |
| 285 | ret = TEMP_FAILURE_RETRY(poll(&p, 1, 20)); |
| 286 | |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 287 | if (ret <= 0) { |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 288 | break; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 289 | } |
| 290 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 291 | if (!(p.revents & POLLIN)) { |
| 292 | ret = 0; |
| 293 | break; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 294 | } |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 295 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 296 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 297 | if (ret >= 0) { |
| 298 | ret += buf_size - len; |
| 299 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 300 | |
| 301 | done: |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 302 | if ((ret == -1) && errno) { |
| 303 | errno_save = errno; |
| 304 | } |
| 305 | close(sock); |
| 306 | if (errno_save) { |
| 307 | errno = errno_save; |
| 308 | } |
| 309 | return ret; |
| 310 | } |
| 311 | |
Tom Cherry | 2d9779e | 2019-02-08 11:46:19 -0800 | [diff] [blame^] | 312 | ssize_t __send_log_msg(char* buf, size_t buf_size) { |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 313 | return send_log_msg(NULL, NULL, buf, buf_size); |
| 314 | } |
| 315 | |
| 316 | static int check_log_success(char* buf, ssize_t ret) { |
| 317 | if (ret < 0) { |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 318 | return ret; |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 319 | } |
| 320 | |
| 321 | if (strncmp(buf, "success", 7)) { |
| 322 | errno = EINVAL; |
| 323 | return -1; |
| 324 | } |
| 325 | |
| 326 | return 0; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 327 | } |
| 328 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 329 | static int logdClear(struct android_log_logger* logger, |
| 330 | struct android_log_transport_context* transp __unused) { |
| 331 | char buf[512]; |
Mark Salyzyn | c9e5f37 | 2016-09-21 09:24:13 -0700 | [diff] [blame] | 332 | |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 333 | return check_log_success(buf, send_log_msg(logger, "clear %d", buf, sizeof(buf))); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 334 | } |
| 335 | |
| 336 | /* returns the total size of the log's ring buffer */ |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 337 | static ssize_t logdGetSize(struct android_log_logger* logger, |
| 338 | struct android_log_transport_context* transp __unused) { |
| 339 | char buf[512]; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 340 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 341 | ssize_t ret = send_log_msg(logger, "getLogSize %d", buf, sizeof(buf)); |
| 342 | if (ret < 0) { |
| 343 | return ret; |
| 344 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 345 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 346 | if ((buf[0] < '0') || ('9' < buf[0])) { |
| 347 | return -1; |
| 348 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 349 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 350 | return atol(buf); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 351 | } |
| 352 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 353 | static ssize_t logdSetSize(struct android_log_logger* logger, |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 354 | struct android_log_transport_context* transp __unused, size_t size) { |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 355 | char buf[512]; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 356 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 357 | snprintf(buf, sizeof(buf), "setLogSize %d %zu", logger->logId, size); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 358 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 359 | return check_log_success(buf, send_log_msg(NULL, NULL, buf, sizeof(buf))); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 360 | } |
| 361 | |
| 362 | /* |
| 363 | * returns the readable size of the log's ring buffer (that is, amount of the |
| 364 | * log consumed) |
| 365 | */ |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 366 | static ssize_t logdGetReadableSize(struct android_log_logger* logger, |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 367 | struct android_log_transport_context* transp __unused) { |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 368 | char buf[512]; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 369 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 370 | ssize_t ret = send_log_msg(logger, "getLogSizeUsed %d", buf, sizeof(buf)); |
| 371 | if (ret < 0) { |
| 372 | return ret; |
| 373 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 374 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 375 | if ((buf[0] < '0') || ('9' < buf[0])) { |
| 376 | return -1; |
| 377 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 378 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 379 | return atol(buf); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 380 | } |
| 381 | |
| 382 | /* |
| 383 | * returns the logger version |
| 384 | */ |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 385 | static int logdVersion(struct android_log_logger* logger __unused, |
| 386 | struct android_log_transport_context* transp __unused) { |
| 387 | uid_t uid = __android_log_uid(); |
| 388 | return ((uid != AID_ROOT) && (uid != AID_LOG) && (uid != AID_SYSTEM)) ? 3 : 4; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 389 | } |
| 390 | |
| 391 | /* |
| 392 | * returns statistics |
| 393 | */ |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 394 | static ssize_t logdGetStats(struct android_log_logger_list* logger_list, |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 395 | struct android_log_transport_context* transp __unused, char* buf, |
| 396 | size_t len) { |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 397 | struct android_log_logger* logger; |
| 398 | char* cp = buf; |
| 399 | size_t remaining = len; |
| 400 | size_t n; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 401 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 402 | n = snprintf(cp, remaining, "getStatistics"); |
| 403 | n = min(n, remaining); |
| 404 | remaining -= n; |
| 405 | cp += n; |
| 406 | |
| 407 | logger_for_each(logger, logger_list) { |
| 408 | n = snprintf(cp, remaining, " %d", logger->logId); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 409 | n = min(n, remaining); |
| 410 | remaining -= n; |
| 411 | cp += n; |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 412 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 413 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 414 | if (logger_list->pid) { |
| 415 | snprintf(cp, remaining, " pid=%u", logger_list->pid); |
| 416 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 417 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 418 | return send_log_msg(NULL, NULL, buf, len); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 419 | } |
| 420 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 421 | static ssize_t logdGetPrune(struct android_log_logger_list* logger_list __unused, |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 422 | struct android_log_transport_context* transp __unused, char* buf, |
| 423 | size_t len) { |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 424 | return send_log_msg(NULL, "getPruneList", buf, len); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 425 | } |
| 426 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 427 | static ssize_t logdSetPrune(struct android_log_logger_list* logger_list __unused, |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 428 | struct android_log_transport_context* transp __unused, char* buf, |
| 429 | size_t len) { |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 430 | const char cmd[] = "setPruneList "; |
| 431 | const size_t cmdlen = sizeof(cmd) - 1; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 432 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 433 | if (strlen(buf) > (len - cmdlen)) { |
| 434 | return -ENOMEM; /* KISS */ |
| 435 | } |
| 436 | memmove(buf + cmdlen, buf, len - cmdlen); |
| 437 | buf[len - 1] = '\0'; |
| 438 | memcpy(buf, cmd, cmdlen); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 439 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 440 | return check_log_success(buf, send_log_msg(NULL, NULL, buf, len)); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 441 | } |
| 442 | |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 443 | static void caught_signal(int signum __unused) {} |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 444 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 445 | static int logdOpen(struct android_log_logger_list* logger_list, |
| 446 | struct android_log_transport_context* transp) { |
| 447 | struct android_log_logger* logger; |
| 448 | struct sigaction ignore; |
| 449 | struct sigaction old_sigaction; |
| 450 | unsigned int old_alarm = 0; |
| 451 | char buffer[256], *cp, c; |
| 452 | int e, ret, remaining, sock; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 453 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 454 | if (!logger_list) { |
| 455 | return -EINVAL; |
| 456 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 457 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 458 | sock = atomic_load(&transp->context.sock); |
| 459 | if (sock > 0) { |
| 460 | return sock; |
| 461 | } |
Mark Salyzyn | db8a266 | 2016-10-10 07:27:42 -0700 | [diff] [blame] | 462 | |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 463 | sock = socket_local_client("logdr", ANDROID_SOCKET_NAMESPACE_RESERVED, SOCK_SEQPACKET); |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 464 | if (sock == 0) { |
| 465 | /* Guarantee not file descriptor zero */ |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 466 | int newsock = socket_local_client("logdr", ANDROID_SOCKET_NAMESPACE_RESERVED, SOCK_SEQPACKET); |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 467 | close(sock); |
| 468 | sock = newsock; |
| 469 | } |
| 470 | if (sock <= 0) { |
| 471 | if ((sock == -1) && errno) { |
| 472 | return -errno; |
Mark Salyzyn | db8a266 | 2016-10-10 07:27:42 -0700 | [diff] [blame] | 473 | } |
| 474 | return sock; |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 475 | } |
| 476 | |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 477 | strcpy(buffer, (logger_list->mode & ANDROID_LOG_NONBLOCK) ? "dumpAndClose" : "stream"); |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 478 | cp = buffer + strlen(buffer); |
| 479 | |
| 480 | strcpy(cp, " lids"); |
| 481 | cp += 5; |
| 482 | c = '='; |
| 483 | remaining = sizeof(buffer) - (cp - buffer); |
| 484 | logger_for_each(logger, logger_list) { |
| 485 | ret = snprintf(cp, remaining, "%c%u", c, logger->logId); |
| 486 | ret = min(ret, remaining); |
| 487 | remaining -= ret; |
| 488 | cp += ret; |
| 489 | c = ','; |
| 490 | } |
| 491 | |
| 492 | if (logger_list->tail) { |
| 493 | ret = snprintf(cp, remaining, " tail=%u", logger_list->tail); |
| 494 | ret = min(ret, remaining); |
| 495 | remaining -= ret; |
| 496 | cp += ret; |
| 497 | } |
| 498 | |
| 499 | if (logger_list->start.tv_sec || logger_list->start.tv_nsec) { |
| 500 | if (logger_list->mode & ANDROID_LOG_WRAP) { |
| 501 | // ToDo: alternate API to allow timeout to be adjusted. |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 502 | ret = snprintf(cp, remaining, " timeout=%u", ANDROID_LOG_WRAP_DEFAULT_TIMEOUT); |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 503 | ret = min(ret, remaining); |
| 504 | remaining -= ret; |
| 505 | cp += ret; |
| 506 | } |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 507 | ret = snprintf(cp, remaining, " start=%" PRIu32 ".%09" PRIu32, logger_list->start.tv_sec, |
| 508 | logger_list->start.tv_nsec); |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 509 | ret = min(ret, remaining); |
| 510 | remaining -= ret; |
| 511 | cp += ret; |
| 512 | } |
| 513 | |
| 514 | if (logger_list->pid) { |
| 515 | ret = snprintf(cp, remaining, " pid=%u", logger_list->pid); |
| 516 | ret = min(ret, remaining); |
| 517 | cp += ret; |
| 518 | } |
| 519 | |
| 520 | if (logger_list->mode & ANDROID_LOG_NONBLOCK) { |
| 521 | /* Deal with an unresponsive logd */ |
| 522 | memset(&ignore, 0, sizeof(ignore)); |
| 523 | ignore.sa_handler = caught_signal; |
| 524 | sigemptyset(&ignore.sa_mask); |
| 525 | /* particularily useful if tombstone is reporting for logd */ |
| 526 | sigaction(SIGALRM, &ignore, &old_sigaction); |
| 527 | old_alarm = alarm(30); |
| 528 | } |
| 529 | ret = write(sock, buffer, cp - buffer); |
| 530 | e = errno; |
| 531 | if (logger_list->mode & ANDROID_LOG_NONBLOCK) { |
| 532 | if (e == EINTR) { |
| 533 | e = ETIMEDOUT; |
| 534 | } |
| 535 | alarm(old_alarm); |
| 536 | sigaction(SIGALRM, &old_sigaction, NULL); |
| 537 | } |
| 538 | |
| 539 | if (ret <= 0) { |
| 540 | close(sock); |
| 541 | if ((ret == -1) && e) { |
| 542 | return -e; |
| 543 | } |
| 544 | if (ret == 0) { |
| 545 | return -EIO; |
| 546 | } |
| 547 | return ret; |
| 548 | } |
| 549 | |
| 550 | ret = atomic_exchange(&transp->context.sock, sock); |
| 551 | if ((ret > 0) && (ret != sock)) { |
| 552 | close(ret); |
| 553 | } |
| 554 | return sock; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 555 | } |
| 556 | |
| 557 | /* Read from the selected logs */ |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 558 | static int logdRead(struct android_log_logger_list* logger_list, |
Tom Cherry | 71ba164 | 2019-01-10 10:37:36 -0800 | [diff] [blame] | 559 | struct android_log_transport_context* transp, struct log_msg* log_msg) { |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 560 | int ret, e; |
| 561 | struct sigaction ignore; |
| 562 | struct sigaction old_sigaction; |
| 563 | unsigned int old_alarm = 0; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 564 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 565 | ret = logdOpen(logger_list, transp); |
| 566 | if (ret < 0) { |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 567 | return ret; |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 568 | } |
| 569 | |
| 570 | memset(log_msg, 0, sizeof(*log_msg)); |
| 571 | |
Alan Stokes | 64acdf7 | 2017-08-01 16:43:02 +0100 | [diff] [blame] | 572 | unsigned int new_alarm = 0; |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 573 | if (logger_list->mode & ANDROID_LOG_NONBLOCK) { |
Alan Stokes | 64acdf7 | 2017-08-01 16:43:02 +0100 | [diff] [blame] | 574 | if ((logger_list->mode & ANDROID_LOG_WRAP) && |
| 575 | (logger_list->start.tv_sec || logger_list->start.tv_nsec)) { |
| 576 | /* b/64143705 */ |
| 577 | new_alarm = (ANDROID_LOG_WRAP_DEFAULT_TIMEOUT * 11) / 10 + 10; |
| 578 | logger_list->mode &= ~ANDROID_LOG_WRAP; |
| 579 | } else { |
| 580 | new_alarm = 30; |
| 581 | } |
| 582 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 583 | memset(&ignore, 0, sizeof(ignore)); |
| 584 | ignore.sa_handler = caught_signal; |
| 585 | sigemptyset(&ignore.sa_mask); |
| 586 | /* particularily useful if tombstone is reporting for logd */ |
| 587 | sigaction(SIGALRM, &ignore, &old_sigaction); |
Alan Stokes | 64acdf7 | 2017-08-01 16:43:02 +0100 | [diff] [blame] | 588 | old_alarm = alarm(new_alarm); |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 589 | } |
| 590 | |
| 591 | /* NOTE: SOCK_SEQPACKET guarantees we read exactly one full entry */ |
| 592 | ret = recv(ret, log_msg, LOGGER_ENTRY_MAX_LEN, 0); |
| 593 | e = errno; |
| 594 | |
Alan Stokes | 64acdf7 | 2017-08-01 16:43:02 +0100 | [diff] [blame] | 595 | if (new_alarm) { |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 596 | if ((ret == 0) || (e == EINTR)) { |
| 597 | e = EAGAIN; |
| 598 | ret = -1; |
| 599 | } |
| 600 | alarm(old_alarm); |
| 601 | sigaction(SIGALRM, &old_sigaction, NULL); |
| 602 | } |
| 603 | |
| 604 | if ((ret == -1) && e) { |
| 605 | return -e; |
| 606 | } |
| 607 | return ret; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 608 | } |
| 609 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 610 | static int logdPoll(struct android_log_logger_list* logger_list, |
| 611 | struct android_log_transport_context* transp) { |
| 612 | struct pollfd p; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 613 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 614 | int ret = logdOpen(logger_list, transp); |
| 615 | if (ret < 0) { |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 616 | return ret; |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 617 | } |
| 618 | |
| 619 | memset(&p, 0, sizeof(p)); |
| 620 | p.fd = ret; |
| 621 | p.events = POLLIN; |
| 622 | ret = poll(&p, 1, 20); |
| 623 | if ((ret > 0) && !(p.revents & POLLIN)) { |
| 624 | ret = 0; |
| 625 | } |
| 626 | if ((ret == -1) && errno) { |
| 627 | return -errno; |
| 628 | } |
| 629 | return ret; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 630 | } |
| 631 | |
| 632 | /* Close all the logs */ |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 633 | static void logdClose(struct android_log_logger_list* logger_list __unused, |
| 634 | struct android_log_transport_context* transp) { |
| 635 | int sock = atomic_exchange(&transp->context.sock, -1); |
| 636 | if (sock > 0) { |
| 637 | close(sock); |
| 638 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 639 | } |