Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 1 | /* |
Mark Salyzyn | d0a83fd | 2014-01-09 07:45:30 -0800 | [diff] [blame] | 2 | ** Copyright 2013-2014, The Android Open Source Project |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 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 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 17 | #include <errno.h> |
| 18 | #include <fcntl.h> |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 19 | #include <signal.h> |
| 20 | #include <stddef.h> |
| 21 | #define NOMINMAX /* for windows to suppress definition of min in stdlib.h */ |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 22 | #include <stdlib.h> |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 23 | #include <string.h> |
| 24 | #include <unistd.h> |
| 25 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 26 | #include <cutils/list.h> |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 27 | #include <cutils/sockets.h> |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 28 | #include <log/log.h> |
| 29 | #include <log/logger.h> |
| 30 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 31 | /* branchless on many architectures. */ |
| 32 | #define min(x,y) ((y) ^ (((x) ^ (y)) & -((x) < (y)))) |
Mark Salyzyn | 1345f38 | 2014-01-14 08:41:27 -0800 | [diff] [blame] | 33 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 34 | #define WEAK __attribute__((weak)) |
| 35 | #define UNUSED __attribute__((unused)) |
Mark Salyzyn | 1345f38 | 2014-01-14 08:41:27 -0800 | [diff] [blame] | 36 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 37 | /* Private copy of ../libcutils/socket_local_client.c prevent library loops */ |
Mark Salyzyn | 1345f38 | 2014-01-14 08:41:27 -0800 | [diff] [blame] | 38 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 39 | #ifdef HAVE_WINSOCK |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 40 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 41 | int WEAK socket_local_client(const char *name, int namespaceId, int type) |
| 42 | { |
| 43 | errno = ENOSYS; |
| 44 | return -ENOSYS; |
| 45 | } |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 46 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 47 | #else /* !HAVE_WINSOCK */ |
| 48 | |
| 49 | #include <sys/socket.h> |
| 50 | #include <sys/un.h> |
| 51 | #include <sys/select.h> |
| 52 | #include <sys/types.h> |
| 53 | |
| 54 | /* Private copy of ../libcutils/socket_local.h prevent library loops */ |
| 55 | #define FILESYSTEM_SOCKET_PREFIX "/tmp/" |
| 56 | #define ANDROID_RESERVED_SOCKET_PREFIX "/dev/socket/" |
| 57 | /* End of ../libcutils/socket_local.h */ |
| 58 | |
| 59 | #define LISTEN_BACKLOG 4 |
| 60 | |
| 61 | /* Documented in header file. */ |
| 62 | int WEAK socket_make_sockaddr_un(const char *name, int namespaceId, |
| 63 | struct sockaddr_un *p_addr, socklen_t *alen) |
| 64 | { |
| 65 | memset (p_addr, 0, sizeof (*p_addr)); |
| 66 | size_t namelen; |
| 67 | |
| 68 | switch (namespaceId) { |
| 69 | case ANDROID_SOCKET_NAMESPACE_ABSTRACT: |
| 70 | #ifdef HAVE_LINUX_LOCAL_SOCKET_NAMESPACE |
| 71 | namelen = strlen(name); |
| 72 | |
| 73 | /* Test with length +1 for the *initial* '\0'. */ |
| 74 | if ((namelen + 1) > sizeof(p_addr->sun_path)) { |
| 75 | goto error; |
| 76 | } |
| 77 | |
| 78 | /* |
| 79 | * Note: The path in this case is *not* supposed to be |
| 80 | * '\0'-terminated. ("man 7 unix" for the gory details.) |
| 81 | */ |
| 82 | |
| 83 | p_addr->sun_path[0] = 0; |
| 84 | memcpy(p_addr->sun_path + 1, name, namelen); |
| 85 | #else /*HAVE_LINUX_LOCAL_SOCKET_NAMESPACE*/ |
| 86 | /* this OS doesn't have the Linux abstract namespace */ |
| 87 | |
| 88 | namelen = strlen(name) + strlen(FILESYSTEM_SOCKET_PREFIX); |
| 89 | /* unix_path_max appears to be missing on linux */ |
| 90 | if (namelen > sizeof(*p_addr) |
| 91 | - offsetof(struct sockaddr_un, sun_path) - 1) { |
| 92 | goto error; |
| 93 | } |
| 94 | |
| 95 | strcpy(p_addr->sun_path, FILESYSTEM_SOCKET_PREFIX); |
| 96 | strcat(p_addr->sun_path, name); |
| 97 | #endif /*HAVE_LINUX_LOCAL_SOCKET_NAMESPACE*/ |
| 98 | break; |
| 99 | |
| 100 | case ANDROID_SOCKET_NAMESPACE_RESERVED: |
| 101 | namelen = strlen(name) + strlen(ANDROID_RESERVED_SOCKET_PREFIX); |
| 102 | /* unix_path_max appears to be missing on linux */ |
| 103 | if (namelen > sizeof(*p_addr) |
| 104 | - offsetof(struct sockaddr_un, sun_path) - 1) { |
| 105 | goto error; |
| 106 | } |
| 107 | |
| 108 | strcpy(p_addr->sun_path, ANDROID_RESERVED_SOCKET_PREFIX); |
| 109 | strcat(p_addr->sun_path, name); |
| 110 | break; |
| 111 | |
| 112 | case ANDROID_SOCKET_NAMESPACE_FILESYSTEM: |
| 113 | namelen = strlen(name); |
| 114 | /* unix_path_max appears to be missing on linux */ |
| 115 | if (namelen > sizeof(*p_addr) |
| 116 | - offsetof(struct sockaddr_un, sun_path) - 1) { |
| 117 | goto error; |
| 118 | } |
| 119 | |
| 120 | strcpy(p_addr->sun_path, name); |
| 121 | break; |
| 122 | |
| 123 | default: |
| 124 | /* invalid namespace id */ |
| 125 | return -1; |
| 126 | } |
| 127 | |
| 128 | p_addr->sun_family = AF_LOCAL; |
| 129 | *alen = namelen + offsetof(struct sockaddr_un, sun_path) + 1; |
| 130 | return 0; |
| 131 | error: |
| 132 | return -1; |
| 133 | } |
| 134 | |
| 135 | /** |
| 136 | * connect to peer named "name" on fd |
| 137 | * returns same fd or -1 on error. |
| 138 | * fd is not closed on error. that's your job. |
| 139 | * |
| 140 | * Used by AndroidSocketImpl |
| 141 | */ |
| 142 | int WEAK socket_local_client_connect(int fd, const char *name, int namespaceId, |
| 143 | int type UNUSED) |
| 144 | { |
| 145 | struct sockaddr_un addr; |
| 146 | socklen_t alen; |
| 147 | size_t namelen; |
| 148 | int err; |
| 149 | |
| 150 | err = socket_make_sockaddr_un(name, namespaceId, &addr, &alen); |
| 151 | |
| 152 | if (err < 0) { |
| 153 | goto error; |
| 154 | } |
| 155 | |
| 156 | if(connect(fd, (struct sockaddr *) &addr, alen) < 0) { |
| 157 | goto error; |
| 158 | } |
| 159 | |
| 160 | return fd; |
| 161 | |
| 162 | error: |
| 163 | return -1; |
| 164 | } |
| 165 | |
| 166 | /** |
| 167 | * connect to peer named "name" |
| 168 | * returns fd or -1 on error |
| 169 | */ |
| 170 | int WEAK socket_local_client(const char *name, int namespaceId, int type) |
| 171 | { |
| 172 | int s; |
| 173 | |
| 174 | s = socket(AF_LOCAL, type, 0); |
| 175 | if(s < 0) return -1; |
| 176 | |
| 177 | if ( 0 > socket_local_client_connect(s, name, namespaceId, type)) { |
| 178 | close(s); |
| 179 | return -1; |
| 180 | } |
| 181 | |
| 182 | return s; |
| 183 | } |
| 184 | |
| 185 | #endif /* !HAVE_WINSOCK */ |
| 186 | /* End of ../libcutils/socket_local_client.c */ |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 187 | |
| 188 | #define logger_for_each(logger, logger_list) \ |
| 189 | for (logger = node_to_item((logger_list)->node.next, struct logger, node); \ |
| 190 | logger != node_to_item(&(logger_list)->node, struct logger, node); \ |
| 191 | logger = node_to_item((logger)->node.next, struct logger, node)) |
| 192 | |
| 193 | /* In the future, we would like to make this list extensible */ |
| 194 | static const char *LOG_NAME[LOG_ID_MAX] = { |
| 195 | [LOG_ID_MAIN] = "main", |
| 196 | [LOG_ID_RADIO] = "radio", |
| 197 | [LOG_ID_EVENTS] = "events", |
| 198 | [LOG_ID_SYSTEM] = "system" |
| 199 | }; |
| 200 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 201 | const char *android_log_id_to_name(log_id_t log_id) |
| 202 | { |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 203 | if (log_id >= LOG_ID_MAX) { |
| 204 | log_id = LOG_ID_MAIN; |
| 205 | } |
| 206 | return LOG_NAME[log_id]; |
| 207 | } |
| 208 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 209 | log_id_t android_name_to_log_id(const char *logName) |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 210 | { |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 211 | const char *b; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 212 | int ret; |
| 213 | |
| 214 | if (!logName) { |
| 215 | return -1; /* NB: log_id_t is unsigned */ |
| 216 | } |
| 217 | b = strrchr(logName, '/'); |
| 218 | if (!b) { |
| 219 | b = logName; |
| 220 | } else { |
| 221 | ++b; |
| 222 | } |
| 223 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 224 | for(ret = LOG_ID_MIN; ret < LOG_ID_MAX; ++ret) { |
| 225 | const char *l = LOG_NAME[ret]; |
| 226 | if (l && !strcmp(b, l)) { |
| 227 | return ret; |
| 228 | } |
| 229 | } |
| 230 | return -1; /* should never happen */ |
| 231 | } |
| 232 | |
| 233 | struct logger_list { |
| 234 | struct listnode node; |
| 235 | int mode; |
| 236 | unsigned int tail; |
| 237 | pid_t pid; |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 238 | int sock; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 239 | }; |
| 240 | |
| 241 | struct logger { |
| 242 | struct listnode node; |
| 243 | struct logger_list *top; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 244 | log_id_t id; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 245 | }; |
| 246 | |
| 247 | /* android_logger_alloc unimplemented, no use case */ |
| 248 | /* android_logger_free not exported */ |
| 249 | static void android_logger_free(struct logger *logger) |
| 250 | { |
| 251 | if (!logger) { |
| 252 | return; |
| 253 | } |
| 254 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 255 | list_remove(&logger->node); |
| 256 | |
| 257 | free(logger); |
| 258 | } |
| 259 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 260 | /* android_logger_alloc unimplemented, no use case */ |
| 261 | |
| 262 | /* method for getting the associated sublog id */ |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 263 | log_id_t android_logger_get_id(struct logger *logger) |
| 264 | { |
| 265 | return logger->id; |
| 266 | } |
| 267 | |
| 268 | /* worker for sending the command to the logger */ |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 269 | static ssize_t send_log_msg(struct logger *logger, |
| 270 | const char *msg, char *buf, size_t buf_size) |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 271 | { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 272 | ssize_t ret; |
| 273 | int sock = socket_local_client("logd", ANDROID_SOCKET_NAMESPACE_RESERVED, |
| 274 | SOCK_STREAM); |
| 275 | if (sock < 0) { |
| 276 | ret = sock; |
| 277 | goto done; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 278 | } |
| 279 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 280 | if (msg) { |
| 281 | snprintf(buf, buf_size, msg, logger ? logger->id : (unsigned) -1); |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 282 | } |
| 283 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 284 | ret = write(sock, buf, strlen(buf) + 1); |
| 285 | if (ret <= 0) { |
| 286 | goto done; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 287 | } |
| 288 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 289 | ret = read(sock, buf, buf_size); |
| 290 | |
| 291 | done: |
| 292 | if ((ret == -1) && errno) { |
| 293 | ret = -errno; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 294 | } |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 295 | close(sock); |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 296 | return ret; |
| 297 | } |
| 298 | |
| 299 | int android_logger_clear(struct logger *logger) |
| 300 | { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 301 | char buf[512]; |
| 302 | |
| 303 | ssize_t ret = send_log_msg(logger, "clear %d", buf, sizeof(buf)); |
| 304 | if (ret < 0) { |
| 305 | return ret; |
| 306 | } |
| 307 | |
| 308 | if (strncmp(buf, "success", 7)) { |
| 309 | return -1; |
| 310 | } |
| 311 | |
| 312 | return 0; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 313 | } |
| 314 | |
| 315 | /* returns the total size of the log's ring buffer */ |
| 316 | int android_logger_get_log_size(struct logger *logger) |
| 317 | { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 318 | char buf[512]; |
| 319 | |
| 320 | ssize_t ret = send_log_msg(logger, "getLogSize %d", buf, sizeof(buf)); |
| 321 | if (ret < 0) { |
| 322 | return ret; |
| 323 | } |
| 324 | |
| 325 | if ((buf[0] < '0') || ('9' < buf[0])) { |
| 326 | return -1; |
| 327 | } |
| 328 | |
| 329 | return atoi(buf); |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 330 | } |
| 331 | |
| 332 | /* |
| 333 | * returns the readable size of the log's ring buffer (that is, amount of the |
| 334 | * log consumed) |
| 335 | */ |
| 336 | int android_logger_get_log_readable_size(struct logger *logger) |
| 337 | { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 338 | char buf[512]; |
| 339 | |
| 340 | ssize_t ret = send_log_msg(logger, "getLogSizeUsed %d", buf, sizeof(buf)); |
| 341 | if (ret < 0) { |
| 342 | return ret; |
| 343 | } |
| 344 | |
| 345 | if ((buf[0] < '0') || ('9' < buf[0])) { |
| 346 | return -1; |
| 347 | } |
| 348 | |
| 349 | return atoi(buf); |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 350 | } |
| 351 | |
| 352 | /* |
| 353 | * returns the logger version |
| 354 | */ |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 355 | int android_logger_get_log_version(struct logger *logger UNUSED) |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 356 | { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 357 | return 3; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 358 | } |
| 359 | |
Mark Salyzyn | 34facab | 2014-02-06 14:48:50 -0800 | [diff] [blame^] | 360 | /* |
| 361 | * returns statistics |
| 362 | */ |
| 363 | ssize_t android_logger_get_statistics(struct logger_list *logger_list, |
| 364 | char *buf, size_t len) |
| 365 | { |
| 366 | struct listnode *node; |
| 367 | struct logger *logger; |
| 368 | char *cp = buf; |
| 369 | size_t remaining = len; |
| 370 | size_t n; |
| 371 | |
| 372 | n = snprintf(cp, remaining, "getStatistics"); |
| 373 | n = min(n, remaining); |
| 374 | remaining -= n; |
| 375 | cp += n; |
| 376 | |
| 377 | logger_for_each(logger, logger_list) { |
| 378 | n = snprintf(cp, remaining, " %d", logger->id); |
| 379 | n = min(n, remaining); |
| 380 | remaining -= n; |
| 381 | cp += n; |
| 382 | } |
| 383 | return send_log_msg(NULL, NULL, buf, len); |
| 384 | } |
| 385 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 386 | struct logger_list *android_logger_list_alloc(int mode, |
| 387 | unsigned int tail, |
| 388 | pid_t pid) |
| 389 | { |
| 390 | struct logger_list *logger_list; |
| 391 | |
| 392 | logger_list = calloc(1, sizeof(*logger_list)); |
| 393 | if (!logger_list) { |
| 394 | return NULL; |
| 395 | } |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 396 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 397 | list_init(&logger_list->node); |
| 398 | logger_list->mode = mode; |
| 399 | logger_list->tail = tail; |
| 400 | logger_list->pid = pid; |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 401 | logger_list->sock = -1; |
| 402 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 403 | return logger_list; |
| 404 | } |
| 405 | |
| 406 | /* android_logger_list_register unimplemented, no use case */ |
| 407 | /* android_logger_list_unregister unimplemented, no use case */ |
| 408 | |
| 409 | /* Open the named log and add it to the logger list */ |
| 410 | struct logger *android_logger_open(struct logger_list *logger_list, |
| 411 | log_id_t id) |
| 412 | { |
| 413 | struct listnode *node; |
| 414 | struct logger *logger; |
| 415 | char *n; |
| 416 | |
| 417 | if (!logger_list || (id >= LOG_ID_MAX)) { |
| 418 | goto err; |
| 419 | } |
| 420 | |
| 421 | logger_for_each(logger, logger_list) { |
| 422 | if (logger->id == id) { |
| 423 | goto ok; |
| 424 | } |
| 425 | } |
| 426 | |
| 427 | logger = calloc(1, sizeof(*logger)); |
| 428 | if (!logger) { |
| 429 | goto err; |
| 430 | } |
| 431 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 432 | logger->id = id; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 433 | list_add_tail(&logger_list->node, &logger->node); |
| 434 | logger->top = logger_list; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 435 | goto ok; |
| 436 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 437 | err: |
| 438 | logger = NULL; |
| 439 | ok: |
| 440 | return logger; |
| 441 | } |
| 442 | |
| 443 | /* Open the single named log and make it part of a new logger list */ |
| 444 | struct logger_list *android_logger_list_open(log_id_t id, |
| 445 | int mode, |
| 446 | unsigned int tail, |
| 447 | pid_t pid) |
| 448 | { |
| 449 | struct logger_list *logger_list = android_logger_list_alloc(mode, tail, pid); |
| 450 | if (!logger_list) { |
| 451 | return NULL; |
| 452 | } |
| 453 | |
| 454 | if (!android_logger_open(logger_list, id)) { |
| 455 | android_logger_list_free(logger_list); |
| 456 | return NULL; |
| 457 | } |
| 458 | |
| 459 | return logger_list; |
| 460 | } |
| 461 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 462 | static void caught_signal(int signum UNUSED) |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 463 | { |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | /* Read from the selected logs */ |
| 467 | int android_logger_list_read(struct logger_list *logger_list, |
| 468 | struct log_msg *log_msg) |
| 469 | { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 470 | int ret, e; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 471 | struct logger *logger; |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 472 | struct sigaction ignore; |
| 473 | struct sigaction old_sigaction; |
| 474 | unsigned int old_alarm = 0; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 475 | |
| 476 | if (!logger_list) { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 477 | return -EINVAL; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 478 | } |
| 479 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 480 | if (logger_list->mode & O_NONBLOCK) { |
| 481 | memset(&ignore, 0, sizeof(ignore)); |
| 482 | ignore.sa_handler = caught_signal; |
| 483 | sigemptyset(&ignore.sa_mask); |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 484 | } |
| 485 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 486 | if (logger_list->sock < 0) { |
| 487 | char buffer[256], *cp, c; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 488 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 489 | int sock = socket_local_client("logdr", |
| 490 | ANDROID_SOCKET_NAMESPACE_RESERVED, |
| 491 | SOCK_SEQPACKET); |
| 492 | if (sock < 0) { |
| 493 | if ((sock == -1) && errno) { |
| 494 | return -errno; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 495 | } |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 496 | return sock; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 497 | } |
| 498 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 499 | strcpy(buffer, |
| 500 | (logger_list->mode & O_NONBLOCK) ? "dumpAndClose" : "stream"); |
| 501 | cp = buffer + strlen(buffer); |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 502 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 503 | strcpy(cp, " lids"); |
| 504 | cp += 5; |
| 505 | c = '='; |
| 506 | int remaining = sizeof(buffer) - (cp - buffer); |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 507 | logger_for_each(logger, logger_list) { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 508 | ret = snprintf(cp, remaining, "%c%u", c, logger->id); |
| 509 | ret = min(ret, remaining); |
| 510 | remaining -= ret; |
| 511 | cp += ret; |
| 512 | c = ','; |
| 513 | } |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 514 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 515 | if (logger_list->tail) { |
| 516 | ret = snprintf(cp, remaining, " tail=%u", logger_list->tail); |
| 517 | ret = min(ret, remaining); |
| 518 | remaining -= ret; |
| 519 | cp += ret; |
| 520 | } |
| 521 | |
| 522 | if (logger_list->pid) { |
| 523 | ret = snprintf(cp, remaining, " pid=%u", logger_list->pid); |
| 524 | ret = min(ret, remaining); |
| 525 | remaining -= ret; |
| 526 | cp += ret; |
| 527 | } |
| 528 | |
| 529 | if (logger_list->mode & O_NONBLOCK) { |
| 530 | /* Deal with an unresponsive logd */ |
| 531 | sigaction(SIGALRM, &ignore, &old_sigaction); |
| 532 | old_alarm = alarm(30); |
| 533 | } |
| 534 | ret = write(sock, buffer, cp - buffer); |
| 535 | e = errno; |
| 536 | if (logger_list->mode & O_NONBLOCK) { |
| 537 | if (e == EINTR) { |
| 538 | e = ETIMEDOUT; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 539 | } |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 540 | alarm(old_alarm); |
| 541 | sigaction(SIGALRM, &old_sigaction, NULL); |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 542 | } |
| 543 | |
| 544 | if (ret <= 0) { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 545 | close(sock); |
| 546 | if ((ret == -1) && e) { |
| 547 | return -e; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 548 | } |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 549 | if (ret == 0) { |
| 550 | return -EIO; |
| 551 | } |
| 552 | return ret; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 553 | } |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 554 | |
| 555 | logger_list->sock = sock; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 556 | } |
| 557 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 558 | ret = 0; |
| 559 | while(1) { |
| 560 | memset(log_msg, 0, sizeof(*log_msg)); |
| 561 | |
| 562 | if (logger_list->mode & O_NONBLOCK) { |
| 563 | /* particularily useful if tombstone is reporting for logd */ |
| 564 | sigaction(SIGALRM, &ignore, &old_sigaction); |
| 565 | old_alarm = alarm(30); |
| 566 | } |
| 567 | /* NOTE: SOCK_SEQPACKET guarantees we read exactly one full entry */ |
| 568 | ret = recv(logger_list->sock, log_msg, LOGGER_ENTRY_MAX_LEN, 0); |
| 569 | e = errno; |
| 570 | if (logger_list->mode & O_NONBLOCK) { |
| 571 | if ((ret == 0) || (e == EINTR)) { |
| 572 | e = EAGAIN; |
| 573 | ret = -1; |
| 574 | } |
| 575 | alarm(old_alarm); |
| 576 | sigaction(SIGALRM, &old_sigaction, NULL); |
| 577 | } |
| 578 | |
| 579 | if (ret <= 0) { |
| 580 | if ((ret == -1) && e) { |
| 581 | return -e; |
| 582 | } |
| 583 | return ret; |
| 584 | } |
| 585 | |
| 586 | logger_for_each(logger, logger_list) { |
| 587 | if (log_msg->entry.lid == logger->id) { |
| 588 | return ret; |
| 589 | } |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 590 | } |
| 591 | } |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 592 | /* NOTREACH */ |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 593 | return ret; |
| 594 | } |
| 595 | |
| 596 | /* Close all the logs */ |
| 597 | void android_logger_list_free(struct logger_list *logger_list) |
| 598 | { |
| 599 | if (logger_list == NULL) { |
| 600 | return; |
| 601 | } |
| 602 | |
| 603 | while (!list_empty(&logger_list->node)) { |
| 604 | struct listnode *node = list_head(&logger_list->node); |
| 605 | struct logger *logger = node_to_item(node, struct logger, node); |
| 606 | android_logger_free(logger); |
| 607 | } |
| 608 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 609 | if (logger_list->sock >= 0) { |
| 610 | close (logger_list->sock); |
| 611 | } |
| 612 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 613 | free(logger_list); |
| 614 | } |