Mark Salyzyn | c5ae20f | 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 <errno.h> |
| 18 | #include <stdatomic.h> |
| 19 | #include <stdlib.h> |
| 20 | #include <string.h> |
| 21 | #include <sys/time.h> |
| 22 | |
| 23 | #ifdef __BIONIC__ |
| 24 | #include <android/set_abort_message.h> |
| 25 | #endif |
| 26 | |
| 27 | #include <log/event_tag_map.h> |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 28 | #include <private/android_filesystem_config.h> |
| 29 | #include <private/android_logger.h> |
| 30 | |
| 31 | #include "config_write.h" |
| 32 | #include "log_portability.h" |
| 33 | #include "logger.h" |
| 34 | |
| 35 | #define LOG_BUF_SIZE 1024 |
| 36 | |
| 37 | static int __write_to_log_init(log_id_t, struct iovec *vec, size_t nr); |
| 38 | static int (*write_to_log)(log_id_t, struct iovec *vec, size_t nr) = __write_to_log_init; |
| 39 | |
| 40 | /* |
| 41 | * This is used by the C++ code to decide if it should write logs through |
| 42 | * the C code. Basically, if /dev/socket/logd is available, we're running in |
| 43 | * the simulator rather than a desktop tool and want to use the device. |
| 44 | */ |
| 45 | static enum { |
| 46 | kLogUninitialized, kLogNotAvailable, kLogAvailable |
| 47 | } g_log_status = kLogUninitialized; |
| 48 | |
Mark Salyzyn | ef5a14e | 2016-03-28 16:20:29 -0700 | [diff] [blame] | 49 | static int check_log_uid_permissions() |
| 50 | { |
| 51 | #if defined(__BIONIC__) |
| 52 | uid_t uid = __android_log_uid(); |
| 53 | |
| 54 | /* Matches clientHasLogCredentials() in logd */ |
| 55 | if ((uid != AID_SYSTEM) && (uid != AID_ROOT) && (uid != AID_LOG)) { |
| 56 | uid = geteuid(); |
| 57 | if ((uid != AID_SYSTEM) && (uid != AID_ROOT) && (uid != AID_LOG)) { |
| 58 | gid_t gid = getgid(); |
| 59 | if ((gid != AID_SYSTEM) && |
| 60 | (gid != AID_ROOT) && |
| 61 | (gid != AID_LOG)) { |
| 62 | gid = getegid(); |
| 63 | if ((gid != AID_SYSTEM) && |
| 64 | (gid != AID_ROOT) && |
| 65 | (gid != AID_LOG)) { |
| 66 | int num_groups; |
| 67 | gid_t *groups; |
| 68 | |
| 69 | num_groups = getgroups(0, NULL); |
| 70 | if (num_groups <= 0) { |
| 71 | return -EPERM; |
| 72 | } |
| 73 | groups = calloc(num_groups, sizeof(gid_t)); |
| 74 | if (!groups) { |
| 75 | return -ENOMEM; |
| 76 | } |
| 77 | num_groups = getgroups(num_groups, groups); |
| 78 | while (num_groups > 0) { |
| 79 | if (groups[num_groups - 1] == AID_LOG) { |
| 80 | break; |
| 81 | } |
| 82 | --num_groups; |
| 83 | } |
| 84 | free(groups); |
| 85 | if (num_groups <= 0) { |
| 86 | return -EPERM; |
| 87 | } |
| 88 | } |
| 89 | } |
| 90 | } |
| 91 | } |
| 92 | #endif |
| 93 | return 0; |
| 94 | } |
| 95 | |
| 96 | static void __android_log_cache_available( |
| 97 | struct android_log_transport_write *node) |
| 98 | { |
| 99 | size_t i; |
| 100 | |
| 101 | if (node->logMask) { |
| 102 | return; |
| 103 | } |
| 104 | |
| 105 | for (i = LOG_ID_MIN; i < LOG_ID_MAX; ++i) { |
| 106 | if (node->write && |
| 107 | (i != LOG_ID_KERNEL) && |
| 108 | ((i != LOG_ID_SECURITY) || |
| 109 | (check_log_uid_permissions() == 0)) && |
| 110 | (!node->available || ((*node->available)(i) >= 0))) { |
| 111 | node->logMask |= 1 << i; |
| 112 | } |
| 113 | } |
| 114 | } |
| 115 | |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 116 | LIBLOG_ABI_PUBLIC int __android_log_dev_available() |
| 117 | { |
| 118 | struct android_log_transport_write *node; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 119 | |
| 120 | if (list_empty(&__android_log_transport_write)) { |
| 121 | return kLogUninitialized; |
| 122 | } |
Mark Salyzyn | ef5a14e | 2016-03-28 16:20:29 -0700 | [diff] [blame] | 123 | |
| 124 | write_transport_for_each(node, &__android_log_transport_write) { |
| 125 | __android_log_cache_available(node); |
| 126 | if (node->logMask) { |
| 127 | return kLogAvailable; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 128 | } |
| 129 | } |
| 130 | return kLogNotAvailable; |
| 131 | } |
Mark Salyzyn | 0a9c0b9 | 2016-09-13 07:28:21 -0700 | [diff] [blame] | 132 | |
| 133 | #if defined(__BIONIC__) |
| 134 | static atomic_uintptr_t tagMap; |
| 135 | #endif |
| 136 | |
Mark Salyzyn | 67dc748 | 2016-08-23 10:23:36 -0700 | [diff] [blame] | 137 | /* |
| 138 | * Release any logger resources. A new log write will immediately re-acquire. |
| 139 | */ |
| 140 | LIBLOG_ABI_PUBLIC void __android_log_close() |
| 141 | { |
| 142 | struct android_log_transport_write *transport; |
Mark Salyzyn | 0a9c0b9 | 2016-09-13 07:28:21 -0700 | [diff] [blame] | 143 | #if defined(__BIONIC__) |
| 144 | EventTagMap *m; |
| 145 | #endif |
Mark Salyzyn | 67dc748 | 2016-08-23 10:23:36 -0700 | [diff] [blame] | 146 | |
| 147 | __android_log_lock(); |
| 148 | |
| 149 | write_to_log = __write_to_log_init; |
| 150 | |
| 151 | /* |
| 152 | * Threads that are actively writing at this point are not held back |
| 153 | * by a lock and are at risk of dropping the messages with a return code |
| 154 | * -EBADF. Prefer to return error code than add the overhead of a lock to |
| 155 | * each log writing call to guarantee delivery. In addition, anyone |
| 156 | * calling this is doing so to release the logging resources and shut down, |
| 157 | * for them to do so with outstanding log requests in other threads is a |
| 158 | * disengenuous use of this function. |
| 159 | */ |
| 160 | |
| 161 | write_transport_for_each(transport, &__android_log_persist_write) { |
| 162 | if (transport->close) { |
| 163 | (*transport->close)(); |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | write_transport_for_each(transport, &__android_log_transport_write) { |
| 168 | if (transport->close) { |
| 169 | (*transport->close)(); |
| 170 | } |
| 171 | } |
| 172 | |
Mark Salyzyn | 0a9c0b9 | 2016-09-13 07:28:21 -0700 | [diff] [blame] | 173 | #if defined(__BIONIC__) |
| 174 | /* |
| 175 | * Additional risk here somewhat mitigated by immediately unlock flushing |
| 176 | * the processor cache. The multi-threaded race that we choose to accept, |
| 177 | * to minimize locking, is an atomic_load in a writer picking up a value |
| 178 | * just prior to entering this routine. There will be an use after free. |
| 179 | * |
| 180 | * Again, anyone calling this is doing so to release the logging resources |
| 181 | * is most probably going to quiesce then shut down; or to restart after |
| 182 | * a fork so the risk should be non-existent. For this reason we |
| 183 | * choose a mitigation stance for efficiency instead of incuring the cost |
| 184 | * of a lock for every log write. |
| 185 | */ |
| 186 | m = (EventTagMap *)atomic_exchange(&tagMap, (uintptr_t)0); |
| 187 | #endif |
| 188 | |
Mark Salyzyn | 67dc748 | 2016-08-23 10:23:36 -0700 | [diff] [blame] | 189 | __android_log_unlock(); |
Mark Salyzyn | 0a9c0b9 | 2016-09-13 07:28:21 -0700 | [diff] [blame] | 190 | |
| 191 | #if defined(__BIONIC__) |
Mark Salyzyn | 75da0c5 | 2016-11-09 10:14:35 -0800 | [diff] [blame] | 192 | if (m != (EventTagMap *)(uintptr_t)-1LL) android_closeEventTagMap(m); |
Mark Salyzyn | 0a9c0b9 | 2016-09-13 07:28:21 -0700 | [diff] [blame] | 193 | #endif |
| 194 | |
Mark Salyzyn | 67dc748 | 2016-08-23 10:23:36 -0700 | [diff] [blame] | 195 | } |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 196 | |
| 197 | /* log_init_lock assumed */ |
| 198 | static int __write_to_log_initialize() |
| 199 | { |
| 200 | struct android_log_transport_write *transport; |
| 201 | struct listnode *n; |
| 202 | int i = 0, ret = 0; |
| 203 | |
| 204 | __android_log_config_write(); |
| 205 | write_transport_for_each_safe(transport, n, &__android_log_transport_write) { |
Mark Salyzyn | ef5a14e | 2016-03-28 16:20:29 -0700 | [diff] [blame] | 206 | __android_log_cache_available(transport); |
| 207 | if (!transport->logMask) { |
| 208 | list_remove(&transport->node); |
| 209 | continue; |
| 210 | } |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 211 | if (!transport->open || ((*transport->open)() < 0)) { |
| 212 | if (transport->close) { |
| 213 | (*transport->close)(); |
| 214 | } |
| 215 | list_remove(&transport->node); |
| 216 | continue; |
| 217 | } |
| 218 | ++ret; |
| 219 | } |
| 220 | write_transport_for_each_safe(transport, n, &__android_log_persist_write) { |
Mark Salyzyn | ef5a14e | 2016-03-28 16:20:29 -0700 | [diff] [blame] | 221 | __android_log_cache_available(transport); |
| 222 | if (!transport->logMask) { |
| 223 | list_remove(&transport->node); |
| 224 | continue; |
| 225 | } |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 226 | if (!transport->open || ((*transport->open)() < 0)) { |
| 227 | if (transport->close) { |
| 228 | (*transport->close)(); |
| 229 | } |
| 230 | list_remove(&transport->node); |
| 231 | continue; |
| 232 | } |
| 233 | ++i; |
| 234 | } |
| 235 | if (!ret && !i) { |
| 236 | return -ENODEV; |
| 237 | } |
| 238 | |
| 239 | return ret; |
| 240 | } |
| 241 | |
| 242 | /* |
| 243 | * Extract a 4-byte value from a byte stream. le32toh open coded |
| 244 | */ |
| 245 | static inline uint32_t get4LE(const uint8_t* src) |
| 246 | { |
| 247 | return src[0] | (src[1] << 8) | (src[2] << 16) | (src[3] << 24); |
| 248 | } |
| 249 | |
| 250 | static int __write_to_log_daemon(log_id_t log_id, struct iovec *vec, size_t nr) |
| 251 | { |
| 252 | struct android_log_transport_write *node; |
| 253 | int ret; |
| 254 | struct timespec ts; |
| 255 | size_t len, i; |
| 256 | |
| 257 | for (len = i = 0; i < nr; ++i) { |
| 258 | len += vec[i].iov_len; |
| 259 | } |
| 260 | if (!len) { |
| 261 | return -EINVAL; |
| 262 | } |
| 263 | |
| 264 | #if defined(__BIONIC__) |
| 265 | if (log_id == LOG_ID_SECURITY) { |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 266 | if (vec[0].iov_len < 4) { |
| 267 | return -EINVAL; |
| 268 | } |
| 269 | |
Mark Salyzyn | ef5a14e | 2016-03-28 16:20:29 -0700 | [diff] [blame] | 270 | ret = check_log_uid_permissions(); |
| 271 | if (ret < 0) { |
| 272 | return ret; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 273 | } |
| 274 | if (!__android_log_security()) { |
| 275 | /* If only we could reset downstream logd counter */ |
| 276 | return -EPERM; |
| 277 | } |
| 278 | } else if (log_id == LOG_ID_EVENTS) { |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 279 | const char *tag; |
Mark Salyzyn | 0da1b47 | 2016-09-22 09:56:51 -0700 | [diff] [blame] | 280 | size_t len; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 281 | EventTagMap *m, *f; |
| 282 | |
| 283 | if (vec[0].iov_len < 4) { |
| 284 | return -EINVAL; |
| 285 | } |
| 286 | |
| 287 | tag = NULL; |
Mark Salyzyn | 0da1b47 | 2016-09-22 09:56:51 -0700 | [diff] [blame] | 288 | len = 0; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 289 | f = NULL; |
Mark Salyzyn | 0a9c0b9 | 2016-09-13 07:28:21 -0700 | [diff] [blame] | 290 | m = (EventTagMap *)atomic_load(&tagMap); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 291 | |
| 292 | if (!m) { |
| 293 | ret = __android_log_trylock(); |
Mark Salyzyn | 0a9c0b9 | 2016-09-13 07:28:21 -0700 | [diff] [blame] | 294 | m = (EventTagMap *)atomic_load(&tagMap); /* trylock flush cache */ |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 295 | if (!m) { |
| 296 | m = android_openEventTagMap(EVENT_TAG_MAP_FILE); |
| 297 | if (ret) { /* trylock failed, use local copy, mark for close */ |
| 298 | f = m; |
| 299 | } else { |
| 300 | if (!m) { /* One chance to open map file */ |
| 301 | m = (EventTagMap *)(uintptr_t)-1LL; |
| 302 | } |
Mark Salyzyn | 0a9c0b9 | 2016-09-13 07:28:21 -0700 | [diff] [blame] | 303 | atomic_store(&tagMap, (uintptr_t)m); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 304 | } |
| 305 | } |
| 306 | if (!ret) { /* trylock succeeded, unlock */ |
| 307 | __android_log_unlock(); |
| 308 | } |
| 309 | } |
| 310 | if (m && (m != (EventTagMap *)(uintptr_t)-1LL)) { |
Mark Salyzyn | 0da1b47 | 2016-09-22 09:56:51 -0700 | [diff] [blame] | 311 | tag = android_lookupEventTag_len(m, &len, get4LE(vec[0].iov_base)); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 312 | } |
Mark Salyzyn | 0da1b47 | 2016-09-22 09:56:51 -0700 | [diff] [blame] | 313 | ret = __android_log_is_loggable_len(ANDROID_LOG_INFO, |
| 314 | tag, len, |
| 315 | ANDROID_LOG_VERBOSE); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 316 | if (f) { /* local copy marked for close */ |
| 317 | android_closeEventTagMap(f); |
| 318 | } |
| 319 | if (!ret) { |
| 320 | return -EPERM; |
| 321 | } |
| 322 | } else { |
| 323 | /* Validate the incoming tag, tag content can not split across iovec */ |
| 324 | char prio = ANDROID_LOG_VERBOSE; |
| 325 | const char *tag = vec[0].iov_base; |
| 326 | size_t len = vec[0].iov_len; |
| 327 | if (!tag) { |
| 328 | len = 0; |
| 329 | } |
| 330 | if (len > 0) { |
| 331 | prio = *tag; |
| 332 | if (len > 1) { |
| 333 | --len; |
| 334 | ++tag; |
| 335 | } else { |
| 336 | len = vec[1].iov_len; |
| 337 | tag = ((const char *)vec[1].iov_base); |
| 338 | if (!tag) { |
| 339 | len = 0; |
| 340 | } |
| 341 | } |
| 342 | } |
| 343 | /* tag must be nul terminated */ |
| 344 | if (strnlen(tag, len) >= len) { |
| 345 | tag = NULL; |
| 346 | } |
| 347 | |
Mark Salyzyn | 0da1b47 | 2016-09-22 09:56:51 -0700 | [diff] [blame] | 348 | if (!__android_log_is_loggable_len(prio, |
| 349 | tag, len - 1, |
| 350 | ANDROID_LOG_VERBOSE)) { |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 351 | return -EPERM; |
| 352 | } |
| 353 | } |
| 354 | |
| 355 | clock_gettime(android_log_clockid(), &ts); |
| 356 | #else |
| 357 | /* simulate clock_gettime(CLOCK_REALTIME, &ts); */ |
| 358 | { |
| 359 | struct timeval tv; |
| 360 | gettimeofday(&tv, NULL); |
| 361 | ts.tv_sec = tv.tv_sec; |
| 362 | ts.tv_nsec = tv.tv_usec * 1000; |
| 363 | } |
| 364 | #endif |
| 365 | |
| 366 | ret = 0; |
Mark Salyzyn | ef5a14e | 2016-03-28 16:20:29 -0700 | [diff] [blame] | 367 | i = 1 << log_id; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 368 | write_transport_for_each(node, &__android_log_transport_write) { |
Mark Salyzyn | ef5a14e | 2016-03-28 16:20:29 -0700 | [diff] [blame] | 369 | if (node->logMask & i) { |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 370 | ssize_t retval; |
| 371 | retval = (*node->write)(log_id, &ts, vec, nr); |
| 372 | if (ret >= 0) { |
| 373 | ret = retval; |
| 374 | } |
| 375 | } |
| 376 | } |
| 377 | |
| 378 | write_transport_for_each(node, &__android_log_persist_write) { |
Mark Salyzyn | ef5a14e | 2016-03-28 16:20:29 -0700 | [diff] [blame] | 379 | if (node->logMask & i) { |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 380 | (void)(*node->write)(log_id, &ts, vec, nr); |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | return ret; |
| 385 | } |
| 386 | |
| 387 | static int __write_to_log_init(log_id_t log_id, struct iovec *vec, size_t nr) |
| 388 | { |
| 389 | __android_log_lock(); |
| 390 | |
| 391 | if (write_to_log == __write_to_log_init) { |
| 392 | int ret; |
| 393 | |
| 394 | ret = __write_to_log_initialize(); |
| 395 | if (ret < 0) { |
| 396 | __android_log_unlock(); |
| 397 | if (!list_empty(&__android_log_persist_write)) { |
| 398 | __write_to_log_daemon(log_id, vec, nr); |
| 399 | } |
| 400 | return ret; |
| 401 | } |
| 402 | |
| 403 | write_to_log = __write_to_log_daemon; |
| 404 | } |
| 405 | |
| 406 | __android_log_unlock(); |
| 407 | |
| 408 | return write_to_log(log_id, vec, nr); |
| 409 | } |
| 410 | |
| 411 | LIBLOG_ABI_PUBLIC int __android_log_write(int prio, const char *tag, |
| 412 | const char *msg) |
| 413 | { |
| 414 | return __android_log_buf_write(LOG_ID_MAIN, prio, tag, msg); |
| 415 | } |
| 416 | |
| 417 | LIBLOG_ABI_PUBLIC int __android_log_buf_write(int bufID, int prio, |
| 418 | const char *tag, const char *msg) |
| 419 | { |
| 420 | struct iovec vec[3]; |
| 421 | char tmp_tag[32]; |
| 422 | |
| 423 | if (!tag) |
| 424 | tag = ""; |
| 425 | |
| 426 | /* XXX: This needs to go! */ |
| 427 | if ((bufID != LOG_ID_RADIO) && |
| 428 | (!strcmp(tag, "HTC_RIL") || |
| 429 | !strncmp(tag, "RIL", 3) || /* Any log tag with "RIL" as the prefix */ |
| 430 | !strncmp(tag, "IMS", 3) || /* Any log tag with "IMS" as the prefix */ |
| 431 | !strcmp(tag, "AT") || |
| 432 | !strcmp(tag, "GSM") || |
| 433 | !strcmp(tag, "STK") || |
| 434 | !strcmp(tag, "CDMA") || |
| 435 | !strcmp(tag, "PHONE") || |
| 436 | !strcmp(tag, "SMS"))) { |
| 437 | bufID = LOG_ID_RADIO; |
| 438 | /* Inform third party apps/ril/radio.. to use Rlog or RLOG */ |
| 439 | snprintf(tmp_tag, sizeof(tmp_tag), "use-Rlog/RLOG-%s", tag); |
| 440 | tag = tmp_tag; |
| 441 | } |
| 442 | |
| 443 | #if __BIONIC__ |
| 444 | if (prio == ANDROID_LOG_FATAL) { |
| 445 | android_set_abort_message(msg); |
| 446 | } |
| 447 | #endif |
| 448 | |
Mark Salyzyn | ef5a14e | 2016-03-28 16:20:29 -0700 | [diff] [blame] | 449 | vec[0].iov_base = (unsigned char *)&prio; |
| 450 | vec[0].iov_len = 1; |
| 451 | vec[1].iov_base = (void *)tag; |
| 452 | vec[1].iov_len = strlen(tag) + 1; |
| 453 | vec[2].iov_base = (void *)msg; |
| 454 | vec[2].iov_len = strlen(msg) + 1; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 455 | |
| 456 | return write_to_log(bufID, vec, 3); |
| 457 | } |
| 458 | |
| 459 | LIBLOG_ABI_PUBLIC int __android_log_vprint(int prio, const char *tag, |
| 460 | const char *fmt, va_list ap) |
| 461 | { |
| 462 | char buf[LOG_BUF_SIZE]; |
| 463 | |
| 464 | vsnprintf(buf, LOG_BUF_SIZE, fmt, ap); |
| 465 | |
| 466 | return __android_log_write(prio, tag, buf); |
| 467 | } |
| 468 | |
| 469 | LIBLOG_ABI_PUBLIC int __android_log_print(int prio, const char *tag, |
| 470 | const char *fmt, ...) |
| 471 | { |
| 472 | va_list ap; |
| 473 | char buf[LOG_BUF_SIZE]; |
| 474 | |
| 475 | va_start(ap, fmt); |
| 476 | vsnprintf(buf, LOG_BUF_SIZE, fmt, ap); |
| 477 | va_end(ap); |
| 478 | |
| 479 | return __android_log_write(prio, tag, buf); |
| 480 | } |
| 481 | |
| 482 | LIBLOG_ABI_PUBLIC int __android_log_buf_print(int bufID, int prio, |
| 483 | const char *tag, |
| 484 | const char *fmt, ...) |
| 485 | { |
| 486 | va_list ap; |
| 487 | char buf[LOG_BUF_SIZE]; |
| 488 | |
| 489 | va_start(ap, fmt); |
| 490 | vsnprintf(buf, LOG_BUF_SIZE, fmt, ap); |
| 491 | va_end(ap); |
| 492 | |
| 493 | return __android_log_buf_write(bufID, prio, tag, buf); |
| 494 | } |
| 495 | |
| 496 | LIBLOG_ABI_PUBLIC void __android_log_assert(const char *cond, const char *tag, |
| 497 | const char *fmt, ...) |
| 498 | { |
| 499 | char buf[LOG_BUF_SIZE]; |
| 500 | |
| 501 | if (fmt) { |
| 502 | va_list ap; |
| 503 | va_start(ap, fmt); |
| 504 | vsnprintf(buf, LOG_BUF_SIZE, fmt, ap); |
| 505 | va_end(ap); |
| 506 | } else { |
| 507 | /* Msg not provided, log condition. N.B. Do not use cond directly as |
| 508 | * format string as it could contain spurious '%' syntax (e.g. |
| 509 | * "%d" in "blocks%devs == 0"). |
| 510 | */ |
| 511 | if (cond) |
| 512 | snprintf(buf, LOG_BUF_SIZE, "Assertion failed: %s", cond); |
| 513 | else |
| 514 | strcpy(buf, "Unspecified assertion failed"); |
| 515 | } |
| 516 | |
| 517 | __android_log_write(ANDROID_LOG_FATAL, tag, buf); |
| 518 | abort(); /* abort so we have a chance to debug the situation */ |
| 519 | /* NOTREACHED */ |
| 520 | } |
| 521 | |
| 522 | LIBLOG_ABI_PUBLIC int __android_log_bwrite(int32_t tag, |
| 523 | const void *payload, size_t len) |
| 524 | { |
| 525 | struct iovec vec[2]; |
| 526 | |
| 527 | vec[0].iov_base = &tag; |
| 528 | vec[0].iov_len = sizeof(tag); |
| 529 | vec[1].iov_base = (void*)payload; |
| 530 | vec[1].iov_len = len; |
| 531 | |
| 532 | return write_to_log(LOG_ID_EVENTS, vec, 2); |
| 533 | } |
| 534 | |
| 535 | LIBLOG_ABI_PUBLIC int __android_log_security_bwrite(int32_t tag, |
| 536 | const void *payload, |
| 537 | size_t len) |
| 538 | { |
| 539 | struct iovec vec[2]; |
| 540 | |
| 541 | vec[0].iov_base = &tag; |
| 542 | vec[0].iov_len = sizeof(tag); |
| 543 | vec[1].iov_base = (void*)payload; |
| 544 | vec[1].iov_len = len; |
| 545 | |
| 546 | return write_to_log(LOG_ID_SECURITY, vec, 2); |
| 547 | } |
| 548 | |
| 549 | /* |
| 550 | * Like __android_log_bwrite, but takes the type as well. Doesn't work |
| 551 | * for the general case where we're generating lists of stuff, but very |
| 552 | * handy if we just want to dump an integer into the log. |
| 553 | */ |
| 554 | LIBLOG_ABI_PUBLIC int __android_log_btwrite(int32_t tag, char type, |
| 555 | const void *payload, size_t len) |
| 556 | { |
| 557 | struct iovec vec[3]; |
| 558 | |
| 559 | vec[0].iov_base = &tag; |
| 560 | vec[0].iov_len = sizeof(tag); |
| 561 | vec[1].iov_base = &type; |
| 562 | vec[1].iov_len = sizeof(type); |
| 563 | vec[2].iov_base = (void*)payload; |
| 564 | vec[2].iov_len = len; |
| 565 | |
| 566 | return write_to_log(LOG_ID_EVENTS, vec, 3); |
| 567 | } |
| 568 | |
| 569 | /* |
| 570 | * Like __android_log_bwrite, but used for writing strings to the |
| 571 | * event log. |
| 572 | */ |
| 573 | LIBLOG_ABI_PUBLIC int __android_log_bswrite(int32_t tag, const char *payload) |
| 574 | { |
| 575 | struct iovec vec[4]; |
| 576 | char type = EVENT_TYPE_STRING; |
| 577 | uint32_t len = strlen(payload); |
| 578 | |
| 579 | vec[0].iov_base = &tag; |
| 580 | vec[0].iov_len = sizeof(tag); |
| 581 | vec[1].iov_base = &type; |
| 582 | vec[1].iov_len = sizeof(type); |
| 583 | vec[2].iov_base = &len; |
| 584 | vec[2].iov_len = sizeof(len); |
| 585 | vec[3].iov_base = (void*)payload; |
| 586 | vec[3].iov_len = len; |
| 587 | |
| 588 | return write_to_log(LOG_ID_EVENTS, vec, 4); |
| 589 | } |
| 590 | |
| 591 | /* |
| 592 | * Like __android_log_security_bwrite, but used for writing strings to the |
| 593 | * security log. |
| 594 | */ |
| 595 | LIBLOG_ABI_PUBLIC int __android_log_security_bswrite(int32_t tag, |
| 596 | const char *payload) |
| 597 | { |
| 598 | struct iovec vec[4]; |
| 599 | char type = EVENT_TYPE_STRING; |
| 600 | uint32_t len = strlen(payload); |
| 601 | |
| 602 | vec[0].iov_base = &tag; |
| 603 | vec[0].iov_len = sizeof(tag); |
| 604 | vec[1].iov_base = &type; |
| 605 | vec[1].iov_len = sizeof(type); |
| 606 | vec[2].iov_base = &len; |
| 607 | vec[2].iov_len = sizeof(len); |
| 608 | vec[3].iov_base = (void*)payload; |
| 609 | vec[3].iov_len = len; |
| 610 | |
| 611 | return write_to_log(LOG_ID_SECURITY, vec, 4); |
| 612 | } |