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 | 11fc1e7 | 2017-03-09 07:28:29 -0800 | [diff] [blame] | 28 | #include <log/log_transport.h> |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 29 | #include <private/android_filesystem_config.h> |
| 30 | #include <private/android_logger.h> |
| 31 | |
Mark Salyzyn | 7c713a9 | 2016-03-08 16:18:26 -0800 | [diff] [blame] | 32 | #include "config_read.h" /* __android_log_config_read_close() definition */ |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 33 | #include "config_write.h" |
| 34 | #include "log_portability.h" |
| 35 | #include "logger.h" |
| 36 | |
| 37 | #define LOG_BUF_SIZE 1024 |
| 38 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 39 | static int __write_to_log_init(log_id_t, struct iovec* vec, size_t nr); |
| 40 | static int (*write_to_log)(log_id_t, struct iovec* vec, |
| 41 | size_t nr) = __write_to_log_init; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 42 | |
| 43 | /* |
| 44 | * This is used by the C++ code to decide if it should write logs through |
| 45 | * the C code. Basically, if /dev/socket/logd is available, we're running in |
| 46 | * the simulator rather than a desktop tool and want to use the device. |
| 47 | */ |
| 48 | static enum { |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 49 | kLogUninitialized, |
| 50 | kLogNotAvailable, |
| 51 | kLogAvailable |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 52 | } g_log_status = kLogUninitialized; |
| 53 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 54 | static int check_log_uid_permissions() { |
Dan Willemsen | 7b8edc6 | 2016-11-29 13:39:55 -0800 | [diff] [blame] | 55 | #if defined(__ANDROID__) |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 56 | uid_t uid = __android_log_uid(); |
Mark Salyzyn | ef5a14e | 2016-03-28 16:20:29 -0700 | [diff] [blame] | 57 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 58 | /* Matches clientHasLogCredentials() in logd */ |
| 59 | if ((uid != AID_SYSTEM) && (uid != AID_ROOT) && (uid != AID_LOG)) { |
| 60 | uid = geteuid(); |
Mark Salyzyn | ef5a14e | 2016-03-28 16:20:29 -0700 | [diff] [blame] | 61 | if ((uid != AID_SYSTEM) && (uid != AID_ROOT) && (uid != AID_LOG)) { |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 62 | gid_t gid = getgid(); |
| 63 | if ((gid != AID_SYSTEM) && (gid != AID_ROOT) && (gid != AID_LOG)) { |
| 64 | gid = getegid(); |
| 65 | if ((gid != AID_SYSTEM) && (gid != AID_ROOT) && (gid != AID_LOG)) { |
| 66 | int num_groups; |
| 67 | gid_t* groups; |
Mark Salyzyn | ef5a14e | 2016-03-28 16:20:29 -0700 | [diff] [blame] | 68 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 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; |
Mark Salyzyn | ef5a14e | 2016-03-28 16:20:29 -0700 | [diff] [blame] | 81 | } |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 82 | --num_groups; |
| 83 | } |
| 84 | free(groups); |
| 85 | if (num_groups <= 0) { |
| 86 | return -EPERM; |
| 87 | } |
Mark Salyzyn | ef5a14e | 2016-03-28 16:20:29 -0700 | [diff] [blame] | 88 | } |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 89 | } |
Mark Salyzyn | ef5a14e | 2016-03-28 16:20:29 -0700 | [diff] [blame] | 90 | } |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 91 | } |
Mark Salyzyn | ef5a14e | 2016-03-28 16:20:29 -0700 | [diff] [blame] | 92 | #endif |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 93 | return 0; |
Mark Salyzyn | ef5a14e | 2016-03-28 16:20:29 -0700 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | static void __android_log_cache_available( |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 97 | struct android_log_transport_write* node) { |
| 98 | size_t i; |
Mark Salyzyn | ef5a14e | 2016-03-28 16:20:29 -0700 | [diff] [blame] | 99 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 100 | if (node->logMask) { |
| 101 | return; |
| 102 | } |
Mark Salyzyn | ef5a14e | 2016-03-28 16:20:29 -0700 | [diff] [blame] | 103 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 104 | for (i = LOG_ID_MIN; i < LOG_ID_MAX; ++i) { |
| 105 | if (node->write && (i != LOG_ID_KERNEL) && |
| 106 | ((i != LOG_ID_SECURITY) || (check_log_uid_permissions() == 0)) && |
| 107 | (!node->available || ((*node->available)(i) >= 0))) { |
| 108 | node->logMask |= 1 << i; |
Mark Salyzyn | ef5a14e | 2016-03-28 16:20:29 -0700 | [diff] [blame] | 109 | } |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 110 | } |
Mark Salyzyn | ef5a14e | 2016-03-28 16:20:29 -0700 | [diff] [blame] | 111 | } |
| 112 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 113 | LIBLOG_ABI_PUBLIC int __android_log_dev_available() { |
| 114 | struct android_log_transport_write* node; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 115 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 116 | if (list_empty(&__android_log_transport_write)) { |
| 117 | return kLogUninitialized; |
| 118 | } |
Mark Salyzyn | ef5a14e | 2016-03-28 16:20:29 -0700 | [diff] [blame] | 119 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 120 | write_transport_for_each(node, &__android_log_transport_write) { |
| 121 | __android_log_cache_available(node); |
| 122 | if (node->logMask) { |
| 123 | return kLogAvailable; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 124 | } |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 125 | } |
| 126 | return kLogNotAvailable; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 127 | } |
Mark Salyzyn | 0a9c0b9 | 2016-09-13 07:28:21 -0700 | [diff] [blame] | 128 | |
Dan Willemsen | 7b8edc6 | 2016-11-29 13:39:55 -0800 | [diff] [blame] | 129 | #if defined(__ANDROID__) |
Mark Salyzyn | 0a9c0b9 | 2016-09-13 07:28:21 -0700 | [diff] [blame] | 130 | static atomic_uintptr_t tagMap; |
| 131 | #endif |
| 132 | |
Mark Salyzyn | 67dc748 | 2016-08-23 10:23:36 -0700 | [diff] [blame] | 133 | /* |
| 134 | * Release any logger resources. A new log write will immediately re-acquire. |
| 135 | */ |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 136 | LIBLOG_ABI_PUBLIC void __android_log_close() { |
| 137 | struct android_log_transport_write* transport; |
Dan Willemsen | 7b8edc6 | 2016-11-29 13:39:55 -0800 | [diff] [blame] | 138 | #if defined(__ANDROID__) |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 139 | EventTagMap* m; |
Mark Salyzyn | 0a9c0b9 | 2016-09-13 07:28:21 -0700 | [diff] [blame] | 140 | #endif |
Mark Salyzyn | 67dc748 | 2016-08-23 10:23:36 -0700 | [diff] [blame] | 141 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 142 | __android_log_lock(); |
Mark Salyzyn | 67dc748 | 2016-08-23 10:23:36 -0700 | [diff] [blame] | 143 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 144 | write_to_log = __write_to_log_init; |
Mark Salyzyn | 67dc748 | 2016-08-23 10:23:36 -0700 | [diff] [blame] | 145 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 146 | /* |
| 147 | * Threads that are actively writing at this point are not held back |
| 148 | * by a lock and are at risk of dropping the messages with a return code |
| 149 | * -EBADF. Prefer to return error code than add the overhead of a lock to |
| 150 | * each log writing call to guarantee delivery. In addition, anyone |
| 151 | * calling this is doing so to release the logging resources and shut down, |
| 152 | * for them to do so with outstanding log requests in other threads is a |
| 153 | * disengenuous use of this function. |
| 154 | */ |
Mark Salyzyn | 67dc748 | 2016-08-23 10:23:36 -0700 | [diff] [blame] | 155 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 156 | write_transport_for_each(transport, &__android_log_persist_write) { |
| 157 | if (transport->close) { |
| 158 | (*transport->close)(); |
Mark Salyzyn | 67dc748 | 2016-08-23 10:23:36 -0700 | [diff] [blame] | 159 | } |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 160 | } |
Mark Salyzyn | 67dc748 | 2016-08-23 10:23:36 -0700 | [diff] [blame] | 161 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 162 | write_transport_for_each(transport, &__android_log_transport_write) { |
| 163 | if (transport->close) { |
| 164 | (*transport->close)(); |
Mark Salyzyn | 67dc748 | 2016-08-23 10:23:36 -0700 | [diff] [blame] | 165 | } |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 166 | } |
Mark Salyzyn | 67dc748 | 2016-08-23 10:23:36 -0700 | [diff] [blame] | 167 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 168 | __android_log_config_write_close(); |
Mark Salyzyn | 7c713a9 | 2016-03-08 16:18:26 -0800 | [diff] [blame] | 169 | |
Dan Willemsen | 7b8edc6 | 2016-11-29 13:39:55 -0800 | [diff] [blame] | 170 | #if defined(__ANDROID__) |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 171 | /* |
| 172 | * Additional risk here somewhat mitigated by immediately unlock flushing |
| 173 | * the processor cache. The multi-threaded race that we choose to accept, |
| 174 | * to minimize locking, is an atomic_load in a writer picking up a value |
| 175 | * just prior to entering this routine. There will be an use after free. |
| 176 | * |
| 177 | * Again, anyone calling this is doing so to release the logging resources |
| 178 | * is most probably going to quiesce then shut down; or to restart after |
| 179 | * a fork so the risk should be non-existent. For this reason we |
| 180 | * choose a mitigation stance for efficiency instead of incuring the cost |
| 181 | * of a lock for every log write. |
| 182 | */ |
| 183 | m = (EventTagMap*)atomic_exchange(&tagMap, (uintptr_t)0); |
Mark Salyzyn | 0a9c0b9 | 2016-09-13 07:28:21 -0700 | [diff] [blame] | 184 | #endif |
| 185 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 186 | __android_log_unlock(); |
Mark Salyzyn | 0a9c0b9 | 2016-09-13 07:28:21 -0700 | [diff] [blame] | 187 | |
Dan Willemsen | 7b8edc6 | 2016-11-29 13:39:55 -0800 | [diff] [blame] | 188 | #if defined(__ANDROID__) |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 189 | if (m != (EventTagMap*)(uintptr_t)-1LL) android_closeEventTagMap(m); |
Mark Salyzyn | 0a9c0b9 | 2016-09-13 07:28:21 -0700 | [diff] [blame] | 190 | #endif |
Mark Salyzyn | 67dc748 | 2016-08-23 10:23:36 -0700 | [diff] [blame] | 191 | } |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 192 | |
| 193 | /* log_init_lock assumed */ |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 194 | static int __write_to_log_initialize() { |
| 195 | struct android_log_transport_write* transport; |
| 196 | struct listnode* n; |
| 197 | int i = 0, ret = 0; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 198 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 199 | __android_log_config_write(); |
| 200 | write_transport_for_each_safe(transport, n, &__android_log_transport_write) { |
| 201 | __android_log_cache_available(transport); |
| 202 | if (!transport->logMask) { |
| 203 | list_remove(&transport->node); |
| 204 | continue; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 205 | } |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 206 | if (!transport->open || ((*transport->open)() < 0)) { |
| 207 | if (transport->close) { |
| 208 | (*transport->close)(); |
| 209 | } |
| 210 | list_remove(&transport->node); |
| 211 | continue; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 212 | } |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 213 | ++ret; |
| 214 | } |
| 215 | write_transport_for_each_safe(transport, n, &__android_log_persist_write) { |
| 216 | __android_log_cache_available(transport); |
| 217 | if (!transport->logMask) { |
| 218 | list_remove(&transport->node); |
| 219 | continue; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 220 | } |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 221 | if (!transport->open || ((*transport->open)() < 0)) { |
| 222 | if (transport->close) { |
| 223 | (*transport->close)(); |
| 224 | } |
| 225 | list_remove(&transport->node); |
| 226 | continue; |
| 227 | } |
| 228 | ++i; |
| 229 | } |
| 230 | if (!ret && !i) { |
| 231 | return -ENODEV; |
| 232 | } |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 233 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 234 | return ret; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 235 | } |
| 236 | |
| 237 | /* |
| 238 | * Extract a 4-byte value from a byte stream. le32toh open coded |
| 239 | */ |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 240 | static inline uint32_t get4LE(const uint8_t* src) { |
| 241 | return src[0] | (src[1] << 8) | (src[2] << 16) | (src[3] << 24); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 242 | } |
| 243 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 244 | static int __write_to_log_daemon(log_id_t log_id, struct iovec* vec, size_t nr) { |
| 245 | struct android_log_transport_write* node; |
| 246 | int ret; |
| 247 | struct timespec ts; |
| 248 | size_t len, i; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 249 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 250 | for (len = i = 0; i < nr; ++i) { |
| 251 | len += vec[i].iov_len; |
| 252 | } |
| 253 | if (!len) { |
| 254 | return -EINVAL; |
| 255 | } |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 256 | |
Dan Willemsen | 7b8edc6 | 2016-11-29 13:39:55 -0800 | [diff] [blame] | 257 | #if defined(__ANDROID__) |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 258 | clock_gettime(android_log_clockid(), &ts); |
Mark Salyzyn | 035e87d | 2016-12-28 10:30:57 -0800 | [diff] [blame] | 259 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 260 | if (log_id == LOG_ID_SECURITY) { |
| 261 | if (vec[0].iov_len < 4) { |
| 262 | return -EINVAL; |
| 263 | } |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 264 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 265 | ret = check_log_uid_permissions(); |
| 266 | if (ret < 0) { |
| 267 | return ret; |
| 268 | } |
| 269 | if (!__android_log_security()) { |
| 270 | /* If only we could reset downstream logd counter */ |
| 271 | return -EPERM; |
| 272 | } |
| 273 | } else if (log_id == LOG_ID_EVENTS) { |
| 274 | const char* tag; |
| 275 | size_t len; |
| 276 | EventTagMap *m, *f; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 277 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 278 | if (vec[0].iov_len < 4) { |
| 279 | return -EINVAL; |
| 280 | } |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 281 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 282 | tag = NULL; |
| 283 | len = 0; |
| 284 | f = NULL; |
| 285 | m = (EventTagMap*)atomic_load(&tagMap); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 286 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 287 | if (!m) { |
| 288 | ret = __android_log_trylock(); |
| 289 | m = (EventTagMap*)atomic_load(&tagMap); /* trylock flush cache */ |
| 290 | if (!m) { |
| 291 | m = android_openEventTagMap(NULL); |
| 292 | if (ret) { /* trylock failed, use local copy, mark for close */ |
| 293 | f = m; |
| 294 | } else { |
| 295 | if (!m) { /* One chance to open map file */ |
| 296 | m = (EventTagMap*)(uintptr_t)-1LL; |
| 297 | } |
| 298 | atomic_store(&tagMap, (uintptr_t)m); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 299 | } |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 300 | } |
| 301 | if (!ret) { /* trylock succeeded, unlock */ |
| 302 | __android_log_unlock(); |
| 303 | } |
| 304 | } |
| 305 | if (m && (m != (EventTagMap*)(uintptr_t)-1LL)) { |
| 306 | tag = android_lookupEventTag_len(m, &len, get4LE(vec[0].iov_base)); |
| 307 | } |
| 308 | ret = __android_log_is_loggable_len(ANDROID_LOG_INFO, tag, len, |
| 309 | ANDROID_LOG_VERBOSE); |
| 310 | if (f) { /* local copy marked for close */ |
| 311 | android_closeEventTagMap(f); |
| 312 | } |
| 313 | if (!ret) { |
| 314 | return -EPERM; |
| 315 | } |
| 316 | } else { |
| 317 | /* Validate the incoming tag, tag content can not split across iovec */ |
| 318 | char prio = ANDROID_LOG_VERBOSE; |
| 319 | const char* tag = vec[0].iov_base; |
| 320 | size_t len = vec[0].iov_len; |
| 321 | if (!tag) { |
| 322 | len = 0; |
| 323 | } |
| 324 | if (len > 0) { |
| 325 | prio = *tag; |
| 326 | if (len > 1) { |
| 327 | --len; |
| 328 | ++tag; |
| 329 | } else { |
| 330 | len = vec[1].iov_len; |
| 331 | tag = ((const char*)vec[1].iov_base); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 332 | if (!tag) { |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 333 | len = 0; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 334 | } |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 335 | } |
| 336 | } |
| 337 | /* tag must be nul terminated */ |
| 338 | if (tag && strnlen(tag, len) >= len) { |
| 339 | tag = NULL; |
| 340 | } |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 341 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 342 | if (!__android_log_is_loggable_len(prio, tag, len - 1, ANDROID_LOG_VERBOSE)) { |
| 343 | return -EPERM; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 344 | } |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 345 | } |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 346 | #else |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 347 | /* simulate clock_gettime(CLOCK_REALTIME, &ts); */ |
| 348 | { |
| 349 | struct timeval tv; |
| 350 | gettimeofday(&tv, NULL); |
| 351 | ts.tv_sec = tv.tv_sec; |
| 352 | ts.tv_nsec = tv.tv_usec * 1000; |
| 353 | } |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 354 | #endif |
| 355 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 356 | ret = 0; |
| 357 | i = 1 << log_id; |
| 358 | write_transport_for_each(node, &__android_log_transport_write) { |
| 359 | if (node->logMask & i) { |
| 360 | ssize_t retval; |
| 361 | retval = (*node->write)(log_id, &ts, vec, nr); |
| 362 | if (ret >= 0) { |
| 363 | ret = retval; |
| 364 | } |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 365 | } |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 366 | } |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 367 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 368 | write_transport_for_each(node, &__android_log_persist_write) { |
| 369 | if (node->logMask & i) { |
| 370 | (void)(*node->write)(log_id, &ts, vec, nr); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 371 | } |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 372 | } |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 373 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 374 | return ret; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 375 | } |
| 376 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 377 | static int __write_to_log_init(log_id_t log_id, struct iovec* vec, size_t nr) { |
| 378 | __android_log_lock(); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 379 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 380 | if (write_to_log == __write_to_log_init) { |
| 381 | int ret; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 382 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 383 | ret = __write_to_log_initialize(); |
| 384 | if (ret < 0) { |
| 385 | __android_log_unlock(); |
| 386 | if (!list_empty(&__android_log_persist_write)) { |
| 387 | __write_to_log_daemon(log_id, vec, nr); |
| 388 | } |
| 389 | return ret; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 390 | } |
| 391 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 392 | write_to_log = __write_to_log_daemon; |
| 393 | } |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 394 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 395 | __android_log_unlock(); |
| 396 | |
| 397 | return write_to_log(log_id, vec, nr); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 398 | } |
| 399 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 400 | LIBLOG_ABI_PUBLIC int __android_log_write(int prio, const char* tag, |
| 401 | const char* msg) { |
| 402 | return __android_log_buf_write(LOG_ID_MAIN, prio, tag, msg); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 403 | } |
| 404 | |
| 405 | LIBLOG_ABI_PUBLIC int __android_log_buf_write(int bufID, int prio, |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 406 | const char* tag, const char* msg) { |
| 407 | struct iovec vec[3]; |
| 408 | char tmp_tag[32]; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 409 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 410 | if (!tag) tag = ""; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 411 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 412 | /* XXX: This needs to go! */ |
Mark Salyzyn | 2eca42b | 2017-03-28 09:49:53 -0700 | [diff] [blame] | 413 | if (bufID != LOG_ID_RADIO) { |
| 414 | switch (tag[0]) { |
| 415 | case 'H': |
| 416 | if (strcmp(tag + 1, "HTC_RIL" + 1)) break; |
| 417 | goto inform; |
| 418 | case 'R': |
| 419 | /* Any log tag with "RIL" as the prefix */ |
| 420 | if (strncmp(tag + 1, "RIL" + 1, strlen("RIL") - 1)) break; |
| 421 | goto inform; |
| 422 | case 'Q': |
| 423 | /* Any log tag with "QC_RIL" as the prefix */ |
| 424 | if (strncmp(tag + 1, "QC_RIL" + 1, strlen("QC_RIL") - 1)) break; |
| 425 | goto inform; |
| 426 | case 'I': |
| 427 | /* Any log tag with "IMS" as the prefix */ |
| 428 | if (strncmp(tag + 1, "IMS" + 1, strlen("IMS") - 1)) break; |
| 429 | goto inform; |
| 430 | case 'A': |
| 431 | if (strcmp(tag + 1, "AT" + 1)) break; |
| 432 | goto inform; |
| 433 | case 'G': |
| 434 | if (strcmp(tag + 1, "GSM" + 1)) break; |
| 435 | goto inform; |
| 436 | case 'S': |
| 437 | if (strcmp(tag + 1, "STK" + 1) && strcmp(tag + 1, "SMS" + 1)) break; |
| 438 | goto inform; |
| 439 | case 'C': |
| 440 | if (strcmp(tag + 1, "CDMA" + 1)) break; |
| 441 | goto inform; |
| 442 | case 'P': |
| 443 | if (strcmp(tag + 1, "PHONE" + 1)) break; |
| 444 | /* FALLTHRU */ |
| 445 | inform: |
| 446 | bufID = LOG_ID_RADIO; |
| 447 | snprintf(tmp_tag, sizeof(tmp_tag), "use-Rlog/RLOG-%s", tag); |
| 448 | tag = tmp_tag; |
| 449 | /* FALLTHRU */ |
| 450 | default: |
| 451 | break; |
| 452 | } |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 453 | } |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 454 | |
| 455 | #if __BIONIC__ |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 456 | if (prio == ANDROID_LOG_FATAL) { |
| 457 | android_set_abort_message(msg); |
| 458 | } |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 459 | #endif |
| 460 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 461 | vec[0].iov_base = (unsigned char*)&prio; |
| 462 | vec[0].iov_len = 1; |
| 463 | vec[1].iov_base = (void*)tag; |
| 464 | vec[1].iov_len = strlen(tag) + 1; |
| 465 | vec[2].iov_base = (void*)msg; |
| 466 | vec[2].iov_len = strlen(msg) + 1; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 467 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 468 | return write_to_log(bufID, vec, 3); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 469 | } |
| 470 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 471 | LIBLOG_ABI_PUBLIC int __android_log_vprint(int prio, const char* tag, |
| 472 | const char* fmt, va_list ap) { |
| 473 | char buf[LOG_BUF_SIZE]; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 474 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 475 | vsnprintf(buf, LOG_BUF_SIZE, fmt, ap); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 476 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 477 | return __android_log_write(prio, tag, buf); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 478 | } |
| 479 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 480 | LIBLOG_ABI_PUBLIC int __android_log_print(int prio, const char* tag, |
| 481 | const char* fmt, ...) { |
| 482 | va_list ap; |
| 483 | char buf[LOG_BUF_SIZE]; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 484 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 485 | va_start(ap, fmt); |
| 486 | vsnprintf(buf, LOG_BUF_SIZE, fmt, ap); |
| 487 | va_end(ap); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 488 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 489 | return __android_log_write(prio, tag, buf); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 490 | } |
| 491 | |
| 492 | LIBLOG_ABI_PUBLIC int __android_log_buf_print(int bufID, int prio, |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 493 | const char* tag, const char* fmt, |
| 494 | ...) { |
| 495 | va_list ap; |
| 496 | char buf[LOG_BUF_SIZE]; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 497 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 498 | va_start(ap, fmt); |
| 499 | vsnprintf(buf, LOG_BUF_SIZE, fmt, ap); |
| 500 | va_end(ap); |
| 501 | |
| 502 | return __android_log_buf_write(bufID, prio, tag, buf); |
| 503 | } |
| 504 | |
| 505 | LIBLOG_ABI_PUBLIC void __android_log_assert(const char* cond, const char* tag, |
| 506 | const char* fmt, ...) { |
| 507 | char buf[LOG_BUF_SIZE]; |
| 508 | |
| 509 | if (fmt) { |
| 510 | va_list ap; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 511 | va_start(ap, fmt); |
| 512 | vsnprintf(buf, LOG_BUF_SIZE, fmt, ap); |
| 513 | va_end(ap); |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 514 | } else { |
| 515 | /* Msg not provided, log condition. N.B. Do not use cond directly as |
| 516 | * format string as it could contain spurious '%' syntax (e.g. |
| 517 | * "%d" in "blocks%devs == 0"). |
| 518 | */ |
| 519 | if (cond) |
| 520 | snprintf(buf, LOG_BUF_SIZE, "Assertion failed: %s", cond); |
| 521 | else |
| 522 | strcpy(buf, "Unspecified assertion failed"); |
| 523 | } |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 524 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 525 | // Log assertion failures to stderr for the benefit of "adb shell" users |
| 526 | // and gtests (http://b/23675822). |
| 527 | struct iovec iov[2] = { |
| 528 | { buf, strlen(buf) }, { (char*)"\n", 1 }, |
| 529 | }; |
| 530 | TEMP_FAILURE_RETRY(writev(2, iov, 2)); |
| 531 | |
| 532 | __android_log_write(ANDROID_LOG_FATAL, tag, buf); |
| 533 | abort(); /* abort so we have a chance to debug the situation */ |
| 534 | /* NOTREACHED */ |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 535 | } |
| 536 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 537 | LIBLOG_ABI_PUBLIC int __android_log_bwrite(int32_t tag, const void* payload, |
| 538 | size_t len) { |
| 539 | struct iovec vec[2]; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 540 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 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; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 545 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 546 | return write_to_log(LOG_ID_EVENTS, vec, 2); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 547 | } |
| 548 | |
| 549 | LIBLOG_ABI_PUBLIC int __android_log_security_bwrite(int32_t tag, |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 550 | const void* payload, |
| 551 | size_t len) { |
| 552 | struct iovec vec[2]; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 553 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 554 | vec[0].iov_base = &tag; |
| 555 | vec[0].iov_len = sizeof(tag); |
| 556 | vec[1].iov_base = (void*)payload; |
| 557 | vec[1].iov_len = len; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 558 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 559 | return write_to_log(LOG_ID_SECURITY, vec, 2); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 560 | } |
| 561 | |
| 562 | /* |
| 563 | * Like __android_log_bwrite, but takes the type as well. Doesn't work |
| 564 | * for the general case where we're generating lists of stuff, but very |
| 565 | * handy if we just want to dump an integer into the log. |
| 566 | */ |
| 567 | LIBLOG_ABI_PUBLIC int __android_log_btwrite(int32_t tag, char type, |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 568 | const void* payload, size_t len) { |
| 569 | struct iovec vec[3]; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 570 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 571 | vec[0].iov_base = &tag; |
| 572 | vec[0].iov_len = sizeof(tag); |
| 573 | vec[1].iov_base = &type; |
| 574 | vec[1].iov_len = sizeof(type); |
| 575 | vec[2].iov_base = (void*)payload; |
| 576 | vec[2].iov_len = len; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 577 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 578 | return write_to_log(LOG_ID_EVENTS, vec, 3); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 579 | } |
| 580 | |
| 581 | /* |
| 582 | * Like __android_log_bwrite, but used for writing strings to the |
| 583 | * event log. |
| 584 | */ |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 585 | LIBLOG_ABI_PUBLIC int __android_log_bswrite(int32_t tag, const char* payload) { |
| 586 | struct iovec vec[4]; |
| 587 | char type = EVENT_TYPE_STRING; |
| 588 | uint32_t len = strlen(payload); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 589 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 590 | vec[0].iov_base = &tag; |
| 591 | vec[0].iov_len = sizeof(tag); |
| 592 | vec[1].iov_base = &type; |
| 593 | vec[1].iov_len = sizeof(type); |
| 594 | vec[2].iov_base = &len; |
| 595 | vec[2].iov_len = sizeof(len); |
| 596 | vec[3].iov_base = (void*)payload; |
| 597 | vec[3].iov_len = len; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 598 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 599 | return write_to_log(LOG_ID_EVENTS, vec, 4); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 600 | } |
| 601 | |
| 602 | /* |
| 603 | * Like __android_log_security_bwrite, but used for writing strings to the |
| 604 | * security log. |
| 605 | */ |
| 606 | LIBLOG_ABI_PUBLIC int __android_log_security_bswrite(int32_t tag, |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 607 | const char* payload) { |
| 608 | struct iovec vec[4]; |
| 609 | char type = EVENT_TYPE_STRING; |
| 610 | uint32_t len = strlen(payload); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 611 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 612 | vec[0].iov_base = &tag; |
| 613 | vec[0].iov_len = sizeof(tag); |
| 614 | vec[1].iov_base = &type; |
| 615 | vec[1].iov_len = sizeof(type); |
| 616 | vec[2].iov_base = &len; |
| 617 | vec[2].iov_len = sizeof(len); |
| 618 | vec[3].iov_base = (void*)payload; |
| 619 | vec[3].iov_len = len; |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 620 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 621 | return write_to_log(LOG_ID_SECURITY, vec, 4); |
Mark Salyzyn | c5ae20f | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 622 | } |
Mark Salyzyn | b63d67d | 2015-02-04 12:39:57 -0800 | [diff] [blame] | 623 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 624 | static int __write_to_log_null(log_id_t log_id, struct iovec* vec, size_t nr) { |
| 625 | size_t len, i; |
Mark Salyzyn | b63d67d | 2015-02-04 12:39:57 -0800 | [diff] [blame] | 626 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 627 | if ((log_id < LOG_ID_MIN) || (log_id >= LOG_ID_MAX)) { |
| 628 | return -EINVAL; |
| 629 | } |
Mark Salyzyn | b63d67d | 2015-02-04 12:39:57 -0800 | [diff] [blame] | 630 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 631 | for (len = i = 0; i < nr; ++i) { |
| 632 | len += vec[i].iov_len; |
| 633 | } |
| 634 | if (!len) { |
| 635 | return -EINVAL; |
| 636 | } |
| 637 | return len; |
Mark Salyzyn | b63d67d | 2015-02-04 12:39:57 -0800 | [diff] [blame] | 638 | } |
| 639 | |
| 640 | /* Following functions need access to our internal write_to_log status */ |
| 641 | |
Mark Salyzyn | 11fc1e7 | 2017-03-09 07:28:29 -0800 | [diff] [blame] | 642 | LIBLOG_HIDDEN int __android_log_transport; |
Mark Salyzyn | 7c713a9 | 2016-03-08 16:18:26 -0800 | [diff] [blame] | 643 | |
Mark Salyzyn | 11fc1e7 | 2017-03-09 07:28:29 -0800 | [diff] [blame] | 644 | LIBLOG_ABI_PUBLIC int android_set_log_transport(int transport_flag) { |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 645 | int retval; |
Mark Salyzyn | 7c713a9 | 2016-03-08 16:18:26 -0800 | [diff] [blame] | 646 | |
Mark Salyzyn | 11fc1e7 | 2017-03-09 07:28:29 -0800 | [diff] [blame] | 647 | if (transport_flag < 0) { |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 648 | return -EINVAL; |
| 649 | } |
Mark Salyzyn | b63d67d | 2015-02-04 12:39:57 -0800 | [diff] [blame] | 650 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 651 | retval = LOGGER_NULL; |
Mark Salyzyn | 7c713a9 | 2016-03-08 16:18:26 -0800 | [diff] [blame] | 652 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 653 | __android_log_lock(); |
Mark Salyzyn | b63d67d | 2015-02-04 12:39:57 -0800 | [diff] [blame] | 654 | |
Mark Salyzyn | 11fc1e7 | 2017-03-09 07:28:29 -0800 | [diff] [blame] | 655 | if (transport_flag & LOGGER_NULL) { |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 656 | write_to_log = __write_to_log_null; |
Mark Salyzyn | 7c713a9 | 2016-03-08 16:18:26 -0800 | [diff] [blame] | 657 | |
Mark Salyzyn | b63d67d | 2015-02-04 12:39:57 -0800 | [diff] [blame] | 658 | __android_log_unlock(); |
| 659 | |
Mark Salyzyn | 7c713a9 | 2016-03-08 16:18:26 -0800 | [diff] [blame] | 660 | return retval; |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 661 | } |
| 662 | |
Mark Salyzyn | 11fc1e7 | 2017-03-09 07:28:29 -0800 | [diff] [blame] | 663 | __android_log_transport &= LOGGER_LOCAL | LOGGER_LOGD | LOGGER_STDERR; |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 664 | |
Mark Salyzyn | 11fc1e7 | 2017-03-09 07:28:29 -0800 | [diff] [blame] | 665 | transport_flag &= LOGGER_LOCAL | LOGGER_LOGD | LOGGER_STDERR; |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 666 | |
Mark Salyzyn | 11fc1e7 | 2017-03-09 07:28:29 -0800 | [diff] [blame] | 667 | if (__android_log_transport != transport_flag) { |
| 668 | __android_log_transport = transport_flag; |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 669 | __android_log_config_write_close(); |
| 670 | __android_log_config_read_close(); |
| 671 | |
| 672 | write_to_log = __write_to_log_init; |
| 673 | /* generically we only expect these two values for write_to_log */ |
| 674 | } else if ((write_to_log != __write_to_log_init) && |
| 675 | (write_to_log != __write_to_log_daemon)) { |
| 676 | write_to_log = __write_to_log_init; |
| 677 | } |
| 678 | |
Mark Salyzyn | 11fc1e7 | 2017-03-09 07:28:29 -0800 | [diff] [blame] | 679 | retval = __android_log_transport; |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 680 | |
| 681 | __android_log_unlock(); |
| 682 | |
| 683 | return retval; |
Mark Salyzyn | b63d67d | 2015-02-04 12:39:57 -0800 | [diff] [blame] | 684 | } |
| 685 | |
Mark Salyzyn | 11fc1e7 | 2017-03-09 07:28:29 -0800 | [diff] [blame] | 686 | LIBLOG_ABI_PUBLIC int android_get_log_transport() { |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 687 | int ret = LOGGER_DEFAULT; |
Mark Salyzyn | b63d67d | 2015-02-04 12:39:57 -0800 | [diff] [blame] | 688 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 689 | __android_log_lock(); |
| 690 | if (write_to_log == __write_to_log_null) { |
| 691 | ret = LOGGER_NULL; |
| 692 | } else { |
Mark Salyzyn | 11fc1e7 | 2017-03-09 07:28:29 -0800 | [diff] [blame] | 693 | __android_log_transport &= LOGGER_LOCAL | LOGGER_LOGD | LOGGER_STDERR; |
| 694 | ret = __android_log_transport; |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 695 | if ((write_to_log != __write_to_log_init) && |
| 696 | (write_to_log != __write_to_log_daemon)) { |
| 697 | ret = -EINVAL; |
Mark Salyzyn | b63d67d | 2015-02-04 12:39:57 -0800 | [diff] [blame] | 698 | } |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 699 | } |
| 700 | __android_log_unlock(); |
Mark Salyzyn | b63d67d | 2015-02-04 12:39:57 -0800 | [diff] [blame] | 701 | |
Mark Salyzyn | a2d59f8 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 702 | return ret; |
Mark Salyzyn | b63d67d | 2015-02-04 12:39:57 -0800 | [diff] [blame] | 703 | } |