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 | fa3716b | 2014-02-14 16:05:05 -0800 | [diff] [blame] | 19 | #include <inttypes.h> |
Mark Salyzyn | 696817d | 2014-04-18 14:49:28 -0700 | [diff] [blame] | 20 | #include <poll.h> |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 21 | #include <signal.h> |
Mark Salyzyn | 6eef417 | 2014-12-15 09:51:39 -0800 | [diff] [blame] | 22 | #include <stdbool.h> |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 23 | #include <stddef.h> |
| 24 | #define NOMINMAX /* for windows to suppress definition of min in stdlib.h */ |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 25 | #include <stdlib.h> |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 26 | #include <string.h> |
Mark Salyzyn | a04464a | 2014-04-30 08:50:53 -0700 | [diff] [blame] | 27 | #include <sys/cdefs.h> |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 28 | #include <unistd.h> |
| 29 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 30 | #include <cutils/list.h> |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 31 | #include <cutils/sockets.h> |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 32 | #include <log/log.h> |
| 33 | #include <log/logger.h> |
Mark Salyzyn | 6eef417 | 2014-12-15 09:51:39 -0800 | [diff] [blame] | 34 | #include <private/android_filesystem_config.h> |
| 35 | #include <private/android_logger.h> |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 36 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 37 | /* branchless on many architectures. */ |
| 38 | #define min(x,y) ((y) ^ (((x) ^ (y)) & -((x) < (y)))) |
Mark Salyzyn | 1345f38 | 2014-01-14 08:41:27 -0800 | [diff] [blame] | 39 | |
Elliott Hughes | adbf442 | 2015-07-29 17:45:24 -0700 | [diff] [blame] | 40 | #if defined(_WIN32) |
Mark Salyzyn | 9568705 | 2014-10-02 11:12:28 -0700 | [diff] [blame] | 41 | #define WEAK static |
| 42 | #else |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 43 | #define WEAK __attribute__((weak)) |
Mark Salyzyn | 9568705 | 2014-10-02 11:12:28 -0700 | [diff] [blame] | 44 | #endif |
Mark Salyzyn | a04464a | 2014-04-30 08:50:53 -0700 | [diff] [blame] | 45 | #ifndef __unused |
| 46 | #define __unused __attribute__((unused)) |
| 47 | #endif |
Mark Salyzyn | 1345f38 | 2014-01-14 08:41:27 -0800 | [diff] [blame] | 48 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 49 | /* Private copy of ../libcutils/socket_local_client.c prevent library loops */ |
Mark Salyzyn | 1345f38 | 2014-01-14 08:41:27 -0800 | [diff] [blame] | 50 | |
Elliott Hughes | adbf442 | 2015-07-29 17:45:24 -0700 | [diff] [blame] | 51 | #if defined(_WIN32) |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 52 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 53 | int WEAK socket_local_client(const char *name, int namespaceId, int type) |
| 54 | { |
| 55 | errno = ENOSYS; |
| 56 | return -ENOSYS; |
| 57 | } |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 58 | |
Elliott Hughes | adbf442 | 2015-07-29 17:45:24 -0700 | [diff] [blame] | 59 | #else /* !_WIN32 */ |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 60 | |
| 61 | #include <sys/socket.h> |
| 62 | #include <sys/un.h> |
| 63 | #include <sys/select.h> |
| 64 | #include <sys/types.h> |
| 65 | |
| 66 | /* Private copy of ../libcutils/socket_local.h prevent library loops */ |
| 67 | #define FILESYSTEM_SOCKET_PREFIX "/tmp/" |
| 68 | #define ANDROID_RESERVED_SOCKET_PREFIX "/dev/socket/" |
| 69 | /* End of ../libcutils/socket_local.h */ |
| 70 | |
| 71 | #define LISTEN_BACKLOG 4 |
| 72 | |
| 73 | /* Documented in header file. */ |
| 74 | int WEAK socket_make_sockaddr_un(const char *name, int namespaceId, |
| 75 | struct sockaddr_un *p_addr, socklen_t *alen) |
| 76 | { |
| 77 | memset (p_addr, 0, sizeof (*p_addr)); |
| 78 | size_t namelen; |
| 79 | |
| 80 | switch (namespaceId) { |
| 81 | case ANDROID_SOCKET_NAMESPACE_ABSTRACT: |
Elliott Hughes | 9768d24 | 2014-11-21 22:50:20 -0800 | [diff] [blame] | 82 | #if defined(__linux__) |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 83 | namelen = strlen(name); |
| 84 | |
| 85 | /* Test with length +1 for the *initial* '\0'. */ |
| 86 | if ((namelen + 1) > sizeof(p_addr->sun_path)) { |
| 87 | goto error; |
| 88 | } |
| 89 | |
| 90 | /* |
| 91 | * Note: The path in this case is *not* supposed to be |
| 92 | * '\0'-terminated. ("man 7 unix" for the gory details.) |
| 93 | */ |
| 94 | |
| 95 | p_addr->sun_path[0] = 0; |
| 96 | memcpy(p_addr->sun_path + 1, name, namelen); |
Elliott Hughes | 9768d24 | 2014-11-21 22:50:20 -0800 | [diff] [blame] | 97 | #else |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 98 | /* this OS doesn't have the Linux abstract namespace */ |
| 99 | |
| 100 | namelen = strlen(name) + strlen(FILESYSTEM_SOCKET_PREFIX); |
| 101 | /* unix_path_max appears to be missing on linux */ |
| 102 | if (namelen > sizeof(*p_addr) |
| 103 | - offsetof(struct sockaddr_un, sun_path) - 1) { |
| 104 | goto error; |
| 105 | } |
| 106 | |
| 107 | strcpy(p_addr->sun_path, FILESYSTEM_SOCKET_PREFIX); |
| 108 | strcat(p_addr->sun_path, name); |
Elliott Hughes | 9768d24 | 2014-11-21 22:50:20 -0800 | [diff] [blame] | 109 | #endif |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 110 | break; |
| 111 | |
| 112 | case ANDROID_SOCKET_NAMESPACE_RESERVED: |
| 113 | namelen = strlen(name) + strlen(ANDROID_RESERVED_SOCKET_PREFIX); |
| 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, ANDROID_RESERVED_SOCKET_PREFIX); |
| 121 | strcat(p_addr->sun_path, name); |
| 122 | break; |
| 123 | |
| 124 | case ANDROID_SOCKET_NAMESPACE_FILESYSTEM: |
| 125 | namelen = strlen(name); |
| 126 | /* unix_path_max appears to be missing on linux */ |
| 127 | if (namelen > sizeof(*p_addr) |
| 128 | - offsetof(struct sockaddr_un, sun_path) - 1) { |
| 129 | goto error; |
| 130 | } |
| 131 | |
| 132 | strcpy(p_addr->sun_path, name); |
| 133 | break; |
| 134 | |
| 135 | default: |
| 136 | /* invalid namespace id */ |
| 137 | return -1; |
| 138 | } |
| 139 | |
| 140 | p_addr->sun_family = AF_LOCAL; |
| 141 | *alen = namelen + offsetof(struct sockaddr_un, sun_path) + 1; |
| 142 | return 0; |
| 143 | error: |
| 144 | return -1; |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * connect to peer named "name" on fd |
| 149 | * returns same fd or -1 on error. |
| 150 | * fd is not closed on error. that's your job. |
| 151 | * |
| 152 | * Used by AndroidSocketImpl |
| 153 | */ |
| 154 | int WEAK socket_local_client_connect(int fd, const char *name, int namespaceId, |
Mark Salyzyn | a04464a | 2014-04-30 08:50:53 -0700 | [diff] [blame] | 155 | int type __unused) |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 156 | { |
| 157 | struct sockaddr_un addr; |
| 158 | socklen_t alen; |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 159 | int err; |
| 160 | |
| 161 | err = socket_make_sockaddr_un(name, namespaceId, &addr, &alen); |
| 162 | |
| 163 | if (err < 0) { |
| 164 | goto error; |
| 165 | } |
| 166 | |
| 167 | if(connect(fd, (struct sockaddr *) &addr, alen) < 0) { |
| 168 | goto error; |
| 169 | } |
| 170 | |
| 171 | return fd; |
| 172 | |
| 173 | error: |
| 174 | return -1; |
| 175 | } |
| 176 | |
| 177 | /** |
| 178 | * connect to peer named "name" |
| 179 | * returns fd or -1 on error |
| 180 | */ |
| 181 | int WEAK socket_local_client(const char *name, int namespaceId, int type) |
| 182 | { |
| 183 | int s; |
| 184 | |
| 185 | s = socket(AF_LOCAL, type, 0); |
| 186 | if(s < 0) return -1; |
| 187 | |
| 188 | if ( 0 > socket_local_client_connect(s, name, namespaceId, type)) { |
| 189 | close(s); |
| 190 | return -1; |
| 191 | } |
| 192 | |
| 193 | return s; |
| 194 | } |
| 195 | |
Elliott Hughes | adbf442 | 2015-07-29 17:45:24 -0700 | [diff] [blame] | 196 | #endif /* !_WIN32 */ |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 197 | /* End of ../libcutils/socket_local_client.c */ |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 198 | |
| 199 | #define logger_for_each(logger, logger_list) \ |
| 200 | for (logger = node_to_item((logger_list)->node.next, struct logger, node); \ |
| 201 | logger != node_to_item(&(logger_list)->node, struct logger, node); \ |
| 202 | logger = node_to_item((logger)->node.next, struct logger, node)) |
| 203 | |
| 204 | /* In the future, we would like to make this list extensible */ |
| 205 | static const char *LOG_NAME[LOG_ID_MAX] = { |
| 206 | [LOG_ID_MAIN] = "main", |
| 207 | [LOG_ID_RADIO] = "radio", |
| 208 | [LOG_ID_EVENTS] = "events", |
Mark Salyzyn | 99f47a9 | 2014-04-07 14:58:08 -0700 | [diff] [blame] | 209 | [LOG_ID_SYSTEM] = "system", |
| 210 | [LOG_ID_CRASH] = "crash", |
Mark Salyzyn | 083b037 | 2015-12-04 10:59:45 -0800 | [diff] [blame] | 211 | [LOG_ID_SECURITY] = "security", |
Mark Salyzyn | 440e109 | 2014-10-10 15:13:15 -0700 | [diff] [blame] | 212 | [LOG_ID_KERNEL] = "kernel", |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 213 | }; |
| 214 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 215 | const char *android_log_id_to_name(log_id_t log_id) |
| 216 | { |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 217 | if (log_id >= LOG_ID_MAX) { |
| 218 | log_id = LOG_ID_MAIN; |
| 219 | } |
| 220 | return LOG_NAME[log_id]; |
| 221 | } |
| 222 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 223 | log_id_t android_name_to_log_id(const char *logName) |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 224 | { |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 225 | const char *b; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 226 | int ret; |
| 227 | |
| 228 | if (!logName) { |
| 229 | return -1; /* NB: log_id_t is unsigned */ |
| 230 | } |
| 231 | b = strrchr(logName, '/'); |
| 232 | if (!b) { |
| 233 | b = logName; |
| 234 | } else { |
| 235 | ++b; |
| 236 | } |
| 237 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 238 | for(ret = LOG_ID_MIN; ret < LOG_ID_MAX; ++ret) { |
| 239 | const char *l = LOG_NAME[ret]; |
| 240 | if (l && !strcmp(b, l)) { |
| 241 | return ret; |
| 242 | } |
| 243 | } |
| 244 | return -1; /* should never happen */ |
| 245 | } |
| 246 | |
| 247 | struct logger_list { |
| 248 | struct listnode node; |
| 249 | int mode; |
| 250 | unsigned int tail; |
Mark Salyzyn | fa3716b | 2014-02-14 16:05:05 -0800 | [diff] [blame] | 251 | log_time start; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 252 | pid_t pid; |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 253 | int sock; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 254 | }; |
| 255 | |
| 256 | struct logger { |
| 257 | struct listnode node; |
| 258 | struct logger_list *top; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 259 | log_id_t id; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 260 | }; |
| 261 | |
| 262 | /* android_logger_alloc unimplemented, no use case */ |
| 263 | /* android_logger_free not exported */ |
| 264 | static void android_logger_free(struct logger *logger) |
| 265 | { |
| 266 | if (!logger) { |
| 267 | return; |
| 268 | } |
| 269 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 270 | list_remove(&logger->node); |
| 271 | |
| 272 | free(logger); |
| 273 | } |
| 274 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 275 | /* android_logger_alloc unimplemented, no use case */ |
| 276 | |
| 277 | /* method for getting the associated sublog id */ |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 278 | log_id_t android_logger_get_id(struct logger *logger) |
| 279 | { |
| 280 | return logger->id; |
| 281 | } |
| 282 | |
| 283 | /* worker for sending the command to the logger */ |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 284 | static ssize_t send_log_msg(struct logger *logger, |
| 285 | const char *msg, char *buf, size_t buf_size) |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 286 | { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 287 | ssize_t ret; |
Mark Salyzyn | 696817d | 2014-04-18 14:49:28 -0700 | [diff] [blame] | 288 | size_t len; |
| 289 | char *cp; |
Greg Hackmann | 8084a53 | 2014-03-17 13:08:31 -0700 | [diff] [blame] | 290 | int errno_save = 0; |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 291 | int sock = socket_local_client("logd", ANDROID_SOCKET_NAMESPACE_RESERVED, |
| 292 | SOCK_STREAM); |
| 293 | if (sock < 0) { |
Greg Hackmann | 8084a53 | 2014-03-17 13:08:31 -0700 | [diff] [blame] | 294 | return sock; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 295 | } |
| 296 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 297 | if (msg) { |
| 298 | snprintf(buf, buf_size, msg, logger ? logger->id : (unsigned) -1); |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 299 | } |
| 300 | |
Mark Salyzyn | 696817d | 2014-04-18 14:49:28 -0700 | [diff] [blame] | 301 | len = strlen(buf) + 1; |
| 302 | ret = TEMP_FAILURE_RETRY(write(sock, buf, len)); |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 303 | if (ret <= 0) { |
| 304 | goto done; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 305 | } |
| 306 | |
Mark Salyzyn | 696817d | 2014-04-18 14:49:28 -0700 | [diff] [blame] | 307 | len = buf_size; |
| 308 | cp = buf; |
| 309 | while ((ret = TEMP_FAILURE_RETRY(read(sock, cp, len))) > 0) { |
| 310 | struct pollfd p; |
| 311 | |
| 312 | if (((size_t)ret == len) || (buf_size < PAGE_SIZE)) { |
| 313 | break; |
| 314 | } |
| 315 | |
| 316 | len -= ret; |
| 317 | cp += ret; |
| 318 | |
| 319 | memset(&p, 0, sizeof(p)); |
| 320 | p.fd = sock; |
| 321 | p.events = POLLIN; |
| 322 | |
| 323 | /* Give other side 20ms to refill pipe */ |
| 324 | ret = TEMP_FAILURE_RETRY(poll(&p, 1, 20)); |
| 325 | |
| 326 | if (ret <= 0) { |
| 327 | break; |
| 328 | } |
| 329 | |
| 330 | if (!(p.revents & POLLIN)) { |
| 331 | ret = 0; |
| 332 | break; |
| 333 | } |
| 334 | } |
| 335 | |
| 336 | if (ret >= 0) { |
| 337 | ret += buf_size - len; |
| 338 | } |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 339 | |
| 340 | done: |
| 341 | if ((ret == -1) && errno) { |
Greg Hackmann | 8084a53 | 2014-03-17 13:08:31 -0700 | [diff] [blame] | 342 | errno_save = errno; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 343 | } |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 344 | close(sock); |
Greg Hackmann | 8084a53 | 2014-03-17 13:08:31 -0700 | [diff] [blame] | 345 | if (errno_save) { |
| 346 | errno = errno_save; |
| 347 | } |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 348 | return ret; |
| 349 | } |
| 350 | |
Mark Salyzyn | dfa7a07 | 2014-02-11 12:29:31 -0800 | [diff] [blame] | 351 | static int check_log_success(char *buf, ssize_t ret) |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 352 | { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 353 | if (ret < 0) { |
| 354 | return ret; |
| 355 | } |
| 356 | |
| 357 | if (strncmp(buf, "success", 7)) { |
Greg Hackmann | 8084a53 | 2014-03-17 13:08:31 -0700 | [diff] [blame] | 358 | errno = EINVAL; |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 359 | return -1; |
| 360 | } |
| 361 | |
| 362 | return 0; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 363 | } |
| 364 | |
Mark Salyzyn | 6eef417 | 2014-12-15 09:51:39 -0800 | [diff] [blame] | 365 | /* Determine the credentials of the caller */ |
| 366 | static bool uid_has_log_permission(uid_t uid) |
| 367 | { |
| 368 | return (uid == AID_SYSTEM) || (uid == AID_LOG) || (uid == AID_ROOT); |
| 369 | } |
| 370 | |
| 371 | static uid_t get_best_effective_uid() |
| 372 | { |
| 373 | uid_t euid; |
| 374 | uid_t uid; |
| 375 | gid_t gid; |
| 376 | ssize_t i; |
| 377 | static uid_t last_uid = (uid_t) -1; |
| 378 | |
| 379 | if (last_uid != (uid_t) -1) { |
| 380 | return last_uid; |
| 381 | } |
| 382 | uid = getuid(); |
| 383 | if (uid_has_log_permission(uid)) { |
| 384 | return last_uid = uid; |
| 385 | } |
| 386 | euid = geteuid(); |
| 387 | if (uid_has_log_permission(euid)) { |
| 388 | return last_uid = euid; |
| 389 | } |
| 390 | gid = getgid(); |
| 391 | if (uid_has_log_permission(gid)) { |
| 392 | return last_uid = gid; |
| 393 | } |
| 394 | gid = getegid(); |
| 395 | if (uid_has_log_permission(gid)) { |
| 396 | return last_uid = gid; |
| 397 | } |
| 398 | i = getgroups((size_t) 0, NULL); |
| 399 | if (i > 0) { |
| 400 | gid_t list[i]; |
| 401 | |
| 402 | getgroups(i, list); |
| 403 | while (--i >= 0) { |
| 404 | if (uid_has_log_permission(list[i])) { |
| 405 | return last_uid = list[i]; |
| 406 | } |
| 407 | } |
| 408 | } |
| 409 | return last_uid = uid; |
| 410 | } |
| 411 | |
Mark Salyzyn | dfa7a07 | 2014-02-11 12:29:31 -0800 | [diff] [blame] | 412 | int android_logger_clear(struct logger *logger) |
| 413 | { |
| 414 | char buf[512]; |
| 415 | |
Mark Salyzyn | 6eef417 | 2014-12-15 09:51:39 -0800 | [diff] [blame] | 416 | if (logger->top->mode & ANDROID_LOG_PSTORE) { |
| 417 | if (uid_has_log_permission(get_best_effective_uid())) { |
| 418 | return unlink("/sys/fs/pstore/pmsg-ramoops-0"); |
| 419 | } |
| 420 | errno = EPERM; |
| 421 | return -1; |
| 422 | } |
Mark Salyzyn | dfa7a07 | 2014-02-11 12:29:31 -0800 | [diff] [blame] | 423 | return check_log_success(buf, |
| 424 | send_log_msg(logger, "clear %d", buf, sizeof(buf))); |
| 425 | } |
| 426 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 427 | /* returns the total size of the log's ring buffer */ |
Mark Salyzyn | dfa7a07 | 2014-02-11 12:29:31 -0800 | [diff] [blame] | 428 | long android_logger_get_log_size(struct logger *logger) |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 429 | { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 430 | char buf[512]; |
| 431 | |
| 432 | ssize_t ret = send_log_msg(logger, "getLogSize %d", buf, sizeof(buf)); |
| 433 | if (ret < 0) { |
| 434 | return ret; |
| 435 | } |
| 436 | |
| 437 | if ((buf[0] < '0') || ('9' < buf[0])) { |
| 438 | return -1; |
| 439 | } |
| 440 | |
Mark Salyzyn | dfa7a07 | 2014-02-11 12:29:31 -0800 | [diff] [blame] | 441 | return atol(buf); |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 442 | } |
| 443 | |
Mark Salyzyn | dfa7a07 | 2014-02-11 12:29:31 -0800 | [diff] [blame] | 444 | int android_logger_set_log_size(struct logger *logger, unsigned long size) |
| 445 | { |
| 446 | char buf[512]; |
| 447 | |
| 448 | snprintf(buf, sizeof(buf), "setLogSize %d %lu", |
| 449 | logger ? logger->id : (unsigned) -1, size); |
| 450 | |
| 451 | return check_log_success(buf, send_log_msg(NULL, NULL, buf, sizeof(buf))); |
| 452 | } |
| 453 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 454 | /* |
| 455 | * returns the readable size of the log's ring buffer (that is, amount of the |
| 456 | * log consumed) |
| 457 | */ |
Mark Salyzyn | dfa7a07 | 2014-02-11 12:29:31 -0800 | [diff] [blame] | 458 | long android_logger_get_log_readable_size(struct logger *logger) |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 459 | { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 460 | char buf[512]; |
| 461 | |
| 462 | ssize_t ret = send_log_msg(logger, "getLogSizeUsed %d", buf, sizeof(buf)); |
| 463 | if (ret < 0) { |
| 464 | return ret; |
| 465 | } |
| 466 | |
| 467 | if ((buf[0] < '0') || ('9' < buf[0])) { |
| 468 | return -1; |
| 469 | } |
| 470 | |
Mark Salyzyn | dfa7a07 | 2014-02-11 12:29:31 -0800 | [diff] [blame] | 471 | return atol(buf); |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 472 | } |
| 473 | |
| 474 | /* |
| 475 | * returns the logger version |
| 476 | */ |
Mark Salyzyn | a04464a | 2014-04-30 08:50:53 -0700 | [diff] [blame] | 477 | int android_logger_get_log_version(struct logger *logger __unused) |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 478 | { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 479 | return 3; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 480 | } |
| 481 | |
Mark Salyzyn | 34facab | 2014-02-06 14:48:50 -0800 | [diff] [blame] | 482 | /* |
| 483 | * returns statistics |
| 484 | */ |
| 485 | ssize_t android_logger_get_statistics(struct logger_list *logger_list, |
| 486 | char *buf, size_t len) |
| 487 | { |
Mark Salyzyn | 34facab | 2014-02-06 14:48:50 -0800 | [diff] [blame] | 488 | struct logger *logger; |
| 489 | char *cp = buf; |
| 490 | size_t remaining = len; |
| 491 | size_t n; |
| 492 | |
| 493 | n = snprintf(cp, remaining, "getStatistics"); |
| 494 | n = min(n, remaining); |
| 495 | remaining -= n; |
| 496 | cp += n; |
| 497 | |
| 498 | logger_for_each(logger, logger_list) { |
| 499 | n = snprintf(cp, remaining, " %d", logger->id); |
| 500 | n = min(n, remaining); |
| 501 | remaining -= n; |
| 502 | cp += n; |
| 503 | } |
Mark Salyzyn | ee3b838 | 2015-12-17 09:58:43 -0800 | [diff] [blame^] | 504 | |
| 505 | if (logger_list->pid) { |
| 506 | n = snprintf(cp, remaining, " pid=%u", logger_list->pid); |
| 507 | n = min(n, remaining); |
| 508 | remaining -= n; |
| 509 | cp += n; |
| 510 | } |
| 511 | |
Mark Salyzyn | 34facab | 2014-02-06 14:48:50 -0800 | [diff] [blame] | 512 | return send_log_msg(NULL, NULL, buf, len); |
| 513 | } |
| 514 | |
Mark Salyzyn | a04464a | 2014-04-30 08:50:53 -0700 | [diff] [blame] | 515 | ssize_t android_logger_get_prune_list(struct logger_list *logger_list __unused, |
Mark Salyzyn | dfa7a07 | 2014-02-11 12:29:31 -0800 | [diff] [blame] | 516 | char *buf, size_t len) |
| 517 | { |
| 518 | return send_log_msg(NULL, "getPruneList", buf, len); |
| 519 | } |
| 520 | |
Mark Salyzyn | a04464a | 2014-04-30 08:50:53 -0700 | [diff] [blame] | 521 | int android_logger_set_prune_list(struct logger_list *logger_list __unused, |
Mark Salyzyn | dfa7a07 | 2014-02-11 12:29:31 -0800 | [diff] [blame] | 522 | char *buf, size_t len) |
| 523 | { |
| 524 | const char cmd[] = "setPruneList "; |
| 525 | const size_t cmdlen = sizeof(cmd) - 1; |
| 526 | |
| 527 | if (strlen(buf) > (len - cmdlen)) { |
| 528 | return -ENOMEM; /* KISS */ |
| 529 | } |
| 530 | memmove(buf + cmdlen, buf, len - cmdlen); |
| 531 | buf[len - 1] = '\0'; |
| 532 | memcpy(buf, cmd, cmdlen); |
| 533 | |
| 534 | return check_log_success(buf, send_log_msg(NULL, NULL, buf, len)); |
| 535 | } |
| 536 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 537 | struct logger_list *android_logger_list_alloc(int mode, |
| 538 | unsigned int tail, |
| 539 | pid_t pid) |
| 540 | { |
| 541 | struct logger_list *logger_list; |
| 542 | |
| 543 | logger_list = calloc(1, sizeof(*logger_list)); |
| 544 | if (!logger_list) { |
| 545 | return NULL; |
| 546 | } |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 547 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 548 | list_init(&logger_list->node); |
| 549 | logger_list->mode = mode; |
Mark Salyzyn | fa3716b | 2014-02-14 16:05:05 -0800 | [diff] [blame] | 550 | logger_list->start.tv_sec = 0; |
| 551 | logger_list->start.tv_nsec = 0; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 552 | logger_list->tail = tail; |
| 553 | logger_list->pid = pid; |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 554 | logger_list->sock = -1; |
| 555 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 556 | return logger_list; |
| 557 | } |
| 558 | |
Mark Salyzyn | fa3716b | 2014-02-14 16:05:05 -0800 | [diff] [blame] | 559 | struct logger_list *android_logger_list_alloc_time(int mode, |
| 560 | log_time start, |
| 561 | pid_t pid) |
| 562 | { |
| 563 | struct logger_list *logger_list; |
| 564 | |
| 565 | logger_list = calloc(1, sizeof(*logger_list)); |
| 566 | if (!logger_list) { |
| 567 | return NULL; |
| 568 | } |
| 569 | |
| 570 | list_init(&logger_list->node); |
| 571 | logger_list->mode = mode; |
| 572 | logger_list->start = start; |
| 573 | logger_list->tail = 0; |
| 574 | logger_list->pid = pid; |
| 575 | logger_list->sock = -1; |
| 576 | |
| 577 | return logger_list; |
| 578 | } |
| 579 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 580 | /* android_logger_list_register unimplemented, no use case */ |
| 581 | /* android_logger_list_unregister unimplemented, no use case */ |
| 582 | |
| 583 | /* Open the named log and add it to the logger list */ |
| 584 | struct logger *android_logger_open(struct logger_list *logger_list, |
| 585 | log_id_t id) |
| 586 | { |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 587 | struct logger *logger; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 588 | |
| 589 | if (!logger_list || (id >= LOG_ID_MAX)) { |
| 590 | goto err; |
| 591 | } |
| 592 | |
| 593 | logger_for_each(logger, logger_list) { |
| 594 | if (logger->id == id) { |
| 595 | goto ok; |
| 596 | } |
| 597 | } |
| 598 | |
| 599 | logger = calloc(1, sizeof(*logger)); |
| 600 | if (!logger) { |
| 601 | goto err; |
| 602 | } |
| 603 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 604 | logger->id = id; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 605 | list_add_tail(&logger_list->node, &logger->node); |
| 606 | logger->top = logger_list; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 607 | goto ok; |
| 608 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 609 | err: |
| 610 | logger = NULL; |
| 611 | ok: |
| 612 | return logger; |
| 613 | } |
| 614 | |
| 615 | /* Open the single named log and make it part of a new logger list */ |
| 616 | struct logger_list *android_logger_list_open(log_id_t id, |
| 617 | int mode, |
| 618 | unsigned int tail, |
| 619 | pid_t pid) |
| 620 | { |
| 621 | struct logger_list *logger_list = android_logger_list_alloc(mode, tail, pid); |
| 622 | if (!logger_list) { |
| 623 | return NULL; |
| 624 | } |
| 625 | |
| 626 | if (!android_logger_open(logger_list, id)) { |
| 627 | android_logger_list_free(logger_list); |
| 628 | return NULL; |
| 629 | } |
| 630 | |
| 631 | return logger_list; |
| 632 | } |
| 633 | |
Mark Salyzyn | 6eef417 | 2014-12-15 09:51:39 -0800 | [diff] [blame] | 634 | static int android_logger_list_read_pstore(struct logger_list *logger_list, |
| 635 | struct log_msg *log_msg) |
| 636 | { |
| 637 | ssize_t ret; |
| 638 | off_t current, next; |
| 639 | uid_t uid; |
| 640 | struct logger *logger; |
| 641 | struct __attribute__((__packed__)) { |
| 642 | android_pmsg_log_header_t p; |
| 643 | android_log_header_t l; |
| 644 | } buf; |
| 645 | static uint8_t preread_count; |
Mark Salyzyn | 8646a54 | 2015-12-07 08:45:12 -0800 | [diff] [blame] | 646 | bool is_system; |
Mark Salyzyn | 6eef417 | 2014-12-15 09:51:39 -0800 | [diff] [blame] | 647 | |
| 648 | memset(log_msg, 0, sizeof(*log_msg)); |
| 649 | |
| 650 | if (logger_list->sock < 0) { |
| 651 | int fd = open("/sys/fs/pstore/pmsg-ramoops-0", O_RDONLY); |
| 652 | |
| 653 | if (fd < 0) { |
| 654 | return -errno; |
| 655 | } |
| 656 | logger_list->sock = fd; |
| 657 | preread_count = 0; |
| 658 | } |
| 659 | |
| 660 | ret = 0; |
| 661 | while(1) { |
| 662 | if (preread_count < sizeof(buf)) { |
| 663 | ret = TEMP_FAILURE_RETRY(read(logger_list->sock, |
| 664 | &buf.p.magic + preread_count, |
| 665 | sizeof(buf) - preread_count)); |
| 666 | if (ret < 0) { |
| 667 | return -errno; |
| 668 | } |
| 669 | preread_count += ret; |
| 670 | } |
| 671 | if (preread_count != sizeof(buf)) { |
| 672 | return preread_count ? -EIO : -EAGAIN; |
| 673 | } |
| 674 | if ((buf.p.magic != LOGGER_MAGIC) |
| 675 | || (buf.p.len <= sizeof(buf)) |
| 676 | || (buf.p.len > (sizeof(buf) + LOGGER_ENTRY_MAX_PAYLOAD)) |
| 677 | || (buf.l.id >= LOG_ID_MAX) |
| 678 | || (buf.l.realtime.tv_nsec >= NS_PER_SEC)) { |
| 679 | do { |
| 680 | memmove(&buf.p.magic, &buf.p.magic + 1, --preread_count); |
| 681 | } while (preread_count && (buf.p.magic != LOGGER_MAGIC)); |
| 682 | continue; |
| 683 | } |
| 684 | preread_count = 0; |
| 685 | |
| 686 | logger_for_each(logger, logger_list) { |
| 687 | if (buf.l.id != logger->id) { |
| 688 | continue; |
| 689 | } |
| 690 | |
| 691 | if ((logger_list->start.tv_sec || logger_list->start.tv_nsec) |
| 692 | && ((logger_list->start.tv_sec > buf.l.realtime.tv_sec) |
| 693 | || ((logger_list->start.tv_sec == buf.l.realtime.tv_sec) |
| 694 | && (logger_list->start.tv_nsec > buf.l.realtime.tv_nsec)))) { |
| 695 | break; |
| 696 | } |
| 697 | |
| 698 | if (logger_list->pid && (logger_list->pid != buf.p.pid)) { |
| 699 | break; |
| 700 | } |
| 701 | |
| 702 | uid = get_best_effective_uid(); |
Mark Salyzyn | 8646a54 | 2015-12-07 08:45:12 -0800 | [diff] [blame] | 703 | is_system = uid_has_log_permission(uid); |
| 704 | if (!is_system && (uid != buf.p.uid)) { |
Mark Salyzyn | 6eef417 | 2014-12-15 09:51:39 -0800 | [diff] [blame] | 705 | break; |
| 706 | } |
| 707 | |
| 708 | ret = TEMP_FAILURE_RETRY(read(logger_list->sock, |
Mark Salyzyn | 8646a54 | 2015-12-07 08:45:12 -0800 | [diff] [blame] | 709 | is_system ? |
| 710 | log_msg->entry_v4.msg : |
| 711 | log_msg->entry_v3.msg, |
Mark Salyzyn | 6eef417 | 2014-12-15 09:51:39 -0800 | [diff] [blame] | 712 | buf.p.len - sizeof(buf))); |
| 713 | if (ret < 0) { |
| 714 | return -errno; |
| 715 | } |
| 716 | if (ret != (ssize_t)(buf.p.len - sizeof(buf))) { |
| 717 | return -EIO; |
| 718 | } |
| 719 | |
Mark Salyzyn | 8646a54 | 2015-12-07 08:45:12 -0800 | [diff] [blame] | 720 | log_msg->entry_v4.len = buf.p.len - sizeof(buf); |
| 721 | log_msg->entry_v4.hdr_size = is_system ? |
| 722 | sizeof(log_msg->entry_v4) : |
| 723 | sizeof(log_msg->entry_v3); |
| 724 | log_msg->entry_v4.pid = buf.p.pid; |
| 725 | log_msg->entry_v4.tid = buf.l.tid; |
| 726 | log_msg->entry_v4.sec = buf.l.realtime.tv_sec; |
| 727 | log_msg->entry_v4.nsec = buf.l.realtime.tv_nsec; |
| 728 | log_msg->entry_v4.lid = buf.l.id; |
| 729 | if (is_system) { |
| 730 | log_msg->entry_v4.uid = buf.p.uid; |
| 731 | } |
Mark Salyzyn | 6eef417 | 2014-12-15 09:51:39 -0800 | [diff] [blame] | 732 | |
| 733 | return ret; |
| 734 | } |
| 735 | |
| 736 | current = TEMP_FAILURE_RETRY(lseek(logger_list->sock, |
| 737 | (off_t)0, SEEK_CUR)); |
| 738 | if (current < 0) { |
| 739 | return -errno; |
| 740 | } |
| 741 | next = TEMP_FAILURE_RETRY(lseek(logger_list->sock, |
| 742 | (off_t)(buf.p.len - sizeof(buf)), |
| 743 | SEEK_CUR)); |
| 744 | if (next < 0) { |
| 745 | return -errno; |
| 746 | } |
| 747 | if ((next - current) != (ssize_t)(buf.p.len - sizeof(buf))) { |
| 748 | return -EIO; |
| 749 | } |
| 750 | } |
| 751 | } |
| 752 | |
Mark Salyzyn | a04464a | 2014-04-30 08:50:53 -0700 | [diff] [blame] | 753 | static void caught_signal(int signum __unused) |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 754 | { |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 755 | } |
| 756 | |
| 757 | /* Read from the selected logs */ |
| 758 | int android_logger_list_read(struct logger_list *logger_list, |
| 759 | struct log_msg *log_msg) |
| 760 | { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 761 | int ret, e; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 762 | struct logger *logger; |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 763 | struct sigaction ignore; |
| 764 | struct sigaction old_sigaction; |
| 765 | unsigned int old_alarm = 0; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 766 | |
| 767 | if (!logger_list) { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 768 | return -EINVAL; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 769 | } |
| 770 | |
Mark Salyzyn | 6eef417 | 2014-12-15 09:51:39 -0800 | [diff] [blame] | 771 | if (logger_list->mode & ANDROID_LOG_PSTORE) { |
| 772 | return android_logger_list_read_pstore(logger_list, log_msg); |
| 773 | } |
| 774 | |
Mark Salyzyn | 2d3f38a | 2015-01-26 10:46:44 -0800 | [diff] [blame] | 775 | if (logger_list->mode & ANDROID_LOG_NONBLOCK) { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 776 | memset(&ignore, 0, sizeof(ignore)); |
| 777 | ignore.sa_handler = caught_signal; |
| 778 | sigemptyset(&ignore.sa_mask); |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 779 | } |
| 780 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 781 | if (logger_list->sock < 0) { |
| 782 | char buffer[256], *cp, c; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 783 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 784 | int sock = socket_local_client("logdr", |
| 785 | ANDROID_SOCKET_NAMESPACE_RESERVED, |
| 786 | SOCK_SEQPACKET); |
| 787 | if (sock < 0) { |
| 788 | if ((sock == -1) && errno) { |
| 789 | return -errno; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 790 | } |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 791 | return sock; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 792 | } |
| 793 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 794 | strcpy(buffer, |
Mark Salyzyn | 2d3f38a | 2015-01-26 10:46:44 -0800 | [diff] [blame] | 795 | (logger_list->mode & ANDROID_LOG_NONBLOCK) ? "dumpAndClose" : "stream"); |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 796 | cp = buffer + strlen(buffer); |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 797 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 798 | strcpy(cp, " lids"); |
| 799 | cp += 5; |
| 800 | c = '='; |
| 801 | int remaining = sizeof(buffer) - (cp - buffer); |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 802 | logger_for_each(logger, logger_list) { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 803 | ret = snprintf(cp, remaining, "%c%u", c, logger->id); |
| 804 | ret = min(ret, remaining); |
| 805 | remaining -= ret; |
| 806 | cp += ret; |
| 807 | c = ','; |
| 808 | } |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 809 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 810 | if (logger_list->tail) { |
| 811 | ret = snprintf(cp, remaining, " tail=%u", logger_list->tail); |
| 812 | ret = min(ret, remaining); |
| 813 | remaining -= ret; |
| 814 | cp += ret; |
| 815 | } |
| 816 | |
Mark Salyzyn | fa3716b | 2014-02-14 16:05:05 -0800 | [diff] [blame] | 817 | if (logger_list->start.tv_sec || logger_list->start.tv_nsec) { |
Mark Salyzyn | f8e546e | 2015-11-30 11:36:09 -0800 | [diff] [blame] | 818 | if (logger_list->mode & ANDROID_LOG_WRAP) { |
| 819 | // ToDo: alternate API to allow timeout to be adjusted. |
| 820 | ret = snprintf(cp, remaining, " timeout=%u", |
| 821 | ANDROID_LOG_WRAP_DEFAULT_TIMEOUT); |
| 822 | ret = min(ret, remaining); |
| 823 | remaining -= ret; |
| 824 | cp += ret; |
| 825 | } |
Mark Salyzyn | fa3716b | 2014-02-14 16:05:05 -0800 | [diff] [blame] | 826 | ret = snprintf(cp, remaining, " start=%" PRIu32 ".%09" PRIu32, |
| 827 | logger_list->start.tv_sec, |
| 828 | logger_list->start.tv_nsec); |
| 829 | ret = min(ret, remaining); |
| 830 | remaining -= ret; |
| 831 | cp += ret; |
| 832 | } |
| 833 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 834 | if (logger_list->pid) { |
| 835 | ret = snprintf(cp, remaining, " pid=%u", logger_list->pid); |
| 836 | ret = min(ret, remaining); |
| 837 | remaining -= ret; |
| 838 | cp += ret; |
| 839 | } |
| 840 | |
Mark Salyzyn | 2d3f38a | 2015-01-26 10:46:44 -0800 | [diff] [blame] | 841 | if (logger_list->mode & ANDROID_LOG_NONBLOCK) { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 842 | /* Deal with an unresponsive logd */ |
| 843 | sigaction(SIGALRM, &ignore, &old_sigaction); |
| 844 | old_alarm = alarm(30); |
| 845 | } |
| 846 | ret = write(sock, buffer, cp - buffer); |
| 847 | e = errno; |
Mark Salyzyn | 2d3f38a | 2015-01-26 10:46:44 -0800 | [diff] [blame] | 848 | if (logger_list->mode & ANDROID_LOG_NONBLOCK) { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 849 | if (e == EINTR) { |
| 850 | e = ETIMEDOUT; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 851 | } |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 852 | alarm(old_alarm); |
| 853 | sigaction(SIGALRM, &old_sigaction, NULL); |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 854 | } |
| 855 | |
| 856 | if (ret <= 0) { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 857 | close(sock); |
| 858 | if ((ret == -1) && e) { |
| 859 | return -e; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 860 | } |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 861 | if (ret == 0) { |
| 862 | return -EIO; |
| 863 | } |
| 864 | return ret; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 865 | } |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 866 | |
| 867 | logger_list->sock = sock; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 868 | } |
| 869 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 870 | ret = 0; |
| 871 | while(1) { |
| 872 | memset(log_msg, 0, sizeof(*log_msg)); |
| 873 | |
Mark Salyzyn | 2d3f38a | 2015-01-26 10:46:44 -0800 | [diff] [blame] | 874 | if (logger_list->mode & ANDROID_LOG_NONBLOCK) { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 875 | /* particularily useful if tombstone is reporting for logd */ |
| 876 | sigaction(SIGALRM, &ignore, &old_sigaction); |
| 877 | old_alarm = alarm(30); |
| 878 | } |
| 879 | /* NOTE: SOCK_SEQPACKET guarantees we read exactly one full entry */ |
| 880 | ret = recv(logger_list->sock, log_msg, LOGGER_ENTRY_MAX_LEN, 0); |
| 881 | e = errno; |
Mark Salyzyn | 2d3f38a | 2015-01-26 10:46:44 -0800 | [diff] [blame] | 882 | if (logger_list->mode & ANDROID_LOG_NONBLOCK) { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 883 | if ((ret == 0) || (e == EINTR)) { |
| 884 | e = EAGAIN; |
| 885 | ret = -1; |
| 886 | } |
| 887 | alarm(old_alarm); |
| 888 | sigaction(SIGALRM, &old_sigaction, NULL); |
| 889 | } |
| 890 | |
Mark Salyzyn | 43e9281 | 2015-02-26 11:21:47 -0800 | [diff] [blame] | 891 | if ((ret == -1) && e) { |
| 892 | return -e; |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 893 | } |
Mark Salyzyn | 43e9281 | 2015-02-26 11:21:47 -0800 | [diff] [blame] | 894 | return ret; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 895 | } |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 896 | /* NOTREACH */ |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 897 | return ret; |
| 898 | } |
| 899 | |
| 900 | /* Close all the logs */ |
| 901 | void android_logger_list_free(struct logger_list *logger_list) |
| 902 | { |
| 903 | if (logger_list == NULL) { |
| 904 | return; |
| 905 | } |
| 906 | |
| 907 | while (!list_empty(&logger_list->node)) { |
| 908 | struct listnode *node = list_head(&logger_list->node); |
| 909 | struct logger *logger = node_to_item(node, struct logger, node); |
| 910 | android_logger_free(logger); |
| 911 | } |
| 912 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 913 | if (logger_list->sock >= 0) { |
| 914 | close (logger_list->sock); |
| 915 | } |
| 916 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 917 | free(logger_list); |
| 918 | } |