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 | |
Mark Salyzyn | 9568705 | 2014-10-02 11:12:28 -0700 | [diff] [blame] | 40 | #if (defined(USE_MINGW) || defined(HAVE_WINSOCK)) |
| 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 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 51 | #ifdef HAVE_WINSOCK |
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 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 59 | #else /* !HAVE_WINSOCK */ |
| 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 | |
| 196 | #endif /* !HAVE_WINSOCK */ |
| 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 | 440e109 | 2014-10-10 15:13:15 -0700 | [diff] [blame] | 211 | [LOG_ID_KERNEL] = "kernel", |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 212 | }; |
| 213 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 214 | const char *android_log_id_to_name(log_id_t log_id) |
| 215 | { |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 216 | if (log_id >= LOG_ID_MAX) { |
| 217 | log_id = LOG_ID_MAIN; |
| 218 | } |
| 219 | return LOG_NAME[log_id]; |
| 220 | } |
| 221 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 222 | log_id_t android_name_to_log_id(const char *logName) |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 223 | { |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 224 | const char *b; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 225 | int ret; |
| 226 | |
| 227 | if (!logName) { |
| 228 | return -1; /* NB: log_id_t is unsigned */ |
| 229 | } |
| 230 | b = strrchr(logName, '/'); |
| 231 | if (!b) { |
| 232 | b = logName; |
| 233 | } else { |
| 234 | ++b; |
| 235 | } |
| 236 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 237 | for(ret = LOG_ID_MIN; ret < LOG_ID_MAX; ++ret) { |
| 238 | const char *l = LOG_NAME[ret]; |
| 239 | if (l && !strcmp(b, l)) { |
| 240 | return ret; |
| 241 | } |
| 242 | } |
| 243 | return -1; /* should never happen */ |
| 244 | } |
| 245 | |
| 246 | struct logger_list { |
| 247 | struct listnode node; |
| 248 | int mode; |
| 249 | unsigned int tail; |
Mark Salyzyn | fa3716b | 2014-02-14 16:05:05 -0800 | [diff] [blame] | 250 | log_time start; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 251 | pid_t pid; |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 252 | int sock; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 253 | }; |
| 254 | |
| 255 | struct logger { |
| 256 | struct listnode node; |
| 257 | struct logger_list *top; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 258 | log_id_t id; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 259 | }; |
| 260 | |
| 261 | /* android_logger_alloc unimplemented, no use case */ |
| 262 | /* android_logger_free not exported */ |
| 263 | static void android_logger_free(struct logger *logger) |
| 264 | { |
| 265 | if (!logger) { |
| 266 | return; |
| 267 | } |
| 268 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 269 | list_remove(&logger->node); |
| 270 | |
| 271 | free(logger); |
| 272 | } |
| 273 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 274 | /* android_logger_alloc unimplemented, no use case */ |
| 275 | |
| 276 | /* method for getting the associated sublog id */ |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 277 | log_id_t android_logger_get_id(struct logger *logger) |
| 278 | { |
| 279 | return logger->id; |
| 280 | } |
| 281 | |
| 282 | /* worker for sending the command to the logger */ |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 283 | static ssize_t send_log_msg(struct logger *logger, |
| 284 | const char *msg, char *buf, size_t buf_size) |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 285 | { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 286 | ssize_t ret; |
Mark Salyzyn | 696817d | 2014-04-18 14:49:28 -0700 | [diff] [blame] | 287 | size_t len; |
| 288 | char *cp; |
Greg Hackmann | 8084a53 | 2014-03-17 13:08:31 -0700 | [diff] [blame] | 289 | int errno_save = 0; |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 290 | int sock = socket_local_client("logd", ANDROID_SOCKET_NAMESPACE_RESERVED, |
| 291 | SOCK_STREAM); |
| 292 | if (sock < 0) { |
Greg Hackmann | 8084a53 | 2014-03-17 13:08:31 -0700 | [diff] [blame] | 293 | return sock; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 294 | } |
| 295 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 296 | if (msg) { |
| 297 | snprintf(buf, buf_size, msg, logger ? logger->id : (unsigned) -1); |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 298 | } |
| 299 | |
Mark Salyzyn | 696817d | 2014-04-18 14:49:28 -0700 | [diff] [blame] | 300 | len = strlen(buf) + 1; |
| 301 | ret = TEMP_FAILURE_RETRY(write(sock, buf, len)); |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 302 | if (ret <= 0) { |
| 303 | goto done; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 304 | } |
| 305 | |
Mark Salyzyn | 696817d | 2014-04-18 14:49:28 -0700 | [diff] [blame] | 306 | len = buf_size; |
| 307 | cp = buf; |
| 308 | while ((ret = TEMP_FAILURE_RETRY(read(sock, cp, len))) > 0) { |
| 309 | struct pollfd p; |
| 310 | |
| 311 | if (((size_t)ret == len) || (buf_size < PAGE_SIZE)) { |
| 312 | break; |
| 313 | } |
| 314 | |
| 315 | len -= ret; |
| 316 | cp += ret; |
| 317 | |
| 318 | memset(&p, 0, sizeof(p)); |
| 319 | p.fd = sock; |
| 320 | p.events = POLLIN; |
| 321 | |
| 322 | /* Give other side 20ms to refill pipe */ |
| 323 | ret = TEMP_FAILURE_RETRY(poll(&p, 1, 20)); |
| 324 | |
| 325 | if (ret <= 0) { |
| 326 | break; |
| 327 | } |
| 328 | |
| 329 | if (!(p.revents & POLLIN)) { |
| 330 | ret = 0; |
| 331 | break; |
| 332 | } |
| 333 | } |
| 334 | |
| 335 | if (ret >= 0) { |
| 336 | ret += buf_size - len; |
| 337 | } |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 338 | |
| 339 | done: |
| 340 | if ((ret == -1) && errno) { |
Greg Hackmann | 8084a53 | 2014-03-17 13:08:31 -0700 | [diff] [blame] | 341 | errno_save = errno; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 342 | } |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 343 | close(sock); |
Greg Hackmann | 8084a53 | 2014-03-17 13:08:31 -0700 | [diff] [blame] | 344 | if (errno_save) { |
| 345 | errno = errno_save; |
| 346 | } |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 347 | return ret; |
| 348 | } |
| 349 | |
Mark Salyzyn | dfa7a07 | 2014-02-11 12:29:31 -0800 | [diff] [blame] | 350 | static int check_log_success(char *buf, ssize_t ret) |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 351 | { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 352 | if (ret < 0) { |
| 353 | return ret; |
| 354 | } |
| 355 | |
| 356 | if (strncmp(buf, "success", 7)) { |
Greg Hackmann | 8084a53 | 2014-03-17 13:08:31 -0700 | [diff] [blame] | 357 | errno = EINVAL; |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 358 | return -1; |
| 359 | } |
| 360 | |
| 361 | return 0; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 362 | } |
| 363 | |
Mark Salyzyn | 6eef417 | 2014-12-15 09:51:39 -0800 | [diff] [blame] | 364 | /* Determine the credentials of the caller */ |
| 365 | static bool uid_has_log_permission(uid_t uid) |
| 366 | { |
| 367 | return (uid == AID_SYSTEM) || (uid == AID_LOG) || (uid == AID_ROOT); |
| 368 | } |
| 369 | |
| 370 | static uid_t get_best_effective_uid() |
| 371 | { |
| 372 | uid_t euid; |
| 373 | uid_t uid; |
| 374 | gid_t gid; |
| 375 | ssize_t i; |
| 376 | static uid_t last_uid = (uid_t) -1; |
| 377 | |
| 378 | if (last_uid != (uid_t) -1) { |
| 379 | return last_uid; |
| 380 | } |
| 381 | uid = getuid(); |
| 382 | if (uid_has_log_permission(uid)) { |
| 383 | return last_uid = uid; |
| 384 | } |
| 385 | euid = geteuid(); |
| 386 | if (uid_has_log_permission(euid)) { |
| 387 | return last_uid = euid; |
| 388 | } |
| 389 | gid = getgid(); |
| 390 | if (uid_has_log_permission(gid)) { |
| 391 | return last_uid = gid; |
| 392 | } |
| 393 | gid = getegid(); |
| 394 | if (uid_has_log_permission(gid)) { |
| 395 | return last_uid = gid; |
| 396 | } |
| 397 | i = getgroups((size_t) 0, NULL); |
| 398 | if (i > 0) { |
| 399 | gid_t list[i]; |
| 400 | |
| 401 | getgroups(i, list); |
| 402 | while (--i >= 0) { |
| 403 | if (uid_has_log_permission(list[i])) { |
| 404 | return last_uid = list[i]; |
| 405 | } |
| 406 | } |
| 407 | } |
| 408 | return last_uid = uid; |
| 409 | } |
| 410 | |
Mark Salyzyn | dfa7a07 | 2014-02-11 12:29:31 -0800 | [diff] [blame] | 411 | int android_logger_clear(struct logger *logger) |
| 412 | { |
| 413 | char buf[512]; |
| 414 | |
Mark Salyzyn | 6eef417 | 2014-12-15 09:51:39 -0800 | [diff] [blame] | 415 | if (logger->top->mode & ANDROID_LOG_PSTORE) { |
| 416 | if (uid_has_log_permission(get_best_effective_uid())) { |
| 417 | return unlink("/sys/fs/pstore/pmsg-ramoops-0"); |
| 418 | } |
| 419 | errno = EPERM; |
| 420 | return -1; |
| 421 | } |
Mark Salyzyn | dfa7a07 | 2014-02-11 12:29:31 -0800 | [diff] [blame] | 422 | return check_log_success(buf, |
| 423 | send_log_msg(logger, "clear %d", buf, sizeof(buf))); |
| 424 | } |
| 425 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 426 | /* returns the total size of the log's ring buffer */ |
Mark Salyzyn | dfa7a07 | 2014-02-11 12:29:31 -0800 | [diff] [blame] | 427 | long android_logger_get_log_size(struct logger *logger) |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 428 | { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 429 | char buf[512]; |
| 430 | |
| 431 | ssize_t ret = send_log_msg(logger, "getLogSize %d", buf, sizeof(buf)); |
| 432 | if (ret < 0) { |
| 433 | return ret; |
| 434 | } |
| 435 | |
| 436 | if ((buf[0] < '0') || ('9' < buf[0])) { |
| 437 | return -1; |
| 438 | } |
| 439 | |
Mark Salyzyn | dfa7a07 | 2014-02-11 12:29:31 -0800 | [diff] [blame] | 440 | return atol(buf); |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 441 | } |
| 442 | |
Mark Salyzyn | dfa7a07 | 2014-02-11 12:29:31 -0800 | [diff] [blame] | 443 | int android_logger_set_log_size(struct logger *logger, unsigned long size) |
| 444 | { |
| 445 | char buf[512]; |
| 446 | |
| 447 | snprintf(buf, sizeof(buf), "setLogSize %d %lu", |
| 448 | logger ? logger->id : (unsigned) -1, size); |
| 449 | |
| 450 | return check_log_success(buf, send_log_msg(NULL, NULL, buf, sizeof(buf))); |
| 451 | } |
| 452 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 453 | /* |
| 454 | * returns the readable size of the log's ring buffer (that is, amount of the |
| 455 | * log consumed) |
| 456 | */ |
Mark Salyzyn | dfa7a07 | 2014-02-11 12:29:31 -0800 | [diff] [blame] | 457 | long android_logger_get_log_readable_size(struct logger *logger) |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 458 | { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 459 | char buf[512]; |
| 460 | |
| 461 | ssize_t ret = send_log_msg(logger, "getLogSizeUsed %d", buf, sizeof(buf)); |
| 462 | if (ret < 0) { |
| 463 | return ret; |
| 464 | } |
| 465 | |
| 466 | if ((buf[0] < '0') || ('9' < buf[0])) { |
| 467 | return -1; |
| 468 | } |
| 469 | |
Mark Salyzyn | dfa7a07 | 2014-02-11 12:29:31 -0800 | [diff] [blame] | 470 | return atol(buf); |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 471 | } |
| 472 | |
| 473 | /* |
| 474 | * returns the logger version |
| 475 | */ |
Mark Salyzyn | a04464a | 2014-04-30 08:50:53 -0700 | [diff] [blame] | 476 | int android_logger_get_log_version(struct logger *logger __unused) |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 477 | { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 478 | return 3; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 479 | } |
| 480 | |
Mark Salyzyn | 34facab | 2014-02-06 14:48:50 -0800 | [diff] [blame] | 481 | /* |
| 482 | * returns statistics |
| 483 | */ |
| 484 | ssize_t android_logger_get_statistics(struct logger_list *logger_list, |
| 485 | char *buf, size_t len) |
| 486 | { |
Mark Salyzyn | 34facab | 2014-02-06 14:48:50 -0800 | [diff] [blame] | 487 | struct logger *logger; |
| 488 | char *cp = buf; |
| 489 | size_t remaining = len; |
| 490 | size_t n; |
| 491 | |
| 492 | n = snprintf(cp, remaining, "getStatistics"); |
| 493 | n = min(n, remaining); |
| 494 | remaining -= n; |
| 495 | cp += n; |
| 496 | |
| 497 | logger_for_each(logger, logger_list) { |
| 498 | n = snprintf(cp, remaining, " %d", logger->id); |
| 499 | n = min(n, remaining); |
| 500 | remaining -= n; |
| 501 | cp += n; |
| 502 | } |
| 503 | return send_log_msg(NULL, NULL, buf, len); |
| 504 | } |
| 505 | |
Mark Salyzyn | a04464a | 2014-04-30 08:50:53 -0700 | [diff] [blame] | 506 | 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] | 507 | char *buf, size_t len) |
| 508 | { |
| 509 | return send_log_msg(NULL, "getPruneList", buf, len); |
| 510 | } |
| 511 | |
Mark Salyzyn | a04464a | 2014-04-30 08:50:53 -0700 | [diff] [blame] | 512 | int android_logger_set_prune_list(struct logger_list *logger_list __unused, |
Mark Salyzyn | dfa7a07 | 2014-02-11 12:29:31 -0800 | [diff] [blame] | 513 | char *buf, size_t len) |
| 514 | { |
| 515 | const char cmd[] = "setPruneList "; |
| 516 | const size_t cmdlen = sizeof(cmd) - 1; |
| 517 | |
| 518 | if (strlen(buf) > (len - cmdlen)) { |
| 519 | return -ENOMEM; /* KISS */ |
| 520 | } |
| 521 | memmove(buf + cmdlen, buf, len - cmdlen); |
| 522 | buf[len - 1] = '\0'; |
| 523 | memcpy(buf, cmd, cmdlen); |
| 524 | |
| 525 | return check_log_success(buf, send_log_msg(NULL, NULL, buf, len)); |
| 526 | } |
| 527 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 528 | struct logger_list *android_logger_list_alloc(int mode, |
| 529 | unsigned int tail, |
| 530 | pid_t pid) |
| 531 | { |
| 532 | struct logger_list *logger_list; |
| 533 | |
| 534 | logger_list = calloc(1, sizeof(*logger_list)); |
| 535 | if (!logger_list) { |
| 536 | return NULL; |
| 537 | } |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 538 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 539 | list_init(&logger_list->node); |
| 540 | logger_list->mode = mode; |
Mark Salyzyn | fa3716b | 2014-02-14 16:05:05 -0800 | [diff] [blame] | 541 | logger_list->start.tv_sec = 0; |
| 542 | logger_list->start.tv_nsec = 0; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 543 | logger_list->tail = tail; |
| 544 | logger_list->pid = pid; |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 545 | logger_list->sock = -1; |
| 546 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 547 | return logger_list; |
| 548 | } |
| 549 | |
Mark Salyzyn | fa3716b | 2014-02-14 16:05:05 -0800 | [diff] [blame] | 550 | struct logger_list *android_logger_list_alloc_time(int mode, |
| 551 | log_time start, |
| 552 | pid_t pid) |
| 553 | { |
| 554 | struct logger_list *logger_list; |
| 555 | |
| 556 | logger_list = calloc(1, sizeof(*logger_list)); |
| 557 | if (!logger_list) { |
| 558 | return NULL; |
| 559 | } |
| 560 | |
| 561 | list_init(&logger_list->node); |
| 562 | logger_list->mode = mode; |
| 563 | logger_list->start = start; |
| 564 | logger_list->tail = 0; |
| 565 | logger_list->pid = pid; |
| 566 | logger_list->sock = -1; |
| 567 | |
| 568 | return logger_list; |
| 569 | } |
| 570 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 571 | /* android_logger_list_register unimplemented, no use case */ |
| 572 | /* android_logger_list_unregister unimplemented, no use case */ |
| 573 | |
| 574 | /* Open the named log and add it to the logger list */ |
| 575 | struct logger *android_logger_open(struct logger_list *logger_list, |
| 576 | log_id_t id) |
| 577 | { |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 578 | struct logger *logger; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 579 | |
| 580 | if (!logger_list || (id >= LOG_ID_MAX)) { |
| 581 | goto err; |
| 582 | } |
| 583 | |
| 584 | logger_for_each(logger, logger_list) { |
| 585 | if (logger->id == id) { |
| 586 | goto ok; |
| 587 | } |
| 588 | } |
| 589 | |
| 590 | logger = calloc(1, sizeof(*logger)); |
| 591 | if (!logger) { |
| 592 | goto err; |
| 593 | } |
| 594 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 595 | logger->id = id; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 596 | list_add_tail(&logger_list->node, &logger->node); |
| 597 | logger->top = logger_list; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 598 | goto ok; |
| 599 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 600 | err: |
| 601 | logger = NULL; |
| 602 | ok: |
| 603 | return logger; |
| 604 | } |
| 605 | |
| 606 | /* Open the single named log and make it part of a new logger list */ |
| 607 | struct logger_list *android_logger_list_open(log_id_t id, |
| 608 | int mode, |
| 609 | unsigned int tail, |
| 610 | pid_t pid) |
| 611 | { |
| 612 | struct logger_list *logger_list = android_logger_list_alloc(mode, tail, pid); |
| 613 | if (!logger_list) { |
| 614 | return NULL; |
| 615 | } |
| 616 | |
| 617 | if (!android_logger_open(logger_list, id)) { |
| 618 | android_logger_list_free(logger_list); |
| 619 | return NULL; |
| 620 | } |
| 621 | |
| 622 | return logger_list; |
| 623 | } |
| 624 | |
Mark Salyzyn | 6eef417 | 2014-12-15 09:51:39 -0800 | [diff] [blame] | 625 | static int android_logger_list_read_pstore(struct logger_list *logger_list, |
| 626 | struct log_msg *log_msg) |
| 627 | { |
| 628 | ssize_t ret; |
| 629 | off_t current, next; |
| 630 | uid_t uid; |
| 631 | struct logger *logger; |
| 632 | struct __attribute__((__packed__)) { |
| 633 | android_pmsg_log_header_t p; |
| 634 | android_log_header_t l; |
| 635 | } buf; |
| 636 | static uint8_t preread_count; |
| 637 | |
| 638 | memset(log_msg, 0, sizeof(*log_msg)); |
| 639 | |
| 640 | if (logger_list->sock < 0) { |
| 641 | int fd = open("/sys/fs/pstore/pmsg-ramoops-0", O_RDONLY); |
| 642 | |
| 643 | if (fd < 0) { |
| 644 | return -errno; |
| 645 | } |
| 646 | logger_list->sock = fd; |
| 647 | preread_count = 0; |
| 648 | } |
| 649 | |
| 650 | ret = 0; |
| 651 | while(1) { |
| 652 | if (preread_count < sizeof(buf)) { |
| 653 | ret = TEMP_FAILURE_RETRY(read(logger_list->sock, |
| 654 | &buf.p.magic + preread_count, |
| 655 | sizeof(buf) - preread_count)); |
| 656 | if (ret < 0) { |
| 657 | return -errno; |
| 658 | } |
| 659 | preread_count += ret; |
| 660 | } |
| 661 | if (preread_count != sizeof(buf)) { |
| 662 | return preread_count ? -EIO : -EAGAIN; |
| 663 | } |
| 664 | if ((buf.p.magic != LOGGER_MAGIC) |
| 665 | || (buf.p.len <= sizeof(buf)) |
| 666 | || (buf.p.len > (sizeof(buf) + LOGGER_ENTRY_MAX_PAYLOAD)) |
| 667 | || (buf.l.id >= LOG_ID_MAX) |
| 668 | || (buf.l.realtime.tv_nsec >= NS_PER_SEC)) { |
| 669 | do { |
| 670 | memmove(&buf.p.magic, &buf.p.magic + 1, --preread_count); |
| 671 | } while (preread_count && (buf.p.magic != LOGGER_MAGIC)); |
| 672 | continue; |
| 673 | } |
| 674 | preread_count = 0; |
| 675 | |
| 676 | logger_for_each(logger, logger_list) { |
| 677 | if (buf.l.id != logger->id) { |
| 678 | continue; |
| 679 | } |
| 680 | |
| 681 | if ((logger_list->start.tv_sec || logger_list->start.tv_nsec) |
| 682 | && ((logger_list->start.tv_sec > buf.l.realtime.tv_sec) |
| 683 | || ((logger_list->start.tv_sec == buf.l.realtime.tv_sec) |
| 684 | && (logger_list->start.tv_nsec > buf.l.realtime.tv_nsec)))) { |
| 685 | break; |
| 686 | } |
| 687 | |
| 688 | if (logger_list->pid && (logger_list->pid != buf.p.pid)) { |
| 689 | break; |
| 690 | } |
| 691 | |
| 692 | uid = get_best_effective_uid(); |
| 693 | if (!uid_has_log_permission(uid) && (uid != buf.p.uid)) { |
| 694 | break; |
| 695 | } |
| 696 | |
| 697 | ret = TEMP_FAILURE_RETRY(read(logger_list->sock, |
| 698 | log_msg->entry_v3.msg, |
| 699 | buf.p.len - sizeof(buf))); |
| 700 | if (ret < 0) { |
| 701 | return -errno; |
| 702 | } |
| 703 | if (ret != (ssize_t)(buf.p.len - sizeof(buf))) { |
| 704 | return -EIO; |
| 705 | } |
| 706 | |
| 707 | log_msg->entry_v3.len = buf.p.len - sizeof(buf); |
| 708 | log_msg->entry_v3.hdr_size = sizeof(log_msg->entry_v3); |
| 709 | log_msg->entry_v3.pid = buf.p.pid; |
| 710 | log_msg->entry_v3.tid = buf.l.tid; |
| 711 | log_msg->entry_v3.sec = buf.l.realtime.tv_sec; |
| 712 | log_msg->entry_v3.nsec = buf.l.realtime.tv_nsec; |
| 713 | log_msg->entry_v3.lid = buf.l.id; |
| 714 | |
| 715 | return ret; |
| 716 | } |
| 717 | |
| 718 | current = TEMP_FAILURE_RETRY(lseek(logger_list->sock, |
| 719 | (off_t)0, SEEK_CUR)); |
| 720 | if (current < 0) { |
| 721 | return -errno; |
| 722 | } |
| 723 | next = TEMP_FAILURE_RETRY(lseek(logger_list->sock, |
| 724 | (off_t)(buf.p.len - sizeof(buf)), |
| 725 | SEEK_CUR)); |
| 726 | if (next < 0) { |
| 727 | return -errno; |
| 728 | } |
| 729 | if ((next - current) != (ssize_t)(buf.p.len - sizeof(buf))) { |
| 730 | return -EIO; |
| 731 | } |
| 732 | } |
| 733 | } |
| 734 | |
Mark Salyzyn | a04464a | 2014-04-30 08:50:53 -0700 | [diff] [blame] | 735 | static void caught_signal(int signum __unused) |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 736 | { |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 737 | } |
| 738 | |
| 739 | /* Read from the selected logs */ |
| 740 | int android_logger_list_read(struct logger_list *logger_list, |
| 741 | struct log_msg *log_msg) |
| 742 | { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 743 | int ret, e; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 744 | struct logger *logger; |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 745 | struct sigaction ignore; |
| 746 | struct sigaction old_sigaction; |
| 747 | unsigned int old_alarm = 0; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 748 | |
| 749 | if (!logger_list) { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 750 | return -EINVAL; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 751 | } |
| 752 | |
Mark Salyzyn | 6eef417 | 2014-12-15 09:51:39 -0800 | [diff] [blame] | 753 | if (logger_list->mode & ANDROID_LOG_PSTORE) { |
| 754 | return android_logger_list_read_pstore(logger_list, log_msg); |
| 755 | } |
| 756 | |
Mark Salyzyn | 2d3f38a | 2015-01-26 10:46:44 -0800 | [diff] [blame] | 757 | if (logger_list->mode & ANDROID_LOG_NONBLOCK) { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 758 | memset(&ignore, 0, sizeof(ignore)); |
| 759 | ignore.sa_handler = caught_signal; |
| 760 | sigemptyset(&ignore.sa_mask); |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 761 | } |
| 762 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 763 | if (logger_list->sock < 0) { |
| 764 | char buffer[256], *cp, c; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 765 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 766 | int sock = socket_local_client("logdr", |
| 767 | ANDROID_SOCKET_NAMESPACE_RESERVED, |
| 768 | SOCK_SEQPACKET); |
| 769 | if (sock < 0) { |
| 770 | if ((sock == -1) && errno) { |
| 771 | return -errno; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 772 | } |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 773 | return sock; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 774 | } |
| 775 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 776 | strcpy(buffer, |
Mark Salyzyn | 2d3f38a | 2015-01-26 10:46:44 -0800 | [diff] [blame] | 777 | (logger_list->mode & ANDROID_LOG_NONBLOCK) ? "dumpAndClose" : "stream"); |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 778 | cp = buffer + strlen(buffer); |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 779 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 780 | strcpy(cp, " lids"); |
| 781 | cp += 5; |
| 782 | c = '='; |
| 783 | int remaining = sizeof(buffer) - (cp - buffer); |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 784 | logger_for_each(logger, logger_list) { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 785 | ret = snprintf(cp, remaining, "%c%u", c, logger->id); |
| 786 | ret = min(ret, remaining); |
| 787 | remaining -= ret; |
| 788 | cp += ret; |
| 789 | c = ','; |
| 790 | } |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 791 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 792 | if (logger_list->tail) { |
| 793 | ret = snprintf(cp, remaining, " tail=%u", logger_list->tail); |
| 794 | ret = min(ret, remaining); |
| 795 | remaining -= ret; |
| 796 | cp += ret; |
| 797 | } |
| 798 | |
Mark Salyzyn | fa3716b | 2014-02-14 16:05:05 -0800 | [diff] [blame] | 799 | if (logger_list->start.tv_sec || logger_list->start.tv_nsec) { |
| 800 | ret = snprintf(cp, remaining, " start=%" PRIu32 ".%09" PRIu32, |
| 801 | logger_list->start.tv_sec, |
| 802 | logger_list->start.tv_nsec); |
| 803 | ret = min(ret, remaining); |
| 804 | remaining -= ret; |
| 805 | cp += ret; |
| 806 | } |
| 807 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 808 | if (logger_list->pid) { |
| 809 | ret = snprintf(cp, remaining, " pid=%u", logger_list->pid); |
| 810 | ret = min(ret, remaining); |
| 811 | remaining -= ret; |
| 812 | cp += ret; |
| 813 | } |
| 814 | |
Mark Salyzyn | 2d3f38a | 2015-01-26 10:46:44 -0800 | [diff] [blame] | 815 | if (logger_list->mode & ANDROID_LOG_NONBLOCK) { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 816 | /* Deal with an unresponsive logd */ |
| 817 | sigaction(SIGALRM, &ignore, &old_sigaction); |
| 818 | old_alarm = alarm(30); |
| 819 | } |
| 820 | ret = write(sock, buffer, cp - buffer); |
| 821 | e = errno; |
Mark Salyzyn | 2d3f38a | 2015-01-26 10:46:44 -0800 | [diff] [blame] | 822 | if (logger_list->mode & ANDROID_LOG_NONBLOCK) { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 823 | if (e == EINTR) { |
| 824 | e = ETIMEDOUT; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 825 | } |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 826 | alarm(old_alarm); |
| 827 | sigaction(SIGALRM, &old_sigaction, NULL); |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 828 | } |
| 829 | |
| 830 | if (ret <= 0) { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 831 | close(sock); |
| 832 | if ((ret == -1) && e) { |
| 833 | return -e; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 834 | } |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 835 | if (ret == 0) { |
| 836 | return -EIO; |
| 837 | } |
| 838 | return ret; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 839 | } |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 840 | |
| 841 | logger_list->sock = sock; |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 842 | } |
| 843 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 844 | ret = 0; |
| 845 | while(1) { |
| 846 | memset(log_msg, 0, sizeof(*log_msg)); |
| 847 | |
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 | /* particularily useful if tombstone is reporting for logd */ |
| 850 | sigaction(SIGALRM, &ignore, &old_sigaction); |
| 851 | old_alarm = alarm(30); |
| 852 | } |
| 853 | /* NOTE: SOCK_SEQPACKET guarantees we read exactly one full entry */ |
| 854 | ret = recv(logger_list->sock, log_msg, LOGGER_ENTRY_MAX_LEN, 0); |
| 855 | e = errno; |
Mark Salyzyn | 2d3f38a | 2015-01-26 10:46:44 -0800 | [diff] [blame] | 856 | if (logger_list->mode & ANDROID_LOG_NONBLOCK) { |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 857 | if ((ret == 0) || (e == EINTR)) { |
| 858 | e = EAGAIN; |
| 859 | ret = -1; |
| 860 | } |
| 861 | alarm(old_alarm); |
| 862 | sigaction(SIGALRM, &old_sigaction, NULL); |
| 863 | } |
| 864 | |
| 865 | if (ret <= 0) { |
| 866 | if ((ret == -1) && e) { |
| 867 | return -e; |
| 868 | } |
| 869 | return ret; |
| 870 | } |
| 871 | |
| 872 | logger_for_each(logger, logger_list) { |
| 873 | if (log_msg->entry.lid == logger->id) { |
| 874 | return ret; |
| 875 | } |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 876 | } |
| 877 | } |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 878 | /* NOTREACH */ |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 879 | return ret; |
| 880 | } |
| 881 | |
| 882 | /* Close all the logs */ |
| 883 | void android_logger_list_free(struct logger_list *logger_list) |
| 884 | { |
| 885 | if (logger_list == NULL) { |
| 886 | return; |
| 887 | } |
| 888 | |
| 889 | while (!list_empty(&logger_list->node)) { |
| 890 | struct listnode *node = list_head(&logger_list->node); |
| 891 | struct logger *logger = node_to_item(node, struct logger, node); |
| 892 | android_logger_free(logger); |
| 893 | } |
| 894 | |
Mark Salyzyn | 154f460 | 2014-02-20 14:59:07 -0800 | [diff] [blame] | 895 | if (logger_list->sock >= 0) { |
| 896 | close (logger_list->sock); |
| 897 | } |
| 898 | |
Mark Salyzyn | 4295841 | 2013-11-22 10:50:27 -0800 | [diff] [blame] | 899 | free(logger_list); |
| 900 | } |