Mark Salyzyn | facf94c | 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 <fcntl.h> |
| 19 | #include <unistd.h> |
| 20 | |
Mark Salyzyn | cfd5b08 | 2016-10-17 14:28:00 -0700 | [diff] [blame] | 21 | #include <log/log.h> |
Mark Salyzyn | facf94c | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 22 | |
| 23 | #include "config_write.h" |
| 24 | #include "fake_log_device.h" |
| 25 | #include "log_portability.h" |
| 26 | #include "logger.h" |
| 27 | |
| 28 | static int fakeOpen(); |
| 29 | static void fakeClose(); |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 30 | static int fakeWrite(log_id_t log_id, struct timespec* ts, struct iovec* vec, |
| 31 | size_t nr); |
Mark Salyzyn | facf94c | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 32 | |
| 33 | static int logFds[(int)LOG_ID_MAX] = { -1, -1, -1, -1, -1, -1 }; |
| 34 | |
| 35 | LIBLOG_HIDDEN struct android_log_transport_write fakeLoggerWrite = { |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 36 | .node = { &fakeLoggerWrite.node, &fakeLoggerWrite.node }, |
Mark Salyzyn | 04bbc8e | 2017-03-08 15:03:20 -0800 | [diff] [blame] | 37 | .context.priv = &logFds, |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 38 | .name = "fake", |
| 39 | .available = NULL, |
| 40 | .open = fakeOpen, |
| 41 | .close = fakeClose, |
| 42 | .write = fakeWrite, |
Mark Salyzyn | facf94c | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 43 | }; |
| 44 | |
| 45 | static int fakeOpen() { |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 46 | int i; |
Mark Salyzyn | facf94c | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 47 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 48 | for (i = 0; i < LOG_ID_MAX; i++) { |
| 49 | /* |
| 50 | * Known maximum size string, plus an 8 character margin to deal with |
| 51 | * possible independent changes to android_log_id_to_name(). |
| 52 | */ |
| 53 | char buf[sizeof("/dev/log_security") + 8]; |
| 54 | if (logFds[i] >= 0) { |
| 55 | continue; |
Mark Salyzyn | facf94c | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 56 | } |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 57 | snprintf(buf, sizeof(buf), "/dev/log_%s", android_log_id_to_name(i)); |
Dan Willemsen | f3452d8 | 2017-05-07 12:17:15 -0700 | [diff] [blame] | 58 | logFds[i] = fakeLogOpen(buf); |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 59 | if (logFds[i] < 0) { |
Dan Willemsen | f3452d8 | 2017-05-07 12:17:15 -0700 | [diff] [blame] | 60 | fprintf(stderr, "fakeLogOpen(%s) failed\n", buf); |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 61 | } |
| 62 | } |
| 63 | return 0; |
Mark Salyzyn | facf94c | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 64 | } |
| 65 | |
| 66 | static void fakeClose() { |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 67 | int i; |
Mark Salyzyn | facf94c | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 68 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 69 | for (i = 0; i < LOG_ID_MAX; i++) { |
| 70 | fakeLogClose(logFds[i]); |
| 71 | logFds[i] = -1; |
| 72 | } |
Mark Salyzyn | facf94c | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 73 | } |
| 74 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 75 | static int fakeWrite(log_id_t log_id, struct timespec* ts __unused, |
| 76 | struct iovec* vec, size_t nr) { |
| 77 | ssize_t ret; |
| 78 | size_t i; |
| 79 | int logFd, len; |
Mark Salyzyn | facf94c | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 80 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 81 | if (/*(int)log_id >= 0 &&*/ (int)log_id >= (int)LOG_ID_MAX) { |
| 82 | return -EINVAL; |
| 83 | } |
Mark Salyzyn | 62d0d2d | 2016-03-08 16:18:26 -0800 | [diff] [blame] | 84 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 85 | len = 0; |
| 86 | for (i = 0; i < nr; ++i) { |
| 87 | len += vec[i].iov_len; |
| 88 | } |
Mark Salyzyn | 62d0d2d | 2016-03-08 16:18:26 -0800 | [diff] [blame] | 89 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 90 | if (len > LOGGER_ENTRY_MAX_PAYLOAD) { |
| 91 | len = LOGGER_ENTRY_MAX_PAYLOAD; |
| 92 | } |
Mark Salyzyn | facf94c | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 93 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 94 | logFd = logFds[(int)log_id]; |
| 95 | ret = TEMP_FAILURE_RETRY(fakeLogWritev(logFd, vec, nr)); |
| 96 | if (ret < 0) { |
| 97 | ret = -errno; |
| 98 | } else if (ret > len) { |
| 99 | ret = len; |
| 100 | } |
Mark Salyzyn | facf94c | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 101 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 102 | return ret; |
Mark Salyzyn | facf94c | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 103 | } |