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
21 #include <log/log.h>
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();
30 static int fakeWrite(log_id_t log_id, struct timespec *ts,
31 struct iovec *vec, size_t nr);
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 = {
36 .node = { &fakeLoggerWrite.node, &fakeLoggerWrite.node },
37 .context.private = &logFds,
38 .name = "fake",
39 .available = NULL,
40 .open = fakeOpen,
41 .close = fakeClose,
42 .write = fakeWrite,
43 };
44
fakeOpen()45 static int fakeOpen() {
46 int i;
47
48 for (i = 0; i < LOG_ID_MAX; i++) {
49 char buf[sizeof("/dev/log_security")];
50 snprintf(buf, sizeof(buf), "/dev/log_%s", android_log_id_to_name(i));
51 logFds[i] = fakeLogOpen(buf, O_WRONLY);
52 }
53 return 0;
54 }
55
fakeClose()56 static void fakeClose() {
57 int i;
58
59 for (i = 0; i < LOG_ID_MAX; i++) {
60 fakeLogClose(logFds[i]);
61 logFds[i] = -1;
62 }
63 }
64
fakeWrite(log_id_t log_id,struct timespec * ts __unused,struct iovec * vec,size_t nr)65 static int fakeWrite(log_id_t log_id, struct timespec *ts __unused,
66 struct iovec *vec, size_t nr)
67 {
68 ssize_t ret;
69 int logFd;
70
71 if (/*(int)log_id >= 0 &&*/ (int)log_id >= (int)LOG_ID_MAX) {
72 return -EBADF;
73 }
74
75 logFd = logFds[(int)log_id];
76 ret = TEMP_FAILURE_RETRY(fakeLogWritev(logFd, vec, nr));
77 if (ret < 0) {
78 ret = -errno;
79 }
80
81 return ret;
82 }
83