104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
/*
|
|
* Copyright (C) 2007-2016 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
|
|
#include <log/log.h>
|
|
|
|
#include "config_write.h"
|
|
#include "fake_log_device.h"
|
|
#include "log_portability.h"
|
|
#include "logger.h"
|
|
|
|
static int fakeOpen();
|
|
static void fakeClose();
|
|
static int fakeWrite(log_id_t log_id, struct timespec* ts, struct iovec* vec,
|
|
size_t nr);
|
|
|
|
static int logFds[(int)LOG_ID_MAX] = { -1, -1, -1, -1, -1, -1 };
|
|
|
|
LIBLOG_HIDDEN struct android_log_transport_write fakeLoggerWrite = {
|
|
.node = { &fakeLoggerWrite.node, &fakeLoggerWrite.node },
|
|
.context.priv = &logFds,
|
|
.name = "fake",
|
|
.available = NULL,
|
|
.open = fakeOpen,
|
|
.close = fakeClose,
|
|
.write = fakeWrite,
|
|
};
|
|
|
|
static int fakeOpen() {
|
|
int i;
|
|
|
|
for (i = 0; i < LOG_ID_MAX; i++) {
|
|
/*
|
|
* Known maximum size string, plus an 8 character margin to deal with
|
|
* possible independent changes to android_log_id_to_name().
|
|
*/
|
|
char buf[sizeof("/dev/log_security") + 8];
|
|
if (logFds[i] >= 0) {
|
|
continue;
|
|
}
|
|
snprintf(buf, sizeof(buf), "/dev/log_%s", android_log_id_to_name(i));
|
|
logFds[i] = fakeLogOpen(buf, O_WRONLY);
|
|
if (logFds[i] < 0) {
|
|
fprintf(stderr, "fakeLogOpen(%s, O_WRONLY) failed\n", buf);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void fakeClose() {
|
|
int i;
|
|
|
|
for (i = 0; i < LOG_ID_MAX; i++) {
|
|
fakeLogClose(logFds[i]);
|
|
logFds[i] = -1;
|
|
}
|
|
}
|
|
|
|
static int fakeWrite(log_id_t log_id, struct timespec* ts __unused,
|
|
struct iovec* vec, size_t nr) {
|
|
ssize_t ret;
|
|
size_t i;
|
|
int logFd, len;
|
|
|
|
if (/*(int)log_id >= 0 &&*/ (int)log_id >= (int)LOG_ID_MAX) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
len = 0;
|
|
for (i = 0; i < nr; ++i) {
|
|
len += vec[i].iov_len;
|
|
}
|
|
|
|
if (len > LOGGER_ENTRY_MAX_PAYLOAD) {
|
|
len = LOGGER_ENTRY_MAX_PAYLOAD;
|
|
}
|
|
|
|
logFd = logFds[(int)log_id];
|
|
ret = TEMP_FAILURE_RETRY(fakeLogWritev(logFd, vec, nr));
|
|
if (ret < 0) {
|
|
ret = -errno;
|
|
} else if (ret > len) {
|
|
ret = len;
|
|
}
|
|
|
|
return ret;
|
|
}
|