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/*
* 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(static_cast<log_id_t>(i)));
logFds[i] = fakeLogOpen(buf);
if (logFds[i] < 0) {
fprintf(stderr, "fakeLogOpen(%s) 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*, 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;
}
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