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/*
* Copyright (C) 2019 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 <gflags/gflags.h>
#include <glog/logging.h>
#include "common/libs/fs/shared_fd.h"
#include "host/libs/config/cuttlefish_config.h"
DEFINE_int32(
server_fd, -1,
"File descriptor to an already created vsock server. If negative a new "
"server will be created at the port specified on the config file");
int main(int argc, char** argv) {
::android::base::InitLogging(argv, android::base::StderrLogger);
google::ParseCommandLineFlags(&argc, &argv, true);
auto config = vsoc::CuttlefishConfig::Get();
auto path = config->logcat_path();
auto logcat_file =
cvd::SharedFD::Open(path.c_str(), O_CREAT | O_APPEND | O_WRONLY, 0666);
CHECK(logcat_file->IsOpen())
<< "Unable to open logcat file: " << logcat_file->StrError();
cvd::SharedFD server_fd;
if (FLAGS_server_fd < 0) {
unsigned int port = config->logcat_vsock_port();
server_fd = cvd::SharedFD::VsockServer(port, SOCK_STREAM);
} else {
server_fd = cvd::SharedFD::Dup(FLAGS_server_fd);
close(FLAGS_server_fd);
}
CHECK(server_fd->IsOpen()) << "Error creating or inheriting logcat server: "
<< server_fd->StrError();
// Server loop
while (true) {
auto conn = cvd::SharedFD::Accept(*server_fd);
while (true) {
char buff[1024];
auto read = conn->Read(buff, sizeof(buff));
if (read <= 0) {
// Close here to ensure the other side gets reset if it's still
// connected
conn->Close();
LOG(WARNING) << "Detected close from the other side";
break;
}
auto written = logcat_file->Write(buff, read);
CHECK(written == read)
<< "Error writing to log file: " << logcat_file->StrError()
<< ". This is unrecoverable.";
}
}
return 0;
}
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