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84 lines
2.5 KiB
84 lines
2.5 KiB
/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <signal.h>
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#include <gflags/gflags.h>
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#include <android-base/logging.h>
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#include "common/libs/fs/shared_buf.h"
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#include "common/libs/fs/shared_fd.h"
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#include "host/libs/config/cuttlefish_config.h"
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#include "host/libs/config/logging.h"
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DEFINE_int32(log_pipe_fd, -1,
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"A file descriptor representing a (UNIX) socket from which to "
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"read the logs. If -1 is given the socket is created according to "
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"the instance configuration");
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int main(int argc, char** argv) {
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cuttlefish::DefaultSubprocessLogging(argv);
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google::ParseCommandLineFlags(&argc, &argv, true);
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auto config = cuttlefish::CuttlefishConfig::Get();
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CHECK(config) << "Could not open cuttlefish config";
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auto instance = config->ForDefaultInstance();
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// Disable default handling of SIGPIPE
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struct sigaction new_action {
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}, old_action{};
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new_action.sa_handler = SIG_IGN;
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sigaction(SIGPIPE, &new_action, &old_action);
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cuttlefish::SharedFD pipe;
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if (FLAGS_log_pipe_fd < 0) {
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auto log_name = instance.logcat_pipe_name();
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pipe = cuttlefish::SharedFD::Open(log_name.c_str(), O_RDONLY);
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} else {
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pipe = cuttlefish::SharedFD::Dup(FLAGS_log_pipe_fd);
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close(FLAGS_log_pipe_fd);
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}
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if (!pipe->IsOpen()) {
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LOG(ERROR) << "Error opening log pipe: " << pipe->StrError();
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return 2;
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}
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auto path = instance.logcat_path();
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auto logcat_file =
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cuttlefish::SharedFD::Open(path.c_str(), O_CREAT | O_APPEND | O_WRONLY, 0666);
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// Server loop
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while (true) {
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char buff[1024];
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auto read = pipe->Read(buff, sizeof(buff));
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if (read < 0) {
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LOG(ERROR) << "Could not read logcat: " << pipe->StrError();
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break;
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}
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auto written = cuttlefish::WriteAll(logcat_file, buff, read);
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CHECK(written == read)
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<< "Error writing to log file: " << logcat_file->StrError()
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<< ". This is unrecoverable.";
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}
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logcat_file->Close();
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pipe->Close();
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return 0;
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}
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