8bb8fcfb4f
Much nicer C++ style logging, but the main reason is to clean up AutoCloseFD.h so I don't have to use cutils to use it. Change-Id: I7a7f227508418046eecce6c89f813bd8854f448a
50 lines
1.6 KiB
C++
50 lines
1.6 KiB
C++
/*
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* Copyright (C) 2015 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 <string>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <android-base/logging.h>
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// File descriptor which is automatically closed when this object is destroyed.
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// Cannot be copied, since that would cause double-closes.
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class AutoCloseFD {
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public:
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AutoCloseFD(const char *path, int flags = O_RDONLY, int mode = 0):
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fd{TEMP_FAILURE_RETRY(open(path, flags | O_CLOEXEC, mode))} {}
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AutoCloseFD(const std::string &path, int flags = O_RDONLY, int mode = 0):
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AutoCloseFD(path.c_str(), flags, mode) {}
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~AutoCloseFD() {
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if (fd != -1) {
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int preserve_errno = errno;
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if (close(fd) == -1) {
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PLOG(ERROR) << "close(2) failed";
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};
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errno = preserve_errno;
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}
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}
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AutoCloseFD(const AutoCloseFD&) = delete;
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AutoCloseFD& operator=(const AutoCloseFD&) = delete;
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explicit operator bool() {return fd != -1;}
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int get() const {return fd;}
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private:
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const int fd;
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};
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