/usr/include/bcc/file_desc.h is in libbpfcc-dev 0.5.0-5ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 | /*
* Copyright (c) 2017 Facebook, Inc.
*
* 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.
*/
#pragma once
#include <unistd.h>
namespace ebpf {
/// FileDesc is a helper class for managing open file descriptors. Copy is
/// disallowed (call dup instead), and cleanup happens automatically.
class FileDesc {
public:
explicit FileDesc(int fd = -1) : fd_(fd) {}
FileDesc(FileDesc &&that) : fd_(-1) { *this = std::move(that); }
FileDesc(const FileDesc &that) = delete;
~FileDesc() {
if (fd_ >= 0)
::close(fd_);
}
FileDesc &operator=(int fd) {
if (fd_ >= 0)
::close(fd_);
fd_ = fd;
return *this;
}
FileDesc &operator=(FileDesc &&that) {
if (fd_ >= 0)
::close(fd_);
fd_ = that.fd_;
that.fd_ = -1;
return *this;
}
FileDesc &operator=(const FileDesc &that) = delete;
FileDesc dup() const {
int dup_fd = ::dup(fd_);
return FileDesc(dup_fd);
}
operator int() { return fd_; }
operator int() const { return fd_; }
private:
int fd_;
};
} // namespace ebpf
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