c754792a07
Clean up leaky file descriptors in uncrypt/uncrypt.cpp. Add unique_fd for open() and unique_file for fopen() to close FDs on destruction. Bug: 21496020 Change-Id: I0174db0de9d5f59cd43b44757b8ef0f5912c91a2
73 lines
1.5 KiB
C++
73 lines
1.5 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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#ifndef UNIQUE_FD_H
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#define UNIQUE_FD_H
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#include <stdio.h>
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#include <memory>
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class unique_fd {
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public:
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unique_fd(int fd) : fd_(fd) { }
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unique_fd(unique_fd&& uf) {
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fd_ = uf.fd_;
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uf.fd_ = -1;
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}
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~unique_fd() {
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if (fd_ != -1) {
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close(fd_);
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}
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}
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int get() {
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return fd_;
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}
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// Movable.
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unique_fd& operator=(unique_fd&& uf) {
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fd_ = uf.fd_;
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uf.fd_ = -1;
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return *this;
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}
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explicit operator bool() const {
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return fd_ != -1;
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}
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private:
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int fd_;
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// Non-copyable.
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unique_fd(const unique_fd&) = delete;
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unique_fd& operator=(const unique_fd&) = delete;
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};
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// Custom deleter for unique_file to avoid fclose(NULL).
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struct safe_fclose {
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void operator()(FILE *fp) const {
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if (fp) {
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fclose(fp);
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};
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}
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};
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using unique_file = std::unique_ptr<FILE, safe_fclose>;
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#endif // UNIQUE_FD_H
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