2 * Copyright (C) 2015 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
19 #include <sys/types.h>
24 #include <android-base/logging.h>
26 // File descriptor which is automatically closed when this object is destroyed.
27 // Cannot be copied, since that would cause double-closes.
30 AutoCloseFD(const char *path, int flags = O_RDONLY, int mode = 0):
31 fd{TEMP_FAILURE_RETRY(open(path, flags | O_CLOEXEC, mode))} {}
32 AutoCloseFD(const std::string &path, int flags = O_RDONLY, int mode = 0):
33 AutoCloseFD(path.c_str(), flags, mode) {}
36 int preserve_errno = errno;
37 if (close(fd) == -1) {
38 PLOG(ERROR) << "close(2) failed";
40 errno = preserve_errno;
43 AutoCloseFD(const AutoCloseFD&) = delete;
44 AutoCloseFD& operator=(const AutoCloseFD&) = delete;
45 explicit operator bool() {return fd != -1;}
46 int get() const {return fd;}