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133 lines
3.8 KiB
C++
133 lines
3.8 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <LibCore/File.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <sys/stat.h>
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#include <unistd.h>
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namespace Core {
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Result<NonnullRefPtr<File>, String> File::open(const String& filename, IODevice::OpenMode mode, mode_t permissions)
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{
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auto file = File::construct(filename);
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if (!file->open_impl(mode, permissions))
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return String(file->error_string());
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return file;
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}
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File::File(const StringView& filename, Object* parent)
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: IODevice(parent)
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, m_filename(filename)
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{
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}
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File::~File()
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{
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if (m_should_close_file_descriptor == ShouldCloseFileDescription::Yes && mode() != NotOpen)
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close();
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}
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bool File::open(int fd, IODevice::OpenMode mode, ShouldCloseFileDescription should_close)
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{
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set_fd(fd);
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set_mode(mode);
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m_should_close_file_descriptor = should_close;
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return true;
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}
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bool File::open(IODevice::OpenMode mode)
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{
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return open_impl(mode, 0666);
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}
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bool File::open_impl(IODevice::OpenMode mode, mode_t permissions)
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{
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ASSERT(!m_filename.is_null());
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int flags = 0;
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if ((mode & IODevice::ReadWrite) == IODevice::ReadWrite) {
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flags |= O_RDWR | O_CREAT;
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} else if (mode & IODevice::ReadOnly) {
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flags |= O_RDONLY;
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} else if (mode & IODevice::WriteOnly) {
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flags |= O_WRONLY | O_CREAT;
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bool should_truncate = !((mode & IODevice::Append) || (mode & IODevice::MustBeNew));
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if (should_truncate)
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flags |= O_TRUNC;
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}
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if (mode & IODevice::Append)
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flags |= O_APPEND;
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if (mode & IODevice::Truncate)
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flags |= O_TRUNC;
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if (mode & IODevice::MustBeNew)
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flags |= O_EXCL;
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int fd = ::open(m_filename.characters(), flags, permissions);
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if (fd < 0) {
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set_error(errno);
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return false;
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}
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set_fd(fd);
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set_mode(mode);
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return true;
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}
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bool File::is_directory() const
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{
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struct stat stat;
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if (fstat(fd(), &stat) < 0)
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return false;
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return S_ISDIR(stat.st_mode);
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}
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bool File::is_directory(const String& filename)
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{
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struct stat st;
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if (stat(filename.characters(), &st) < 0)
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return false;
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return S_ISDIR(st.st_mode);
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}
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bool File::exists(const String& filename)
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{
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struct stat st;
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return stat(filename.characters(), &st) == 0;
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}
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String File::real_path_for(const String& filename)
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{
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if (filename.is_null())
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return {};
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auto* path = realpath(filename.characters(), nullptr);
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String real_path(path);
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free(path);
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return real_path;
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}
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}
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