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7f780e43a6
An explicit move constructor is required to null-out the moved-from directory descriptor. Otherwise, we would call closedir() twice when using ErrorOr<DirIterator>::release_value().
125 lines
2.3 KiB
C++
125 lines
2.3 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Vector.h>
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#include <LibCore/DirIterator.h>
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#include <errno.h>
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#include <unistd.h>
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namespace Core {
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DirIterator::DirIterator(String path, Flags flags)
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: m_path(move(path))
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, m_flags(flags)
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{
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m_dir = opendir(m_path.characters());
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if (!m_dir) {
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m_error = errno;
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}
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}
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DirIterator::~DirIterator()
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{
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if (m_dir) {
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closedir(m_dir);
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m_dir = nullptr;
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}
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}
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DirIterator::DirIterator(DirIterator&& other)
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: m_dir(other.m_dir)
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, m_error(other.m_error)
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, m_next(move(other.m_next))
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, m_path(move(other.m_path))
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, m_flags(other.m_flags)
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{
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other.m_dir = nullptr;
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}
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bool DirIterator::advance_next()
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{
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if (!m_dir)
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return false;
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while (true) {
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errno = 0;
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auto* de = readdir(m_dir);
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if (!de) {
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m_error = errno;
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m_next = String();
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return false;
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}
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m_next = de->d_name;
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if (m_next.is_null())
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return false;
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if (m_flags & Flags::SkipDots && m_next.starts_with('.'))
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continue;
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if (m_flags & Flags::SkipParentAndBaseDir && (m_next == "." || m_next == ".."))
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continue;
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return !m_next.is_empty();
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}
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}
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bool DirIterator::has_next()
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{
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if (!m_next.is_null())
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return true;
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return advance_next();
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}
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String DirIterator::next_path()
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{
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if (m_next.is_null())
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advance_next();
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auto tmp = m_next;
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m_next = String();
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return tmp;
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}
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String DirIterator::next_full_path()
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{
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StringBuilder builder;
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builder.append(m_path);
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if (!m_path.ends_with('/'))
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builder.append('/');
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builder.append(next_path());
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return builder.to_string();
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}
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String find_executable_in_path(String filename)
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{
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if (filename.starts_with('/')) {
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if (access(filename.characters(), X_OK) == 0)
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return filename;
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return {};
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}
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for (auto directory : String { getenv("PATH") }.split(':')) {
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auto fullpath = String::formatted("{}/{}", directory, filename);
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if (access(fullpath.characters(), X_OK) == 0)
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return fullpath;
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}
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return {};
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}
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int DirIterator::fd() const
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{
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if (!m_dir)
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return -1;
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return dirfd(m_dir);
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}
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}
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