mirror of
https://github.com/RGBCube/serenity
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122 lines
3.2 KiB
C++
122 lines
3.2 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 <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(const StringView& path, Flags flags)
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: m_path(path)
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, m_flags(flags)
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{
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m_dir = opendir(path.to_string().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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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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return String::formatted("{}/{}", m_path, next_path());
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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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}
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