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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/Vector.h>
#include <LibCore/DirIterator.h>
#include <errno.h>
namespace Core {
DirIterator::DirIterator(const StringView& path, Flags flags)
: m_path(path)
, m_flags(flags)
{
m_dir = opendir(path.to_string().characters());
if (!m_dir) {
m_error = errno;
}
}
DirIterator::~DirIterator()
{
if (m_dir) {
closedir(m_dir);
m_dir = nullptr;
}
}
bool DirIterator::advance_next()
{
if (!m_dir)
return false;
while (true) {
errno = 0;
auto* de = readdir(m_dir);
if (!de) {
m_error = errno;
m_next = String();
return false;
}
m_next = de->d_name;
if (m_next.is_null())
return false;
if (m_flags & Flags::SkipDots && m_next.starts_with('.'))
continue;
if (m_flags & Flags::SkipParentAndBaseDir && (m_next == "." || m_next == ".."))
continue;
return !m_next.is_empty();
}
}
bool DirIterator::has_next()
{
if (!m_next.is_null())
return true;
return advance_next();
}
String DirIterator::next_path()
{
if (m_next.is_null())
advance_next();
auto tmp = m_next;
m_next = String();
return tmp;
}
String DirIterator::next_full_path()
{
return String::formatted("{}/{}", m_path, next_path());
}
String find_executable_in_path(String filename)
{
if (filename.starts_with('/')) {
if (access(filename.characters(), X_OK) == 0)
return filename;
return {};
}
for (auto directory : String { getenv("PATH") }.split(':')) {
auto fullpath = String::formatted("{}/{}", directory, filename);
if (access(fullpath.characters(), X_OK) == 0)
return fullpath;
}
return {};
}
}
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