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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Vector.h>
#include <LibCore/DirIterator.h>
#include <errno.h>
#include <unistd.h>
namespace Core {
DirIterator::DirIterator(String path, Flags flags)
: m_path(move(path))
, m_flags(flags)
{
m_dir = opendir(m_path.characters());
if (!m_dir) {
m_error = errno;
}
}
DirIterator::~DirIterator()
{
if (m_dir) {
closedir(m_dir);
m_dir = nullptr;
}
}
DirIterator::DirIterator(DirIterator&& other)
: m_dir(other.m_dir)
, m_error(other.m_error)
, m_next(move(other.m_next))
, m_path(move(other.m_path))
, m_flags(other.m_flags)
{
other.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()
{
StringBuilder builder;
builder.append(m_path);
if (!m_path.ends_with('/'))
builder.append('/');
builder.append(next_path());
return builder.to_string();
}
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 {};
}
int DirIterator::fd() const
{
if (!m_dir)
return -1;
return dirfd(m_dir);
}
}
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