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/*
* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "DevicesModel.h"
#include <AK/JsonArray.h>
#include <AK/JsonObject.h>
#include <AK/JsonValue.h>
#include <LibCore/DirIterator.h>
#include <LibCore/File.h>
#include <sys/stat.h>
NonnullRefPtr<DevicesModel> DevicesModel::create()
{
return adopt_ref(*new DevicesModel);
}
DevicesModel::DevicesModel()
{
}
DevicesModel::~DevicesModel()
{
}
int DevicesModel::row_count(const GUI::ModelIndex&) const
{
return m_devices.size();
}
int DevicesModel::column_count(const GUI::ModelIndex&) const
{
return Column::__Count;
}
String DevicesModel::column_name(int column) const
{
switch (column) {
case Column::Device:
return "Device";
case Column::Major:
return "Major";
case Column::Minor:
return "Minor";
case Column::ClassName:
return "Class";
case Column::Type:
return "Type";
default:
VERIFY_NOT_REACHED();
}
}
GUI::Variant DevicesModel::data(const GUI::ModelIndex& index, GUI::ModelRole role) const
{
VERIFY(is_valid(index));
if (role == GUI::ModelRole::TextAlignment) {
switch (index.column()) {
case Column::Device:
return Gfx::TextAlignment::CenterLeft;
case Column::Major:
return Gfx::TextAlignment::CenterRight;
case Column::Minor:
return Gfx::TextAlignment::CenterRight;
case Column::ClassName:
return Gfx::TextAlignment::CenterLeft;
case Column::Type:
return Gfx::TextAlignment::CenterLeft;
}
return {};
}
if (role == GUI::ModelRole::Sort) {
const DeviceInfo& device = m_devices[index.row()];
switch (index.column()) {
case Column::Device:
return device.path;
case Column::Major:
return device.major;
case Column::Minor:
return device.minor;
case Column::ClassName:
return device.class_name;
case Column::Type:
return device.type;
default:
VERIFY_NOT_REACHED();
}
}
if (role == GUI::ModelRole::Display) {
const DeviceInfo& device = m_devices[index.row()];
switch (index.column()) {
case Column::Device:
return device.path;
case Column::Major:
return device.major;
case Column::Minor:
return device.minor;
case Column::ClassName:
return device.class_name;
case Column::Type:
switch (device.type) {
case DeviceInfo::Type::Block:
return "Block";
case DeviceInfo::Type::Character:
return "Character";
default:
VERIFY_NOT_REACHED();
}
default:
VERIFY_NOT_REACHED();
}
}
return {};
}
void DevicesModel::update()
{
auto proc_devices = Core::File::construct("/proc/devices");
if (!proc_devices->open(Core::IODevice::OpenMode::ReadOnly))
VERIFY_NOT_REACHED();
auto json = JsonValue::from_string(proc_devices->read_all());
VERIFY(json.has_value());
m_devices.clear();
json.value().as_array().for_each([this](auto& value) {
JsonObject device = value.as_object();
DeviceInfo device_info;
device_info.major = device.get("major").to_uint();
device_info.minor = device.get("minor").to_uint();
device_info.class_name = device.get("class_name").to_string();
String type_str = device.get("type").to_string();
if (type_str == "block")
device_info.type = DeviceInfo::Type::Block;
else if (type_str == "character")
device_info.type = DeviceInfo::Type::Character;
else
VERIFY_NOT_REACHED();
m_devices.append(move(device_info));
});
auto fill_in_paths_from_dir = [this](const String& dir) {
Core::DirIterator dir_iter { dir, Core::DirIterator::Flags::SkipDots };
while (dir_iter.has_next()) {
auto path = dir_iter.next_full_path();
struct stat statbuf;
if (lstat(path.characters(), &statbuf) != 0) {
VERIFY_NOT_REACHED();
}
if (!S_ISBLK(statbuf.st_mode) && !S_ISCHR(statbuf.st_mode))
continue;
unsigned _major = major(statbuf.st_rdev);
unsigned _minor = minor(statbuf.st_rdev);
auto it = m_devices.find_if([_major, _minor](const auto& device_info) {
return device_info.major == _major && device_info.minor == _minor;
});
if (it != m_devices.end()) {
(*it).path = move(path);
}
}
};
fill_in_paths_from_dir("/dev");
fill_in_paths_from_dir("/dev/pts");
did_update();
}
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