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lsusb.cpp
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/*
* Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/ByteBuffer.h>
#include <AK/FixedArray.h>
#include <AK/JsonArray.h>
#include <AK/JsonObject.h>
#include <AK/LexicalPath.h>
#include <AK/String.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/DirIterator.h>
#include <LibCore/File.h>
#include <LibCore/System.h>
#include <LibMain/Main.h>
#include <LibUSBDB/Database.h>
#include <stdio.h>
#include <unistd.h>
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
TRY(Core::System::pledge("stdio rpath"));
TRY(Core::System::unveil("/sys/bus/usb", "r"));
TRY(Core::System::unveil("/res/usb.ids", "r"));
TRY(Core::System::unveil(nullptr, nullptr));
bool print_verbose;
Core::ArgsParser args;
args.set_general_help("List USB devices.");
args.add_option(print_verbose, "Print all device descriptors", "verbose", 'v');
args.parse(arguments);
Core::DirIterator usb_devices("/sys/bus/usb", Core::DirIterator::SkipDots);
RefPtr<USBDB::Database> usb_db = USBDB::Database::open();
if (!usb_db) {
warnln("Failed to open usb.ids");
}
while (usb_devices.has_next()) {
auto full_path = LexicalPath(usb_devices.next_full_path());
auto proc_usb_device = Core::File::construct(full_path.string());
if (!proc_usb_device->open(Core::OpenMode::ReadOnly)) {
warnln("Failed to open {}: {}", proc_usb_device->name(), proc_usb_device->error_string());
continue;
}
auto contents = proc_usb_device->read_all();
auto json_or_error = JsonValue::from_string(contents);
if (json_or_error.is_error()) {
warnln("Failed to decode JSON: {}", json_or_error.error());
continue;
}
auto json = json_or_error.release_value();
json.as_array().for_each([usb_db, print_verbose](auto& value) {
auto& device_descriptor = value.as_object();
auto device_address = device_descriptor.get("device_address").to_u32();
auto vendor_id = device_descriptor.get("vendor_id").to_u32();
auto product_id = device_descriptor.get("product_id").to_u32();
StringView vendor_string = usb_db->get_vendor(vendor_id);
StringView device_string = usb_db->get_device(vendor_id, product_id);
if (device_string.is_empty())
device_string = "Unknown Device";
outln("Device {}: ID {:04x}:{:04x} {} {}", device_address, vendor_id, product_id, vendor_string, device_string);
if (print_verbose) {
outln("Device Descriptor");
outln(" bLength {}", device_descriptor.get("length").to_u32());
outln(" bDescriptorType {}", device_descriptor.get("descriptor_type").to_u32());
outln(" bcdUSB {}", device_descriptor.get("usb_spec_compliance_bcd").to_u32());
outln(" bDeviceClass {}", device_descriptor.get("device_class").to_u32());
outln(" bDeviceSubClass {}", device_descriptor.get("device_sub_class").to_u32());
outln(" bDeviceProtocol {}", device_descriptor.get("device_protocol").to_u32());
outln(" bMaxPacketSize {}", device_descriptor.get("max_packet_size").to_u32());
outln(" idVendor 0x{:04x} {}", device_descriptor.get("vendor_id").to_u32(), vendor_string);
outln(" idProduct 0x{:04x} {}", device_descriptor.get("product_id").to_u32(), device_string);
outln(" bcdDevice {}", device_descriptor.get("device_release_bcd").to_u32());
outln(" iManufacturer {}", device_descriptor.get("manufacturer_id_descriptor_index").to_u32());
outln(" iProduct {}", device_descriptor.get("product_string_descriptor_index").to_u32());
outln(" iSerial {}", device_descriptor.get("serial_number_descriptor_index").to_u32());
outln(" bNumConfigurations {}", device_descriptor.get("num_configurations").to_u32());
auto const& configuration_descriptors = value.as_object().get("configurations");
configuration_descriptors.as_array().for_each([&](auto& config_value) {
auto const& configuration_descriptor = config_value.as_object();
outln(" Configuration Descriptor:");
outln(" bLength {}", configuration_descriptor.get("length").as_u32());
outln(" bDescriptorType {}", configuration_descriptor.get("descriptor_type").as_u32());
outln(" wTotalLength {}", configuration_descriptor.get("total_length").as_u32());
outln(" bNumInterfaces {}", configuration_descriptor.get("number_of_interfaces").as_u32());
outln(" bmAttributes 0x{:02x}", configuration_descriptor.get("attributes_bitmap").as_u32());
outln(" MaxPower {}mA", configuration_descriptor.get("max_power").as_u32() * 2u);
auto const& interface_descriptors = config_value.as_object().get("interfaces");
interface_descriptors.as_array().for_each([&](auto& interface_value) {
auto const& interface_descriptor = interface_value.as_object();
auto const interface_class_code = interface_descriptor.get("interface_class_code").to_u32();
auto const interface_subclass_code = interface_descriptor.get("interface_sub_class_code").to_u32();
auto const interface_protocol_code = interface_descriptor.get("interface_protocol").to_u32();
auto const interface_class = usb_db->get_class(interface_class_code);
auto const interface_subclass = usb_db->get_subclass(interface_class_code, interface_subclass_code);
auto const interface_protocol = usb_db->get_protocol(interface_class_code, interface_subclass_code, interface_protocol_code);
outln(" Interface Descriptor:");
outln(" bLength {}", interface_descriptor.get("length").to_u32());
outln(" bDescriptorType {}", interface_descriptor.get("descriptor_type").to_u32());
outln(" bInterfaceNumber {}", interface_descriptor.get("interface_number").to_u32());
outln(" bAlternateSetting {}", interface_descriptor.get("alternate_setting").to_u32());
outln(" bNumEndpoints {}", interface_descriptor.get("num_endpoints").to_u32());
outln(" bInterfaceClass {} {}", interface_class_code, interface_class);
outln(" bInterfaceSubClass {} {}", interface_subclass_code, interface_subclass);
outln(" bInterfaceProtocol {} {}", interface_protocol_code, interface_protocol);
outln(" iInterface {}", interface_descriptor.get("interface_string_desc_index").to_u32());
auto const& endpoint_descriptors = interface_value.as_object().get("endpoints");
endpoint_descriptors.as_array().for_each([&](auto& endpoint_value) {
auto const& endpoint_descriptor = endpoint_value.as_object();
auto const endpoint_address = endpoint_descriptor.get("endpoint_address").to_u32();
outln(" Endpoint Descriptor:");
outln(" bLength {}", endpoint_descriptor.get("length").to_u32());
outln(" bDescriptorType {}", endpoint_descriptor.get("descriptor_type").to_u32());
outln(" bEndpointAddress 0x{:02x} EP {} {}", endpoint_address, (endpoint_address & 0xFu), ((endpoint_address & 0x80u) ? "IN" : "OUT"));
outln(" bmAttributes 0x{:02x}", endpoint_descriptor.get("attribute_bitmap").to_u32());
outln(" wMaxPacketSize 0x{:04x}", endpoint_descriptor.get("max_packet_size").to_u32());
outln(" bInterval {}", endpoint_descriptor.get("polling_interval").to_u32());
});
});
});
}
});
}
return 0;
}