ladybird/Userland/Utilities/lspci.cpp

/*
 * 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/ByteBuffer.h>
#include <AK/JsonArray.h>
#include <AK/JsonObject.h>
#include <AK/String.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <LibPCIDB/Database.h>
#include <stdio.h>

static bool flag_show_numerical = false;

static const char* format_numerical = "{:04x}:{:02x}:{:02x}.{} {}: {}:{} (rev {:02x})";
static const char* format_textual = "{:04x}:{:02x}:{:02x}.{} {}: {} {} (rev {:02x})";

int main(int argc, char** argv)
{
    if (pledge("stdio rpath", nullptr) < 0) {
        perror("pledge");
        return 1;
    }

    if (unveil("/res/pci.ids", "r") < 0) {
        perror("unveil");
        return 1;
    }

    if (unveil("/proc/pci", "r") < 0) {
        perror("unveil");
        return 1;
    }

    unveil(nullptr, nullptr);

    Core::ArgsParser args_parser;
    args_parser.set_general_help("List PCI devices.");
    args_parser.add_option(flag_show_numerical, "Show numerical IDs", "numerical", 'n');
    args_parser.parse(argc, argv);

    const char* format = flag_show_numerical ? format_numerical : format_textual;

    RefPtr<PCIDB::Database> db;
    if (!flag_show_numerical) {
        db = PCIDB::Database::open();
        if (!db) {
            warnln("Couldn't open PCI ID database");
            flag_show_numerical = true;
        }
    }

    auto proc_pci = Core::File::construct("/proc/pci");
    if (!proc_pci->open(Core::IODevice::ReadOnly)) {
        fprintf(stderr, "Error: %s\n", proc_pci->error_string());
        return 1;
    }

    if (pledge("stdio", nullptr) < 0) {
        perror("pledge");
        return 1;
    }

    auto file_contents = proc_pci->read_all();
    auto json = JsonValue::from_string(file_contents);
    VERIFY(json.has_value());
    json.value().as_array().for_each([db, format](auto& value) {
        auto dev = value.as_object();
        auto seg = dev.get("seg").to_u32();
        auto bus = dev.get("bus").to_u32();
        auto device = dev.get("device").to_u32();
        auto function = dev.get("function").to_u32();
        auto vendor_id = dev.get("vendor_id").to_u32();
        auto device_id = dev.get("device_id").to_u32();
        auto revision_id = dev.get("revision_id").to_u32();
        auto class_id = dev.get("class").to_u32();
        auto subclass_id = dev.get("subclass").to_u32();

        String vendor_name;
        String device_name;
        String class_name;

        if (db) {
            vendor_name = db->get_vendor(vendor_id);
            device_name = db->get_device(vendor_id, device_id);
            class_name = db->get_class(class_id);
        }

        if (vendor_name.is_empty())
            vendor_name = String::format("%04x", vendor_id);
        if (device_name.is_empty())
            device_name = String::format("%04x", device_id);
        if (class_name.is_empty())
            class_name = String::format("%02x%02x", class_id, subclass_id);

        outln(format, seg, bus, device, function, class_name, vendor_name, device_name, revision_id);
    });

    return 0;
}