mirror of
https://github.com/RGBCube/serenity
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062e0db46c
Since it will become a stream in a little bit, it should behave like all non-trivial stream classes, who are not primarily intended to have shared ownership to make closing behavior more predictable. Across all uses of MappedFile, there is only one use case of shared mapped files in LibVideo, which now uses the thin SharedMappedFile wrapper.
49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
/*
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* Copyright (c) 2021, Andrew Kaster <akaster@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/DeprecatedString.h>
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#include <LibCore/ArgsParser.h>
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#include <LibCore/MappedFile.h>
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#include <LibCore/System.h>
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#include <LibDeviceTree/FlattenedDeviceTree.h>
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#include <LibDeviceTree/Validation.h>
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#include <LibMain/Main.h>
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ErrorOr<int> serenity_main(Main::Arguments arguments)
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{
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TRY(Core::System::pledge("stdio rpath"));
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DeprecatedString filename;
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Core::ArgsParser args;
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args.add_positional_argument(filename, "File to process", "file", Core::ArgsParser::Required::Yes);
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args.parse(arguments);
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// FIXME: Figure out how to do this sanely from stdin
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auto file = TRY(Core::MappedFile::map(filename));
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if (file->size() < sizeof(DeviceTree::FlattenedDeviceTreeHeader)) {
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warnln("Not enough data in {} to contain a device tree header!", filename);
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return 1;
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}
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auto const* fdt_header = reinterpret_cast<DeviceTree::FlattenedDeviceTreeHeader const*>(file->data());
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auto bytes = file->bytes();
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TRY(DeviceTree::dump(*fdt_header, bytes));
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auto compatible = TRY(DeviceTree::slow_get_property<StringView>("/compatible"sv, *fdt_header, bytes));
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auto compatible_strings = compatible.split_view('\0');
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dbgln("compatible with: {}", compatible_strings);
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auto bootargs = TRY(DeviceTree::slow_get_property<StringView>("/chosen/bootargs"sv, *fdt_header, bytes));
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dbgln("bootargs: {}", bootargs);
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auto cpu_compatible = TRY(DeviceTree::slow_get_property<StringView>("/cpus/cpu@0/compatible"sv, *fdt_header, bytes));
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dbgln("cpu0 compatible: {}", cpu_compatible);
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return 0;
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}
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