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587f9af960
Also add slightly richer parse errors now that we can include a string literal with returned errors. This will allow us to use TRY() when working with JSON data.
80 lines
2.7 KiB
C++
80 lines
2.7 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@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/Assertions.h>
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#include <AK/ByteBuffer.h>
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#include <AK/JsonArray.h>
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#include <AK/JsonObject.h>
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#include <AK/NumberFormat.h>
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#include <AK/String.h>
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#include <LibCore/ArgsParser.h>
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#include <LibCore/File.h>
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#include <inttypes.h>
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#include <stdlib.h>
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static bool flag_human_readable = false;
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struct FileSystem {
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String fs;
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size_t total_block_count { 0 };
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size_t free_block_count { 0 };
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size_t total_inode_count { 0 };
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size_t free_inode_count { 0 };
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size_t block_size { 0 };
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String mount_point;
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};
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int main(int argc, char** argv)
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{
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Core::ArgsParser args_parser;
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args_parser.set_general_help("Display free disk space of each partition.");
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args_parser.add_option(flag_human_readable, "Print human-readable sizes", "human-readable", 'h');
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args_parser.parse(argc, argv);
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auto file = Core::File::construct("/proc/df");
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if (!file->open(Core::OpenMode::ReadOnly)) {
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warnln("Failed to open {}: {}", file->name(), file->error_string());
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return 1;
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}
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if (flag_human_readable) {
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outln("Filesystem Size Used Available Mount point");
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} else {
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outln("Filesystem Blocks Used Available Mount point");
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}
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auto file_contents = file->read_all();
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auto json_result = JsonValue::from_string(file_contents).release_value_but_fixme_should_propagate_errors();
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auto const& json = json_result.as_array();
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json.for_each([](auto& value) {
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auto& fs_object = value.as_object();
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auto fs = fs_object.get("class_name").to_string();
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auto total_block_count = fs_object.get("total_block_count").to_u64();
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auto free_block_count = fs_object.get("free_block_count").to_u64();
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[[maybe_unused]] auto total_inode_count = fs_object.get("total_inode_count").to_u64();
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[[maybe_unused]] auto free_inode_count = fs_object.get("free_inode_count").to_u64();
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auto block_size = fs_object.get("block_size").to_u64();
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auto mount_point = fs_object.get("mount_point").to_string();
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out("{:10}", fs);
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if (flag_human_readable) {
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out("{:>10} ", human_readable_size(total_block_count * block_size));
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out("{:>10} ", human_readable_size((total_block_count - free_block_count) * block_size));
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out("{:>10} ", human_readable_size(free_block_count * block_size));
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} else {
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out("{:>10} ", (uint64_t)total_block_count);
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out("{:>10} ", (uint64_t)(total_block_count - free_block_count));
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out("{:>10} ", (uint64_t)free_block_count);
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}
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out("{}", mount_point);
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outln();
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});
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return 0;
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}
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