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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/JsonArray.h>
#include <AK/JsonObject.h>
#include <AK/NumberFormat.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/Stream.h>
#include <LibMain/Main.h>
#include <inttypes.h>
#include <stdlib.h>
struct FileSystem {
DeprecatedString fs;
size_t total_block_count { 0 };
size_t free_block_count { 0 };
size_t total_inode_count { 0 };
size_t free_inode_count { 0 };
size_t block_size { 0 };
DeprecatedString mount_point;
};
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
bool flag_human_readable = false;
bool flag_human_readable_si = false;
bool flag_inode_info = false;
Core::ArgsParser args_parser;
args_parser.set_general_help("Display free disk space of each partition.");
args_parser.add_option(flag_human_readable, "Print human-readable sizes", "human-readable", 'h');
args_parser.add_option(flag_human_readable_si, "Print human-readable sizes in SI units", "si", 'H');
args_parser.add_option(flag_inode_info, "Show inode information as well", "inodes", 'i');
args_parser.parse(arguments);
auto file = TRY(Core::Stream::File::open("/sys/kernel/df"sv, Core::Stream::OpenMode::Read));
Vector<StringView> headers;
TRY(headers.try_append(flag_human_readable ? "Size"sv : "Blocks"sv));
TRY(headers.try_append("Used"sv));
TRY(headers.try_append("Available"sv));
TRY(headers.try_append("Used%"sv));
if (flag_inode_info) {
TRY(headers.try_append("Inodes"sv));
TRY(headers.try_append("IUsed"sv));
TRY(headers.try_append("IAvailable"sv));
TRY(headers.try_append("IUsed%"sv));
}
TRY(headers.try_append("Mount point"sv));
out("{:12} ", "Filesystem");
for (auto& header : headers)
out("{:>12} ", header);
outln();
auto file_contents = TRY(file->read_until_eof());
auto json_result = TRY(JsonValue::from_string(file_contents));
auto const& json = json_result.as_array();
json.for_each([&](auto& value) {
auto& fs_object = value.as_object();
auto fs = fs_object.get_deprecated_string("class_name"sv).value_or({});
auto total_block_count = fs_object.get_u64("total_block_count"sv).value_or(0);
auto free_block_count = fs_object.get_u64("free_block_count"sv).value_or(0);
auto used_block_count = total_block_count - free_block_count;
auto total_inode_count = fs_object.get_u64("total_inode_count"sv).value_or(0);
auto free_inode_count = fs_object.get_u64("free_inode_count"sv).value_or(0);
auto used_inode_count = total_inode_count - free_inode_count;
auto block_size = fs_object.get_u64("block_size"sv).value_or(0);
auto mount_point = fs_object.get_deprecated_string("mount_point"sv).value_or({});
auto used_percentage = 100;
if (total_block_count != 0)
used_percentage = (used_block_count * 100) / total_block_count;
auto used_inode_percentage = 100;
if (total_inode_count != 0)
used_inode_percentage = (used_inode_count * 100) / total_inode_count;
out("{:12} ", fs);
bool human_readable = flag_human_readable || flag_human_readable_si;
auto human_readable_based_on = flag_human_readable_si ? AK::HumanReadableBasedOn::Base10 : AK::HumanReadableBasedOn::Base2;
if (human_readable) {
out("{:>12} ", human_readable_size(total_block_count * block_size, human_readable_based_on));
out("{:>12} ", human_readable_size(used_block_count * block_size, human_readable_based_on));
out("{:>12} ", human_readable_size(free_block_count * block_size, human_readable_based_on));
out("{:>11}% ", used_percentage);
} else {
out("{:>12} ", (uint64_t)total_block_count);
out("{:>12} ", (uint64_t)used_block_count);
out("{:>12} ", (uint64_t)free_block_count);
out("{:>11}% ", used_percentage);
}
if (flag_inode_info) {
if (human_readable) {
out("{:>12} ", human_readable_quantity(total_inode_count, human_readable_based_on));
out("{:>12} ", human_readable_quantity(used_inode_count, human_readable_based_on));
out("{:>12} ", human_readable_quantity(free_inode_count, human_readable_based_on));
out("{:>11}% ", used_inode_percentage);
} else {
out("{:>12} ", (uint64_t)total_inode_count);
out("{:>12} ", (uint64_t)used_inode_count);
out("{:>12} ", (uint64_t)free_inode_count);
out("{:>11}% ", used_inode_percentage);
}
}
out("{}", mount_point);
outln();
});
return 0;
}
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