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All of these conditions should make du just not report the file size individually, but it should still count them into the grand total. In the case of the `--threshold` option, this was actually implemented incorrectly before, as it would report size 0 for files that did not match the threshold.
203 lines
7.3 KiB
C++
203 lines
7.3 KiB
C++
/*
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* Copyright (c) 2020, Fei Wu <f.eiwu@yahoo.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/LexicalPath.h>
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#include <AK/NumberFormat.h>
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#include <AK/String.h>
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#include <AK/Vector.h>
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#include <LibCore/ArgsParser.h>
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#include <LibCore/DateTime.h>
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#include <LibCore/DirIterator.h>
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#include <LibCore/File.h>
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#include <LibCore/System.h>
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#include <LibMain/Main.h>
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#include <limits.h>
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#include <string.h>
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#include <sys/stat.h>
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struct DuOption {
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enum class TimeType {
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NotUsed,
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Modification,
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Access,
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Status
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};
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bool human_readable = false;
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bool all = false;
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bool apparent_size = false;
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i64 threshold = 0;
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TimeType time_type = TimeType::NotUsed;
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Vector<String> excluded_patterns;
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u64 block_size = 1024;
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size_t max_depth = SIZE_MAX;
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};
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static ErrorOr<void> parse_args(Main::Arguments arguments, Vector<String>& files, DuOption& du_option);
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static ErrorOr<u64> print_space_usage(String const& path, DuOption const& du_option, size_t current_depth, bool inside_dir = false);
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ErrorOr<int> serenity_main(Main::Arguments arguments)
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{
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Vector<String> files;
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DuOption du_option;
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TRY(parse_args(arguments, files, du_option));
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for (auto const& file : files)
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TRY(print_space_usage(file, du_option, 0));
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return 0;
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}
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ErrorOr<void> parse_args(Main::Arguments arguments, Vector<String>& files, DuOption& du_option)
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{
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bool summarize = false;
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char const* pattern = nullptr;
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char const* exclude_from = nullptr;
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Vector<StringView> files_to_process;
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Core::ArgsParser::Option time_option {
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Core::ArgsParser::OptionArgumentMode::Required,
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"Show time of type time-type of any file in the directory, or any of its subdirectories. "
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"Available choices: mtime, modification, ctime, status, use, atime, access",
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"time",
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0,
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"time-type",
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[&du_option](auto const* option_ptr) {
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StringView option { option_ptr, strlen(option_ptr) };
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if (option == "mtime"sv || option == "modification"sv)
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du_option.time_type = DuOption::TimeType::Modification;
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else if (option == "ctime"sv || option == "status"sv || option == "use"sv)
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du_option.time_type = DuOption::TimeType::Status;
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else if (option == "atime"sv || option == "access"sv)
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du_option.time_type = DuOption::TimeType::Access;
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else
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return false;
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return true;
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}
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};
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Core::ArgsParser::Option block_size_1k_option {
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Core::ArgsParser::OptionArgumentMode::None,
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"Equivalent to `--block-size 1024`",
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nullptr,
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'k',
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nullptr,
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[&du_option](auto const*) {
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du_option.block_size = 1024;
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return true;
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}
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};
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Core::ArgsParser args_parser;
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args_parser.set_general_help("Display actual or apparent disk usage of files or directories.");
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args_parser.add_option(du_option.all, "Write counts for all files, not just directories", "all", 'a');
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args_parser.add_option(du_option.apparent_size, "Print apparent sizes, rather than disk usage", "apparent-size", 0);
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args_parser.add_option(du_option.human_readable, "Print human-readable sizes", "human-readable", 'h');
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args_parser.add_option(du_option.max_depth, "Print the total for a directory or file only if it is N or fewer levels below the command line argument", "max-depth", 'd', "N");
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args_parser.add_option(summarize, "Display only a total for each argument", "summarize", 's');
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args_parser.add_option(du_option.threshold, "Exclude entries smaller than size if positive, or entries greater than size if negative", "threshold", 't', "size");
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args_parser.add_option(move(time_option));
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args_parser.add_option(pattern, "Exclude files that match pattern", "exclude", 0, "pattern");
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args_parser.add_option(exclude_from, "Exclude files that match any pattern in file", "exclude-from", 'X', "file");
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args_parser.add_option(du_option.block_size, "Outputs file sizes as the required blocks with the given size (defaults to 1024)", "block-size", 'B', "size");
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args_parser.add_option(move(block_size_1k_option));
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args_parser.add_positional_argument(files_to_process, "File to process", "file", Core::ArgsParser::Required::No);
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args_parser.parse(arguments);
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if (summarize)
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du_option.max_depth = 0;
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if (pattern)
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du_option.excluded_patterns.append(pattern);
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if (exclude_from) {
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auto file = TRY(Core::File::open(exclude_from, Core::OpenMode::ReadOnly));
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auto const buff = file->read_all();
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if (!buff.is_empty()) {
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String patterns = String::copy(buff, Chomp);
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du_option.excluded_patterns.extend(patterns.split('\n'));
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}
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}
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for (auto const& file : files_to_process) {
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files.append(file);
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}
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if (files.is_empty()) {
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files.append(".");
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}
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return {};
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}
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ErrorOr<u64> print_space_usage(String const& path, DuOption const& du_option, size_t current_depth, bool inside_dir)
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{
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u64 size = 0;
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struct stat path_stat = TRY(Core::System::lstat(path));
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bool const is_directory = S_ISDIR(path_stat.st_mode);
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if (is_directory) {
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auto di = Core::DirIterator(path, Core::DirIterator::SkipParentAndBaseDir);
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if (di.has_error()) {
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outln("du: cannot read directory '{}': {}", path, di.error_string());
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return Error::from_string_literal("An error occurred. See previous error.");
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}
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while (di.has_next()) {
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auto const child_path = di.next_full_path();
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size += TRY(print_space_usage(child_path, du_option, current_depth + 1, true));
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}
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}
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auto const basename = LexicalPath::basename(path);
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for (auto const& pattern : du_option.excluded_patterns) {
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if (basename.matches(pattern, CaseSensitivity::CaseSensitive))
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return { 0 };
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}
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if (!du_option.apparent_size) {
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constexpr auto block_size = 512;
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size += path_stat.st_blocks * block_size;
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} else {
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size += path_stat.st_size;
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}
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bool is_beyond_depth = current_depth > du_option.max_depth;
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bool is_inner_file = inside_dir && !is_directory;
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bool is_outside_threshold = (du_option.threshold > 0 && size < static_cast<u64>(du_option.threshold)) || (du_option.threshold < 0 && size > static_cast<u64>(-du_option.threshold));
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// All of these still count towards the full size, they are just not reported on individually.
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if (is_beyond_depth || (is_inner_file && !du_option.all) || is_outside_threshold)
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return size;
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if (du_option.human_readable) {
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out("{}", human_readable_size(size));
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} else {
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out("{}", ceil_div(size, du_option.block_size));
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}
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if (du_option.time_type == DuOption::TimeType::NotUsed) {
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outln("\t{}", path);
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} else {
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auto time = path_stat.st_mtime;
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switch (du_option.time_type) {
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case DuOption::TimeType::Access:
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time = path_stat.st_atime;
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break;
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case DuOption::TimeType::Status:
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time = path_stat.st_ctime;
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break;
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default:
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break;
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}
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auto const formatted_time = Core::DateTime::from_timestamp(time).to_string();
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outln("\t{}\t{}", formatted_time, path);
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}
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return { size };
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}
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