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29fb3a1a60
This is only possible if listing an entire directory, because the LibC readdir function will return the raw inode number in each struct dirent, therefore allowing to print it as well.
595 lines
20 KiB
C++
595 lines
20 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/DeprecatedString.h>
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#include <AK/HashMap.h>
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#include <AK/NumberFormat.h>
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#include <AK/QuickSort.h>
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#include <AK/StringBuilder.h>
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#include <AK/URL.h>
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#include <AK/Utf8View.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/System.h>
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#include <LibFileSystem/FileSystem.h>
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#include <LibMain/Main.h>
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#include <ctype.h>
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <grp.h>
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#include <inttypes.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/sysmacros.h>
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#include <sys/types.h>
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#include <time.h>
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#include <unistd.h>
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struct FileMetadata {
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DeprecatedString name;
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DeprecatedString path;
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ino_t raw_inode_number;
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struct stat stat {
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};
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};
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static int do_file_system_object_long(DeprecatedString const& path);
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static int do_file_system_object_short(DeprecatedString const& path);
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static bool print_names(char const* path, size_t longest_name, Vector<FileMetadata> const& files);
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static bool filemetadata_comparator(FileMetadata& a, FileMetadata& b);
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static bool flag_classify = false;
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static bool flag_colorize = false;
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static bool flag_long = false;
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static bool flag_show_dotfiles = false;
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static bool flag_show_almost_all_dotfiles = false;
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static bool flag_ignore_backups = false;
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static bool flag_list_directories_only = false;
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static bool flag_show_inode = false;
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static bool flag_show_raw_inode = false;
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static bool flag_print_numeric = false;
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static bool flag_hide_group = false;
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static bool flag_human_readable = false;
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static bool flag_human_readable_si = false;
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static bool flag_sort_by_timestamp = false;
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static bool flag_reverse_sort = false;
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static bool flag_disable_hyperlinks = false;
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static bool flag_recursive = false;
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static bool flag_force_newline = false;
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static size_t terminal_rows = 0;
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static size_t terminal_columns = 0;
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static bool output_is_terminal = false;
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static HashMap<uid_t, DeprecatedString> users;
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static HashMap<gid_t, DeprecatedString> groups;
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static bool is_a_tty = false;
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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 tty"));
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struct winsize ws;
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int rc = ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws);
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if (rc == 0) {
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terminal_rows = ws.ws_row;
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terminal_columns = ws.ws_col;
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output_is_terminal = true;
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}
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is_a_tty = isatty(STDOUT_FILENO);
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if (!is_a_tty) {
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flag_disable_hyperlinks = true;
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} else {
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flag_colorize = true;
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}
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TRY(Core::System::pledge("stdio rpath"));
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Vector<StringView> paths;
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Core::ArgsParser args_parser;
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args_parser.set_general_help("List files in a directory.");
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args_parser.add_option(flag_show_dotfiles, "Show dotfiles", "all", 'a');
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args_parser.add_option(flag_show_almost_all_dotfiles, "Do not list implied . and .. directories", nullptr, 'A');
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args_parser.add_option(flag_ignore_backups, "Do not list implied entries ending with ~", "ignore-backups", 'B');
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args_parser.add_option(flag_list_directories_only, "List directories themselves, not their contents", "directory", 'd');
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args_parser.add_option(flag_long, "Display long info", "long", 'l');
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args_parser.add_option(flag_sort_by_timestamp, "Sort files by timestamp", nullptr, 't');
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args_parser.add_option(flag_reverse_sort, "Reverse sort order", "reverse", 'r');
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args_parser.add_option(flag_classify, "Append a file type indicator to entries", "classify", 'F');
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args_parser.add_option(flag_colorize, "Use pretty colors", nullptr, 'G');
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args_parser.add_option(flag_show_inode, "Show inode ids", "inode", 'i');
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args_parser.add_option(flag_show_raw_inode, "Show raw inode ids if possible", "raw-inode", 'I');
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args_parser.add_option(flag_print_numeric, "In long format, display numeric UID/GID", "numeric-uid-gid", 'n');
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args_parser.add_option(flag_hide_group, "In long format, do not show group information", nullptr, 'o');
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args_parser.add_option(flag_human_readable, "Print human-readable sizes", "human-readable", 'h');
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args_parser.add_option(flag_human_readable_si, "Print human-readable sizes in SI units", "si", 0);
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args_parser.add_option(flag_disable_hyperlinks, "Disable hyperlinks", "no-hyperlinks", 'K');
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args_parser.add_option(flag_recursive, "List subdirectories recursively", "recursive", 'R');
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args_parser.add_option(flag_force_newline, "List one file per line", nullptr, '1');
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args_parser.add_positional_argument(paths, "Directory to list", "path", Core::ArgsParser::Required::No);
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args_parser.parse(arguments);
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if (flag_show_almost_all_dotfiles)
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flag_show_dotfiles = true;
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if (flag_long) {
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setpwent();
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for (auto* pwd = getpwent(); pwd; pwd = getpwent())
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users.set(pwd->pw_uid, pwd->pw_name);
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endpwent();
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setgrent();
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for (auto* grp = getgrent(); grp; grp = getgrent())
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groups.set(grp->gr_gid, grp->gr_name);
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endgrent();
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}
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auto do_file_system_object = [&](DeprecatedString const& path) {
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if (flag_long)
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return do_file_system_object_long(path);
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return do_file_system_object_short(path);
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};
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if (paths.is_empty())
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paths.append("."sv);
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Vector<FileMetadata> files;
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for (auto& path : paths) {
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FileMetadata metadata {};
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metadata.name = path;
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int rc = lstat(DeprecatedString(path).characters(), &metadata.stat);
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if (rc < 0) {
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perror("lstat");
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continue;
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}
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files.append(metadata);
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}
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quick_sort(files, filemetadata_comparator);
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int status = 0;
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for (size_t i = 0; i < files.size(); i++) {
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auto path = files[i].name;
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if (flag_recursive && FileSystem::is_directory(path)) {
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size_t subdirs = 0;
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Core::DirIterator di(path, Core::DirIterator::SkipParentAndBaseDir);
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if (di.has_error()) {
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status = 1;
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fprintf(stderr, "%s: %s\n", path.characters(), strerror(di.error().code()));
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}
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while (di.has_next()) {
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DeprecatedString directory = di.next_full_path();
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if (FileSystem::is_directory(directory) && !FileSystem::is_link(directory)) {
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++subdirs;
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FileMetadata new_file;
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new_file.name = move(directory);
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files.insert(i + subdirs, move(new_file));
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}
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}
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}
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bool show_dir_separator = files.size() > 1 && FileSystem::is_directory(path) && !flag_list_directories_only;
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if (show_dir_separator) {
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printf("%s:\n", path.characters());
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}
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auto rc = do_file_system_object(path);
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if (rc != 0)
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status = rc;
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if (show_dir_separator && i != files.size() - 1) {
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puts("");
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}
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}
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return status;
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}
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static int print_escaped(StringView name)
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{
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int printed = 0;
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Utf8View utf8_name(name);
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if (utf8_name.validate()) {
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out("{}", name);
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return utf8_name.length();
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}
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for (auto c : name) {
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if (is_ascii_printable(c)) {
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putchar(c);
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printed++;
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} else {
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printed += printf("\\%03d", c);
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}
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}
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return printed;
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}
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static DeprecatedString& hostname()
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{
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static DeprecatedString s_hostname;
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if (s_hostname.is_null()) {
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char buffer[HOST_NAME_MAX];
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if (gethostname(buffer, sizeof(buffer)) == 0)
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s_hostname = buffer;
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else
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s_hostname = "localhost";
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}
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return s_hostname;
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}
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static size_t print_name(const struct stat& st, DeprecatedString const& name, Optional<StringView> path_for_link_resolution, StringView path_for_hyperlink)
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{
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if (!flag_disable_hyperlinks) {
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auto full_path_or_error = FileSystem::real_path(path_for_hyperlink);
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if (!full_path_or_error.is_error()) {
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auto fullpath = full_path_or_error.release_value();
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auto url = URL::create_with_file_scheme(fullpath.to_deprecated_string(), {}, hostname());
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out("\033]8;;{}\033\\", url.serialize());
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}
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}
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size_t nprinted = 0;
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if (!flag_colorize || !output_is_terminal) {
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nprinted = printf("%s", name.characters());
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} else {
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char const* begin_color = "";
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char const* end_color = "\033[0m";
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if (st.st_mode & S_ISVTX)
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begin_color = "\033[42;30;1m";
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else if (st.st_mode & S_ISUID)
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begin_color = "\033[41;1m";
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else if (st.st_mode & S_ISGID)
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begin_color = "\033[43;1m";
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else if (S_ISLNK(st.st_mode))
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begin_color = "\033[36;1m";
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else if (S_ISDIR(st.st_mode))
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begin_color = "\033[34;1m";
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else if (st.st_mode & 0111)
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begin_color = "\033[32;1m";
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else if (S_ISSOCK(st.st_mode))
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begin_color = "\033[35;1m";
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else if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))
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begin_color = "\033[33;1m";
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printf("%s", begin_color);
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nprinted = print_escaped(name);
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printf("%s", end_color);
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}
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if (S_ISLNK(st.st_mode)) {
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if (path_for_link_resolution.has_value()) {
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auto link_destination_or_error = FileSystem::read_link(path_for_link_resolution.value());
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if (link_destination_or_error.is_error()) {
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warnln("readlink of {} failed: {}", path_for_link_resolution.value(), link_destination_or_error.error());
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} else {
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nprinted += printf(" -> ") + print_escaped(link_destination_or_error.value());
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}
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} else {
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if (flag_classify)
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nprinted += printf("@");
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}
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} else if (S_ISDIR(st.st_mode)) {
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if (flag_classify)
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nprinted += printf("/");
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} else if (st.st_mode & 0111) {
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if (flag_classify)
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nprinted += printf("*");
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}
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if (!flag_disable_hyperlinks) {
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printf("\033]8;;\033\\");
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}
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return nprinted;
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}
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static bool print_filesystem_object(DeprecatedString const& path, DeprecatedString const& name, const struct stat& st, Optional<ino_t> raw_inode_number)
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{
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if (flag_show_inode) {
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printf("%s ", DeprecatedString::formatted("{}", st.st_ino).characters());
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} else if (flag_show_raw_inode) {
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if (raw_inode_number.has_value())
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printf("%s ", DeprecatedString::formatted("{}", raw_inode_number.value()).characters());
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else
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printf("n/a ");
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}
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if (S_ISDIR(st.st_mode))
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printf("d");
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else if (S_ISLNK(st.st_mode))
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printf("l");
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else if (S_ISBLK(st.st_mode))
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printf("b");
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else if (S_ISCHR(st.st_mode))
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printf("c");
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else if (S_ISFIFO(st.st_mode))
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printf("f");
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else if (S_ISSOCK(st.st_mode))
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printf("s");
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else if (S_ISREG(st.st_mode))
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printf("-");
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else
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printf("?");
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printf("%c%c%c%c%c%c%c%c",
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st.st_mode & S_IRUSR ? 'r' : '-',
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st.st_mode & S_IWUSR ? 'w' : '-',
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st.st_mode & S_ISUID ? 's' : (st.st_mode & S_IXUSR ? 'x' : '-'),
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st.st_mode & S_IRGRP ? 'r' : '-',
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st.st_mode & S_IWGRP ? 'w' : '-',
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st.st_mode & S_ISGID ? 's' : (st.st_mode & S_IXGRP ? 'x' : '-'),
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st.st_mode & S_IROTH ? 'r' : '-',
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st.st_mode & S_IWOTH ? 'w' : '-');
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if (st.st_mode & S_ISVTX)
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printf("t");
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else
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printf("%c", st.st_mode & S_IXOTH ? 'x' : '-');
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printf(" %3lu", st.st_nlink);
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auto username = users.get(st.st_uid);
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if (!flag_print_numeric && username.has_value()) {
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printf(" %7s", username.value().characters());
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} else {
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printf(" %7u", st.st_uid);
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}
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if (!flag_hide_group) {
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auto groupname = groups.get(st.st_gid);
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if (!flag_print_numeric && groupname.has_value()) {
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printf(" %7s", groupname.value().characters());
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} else {
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printf(" %7u", st.st_gid);
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}
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}
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if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode)) {
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printf(" %4u,%4u ", major(st.st_rdev), minor(st.st_rdev));
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} else {
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if (flag_human_readable) {
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printf(" %10s ", human_readable_size(st.st_size).characters());
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} else if (flag_human_readable_si) {
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printf(" %10s ", human_readable_size(st.st_size, AK::HumanReadableBasedOn::Base10).characters());
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} else {
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printf(" %10" PRIu64 " ", (uint64_t)st.st_size);
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}
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}
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printf(" %s ", Core::DateTime::from_timestamp(st.st_mtime).to_deprecated_string().characters());
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print_name(st, name, path.view(), path);
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printf("\n");
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return true;
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}
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static bool print_filesystem_metadata_object(FileMetadata const& file)
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{
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return print_filesystem_object(file.path, file.name, file.stat, file.raw_inode_number);
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}
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static int do_file_system_object_long(DeprecatedString const& path)
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{
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if (flag_list_directories_only) {
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struct stat stat {
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};
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int rc = lstat(path.characters(), &stat);
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if (rc < 0)
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perror("lstat");
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if (flag_show_raw_inode)
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fprintf(stderr, "warning: can't print raw inode numbers\n");
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if (print_filesystem_object(path, path, stat, {}))
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return 0;
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return 2;
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}
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auto flags = Core::DirIterator::SkipDots;
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if (flag_show_dotfiles)
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flags = Core::DirIterator::Flags::NoFlags;
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if (flag_show_almost_all_dotfiles)
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flags = Core::DirIterator::SkipParentAndBaseDir;
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Core::DirIterator di(path, flags);
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if (di.has_error()) {
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auto error = di.error();
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if (error.code() == ENOTDIR) {
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struct stat stat {
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};
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int rc = lstat(path.characters(), &stat);
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if (rc < 0)
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perror("lstat");
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if (flag_show_raw_inode)
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fprintf(stderr, "warning: can't print raw inode numbers\n");
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if (print_filesystem_object(path, path, stat, {}))
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return 0;
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return 2;
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}
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fprintf(stderr, "%s: %s\n", path.characters(), strerror(di.error().code()));
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return 1;
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}
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Vector<FileMetadata> files;
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while (di.has_next()) {
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auto dirent = di.next().value();
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FileMetadata metadata {};
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metadata.name = dirent.name;
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metadata.raw_inode_number = dirent.inode_number;
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VERIFY(!metadata.name.is_empty());
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if (metadata.name.ends_with('~') && flag_ignore_backups && metadata.name != path)
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continue;
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StringBuilder builder;
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builder.append(path);
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builder.append('/');
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builder.append(metadata.name);
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metadata.path = builder.to_deprecated_string();
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VERIFY(!metadata.path.is_null());
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int rc = lstat(metadata.path.characters(), &metadata.stat);
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if (rc < 0)
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perror("lstat");
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files.append(move(metadata));
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}
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quick_sort(files, filemetadata_comparator);
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for (auto& file : files) {
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if (!print_filesystem_metadata_object(file))
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return 2;
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}
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return 0;
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}
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static bool print_filesystem_object_short(DeprecatedString const& path, char const* name, Optional<ino_t> raw_inode_number, size_t* nprinted)
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{
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struct stat st;
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int rc = lstat(path.characters(), &st);
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if (rc == -1) {
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printf("lstat(%s) failed: %s\n", path.characters(), strerror(errno));
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return false;
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}
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|
|
if (flag_show_inode) {
|
|
printf("%s ", DeprecatedString::formatted("{}", st.st_ino).characters());
|
|
} else if (flag_show_raw_inode) {
|
|
if (raw_inode_number.has_value())
|
|
printf("%s ", DeprecatedString::formatted("{}", raw_inode_number.value()).characters());
|
|
else
|
|
printf("n/a ");
|
|
}
|
|
|
|
*nprinted = print_name(st, name, {}, path);
|
|
return true;
|
|
}
|
|
|
|
static bool print_names(char const* path, size_t longest_name, Vector<FileMetadata> const& files)
|
|
{
|
|
size_t printed_on_row = 0;
|
|
size_t nprinted = 0;
|
|
for (size_t i = 0; i < files.size(); ++i) {
|
|
auto& name = files[i].name;
|
|
StringBuilder builder;
|
|
builder.append({ path, strlen(path) });
|
|
builder.append('/');
|
|
builder.append(name);
|
|
if (!print_filesystem_object_short(builder.to_deprecated_string(), name.characters(), files[i].raw_inode_number, &nprinted))
|
|
return 2;
|
|
int offset = 0;
|
|
if (terminal_columns > longest_name)
|
|
offset = terminal_columns % longest_name / (terminal_columns / longest_name);
|
|
|
|
// The offset must be at least 2 because:
|
|
// - With each file an additional char is printed e.g. '@','*'.
|
|
// - Each filename must be separated by a space.
|
|
size_t column_width = longest_name + max(offset, 2);
|
|
printed_on_row += column_width;
|
|
|
|
if (is_a_tty) {
|
|
for (size_t j = nprinted; i != (files.size() - 1) && j < column_width; ++j)
|
|
printf(" ");
|
|
}
|
|
if ((printed_on_row + column_width) >= terminal_columns || flag_force_newline) {
|
|
printf("\n");
|
|
printed_on_row = 0;
|
|
}
|
|
}
|
|
return printed_on_row;
|
|
}
|
|
|
|
int do_file_system_object_short(DeprecatedString const& path)
|
|
{
|
|
if (flag_list_directories_only) {
|
|
if (flag_show_raw_inode)
|
|
fprintf(stderr, "warning: can't print raw inode numbers\n");
|
|
size_t nprinted = 0;
|
|
bool status = print_filesystem_object_short(path, path.characters(), {}, &nprinted);
|
|
printf("\n");
|
|
if (status)
|
|
return 0;
|
|
return 2;
|
|
}
|
|
|
|
auto flags = Core::DirIterator::SkipDots;
|
|
if (flag_show_dotfiles)
|
|
flags = Core::DirIterator::Flags::NoFlags;
|
|
if (flag_show_almost_all_dotfiles)
|
|
flags = Core::DirIterator::SkipParentAndBaseDir;
|
|
|
|
Core::DirIterator di(path, flags);
|
|
if (di.has_error()) {
|
|
auto error = di.error();
|
|
if (error.code() == ENOTDIR) {
|
|
size_t nprinted = 0;
|
|
if (flag_show_raw_inode)
|
|
fprintf(stderr, "warning: can't print raw inode numbers\n");
|
|
bool status = print_filesystem_object_short(path, path.characters(), {}, &nprinted);
|
|
printf("\n");
|
|
if (status)
|
|
return 0;
|
|
return 2;
|
|
}
|
|
fprintf(stderr, "%s: %s\n", path.characters(), strerror(di.error().code()));
|
|
return 1;
|
|
}
|
|
|
|
Vector<FileMetadata> files;
|
|
size_t longest_name = 0;
|
|
while (di.has_next()) {
|
|
auto dirent = di.next().value();
|
|
FileMetadata metadata {};
|
|
metadata.name = dirent.name;
|
|
metadata.raw_inode_number = dirent.inode_number;
|
|
|
|
if (metadata.name.ends_with('~') && flag_ignore_backups && metadata.name != path)
|
|
continue;
|
|
|
|
StringBuilder builder;
|
|
builder.append(path);
|
|
builder.append('/');
|
|
builder.append(metadata.name);
|
|
metadata.path = builder.to_deprecated_string();
|
|
VERIFY(!metadata.path.is_null());
|
|
int rc = lstat(metadata.path.characters(), &metadata.stat);
|
|
if (rc < 0)
|
|
perror("lstat");
|
|
|
|
files.append(metadata);
|
|
if (metadata.name.length() > longest_name)
|
|
longest_name = metadata.name.length();
|
|
}
|
|
quick_sort(files, filemetadata_comparator);
|
|
|
|
if (print_names(path.characters(), longest_name, files))
|
|
printf("\n");
|
|
return 0;
|
|
}
|
|
|
|
bool filemetadata_comparator(FileMetadata& a, FileMetadata& b)
|
|
{
|
|
if (flag_sort_by_timestamp && (a.stat.st_mtime != b.stat.st_mtime))
|
|
return (a.stat.st_mtime > b.stat.st_mtime) ^ flag_reverse_sort;
|
|
return (a.name < b.name) ^ flag_reverse_sort;
|
|
}
|