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907e0b9e1d
Previously, chown would exit immediately if there was an error changing file ownership. We now print an error to stderr and continue when an error occurs.
112 lines
3.4 KiB
C++
112 lines
3.4 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/Vector.h>
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#include <LibCore/ArgsParser.h>
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#include <LibCore/DirIterator.h>
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#include <LibCore/System.h>
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#include <LibMain/Main.h>
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#include <grp.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/stat.h>
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#include <unistd.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 chown"));
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StringView spec;
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Vector<StringView> paths;
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bool no_dereference = false;
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bool recursive = false;
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bool follow_symlinks = false;
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Core::ArgsParser args_parser;
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args_parser.set_general_help("Change the ownership of a file or directory.");
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args_parser.add_option(no_dereference, "Don't follow symlinks", "no-dereference", 'h');
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args_parser.add_option(recursive, "Change file ownership recursively", "recursive", 'R');
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args_parser.add_option(follow_symlinks, "Follow symlinks while recursing into directories", nullptr, 'L');
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args_parser.add_positional_argument(spec, "User and group IDs", "USER[:GROUP]");
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args_parser.add_positional_argument(paths, "Paths to files", "PATH");
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args_parser.parse(arguments);
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uid_t new_uid = -1;
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gid_t new_gid = -1;
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auto parts = spec.split_view(':', SplitBehavior::KeepEmpty);
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if (parts[0].is_empty() || (parts.size() == 2 && parts[1].is_empty()) || parts.size() > 2) {
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warnln("Invalid uid/gid spec");
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return 1;
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}
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auto number = parts[0].to_uint();
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if (number.has_value()) {
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new_uid = number.value();
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} else {
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auto passwd = TRY(Core::System::getpwnam(parts[0]));
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if (!passwd.has_value()) {
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warnln("Unknown user '{}'", parts[0]);
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return 1;
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}
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new_uid = passwd->pw_uid;
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}
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if (parts.size() == 2) {
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auto number = parts[1].to_uint();
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if (number.has_value()) {
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new_gid = number.value();
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} else {
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auto group = TRY(Core::System::getgrnam(parts[1]));
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if (!group.has_value()) {
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warnln("Unknown group '{}'", parts[1]);
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return 1;
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}
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new_gid = group->gr_gid;
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}
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}
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Function<bool(StringView)> update_path_owner = [&](StringView path) {
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auto stat_or_error = Core::System::lstat(path);
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if (stat_or_error.is_error()) {
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warnln("Could not stat '{}': {}", path, stat_or_error.release_error());
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return false;
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}
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auto stat = stat_or_error.release_value();
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if (S_ISLNK(stat.st_mode) && !follow_symlinks && !paths.contains_slow(path))
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return false;
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auto success = true;
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auto maybe_error = no_dereference
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? Core::System::lchown(path, new_uid, new_gid)
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: Core::System::chown(path, new_uid, new_gid);
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if (maybe_error.is_error()) {
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warnln("Failed to change owner of '{}': {}", path, maybe_error.release_error());
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success = false;
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}
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if (recursive && S_ISDIR(stat.st_mode)) {
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Core::DirIterator it(path, Core::DirIterator::Flags::SkipParentAndBaseDir);
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while (it.has_next())
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success &= update_path_owner(it.next_full_path());
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}
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return success;
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};
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auto success = true;
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for (auto const& path : paths) {
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success &= update_path_owner(path);
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}
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return success ? 0 : 1;
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}
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