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https://github.com/RGBCube/serenity
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7772309169
This patch returns an empty Optional<...> instead of an Error for Core::System::getgrname and Core::System::getpwnam if we can't find a matching group or user entry. It also updates the 'chown' utility to support this new behavior.
69 lines
1.7 KiB
C++
69 lines
1.7 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/String.h>
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#include <AK/Vector.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", nullptr));
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if (arguments.strings.size() < 3) {
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warnln("usage: chown <uid[:gid]> <path>");
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return 1;
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}
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uid_t new_uid = -1;
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gid_t new_gid = -1;
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auto parts = arguments.strings[1].split_view(':', true);
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if (parts.is_empty()) {
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warnln("Empty uid/gid spec");
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return 1;
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}
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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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TRY(Core::System::chown(arguments.strings[2], new_uid, new_gid));
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return 0;
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}
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