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/*
* Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibCore/Account.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/GetPassword.h>
#include <LibCore/System.h>
#include <LibMain/Main.h>
#include <stdio.h>
#include <unistd.h>
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
Vector<char const*> command;
Core::ArgsParser args_parser;
uid_t as_user_uid = 0;
args_parser.add_option(as_user_uid, "User to execute as", nullptr, 'u', "UID");
args_parser.add_positional_argument(command, "Command to run at elevated privilege level", "command");
args_parser.parse(arguments);
TRY(Core::System::pledge("stdio rpath exec id tty"));
TRY(Core::System::seteuid(0));
auto as_user = TRY(Core::Account::from_uid(as_user_uid));
// If the current user is not a superuser, make them authenticate themselves.
if (auto uid = getuid()) {
auto account = TRY(Core::Account::from_uid(uid));
if (account.has_password()) {
auto password = TRY(Core::get_password());
if (!account.authenticate(password))
return Error::from_string_literal("Incorrect or disabled password."sv);
}
}
TRY(Core::System::pledge("stdio rpath exec id"));
TRY(Core::System::setgid(0));
TRY(Core::System::setuid(as_user_uid));
TRY(Core::System::pledge("stdio rpath exec"));
Vector<char const*> exec_arguments;
for (auto const& arg : command)
exec_arguments.append(arg);
exec_arguments.append(nullptr);
Vector<String> environment_strings;
if (auto* term = getenv("TERM"))
environment_strings.append(String::formatted("TERM={}", term));
Vector<char const*> exec_environment;
for (auto& item : environment_strings)
exec_environment.append(item.characters());
exec_environment.append(nullptr);
if (execvpe(command.at(0), const_cast<char**>(exec_arguments.data()), const_cast<char**>(exec_environment.data())) < 0) {
perror("execvpe");
exit(1);
}
return 0;
}
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