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serenity/Userland/Services/LoginServer/main.cpp

110 lines
3.1 KiB
C++

/*
* Copyright (c) 2021, Peter Elliott <pelliott@serenityos.org>.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibCore/Account.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/System.h>
#include <LibGUI/Application.h>
#include <LibMain/Main.h>
#include <Services/LoginServer/LoginWindow.h>
#include <errno.h>
#include <string.h>
#include <sys/wait.h>
#include <unistd.h>
static void child_process(Core::Account const& account)
{
if (!account.login()) {
dbgln("failed to switch users: {}", strerror(errno));
exit(1);
}
setenv("HOME", account.home_directory().characters(), true);
pid_t rc = setsid();
if (rc == -1) {
dbgln("failed to setsid: {}", strerror(errno));
exit(1);
}
dbgln("login with sid={}", rc);
execlp("/bin/SystemServer", "SystemServer", "--user", nullptr);
dbgln("failed to exec SystemServer --user: {}", strerror(errno));
exit(127);
}
static void login(Core::Account const& account, LoginWindow& window)
{
pid_t pid = fork();
if (pid == 0)
child_process(account);
int wstatus;
pid_t rc = waitpid(pid, &wstatus, 0);
if (rc == -1)
dbgln("waitpid failed: {}", strerror(errno));
if (rc != 0)
dbgln("SystemServer exited with non-zero status: {}", rc);
window.show();
}
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
auto app = GUI::Application::construct(arguments);
TRY(Core::System::pledge("stdio recvfd sendfd rpath exec proc id"));
TRY(Core::System::unveil("/home", "r"));
TRY(Core::System::unveil("/etc/passwd", "r"));
TRY(Core::System::unveil("/etc/shadow", "r"));
TRY(Core::System::unveil("/etc/group", "r"));
TRY(Core::System::unveil("/bin/SystemServer", "x"));
TRY(Core::System::unveil("/res", "r"));
TRY(Core::System::unveil(nullptr, nullptr));
auto window = LoginWindow::construct();
window->on_submit = [&]() {
auto username = window->username();
auto password = Core::SecretString::take_ownership(window->password().to_byte_buffer());
window->set_password("");
auto account = Core::Account::from_name(username.characters());
if (account.is_error()) {
dbgln("failed graphical login for user {}: {}", username, account.error());
return;
}
if (!account.value().authenticate(password)) {
dbgln("failed graphical login for user {}: invalid password", username);
return;
}
window->set_username("");
window->hide();
login(account.value(), *window);
};
char const* auto_login = nullptr;
Core::ArgsParser args_parser;
args_parser.add_option(auto_login, "automatically log in with no prompt", "auto-login", 'a', "username");
args_parser.parse(arguments);
if (!auto_login) {
window->show();
} else {
auto account = Core::Account::from_name(auto_login);
if (account.is_error()) {
dbgln("failed auto-login for user {}: {}", auto_login, account.error());
return 1;
}
login(account.value(), *window);
}
return app->exec();
}