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su: Port to LibMain :^)

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This commit is contained in:
Andreas Kling 2021-12-16 19:34:21 +01:00
parent 411c696057
commit e5a5091b6f
2 changed files with 17 additions and 48 deletions
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63
Userland/Utilities/su.cpp
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@ -8,76 +8,45 @@
#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>
extern "C" int main(int, char**);
int main(int argc, char** argv)
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
if (pledge("stdio rpath tty exec id", nullptr) < 0) {
perror("pledge");
return 1;
}
TRY(Core::System::pledge("stdio rpath tty exec id"));
if (!isatty(STDIN_FILENO)) {
warnln("{}: standard in is not a terminal", argv[0]);
return 1;
}
if (!TRY(Core::System::isatty(STDIN_FILENO)))
return Error::from_string_literal("Standard input is not a terminal");
const char* user = nullptr;
Core::ArgsParser args_parser;
args_parser.add_positional_argument(user, "User to switch to (defaults to user with UID 0)", "user", Core::ArgsParser::Required::No);
args_parser.parse(argc, argv);
args_parser.parse(arguments);
if (geteuid() != 0) {
warnln("Not running as root :(");
return 1;
}
if (geteuid() != 0)
return Error::from_string_literal("Not running as root :(");
auto account_or_error = (user)
? Core::Account::from_name(user)
: Core::Account::from_uid(0);
if (account_or_error.is_error()) {
warnln("Core::Account::from_name: {}", account_or_error.error());
return 1;
}
auto account = TRY(user ? Core::Account::from_name(user) : Core::Account::from_uid(0));
if (pledge("stdio tty exec id", nullptr) < 0) {
perror("pledge");
return 1;
}
const auto& account = account_or_error.value();
TRY(Core::System::pledge("stdio tty exec id"));
if (getuid() != 0 && account.has_password()) {
auto password = Core::get_password();
if (password.is_error()) {
warnln("{}", password.error());
return 1;
}
if (!account.authenticate(password.value())) {
warnln("Incorrect or disabled password.");
return 1;
}
auto password = TRY(Core::get_password());
if (!account.authenticate(password))
return Error::from_string_literal("Incorrect or disabled password.");
}
if (pledge("stdio exec id", nullptr) < 0) {
perror("pledge");
return 1;
}
TRY(Core::System::pledge("stdio exec id"));
if (!account.login()) {
perror("Core::Account::login");
return 1;
}
if (pledge("stdio exec", nullptr) < 0) {
perror("pledge");
return 1;
}
TRY(Core::System::pledge("stdio exec"));
execl(account.shell().characters(), account.shell().characters(), nullptr);
perror("execl");