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/*
* Copyright (c) 2021, Brandon Pruitt <brapru@pm.me>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibCore/Account.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <pwd.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
int main(int argc, char** argv)
{
if (geteuid() != 0) {
warnln("Not running as root :^(");
return 1;
}
if (setegid(0) < 0) {
perror("setegid");
return 1;
}
if (pledge("stdio wpath rpath cpath fattr tty", nullptr) < 0) {
perror("pledge");
return 1;
}
if (unveil("/etc", "rwc") < 0) {
perror("unveil");
return 1;
}
int uid = 0;
int gid = 0;
bool lock = false;
bool unlock = false;
const char* new_home_directory = nullptr;
bool move_home = false;
const char* shell = nullptr;
const char* gecos = nullptr;
const char* username = nullptr;
auto args_parser = Core::ArgsParser();
args_parser.set_general_help("Modify a user account");
args_parser.add_option(uid, "The new numerical value of the user's ID", "uid", 'u', "uid");
args_parser.add_option(gid, "The group number of the user's new initial login group", "gid", 'g', "gid");
args_parser.add_option(lock, "Lock password", "lock", 'L');
args_parser.add_option(unlock, "Unlock password", "unlock", 'U');
args_parser.add_option(new_home_directory, "The user's new login directory", "home", 'd', "new-home");
args_parser.add_option(move_home, "Move the content of the user's home directory to the new location", "move", 'm');
args_parser.add_option(shell, "The name of the user's new login shell", "shell", 's', "path-to-shell");
args_parser.add_option(gecos, "Change the GECOS field of the user", "gecos", 'n', "general-info");
args_parser.add_positional_argument(username, "Username of the account to modify", "username");
args_parser.parse(argc, argv);
auto account_or_error = Core::Account::from_name(username);
if (account_or_error.is_error()) {
warnln("Core::Account::from_name: {}", account_or_error.error());
return 1;
}
// target_account is the account we are modifying.
auto& target_account = account_or_error.value();
if (move_home) {
if (unveil(target_account.home_directory().characters(), "c") < 0) {
perror("unveil");
return 1;
}
if (unveil(new_home_directory, "wc") < 0) {
perror("unveil");
return 1;
}
}
unveil(nullptr, nullptr);
if (uid) {
if (uid < 0) {
warnln("invalid uid {}", uid);
return 1;
}
if (getpwuid(static_cast<uid_t>(uid))) {
warnln("uid {} already exists", uid);
return 1;
}
target_account.set_uid(uid);
}
if (gid) {
if (gid < 0) {
warnln("invalid gid {}", gid);
return 1;
}
target_account.set_gid(gid);
}
if (lock) {
target_account.set_password_enabled(false);
}
if (unlock) {
target_account.set_password_enabled(true);
}
if (new_home_directory) {
if (move_home) {
int rc = rename(target_account.home_directory().characters(), new_home_directory);
if (rc < 0) {
if (errno == EXDEV) {
auto result = Core::File::copy_file_or_directory(
new_home_directory, target_account.home_directory().characters(),
Core::File::RecursionMode::Allowed,
Core::File::LinkMode::Disallowed,
Core::File::AddDuplicateFileMarker::No);
if (result.is_error()) {
warnln("usermod: could not move directory {} : {}", target_account.home_directory().characters(), result.error().error_code);
return 1;
}
rc = unlink(target_account.home_directory().characters());
if (rc < 0)
warnln("usermod: unlink {} : {}", target_account.home_directory().characters(), strerror(errno));
} else {
warnln("usermod: could not move directory {} : {}", target_account.home_directory().characters(), strerror(errno));
}
}
}
target_account.set_home_directory(new_home_directory);
}
if (shell) {
target_account.set_shell(shell);
}
if (gecos) {
target_account.set_gecos(gecos);
}
if (pledge("stdio wpath rpath cpath fattr", nullptr) < 0) {
perror("pledge");
return 1;
}
if (!target_account.sync()) {
perror("Core::Account::Sync");
return 1;
}
return 0;
}
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