toaruos/apps/whoami.c

/**
 * @brief uses getpwuid and geteuid to retrieve the current user's name.
 *
 * @copyright
 * This file is part of ToaruOS and is released under the terms
 * of the NCSA / University of Illinois License - see LICENSE.md
 * Copyright (C) 2013-2021 K. Lange
 */
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <pwd.h>

int main(int argc, char ** argv) {
	struct passwd * p = getpwuid(geteuid());
	if (!p) return 0;

	fprintf(stdout, "%s\n", p->pw_name);

	endpwent();

	return 0;
}