/**
 * got-diminished – Extension for gates-of-tartaros to minimise memory usage after logging in
 * 
 * Copyright © 2013, 2014  Mattias Andrée (m@maandree.se)
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#include <sys/wait.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>


int
main(int argc, char *argv[])
{
	pid_t pid = vfork();
	if (pid == -1) {
		perror("vfork");
		return 1;
	}

	if (pid) {
		size_t n = 0, i;
		char *stty = argv[2];
		char *stty_cmd;

		waitpid(pid, &pid, 0);
	
		while (stty[n++]);

		stty_cmd = malloc((5 + n) * sizeof(char));
		for (i = 0; i < 5; i++)
			stty_cmd[i] = "stty "[i];
		stty_cmd += 5;
		for (i = 0; i < n; i++)
			stty_cmd[i] = stty[i];
		stty_cmd -= 5;

		system(stty_cmd);
		free(stty_cmd);
	} else {
		execlp("setsid", "setsid", "-c", "login", "--", *(argv + 1), NULL);
	}

	return 0;

	(void) argc;
}