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/*
* groovy.c
*
* An example program for CERBERUS.
* ( http://sourceforge.jp/projects/tomoyo/document/winf2005-en.pdf )
*
* Copyright (C) 2005-2009 NTT DATA CORPORATION
*
* Version: 1.7.0 2009/09/03
*/
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <pwd.h>
static const char *get_shell(void)
{
static char *shell = NULL;
if (!shell) {
struct passwd *pw = getpwuid(getuid());
shell = pw ? pw->pw_shell : "/bin/sh";
}
return shell;
}
int main(int argc, char *argv[])
{
static char buffer[1024];
static const char *lockfile = "/tmp/.lockme";
int trial;
const char *shell = get_shell();
for (trial = 0; trial < 3; trial++) {
memset(buffer, 0, sizeof(buffer));
printf("Password: ");
fgets(buffer, sizeof(buffer) - 1, stdin);
if (shell) {
int fd;
fd = open(lockfile, O_WRONLY | O_CREAT | O_EXCL, 0600);
if (fd != EOF) {
close(fd);
execlp(shell, shell, NULL);
}
}
sleep(3);
}
printf("Authentication Failure\n");
return 0;
}
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