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/*
* (C) 2013-2024 by Christian Hesse <mail@eworm.de>
*
* Based on ideas from Sleep Dummy Shell (SleepShell)
* by Mario A. Valdez-Ramirez (http://www.mariovaldez.net/)
*
* 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 <https://www.gnu.org/licenses/>.
*
*/
#define _GNU_SOURCE
#include <inttypes.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "config.h"
#include "version.h"
void sig_callback(int signal) {
printf("\nReceived signal '%s', quitting.\nBye!\n", strsignal(signal));
exit(EXIT_SUCCESS);
}
int main(int argc, char **argv) {
time_t now;
uint8_t start;
char *ssh_connection, *ssh_client, *ssh_tty;
char * string = BANNER;
/* get the start time and calculate modulo */
time(&now);
start = (now / 30) % 30;
/* read environment variables */
ssh_connection = getenv("SSH_CONNECTION");
ssh_client = getenv("SSH_CLIENT");
ssh_tty = getenv("SSH_TTY");
/* register signal callbacks */
struct sigaction act = { 0 };
act.sa_handler = sig_callback;
sigaction(SIGINT, &act, NULL);
sigaction(SIGTERM, &act, NULL);
/* clear the screen and set cursor to the top left
* see 'man 4 console_codes' for details */
fputs("\033[2J\033[1;1H", stdout);
fflush(NULL);
/* print some info if available */
if (ssh_connection != NULL && ssh_client != NULL) {
printf("Connection: %s\nClient: %s\n", ssh_connection, ssh_client);
if (ssh_tty != NULL)
printf("Terminal: %s\n", ssh_tty);
}
/* print an character every SLEEPTIME seconds */
while (1) {
sleep(SLEEPTIME);
putchar(*string);
fflush(NULL);
if (*string == 0) {
time(&now);
if ((now / 30) % 30 != start)
string = ctime(&now);
else
string = BANNER;
} else
string++;
}
/* we should never get here.... */
return EXIT_SUCCESS;
}
// vim: set syntax=c:
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