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/* $Id$ */
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <pwd.h>
#include <syslog.h>
#include "config.h"
#define MAX_REMOTE_IP_LEN 32
static void get_remote_ip(int len, char *remote_ip)
{
char frombuf[100];
// note, SSH_CLIENT is deprecated since 2002
char *ssh_client = getenv("SSH_CONNECTION");
if (ssh_client) {
// SSH_CONNECTION format: "client-ip client-port server-ip server-port"
sscanf(ssh_client, "%s", frombuf);
} else {
strcpy(frombuf, "127.0.0.1");
}
strlcpy(remote_ip, frombuf, len);
}
/*
show ban file
if filename exist, print it out, sleep 10 second, and return 0;
otherwise, return -1.
*/
static int showbanfile(const char *filename)
{
FILE *fp;
char buf[256];
fp = fopen(filename, "r");
if (fp)
{
while (fgets(buf, sizeof(buf), fp))
fputs(buf, stdout);
printf("\n============================="
"=============================\n");
fclose(fp);
sleep(10);
}
return fp ? 0 : -1;
}
int main(void)
{
int uid;
char *tty, remote_ip[MAX_REMOTE_IP_LEN + 1];
openlog("bbsrf", LOG_PID | LOG_PERROR, LOG_USER);
chdir(BBSHOME);
uid = getuid();
if (uid != BBSUID) {
syslog(LOG_ERR, "UID DOES NOT MATCH");
return -1;
}
if (!getpwuid(uid)) {
syslog(LOG_ERR, "YOU DONT EXIST");
return -1;
}
if (!showbanfile(BAN_FILE)) {
return 1;
}
get_remote_ip(sizeof(remote_ip), remote_ip);
tty = ttyname(0);
if (tty == NULL)
tty = "notty";
execl(BBSPROG, "mbbsd", remote_ip, tty, NULL);
syslog(LOG_ERR, "execl(): %m");
sleep(3); // prevent flooding
return -1;
}
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