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/* $Id$ */
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/param.h>
#include <sys/types.h>
#include <pwd.h>
#include <syslog.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/uio.h>
#include "config.h"
#ifdef Solaris
#include <utmpx.h>
#define U_FILE UTMPX_FILE
#else
#include <utmp.h>
#define U_FILE UTMP_FILE
#endif
#ifdef __FreeBSD__
#define UTMP_FILE _PATH_UTMP
#endif
#ifndef Solaris
#if MAXHOSTNAMELEN < UT_HOSTSIZE
#define MAX_HOMENAME_LEN MAXHOSTNAMELEN
#else
#define MAX_HOMENAME_LEN UT_HOSTSIZE
#endif
#else
/* according to /usr/include/utmpx.h ... */
#define MAX_HOMENAME_LEN 256
#endif
/* fill the hid with from hostname */
void gethid(char *hid, char *tty)
{
char frombuf[100];
if (getenv("SSH_CLIENT"))
sscanf(getenv("SSH_CLIENT"), "%s", frombuf);
else
strcpy(frombuf, "127.0.0.1");
if (strrchr(frombuf, ':'))
strncpy(hid, strrchr(frombuf, ':') + 1, MAX_HOMENAME_LEN);
else
strncpy(hid, frombuf, MAX_HOMENAME_LEN);
}
/*
show ban file
if filename exist, print it out, sleep 1 second, and return 0;
otherwise, return -1.
*/
int showbanfile(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(1);
}
return fp ? 0 : -1;
}
int main(void)
{
int uid, rtv = 0;
char *tty, ttybuf[32], hid[MAX_HOMENAME_LEN + 1];
#ifndef Solaris
openlog("bbsrf", LOG_PID | LOG_PERROR, LOG_USER);
#else
openlog("bbsrf", LOG_PID, LOG_USER);
#endif
chdir(BBSHOME);
uid = getuid();
while (1)
{
if (!showbanfile(BAN_FILE))
{
rtv = 1;
break;
}
else if (uid != BBSUID)
{
syslog(LOG_ERR, "UID DOES NOT MATCH");
rtv = -1;
break;
}
else if (!getpwuid(uid))
{
syslog(LOG_ERR, "YOU DONT EXIST");
rtv = -1;
break;
}
else
{
tty = ttyname(0);
if (tty)
{
strcpy(ttybuf, tty);
gethid(hid, ttybuf);
}
else
{
strcpy(ttybuf, "notty");
strcpy(hid, "unknown");
}
execl(BBSPROG, "mbbsd", hid, ttybuf, NULL);
syslog(LOG_ERR, "execl(): %m");
sleep(3); // prevent flooding
rtv = -1;
}
break;
}
return rtv;
}
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