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/* $Id: bbsrf.c,v 1.1 2002/03/07 15:13:45 in2 Exp $ */
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/param.h>
#include <sys/types.h>
#include <utmp.h>
#include <pwd.h>
#include <syslog.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/uio.h>
#include "config.h"
/* fill the hid with from hostname */
void gethid(char *hid, char *tty)
{
int fd;
char *tp;
struct utmp data;
gethostname(hid, MAXHOSTNAMELEN);
hid[MAXHOSTNAMELEN] = '\0';
tp = strrchr(tty, '/') + 1;
if (tp && strlen(tp) == 5)
{
fd = open(_PATH_UTMP, O_RDONLY);
if (fd < 0)
syslog(LOG_ERR, "%s: %m", _PATH_UTMP);
else
{
while (read(fd, &data, sizeof(data)) == sizeof(data))
if (strcmp(data.ut_line, tp) == 0)
{
if (data.ut_host[0]) {
#if MAXHOSTNAMELEN < UT_HOSTSIZE
strncpy(hid, data.ut_host, MAXHOSTNAMELEN);
hid[MAXHOSTNAMELEN] = '\0';
#else
strncpy(hid, data.ut_host, UT_HOSTSIZE);
hid[UT_HOSTSIZE] = '\0';
#endif
}
break;
}
close(fd);
}
}
}
/*
get system load averages
return 0 if success; otherwise, return -1.
*/
int getload(double load[3])
{
int rtv = -1;
#if defined(linux)
FILE *fp;
fp = fopen(LOAD_FILE, "r");
if (fp)
{
if (fscanf(fp, "%lf %lf %lf", &load[0], &load[1], &load[2]) == 3)
rtv = 0;
fclose(fp);
}
#elif defined(__FreeBSD__)
if (getloadavg(load, 3) == 3)
rtv = 0;
#endif
return rtv;
}
/*
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[MAXHOSTNAMELEN + 1];
openlog("bbsrf", LOG_PID | LOG_PERROR, LOG_USER);
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");
rtv = -1;
}
break;
}
return rtv;
}
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