[CentOS] iptables logging

Maciej Żenczykowski maze at cela.pl
Wed May 25 11:29:53 UTC 2005


Definitely missing an include for TIOCLINUX

either
#include some termios.h (not sure which one is correct)
or
#define TIOCLINUX 0x0000541C

On Wed, 25 May 2005, Maciej Żenczykowski wrote:

> Would you want something like this?
>
> Unfortunately the following code was written for a non-standard libc, so it 
> might (will) require some tweaking to get it to compile.
>
> /*
> * GPLv2 (c) Copyright 1999-2005 by Maciej Zenczykowski.
> *
> * Program redirects all kernel messages to tty1
> * (the first virtual terminal).
> */
>
> #include <stdio.h>
> #include <unistd.h>
> #include <sys/types.h>
> #include <sys/stat.h>
> #include <fcntl.h>
> #include <sys/ioctl.h>
>
> int main() {
>  int fd, res;
>  char table[2];
>  table[0] = 11; // TIOCLINUX 11 -> set_kernel_message_redirect
>  table[1] = 1;  // ttyN=1, 0 to turn off redirection
>
>  fd = open("/dev/tty0", O_RDONLY, 0);
>  if (fd < 0) {
>    fprintf(stderr, "ERROR #%d: open_console /dev/tty0\n", errno);
>    return 1;
>  };
>  res = ioctl(fd, TIOCLINUX, &table);
>  if (res < 0) {
>    fprintf(stderr, "ERROR #%d: set_kmsg_redirect\n", errno);
>    close(fd);
>    return 2;
>  };
>
>  close(fd);
>  return 0;
> };
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