src/misc-progs/getconntracktable.c

   1 /* IPFire helper program - getconntracktable
   2  *
   3  * This program is distributed under the terms of the GNU General Public
   4  * Licence.  See the file COPYING for details.
   5  *
   6  * The kernel's connection tracking table is not readable by
   7  * non-root users. So this helper will just read and output it.
   8  */
   9
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include "setuid.h"
  13
  14 int main(void) {
  15         if (!(initsetuid()))
  16                 exit(1);
  17
  18         FILE *fp = fopen("/proc/net/nf_conntrack", "r");
  19         if (fp == NULL) {
  20                 exit(1);
  21         }
  22
  23         /* Read content line by line and write it to stdout. */
  24         char linebuf[STRING_SIZE];
  25         while (fgets(linebuf, STRING_SIZE, fp)) {
  26                 printf("%s", linebuf);
  27         }
  28
  29         fclose(fp);
  30         return 0;
  31 }