main.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <sys/types.h>
   4 #include <unistd.h>
   5
   6 // This program will execute the openvpn executable
   7 // passing in through the command line parameters
   8 // The purpose is to allow openvpn to be executed
   9 // as a different user (e.g. root)
  10
  11 int main (int argc, char *argv[]) {
  12     char * const command = "openvpn";
  13     char ** newargv = malloc (sizeof(char*) * (argc + 1));
  14     int arg;
  15
  16     // Transfer the arguments passed in to a new argument array
  17     for (arg = 0; arg < argc; arg++) {
  18         newargv[arg] = argv[arg];
  19     }
  20     // Ensure the argument list is NULL terminated (for execvp)
  21     newargv[argc] = NULL;
  22     // Ensure the first argument matches the command
  23     newargv[0] = command;
  24
  25     // Execute the external command
  26     //setuid (0);
  27     execvp (command, newargv);
  28
  29     // This part of the code shouldn't be reached
  30     printf ("Error executing openvpn\n");
  31
  32     free (newargv);
  33     return 0;
  34 }
  35