#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>

#define version "pppctl v1.0 by Vladimir Gancheff <shudder@gbg.bg>"

void usage(char *name);

main(int argc, char *argv[]) {
  int option;

  if (getuid() != 0) {
    printf("This program should be run by the superuser\n");
    return 1;
  }

  if (argc < 2) {
    printf("%s: option missing\n", argv[0]);
    printf("Try `%s --help' for more information.\n", argv[0]);
    return 1;
  }

  if (strcmp(argv[1], "-c") == 0 || strcmp(argv[1], "--connect") == 0)
    option = 1;

  if (strcmp(argv[1], "-d") == 0 || strcmp(argv[1], "--demand") == 0)
    option = 2;

  if (strcmp(argv[1], "-t") == 0 || strcmp(argv[1], "--terminate") == 0)
    option = 3;

  if (strcmp(argv[1], "--help") == 0)
    option = 4;  

  if (strcmp(argv[1], "--version") == 0)
    option = 5;

  switch(option) {
    case 1:  system("/usr/sbin/pppd -detach connect '/usr/sbin/chat -v -f /etc/ppp/pppscript' &");
             break;
    case 2:  system("/usr/sbin/pppd file '/etc/ppp/options.demand' &");
             printf("%s: demand dialing started\n", argv[0]);
             break;
    case 3:  system("killall -INT pppd 2>/dev/null");
             system("rm -f /var/lock/LCK* /var/run/ppp*.pid");
             printf("%s: terminating connection to ppp0\n", argv[0]);
             break;
    case 4:  usage(argv[0]);
             break;
    case 5:  printf("%s\n", version);
             break;
    default: printf("%s: unrecognized option `%s'\n", argv[0], argv[1]);
             printf("Try `%s --help' for more information.\n", argv[0]);
             return 1;
  }

  return 0;
}

void usage(char *name) {
  printf("Usage: %s [OPTION]\n\n", name);
  printf("\t-c, --connect    create connection\n");
  printf("\t-d, --demand     put pppd in demand dialing mode.\n");
  printf("\t-t, --terminate  terminate connection\n");
  printf("\t    --help       display this help and exit\n");
  printf("\t    --version    output version information and exit\n\n");
  printf("Report bugs to shudder@gbg.bg\n");
}