/* Safety wrapper for "traceroute" */
/* See the copyright notice at the end of this file. */
/* Last edited on 2024-12-25 10:17:06 by stolfi */

#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include <mailroute_doc.h>

#define MYNAME mailroute
#define MAXLEN 255
#define TRACEROUTE /n/net/bin/traceroute

typedef unsigned char byte;

void error(char *msg, char *arg);
int main(int argc, char **argv);

int main (int argc, char **argv)
{
  static char *usage = "usage: %s: hostname"; 
  char *h; byte *p; 
  byte valid[256];
  
  /* Set up valid charset */
  { int i; byte *p; 
    for(i=0;i<256;i++){ valid[i] = 0; }
    for(p=((byte *)"-+_.");*p;p++){ valid[*p] = 1; }
    for(i='0';i<='9';i++){ valid[i] = 1; }
    for(i='A';i<='Z';i++){ valid[i+32] = valid[i] = 1; }
  }
  
  /* Check argument */
  if (argc != 2) { error(usage, argv[0]); }
  h = argv[1];
  if (strlen(h) > MAXLEN) { error("%s: argument too long", argv[0]); }
  for(p=(byte *)h;*p;p++) { if(!valid[*p]) { error("%s: bad char in hostname", argv[0]); } }
  
  /* Call traceroute: */
  execl("TRACEROUTE", "TRACEROUTE", h, NULL);

  /* If we get here, the exec failed: */
  perror("MYNAME");  
  exit(1);
}

void error(char *msg, char *arg)
{
  fprintf(stderr, msg, arg); 
  exit(1);
}

/****************************************************************************/
/* (C) Copyright 1992 Universidade Estadual de Campinas (UNICAMP)           */
/*                    Campinas, SP, Brazil                                  */
/*                                                                          */
/* Authors:                                                                 */
/*                                                                          */
/*   Jorge Stolfi        - Inst. Computing, UNICAMP <stolfi@dcc.unicamp.br> */
/*                                                                          */
/* This file can be freely distributed, modified, and used for any          */
/*   non-commercial purpose, provided that this copyright and authorship    */
/*   notice are included in any copy or derived version of this file.       */
/*                                                                          */
/* DISCLAIMER: This software is offered ``as is'', without any guarantee    */
/*   as to fitness for any particular purpose.  Neither the copyright       */
/*   holder nor the authors or their employers can be held responsible for  */
/*   any damages that may result from its use.                              */
/****************************************************************************/