/*
GetXNSid.c
-- Copyright Ó 1988 by Xerox Corporation.  All rights reserved.
 *  A grand kludge for getting the XNS ID from a standard SUNOS 4.0 kernel;
 *  The problem is that to open the NIT, you have to be SUID root, and we don't
 *  want cedar running that way, so we fork another little program to do the
 *  real work, then read the results from a pipe.
 */
#include <stdio.h>

typedef unsigned short BYTE;				

typedef struct HostNumber_self {
	BYTE a :8;
	BYTE b :8;
	BYTE c :8;
	BYTE d :8;
	BYTE e :8;
	BYTE f :8;
	} XNSID_HostNumber;

typedef struct ProcessorID_self {
	XNSID_HostNumber anon0;
	} XNSID_ProcessorID;

extern void
XR_getxnshostid(pid)
XNSID_ProcessorID *pid;
{
  int i, scanresult;
  int buffer[6];
  int errorval = 10;
  FILE *sh;
  
  if (pid == NULL) return;
  
  sh = popen("getxnshostid", "r");
  
  /* all 0 return -> error */
  pid->anon0.a = 0;
  pid->anon0.b = 0;
  pid->anon0.c = 0;
  pid->anon0.d = 0;
  pid->anon0.e = 0;
  pid->anon0.f = 0;
  
  if (sh == NULL) return; /* all 0 return -> error */
  
  for (i = 0; i < 6; i++) {
    scanresult = fscanf(sh, "%x", &buffer[i]);
    if (scanresult != 1) break; /* all 0 return -> error */
    };
  pclose(sh);

  
  if (i < 6) return; /* all 0 return -> error */

  pid->anon0.a = buffer[0];
  pid->anon0.b = buffer[1];
  pid->anon0.c = buffer[2];
  pid->anon0.d = buffer[3];
  pid->anon0.e = buffer[4];
  pid->anon0.f = buffer[5];

  return;
}