dist/tcpdump/vfprintf.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 1995
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that: (1) source code distributions
   9  * retain the above copyright notice and this paragraph in its entirety, (2)
  10  * distributions including binary code include the above copyright notice and
  11  * this paragraph in its entirety in the documentation or other materials
  12  * provided with the distribution, and (3) all advertising materials mentioning
  13  * features or use of this software display the following acknowledgement:
  14  * ``This product includes software developed by the University of California,
  15  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  16  * the University nor the names of its contributors may be used to endorse
  17  * or promote products derived from this software without specific prior
  18  * written permission.
  19  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  20  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  21  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  22  */
  23
  24 #include <sys/cdefs.h>
  25 #ifndef lint
  26 #if 0
  27 static const char rcsid[] _U_ =
  28     "@(#) Header: /tcpdump/master/tcpdump/vfprintf.c,v 1.6 2003/11/16 09:36:45 guy Exp (LBL)";
  29 #else
  30 __RCSID("$NetBSD: tcpdump2rcsid.ex,v 1.1 2001/06/25 20:09:58 itojun Exp $");
  31 #endif
  32 #endif
  33
  34 #ifdef HAVE_CONFIG_H
  35 #include "config.h"
  36 #endif
  37
  38 #include <sys/types.h>
  39
  40 #include <stdio.h>
  41 #include <stdarg.h>
  42 #include <stdlib.h>
  43 #include <unistd.h>
  44
  45 #include "interface.h"
  46
  47 /*
  48  * Stock 4.3 doesn't have vfprintf.
  49  * This routine is due to Chris Torek.
  50  */
  51 vfprintf(f, fmt, args)
  52         FILE *f;
  53         char *fmt;
  54         va_list args;
  55 {
  56         int ret;
  57
  58         if ((f->_flag & _IOWRT) == 0) {
  59                 if (f->_flag & _IORW)
  60                         f->_flag |= _IOWRT;
  61                 else
  62                         return EOF;
  63         }
  64         ret = _doprnt(fmt, args, f);
  65         return ferror(f) ? EOF : ret;
  66 }