contrib/tcpdump-3.9/vfprintf.c

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