contrib/tcpdump/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 #ifdef HAVE_CONFIG_H
  23 #include "config.h"
  24 #endif
  25
  26 #include <sys/types.h>
  27
  28 #include <stdio.h>
  29 #include <stdarg.h>
  30 #include <stdlib.h>
  31 #include <unistd.h>
  32
  33 #include "netdissect.h"
  34
  35 /*
  36  * Stock 4.3 doesn't have vfprintf.
  37  * This routine is due to Chris Torek.
  38  */
  39 vfprintf(f, fmt, args)
  40         FILE *f;
  41         char *fmt;
  42         va_list args;
  43 {
  44         int ret;
  45
  46         if ((f->_flag & _IOWRT) == 0) {
  47                 if (f->_flag & _IORW)
  48                         f->_flag |= _IOWRT;
  49                 else
  50                         return EOF;
  51         }
  52         ret = _doprnt(fmt, args, f);
  53         return ferror(f) ? EOF : ret;
  54 }