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vfprintf.c

/*
 * Copyright (c) 1995
 *    The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that: (1) source code distributions
 * retain the above copyright notice and this paragraph in its entirety, (2)
 * distributions including binary code include the above copyright notice and
 * this paragraph in its entirety in the documentation or other materials
 * provided with the distribution, and (3) all advertising materials mentioning
 * features or use of this software display the following acknowledgement:
 * ``This product includes software developed by the University of California,
 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
 * the University nor the names of its contributors may be used to endorse
 * or promote products derived from this software without specific prior
 * written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static const char rcsid[] =
    "@(#) $Header: vfprintf.c,v 1.2 96/09/26 23:36:51 leres Exp $ (LBL)";
#endif

#include <sys/types.h>

#include <stdio.h>
#if __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#include <stdlib.h>
#include <unistd.h>

#include "interface.h"

/*
 * Stock 4.3 doesn't have vfprintf.
 * This routine is due to Chris Torek.
 */
vfprintf(f, fmt, args)
      FILE *f;
      char *fmt;
      va_list args;
{
      int ret;

      if ((f->_flag & _IOWRT) == 0) {
            if (f->_flag & _IORW)
                  f->_flag |= _IOWRT;
            else
                  return EOF;
      }
      ret = _doprnt(fmt, args, f);
      return ferror(f) ? EOF : ret;
}

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