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      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 "interface.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 }
     55