dmake/unix/bsd43/vf/vfprintf.c

   1 /*
   2  * Copyright (c) 1988 Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms are permitted
   6  * provided that the above copyright notice and this paragraph are
   7  * duplicated in all such forms and that any documentation,
   8  * advertising materials, and other materials related to such
   9  * distribution and use acknowledge that the software was developed
  10  * by the University of California, Berkeley.  The name of the
  11  * University may not be used to endorse or promote products derived
  12  * from this software without specific prior written permission.
  13  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  14  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  15  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  16  */
  17
  18 #if defined(LIBC_SCCS) && !defined(lint)
  19 static char sccsid[] = "@(#)vfprintf.c  5.2 (Berkeley) 6/27/88";
  20 #endif /* LIBC_SCCS and not lint */
  21
  22 #include <stdio.h>
  23 #include <varargs.h>
  24
  25 int
  26 vfprintf(iop, fmt, ap)
  27     FILE *iop;
  28     char *fmt;
  29     va_list ap;
  30 {
  31     int len;
  32     char localbuf[BUFSIZ];
  33
  34     if (iop->_flag & _IONBF) {
  35         iop->_flag &= ~_IONBF;
  36         iop->_ptr = iop->_base = localbuf;
  37         len = _doprnt(fmt, ap, iop);
  38         (void) fflush(iop);
  39         iop->_flag |= _IONBF;
  40         iop->_base = NULL;
  41         iop->_bufsiz = 0;
  42         iop->_cnt = 0;
  43     } else
  44         len = _doprnt(fmt, ap, iop);
  45
  46     return (ferror(iop) ? EOF : len);
  47 }
  48