usr/src/lib/libc/stdio/fprintf.c

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not 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 MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)fprintf.c   5.4 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

#include <stdio.h>

fprintf(iop, fmt, args)
        register FILE *iop;
        char *fmt;
        int args;
{
        int len;
        char localbuf[BUFSIZ];

        if (iop->_flag & _IONBF) {
                iop->_flag &= ~_IONBF;
                iop->_ptr = iop->_base = localbuf;
                iop->_bufsiz = BUFSIZ;
                len = _doprnt(fmt, &args, iop);
                fflush(iop);
                iop->_flag |= _IONBF;
                iop->_base = NULL;
                iop->_bufsiz = NULL;
                iop->_cnt = 0;
        } else
                len = _doprnt(fmt, &args, iop);
        return(ferror(iop) ? EOF : len);
}