lib/libc/stdio/vdprintf.c

   1 /*-
   2  * Copyright (c) 2009 David Schultz <das@FreeBSD.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/lib/libc/stdio/vdprintf.c,v 1.1 2009/03/04 03:38:51 das Exp $
  27  */
  28
  29 #include "namespace.h"
  30 #include <errno.h>
  31 #include <limits.h>
  32 #include <stdarg.h>
  33 #include <stdio.h>
  34 #include "un-namespace.h"
  35
  36 #include "local.h"
  37 #include "priv_stdio.h"
  38
  39 int
  40 vdprintf(int fd, const char * __restrict fmt, va_list ap)
  41 {
  42         FILE f;
  43         unsigned char buf[BUFSIZ];
  44         int ret;
  45
  46         if (fd > SHRT_MAX) {
  47                 errno = EMFILE;
  48                 return (EOF);
  49         }
  50
  51         f.pub._p = buf;
  52         f.pub._w = sizeof(buf);
  53         f.pub._flags = __SWR;
  54         f.pub._fileno = fd;
  55         f._cookie = &f;
  56         f._write = __swrite;
  57         f._bf._base = buf;
  58         f._bf._size = sizeof(buf);
  59         memset(WCIO_GET(&f), 0, sizeof(struct wchar_io_data));
  60
  61         if ((ret = __vfprintf(&f, fmt, ap)) < 0)
  62                 return (ret);
  63
  64         return (__fflush(&f) ? EOF : ret);
  65 }