lib/libc/stdio/vdprintf.c

   1 /*-
   2  * Copyright (c) 2009 David Schultz <das@FreeBSD.org>
   3  * All rights reserved.
   4  *
   5  * Copyright (c) 2011 The FreeBSD Foundation
   6  * All rights reserved.
   7  * Portions of this software were developed by David Chisnall
   8  * under sponsorship from the FreeBSD Foundation.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  * $FreeBSD: head/lib/libc/stdio/vdprintf.c 227753 2011-11-20 14:45:42Z theraven $
  32  */
  33
  34 #include "namespace.h"
  35 #include <errno.h>
  36 #include <limits.h>
  37 #include <stdarg.h>
  38 #include <stdio.h>
  39 #include "un-namespace.h"
  40
  41 #include "local.h"
  42 #include "xlocale_private.h"
  43
  44 int
  45 vdprintf(int fd, const char * __restrict fmt, va_list ap)
  46 {
  47         FILE f = FAKE_FILE;
  48         unsigned char buf[BUFSIZ];
  49         int ret;
  50
  51         if (fd > SHRT_MAX) {
  52                 errno = EMFILE;
  53                 return (EOF);
  54         }
  55
  56         f.pub._p = buf;
  57         f.pub._w = sizeof(buf);
  58         f.pub._flags = __SWR;
  59         f.pub._fileno = fd;
  60         f._cookie = &f;
  61         f._write = __swrite;
  62         f._bf._base = buf;
  63         f._bf._size = sizeof(buf);
  64
  65         if ((ret = __vfprintf(&f, __get_locale(), fmt, ap)) < 0)
  66                 return (ret);
  67
  68         return (__fflush(&f) ? EOF : ret);
  69 }