tools/compat/dprintf.c

   1 /*      $NetBSD: dprintf.c,v 1.2 2013/03/05 16:29:09 christos Exp $     */
   2
   3 /*-
   4  * Copyright (c) 2013 NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Christos Zoulas.
   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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #ifdef HAVE_NBTOOL_CONFIG_H
  33 #include "nbtool_config.h"
  34 #endif
  35
  36 #if !HAVE_DPRINTF
  37 #include <stdlib.h>
  38 #ifndef HAVE_NBTOOL_CONFIG_H
  39 /* These headers are required, but included from nbtool_config.h */
  40 #include <stdio.h>
  41 #include <stdarg.h>
  42 #include <unistd.h>
  43 #endif
  44
  45 int
  46 dprintf(int fd, const char *fmt, ...)
  47 {
  48         FILE *fp;
  49         int e;
  50         va_list ap;
  51
  52         if ((e = dup(fd)) == -1)
  53                 return -1;
  54
  55         if ((fp = fdopen(e, "r+")) == NULL) {
  56                 (void)close(e);
  57                 return -1;
  58         }
  59
  60         va_start(ap, fmt);
  61         e = vfprintf(fp, fmt, ap);
  62         va_end(ap);
  63
  64         (void)fclose(fp);
  65         return e;
  66 }
  67
  68 #endif  /* HAVE_DPRINTF */
  69
  70 #ifdef TEST
  71 int
  72 main(int argc, char *argv[])
  73 {
  74         dprintf(1, "Hello %s\n", "world");
  75         return 0;
  76 }
  77 #endif