source: rtems/c/src/lib/libc/dup2.c @ 66387986

4.104.114.84.95
Last change on this file since 66387986 was 9c49db4, checked in by Joel Sherrill <joel.sherrill@…>, on 01/08/01 at 18:26:44

2001-01-08 Ralf Corsepius <corsepiu@…>

  • configure.in: Add libc/config.h
  • libc/Makefile.am: Add INCLUDES += -I. to pickup config.h
  • libc/.cvsignore: Add config.h and stamp-h
  • libc/*.c: Add config.h support.
  • Property mode set to 100644
File size: 944 bytes
Line 
1/*
2 *  dup2() - POSIX 1003.1b 6.2.1 Duplicate an Open File Descriptor
3 *
4 *  COPYRIGHT (c) 1989-1999.
5 *  On-Line Applications Research Corporation (OAR).
6 *
7 *  The license and distribution terms for this file may be
8 *  found in the file LICENSE in this distribution or at
9 *  http://www.OARcorp.com/rtems/license.html.
10 *
11 *  $Id$
12 */
13
14#if HAVE_CONFIG_H
15#include "config.h"
16#endif
17
18#include <unistd.h>
19#include <fcntl.h>
20
21#include <rtems/libio_.h>
22
23int dup2(
24  int fildes,
25  int fildes2
26)
27{
28  int          status;
29  struct stat  buf;
30
31  /*
32   *  If fildes is not valid, then fildes2 should not be closed.
33   */
34
35  status = fstat( fildes, &buf );
36  if ( status == -1 )
37    return -1;
38
39  /*
40   *  If fildes2 is not valid, then we should not do anything either.
41   */
42
43  status = fstat( fildes2, &buf );
44  if ( status == -1 )
45    return -1;
46
47  /*
48   *  This fcntl handles everything else.
49   */
50 
51  return fcntl( fildes, F_DUPFD, fildes2 );
52}
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