1 | /* Copyright (c) 2016 Phoenix Systems |
---|
2 | All rights reserved. |
---|
3 | |
---|
4 | Redistribution and use in source and binary forms, with or without |
---|
5 | modification, are permitted provided that the following conditions |
---|
6 | are met: |
---|
7 | 1. Redistributions of source code must retain the above copyright |
---|
8 | notice, this list of conditions and the following disclaimer. |
---|
9 | 2. Redistributions in binary form must reproduce the above copyright |
---|
10 | notice, this list of conditions and the following disclaimer in the |
---|
11 | documentation and/or other materials provided with the distribution. |
---|
12 | |
---|
13 | THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
---|
14 | ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
---|
15 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
---|
16 | ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
---|
17 | FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
---|
18 | DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
---|
19 | OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
---|
20 | HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
---|
21 | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
---|
22 | OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
---|
23 | SUCH DAMAGE.*/ |
---|
24 | |
---|
25 | #include "syscall.h" |
---|
26 | |
---|
27 | #include <errno.h> |
---|
28 | #include <fcntl.h> |
---|
29 | |
---|
30 | int dup(int oldfd) |
---|
31 | { |
---|
32 | int ret = fcntl(oldfd, F_DUPFD, 0); |
---|
33 | if (ret < 0) { |
---|
34 | errno = -ret; |
---|
35 | return -1; |
---|
36 | } |
---|
37 | |
---|
38 | return ret; |
---|
39 | } |
---|
40 | |
---|
41 | int dup2(int oldfd, int newfd) |
---|
42 | { |
---|
43 | int ret = syscall2(int, SYS_DUP2, oldfd, newfd); |
---|
44 | if (ret < 0) { |
---|
45 | errno = -ret; |
---|
46 | return -1; |
---|
47 | } |
---|
48 | |
---|
49 | return ret; |
---|
50 | } |
---|