projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 04277e02 | 1 | /* Copyright (C) 2008-2019 Free Software Foundation, Inc. |
| bdcebfc4 UD |
2 | This file is part of the GNU C Library. |
| 3 | ||
| 4 | The GNU C Library is free software; you can redistribute it and/or | |
| 5 | modify it under the terms of the GNU Lesser General Public | |
| 6 | License as published by the Free Software Foundation; either | |
| 7 | version 2.1 of the License, or (at your option) any later version. | |
| 8 | ||
| 9 | The GNU C Library is distributed in the hope that it will be useful, | |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | Lesser General Public License for more details. | |
| 13 | ||
| 14 | You should have received a copy of the GNU Lesser General Public | |
| 59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
| 16 | <http://www.gnu.org/licenses/>. */ | |
| bdcebfc4 UD |
17 | |
| 18 | #include <errno.h> | |
| 19 | #include <fcntl.h> | |
| 20 | #include <unistd.h> | |
| 21 | ||
| 22 | ||
| 23 | /* Duplicate FD to FD2, closing the old FD2 and making FD2 be | |
| 24 | open the same file as FD is which setting flags according to | |
| 25 | FLAGS. Return FD2 or -1. */ | |
| 26 | int | |
| 9d46370c | 27 | __dup3 (int fd, int fd2, int flags) |
| bdcebfc4 UD |
28 | { |
| 29 | if (fd < 0 || fd2 < 0) | |
| 30 | { | |
| 31 | __set_errno (EBADF); | |
| 32 | return -1; | |
| 33 | } | |
| 34 | ||
| 35 | if (fd == fd2) | |
| 36 | /* No way to check that they are valid. */ | |
| 37 | return fd2; | |
| 38 | ||
| 39 | __set_errno (ENOSYS); | |
| 40 | return -1; | |
| 41 | } | |
| dc70356c TS |
42 | libc_hidden_def (__dup3) |
| 43 | weak_alias (__dup3, dup3) | |
| bdcebfc4 | 44 | stub_warning (dup3) |