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456b3c08 | 1 | /* Close a range of file descriptors. |
dff8da6b | 2 | Copyright (C) 2021-2024 Free Software Foundation, Inc. |
60744950 AZ |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <https://www.gnu.org/licenses/>. */ | |
18 | ||
456b3c08 AZ |
19 | #include <errno.h> |
20 | #include <not-cancel.h> | |
60744950 AZ |
21 | #include <unistd.h> |
22 | ||
456b3c08 AZ |
23 | /* Close the file descriptors from FIRST up to LAST, inclusive. */ |
24 | int | |
25 | __close_range (unsigned int first, unsigned int last, | |
26 | int flags) | |
60744950 | 27 | { |
456b3c08 AZ |
28 | if (first > last || flags != 0) |
29 | { | |
30 | __set_errno (EINVAL); | |
31 | return -1; | |
32 | } | |
60744950 | 33 | |
456b3c08 AZ |
34 | int maxfd = __getdtablesize (); |
35 | if (maxfd == -1) | |
36 | return -1; | |
60744950 | 37 | |
456b3c08 AZ |
38 | for (int i = first; i <= last && i < maxfd; i++) |
39 | __close_nocancel_nostatus (i); | |
40 | ||
41 | return 0; | |
60744950 | 42 | } |
456b3c08 AZ |
43 | libc_hidden_def (__close_range) |
44 | weak_alias (__close_range, close_range) |