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3944c61b ST |
1 | /* Read block from given position in file without changing file pointer. |
2 | Hurd version. | |
2b778ceb | 3 | Copyright (C) 2001-2021 Free Software Foundation, Inc. |
3944c61b ST |
4 | This file is part of the GNU C Library. |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Lesser General Public | |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
10 | ||
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public | |
17 | License along with the GNU C Library; if not, see | |
18 | <https://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include <errno.h> | |
21 | #include <unistd.h> | |
22 | #include <hurd/fd.h> | |
23 | #include <not-cancel.h> | |
24 | ||
25 | ssize_t | |
26 | __pread64_nocancel (int fd, void *buf, size_t nbytes, off64_t offset) | |
27 | { | |
28 | error_t err; | |
29 | if (offset < 0) | |
30 | err = EINVAL; | |
31 | else | |
32 | err = HURD_FD_USE (fd, _hurd_fd_read (descriptor, buf, &nbytes, offset)); | |
33 | return err ? __hurd_dfail (fd, err) : nbytes; | |
34 | } | |
35 | libc_hidden_weak (__pread64_nocancel) |