projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| b168057a | 1 | /* Copyright (C) 1997-2015 Free Software Foundation, Inc. |
| af6f3906 UD |
2 | This file is part of the GNU C Library. |
| 3 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. | |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 41bdb6e2 AJ |
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. | |
| af6f3906 UD |
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 | |
| 41bdb6e2 | 13 | Lesser General Public License for more details. |
| af6f3906 | 14 | |
| 41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
| 59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| af6f3906 UD |
18 | |
| 19 | #include <errno.h> | |
| 088b9917 | 20 | #include <endian.h> |
| af6f3906 | 21 | #include <unistd.h> |
| 0dee6738 | 22 | |
| 6ee8d334 | 23 | #include <sysdep-cancel.h> |
| 36ecfe56 UD |
24 | #include <sys/syscall.h> |
| 25 | ||
| 4b172769 RM |
26 | #ifdef __NR_pread64 /* Newer kernels renamed but it's the same. */ |
| 27 | # ifdef __NR_pread | |
| 28 | # error "__NR_pread and __NR_pread64 both defined???" | |
| 29 | # endif | |
| 30 | # define __NR_pread __NR_pread64 | |
| 31 | #endif | |
| 32 | ||
| af6f3906 | 33 | |
| 6ee8d334 UD |
34 | static ssize_t |
| 35 | do_pread64 (int fd, void *buf, size_t count, off64_t offset) | |
| af6f3906 UD |
36 | { |
| 37 | ssize_t result; | |
| 38 | ||
| a2da1673 | 39 | result = INLINE_SYSCALL (pread, 5, fd, buf, count, |
| ca1cde9e GM |
40 | __LONG_LONG_PAIR ((off_t) (offset >> 32), |
| 41 | (off_t) (offset & 0xffffffff))); | |
| af6f3906 UD |
42 | |
| 43 | return result; | |
| 44 | } | |
| 45 | ||
| 6ee8d334 UD |
46 | |
| 47 | ssize_t | |
| 48 | __libc_pread64 (fd, buf, count, offset) | |
| 49 | int fd; | |
| 50 | void *buf; | |
| 51 | size_t count; | |
| 52 | off64_t offset; | |
| 53 | { | |
| 54 | if (SINGLE_THREAD_P) | |
| 55 | return do_pread64 (fd, buf, count, offset); | |
| 56 | ||
| 57 | int oldtype = LIBC_CANCEL_ASYNC (); | |
| 58 | ||
| 59 | ssize_t result = do_pread64 (fd, buf, count, offset); | |
| 60 | ||
| 61 | LIBC_CANCEL_RESET (oldtype); | |
| 62 | ||
| 63 | return result; | |
| 64 | } | |
| 65 | ||
| a96206f4 | 66 | weak_alias (__libc_pread64, __pread64) |
| 778c59c8 | 67 | weak_alias (__libc_pread64, pread64) |