projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| d4697bc9 | 1 | /* Copyright (C) 1997-2014 Free Software Foundation, Inc. |
| fd0aa339 RM |
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 | |
| 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 | |
| 59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| fd0aa339 RM |
18 | |
| 19 | #include <assert.h> | |
| 20 | #include <errno.h> | |
| 21 | #include <unistd.h> | |
| 22 | #include <endian.h> | |
| 23 | ||
| 24 | #include <sysdep-cancel.h> | |
| 25 | #include <sys/syscall.h> | |
| fd0aa339 RM |
26 | |
| 27 | #include <kernel-features.h> | |
| 28 | ||
| 29 | #ifdef __NR_pread64 /* Newer kernels renamed but it's the same. */ | |
| 30 | # ifdef __NR_pread | |
| 31 | # error "__NR_pread and __NR_pread64 both defined???" | |
| 32 | # endif | |
| 33 | # define __NR_pread __NR_pread64 | |
| 34 | #endif | |
| 35 | ||
| fd0aa339 RM |
36 | |
| 37 | ssize_t | |
| 38 | __libc_pread (fd, buf, count, offset) | |
| 39 | int fd; | |
| 40 | void *buf; | |
| 41 | size_t count; | |
| 42 | off_t offset; | |
| 43 | { | |
| 44 | ssize_t result; | |
| 45 | ||
| 46 | if (SINGLE_THREAD_P) | |
| 47 | { | |
| a2da1673 | 48 | result = INLINE_SYSCALL (pread, 6, fd, buf, count, 0, |
| fd0aa339 | 49 | __LONG_LONG_PAIR (offset >> 31, offset)); |
| fd0aa339 RM |
50 | return result; |
| 51 | } | |
| 52 | ||
| 53 | int oldtype = LIBC_CANCEL_ASYNC (); | |
| 54 | ||
| a2da1673 | 55 | result = INLINE_SYSCALL (pread, 6, fd, buf, count, 0, |
| fd0aa339 | 56 | __LONG_LONG_PAIR (offset >> 31, offset)); |
| fd0aa339 RM |
57 | |
| 58 | LIBC_CANCEL_RESET (oldtype); | |
| 59 | ||
| 60 | return result; | |
| 61 | } | |
| 62 | ||
| 63 | strong_alias (__libc_pread, __pread) | |
| 64 | weak_alias (__libc_pread, pread) |