projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| b168057a | 1 | /* Copyright (C) 2007-2015 Free Software Foundation, Inc. |
| a95a608f 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/>. */ | |
| a95a608f UD |
17 | |
| 18 | #include <fcntl.h> | |
| 19 | #include <kernel-features.h> | |
| 20 | #include <sysdep.h> | |
| 21 | ||
| 22 | extern int __posix_fallocate64_l64 (int fd, __off64_t offset, __off64_t len); | |
| 23 | #define __posix_fallocate64_l64 static internal_fallocate64 | |
| 24 | #include <sysdeps/posix/posix_fallocate64.c> | |
| 25 | #undef __posix_fallocate64_l64 | |
| 26 | ||
| 27 | #if !defined __ASSUME_FALLOCATE && defined __NR_fallocate | |
| 28 | /* Defined in posix_fallocate.c. */ | |
| 29 | extern int __have_fallocate attribute_hidden; | |
| 30 | #endif | |
| 31 | ||
| 32 | ||
| 33 | /* Reserve storage for the data of the file associated with FD. */ | |
| 34 | int | |
| 35 | __posix_fallocate64_l64 (int fd, __off64_t offset, __off64_t len) | |
| 36 | { | |
| 37 | #ifdef __NR_fallocate | |
| 38 | # ifndef __ASSUME_FALLOCATE | |
| a1ffb40e | 39 | if (__glibc_likely (__have_fallocate >= 0)) |
| a95a608f UD |
40 | # endif |
| 41 | { | |
| 42 | INTERNAL_SYSCALL_DECL (err); | |
| 43 | int res = INTERNAL_SYSCALL (fallocate, err, 6, fd, 0, | |
| 44 | __LONG_LONG_PAIR ((long int) (offset >> 32), | |
| 45 | (long int) offset), | |
| 46 | __LONG_LONG_PAIR ((long int) (len >> 32), | |
| 47 | (long int) len)); | |
| 48 | ||
| 49 | if (! INTERNAL_SYSCALL_ERROR_P (res, err)) | |
| 50 | return 0; | |
| 51 | ||
| 52 | # ifndef __ASSUME_FALLOCATE | |
| a1ffb40e | 53 | if (__glibc_unlikely (INTERNAL_SYSCALL_ERRNO (res, err) == ENOSYS)) |
| a95a608f UD |
54 | __have_fallocate = -1; |
| 55 | else | |
| 56 | # endif | |
| 57 | if (INTERNAL_SYSCALL_ERRNO (res, err) != EOPNOTSUPP) | |
| 58 | return INTERNAL_SYSCALL_ERRNO (res, err); | |
| 59 | } | |
| 60 | #endif | |
| 61 | ||
| 62 | return internal_fallocate64 (fd, offset, len); | |
| 63 | } |