| 1 | /* Linux lseek implementation, 64 bits off_t. |
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| 2 | Copyright (C) 2016-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library. If not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <unistd.h> |
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| 20 | #include <stdint.h> |
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| 21 | #include <sys/types.h> |
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| 22 | #include <sysdep.h> |
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| 23 | #include <errno.h> |
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| 24 | #include <shlib-compat.h> |
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| 25 | |
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| 26 | off64_t |
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| 27 | __lseek64 (int fd, off64_t offset, int whence) |
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| 28 | { |
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| 29 | #ifdef __NR_llseek |
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| 30 | # define __NR__llseek __NR_llseek |
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| 31 | #endif |
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| 32 | |
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| 33 | #ifdef __NR__llseek |
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| 34 | loff_t res; |
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| 35 | int rc = INLINE_SYSCALL_CALL (_llseek, fd, |
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| 36 | (long) (((uint64_t) (offset)) >> 32), |
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| 37 | (long) offset, &res, whence); |
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| 38 | return rc ?: res; |
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| 39 | #else |
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| 40 | return INLINE_SYSCALL_CALL (lseek, fd, offset, whence); |
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| 41 | #endif |
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| 42 | } |
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| 43 | |
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| 44 | #ifdef __OFF_T_MATCHES_OFF64_T |
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| 45 | weak_alias (__lseek64, lseek) |
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| 46 | weak_alias (__lseek64, __lseek) |
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| 47 | strong_alias (__lseek64, __libc_lseek) |
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| 48 | libc_hidden_def (__lseek) |
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| 49 | #endif |
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| 50 | |
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| 51 | strong_alias (__lseek64, __libc_lseek64) |
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| 52 | weak_alias (__lseek64, lseek64) |
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| 53 | |
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| 54 | #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_28) |
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| 55 | compat_symbol (libc, __lseek64, llseek, GLIBC_2_0); |
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| 56 | #endif |
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| 57 | |
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| 58 | #if !IS_IN(rtld) && OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_1, GLIBC_2_2) |
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| 59 | compat_symbol (libc, __lseek64, lseek64, GLIBC_2_2); |
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| 60 | #endif |
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| 61 | |
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