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glibc/sysdeps/unix/sysv/linux/llseek.c
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/* Long-long seek operation. | |
Copyright (C) 1996-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <errno.h> | |
#include <sys/types.h> | |
#include <sysdep.h> | |
#include <sys/syscall.h> | |
/* Seek to OFFSET on FD, starting from WHENCE. */ | |
extern loff_t __llseek (int fd, loff_t offset, int whence); | |
loff_t | |
__llseek (int fd, loff_t offset, int whence) | |
{ | |
loff_t retval; | |
return (loff_t) (INLINE_SYSCALL (_llseek, 5, fd, (off_t) (offset >> 32), | |
(off_t) (offset & 0xffffffff), | |
&retval, whence) ?: retval); | |
} | |
weak_alias (__llseek, llseek) | |
strong_alias (__llseek, __libc_lseek64) | |
strong_alias (__llseek, __lseek64) | |
weak_alias (__llseek, lseek64) | |
/* llseek doesn't have a prototype. Since the second parameter is a | |
64bit type, this results in wrong behaviour if no prototype is | |
provided. */ | |
link_warning (llseek, "\ | |
the `llseek' function may be dangerous; use `lseek64' instead.") |