_llseek(2) -- Linux man page
NAME
_llseek - reposition read/write file offset
SYNOPSIS
#include <unistd.h>
#include <linux/unistd.h>
_syscall5(int, _llseek, uint, fd, ulong, hi, ulong, lo, loff_t *, res, uint, wh);
int _llseek(unsigned int fd, unsigned long offset_high,
unsigned long offset_low, loff_t *result, unsigned int whence);
DESCRIPTION
The
_llseek
function repositions the offset of the file descriptor
fd
to
(offset_high<<32) | offset_low
bytes relative to the beginning of the file, the current position in the file,
or the end of the file, depending on whether
whence
is
SEEK_SET,
SEEK_CUR,
or
SEEK_END,
respectively.
It returns the resulting file position in the argument
result.
RETURN VALUE
Upon successful completion,
_llseek
returns 0. Otherwise, a value of -1 is returned and
errno
is set to indicate the error.
ERRORS
- EBADF
-
fd
is not an open file descriptor.
- EINVAL
-
whence
is invalid.
- EFAULT
-
Problem with copying results to user space.
CONFORMING TO
This function is Linux-specific, and should not be used in programs
intended to be portable.
SEE ALSO
lseek(2)
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