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.
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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