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Manual Reference Pages  - LLSEEK (2)

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_llseek - reposition read/write file offset

CONTENTS

Synopsis
Description
Errors

#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);

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.

Upon successful completion, _llseek returns 0. Otherwise, a value of -1 is returned and errno is set to indicate the error.

EBADF	fd is not an open file descriptor.
EINVAL	whence is invalid.
EFAULT	Problem with copying results to user space.

This function is Linux-specific, and should not be used in programs intended to be portable.

lseek(2)

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