_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)