_llseek(2) - Linux man page

Name

_llseek - reposition read/write file offset

Synopsis

#include <sys/types.h>#include <unistd.h>
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 open file associated with 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.
EFAULT: Problem with copying results to user space.
EINVAL: whence is invalid.

Conforming to

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

Notes

Glibc does not provide a wrapper for this system call; call it using syscall(2).

Referenced By

syscalls(2)