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System Calls - Manual Reference Pages  - LLSEEK (2)

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_llseek - reposition read/write file offset

CONTENTS

Synopsis
Description
Errors

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#include <unistd.h> 


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#include <sys/types.h> 


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#include <linux/unistd.h> 


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#include <errno.h> 



_syscall5(int, _llseek, unsigned int, fd, unsigned long, hi, 

          unsigned long, lo, loff_t *, res, unsigned int, wh) 
         /* Using syscall(2) may be preferable; see intro(2) */



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 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.

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.
EFAULT	Problem with copying results to user space.
EINVAL	whence is invalid.

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

lseek(2), lseek64(3) or go to Top of page |  Section 2 |  Main Man Index.