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llseek(2)


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);

   Note: There is no glibc wrapper for this system call; see NOTES.

DESCRIPTION

   The  _llseek()  function  repositions  the  offset  of  the  open  file
   description associated with the file descriptor fd to (offset_high<<32)
   |  offset_low  bytes relative to the beginning of the file, the current
   file offset, 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.

   This system call exists on various 32-bit platforms to support  seeking
   to large file offsets.

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.  To invoke it
   directly, use syscall(2).   However,  you  probably  want  to  use  the
   lseek(2) wrapper function instead.

SEE ALSO

   lseek(2), open(2), lseek64(3)

COLOPHON

   This  page  is  part of release 4.09 of the Linux man-pages project.  A
   description of the project, information about reporting bugs,  and  the
   latest     version     of     this    page,    can    be    found    at
   https://www.kernel.org/doc/man-pages/.



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