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

       Note: for information about the llseek(3) library function, see lseek64(3).

       The  _llseek()  system  call repositions the offset of the open file description associated with the file
       descriptor fd to the value

              (offset_high << 32) | offset_low

       This new offset is a byte offset 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.

       The new file offset is returned in the argument result.  The  type loff_t is a 64-bit signed type.

       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  5.10  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/.

Linux                                              2020-12-21                                          LLSEEK(2)