LLSEEK(2)                 (2020-12-21)                  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
          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 sup-
          port 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.

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     LLSEEK(2)                 (2020-12-21)                  LLSEEK(2)

     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/.

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