hpux man page for lseek

lseek(2)							System Calls Manual							  lseek(2)

NAME
       lseek - move read/write file pointer; seek

SYNOPSIS
DESCRIPTION
       sets the file pointer associated with the file descriptor as follows:

	      o  If whence is the pointer is set to offset bytes.

	      o  If whence is the pointer is set to its current location plus offset.

	      o  If whence is the pointer is set to the size of the file plus offset.

       These symbolic constants are defined in

RETURN VALUE
       When completes successfully, it returns an integer, which is the resulting file offset as measured in bytes from the beginning of the file.
       Otherwise, a value of is returned and is set to indicate the error.

       For all files that are not character or block special files, the integer returned on successful completion is non-negative.  For  character
       or  block  special  files that correspond to disk sections larger than 2 gigabytes, a non-negative integer is returned for successful seeks
       beyond 2 gigabytes.  This value is the resulting file offset as measured in bytes from the beginning of the file, when taken as an unsigned
       value.  always indicates an error return, even when encountered on greater than 2 gigabyte disk sections.  The call succeeds for NFS direc-
       tories even if the resulting file offset becomes negative.

ERRORS
       fails and the file offset remains unchanged if one or more of the following is true:

       [EBADF]	      fildes is not an open file descriptor.

       [ESPIPE]       fildes is associated with a pipe, socket, or FIFO.

       [EINVAL]       whence is not one of the supported values.

       [EINVAL]       The resulting file offset would be negative.

       [EINVAL]       The resulting file offset would be a value which cannot be represented correctly in an object of type

WARNINGS
       Some devices are incapable of seeking.  The value of the file offset associated with such a device is undefined.

       Using with a whence of on device special files is not supported and the results are not defined.

SEE ALSO
       creat(2), dup(2), fcntl(2), lseek64(2), open(2), unistd(5).

STANDARDS CONFORMANCE
																	  lseek(2)