=over

=item sysseek FILEHANDLE,POSITION,WHENCE

Sets FILEHANDLE's system position using the system call lseek(2).  It
bypasses stdio, so mixing this with reads (other than C<sysread>),
C<print>, C<write>, C<seek>, C<tell>, or C<eof> may cause confusion.
FILEHANDLE may be an expression whose value gives the name of the
filehandle.  The values for WHENCE are C<0> to set the new position to
POSITION, C<1> to set the it to the current position plus POSITION,
and C<2> to set it to EOF plus POSITION (typically negative).  For
WHENCE, you may also use the constants C<SEEK_SET>, C<SEEK_CUR>, and
C<SEEK_END> (start of the file, current position, end of the file)
from the Fcntl module.

Returns the new position, or the undefined value on failure.  A position
of zero is returned as the string C<"0 but true">; thus C<sysseek> returns
true on success and false on failure, yet you can still easily determine
the new position.

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