11/3/71 SYS TELL (II)
NAME tell -- get file pointer
SYNOPSIS (file descriptor in r0)
sys tell; offset; ptrname / tell = 20.
(value retruned in r0)
DESCRIPTION The file descriptor refers to an open file. The
value returned in r0 is one of:
if ptrname is 0, the value returned is offset;
if ptrname is 1, the value is the current
pointer plus offset;
if ptrname is 2, the value returned is the
number of bytes in the file plus offset.
FILES --
SEE ALSO seek
DIAGNOSTICS The error bit (c-bit) is set if the file descrip-
tor is unknown.
BUGS Tell doesn't work. Complain if you need it.
OWNER ken, dmr