Guardian Procedure Calls Reference Manual (G06.25+)

Guardian Procedure Calls (C)
Guardian Procedure Calls Reference Manual—522629-013
3-131
CONTROL Procedure
Table 3-5. CONTROL Operations 2 Through 27 (page1of3)
Operation Description Description of <param>
2 Write end of file on unstructured disk or magnetic
tape (if disk, write access is required).
A write end of file (EOF) to an unstructured disk file
sets EOF to point to the relative byte address
indicated by the next-record pointer and writes the
new EOF setting in the file label on disk.
If this new EOF setting is out of bounds, EOF is set
to the last possible position.
None
3 Magnetic tape, rewind and unload, do not wait for
completion.
None
4 Magnetic tape, take off line, do not wait for
completion (treated as operation 3 for 5106 Tri-
Density Tape Drive).
Not supported for 5130, 5160, 5170, and 5180 tape
drives.
None
5 Magnetic tape, rewind leave on line, do not wait for
completion.
None
6 Magnetic tape, rewind, leave on line, wait for
completion.
None
7 Magnetic tape, space forward files. number of files {0:255}
8 Magnetic tape, space backward files. number of files {0:255}
9 Magnetic tape, space forward records. number of records
{0:255}
10 Magnetic tape, space backward records. number of records
{0:255}
11 Terminal or serial-connected line printer, wait for
modem connect.
None
12 Terminal or serial-connected line printer,
disconnect the modem (that is, hang up).
None
13 Issue an SNA CHASE request. SNAX exception
response mode must be enabled to use operation
13.
None
17 Terminal or serial-connected line printer, enable
connection and initiate call to remote DTE in X.25
network.
None
20 Disk, purge data (write access is required). None