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dntask - Online in the Cloud

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This is the command dntask that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

NAME


dntask - Execute VMS command procedures

SYNOPSIS


dntask [options] command-procedure
Options:
[-biVh] [-t timeout]

DESCRIPTION


dntask runs command procedures on a remote VMS system.
It takes advantage of the ability of the TASK object in DECnet to execute an arbitrary
command procedure located in the users' login directory. The remote command procedure
should output to SYS$NET rather than SYS$OUTPUT and (if interactive) read it's input also
from SYS$NET.
The VMS equivalent of the (non-interactive version) command would be

TYPE node::"TASK=command-procedure"

For some example command procedures see the tasks directory of the source distribution.
show_system.com is a non-interactive task that simply displays the output of the VMS "SHOW
SYSTEM" command on standard output. interactive.com is an interactive task that allows
you to enter DCL commands to be executed on the host VMS system. Be careful which commands
you enter because they will expect input to come from the network connection, for instance
programs that do screen orientated input or output will almost certainly not work.
Task names can be up to 16 characters in length because that's the limit on DECnet object
names.

OPTIONS


-b Send the output in binary mode. By default the output from the DECnet task is
assumed to be records. This option sends the data "as is" so you can put commands
like BACKUP in the task and backup to your Linux box.

-i Interact with the command procedure. The command procedure must be written to be
interactive by reading from and writing to SYS$NET. Specifying -i for a non-
interactive command procedure will cause dntask to time-out waiting for input. Not
specifying -i for an interactive command procedure will cause it to exit
prematurely at the VMS end.

-t timeout
Specifies the timeout in seconds for interactive command procedures. If no input
has been received from either standard input or the VMS end in this time then
dntask will exit. The default is 60 seconds. If the value 0 is given then dntask
will wait forever (or until you kill it).

-T connect timeout
Specifies the maximum amount of time the command will wait to establish a
connection with the remote node. a 0 here will cause it to wait forever. The
default is 60 seconds

-h -? Displays help for using the command.

-V Show the version of the tools package that dntask comes from.

NOTES


The command procedure that you write MUST ALWAYS write something to SYS$NET or you will
get a "connection refused" message. This is a limitation with DECnet objects.
eg. If you write a task to start a remote DECterm it would look something like this:

$ remnode=f$element(0, ":", "''f$trnlnm("sys$rem_node")'")
$ set display/create/node='remnode'
$ create/term/detach
$ def/nolog sys$output sys$net
$ write sys$output "DECterm started on ''remnode'"
$ exit

The "write" command near the end is essential.

EXAMPLES


dntask 'myvax::show_system'

dndir -i 'tramp"christine pjc123"::interactive'

dndir -i 'tramp"christine -"::interactive'

Specifying "-" in the password field will prompt for the password.

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