HP 3000 Manuals HP 3000 Manuals
Using DSLINE and REMOTE Within Programs
Both the DSLINE and REMOTE commands can be executed within a program
using the COMMAND intrinsic. You can set up environment attributes, log
on remote sessions, and issue remote commands from within a program. For
the format of the COMMAND intrinsic, refer to the MPE XL Intrinsics
Reference Manual.
NS3000/XL maintains separate default environments for each process within
a job or session. A DSLINE or REMOTE command that explicitly specifies
an environment ID must be issued from the process to set up its default
environment. Subsequent DSLINE or REMOTE commands issued from the
process may then use (or change) the process default environment. For
example, suppose an application has two processes that set up remote
sessions on different nodes. These processes could execute the following
command sequences using the COMMAND intrinsic:
Process 1
DSLINE NODE1 {sets default environment for process 1}
REMOTE HELLO USER1.ACCT1 {uses default environment NODE1}
Process 2
DSLINE NODE2 {sets default environment for process 2}
REMOTE HELLO USER2.ACCT2 {uses default environment NODE2}
Because NS3000/XL maintains separate default environments for each of
these processes, they can execute concurrently with no problems of
confusion between the default environments.
DSLINE commands for the same environment can be issued from several
different processes within a job or session. Attributes defined by the
DSLINE commands take effect for all processes within the job or session.
For example, if a DSLINE from one process specifies the COMP option, the
COMP attribute is set for all processes using the environment.
NS3000/XL keeps track of each process that issues a DSLINE command for an
environment. The environment will not be deleted until all the processes
have issued DSLINE;CLOSE commands. If any process terminates without
issuing the DSLINE;CLOSE, one will be implicitly performed for the
environment.
Only environments defined by DSLINE or REMOTE commands within a process
will be displayed by generic DSLINE commands. For example, if you issue
a DSLINE @;SHOW command from a process, only those environments defined
within the process will be displayed.
Several processes within a job or session can issue REMOTE commands to
the same remote session. However, this practice is not advised, since
the commands will be unpredictably interleaved depending on the order of
execution of the processes. Also, if one process is already executing a
REMOTE command to a remote session, a REMOTE command to the same remote
session from another process will fail.