rstart - a sample implementation of a Remote Start client
rstart [-c context] [-g] [-l username] [-v] hostname command args...
This option specifies the context in which the command is to be
run. A context specifies a general environment the program is to
be run in. The details of this environment are host-specific; the
intent is that the client need not know how the environment must be
configured. If omitted, the context defaults to X. This should be
suitable for running X programs from the host's "usual" X installa-
-g Interprets command as a generic command, as discussed in the proto-
col document. This is intended to allow common applications to be
invoked without knowing what they are called on the remote system.
Currently, the only generic commands defined are Terminal, LoadMon-
itor, ListContexts, and ListGenericCommands.
This option is passed to the underlying rsh; it requests that the
command be run as the specified user.
-v This option requests that rstart be verbose in its operation.
Without this option, rstart discards output from the remote's
rstart helper, and directs the rstart helper to detach the program
from the rsh connection used to start it. With this option,
responses from the helper are displayed and the resulting program
is not detached from the connection.
The rstart command is a simple implementation of a Remote Start client as
defined in A Flexible Remote Execution Protocol Based on rsh. It uses rsh
as its underlying remote execution mechanism.
This is a trivial implementation. Far more sophisticated implementations
are possible and should be developed.
Error handling is nonexistent. Without -v, error reports from the remote
are discarded silently. With -v, error reports are displayed.
The $DISPLAY environment variable is passed. If it starts with a colon,
the local hostname is prepended. The local domain name should be appended
to unqualified host names, but is not.
The $SESSION_MANAGER environment variable should be passed, but is not.
X11 authority information is passed for the current display.
ICE authority information should be passed, but is not. It is not com-
pletely clear how rstart should select what ICE authority information to
Even without -v, the sample rstart helper will leave a shell waiting for
the program to complete. This causes no real harm and consumes relatively
few resources, but if it is undesirable it can be avoided by explicitly
specifying the "exec" command to the shell, for example,
rstart somehost exec xterm
This is obviously dependent on the command interpreter being used on the
remote system; the example given will work for the Bourne and C shells.
rstartd(1X), rsh(1), A Flexible Remote Execution Protocol Based on rsh
Jordan Brown, Quarterdeck Office Systems