mdm-run - run a command in parallel with mdm-master
mdm-run annotates command as a candidate for parallel execution. If an
mdm-master process is present (i.e., the environment variable
MDM_CMD_SOCK is defined), mdm-run submits command to the mdm-master,
and it exits when the master issues the command to an mdm-slave process
(which may be connected to another terminal) for execution. mdm-sync
runs command in place, but it coordinates with mdm-master to ensure
that executing command does not interfere with commands that are
currently executing in parallel.
If there is no mdm-master process present (i.e., the environment
variable MDM_CMD_SOCK is not defined), both mdm-run and mdm-sync simply
run command as if you entered command all by itself.
These programs are a part of the Middleman System (mdm).
Neither mdm-run nor mdm-sync accepts any options.
If there is no mdm-master process present, the exit status of mdm-run
is the exit status of command. If an mdm-master process is present,
the exit status is 0 if and only if command is successfully issued to
an mdm-slave process for execution.
The exit status of mdm-sync is always the exit status of command.
The mdm system uses the following environment variable for internal
communication, and thus you should not try to set them yourself.
mdm-run uses this environment variable to decide whether a mdm-
master process is present.
See mdm.screen(1) for an example use of mdm-run.