cmdSrv - Command Server
cmdSrv is the Command Server program. It runs on one or more remote nodes
where it accepts and executes commands on behalf of client programs.
An easy to use API is provided for use by client programs for sending
commands to cmdSrv.
Accelerator Operator Help.
The Server is supported on unix and linux. The api is supported on unix/linux and vms.
Getting the api to work on Windows should be pretty easy, but it hasn't
been tested yet on that platform.
Command Server, SNS EPICS Meeting, Nov, 2000 (ppt
*NOTE: For security reasons, some of the links below are only accessible from within SLAC*.
There is a connection between your scp (or vms standalone program or unix/linux
program) and the cmdSrv program running on a remote unix/linux node. You can
send cmdSrv several types of commands and it will execute them for you
and return a reply message containing status. For example, you can push
a button on the SCP to start an EPICS dm display. The button-push causes
a command to be sent to cmdSrv telling it to start dm for you. Then, a
reply is returned and the status is printed on your scp messages window.
Troubleshooting user displays, etc
How to show all unix/linux processes from the
VMS command line.
System Administrator and Programmer Documentation.
cmdSrv is a tcp/ip server (running on unix/linux). It waits for clients
to make connections and send request packets. For each request packet,
it forks a child process and executes the command contained in the packet.
It returns a reply message containing command status to the client and
closes the connection. The supported commands include:
cmdSrv clients (programs that connect to it from other nodes), can run
on any machine. Initially, the SLAC Control Program (SCP) and standalone
programs on the main VMS server nodes are the clients.
EXECute an X-application (e.g. cmlog -u -f filename).
EXESCR. Execute a unix/linux script (e.g. csarch 0 2 filename).
SHOW all active children.
KILL all children for a given display (head).
Read the control files into memory (REFRESH).
How to make and run the cmdSrv server
on UNIX/LINUX at SLAC(including where the scripts are kept)
How to restart cmdSrv
How cmdSrv gets started at boot time.
How static load balancing works.
How to allow unlimited invocations for a given class.
How to do the setup for SCP and standalone VMS clients.
How to find Unix/Linux hosts for cmdSrv classes, and some useful tools.
How to write Unix/Linux scripts that are invoked from cmdSrv (CS Scripts).
How to add a new cmdSrv request to a SCP panel.
How to write and run VMS
standalone clients and execute multiple scripts from vms at SLAC.
How to write and run a non-slc-control-system client at SLAC.
How to add a new Unix/Linux cmdSrv host.
Archiver Application support.
Troubleshooting, Diagnostics, and Where the Web Documentation pages are kept.
to Controls Software page.