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Re: [dsdp-tm-dev] "Run a command" functionality

Can you get the exit value of the command from there? (Sorry, don’t have the source in front of me).


From: dsdp-tm-dev-bounces@xxxxxxxxxxx [mailto:dsdp-tm-dev-bounces@xxxxxxxxxxx] On Behalf Of David McKnight
Sent: Monday, June 20, 2011 8:20 AM
To: Target Management developer discussions
Cc: Target Management developer discussions; dsdp-tm-dev-bounces@xxxxxxxxxxx
Subject: Re: [dsdp-tm-dev] "Run a command" functionality


Hi Vladimer,

I'm not sure whether this will solve all your requirements but you might want to try using SimpleCommandOperation.

SimpleCommandOperation cmdOp = new SimpleCommandOperation(cmdss, remoteFile, false);
cmdOp.runCommand(<cmd>, true);

String line = cmdOp.readLine(true);
while (line != null){
// process line
line = cmdOp.readLine(true);

David McKnight
Phone: 905-413-3902 , T/L: 969-3902
Internet: dmcknigh@xxxxxxxxxx
Mail: D1/YFY/8200/TOR

Inactive hide details for Vladimir Prus ---18/06/2011 05:12:27 AM---Hello, in a few cases in our product, we're interested in jVladimir Prus ---18/06/2011 05:12:27 AM---Hello, in a few cases in our product, we're interested in just running a command remotely,


Vladimir Prus <vladimir@xxxxxxxxxxxxxxxx>


Target Management developer discussions <dsdp-tm-dev@xxxxxxxxxxx>


18/06/2011 05:12 AM


[dsdp-tm-dev] "Run a command" functionality

Sent by:



in a few cases in our product, we're interested in just running a command remotely,
getting its exit status and output. At the same time, it's explicitly not desirable
to show the user any console window with the command output.

RSE provides shell service, which can be used to run a command, however this is
good for interactive use, and has some problems when used to run a single

- The commands see they have a terminal, and starts to behave interactively, like
asking the user some questions, which is bad in our case.
- There's no clear way to obtain command error status. Per Anna's suggestion,
we used

; echo "Exit status is $?"

but assumes such output is not shown by the program, and the last line of program
output ends with newline, that we have a Linux target, and so on.
- In addition to program output, there is output produced when logging in into the
remote system, so we have to use some kludges to filter that out.

It seems to me that it would be best if this complexity (which seems specific to
different connections methods) be incapsualted inside RSE. So, there should be
an API to run a command, which can be implemented:

- Using SSH 'exec' channel for SSH connections
- Using the above "echo" trick for telnet connections
- Using whatever magic is necessary for DStore, or Windows, or other, connection types.

Does this seem to make sense? Shall I file a bug?


Vladimir Prus
CodeSourcery / Mentor Graphics
+7 (812) 677-68-40
dsdp-tm-dev mailing list

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