RE: batch-capable zip OS/400 freeware

On Sunday 28 July 2002 1:23 am, Orr, Rod wrote:
[snip]
> I'm not very used to qsh so a couple of questions.
>
> 1. There seems to be no return code from STRQSH command. How do errors
> get trapped. If the qsh nominated command fails does it generate escape
> messages or what? Do I have to overide STDOUT and parse a file etc?

I believe that's the only way, but I'm no QShell expert. If there is a
failure it produces a spoolfile (at least in batch it does) with the
error, but I'm not sure if this is a QShell thing or a JVM thing. You
could redirect stderr on the command itself, but you'd then need to
process an IFS file to find out what happened.

> 2. Is there much overhead in invoking the QSH environment? I ask
> because I may have to invoke it multiple times in a loop (because of
> the 5000 char limit).

There's an overhead, certainly, but I've not tried measuring it. The
report distribution system I mentioned generates around 100 emails, and
the zipping process seems to take just a couple of minutes or so for the
lot (1-2 secs per QSH). That's on a four way 730.

> 3. How did you find the performance of Jar? Is it written in Java?

jar is the Java ARchiver and is a standard component in all JVMs. As such
I presume (but don't know) that it's probably written in C for the target
platform. It seems zippy enough[1]

Regards, Martin
[1] bad pun intended ;)
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