[p4] Terminal output in p4v tools

[Rick Macdonald]

I must have found this with Google, because I don't know perl, but this 
works for me:

my( $oldHandle );

# Force a flush on STDOUT
$oldHandle = select (STDOUT); # "select" STDOUT and save previously 
selected handle
$| = 1;                       # perform flush after each write to STDOUT
select ($oldHandle);          # restore previously selected handle

...RickM...

Gross, Steve wrote:
> Hi folks. I had an interesting problem that you might find handy: my
> custom tool generates a lot of output (both to stdout and stderr) during
> an execution time of 10+ seconds. However, the p4v terminal window only
> displayed ALL of the output at the END of execution, rather than
> delivering the messages one by one as they occurred.
>
> This had the unfortunate effect of making users wonder whether the
> program was running at all! That is, they would spawn the tool, get an
> empty terminal window, and no output for awhile. Ack!
>
> I found an interesting solution: after every message is delivered (er,
> printed) to stdout or stderr in my tool, I flush the appropriate buffer.
> This works like a charm!
>
> Interesting, huh?
>
> --Steve
>
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