Re: [JSch-users] JSCH .53 return empty strings executing commands on ubuntu

[Offer B. <off...@gm...>]

but read should block until you get data or you reach EOF... it shouldn't
return -1 if there might be anymore data...
as -1 (End Of File) was returned that means that no more data is available.

anyway i will give it a try and report back.

On Wed, May 18, 2016 at 12:48 PM, Tobia Conforto <tob...@gr...>
wrote:

> Then I believe it's a race condition.
>
> You are looping until connIn.read() returns -1, but that only means that
> *for now* there is no more data to read. It doesn't mean that the remote
> command is done. So if the remote server takes a few millisecond more to
> run the command, your Java program will get a -1 from read() and exit the
> loop, instead of waiting for any more data.
>
> I suggest you study the examples provided with JSch, starting from the one
> about Exec[1], where you will see the only condition that can ever leave
> the main while(true) is basically: channel.isClosed() && ! in.available()>0
>
> Tobia
>
> [1] http://www.jcraft.com/jsch/examples/Exec.java.html
>
> On 18 May 2016, at 11:38, Offer Baruch <off...@gm...> wrote:
> > basically i get into a read loop:
> > while (!endOfIn) {
> >                 i = connIn.read(tmp, 0, tempBufLen);
> >                 if (i < 0) {
> >                     endOfIn = true;
> >                     break;
> >                 }
> > ...
> > }
> > although this is surrounded by try and catch there is no exception
> raised...
> > i simply returns -1.
> > the command is in fact get run on the host... i just loose the output of
> the command.
>
>