[Qt-interest] passing multiple args to rsh encapsulated in a QProcess

[Sarvesh Saran]

Hi,

Thanks for the reply. unfortunately your suggestion did not work...it could be because of the nature of the argument..

I will first show the C equivalent of the command which is used in a system command and works fine.

char *buf = "rsh  machine1 \"source /remote/bin/settings.csh\";qhost"

fprintf(stderr,"%d\n",system(buf));

the above works fine..

its QT equivalent would be:

QString str = QString("\"source /remote/bin/settings.csh\";qhost);

args<<"machine1"<<str;

process->start("rsh",args);


this however does not work...

Thanks,
Sarvesh

-----Original Message-----
From: qt-interest-bounces at trolltech.com [mailto:qt-interest-bounces at trolltech.com] On Behalf Of Thiago Macieira
Sent: Wednesday, August 26, 2009 3:32 PM
To: qt-interest at trolltech.com
Subject: Re: [Qt-interest] passing multiple args to rsh encapsulated in a QProcess

Em Quarta-feira 26 Agosto 2009, às 09:00:52, Sarvesh Saran escreveu:
> Hi,
>
> I am trying to invoke RSH In a QProcess and would like to pass
> multiple  commands to RSH ( Linux OS). The following code works:
>
> QProcess *process = new QProcess(this); QStringList args; args
> <<"machine1"<<"ls";
> process->start("rsh",args);
>
> As you can see RSH here is passed only a single command "ls"
>
>
> However this does not seem to work.
>
> args<<"machine1"<<". /mypath/settings.sh"<<";mycommand";
>
> process->start("rsh",args);
>
> (on the command line the above command works fine..i.e. rsh machine1
> "./mypath/settings.sh;mycommand").


The equivalent of shell:
        rsh machine1 "./mypath/settings.sh;mycommand"

is:
        args << "machine1" << "./mypath/settings.sh;mycommand";

What happens is that the double-quotes (") in the shell make most special characters lose their special meaning. What's important for us is that spaces no longer separate arguments and ; no longer terminates the command.

That means the "./mypath/settings.sh;mycommand" argument is passed as a single argument to the process (without the quotes). That's what you need to replicate in QProcess.

--
Thiago Macieira - thiago.macieira (AT) nokia.com
  Senior Product Manager - Nokia, Qt Development Frameworks
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