[Interest] QProcess to start a process at a higher priority
NoMercy
nomercy at gmail.com
Tue Mar 10 20:27:58 CET 2015
Hello,
I use it like this;
> QProcess *procPort1 = new QProcess(this);
>
> QString cmdPort1 = QString( "cscript C:\\progra~1\\yourpath\\your_vbs.vbs %1 %2 %3 %4" ).arg(arg_var_0).arg(arg_var_1).arg(arg_var_2).arg(arg_var_3);
>
> procPort1->start(cmdPort1);
hope it helps :)
Happy coding,
Emre
On Tue, Mar 10, 2015 at 6:59 PM, Jason Kretzer <Jason at gocodigo.com> wrote:
> One last thing.
>
> I am trying to start the VBS with:
>
> p->startDetached("go.vbs", arguments);
>
> However, this returns false and does not start the vbs. I see that you
> use cscript to start yours, but you do not pass any arguments. How would
> that be accomplished? Basically, in the line above, the arguments is a
> QStringList that I can pass to go.vbs. How would I invoke cscript and pass
> arguments to the vbs?
>
> -Jason
>
> //------------------------------//
> Jason R. Kretzer
> Lead Application Developer
> Jason at gocodigo.com
> //-----------------------------//
>
>
> From: "Jason R. Kretzer" <jason at gocodigo.com>
> Date: Tuesday, March 10, 2015 at 12:02 PM
> To: "Jason R. Kretzer" <jason at gocodigo.com>, NoMercy <nomercy at gmail.com>,
> "interest at qt-project.org" <interest at qt-project.org>
>
> Subject: Re: [Interest] QProcess to start a process at a higher priority
>
> Answered my own question, it appears if I just wrap the arguments in
> chr(34)’s it will retain the integrity of the argument.
>
> Thanks Emre.
>
> -Jason
>
> //------------------------------//
> Jason R. Kretzer
> Lead Application Developer
> Jason at gocodigo.com
> //-----------------------------//
>
>
> From: "Jason R. Kretzer" <jason at gocodigo.com>
> To: NoMercy <nomercy at gmail.com>, "interest at qt-project.org" <
> interest at qt-project.org>
> Subject: Re: [Interest] QProcess to start a process at a higher priority
>
> Emre, thanks so much.
>
> I do indeed have a static number of arguments. Unfortunately, the reason
> they are quoted was because the arguments have spaces in them and
> Wscript.Arguments wants to ignore the quotes :)
>
> -Jason
>
> //------------------------------//
> Jason R. Kretzer
> Lead Application Developer
> Jason at gocodigo.com
> //-----------------------------//
>
>
> From: NoMercy <nomercy at gmail.com>
> Date: Tuesday, March 10, 2015 at 11:15 AM
> To: "Jason R. Kretzer" <jason at gocodigo.com>, "interest at qt-project.org" <
> interest at qt-project.org>
> Subject: Re: [Interest] QProcess to start a process at a higher priority
>
> Hello again,
> for that I have something like this (if you have a static number of
> arguments);
>
> Set WshShell = CreateObject("WScript.Shell")
>>
>> WshShell.currentdirectory = "C:\Program Files\your_app_dir"
>>
>> 'wscript.echo WshShell.currentdirectory
>>
>> WshShell.Run chr(34) & "C:\Program Files\ your_app_dir\your_bat.bat" &
>>> chr(34) & " " & Wscript.Arguments(0) & " " & Wscript.Arguments(1) , 0
>>
>> Set WshShell = Nothing
>>
>>
> Happy Coding
> Emre
>
> On Tue, Mar 10, 2015 at 5:09 PM, Jason Kretzer <Jason at gocodigo.com> wrote:
>
>> Thanks!
>>
>> Honestly, I do not have much experience with Vbscript. In your example
>> below, how would I pass arguments to the your_bat.bat? I have 8 quoted
>> arguments that I need to pass the bat file.
>>
>> I have tried this
>>
>> Dim arg0
>> arg0 = WScript.Arguments.Item(0)
>> WScript.Echo arg0
>> WshShell.Run chr(34) & "C:\Program Files\yourapp\your_bat.bat" & arg0 &
>> chr(34) , 0
>>
>> But that is not quite right. It echos the arg0 fine but I get a “The
>> system cannot find the file specified” when I run that.
>>
>> Thoughts?
>>
>> -Jason
>>
>> //------------------------------//
>> Jason R. Kretzer
>> Lead Application Developer
>> Jason at gocodigo.com
>> //-----------------------------//
>>
>>
>> From: NoMercy <nomercy at gmail.com>
>> Date: Monday, March 9, 2015 at 5:27 AM
>> To: "Jason R. Kretzer" <jason at gocodigo.com>
>> Subject: Re: [Interest] QProcess to start a process at a higher priority
>>
>> Our app uses an ugly method for exactly this reason and I intend to
>> research and find a better solution on this subject when I have time but
>> for the moment we use "cscript.exe /path/to/your/script.vbs"
>> in vbs:
>>
>> Set WshShell = CreateObject("WScript.Shell")
>>>
>>> WshShell.currentdirectory = "C:\Program Files\ yourapp"
>>>
>>> 'wscript.echo WshShell.currentdirectory
>>>
>>> WshShell.Run chr(34) & "C:\Program Files\yourapp\your_bat.bat" & chr(34)
>>>> , 0
>>>
>>> Set WshShell = Nothing
>>>
>>>
>> And if I'm remembering correctly the zero ("0") at the end of line that
>> starts with "WshShell.Run" makes it windowless.
>>
>> Happy coding
>> Emre
>>
>> On Mon, Mar 9, 2015 at 1:53 AM, Jason Kretzer <Jason at gocodigo.com> wrote:
>>
>>> Hello all,
>>>
>>> I am tinkering a bit with QProcess on Windows7. What I would like to be
>>> able to do is to start a process with a “high” priority. My application
>>> spawns multiple processes and I am tinkering with them in order to help
>>> ensure they get their processor time.
>>>
>>> On the command line, I would do this.
>>>
>>> start /high myspawn.exe arg1 arg2 arg3
>>>
>>> Unfortunately one of the requirements is that a DOS window not open to
>>> run it.
>>>
>>> If I start the process like this:
>>>
>>> QString program = “myspawn.exe";
>>> QStringList arguments;
>>>
>>> arguments << “arg1” << “arg2" << “arg3";
>>>
>>> QProcess *p = new QProcess(this);
>>> QTimer::singleShot(30000, this, SLOT(deleteLater()));
>>> qDebug() << "starting mysawn process -- " << p->startDetached(program,
>>> arguments);
>>>
>>> It starts just fine, no DOS window, but at Normal priority.
>>>
>>> I have tried multiple ways using the “start /high…” command inside of
>>> the various ways to execute a command with QProcess, but they always flash
>>> a DOS window.
>>>
>>> I even create a .bat file with the command in it and passed arguments in
>>> with the above code. While it worked, it flashed the DOS window.
>>>
>>> Am I missing something here?
>>>
>>> -Jason
>>>
>>> //------------------------------//
>>> Jason R. Kretzer
>>> Lead Application Developer
>>> Jason at gocodigo.com
>>> //-----------------------------//
>>>
>>>
>>> _______________________________________________
>>> Interest mailing list
>>> Interest at qt-project.org
>>> http://lists.qt-project.org/mailman/listinfo/interest
>>>
>>>
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