Qprocess arguments problem

eldoradofm

I'm having a problem with arguments.

I want to start an external program like this:
programname -in="path to file with spaces in path"

I tried this:

@process.start("programname -in=""C:\Documents and Settings\test.ext""");@

I get response from program:
Input file 'C:\Documents' doesn't exist!

So i changed it to:

@process.start("programname -in="""C:\Documents and Settings\test.ext"""");@

But then i get the following:
Input file '"C:\Documents and Settings\test.ext"' doesn't exist!

I've searched all over the internet for a solution. How can i make this work?

goetz

Did you try to pass the arguments in a string list?

@
QString progName = "programname";
QStringList arguments;
argument << "-in="C:\Documents and Settings\test.ext"";
process.start(progName, arguments);
@

This should avoid the space based argument parsing, which cries for errors if you have spaces within an argument :)

eldoradofm

Yes i also tried it like that.
But then the program says that i used wrong arguments.
When i change it to:

@
QString progName = "programname";
QStringList arguments;
arguments << "-in="C:\test.ext"";
process.start(progName, arguments);
@

And i move the file to C:\test.ext i get the message:
Input file '"C:\test.ext"' doesn't exist!

goetz

And it does work from the command line?

eldoradofm

Yes when i type from command line: @programname -in="C:\Documents and Settings\test.ext"@
Then it works.
It works with 1: \ and with 2: \.
Somehow i can't post the above line on this forum with 1 \ in it.

It also works with @programname -in="C:/Documents and Settings/test.ext"@ from the command line.

Are there other things i can try to make it working?

eldoradofm

With suggestions from others i came to a working example:
@process.start(""programname "-in=""""C:/Documents and Settings/test.ext""""");@
Now i'm trying to find a working solution for when i use QStringList.

eldoradofm

I can only get it to work like this with QStringlist:
@
QStringList test;
test << ""programname" << "-in="""C:/Documents and Settings/test.ext""""";

QString test2;
test2 = arguments.join(" ");

process.start(test2);
@

But when i use this:
@
QString program = "programname";
QStringList arguments;
arguments << "-in=C:/Documents and Settings/test.ext";
process.start(program,arguments);
@

It doesn't work. I don't know anymore why i have this problems.

But for now i can continue with the single QStringlist that i join in a QString.
If anyone has other suggestions that i can try please let me know.

goetz

The only suggestion is: Use what works for you! There is no need to change a running system.