Execute Shell Script with button function

[outer]

hi,

I have created a little GUI with QT Designer/Creator. Now I want to execute a Shell Script by pushing a button. I have already connected the button to a methode. In the method I now have to write the code for starting the Shell Script.

I tried it with the QProcess class:

QString program = "/bin/sh";
QString shellFile = "Shell.sh";
QProcess *myProcess = new QProcess(this);
myProcess->setStandardInputFile(shellFile);
myProcess->start(program);

--> No result. I can compile without problems, but when clicking the button nothing happens.

Furthermore I tried it with the system function (stdlib.h class):

QString File = MainFile + "/constant/polyMesh";
std::string File2 = File.toStdString();
system(File2.c_str());

--> result: when clicking the button I get the error message:

sh: /home/mathic/ert/constant/polyMesh: Permission denied

I guess I haven't the rights to execute the process in the second case, but I don't know how to handle this.

Can someone tell me how to execute the Shell Script? :)

greetings
outer

[Albatross]

Assuming the file is yours, all (I think) you need to do is open a terminal and type this:
chmod +x yourfile
...where yourfile is... your file. This'll allow running of the file. Good luck! ;)

By the way... why are you mixing C++ and shell scripts? :/

-Albatross

[outer]

I have written a GUI and now I have to start a Shell Script by using one button of the GUI. Therefore I mix c++ and shell scripts.

Another question:

Because the shellscript I want to run is always created new when using the GUI I need to change the standard file rights for new created files/directories. I know I have to change the file /etc/profile by using the terminal, but I don know how to do this. The file rights for new files are 0002 as standard (proofed with unmask), so I thought changing it to 0777 would be the best. Do you or does anybody know how to do this?

[Albatross]

Wait wait wait. Your question is on how to ensure that the file you're creating will have permission to run, correct? If so, there there are a few C functions that could help you with that.

Here's a link to a documentation page on the sys/stat.h header. I think you'd be most interested in the chmod function listed there, near the bottom. :)
http://pubs.opengroup.org/onlinepubs/7908799/xsh/sysstat.h.html

At the end of the day, I doubt you'll have to mess around with anything in the /etc/ directory.

-Albatross

[outer]

Thx for the answer - the given documentation is very interesting though I have to handle my source code now in another way, because my tutor wants so. Now I will have to run the ShellScript, not by running the ShellScript itself, but by running the commands of the ShellScript in my source code. But I'm already working on that.