Using system command in Qt

Question

How can I use a command systemwhere the command is written in QString?

how

QString command="chmod -R 777 /opt/QT/examples/code/TestGUI/Data";    
system(command);

When compiling, I get this error:

cannot convert ‘QString’ to ‘const char*’
  for argument ‘1’ to ‘int system(const char*)’

Can anyone suggest something?

+5

harnek singh May 29 '12 at 12:12

6 answers

Vinicius kamakura · Answer 1 · 2012-05-29T12:52:13+0000

system(qPrintable(command));

Jason b · Answer 2 · 2012-05-29T12:21:14+0000

You need to get the original character array from QString. Here is one way:

system(command.toStdString().c_str());

Ankur Gupta · Answer 3 · 2012-05-29T12:16:41+0000

firescreamer · Answer 4 · 2012-05-29T13:04:03+0000

Ankur Gupta , QProcess ( ):

int QProcess::execute ( const QString & program )

:

QProcess::execute ("chmod -R 777 /opt/QT/examples/code/TestGUI/Data");

Vlad Gordin · Answer 5 · 2012-09-13T14:07:09+0000

, setPermissions QFile

AliS · Answer 6 · 2013-11-15T09:05:42+0000

QString const char*.

UTF8, :

const char* my_command = command.toUtf8().constData() ;
system(my_command);

else, UTF8, :

command.toLatin1().constData() ;
system(my_command);

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