After starting a QProcess, it is often useful to be able to refer to the command that was given to start(), e.g. to print error messages. This is especially true if the object is being used asynchronously, because otherwise one has to map the QProcess object to the command string, which is silly.
This could be accomplished by introducing a QProcess member function "QString commandLine() const", which would return the (possibly transformed) command line given to the start() functions.