Question

I am using Qt 4.7 installed on Ubuntu 10.04 ….
I can’t create a qt file inside a location other than the current directory “.”

This code works well:

QFile file("data.txt");
if (!file.open(QIODevice::Append))
{
    qDebug("ERROR WHILE OPENING THE FILE TO APPEND Data");
    return ;
}

but this code fails (I think because of the permissions):

QFile file("/var/lib/mysql/testdb/data.txt");
if (!file.open(QIODevice::Append))
{
    qDebug("ERROR WHILE OPENING THE FILE TO APPEND Data");
    return ;
}

So, how can I solve this problem and give the program permissions to create the file wherever at the file system??

Answer 1

You solve this quickly in one of these ways:

• Run as root (this is a big no-no)
• As root, change the permissions of the directory you need, chmod /the/dir o+rwx – this lets everyone write to the directory.
• As root, change the owner of the directory you need, chown myuser /the/dir – this lets your user write to the directory.

You solve this correctly by sticking to directories that your current user can access – permissions are there for a reason.