Creating a folder from QML with /bin/sh -c mkdir

lvr123

11/21/23, 12:48 AM

Hi I'm trying to create a folder from QML with a QProcess call:

qproc.start("/bin/sh -c 'mkdir -p /tmp/x'");

It doesn't do anything. Nor does it return any error. From what I read, this syntax should be correct, is it ? Might it be permission issue ? How can check this ?

I tried to run the following one in order to know who was the running user of qml script:

qproc.start(/bin/sh -c 'whoami &> \"/tmp/mlog.txt\"'");

but the output file is not created...

Where should I look at ?

Context: this QML script is a user-extension for the MuseScore application running as AppImage. I have no access to the backend. I have to stay in a pure QML solution.

1 + 3

qml

mkdir

steeldriver

11/21/23, 1:35 AM

It [looks like](https://doc.qt.io/qt-6/qprocess.html#start) the second argument should be a QtStringList i.e. something like `qproc.start("/bin/sh", { "-c", "mkdir -p /tmp/x"})`

steeldriver

11/21/23, 1:38 AM

... your second attempt has some additional issues I think (1) the `&>` redirection is a bashism and (2) the literal quotes

lvr123

11/21/23, 10:00 AM

As I'm in pure QML, a QStringList must be written with `[]`(javascript-style) and not `{}` (which is C#-style). For some reason, in my MuseScore environment `QProcess.start(command, arguments)` returns and error. The key was, as you mentioned, in the quotes (and the `&>` for the second command).

Score:0

Ubuntu

lvr123

11/21/23, 9:56 AM

The key is in the quotes. The two expressions must be written like this, with quotes in that precise order.

qproc.start("/bin/sh -c \"mkdir -p '/tmp/x/'\"");

And

qproc.start("/bin/sh -c \"whoami > /home/vboxuser/Documents/log.txt\"");

+ 0

Elon Musk

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EN: Creating a folder from QML with /bin/sh -c mkdir

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