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qtappimage

application cannot get the running AppImage path

In my application, sometimes I need to find out the path of the application executable. I use QApplication::applicationFilePath() and it works fine. But when I distribute my application as AppImage on Linux, this breaks. It returns the path where the running AppImage was mounted, e.g. /tmp/.mount_MyAppxyzabc/MyApp. But I would need to get the path of the AppImage itself, e.g. /home/vlad/MyApp/MyApp.AppImage. Is this possible to obtain from inside the running application?

Solution

  • I quickly found the answer and I will leave it here for others. At least for AppImages deployed by linuxdeployqt (not sure about other AppImages), the path to the appimage is in environment variable $APPIMAGE.

    So in my code I use: QString appImagePath = QProcessEnvironment::systemEnvironment().value(QStringLiteral("APPIMAGE"));

    The returned string however ends with path separator '/' so I need to remove it.