On Thu, Jan 29, 2004 at 05:48:51PM +0100, CK wrote:
Any idea how to sort out this : i need to start pd as root (because of parapin) automatically on boot,
I'm not familiar with parapin but if it's /dev/lp* based a simple chmod should do the trick. Is this an external you are using ? which one ?
I programmed the parapin external, which is based on the parapin library; here's an excerpt of its documentation: Programs using Parapin must be running as root when they are initialized. Initialization of the library will fail if the process is owned by any user other than the super-user because Parapin has to request the right to write directly to hardware I/O registers using the ioperm function. The security-conscious programmer is encouraged to drop root privileges using setuid after a successful call to pin_init_user.
I did not program the external securely. Running as root is mandatory (sudo works for this purpose), and chmoding the device would not give root permissions to parapin.
but then there is a patch with some controlls for normal user that i want to run as user. To start another Pd is not a good way.
hmmm .... I guess if you insist on having one pd, started as a user you will have to install it suid and patch the source to allow realtime scheduling _and_ parport access.
I suggess to start your PD application using sudo, with the -nogui option, and program some sort of fullscreen GUI with anything that can communicate with PD. You can use a flash frontend with mozilla in kiosk mode under the ratpoison window manager. The kdm session manager allows to start X automatically at startup. Ming is good to create dynamic flash interfaces.
http://www.akustische-kunst.org/puredata/flash/ http://kiosk.mozdev.org/ http://ratpoison.sf.net/ http://docs.kde.org/en/3.1/kdebase/kdm/ http://www.opaque.net/ming/
I hope this helps
(Gee, thats a very good subject for the next pd meeting in Montréal...)
Marc