Sadly, that won't work. Both deamons (MM and mine) are started as root. As far as I know exclusive lock has no power against rooted lock acquire. And there is no chance not to run my daemon not as root in due to architecture and interfaces.
2013/6/8 Dan Williams <[email protected]> > On Fri, 2013-06-07 at 17:43 +0400, Dmitry Ivanyushin wrote: > > I am working with git version of MM and Ubuntu 12.04. > > > > I have three different physical serial (RS232) ports and they are not > > USB-to-serial. Now MM probes all of them. I want MM to automatically > detect > > the port the modem is connected to but there're another devices > controlled > > by another daemon. > > > > If there were lock files, my daemon wouldn't probe the ports which are > > locked by MM and vice-versa. > > ModemManager does not use lockfiles as there are various well-understood > problems with them. It does, however use TIOCEXCL which any other > program using doing serial stuff should probably be doing too. Doing it > through the ioctl means there are no stale lock files left if something > crashes and no need to write stuff out to random places. > > Dan > > > > > 2013/6/7 Aleksander Morgado <[email protected]> > > > > > > > > > I have several serial ports in my system but also I have a daemon > that > > > > is responsible for communication with several devices connected to > those > > > > serial ports. This daemon runs as root. However when MM starts it > tries > > > > to find modem via writing to all serial ports registered in the > system. > > > > That operation break protocols of these devices. > > > > > > > > I am thinking of adding support of lock-files to MM. Is it good to > add > > > > such support in mm-manager.c to test locks, in mm-serial-port to > acquire > > > > and release those locks? > > > > > > > > > > What MM version is this? MM shouldn't be probing platform serial > (RS232) > > > ports by default, unless they are explicitly white-listed. For USB > > > devices exposing ttys which aren't modems, we can blacklist them in our > > > udev rules. Would that help? > > > > > > -- > > > Aleksander > > > >
_______________________________________________ networkmanager-list mailing list [email protected] https://mail.gnome.org/mailman/listinfo/networkmanager-list
