On Sat, Jun 2, 2012 at 1:45 AM, William Hubbs <w.d.hubbs@xxxxxxxxx> wrote: > currently udev does not have a way to restart itself. This would be a > useful feature, because we could then use this command when we upgrade > or downgrade udev on user's systems so that the most current version of > udev is always running. > > One of gentoo's developers did suggest a patch quite a while back, but > some how it got lost in the shuffel. This patch will not apply now, but > it gives the impression that something like this could be added very > easily [1]. > > Thoughts anyone? We do not want daemons to re-execute themselves. It's far more complicated than usually expected, and in most cases it should be avoided. The problem of interruption-free upgrades is in most cases solved with systemd's socket activation. But I don't think any distribution uses that possibility when they upgrade udev today, but they easily could, all the things are there to make it work. Udev should not re-execute itself, but stopped, installed, and restarted. If you want fancy upgrade setups, use an init system that supports that properly while keeping things simple, and which allows interruption-free restarts by keeping the sockets open. Don't hack up daemons with half-baken things; it's *really* hard to get right. Thanks, Kay -- To unsubscribe from this list: send the line "unsubscribe linux-hotplug" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
