On Fri, 05.11.10 17:11, Robert Schwebel (r.schwe...@pengutronix.de) wrote: > > On Tue, Oct 26, 2010 at 12:26:04AM +0200, Lennart Poettering wrote: > > Sorry for the delayed reply. Needed to think a bit about this. > > > > Your patch would break running "systemd --system --test" to verify the > > systemd setup as normal user, since that second instance would fight > > for the same socket as the main (PID 1) instance, and this hence would > > break. > > > > Note that we do not support booting a real system with systemd on PID > > != 1. The primary reason for that is that we need the SIGCHLD signals > > properly, and we only get those as PID 1. Early systemd versions > > supported a mode where we didn't rely on those signals. However, we > > removed that after a while, since I didn't see much benefit in this > > mode and I was unable and unwilling to keep this mode working and do > > the necessary testing. > > Hmm, I'm trying to get systemd running with ptxdist, which means that I > have a system which is totally untested with systemd until now. So my > attempt was to run the system with init=/bin/sh first, then have the > possibility to test things manually, which turned out to be really > helpful, especially because it makes it possible to start systemd with > strace, in order to find out why it doesn't work (mostly because there > have been missing libraries on the system which was downsized a little > bit too much) :-)
If you boot with "init=/bin/sh", then you should be able to exec systemd just fine with "exec /bin/systemd". You can always attach strace to a running process with "strace -p" > So for system bringup, it would be really helpful to have the test mode. There's debug logging, which you can enable with "systemd.log_level=debug systemd.log_target=kmsg" on the kernel cmd line. There's also "systemd --test --log-level=debug --system" which you can use to make systemd calculate the initial transaction it would execute if booted normally and then exit. Anything else you specifically need? Lennart -- Lennart Poettering - Red Hat, Inc. _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
