On Fri Dec 31 10, Erik Trulsson wrote: > On Fri, Dec 31, 2010 at 07:00:58PM +0000, Alexander Best wrote: > > [snip] > > > another thought: running 'reboot' instead of 'shutdown -r now' *can* cause > > harm to the system, because an important rc.shutdown script wasn't executed. > > however running 'shutdown -r now' in single-user mode e.g. will cause a few > > sterr warnings; however it *cannot* cause any harm. > > Oh, yes, it can! (And I have been burnt by it once, after which I got > very careful about not using 'shutdown -r now' from single user mode.) > > Take a look at /etc/rc.d/mixer > At shutdown it saves the current state of the soundcard mixer values > into a file and at start it restores the mixer values from that file. > If you boot into single user mode the start function will of course not > be executed leaving the mixer values at their default values. If you > then use 'shutdown' these default values are what will be saved, > overwriting whatever values had been saved before, while if you had > instead had used 'reboot' the old saved values would have been left > untouched. > If you never change the mixer values from their defaukt you won't notice > anything, but otherwise it might take a while to figure out why the > sound is at the 'wrong' volume. > > This is one example I have found where bad things can happen if you use > 'shutdown' when you should have used 'reboot'. I am fairly sure that > there are other instances that I just haven't run into (yet.)
that's a very good argument and in fact i remember to have also once been bitten by the 'mixer' case. so after a some more thoughts: just leave it the way it is. it would be nice to have two commands which would do 'shutdown -r now' and 'shutdown -h now', but i can't think of a name: slowboot/slowhalt? ;) cheers. alex > > > > > -- > <Insert your favourite quote here.> > Erik Trulsson > ertr1...@student.uu.se -- a13x _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
