> Yet: is there a source control system behind it? > Would it be possible to check out directly from there?
for the bell-labs distribution, the filesystem itself keeps a daily record of the source tree. you can access it with 9fs sourcesdump and the daily state of sources will be in /n/sourcesdump. > If there is none, could it be that this contributes to the lack of > popularity 9front and 9legacy both use mercurial as their revision control systems. 9legacy keeps a mirror of the bell-labs distribution in mercurial as well if that suits your needs. 9front's repo: http://code.google.com/p/plan9front 9legacy's various repositories and mirrors: https://hg.9grid.fr/ > and to the fragmentation of Plan9 (9front, 9atom, 9legacy, > PlanB, other plans...)? the reason for the different distributions is really no different than the motivation for the different bsd or linux distributions: they each have their own goals and purpose.