On Wed, 30 Aug 2000, Cooper wrote: > Thanks for clearing up the permanent lockfile idea. It's totally clear > to me how it works now. > As you noted, the power-down-at-the-wrong-time problem can hurt this > approach severely unless, like Fred Cohen suggested, the reading of the > passwd file is done via a special function which checks for the > resulting old passwd file if the new one doesn't appear in time or ever. > While probably a working solution, I think it's *WAY* too much effort > since there are probably a great many apps around that access passwd > directly for reading. see lib/util_file.c in the SAMBA_TNG branch (http://samba.org/cvs.html or http://samba.org/cgi-bin/cvsweb/samba/source/lib/util_file.c) we have a function startpwfile_race_condition_avoid() which may be what you are looking for.
