warden: you stumbled over a classic BSD (group inherited from dir) vs ATT (inherited from process' effective group) difference. POSIX allows allows either.

SunOS 3.5? 4.0? devised the "ATT default, BSD with setgid bit" trick to cater for both worlds. Note that a dir-setgid gets inherited to new subdirs, too.

Time passed, and linux's ext2 brought these rules: a mount option ("grpid or bsdgroups / nogrpid or sysvgroups") decides which regime is used, and an dir-setgid bit toggles to *the other* regime. (By default, it behaved exactly like the SunOS ufs.)

I couldn't find an equivalent zfs mount property with a quick look at man.omnios.org/zfs but MAYBE "aclmode=" or ACLs themselves are the key here. I don't have a clue about ACLs.

warden: "[sccs] get xxx" == "co -u xxx", "get -e xxx" == "co -l xxx". One of these would be your next step. An "sccs create" instead of

"enter" would have implied the "get".

tux0r: I'm not a developer and surely not entitled to judge version control systems... but I agree with you. My feel is that Git is a real mess: I still have to know a developer who has a clear view about how to use it! :S

neitzel: thanks for the deep explanation on setgid question. I didn't notice that flag was inherited by subdirs: this alleviates my discomfort! :)

neitzel: thanks for the help on SCCS, but "sccs create -o test.conf" returns me "ERROR [SCCS/s.test.conf]: No sid prior to cutoff date-time (ge23)", and leaves a checked out ",test.conf" file in current dir. I expected it would leave a "test.conf" file in current dir.