Xref: utzoo comp.unix.questions:6283 comp.unix.wizards:7407
Path: utzoo!utgpu!water!watmath!clyde!rutgers!im4u!ut-sally!utastro!bigtex!james
From: james@bigtex.uucp (James Van Artsdalen)
Newsgroups: comp.unix.questions,comp.unix.wizards
Subject: Re: mkdir and access(2)
Keywords: access(2), permissions, setuid/setgid
Message-ID: <1412@bigtex.uucp>
Date: 27 Mar 88 23:40:14 GMT
References: <59@vsi.UUCP> <1056@stratus.UUCP> <70@vsi.UUCP> <305@wsccs.UUCP> <368@wsccs.UUCP> <10811@mimsy.UUCP> <4190@chinet.UUCP>
Reply-To: james@bigtex.UUCP (James Van Artsdalen)
Distribution: comp
Organization: F.B.N. Software, Austin TX
Lines: 12

IN article <4190@chinet.UUCP>, les@chinet.UUCP (Leslie Mikesell) wrote:
> Cpio uses system(mkdir) which gives the directory to the real
> user which happens to be the one who originally started the process
> (even in SysVr3 where it doesn't have to!).

/bin/mkdir on my SysVr3 system isn't suid to anything.  Hence I assume it
works by creating directories via mkdir(2) and then giving them away to the
real uid and gid.  I don't think much would break if you replaced /bin/mkdir
with one that didn't give away the resulting directory.
-- 
James R. Van Artsdalen    ...!uunet!utastro!bigtex!james     "Live Free or Die"
Home: 512-346-2444 Work: 328-0282; 110 Wild Basin Rd. Ste #230, Austin TX 78746