From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.org/gmane.linux.lib.musl.general/2858 Path: news.gmane.org!not-for-mail From: Rich Felker Newsgroups: gmane.linux.lib.musl.general Subject: Re: shadow.h Date: Wed, 27 Feb 2013 11:54:08 -0500 Message-ID: <20130227165408.GJ20323@brightrain.aerifal.cx> References: <20130226233542.GG20323@brightrain.aerifal.cx> Reply-To: musl@lists.openwall.com NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: ger.gmane.org 1361984061 11211 80.91.229.3 (27 Feb 2013 16:54:21 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 27 Feb 2013 16:54:21 +0000 (UTC) To: musl@lists.openwall.com Original-X-From: musl-return-2859-gllmg-musl=m.gmane.org@lists.openwall.com Wed Feb 27 17:54:45 2013 Return-path: Envelope-to: gllmg-musl@plane.gmane.org Original-Received: from mother.openwall.net ([195.42.179.200]) by plane.gmane.org with smtp (Exim 4.69) (envelope-from ) id 1UAkHC-0006VD-F7 for gllmg-musl@plane.gmane.org; Wed, 27 Feb 2013 17:54:42 +0100 Original-Received: (qmail 32719 invoked by uid 550); 27 Feb 2013 16:54:21 -0000 Mailing-List: contact musl-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: Original-Received: (qmail 32711 invoked from network); 27 Feb 2013 16:54:21 -0000 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Xref: news.gmane.org gmane.linux.lib.musl.general:2858 Archived-At: On Wed, Feb 27, 2013 at 10:09:18AM +0100, Daniel Cegiełka wrote: > 2013/2/27 Rich Felker : > > On Tue, Feb 26, 2013 at 11:54:58PM +0100, Daniel Cegiełka wrote: > > >> Error relocating /lib/security/pam_unix.so: putspent: symbol not found > >> Error relocating /lib/security/pam_unix.so: fgetspent: symbol not found > >> Error relocating /lib/security/pam_unix.so: putpwent: symbol not found > > > > These have been discussed before and I believe the intent is to add > > them (they're simple fprintf wrappers, if I remember correctly), > > ....or can be removed from shadow.h. > > > but > > be aware that pam_unix.so's support for writing to the password > > database assumes a certain form and will break things badly if the > > user is using tcb shadow. It might also mess up the shadow file if it > > depends on being able to iterate all entries in the shadow file; I'm > > not sure if that works or not. > > > > These are issues that need more discussion... > > I prefer tcb, but the current implementation in musl isn't as > functional as owl's (privilege separation): Can you explain this better? I don't think the code in libc has anything to do with privilege separation model used. It only *reads* the tcb shadow data; it doesn't write anything, and it doesn't depend on any particular permissions model for the data except that it be readable by whichever user is doing authenticating. Rich