Date: Mon, 28 Oct 2019 18:31:27 -0300 From: Matias Fonzo <selk@...gora.org> To: musl@...ts.openwall.com Subject: Re: [PATCH] remaining steps for time64 switchover Hi Laurent, Thanks for the explanation and to give more details about it. :-) El 2019-10-27 20:27, Laurent Bercot escribió: > > There is a run-time requirement for s6, but it's not an absolute one: > the utmps-utmpd and utmps-wtmpd programs simply rely on an interface > provided by s6-ipcserver(d). If you can provide the same interface, > you can do without s6. > > utmps-utmpd and utmps-wtmpd expect: > - to be launched via an inetd-like listening on the configured Unix > domain socket, with stdin reading from the client and stdout writing > to the client. > - some environment variables: > * PROTO must be set to IPC. > * IPCREMOTEEUID must be set to the effective uid of the client. > * IPCREMOTEEGID must be set to the effective gid of the client. > Those last two are obtained on Linux via a struct ucred and the > SO_PEERCRED option to getsockopt(). You can't fake that, it's the > very reason why utmps is secure. > > Of course, you could also package s6 in Dragora. If you already have > a perp supervision tree, you don't even have to run a s6 one. On the > other hand, that's a risky proposition, because you might end up liking > it and wanting to use it more. %-) > > -- > Laurent
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