Date: Sat, 17 Sep 2011 19:55:00 -0700 From: Julian Elischer <julian@freebsd.org> To: Gonzalo <gonzalo.a.r@gmail.com> Cc: Tijl Coosemans <tijl@coosemans.org>, freebsd-threads@freebsd.org Subject: Re: thread impersonation Message-ID: <4E755D84.7080103@freebsd.org> In-Reply-To: <CA%2B02-EEOXcuNwjFMMS-6_Z0MB3kG2SAg5SOFq2KUx1wG0Tn75w@mail.gmail.com> References: <CA%2B02-EGUyKuCeRVoy36u2Ubnu7JJxvXtFzp3FzCFEGdNd-DGgQ@mail.gmail.com> <201109171520.09423.tijl@coosemans.org> <CA%2B02-EEOXcuNwjFMMS-6_Z0MB3kG2SAg5SOFq2KUx1wG0Tn75w@mail.gmail.com>
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On 9/17/11 11:51 AM, Gonzalo wrote: > So, as a imagined, is not possible a thread impersonation on FreeBSD? > > 2011/9/17 Tijl Coosemans<tijl@coosemans.org> I'm not quite sure what you are trying to achieve, and why. each thread DOES have its own credentials but the kernel/unix spec defines them to all be the same user.. It MIGHT be possible for a thread spawned before a seteuid() to keep some of the credentials of the prior ID but I haven't looked.. Nor do I know how that would be used.. usually UID tests are made on the PROCESS credentials and not the thread credentials (which exist for other reasons). >> On Monday 12 September 2011 21:31:03 Gonzalo wrote: >>> I'm new in freeBSD and I'm looking a way to impersonate threads in >> FreeBSD. >>> In Linux I did that with setfsuid, but that only work in linux and is not >>> portable :( >> There's seteuid(2) or setuid(2) which are portable. They change the uid of >> the entire process though, not per thread. >> >>> I saw that in FreeBSD there is Jails, that could work? Is possible to >> create >>> a Jail for every new thread and "impersonate the Jail"? Maybe I'm saying >>> things without sense :( >> A jail is a form of virtualisation. It's not related to what you're trying >> to do. You can read more about jails in the handbook: >> http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/jails-intro.html >> > _______________________________________________ > freebsd-threads@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-threads > To unsubscribe, send any mail to "freebsd-threads-unsubscribe@freebsd.org" >
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