From: dot@dotat.at (Tony Finch)
Subject: [TUHS] Portals in 4.4 BSD
Date: Fri, 29 Apr 2016 12:15:02 +0100 [thread overview]
Message-ID: <alpine.DEB.2.11.1604291108210.12603@grey.csi.cam.ac.uk> (raw)
In-Reply-To: <1461920291.2703061.593186393.3DD04F16@webmail.messagingengine.com>
Ramakrishnan Muthukrishnan <ram at rkrishnan.org> wrote:
>
> I read with a lot of interest, an old Usenix paper by the late Richard
> Stevens on a system called "Portals": [...]
> Wondering if this survived in any existing, so called "modern" Unix.
A descendent of the original code is still present in DragonFlyBSD:
http://gitweb.dragonflybsd.org/dragonfly.git/tree/HEAD:/sys/vfs/portal
http://gitweb.dragonflybsd.org/dragonfly.git/tree/HEAD:/sbin/mount_portal
The facility still exists in NetBSD but it has been reimplemented on top
of puffs, the Pass-to-Userspace Framework File System development
interface.
http://netbsd.gw.com/cgi-bin/man-cgi?mount_portal
It survived in FreeBSD for a long time, but eventually was removed in 2012
rather than being made multiprocessor-safe.
https://github.com/freebsd/freebsd/commit/efcca33ac515c354e18135425794400ea32406a8
It also got removed from OpenBSD in 2011.
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/sbin/mount_portal/Attic/mount_portal.8
Tony.
--
f.anthony.n.finch <dot at dotat.at> http://dotat.at/ - I xn--zr8h punycode
Trafalgar: Northerly or northeasterly 4 or 5, increasing 6 or 7 later, perhaps
gale 8 in northeast. Moderate or rough, but slight or moderate in southeast.
Fair. Good.
next prev parent reply other threads:[~2016-04-29 11:15 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-29 8:58 Ramakrishnan Muthukrishnan
2016-04-29 11:15 ` Tony Finch [this message]
2016-05-01 1:28 ` Ramakrishnan Muthukrishnan
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