From: erik quanstrom <quanstro@quanstro.net>
To: 9fans@9fans.net
Subject: Re: [9fans] Passing a file descriptor between processes
Date: Fri, 5 Nov 2010 06:58:33 -0400 [thread overview]
Message-ID: <3c5bbf46c1bea0e36235f391b63b969f@plug.quanstro.net> (raw)
In-Reply-To: <20101105102946.GA12171@shutemov.name>
On Fri Nov 5 06:32:55 EDT 2010, kirill@shutemov.name wrote:
> One of the ugliest interface in Unix is passing a file descriptor between
> processes [1]. Does Plan9 provide any mechanism for it?
>
> [1] http://book.chinaunix.net/special/ebook/addisonWesley/APUE2/0201433079/ch17lev1sec4.html
there is no mechanism similar to sending fds over a socket.
the two ways of file descriptor sharing are via
(a) rfork(2); and
(b) srv(3)
rfork (optionally) allows a process to share a file descriptor
table with a child process. srv allows a process to post a file
descriptor by a given name in /srv. the normal file operations
apply on that file. in particular, it must be opened
before use.
- erik
next prev parent reply other threads:[~2010-11-05 10:58 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-05 10:29 Kirill A. Shutemov
2010-11-05 10:57 ` Lucio De Re
2010-11-05 10:58 ` erik quanstrom [this message]
2010-11-05 11:03 ` roger peppe
2010-11-05 11:41 ` erik quanstrom
2010-11-05 12:16 ` Venkatesh Srinivas
2010-11-05 12:21 ` erik quanstrom
2010-11-05 21:40 ` Skip Tavakkolian
2010-11-05 12:27 ` Lucio De Re
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