From be4193108513f02439a211a92fd80e0651f6721b Mon Sep 17 00:00:00 2001 From: Thomas Schwinge Date: Wed, 30 Nov 2011 21:21:45 +0100 Subject: IRC. --- hurd/virtual_file_system/discussion.mdwn | 39 ++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 hurd/virtual_file_system/discussion.mdwn (limited to 'hurd/virtual_file_system') diff --git a/hurd/virtual_file_system/discussion.mdwn b/hurd/virtual_file_system/discussion.mdwn new file mode 100644 index 00000000..9e12d01e --- /dev/null +++ b/hurd/virtual_file_system/discussion.mdwn @@ -0,0 +1,39 @@ +[[!meta copyright="Copyright © 2011 Free Software Foundation, Inc."]] + +[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable +id="license" text="Permission is granted to copy, distribute and/or modify this +document under the terms of the GNU Free Documentation License, Version 1.2 or +any later version published by the Free Software Foundation; with no Invariant +Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license +is included in the section entitled [[GNU Free Documentation +License|/fdl]]."]]"""]] + +[[!tag open_issue_documentation]] + +IRC, freenode, #hurd, 2011-11-12: + + So hurd implements a 'transparent translator' somewhere which + just passes all IO calls to the posix IO I'm used to? (i.e. read, write, + open, close, etc.?) + it's the normal way of operation + glibc's read() doesn't do a system call, it always does an RPC to + the underlying translator + be it ext2fs for /, or your foobarfs for your node + Ok that makes sense. How does one program know which translator + it should refer to though? + the read() call magically knows which process to invoke? + the / translator is always known + and then you ask /'s translator about /home, then /home/you, then + /home/you/foobar + it tells you which other translator tyou have to contact + that's on open + It's a tree! Ok. + the notion of fd is then simply knowing the translator + Right. 'file descriptor' is now 'translator address descriptor' + maybe. + it's glibc which knows about FDs, nothing else knows + yes + actually an RPC port, simply + I want to try out the new RPC mechanism that mach implements + err, which "new" RPC ? + mach's RPCs are very old actually :) -- cgit v1.2.3