I think a more useful solution would be to engineer FUSE filesystems for various file system formats. It removes the necessity to modify simh or the guest OS.
> On Apr 20, 2016, at 12:42 PM, Ken Cornetet > <ken.corne...@kimballelectronics.com> wrote: > > I think I wasn’t clear on what I meant. > > Simh would have an FTP server built in. In your simh control file, you’d > attach a disk (or tape, or drum) and add an option that would make that block > device available to the FTP server as a certain virtual directory name. A > user id and password would also be specified. > > An FTP client would connect to simh using the specified user/password and do > a “cd” to the virtual directory name as specified in the attach options. The > FTP client could then read, write, and erase files in the filesystem on that > block device file. > > Obviously, simh can’t know how to read/write/erase files for every file > system out there, so we’d need a very simple file system that would be simple > to code for both simh and guest os applications. I like LIF because it is > designed for pretty much exactly this. HP designed it as a way to transfer > files across their various operating systems (and even calculators). > > It wouldn’t have to be LIF – we could design our own from scratch if desired. > But LIF is super simple and a user level utility could be coded up on pretty > much any guest OS (well, any guest OS that allows block level access to > devices). > > > > From: Ken Cornetet > Sent: Wednesday, April 20, 2016 11:43 AM > To: simh@trailing-edge.com <mailto:simh@trailing-edge.com> > Subject: Way out idea for simh > > A common theme on this list is how to get files copied between the host and > the emulated machines. I have a crazy idea for a simh feature to help in that > regard: Add an FTP server to simh that would write to a “universal” file > system on a simh block device file (disk, tape, drum) that the guest OS > would have attached. You could fire up your favorite ftp client and copy > files into and out of this file system. > > Obviously, the guest OS would need to have tools written to read/write this > universal file system, but with a simple enough file system, that wouldn’t be > a huge hurdle. I have to admit, outside of unix and RTE, I have no notion of > how many operating systems that run on simh emulated machines allow direct > disk access. I am assuming there is a way to do it on most all of them. If > not, tape or drum could be an option. > > For this “universal” file system, I nominate Hewlett-Packard’s LIF. It is > simple and well documented. A fixed flat directory at the beginning of the > image, fixed size directory entries, and linear space allocation (no > allocation tables). > > I don’t expect it would be trivial to add an FTP server to simh, but it could > be handy. Just food for thought. > > _______________________________________________ > Simh mailing list > Simh@trailing-edge.com <mailto:Simh@trailing-edge.com> > http://mailman.trailing-edge.com/mailman/listinfo/simh > <http://mailman.trailing-edge.com/mailman/listinfo/simh>
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