Mastodawn

Martin Boller

1d ago

@ryanc @AMS @chaos Neat, thanks.

Make

🍁23h ago

@ryanc @AMS @chaos I'm probably missing something, but yeah working with serial TTY's feels more clumsy than it should. I tend to just use `screen`, but it is a weird program.

Rudi (ryjelsum)17h ago

@pawv @ryanc i've found tio to be a wonderful and under-known program for doing serial stuff with more modern setups (i don't think this comes close to 'replacing' what OP made by any means though, layering SSH over it has some really compelling applications)

@pawv @ryanc @AMS @chaos also, GNU screen’s baudrate detection is indeed wonky.

If I know the baudrate, I tend to just run cu(1) in a normal screen tab. Has to get the size (80×24 usually) right, though…

chaos ΘΔ& (it/he)22h ago

@ryanc could this work for sftp as well?

22h ago

@chaos Yes, it'll handle ssh/scp/port forwarding/rsync/git/etc.

Andrew 21h ago

@ryanc @AMS @chaos Awesome! this has always bothered me. now I only have to remember how to exit ssh

21h ago

@cinebox @AMS @chaos ~ .

@ryanc @cinebox @AMS @chaos on a new line (perhaps press Enter+~+.).

If you’re already in an ssh connection, you need to escape it by doubling (tripling, …) the tilde.

Christian Berger DECT 2763 20h ago

@ryanc @AMS @chaos Fascinating, it's not something I'd ever have asked for, but thinking about it, it solves so many actual problems. It was one of those wonderful pieces that enable quite a lot of possibilities.

แอท-ทริด 20h ago

@ryanc oh delicious, i love this!

Irenes (many)19h ago

@ryanc @AMS @chaos huhhhhhhh. neat. if we did things that way we could use scp instead of our current workflow, which uses xmodem.

Irenes (many)19h ago

@ryanc @AMS @chaos (we don't trust our own LAN, so we have a workflow for bringing up new machines using the serial port)

แอท-ทริด 18h ago

@ireneista @ryanc "zero trust begins at home", interesting! i aspire to that ideal, sometimes.

Irenes (many)15h ago

@astrid @ryanc we figure if we don't learn how to do it ourselves, we can't teach anyone else to do it

0xC0DEC0DE07EA 7h ago

@ireneista @ryanc @AMS @chaos huh, could one write a UEFI boot loader that uses serial comms to get the kernel/initrd, etc.

Irenes (many)6h ago

@c0dec0dec0de @ryanc @AMS @chaos in principle, sure

@ryanc @AMS @chaos oh!

That’s also useful to ssh into a libvirt console, isn’t it?

I’ll have to play with this.

@ryanc @AMS @chaos mind that there are current attempts to reduce the network size of 127/8 and AFAIHH FreeBSD already implements this.

execing sshd in inetd mode instead of connecting to a running one could also be interesting…

12h ago

@mirabilos @AMS @chaos Yeah, I considered sshd -i, but that would have required environment manipulation. setenv() needs malloc, which ugetty doesn't otherwise use. Handling the identification string also requires reading it to detect it, then replaying it to sshd. This could be done by forking, replaying the string, then replacing the file descriptors (I think), but the socket method feels cleaner.

mirabilos 12h ago

@ryanc @AMS @chaos ah, that is annoying, of course.

Can you MSG_PEEK on a serial port? Then you could indeed just exec.

12h ago

@mirabilos @AMS @chaos I don't believe so, as a serial port is not a socket.

mirabilos 12h ago

@ryanc @AMS @chaos might still have 15 bytes buffered or so…

Rogan Dawes 11h ago

@ryanc @AMS @chaos this is excellent, thank you!

I wanted to run ssh over Bluetooth Serial Port Profile (I have a JDY-31 dongle wired to the serial console of my device), and couldn’t figure out how to bodge it together. This looks like it should do the trick!

10h ago

@RoganDawes @AMS @chaos Yup, should work. Though for something wireless, you may want to run SSH over PPP so that it doesn't die the first time a packet gets dropped.

Andrej Shadura 11h ago

@ryanc it should also watch for ESC-ESC and run a local BBS 🙂

@AMS @chaos

Tobias 8h ago

@ryanc @AMS @chaos This is nice.