mirror of
https://github.com/st3fan/ewm.git
synced 2026-10-25 17:02:19 +00:00
Stefan ArentzandClaude Fable 5
3c7fe06776
The telnet echo suppression was reactive — the server only announced WILL ECHO / WILL SGA after the client sent an IAC first. But a classic telnet client sits in line-mode-with-local-echo and waits for the server to negotiate, so the announcement never went out, the client kept echoing locally, and every line appeared twice (its echo plus the machine's own authentic echo). A telnet server that wants remote echo has to offer it proactively on connect. The new --tty-telnet flag (implies --tty) does exactly that: it writes WILL ECHO + WILL SGA before the banner and marks the filter active so the reactive path doesn't double-announce. Bare --tty stays byte-clean for local terminals and nc (kickoff option B); the reactive fallback still helps a plain --tty client that does negotiate first. The systemd @.service switches its ExecStart to --tty-telnet. The growing session-behavior params (throttle, banner, telnet) fold into a TtyConfig struct. Tests: proactive announce leads the stream (before the banner) and doesn't double-announce when the client then sends its own IAC; the flag implies --tty and parses. Verified live: `ewm one --tty-telnet | xxd` shows FF FB 01 FF FB 03 then the prompt. Docs: scripts/systemd/README.md and notes/APPLE1.md explain proactive --tty-telnet vs byte-clean --tty, with troubleshooting for the double-echo and the nc negotiation bytes. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
33 lines
1.2 KiB
Desktop File
33 lines
1.2 KiB
Desktop File
# One telnet connection = one Apple 1 (see ewm-one.socket). The
|
|
# emulator does no networking: systemd hands the accepted connection
|
|
# over as stdin/stdout and `ewm one --tty` speaks bytes — keyboard in,
|
|
# display out, Meta-R (or telnet's `send brk`) is the RESET button.
|
|
#
|
|
# The sandbox can be tight because the binary needs no filesystem at
|
|
# all: the machine configs and ROM images are embedded. Swap the
|
|
# --config for builtin:replica1 (or a config path, if you loosen the
|
|
# sandbox) to serve a different machine.
|
|
|
|
[Unit]
|
|
Description=Apple 1 for %i
|
|
|
|
[Service]
|
|
# Install banner.txt (next to these units) wherever you like — it is
|
|
# readable under ProtectSystem=strict from /usr or /etc.
|
|
# --tty-telnet (implies --tty) negotiates server-side echo on connect, so
|
|
# a telnet client stops echoing locally and each line appears once.
|
|
ExecStart=/usr/local/bin/ewm one --config builtin:apple1 --tty-telnet --tty-banner /usr/local/share/ewm/banner.txt
|
|
StandardInput=socket
|
|
StandardOutput=socket
|
|
StandardError=journal
|
|
DynamicUser=yes
|
|
NoNewPrivileges=yes
|
|
ProtectSystem=strict
|
|
ProtectHome=yes
|
|
PrivateTmp=yes
|
|
PrivateDevices=yes
|
|
RestrictAddressFamilies=AF_UNIX
|
|
MemoryMax=64M
|
|
# Abandoned sessions do not get to keep a 1 MHz loop forever.
|
|
RuntimeMaxSec=4h
|