From 9004fd6e8e716c47f94405d5c64dede815c59e7f Mon Sep 17 00:00:00 2001
From: Alex Plotnick <alex@oxidecomputer.com>
Date: Tue, 11 Aug 2026 20:55:43 +0000
Subject: [PATCH] Use rustyline's termios backend

The default backend rebuilds termios from typed flags, dropping
c_cflag bits nix doesn't model. On illumos that zeroes the baud
rate, and B0 at raw-mode entry hangs up the terminal.
---
 Cargo.lock | 10 ++++++++++
 Cargo.toml |  2 +-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/Cargo.lock b/Cargo.lock
index 14b788f..1c4f3bd 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3945,6 +3945,7 @@ dependencies = [
  "memchr",
  "nix",
  "radix_trie",
+ "termios",
  "unicode-segmentation",
  "unicode-width 0.2.2",
  "utf8parse",
@@ -5042,6 +5043,15 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "termios"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "411c5bf740737c7918b8b1fe232dca4dc9f8e754b8ad5e20966814001ed0ac6b"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "textwrap"
 version = "0.15.2"
diff --git a/Cargo.toml b/Cargo.toml
index 6ba7afe..3cba426 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -43,7 +43,7 @@ rlimit = "0.10"
 rumors = { git = "https://github.com/oxidecomputer/rumors", rev = "66aea68b6578345275de3cf14151c4707345773f" }
 rustix = { version = "1", features = ["fs", "process", "pty", "termios"] }
 rustls = "0.23"
-rustyline = "17"
+rustyline = { version = "17", features = ["termios"] }
 schemars = { version = "0.8", features = ["chrono"] }
 serde = "1"
 serde_json = "1"