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Joachim Wiberg
290c03b2b5
Add three SSH-related commands to the operational CLI:
ssh [user <name>] [port <num>] <host>
Connect to a remote device over SSH, running as the
CLI user (not root) by dropping privileges before exec.
set ssh known-hosts <host> <keytype> <pubkey>
Pre-enroll a host public key received out-of-band (e.g.
via email after a factory reset) into ~/.ssh/known_hosts,
avoiding a TOFU prompt on first connect.
no ssh known-hosts <host>
Remove a stale host key entry using ssh-keygen -R, e.g.
after a device factory reset causes a key mismatch.
Tab completion is provided for key types (ssh-ed25519,
ecdsa-sha2-nistp256, etc.) and for known host names/IPs.
A new run_as_user() helper is introduced alongside the existing
run(), factoring out the fork+setuid+execvp pattern used by
infix_shell() so it can be shared across the SSH functions.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>