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nixos/test-driver: actually use the backdoor message to wait for backdoor

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New EDK2 sets up the backdoor port as a serial console, which feeds the test driver
a bunch of boot logs it can safely ignore. Do so by waiting for the message the
backdoor shell prints before doing anything else.
This commit is contained in:
K900 2023-07-08 20:21:50 +03:00
parent 1abde93ec3
commit 008f9f0cd4
1 changed files with 7 additions and 1 deletions
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8
nixos/lib/test-driver/test_driver/machine.py
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@ -752,7 +752,13 @@ class Machine:
while not shell_ready(timeout_secs=30): while not shell_ready(timeout_secs=30):
self.log("Guest root shell did not produce any data yet...") self.log("Guest root shell did not produce any data yet...")
self.log(self.shell.recv(1024).decode()) while True:
chunk = self.shell.recv(1024)
self.log(f"Guest shell says: {chunk!r}")
# NOTE: for this to work, nothing must be printed after this line!
if b"Spawning backdoor root shell..." in chunk:
break
toc = time.time() toc = time.time()
self.log("connected to guest root shell") self.log("connected to guest root shell")