mirror of
https://github.com/firestar5683/StarPilot.git
synced 2026-11-12 15:33:45 +08:00
dirwin31
77 lines
2.9 KiB
Python
77 lines
2.9 KiB
Python
"""Temporary AGNOS BlueALSA receiving profile. Invoked as root with a fixed action.
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Only a feature-owned /run drop-in is changed; Bluetooth power, bonds, bluetoothd,
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HFP and the on-disk service definition are untouched. Unknown service commands
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are rejected rather than replaced. The override disappears on reboot.
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"""
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from __future__ import annotations
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import fcntl
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from pathlib import Path
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import subprocess
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import sys
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if __package__:
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from . import bluealsa_runtime
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else:
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import bluealsa_runtime
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DROP_IN = Path('/run/systemd/system/bluealsa.service.d/90-starpilot-phone.conf')
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# BlueALSA is tiny but must drain the Bluetooth socket on time; at nice 0 it competes with driving
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# processes on busy cores and the music chain (nice 10) cannot make up for lost incoming packets.
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LEGACY_CONTENTS = '[Service]\nExecStart=\nExecStart=/usr/bin/bluealsa -p a2dp-source -p a2dp-sink\n'
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CONTENTS = LEGACY_CONTENTS + 'Nice=-5\n'
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def systemctl(*args):
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return subprocess.run(['/usr/bin/systemctl', *args], check=True, capture_output=True, text=True, timeout=15).stdout.strip()
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def configure(action: str, path: Path = DROP_IN, run=systemctl) -> None:
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if action not in ('acquire', 'release'):
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raise ValueError('Unknown profile action')
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previous = path.read_text() if path.exists() else None
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if previous is not None and previous not in (CONTENTS, LEGACY_CONTENTS):
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raise RuntimeError('Phone audio profile override was changed externally')
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bluealsa_runtime.check_owned(path)
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override, _ = bluealsa_runtime.paths(path)
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if action == 'release':
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if previous is not None or override.exists():
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bluealsa_runtime.remove(path)
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path.unlink(missing_ok=True)
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run('daemon-reload')
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run('try-restart', 'bluealsa.service')
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return
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bluealsa_runtime.validate()
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if previous == CONTENTS and override.exists():
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run('start', 'bluealsa.service')
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return
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if previous is None:
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command = run('show', '--property=ExecStart', '--value', 'bluealsa.service')
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if not any(f'argv[]=/usr/bin/bluealsa {profiles} ;' in command for profiles in
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('-p a2dp-source', '-p a2dp-source -p a2dp-sink')):
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raise RuntimeError('Unsupported BlueALSA service configuration; phone audio was not enabled')
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path.parent.mkdir(parents=True, exist_ok=True)
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try:
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# Keep this file byte-for-byte compatible with old commits recovery code.
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path.write_text(CONTENTS)
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bluealsa_runtime.install(path)
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run('daemon-reload')
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run('restart', 'bluealsa.service')
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except Exception:
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bluealsa_runtime.remove(path)
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if previous is None:
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path.unlink(missing_ok=True)
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else:
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path.write_text(previous)
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run('daemon-reload')
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run('try-restart', 'bluealsa.service')
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raise
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if __name__ == '__main__':
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# Serializes recovery and normal shutdown; never takes the adapter's pairing lease.
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with open('/run/starpilot-phone-profile.lock', 'w') as lock:
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fcntl.flock(lock, fcntl.LOCK_EX)
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configure(sys.argv[1])
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