40 lines
1.1 KiB
Python
40 lines
1.1 KiB
Python
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"""
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Gateway runtime status helpers.
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Provides PID-file based detection of whether the gateway daemon is running,
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used by send_message's check_fn to gate availability in the CLI.
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"""
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import os
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from pathlib import Path
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_PID_FILE = Path.home() / ".hermes" / "gateway.pid"
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def write_pid_file() -> None:
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"""Write the current process PID to the gateway PID file."""
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_PID_FILE.parent.mkdir(parents=True, exist_ok=True)
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_PID_FILE.write_text(str(os.getpid()))
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def remove_pid_file() -> None:
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"""Remove the gateway PID file if it exists."""
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try:
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_PID_FILE.unlink(missing_ok=True)
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except Exception:
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pass
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def is_gateway_running() -> bool:
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"""Check if the gateway daemon is currently running."""
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if not _PID_FILE.exists():
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return False
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try:
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pid = int(_PID_FILE.read_text().strip())
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os.kill(pid, 0) # signal 0 = existence check, no actual signal sent
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return True
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except (ValueError, ProcessLookupError, PermissionError):
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# Stale PID file -- process is gone
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remove_pid_file()
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return False
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