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Add daemon lifecycle subcommands: start, stop, reload, status

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Implement CLI subcommands for managing telemt as a daemon:

- `start [config.toml]` - Start as background daemon (implies --daemon)
- `stop` - Stop running daemon by sending SIGTERM
- `reload` - Reload configuration by sending SIGHUP
- `status` - Check if daemon is running via PID file

Subcommands use the PID file (default /var/run/telemt.pid) to locate
the running daemon. Stop command waits up to 10 seconds for graceful
shutdown. Status cleans up stale PID files automatically.

Updated help text with subcommand documentation and usage examples.
Exit codes follow Unix convention: 0 for success, 1 for not running
or error.

Signed-off-by: Vladimir Krivopalov <argenet@yandex.ru>
This commit is contained in:
Vladimir Krivopalov
2026-03-20 20:50:11 +02:00
committed by Vladimir Krivopalov
parent 39875afbff
commit dc2b4395bd
3 changed files with 289 additions and 5 deletions
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23
src/maestro/helpers.rs
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@@ -128,7 +128,17 @@ pub(crate) fn parse_cli() -> CliArgs {
}
fn print_help() {
eprintln!("Usage: telemt [config.toml] [OPTIONS]");
eprintln!("Usage: telemt [COMMAND] [OPTIONS] [config.toml]");
eprintln!();
eprintln!("Commands:");
eprintln!(" run Run in foreground (default if no command given)");
#[cfg(unix)]
{
eprintln!(" start Start as background daemon");
eprintln!(" stop Stop a running daemon");
eprintln!(" reload Reload configuration (send SIGHUP)");
eprintln!(" status Check if daemon is running");
}
eprintln!();
eprintln!("Options:");
eprintln!(" --data-path <DIR> Set data directory (absolute path; overrides config value)");
@@ -162,6 +172,17 @@ fn print_help() {
eprintln!(" --user <NAME> Username (default: user)");
eprintln!(" --config-dir <DIR> Config directory (default: /etc/telemt)");
eprintln!(" --no-start Don't start the service after install");
#[cfg(unix)]
{
eprintln!();
eprintln!("Examples:");
eprintln!(" telemt config.toml Run in foreground");
eprintln!(" telemt start config.toml Start as daemon");
eprintln!(" telemt start --pid-file /tmp/t.pid Start with custom PID file");
eprintln!(" telemt stop Stop daemon");
eprintln!(" telemt reload Reload configuration");
eprintln!(" telemt status Check daemon status");
}
}
#[cfg(test)]