Function find_ssh_forward_pid

crates/openshell-core/src/forward.rs:51–65

Find the PID of a backgrounded SSH forward by searching for the matching SSH process. Falls back to `pgrep` since SSH `-f` forks a new process whose PID we cannot capture directly.

(sandbox_id: &str, port: u16)

/// SSH process.  Falls back to `pgrep` since SSH `-f` forks a new process
/// whose PID we cannot capture directly.
pub fn find_ssh_forward_pid(sandbox_id: &str, port: u16) -> Option<u32> {
    // Use pgrep only as a broad process source. The command line still needs a
    // second exact check before the PID can be tracked or signaled, otherwise a
    // requested port such as 80 can substring-match an existing 8080 forward.
    let pattern = "ssh-proxy";
    let output = Command::new("pgrep").arg("-f").arg(pattern).output().ok()?;
    let stdout = String::from_utf8_lossy(&output.stdout);
    // pgrep may return multiple PIDs; scan from newest to oldest and return
    // the first one that still passes the exact command-line validation.
    stdout
        .lines()
        .rev()
        .filter_map(|l| l.trim().parse::<u32>().ok())
        .find(|pid| pid_matches_openshell_ssh_forward(*pid, port, Some(sandbox_id)))
}

/// Record read from a forward PID file.
pub struct ForwardPidRecord {