{"record":{"id":"6d20064390486059","repo":"nikivdev/code","slug":"kill-command-exited-with-status","errorCode":null,"errorMessage":"kill command exited with status {}","messagePattern":"kill command exited with status (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"src/daemon.rs","lineNumber":684,"sourceCode":"        // First try to kill the process group (negative PID)\n        // This ensures child processes are also terminated\n        let pgid_kill = Command::new(\"kill\")\n            .arg(format!(\"-{pid}\"))\n            .stderr(std::process::Stdio::null())\n            .status();\n\n        // Also kill the process directly\n        let status = Command::new(\"kill\")\n            .arg(format!(\"{pid}\"))\n            .stderr(std::process::Stdio::null())\n            .status()\n            .context(\"failed to invoke kill command\")?;\n\n        // If either succeeded, we're good\n        if status.success() || pgid_kill.map(|s| s.success()).unwrap_or(false) {\n            return Ok(());\n        }\n        bail!(\n            \"kill command exited with status {}\",\n            status.code().unwrap_or(-1)\n        );\n    }\n\n    #[cfg(windows)]\n    {\n        let status = Command::new(\"taskkill\")\n            .args([\"/PID\", &pid.to_string(), \"/F\", \"/T\"]) // /T kills child processes too\n            .status()\n            .context(\"failed to invoke taskkill\")?;\n        if status.success() {\n            return Ok(());\n        }\n        bail!(\n            \"taskkill exited with status {}\",\n            status.code().unwrap_or(-1)\n        );","sourceCodeStart":666,"sourceCodeEnd":702,"githubUrl":"https://github.com/nikivdev/code/blob/a747e741ae92c09071d0ae946ab48488adcff1ce/src/daemon.rs#L666-L702","documentation":"terminate_process on Unix invokes `kill` (and optionally a process-group kill) on the daemon PID; if neither kill invocation reports success it bails with `kill command exited with status <code>`. This means the OS refused or failed to terminate the process (most often because it no longer exists or the caller lacks permission).","triggerScenarios":"stop_daemon_with_path, start_daemon_inner (restart), or kill_process_on_port calling terminate_process when the target PID is already dead (ESRCH surfaces as non-zero exit), the process belongs to another user, or the PID was recycled by an unrelated process in a different session.","commonSituations":"Stopping a daemon that already crashed; stale PID file pointing at a dead or reused PID; trying to kill a daemon started by another user or under systemd without privileges; container environments lacking CAP_KILL.","solutions":["Check the process still exists (`ps -p <pid>`); delete/refresh the stale PID file and retry.","Re-run with elevated privileges (sudo) if the daemon runs as another user.","Verify ownership: only kill processes you own or via the service manager (`systemctl stop ...`).","Recreate the scenario: restart the daemon normally so stop/restart uses a live PID."],"exampleFix":"// before: blindly trusting PID file\nterminate_process(pid)?;\n// after: verify PID is alive and owned by us first\nif process_alive_and_owned(pid) { terminate_process(pid)?; } else { remove_stale_pidfile(); }","handlingStrategy":"try-catch","validationCode":"// Rust: verify the PID is alive before attempting a kill\nfn pid_alive(pid: i32) -> bool {\n    std::path::Path::new(&format!(\"/proc/{pid}\")).exists()\n}","typeGuard":null,"tryCatchPattern":"match terminate_process(pid) {\n    Ok(()) => println!(\"daemon stopped\"),\n    Err(e) if e.to_string().contains(\"kill command exited\") => {\n        eprintln!(\"Could not kill pid {pid} — it may already be dead or owned by another user; check `ps -p {pid}` and try sudo.\");\n        cleanup_stale_pidfile();\n    }\n    Err(e) => return Err(e),\n}","preventionTips":["Check /proc/<pid> (or `ps -p`) before killing; treat ESRCH as success.","Remove PID files promptly on daemon shutdown to avoid stale PIDs.","Run stop/restart commands under the same user (or a service manager) that started the daemon.","Handle PID reuse by storing the process start time alongside the PID."],"tags":["process-kill","permissions","daemon"],"backgroundTag":"kill-command-failed","analyzedSha":"a747e741ae92c09071d0ae946ab48488adcff1ce","analyzedAt":"2026-09-01T22:43:55.719Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}