libnyanpasu/clash-nyanpasu · error · std::io::Error (Other)

{}

Error message

{}

What it means

In the same `sudo` helper, when spawning/waiting on the privileged process itself fails (the `Err(e)` arm of the status match), the underlying error is rewrapped verbatim as an `Other` io::Error with just `e.to_string()` as the message.

Solutions

1. Inspect the message for the underlying spawn error (missing helper, permission denied).
2. Reinstall/repair the app so the privilege-escalation helper is present.
3. Check that the process can spawn executables (security software, seccomp/sandbox policies).
4. Retry; transient spawn failures can be caused by resource exhaustion.

// spawn errors are environmental; retry with backoff
for _ in 0..2 { if sudo(cmd).is_ok() { break; } }

match sudo(cmd) {
    Err(e) if e.kind() == std::io::ErrorKind::Other => {
        log::error!("sudo spawn failed: {e}");
        // surface reinstall guidance to user
    }
    other => other?,
}

When it happens

Trigger: Calling `sudo` when the sudo backend cannot start the child process at all — the helper binary is missing, spawning fails due to permissions or resource limits, or the backend returns an OS-level error.

Common situations: sudo-prompt helper not present/allowed on macOS, Windows UAC service unavailable, PATH issues, or system resource exhaustion preventing process spawn.

Related errors

• exit code: , signal: , output
• child process failed
• {error}
• failed to copy core
• failed to get core version

AI-assisted analysis of libnyanpasu/clash-nyanpasu@f7dbce2997 (2026-09-08). Data as JSON: /api/errors/6e96ad44d62fe4ed. Report an issue: GitHub.

Appendix: source

Thrown at backend/tauri/src/utils/sudo.rs:58

            )])
            .status();
        match status {
            Ok(status) if status.success() => Ok(()),
            Ok(status) => {
                // read the output file
                let output = std::fs::read_to_string(out)
                    .unwrap_or_else(|e| format!("failed to read output file: {}", e));
                Err(std::io::Error::new(
                    std::io::ErrorKind::Other,
                    format!(
                        "exit code: {:?}, signal: {:?}, output: {}",
                        status.code(),
                        status.signal(),
                        output
                    ),
                ))
            }
            Err(e) => Err(std::io::Error::new(
                std::io::ErrorKind::Other,
                e.to_string(),
            )),
        }
    }
}

#[cfg(target_os = "macos")]
pub use macos::sudo;

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