//! 执行层错误类型（中文，不含密钥明文）

use std::fmt;

#[derive(Debug)]
pub enum ExecError {
    /// 参数含 shell 元字符等危险输入
    DangerousInput(String),
    /// 参数槽位白名单校验失败
    InvalidSlot(String),
    /// 工作目录越界
    CwdNotAllowed(String),
    /// 进程启动失败
    Spawn(String),
    /// 非零退出码
    NonZeroExit(String),
}

impl fmt::Display for ExecError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            ExecError::DangerousInput(m) => write!(f, "危险输入: {m}"),
            ExecError::InvalidSlot(m) => write!(f, "参数校验失败: {m}"),
            ExecError::CwdNotAllowed(m) => write!(f, "工作目录越界: {m}"),
            ExecError::Spawn(m) => write!(f, "进程启动失败: {m}"),
            ExecError::NonZeroExit(m) => write!(f, "命令非零退出: {m}"),
        }
    }
}

impl std::error::Error for ExecError {}