Added chroot support.

src/main.rs

@@ -3,6 +3,7 @@ use color_eyre::{
     eyre::WrapErr,
 };
 use human_panic::setup_panic;
+use std::os::unix::fs;
 use tracing::{
     Level,
     info,
@@ -10,12 +11,12 @@ use tracing::{
 use tracing_subscriber::FmtSubscriber;
 
 mod chat;
-mod command;
+mod commands;
 mod qna;
 mod setup;
 
-const DEFAULT_INSTRUCT: &'static str =
-"You are a shady, yet helpful IRC bot.  You try to give responses that can
+const DEFAULT_INSTRUCT: &str =
+    "You are a shady, yet helpful IRC bot.  You try to give responses that can
  be sent in a single IRC response according to the specification.";
 
 #[tokio::main]
@@ -36,6 +37,13 @@ async fn main() -> Result<()> {
     let settings = setup::init().await.wrap_err("Failed to initialize.")?;
     let config = settings.config;
 
+    // chroot if applicable.
+    if let Ok(chroot_path) = config.get_string("chroot-dir") {
+        fs::chroot(&chroot_path)
+            .wrap_err_with(|| format!("Failed setting chroot '{}'", chroot_path.to_string()))?;
+        std::env::set_current_dir("/").wrap_err("Couldn't change directory after chroot.")?;
+    }
+
     let handle = qna::new(
         config.get_string("api-key").wrap_err("API missing.")?,
         config
@@ -44,7 +52,9 @@ async fn main() -> Result<()> {
         config
             .get_string("model")
             .wrap_err("model string missing.")?,
-        config.get_string("instruct").unwrap_or_else(|_| DEFAULT_INSTRUCT.to_string()),
+        config
+            .get_string("instruct")
+            .unwrap_or_else(|_| DEFAULT_INSTRUCT.to_string()),
     )
     .wrap_err("Couldn't initialize LLM handle.")?;
     let mut c = chat::new(&config, &handle).await?;

src/setup.rs

@@ -23,6 +23,14 @@ pub(crate) struct Args {
     /// Base URL for the LLM API to use.
     pub(crate) base_url: Option<String>,
 
+    /// Directory to use for chroot (recommended).
+    #[arg(long)]
+    pub(crate) chroot_dir: Option<String>,
+
+    /// Root directory for file based command structure.
+    #[arg(long)]
+    pub(crate) command_dir: Option<String>,
+
     #[arg(long)]
     /// Instructions to the model on how to behave.
     pub(crate) intruct: Option<String>,
@@ -93,6 +101,8 @@ pub async fn init() -> Result<Setup> {
         // but a derive macro could do this a bit better if this becomes too large.
         .set_override_option("api-key", args.api_key.clone())?
         .set_override_option("base-url", args.base_url.clone())?
+        .set_override_option("chroot-dir", args.chroot_dir.clone())?
+        .set_override_option("command-path", args.command_dir.clone())?
         .set_override_option("model", args.model.clone())?
         .set_override_option("instruct", args.model.clone())?
         .set_override_option("channels", args.channels.clone())?