From 87ce0f648bf6b468d779c911bec902e21f2bbc6b Mon Sep 17 00:00:00 2001
From: Valentin Haudiquet <valentin.haudiquet@canonical.com>
Date: Tue, 13 Jan 2026 09:58:16 +0100
Subject: [PATCH] deb: create special device nodes inside chroot

---
 src/deb/ephemeral.rs | 55 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/src/deb/ephemeral.rs b/src/deb/ephemeral.rs
index a307fd0..f4f3c5d 100644
--- a/src/deb/ephemeral.rs
+++ b/src/deb/ephemeral.rs
@@ -102,6 +102,10 @@ impl EphemeralContextGuard {
         log::debug!("Extracting chroot tarball to {}...", chroot_path.display());
         Self::extract_tarball(&tarball_path, chroot_path)?;
 
+        // Create device nodes in the chroot
+        log::debug!("Creating device nodes in chroot...");
+        Self::create_device_nodes(chroot_path)?;
+
         Ok(())
     }
 
@@ -167,6 +171,57 @@ impl EphemeralContextGuard {
 
         Ok(())
     }
+
+    fn create_device_nodes(chroot_path: &Path) -> Result<(), Box<dyn Error>> {
+        let ctx = context::current();
+        let dev_null_path = chroot_path.join("dev/null");
+        let dev_zero_path = chroot_path.join("dev/zero");
+
+        // Ensure /dev directory exists
+        fs::create_dir_all(chroot_path.join("dev"))?;
+
+        // Remove existing device nodes if they exist
+        let _ = ctx
+            .command("rm")
+            .arg("-f")
+            .arg(dev_null_path.to_string_lossy().to_string())
+            .status();
+
+        let _ = ctx
+            .command("rm")
+            .arg("-f")
+            .arg(dev_zero_path.to_string_lossy().to_string())
+            .status();
+
+        // Create new device nodes using fakeroot and mknod
+        let status_null = ctx
+            .command("sudo")
+            .arg("mknod")
+            .arg("-m")
+            .arg("666")
+            .arg(dev_null_path.to_string_lossy().to_string())
+            .arg("c")
+            .arg("1")
+            .arg("3")
+            .status()?;
+
+        let status_zero = ctx
+            .command("sudo")
+            .arg("mknod")
+            .arg("-m")
+            .arg("666")
+            .arg(dev_zero_path.to_string_lossy().to_string())
+            .arg("c")
+            .arg("1")
+            .arg("5")
+            .status()?;
+
+        if !status_null.success() || !status_zero.success() {
+            return Err("Failed to create device nodes".into());
+        }
+
+        Ok(())
+    }
 }
 
 impl Drop for EphemeralContextGuard {