Expand hwutils, udev-shim, and redbear-sessiond system recipes

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

local/recipes/system/redbear-hwutils/source/src/lib.rs

@@ -1,4 +1,17 @@
+use std::collections::HashMap;
 use std::fmt;
+use std::fs;
+use std::sync::OnceLock;
+
+const PCI_IDS_PATH: &str = "/usr/share/misc/pci.ids";
+
+#[derive(Default)]
+struct PciIdDatabase {
+    vendor_names: HashMap<u16, String>,
+    device_names: HashMap<(u16, u16), String>,
+}
+
+static PCI_ID_DATABASE: OnceLock<Option<PciIdDatabase>> = OnceLock::new();
 
 #[derive(Clone, Copy, Debug, Eq, Ord, PartialEq, PartialOrd)]
 pub struct PciLocation {
@@ -78,3 +91,110 @@ pub fn describe_usb_device(manufacturer: Option<&str>, product: Option<&str>) ->
         parts.join(" ")
     }
 }
+
+fn load_pci_id_database() -> Option<PciIdDatabase> {
+    let text = fs::read_to_string(PCI_IDS_PATH).ok()?;
+    Some(parse_pci_id_database(&text))
+}
+
+fn parse_pci_id_database(text: &str) -> PciIdDatabase {
+    let mut database = PciIdDatabase::default();
+    let mut current_vendor = None;
+
+    for line in text.lines() {
+        if line.is_empty() || line.starts_with('#') {
+            continue;
+        }
+
+        if let Some(rest) = line.strip_prefix("\t\t") {
+            let _ = rest;
+            continue;
+        }
+
+        if let Some(rest) = line.strip_prefix('\t') {
+            let Some(vendor_id) = current_vendor else {
+                continue;
+            };
+            let mut parts = rest.splitn(2, char::is_whitespace).filter(|part| !part.is_empty());
+            let Some(device_hex) = parts.next() else {
+                continue;
+            };
+            let Some(name) = parts.next() else {
+                continue;
+            };
+            let Ok(device_id) = u16::from_str_radix(device_hex, 16) else {
+                continue;
+            };
+            database
+                .device_names
+                .insert((vendor_id, device_id), name.trim().to_string());
+            continue;
+        }
+
+        let mut parts = line.splitn(2, char::is_whitespace).filter(|part| !part.is_empty());
+        let Some(vendor_hex) = parts.next() else {
+            continue;
+        };
+        let Some(name) = parts.next() else {
+            continue;
+        };
+        let Ok(vendor_id) = u16::from_str_radix(vendor_hex, 16) else {
+            continue;
+        };
+        current_vendor = Some(vendor_id);
+        database.vendor_names.insert(vendor_id, name.trim().to_string());
+    }
+
+    database
+}
+
+fn pci_id_database() -> Option<&'static PciIdDatabase> {
+    PCI_ID_DATABASE.get_or_init(load_pci_id_database).as_ref()
+}
+
+pub fn lookup_pci_vendor_name(vendor_id: u16) -> Option<String> {
+    pci_id_database()?.vendor_names.get(&vendor_id).cloned()
+}
+
+pub fn lookup_pci_device_name(vendor_id: u16, device_id: u16) -> Option<String> {
+    pci_id_database()?
+        .device_names
+        .get(&(vendor_id, device_id))
+        .cloned()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::parse_pci_id_database;
+
+    #[test]
+    fn parses_vendor_and_device_entries_from_pci_ids() {
+        let db = parse_pci_id_database(
+            "8086  Intel Corporation\n\t46A6  Alder Lake-P Integrated Graphics Controller\n1002  Advanced Micro Devices, Inc. [AMD/ATI]\n\t7480  Navi 32 [Radeon RX 7800 XT / 7700 XT]\n",
+        );
+
+        assert_eq!(
+            db.vendor_names.get(&0x8086).map(String::as_str),
+            Some("Intel Corporation")
+        );
+        assert_eq!(
+            db.device_names.get(&(0x8086, 0x46A6)).map(String::as_str),
+            Some("Alder Lake-P Integrated Graphics Controller")
+        );
+        assert_eq!(
+            db.device_names.get(&(0x1002, 0x7480)).map(String::as_str),
+            Some("Navi 32 [Radeon RX 7800 XT / 7700 XT]")
+        );
+    }
+
+    #[test]
+    fn ignores_subsystem_lines_and_comments() {
+        let db = parse_pci_id_database(
+            "# comment\n8086  Intel Corporation\n\t46A6  Alder Lake-P Integrated Graphics Controller\n\t\t17AA  3C6A  Lenovo variant\n",
+        );
+
+        assert_eq!(db.vendor_names.len(), 1);
+        assert_eq!(db.device_names.len(), 1);
+        assert!(db.device_names.get(&(0x17AA, 0x3C6A)).is_none());
+    }
+}