From 0ee55c3362abf1f7bf8dc4e5de161f1ba8c97ec1 Mon Sep 17 00:00:00 2001
From: unitexe <unitexe70@gmail.com>
Date: Sat, 7 Jun 2025 20:50:57 -0500
Subject: Query connected USB devices via gRPC server

---
 .gitignore        |    5 +
 Cargo.lock        | 1041 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml        |   13 +
 build.rs          |    9 +
 proto/ormos.proto |   19 +
 src/main.rs       |  134 +++++++
 6 files changed, 1221 insertions(+)
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 build.rs
 create mode 100644 proto/ormos.proto
 create mode 100644 src/main.rs

diff --git a/.gitignore b/.gitignore
index cfbeb4f..ef830bb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,3 +19,8 @@ target/
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 #.idea/
+
+
+# Added by cargo
+
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..49138e8
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,1041 @@
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..c309728
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,13 @@
+[package]
+name = "skopos"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+prost = "0.13.5"
+tokio = { version = "1.45.1", features = ["macros", "rt-multi-thread"] }
+tonic = "0.13.1"
+tonic-reflection = "0.13.1"
+
+[build-dependencies]
+tonic-build = "0.13.1"
diff --git a/build.rs b/build.rs
new file mode 100644
index 0000000..2c2bae8
--- /dev/null
+++ b/build.rs
@@ -0,0 +1,9 @@
+use std::{env, path::PathBuf};
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let descriptor_path = PathBuf::from(env::var("OUT_DIR").unwrap()).join("skopos_descriptor.bin");
+    tonic_build::configure()
+        .file_descriptor_set_path(&descriptor_path)
+        .compile_protos(&["proto/ormos.proto"], &["/proto/"])?;
+    Ok(())
+}
diff --git a/proto/ormos.proto b/proto/ormos.proto
new file mode 100644
index 0000000..5d20c4d
--- /dev/null
+++ b/proto/ormos.proto
@@ -0,0 +1,19 @@
+syntax = "proto3";
+
+package unit.containers.v0;
+
+service Ormos {
+  rpc ListUsbDevices (ListUsbDevicesRequest) returns (ListUsbDevicesResponse) {}
+}
+
+message ListUsbDevicesRequest {}
+
+message ListUsbDevicesResponse {
+  repeated UsbDevice devices = 1;
+}
+
+message UsbDevice {
+  string device_path = 1;
+  bool is_mounted = 2;
+  string mount_point = 3;
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..787e798
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,134 @@
+use tonic::{transport::Server, Request, Response, Status};
+use skopos::ormos_server::{Ormos, OrmosServer};
+use skopos::{ListUsbDevicesRequest, ListUsbDevicesResponse, UsbDevice};
+use std::io;
+use std::fs;
+
+pub mod skopos {
+    tonic::include_proto!("unit.containers.v0");
+
+    pub(crate) const FILE_DESCRIPTOR_SET: &[u8] =
+        tonic::include_file_descriptor_set!("skopos_descriptor");
+}
+
+#[derive(Default)]
+pub struct MyOrmos {}
+
+fn list_usb_block_devices() -> io::Result<Vec<String>> {
+    let mut usb_devices = Vec::new();
+    let dev_path = "/dev";
+    let entries = fs::read_dir(dev_path)?;
+    
+    for entry in entries {
+        let entry = entry?;
+        let device_name = entry.file_name();
+        let device_str = device_name.to_string_lossy();
+        
+        if device_str.starts_with("sd") && device_str.len() == 3 {
+            if is_usb_storage_device(&device_str) {
+                let device_path = format!("/dev/{}", device_str);
+                usb_devices.push(device_path);
+                
+                let partitions = get_partitions(&device_str)?;
+                usb_devices.extend(partitions);
+            }
+        }
+    }
+    
+    Ok(usb_devices)
+}
+
+fn is_usb_storage_device(device_name: &str) -> bool {
+    let sys_path = format!("/sys/block/{}/removable", device_name);
+    
+    if let Ok(content) = fs::read_to_string(&sys_path) {
+        return content.trim() == "1";
+    }
+    
+    false
+}
+
+fn get_partitions(device_name: &str) -> io::Result<Vec<String>> {
+    let mut partitions = Vec::new();
+    let dev_path = "/dev";
+    let entries = fs::read_dir(dev_path)?;
+    
+    for entry in entries {
+        let entry = entry?;
+        let partition_name = entry.file_name();
+        let partition_str = partition_name.to_string_lossy();
+        
+        if partition_str.starts_with(device_name) && partition_str.len() > device_name.len() {
+            let partition_path = format!("/dev/{}", partition_str);
+            partitions.push(partition_path);
+        }
+    }
+    
+    Ok(partitions)
+}
+
+fn get_mount_info(device_path: &str) -> (bool, String) {
+    if let Ok(mounts) = fs::read_to_string("/proc/mounts") {
+        for line in mounts.lines() {
+            let parts: Vec<&str> = line.split_whitespace().collect();
+            if parts.len() >= 2 && parts[0] == device_path {
+                return (true, parts[1].to_string());
+            }
+        }
+    }
+    (false, String::new())
+}
+
+fn create_usb_devices(device_paths: Vec<String>) -> Vec<UsbDevice> {
+    device_paths
+        .into_iter()
+        .map(|device_path| {
+            let (is_mounted, mount_point) = get_mount_info(&device_path);
+            
+            UsbDevice {
+                device_path,
+                is_mounted,
+                mount_point,
+            }
+        })
+        .collect()
+}
+
+#[tonic::async_trait]
+impl Ormos for MyOrmos {
+    async fn list_usb_devices(
+        &self,
+        _request: Request<ListUsbDevicesRequest>,
+    ) -> Result<Response<ListUsbDevicesResponse>, Status> {
+        let usb_device_paths = list_usb_block_devices()
+            .map_err(|e| Status::internal(format!("Failed to list USB devices: {}", e)))?;
+        
+        let devices = create_usb_devices(usb_device_paths);
+        
+        let response = ListUsbDevicesResponse {
+            devices,
+        };
+        
+        Ok(Response::new(response))
+    }
+}
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let addr = "0.0.0.0:50052".parse().unwrap();
+    let ormos = MyOrmos::default();
+    
+    let reflection = tonic_reflection::server::Builder::configure()
+        .register_encoded_file_descriptor_set(skopos::FILE_DESCRIPTOR_SET)
+        .build_v1()?;
+
+    println!("Listening on {}", addr);
+
+    Server::builder()
+        .add_service(reflection)
+        .add_service(OrmosServer::new(ormos))
+        .serve(addr)
+        .await?;
+
+    Ok(())
+}
-- 
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