Replace libudev backend with sd_device backend

README.md

@@ -1,6 +1,6 @@
 # Usb.Events
 
-Subscribe to the Inserted and Removed events to be notified when a USB drive is plugged in or unplugged, or when a USB device is connected or disconnected. Usb.Events is a .NET Standard 2.0 library and uses WMI on Windows, libudev on Linux and IOKit on macOS.
+Subscribe to the Inserted and Removed events to be notified when a USB drive is plugged in or unplugged, or when a USB device is connected or disconnected. Usb.Events is a .NET Standard 2.0 library and uses WMI on Windows, libsystemd on Linux and IOKit on macOS.
 
 ## How to use:
 
@@ -84,7 +84,7 @@ sudo apt-get install build-essential
 ```
 32-bit and 64-bit udev with:
 ```
-sudo apt-get install libudev-dev:i386 libudev-dev:amd64
+sudo apt-get install libsystemd0:i386 libsystemd0:amd64
 ```
 support for compiling 32-bit on 64-bit Linux:
 ```
@@ -131,9 +131,15 @@ To build 32-bit and 64-bit ARM versions of `UsbEventWatcher.Linux.so` on Windows
 
 - [ ] Automatically mount USB drive on `UsbDeviceAdded` event in Linux
 - [ ] Automatically mount USB drive on `UsbDeviceAdded` event in macOS
+- [ ] Determine if other operating systems do not display extended info for unplugged devices and update the documentation as necessary
 
 ## Version history:
 
+- 11.2.0.1:
+    - Replaced libudev backend with sd-device backend for Linux clients
+    - Replace custom linux event loop with libsystemd's sd-event loop
+    - Update readme
+    - Explicitly mention that events for unplugged USB devices only return the system name and system path in Linux
 - 11.1.0.1:
     - Added XML documentation
 - 11.1.0.0:

Usb.Events/IUsbEventWatcher.cs

@@ -4,7 +4,7 @@
 namespace Usb.Events
 {
     /// <summary>
-    /// Main Usb.Events interface
+    /// Monitors USB device insertions and removals, and block device mounts and unmounts.
     /// </summary>
     public interface IUsbEventWatcher : IDisposable
     {

Usb.Events/Linux/.vscode/launch.json

@@ -27,18 +27,5 @@
       "MIMode": "gdb",
       "miDebuggerPath": "gdb"
     },
-    {
-      "name": "Debug UsbEventWatcher.Linux.so",
-      "type": "cppdbg",
-      "request": "launch",
-      "program": "${workspaceFolder}/../UsbEventWatcher.Linux.so",
-      "args": [],
-      "stopAtEntry": false,
-      "cwd": "${workspaceFolder}",
-      "environment": [],
-      "externalConsole": false,
-      "MIMode": "gdb",
-      "miDebuggerPath": "gdb"
-    }
   ]
-}
+}

Usb.Events/Linux/Makefile

@@ -1,16 +1,17 @@
-# Compiler options
-CC = gcc
-CFLAGS = -Wall -Wextra -Werror -pedantic -std=c99 -Wno-unused-parameter
-LDFLAGS = -ludev -pthread
-
 # Directories
 SRC_DIR = .
 OBJ_DIR = obj
 BIN_DIR = bin
 
+# Compiler options
+CC = gcc
+CFLAGS = -Wall -Wextra -Werror -pedantic -std=c99 -Wno-unused-parameter
+LDFLAGS = -lsystemd -pthread
+
 # Source files
 SRCS = $(wildcard $(SRC_DIR)/*.c)
 OBJS = $(patsubst $(SRC_DIR)/%.c, $(OBJ_DIR)/%.o, $(SRCS))
+DEPS = UsbEventWatcher.Linux.h
 EXEC = $(BIN_DIR)/UsbEventWatcher
 
 # Targets
@@ -23,6 +24,9 @@ $(EXEC): $(OBJS)
 $(OBJ_DIR)/%.o: $(SRC_DIR)/%.c
 	@mkdir -p $(OBJ_DIR)
 	$(CC) $(CFLAGS) -c $< -o $@
+
+$(OBJ_DIR)/UsbEventWatcher.Linux.o: $(DEPS)
+$(OBJ_DIR)/main.o: $(DEPS)
 
 debug: CFLAGS += -g
 debug: clean all