From fc0fc7fff5b10423e19c2101ce4e28ff293f11bd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Vuchener?= <clement.vuchener@gmail.com>
Date: Fri, 11 Dec 2015 15:05:25 +0100
Subject: [PATCH] Device list tool

---
 CMakeLists.txt                   |   1 +
 src/tools/CMakeLists.txt         |   6 ++
 src/tools/hidpp-list-devices.cpp | 124 +++++++++++++++++++++++++++++++
 3 files changed, 131 insertions(+)
 create mode 100644 src/tools/hidpp-list-devices.cpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 07eceee..fac041f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -18,6 +18,7 @@ endif()
 
 find_package(PkgConfig REQUIRED)
 pkg_check_modules(TINYXML2 tinyxml2)
+pkg_check_modules(LIBUDEV libudev)
 
 add_subdirectory(src/libhidpp)
 add_subdirectory(src/tools)
diff --git a/src/tools/CMakeLists.txt b/src/tools/CMakeLists.txt
index 565e0ac..bb9d0a4 100644
--- a/src/tools/CMakeLists.txt
+++ b/src/tools/CMakeLists.txt
@@ -14,6 +14,12 @@ add_library(common OBJECT ${COMMON_SOURCES})
 add_executable(hidpp-test hidpp-test.cpp $<TARGET_OBJECTS:common>)
 target_link_libraries(hidpp-test hidpp)
 
+if(LIBUDEV_FOUND)
+	add_executable(hidpp-list-devices hidpp-list-devices.cpp $<TARGET_OBJECTS:common>)
+	target_include_directories(hidpp-list-devices PUBLIC ${LIBUDEV_INCLUDE_DIRECTORIES})
+	target_link_libraries(hidpp-list-devices hidpp ${LIBUDEV_LIBRARIES})
+endif()
+
 add_executable(hidpp-list-features hidpp-list-features.cpp $<TARGET_OBJECTS:common>)
 target_link_libraries(hidpp-list-features hidpp)
 
diff --git a/src/tools/hidpp-list-devices.cpp b/src/tools/hidpp-list-devices.cpp
new file mode 100644
index 0000000..05a76b2
--- /dev/null
+++ b/src/tools/hidpp-list-devices.cpp
@@ -0,0 +1,124 @@
+/*
+ * Copyright 2015 Clément Vuchener
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <cstdio>
+#include <cstring>
+
+extern "C" {
+#include <libudev.h>
+}
+
+#include <misc/SysCallError.h>
+#include <misc/Log.h>
+#include <hidpp/Device.h>
+#include <hidpp10/Error.h>
+
+#include "common/common.h"
+#include "common/Option.h"
+#include "common/CommonOptions.h"
+
+int main (int argc, char *argv[])
+{
+	std::vector<Option> options = {
+		VerboseOption (),
+	};
+	Option help = HelpOption (argv[0], "", &options);
+	options.push_back (help);
+
+	int first_arg;
+	if (!Option::processOptions (argc, argv, options, first_arg))
+		return EXIT_FAILURE;
+
+	if (argc-first_arg != 0) {
+		fprintf (stderr, "%s", getUsage (argv[0], "", &options).c_str ());
+		return EXIT_FAILURE;
+	}
+
+	int ret;
+
+	struct udev *ctx = udev_new ();
+	if (!ctx) {
+		fprintf (stderr, "Failed to create udev context\n");
+		return EXIT_FAILURE;
+	}
+
+	struct udev_enumerate *enumerator = udev_enumerate_new (ctx);
+	if (!enumerator) {
+		fprintf (stderr, "Failed to create udev enumerator\n");
+		return EXIT_FAILURE;
+	}
+	if (0 != (ret = udev_enumerate_add_match_subsystem (enumerator, "hidraw"))) {
+		fprintf (stderr, "Failed to add match: %s\n", strerror (ret));
+		return EXIT_FAILURE;
+	}
+	if (0 != (ret = udev_enumerate_scan_devices (enumerator))) {
+		fprintf (stderr, "Failed to scan devices: %s\n", strerror (ret));
+		return EXIT_FAILURE;
+	}
+
+	struct udev_list_entry *current;
+	udev_list_entry_foreach (current, udev_enumerate_get_list_entry (enumerator)) {
+		struct udev_device *device = udev_device_new_from_syspath (ctx, udev_list_entry_get_name (current));
+		const char *hidraw_node = udev_device_get_devnode (device);
+		try {
+			HIDPP::Device dev (hidraw_node);
+			unsigned int major, minor;
+			dev.getProtocolVersion (major, minor);
+			printf ("%s: %s (%04hx:%04hx) HID++ %d.%d\n",
+				hidraw_node, dev.name ().c_str (),
+				dev.vendorID (), dev.productID (),
+				major, minor);
+			for (HIDPP::DeviceIndex index: {
+					HIDPP::WirelessDevice1,
+					HIDPP::WirelessDevice2,
+					HIDPP::WirelessDevice3,
+					HIDPP::WirelessDevice4,
+					HIDPP::WirelessDevice5,
+					HIDPP::WirelessDevice6 }) {
+				try {
+					HIDPP::Device wldev (hidraw_node, index);
+					wldev.getProtocolVersion (major, minor);
+					printf ("%s (wireless device %d): %s (%04hx) HID++ %d.%d\n",
+						hidraw_node, index, wldev.name ().c_str (),
+						wldev.productID (),
+						major, minor);
+				}
+				catch (HIDPP10::Error e) {
+					if (e.errorCode () != HIDPP10::Error::UnknownDevice) {
+						Log::printf (Log::Error,
+							     "Error while querying %s wireless device %d: %s\n",
+							     hidraw_node, index, e.what ());
+					}
+				}
+			}
+
+		}
+		catch (HIDPP::Device::NoHIDPPReportException e) {
+		}
+		catch (SysCallError e) {
+			Log::printf (Log::Warning, "Failed to open %s: %s\n", hidraw_node, e.what ());
+		}
+		udev_device_unref (device);
+	}
+
+	udev_enumerate_unref (enumerator);
+	udev_unref (ctx);
+
+	return 0;
+}
+