add auto refresh when usb device plug/unplug

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "stm32-for-vscode.openOCDPath": false
+}

Makefile.am

@@ -3,8 +3,8 @@
 #
 ## Process this file with automake to produce Makefile.in
 
-AM_CPPFLAGS = $(GTK_CFLAGS)
-usbview_LDADD = $(GTK_LIBS)
+AM_CPPFLAGS = $(GTK_CFLAGS) $(LIBUDEV_CFLAGS)
+usbview_LDADD = $(GTK_LIBS) $(LIBUDEV_LIBS)
 
 bin_PROGRAMS = usbview
 

configure.ac

@@ -48,6 +48,7 @@ AM_CONDITIONAL(ICONS,[test x${icons} = xyes])
 
 AC_SEARCH_LIBS([strerror],[cposix])
 PKG_CHECK_MODULES([GTK], [gtk+-3.0 >= 3.0])
+PKG_CHECK_MODULES([LIBUDEV], [libudev])
 AC_SUBST([GTK_FLAGS])
 AC_SUBST([GTK_LIBS])
 

main.c

@@ -4,7 +4,7 @@
  * Copyright (c) 1999, 2000 by Greg Kroah-Hartman, <[email protected]>
  */
 #ifdef HAVE_CONFIG_H
-	#include <config.h>
+#include <config.h>
 #endif
 
 #include <stdlib.h>
@@ -13,24 +13,108 @@
 
 #include "usbtree.h"
 
-int main (int argc, char *argv[])
+#include <libudev.h>
+#include <glib-unix.h>
+
+static struct udev *udev = NULL;
+static struct udev_monitor *mon = NULL;
+static guint udev_source_id = 0;
+
+static gboolean udev_mon_cb(gint fd, GIOCondition condition, gpointer user_data)
 {
-	GtkWidget *window1;
+    struct udev_device *dev;
+    struct udev_device *parent_dev;
+    const char *action;
+    const char *dev_id_str;
+
+    dev = udev_monitor_receive_device(mon);
+    if (!dev)
+    {
+        g_warning("failed to receive device from udev monitor");
+        return TRUE;
+    }
+
+    action = udev_device_get_action(dev);
+    if (action)
+    {
+        parent_dev = udev_device_get_parent(dev);
+        dev_id_str = udev_device_get_property_value(dev, "ID_MODEL");
+
+        const char *devtype = udev_device_get_devtype(dev);
+        if (devtype && strcmp(devtype, "usb_device") != 0)
+        {
+            udev_device_unref(dev);
+            return TRUE;
+        }
+
+        if (strncmp(action, "remove", 7) == 0)
+        {
+            g_message("a device was removed (from %s)", udev_device_get_property_value(parent_dev, "ID_MODEL"));
+        }
+        else if (strncmp(action, "add", 3) == 0)
+        {
+            g_message("add a device: > %s < (from %s)",
+                      dev_id_str ? dev_id_str : "unknown",
+                      udev_device_get_property_value(parent_dev, "ID_MODEL"));
+        }
+        else
+        {
+            g_debug("udev action: %s for device: %s (%s)",
+                      action,
+                      udev_device_get_property_value(dev, "ID_MODEL"),
+                      parent_dev ? udev_device_get_property_value(parent_dev, "ID_MODEL") : "");
+        }
+
+        LoadUSBTree(666);
+    }
+
+    udev_device_unref(dev);
+    return TRUE;
+}
 
-	gtk_init (&argc, &argv);
+static void init_udev_mon(void)
+{
+    udev = udev_new();
+    if (!udev)
+    {
+        g_warning("failed to create udev context");
+        return;
+    }
 
-	initialize_stuff();
+    mon = udev_monitor_new_from_netlink(udev, "udev");
+    if (!mon)
+    {
+        g_warning("failed to create udev monitor");
+        udev_unref(udev);
+        return;
+    }
 
-	/*
-	 * The following code was added by Glade to create one of each component
-	 * (except popup menus), just so that you see something after building
-	 * the project. Delete any components that you don't want shown initially.
-	 */
-	window1 = create_windowMain ();
-	gtk_widget_show (window1);
+    udev_monitor_filter_add_match_subsystem_devtype(mon, "usb", NULL);
+    udev_monitor_enable_receiving(mon);
 
-	LoadUSBTree(0);
-	gtk_main ();
-	return 0;
+    udev_source_id = g_unix_fd_add(udev_monitor_get_fd(mon), G_IO_IN | G_IO_ERR | G_IO_HUP,
+                                   udev_mon_cb, NULL);
 }
 
+int main(int argc, char *argv[])
+{
+    GtkWidget *window1;
+
+    gtk_init(&argc, &argv);
+    // Initialize udev monitor
+    init_udev_mon();
+
+    initialize_stuff();
+
+    /*
+     * The following code was added by Glade to create one of each component
+     * (except popup menus), just so that you see something after building
+     * the project. Delete any components that you don't want shown initially.
+     */
+    window1 = create_windowMain();
+    gtk_widget_show(window1);
+
+    LoadUSBTree(0);
+    gtk_main();
+    return 0;
+}