[udev] Add small utility to check for udev paths

Add small utility to check for udev paths that can be used
for usb cable insertion/type detection in case usb-moded cannot figure
it out.

Signed-off-by: Philippe De Swert <philippe.deswert@jollamobile.com>

utils/udev-search.c

@@ -0,0 +1,65 @@
+/**
+  @file udev-search.c
+
+  This is a basic utility to check for potential
+  viable paths to use for usb_moded.
+
+  This is in case usb_moded can not figure it out for itself.
+
+  compile with gcc -o udev-search udev-search.c -ludev
+
+  Copyright (C) 2014 Jolla. All rights reserved.
+
+  @author: Philippe De Swert <philippe.deswert@jollamobile.com>
+
+  This program is free software; you can redistribute it and/or
+  modify it under the terms of the Lesser GNU General Public License
+  version 2 as published by the Free Software Foundation.
+
+  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 Lesser GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+  02110-1301 USA
+*/
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <locale.h>
+#include <unistd.h>
+
+#include <poll.h>
+
+#include <libudev.h>
+
+
+void main (void)
+{
+  struct udev *udev;
+  struct udev_enumerate *list;
+  struct udev_list_entry *list_entry, *first_entry;
+  const char *udev_name;
+  int ret = 0;
+
+  udev = udev_new();
+  list = udev_enumerate_new(udev);
+  ret  = udev_enumerate_add_match_subsystem(list, "power_supply");
+  ret = udev_enumerate_scan_devices(list);
+  if(ret < 0)
+  {
+	printf("List empty\n");
+	exit(1);
+  }
+  first_entry = udev_enumerate_get_list_entry(list);
+  udev_list_entry_foreach(list_entry, first_entry)
+  {
+    udev_name =  udev_list_entry_get_name(list_entry);
+    printf("power_supply device name = %s\n", udev_name);
+  }
+  exit(0);
+}