diff -up libusb-0.1.12/configure.in.openat libusb-0.1.12/configure.in
--- libusb-0.1.12/configure.in.openat	2006-03-04 03:53:04.000000000 +0100
+++ libusb-0.1.12/configure.in	2007-09-04 08:41:04.000000000 +0200
@@ -188,6 +188,7 @@ AC_CHECK_HEADERS(values.h, AC_DEFINE_UNQ
 
 # Check for some functions
 AC_CHECK_FUNCS(memmove)
+AC_CHECK_FUNCS(openat)
 
 if test "$os_support" = "bsd"; then
   AC_MSG_CHECKING(if dev/usb/usb.h uses new naming convention)
diff -up libusb-0.1.12/linux.c.openat libusb-0.1.12/linux.c
--- libusb-0.1.12/linux.c.openat	2006-03-04 03:52:46.000000000 +0100
+++ libusb-0.1.12/linux.c	2007-09-04 08:40:27.000000000 +0200
@@ -341,12 +341,10 @@ int usb_os_find_busses(struct usb_bus **
       continue;
     }
 
-    bus = malloc(sizeof(*bus));
+    bus = calloc(1, sizeof(*bus));
     if (!bus)
       USB_ERROR(-ENOMEM);
 
-    memset((void *)bus, 0, sizeof(*bus));
-
     strncpy(bus->dirname, entry->d_name, sizeof(bus->dirname) - 1);
     bus->dirname[sizeof(bus->dirname) - 1] = 0;
 
@@ -367,6 +365,9 @@ int usb_os_find_devices(struct usb_bus *
 {
   struct usb_device *fdev = NULL;
   DIR *dir;
+#ifdef HAVE_OPENAT
+  int dfd;
+#endif
   struct dirent *entry;
   char dirpath[PATH_MAX + 1];
 
@@ -376,37 +377,54 @@ int usb_os_find_devices(struct usb_bus *
   if (!dir)
     USB_ERROR_STR(-errno, "couldn't opendir(%s): %s", dirpath,
 	strerror(errno));
+#ifdef HAVE_OPENAT
+  dfd = dirfd (dir);
+#endif
 
   while ((entry = readdir(dir)) != NULL) {
     unsigned char device_desc[DEVICE_DESC_LENGTH];
+#ifndef HAVE_OPENAT
     char filename[PATH_MAX + 1];
+#endif
     struct usb_device *dev;
     struct usb_connectinfo connectinfo;
     int i, fd, ret;
 
+#ifdef _DIRENT_HAVE_D_TYPE
+    /* If we know this is a directory don't bother any further.  */
+    if (entry->d_type == DT_DIR)
+      continue;
+#endif
+
     /* Skip anything starting with a . */
     if (entry->d_name[0] == '.')
       continue;
 
-    dev = malloc(sizeof(*dev));
+    dev = calloc(1, sizeof(*dev));
     if (!dev)
       USB_ERROR(-ENOMEM);
 
-    memset((void *)dev, 0, sizeof(*dev));
-
     dev->bus = bus;
 
     strncpy(dev->filename, entry->d_name, sizeof(dev->filename) - 1);
     dev->filename[sizeof(dev->filename) - 1] = 0;
 
+#ifdef HAVE_OPENAT
+    fd = openat(dfd, entry->d_name, O_RDWR);
+#else
     snprintf(filename, sizeof(filename) - 1, "%s/%s", dirpath, entry->d_name);
     fd = open(filename, O_RDWR);
+#endif
     if (fd < 0) {
+#ifdef HAVE_OPENAT
+      fd = openat(dfd, entry->d_name, O_RDONLY);
+#else
       fd = open(filename, O_RDONLY);
+#endif
       if (fd < 0) {
         if (usb_debug >= 2)
-          fprintf(stderr, "usb_os_find_devices: Couldn't open %s\n",
-                  filename);
+          fprintf(stderr, "usb_os_find_devices: Couldn't open %s/%s\n",
+                  dirpath, entry->d_name);
 
         free(dev);
         continue;
@@ -453,14 +471,11 @@ int usb_os_find_devices(struct usb_bus *
       /* Silent since we'll try again later */
       goto err;
 
-    dev->config = (struct usb_config_descriptor *)malloc(dev->descriptor.bNumConfigurations * sizeof(struct usb_config_descriptor));
+    dev->config = (struct usb_config_descriptor *)calloc(dev->descriptor.bNumConfigurations, sizeof(struct usb_config_descriptor));
     if (!dev->config)
       /* Silent since we'll try again later */
       goto err;
 
-    memset(dev->config, 0, dev->descriptor.bNumConfigurations *
-          sizeof(struct usb_config_descriptor));
-
     for (i = 0; i < dev->descriptor.bNumConfigurations; i++) {
       unsigned char buffer[8], *bigbuffer;
       struct usb_config_descriptor config;