X-Git-Url: http://sigrok.org/gitweb/?a=blobdiff_plain;ds=sidebyside;f=src%2Fusb.c;h=ec502c97501704f38bed9b2d535374166ff7601e;hb=5c868fef4383e2e8ec4b1d09608c1c0a0f158410;hp=c3279d0ae1ef58640013483f9b6711deca9be15a;hpb=155b680da482cea2381becb73c51cfb838bff31e;p=libsigrok.git

diff --git a/src/usb.c b/src/usb.c
index c3279d0a..ec502c97 100644
--- a/src/usb.c
+++ b/src/usb.c
@@ -20,6 +20,7 @@
  */
 
 #include <stdlib.h>
+#include <memory.h>
 #include <glib.h>
 #include <libusb.h>
 #include "libsigrok.h"
@@ -269,3 +270,19 @@ SR_PRIV int usb_source_remove(struct sr_session *session, struct sr_context *ctx
 
 	return SR_OK;
 }
+
+SR_PRIV int usb_get_port_path(libusb_device *dev, char *path, int path_len)
+{
+	uint8_t port_numbers[8];
+	int i, n, len;
+
+	n = libusb_get_port_numbers(dev, port_numbers, sizeof(port_numbers));
+
+	len = snprintf(path, path_len, "usb/%d-%d",
+	               libusb_get_bus_number(dev), port_numbers[0]);
+
+	for (i = 1; i < n; i++)
+		len += snprintf(path+len, path_len-len, ".%d", port_numbers[i]);
+
+	return SR_OK;
+}