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lsusb.c provided from libusb-1.0 source

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0 parents commit ec693d0d6b20f26fa5702ee7ae60900926abf0f1 @erjiang committed Nov 27, 2010
Showing with 70 additions and 0 deletions.
  1. +6 −0 Makefile
  2. +64 −0 lsusb.c
@@ -0,0 +1,6 @@
+LD=-lusb-1.0
+CC=gcc
+CFLAGS=-Os
+
+lsusb: lsusb.c
+ $(CC) lsusb.c -o lsusb $(CFLAGS) $(LD)
64 lsusb.c
@@ -0,0 +1,64 @@
+/*
+ * libusb example program to list devices on the bus
+ * Copyright (C) 2007 Daniel Drake <dsd@gentoo.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdio.h>
+#include <sys/types.h>
+
+#include <libusb-1.0/libusb.h>
+
+static void print_devs(libusb_device **devs)
+{
+ libusb_device *dev;
+ int i = 0;
+
+ while ((dev = devs[i++]) != NULL) {
+ struct libusb_device_descriptor desc;
+ int r = libusb_get_device_descriptor(dev, &desc);
+ if (r < 0) {
+ fprintf(stderr, "failed to get device descriptor");
+ return;
+ }
+
+ printf("%04x:%04x (bus %d, device %d)\n",
+ desc.idVendor, desc.idProduct,
+ libusb_get_bus_number(dev), libusb_get_device_address(dev));
+ }
+}
+
+int main(void)
+{
+ libusb_device **devs;
+ int r;
+ ssize_t cnt;
+
+ r = libusb_init(NULL);
+ if (r < 0)
+ return r;
+
+ cnt = libusb_get_device_list(NULL, &devs);
+ if (cnt < 0)
+ return (int) cnt;
+
+ print_devs(devs);
+ libusb_free_device_list(devs, 1);
+
+ libusb_exit(NULL);
+ return 0;
+}
+

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