examples/testlibusb: Add support for testing libusb_wrap_sys_device()
Sometimes it is useful to be able to test libusb_wrap_sys_device(),
add support for this to the testlibusb example
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
diff --git a/examples/testlibusb.c b/examples/testlibusb.c
index 8031e75..f9e095a 100755
--- a/examples/testlibusb.c
+++ b/examples/testlibusb.c
@@ -160,10 +160,9 @@
print_interface(&config->interface[i]);
}
-static void print_device(libusb_device *dev)
+static void print_device(libusb_device *dev, libusb_device_handle *handle)
{
struct libusb_device_descriptor desc;
- libusb_device_handle *handle = NULL;
unsigned char string[256];
int ret;
uint8_t i;
@@ -178,8 +177,10 @@
libusb_get_bus_number(dev), libusb_get_device_address(dev),
desc.idVendor, desc.idProduct);
- ret = libusb_open(dev, &handle);
- if (LIBUSB_SUCCESS == ret) {
+ if (!handle)
+ libusb_open(dev, &handle);
+
+ if (handle) {
if (desc.iManufacturer) {
ret = libusb_get_string_descriptor_ascii(handle, desc.iManufacturer, string, sizeof(string));
if (ret > 0)
@@ -222,28 +223,78 @@
libusb_close(handle);
}
+#ifdef __linux__
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+static int test_wrapped_device(const char *device_name)
+{
+ libusb_device_handle *handle;
+ int r, fd;
+
+ fd = open(device_name, O_RDWR);
+ if (fd < 0) {
+ printf("Error could not open %s: %s\n", device_name, strerror(errno));
+ return 1;
+ }
+ r = libusb_wrap_sys_device(NULL, fd, &handle);
+ if (r) {
+ printf("Error wrapping device: %s: %s\n", device_name, libusb_strerror(r));
+ close(fd);
+ return 1;
+ }
+ print_device(libusb_get_device(handle), handle);
+ close(fd);
+ return 0;
+}
+#else
+static int test_wrapped_device(const char *device_name)
+{
+ printf("Testing wrapped devices is not supported on your platform\n");
+ return 1;
+}
+#endif
+
int main(int argc, char *argv[])
{
+ const char *device_name = NULL;
libusb_device **devs;
ssize_t cnt;
int r, i;
- if (argc > 1 && !strcmp(argv[1], "-v"))
- verbose = 1;
+ for (i = 1; i < argc; i++) {
+ if (!strcmp(argv[i], "-v")) {
+ verbose = 1;
+ } else if (!strcmp(argv[i], "-d") && (i + 1) < argc) {
+ i++;
+ device_name = argv[i];
+ } else {
+ printf("Usage %s [-v] [-d </dev/bus/usb/...>]\n", argv[0]);
+ printf("Note use -d to test libusb_wrap_sys_device()\n");
+ return 1;
+ }
+ }
r = libusb_init(NULL);
if (r < 0)
return r;
- cnt = libusb_get_device_list(NULL, &devs);
- if (cnt < 0)
- return (int)cnt;
+ if (device_name) {
+ r = test_wrapped_device(device_name);
+ } else {
+ cnt = libusb_get_device_list(NULL, &devs);
+ if (cnt < 0) {
+ libusb_exit(NULL);
+ return 1;
+ }
- for (i = 0; devs[i]; i++)
- print_device(devs[i]);
+ for (i = 0; devs[i]; i++)
+ print_device(devs[i], NULL);
- libusb_free_device_list(devs, 1);
+ libusb_free_device_list(devs, 1);
+ }
libusb_exit(NULL);
- return 0;
+ return r;
}
