Relocate usb_detach to utils (#5121)

[qmk_firmware.git] / util / usb_detach / usb_detach.c

diff --git a/util/usb_detach/usb_detach.c b/util/usb_detach/usb_detach.c
new file mode 100644 (file)
index 0000000..786ab5e
--- /dev/null
+++ b/util/usb_detach/usb_detach.c
@@ -0,0 +1,34 @@
+/* Found at https://www.linuxquestions.org/questions/linux-hardware-18/how-to-unclaim-usb-device-558138/#post3406986 */
+#include <stdio.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <linux/ioctl.h>
+#include <linux/usbdevice_fs.h>
+
+int main(int argc, char**argv)
+{
+        struct usbdevfs_ioctl command;
+        int ret;
+        int fd;
+        int i;
+        if (argc>1) {
+                fd = open(argv[1],O_RDWR);
+                if (fd<1){
+                        perror("unable to open file");
+                        return 1;
+                }
+                for (i=0;i<255;i++){ // hack: should fetch how many interface there is.
+                        command.ifno = i;
+                        command.ioctl_code = USBDEVFS_DISCONNECT;
+                        command.data = NULL;
+                        ret = ioctl(fd, USBDEVFS_IOCTL, &command);
+                        if(ret!=-1)
+                                printf("un claimed interface %d %d\n",i,ret);
+                }
+        } else {
+                printf ("usage: %s /dev/bus/usb/BUS/DEVICE\n",argv[0]);
+                printf("Release all interfaces of this usb device for usage in virtualisation\n");
+        }
+}
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