ubuntu下不用拔盘就可以重新识别usb设备

#!/bin/sh
# Usage: ./resetusb ARGUMENT(The keyword for your usb device)
var1=$
keyword=${var1:=Storage}debug=$(lsusb)
bus=$(lsusb|grep $keyword|perl -nE "/\D+(\d+)\D+(\d+).+/; print qq(\$1)")
device=$(lsusb|grep $keyword|perl -nE "/\D+(\d+)\D+(\d+).+/; print qq(\$2)")echo "/* usbreset -- send a USB port reset to a USB device */#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/ioctl.h>#include <linux/usbdevice_fs.h>int main(int argc, char **argv)
{
const char *filename;
int fd;
int rc; if (argc != ) {
return ;
}
filename = argv[]; fd = open(filename, O_WRONLY);
if (fd < ) {
return ;
} rc = ioctl(fd, USBDEVFS_RESET, );
if (rc < ) {
return ;
} close(fd);
return ;
}" > /tmp/usbreset.c$(cc /tmp/usbreset.c -o /tmp/usbreset)
$(chmod +x /tmp/usbreset)
$(cd /tmp/;./usbreset /dev/bus/usb/$bus/$device)
result=$?
if [ $result != ];then
echo "Reset Usb Failed!"
echo "Please make sure you have inputted right device keyword: $keyword"
echo "You have chose bus:${bus:=Not Found},device:${device:=Not Found}"
echo "More info:\n$debug"
else
echo "Reset Usb $keyword Successfully!"
fi