usb host id

Hi guys, i have arduino yun.
I connected a USB key on Arduino (in USB host)
I want to run arduino only if the usb stick has the id eg 0123, (using lsusb?) can you help me please?
Thank you

lsusb

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 058f:6254 Alcor Micro Corp. USB Hub
Bus 001 Device 003: ID 058f:6366 Alcor Micro Corp. Multi Flash Reader
Bus 001 Device 004: ID 18a5:0302 Verbatim, Ltd Flash Drive

i want parse this id:

Bus 001 Device 004: ID 18a5:0302 Verbatim, Ltd Flash Drive
nano test.sh
#!/bin/sh
if (lsusb |grep -q "18a5:0302")
then
    # code if found
    echo "Found"
else
    # code if not found
    echo "N/A"
fi
grep --help
...
-q      Quiet. Return 0 if PATTERN is found, 1 otherwisels
...

Hi , thank you but i want include this code in my sketch arduino... is possible?

Process

Thank you… i have tried this sketch…

#include <Process.h>

void setup() {
  
  Bridge.begin();
  Serial.begin(9600);
  
  while (!Serial);

  USBKey();
}

void loop() {
}

void USBKey() {

  Process p;        
  p.begin("lsusb");
  p.addParameter("|grep -q \"18a5:0302\"");
  p.run();
  
  while (p.available()>0) {
    char c = p.read();
    Serial.print(c);
  }
  Serial.flush();
}

but console il empty…how to solve?

nano /mnt/sda1/test.sh

or if you have no MicroSD

nano /root/test.sh
chmod 755  /mnt/sda1/test.sh
Process p;        
  p.begin("/mnt/sda1/test.sh");
  p.run();
  
  while (p.available()>0) {
    char c = p.read();
    Serial.print(c);
  }

always test function of it first at console

/mnt/sda1/test.sh