Adding a note in the README that lets people know not to use this in …

README.md

@@ -2,6 +2,8 @@
 
 a usb-based dead man's switch for your computer.
 
+****DO NOT USE THIS IN IT'S CURRENT STATE AS AN ANTI-FORENSICS/COMPULSION TOOL THERE ARE CRITICAL EDGE CASES THAT COULD COMPROMISE YOUR FREEDOM OR MORE...**
+
 ## Usage
 ```
 sudo ./deadman

filecheck.go

@@ -1,11 +1,57 @@
 package main
 
 import (
+	"bytes"
+	"log"
+	"os"
 	"os/exec"
 )
 
 func checkExe(path string) error {
 	_, err := exec.LookPath(path)
-	return err
-	//TODO: check for executability
+	if err != nil {
+		return err
+	}
+
+	cmd := "which"	
+	args := []string{path}
+	execCmd := exec.Command(cmd, args...)
+
+	var out bytes.Buffer
+	var stderr bytes.Buffer
+
+	execCmd.Stdout = &out
+	execCmd.Stderr = &stderr
+
+	err = execCmd.Run()
+	if err != nil {
+		log.Println("out: " + out.String())
+		log.Println("stderr: " + stderr.String())
+		log.Println(err)
+	}
+
+	info, err := os.Stat("/usr/bin/lsusb")
+	if err != nil {
+		return err
+	}
+
+	m := info.Mode()
+
+	/*
+		// Bitshift to check if any user can execute given binary
+		log.Println(m&(2>>1))
+
+		// Bitshift to check if group can execute given binary
+		log.Println(m&(1<<3))
+
+		// Bitshift to check if owner can execute given binary
+		log.Println(m&(1<<6))
+	*/
+
+	// Bitshift to check if any user can execute given binary
+	if m&(2>>1) != 0 {
+		return nil
+	} else {
+		return nil
+	}
 }

main.go

@@ -59,12 +59,13 @@ func main() {
 			if err != nil {
 				log.Fatal(err)
 			}
-			// Look to see if there are any new devicies
+			// Look to see if there are any new devices
 			for _, d := range devices {
 				if _, ok := deviceMap[d]; !ok {
 					log.Printf("New device: %s [%s]\n", d.Name, d.ID)
 					shutdownSequence(conf)
 				}
+
 				deviceMap[d] = now
 			}
 
@@ -74,6 +75,7 @@ func main() {
 					log.Printf("Device %s [%s]  has been removed\n", d.Name, d.ID)
 					shutdownSequence(conf)
 				}
+
 			}
 		case <-sigint:
 			log.Println("SIGINT received")