multiple testing concepts

cmd/unix/main.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"fmt"
+	"unsafe"
+
+	"golang.org/x/sys/unix"
+)
+
+const (
+	RNDGETENTCNT int = 0x80045200
+)
+
+func main() {
+	var (
+		fd  int
+		err error
+	)
+
+	if fd, err = unix.Open("/dev/random", unix.O_RDONLY, 0); err != nil {
+		fmt.Printf("Error: %v\n", err)
+	}
+	defer unix.Close(fd)
+
+	var (
+		ent int
+	)
+	_, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(fd), uintptr(RNDGETENTCNT), uintptr(unsafe.Pointer(&ent)))
+	if errno != 0 {
+		fmt.Printf("Error: %v\n", errno)
+	}
+
+	fmt.Printf("Available Entropy: %v\n", ent)
+}