Better logging + runVM impl

utils/utils.go

@@ -1,6 +1,7 @@
 package utils
 
 import (
+	"regexp"
 	"strings"
 	"unicode"
 )
@@ -13,3 +14,12 @@ func ClearUnprintableChars(s string) string {
 		return -1
 	}, s)
 }
+
+var devNameRegexp = regexp.MustCompile("^[0-9a-z_-]+$")
+
+func ValidateDevName(s string) bool {
+	// Allow mapped devices.
+	s = strings.TrimPrefix(s, "mapper/")
+
+	return devNameRegexp.MatchString(s)
+}