Bindable functions take a boolean as flag.

Emphasize which one always return TRUE.
Use mloutfail() to introduce consistency when a function fails with error message.

util.c

@@ -1,17 +1,20 @@
+/* util.c -- implements util.h */
 #include "util.h"
 
 /* Safe zeroing, no complaining about overlap */
-void mystrscpy(char *dst, const char *src, int size)
-{
-	if (!size)
-		return;
-	while (--size) {
-		char c = *src++;
-		if (!c)
-			break;
-		*dst++ = c;
+void mystrscpy( char *dst, const char *src, int size) {
+	if( size <= 0)
+		return ;
+
+	while( --size) {
+		char c = *src++ ;
+		if( !c)
+			break ;
+
+		*dst++ = c ;
 	}
-	*dst = 0;
+
+	*dst = 0 ;
 }
 
-
+/* end of util.c */