Dump9660 (and mk9660). Until we either do something

intelligent with symlinks or put in a switch for things
like dump9660, this is of rather limited utility under Unix.

src/cmd/9660/rune.c

@@ -0,0 +1,39 @@
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+#include <libsec.h>
+
+#include "iso9660.h"
+
+Rune*
+strtorune(Rune *r, char *s)
+{
+	Rune *or;
+
+	if(s == nil)
+		return nil;
+
+	or = r;
+	while(*s)
+		s += chartorune(r++, s);
+	*r = L'\0';
+	return or;
+}
+
+Rune*
+runechr(Rune *s, Rune c)
+{
+	for(; *s; s++)
+		if(*s == c)
+			return s;
+	return nil;
+}
+
+int
+runecmp(Rune *s, Rune *t)
+{
+	while(*s && *t && *s == *t)
+		s++, t++;
+	return *s - *t;
+}
+