ref: 2cb45ba7f64f83e48609b47218c8fb70cbaced5b
dir: /sys/src/libc/port/runestrdup.c/
#include <u.h>
#include <libc.h>
Rune*
runestrdup(Rune *s)
{
	Rune *ns;
	ns = malloc(sizeof(Rune)*(runestrlen(s) + 1));
	if(ns == 0)
		return 0;
	setmalloctag(ns, getcallerpc(&s));
	return runestrcpy(ns, s);
}