ref: fe8cd23a730b7d7a0f0db5f9d0745c93d502243a
dir: /sys/src/libc/9sys/rerrstr.c/
#include <u.h>
#include <libc.h>
void
rerrstr(char *buf, uint nbuf)
{
	char tmp[ERRMAX];
	tmp[0] = 0;
	errstr(tmp, sizeof tmp);
	utfecpy(buf, buf+nbuf, tmp);
	errstr(tmp, sizeof tmp);
}