1#include <string.h>
 2#include <libgen.h>
 3
 4char *dirname(char *s)
 5{
 6	size_t i;
 7	if (!s || !*s) return ".";
 8	i = strlen(s)-1;
 9	for (; s[i]=='/'; i--) if (!i) return "/";
10	for (; s[i]!='/'; i--) if (!i) return ".";
11	for (; s[i]=='/'; i--) if (!i) return "/";
12	s[i+1] = 0;
13	return s;
14}