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#include <string.h>
#include <libgen.h>
char *dirname(char *s)
{
size_t i;
if (!s || !*s) return ".";
i = strlen(s)-1;
for (; s[i]=='/'; i--) if (!i) return "/";
for (; s[i]!='/'; i--) if (!i) return ".";
for (; s[i]=='/'; i--) if (!i) return "/";
s[i+1] = 0;
return s;
}
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