1#define _BSD_SOURCE 2#include <string.h> 3 4size_t strlcat(char *d, const char *s, size_t n) 5{ 6 size_t l = strnlen(d, n); 7 if (l == n) return l + strlen(s); 8 return l + strlcpy(d+l, s, n-l); 9} 10