1 #define _BSD_SOURCE 2 #include <string.h> 3 strlcat(char * d,const char * s,size_t n)4 size_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