#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main(void)
{
        char *buf5;
        char *buf20;
        char *s1 = "01234567890";
        char *s2 = "abcdefghijklmnopqrstuvwxyz";
        int len;

        buf5 = malloc(5);
        if (buf5 == NULL) {
                perror("malloc");
                exit(1);
        }

        buf20 = malloc(20);
        if (buf20 == NULL) {
                perror("malloc");
                exit(1);
        }

        len = strlcpy(buf5, s1, 5);
        printf("copy to buf5:  s1=\"%s\", len-s1=%d, str-in-buf=\"%s\", len-str-in-buf=%ld\n",
               s1, len, buf5, strlen(buf5));

        len = strlcpy(buf20, s1, 20);
        printf("copy to buf20: s1=\"%s\", len-s1=%d, str-in-buf=\"%s\", len-str-in-buf=%ld\n",
               s1, len, buf20, strlen(buf20));

        len = strlcat(buf20, s2, 20);
        printf("cat  to buf20: s2=\"%s\", len-s1s2=%d, str-in-buf=\"%s\", len-str-in-buf=%ld\n",
               s2, len, buf20, strlen(buf20));

        free(buf5);
        free(buf20);

        return 0;
}