human readable timestamp in c

timestamp.c

char *timestamp()
{
    struct tm *local;
    time_t t = time(NULL);
    char *str;

    /* Get the localtime */
    local = localtime(&t);
    str = asctime(local);

    int i = 0;
    int len = strlen(str) + 1;

    for (i = 0; i < len; i++)
    {
        if (str[i] == '\n')
        {
            /* Move all the char following the char "\n" by one to the left. */
            strncpy(&str[i], &str[i + 1], len - i);
        }
    }

    return str;
}