Why create a wrapper fo getaddrinfo()

Why do something like

Code:

---

struct addrinto *
host_serv(const char *host, const char *serv, int family, int socktype)
{
    int n;
    struct addrinfo hints, *res;
    bzero(&hints, sizeof(struct addrinfo));
    hints.ai_flags = AI_CANONNAME;
    hints.ai_famility = family;
    hints.ai_socktype = socktype;

    if( n =  getaddrinfo(host, serv, &hints, &res))  !=0)
          return (NULL);
   
    return (res);
}

---

And then call the function in main() like

Code:

---

struct addrinfo *ai;

ai = Host_serv(host, NULL, 0, 0);

---

Why not just call getaddrinfo() directly in main() like

Code:

---

struct addrinfo hints, *res;
bzero(&hints, sizeof(struct addrinfo));
hints.ai_flags = AI_CANONNAME;
hints.ai_famility = family;
hints.ai_socktype = socktype;

if( n =  getaddrinfo(host, serv, &hints, &res) !=0)
    return (NULL);

---

If I ask myself that question, the answer would be: convenience.
I'd rather call an easy function with a few params and get the data I require than fill out a troublesome struct and pass along.
It also makes the code cleaner and more structurized, if you ask me.

> Why not just call getaddrinfo() directly in main() like
Why write functions at all?

The point would be to keep main from becoming a massive bloated function which is impossible to maintain.

Even if it has only a dozen lines, and you only ever call it once from just one place, it's still an improvement.