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Re: gethostname question


On Thu, 2003-03-27 at 14:54, Jonathan Larmour wrote:
> Brent Eagles wrote:
> > Hi,
> > 
> > I know this has *got* to be a stupid question, but whats the story with
> > gethostname()?  Is it supported?  If not, what's the preferred way to
> > acquire the hostname? 
> 
> const char my_hostname[] = "foo.bar.com";
> #define gethostname() my_hostname
> 
> :-)
> 
> We should have it for the purposes of porting existing Unix code, but it's 
> not generally very appropriate for embedded systems which is why no-one's 
> ever considered it important enough to do.
> 

Here's what I did for a program that wanted to know it's host name,
Normally, the hostname is only used for connectivity, etc, so just 
using the IP address works well enough.

    static char _hostname[64];
    
    char *
    gethostname(char *buf, int len)
    {
        strcpy(buf, _hostname);
        return buf;
    }
    
    main()
    {
    ...
    #ifdef CYGHWR_NET_DRIVER_ETH0
        if (eth0_up) {
            inet_ntop(AF_INET, (void *)&eth0_bootp_data.bp_yiaddr, 
                      _hostname, sizeof(_hostname));
            printf("Setting hostname to: %s\n", _hostname);
        }
    #endif
    ...
    }
    
-- 
.--------------------------------------------------------.
|       Mind: Embedded Linux and eCos Development        |
|--------------------------------------------------------|
| Gary Thomas              email:  gary dot thomas at mind dot be   |
| Mind ( http://mind.be )  tel:    +1 (970) 229-1963     |
| gpg: http://www.chez-thomas.org/gary/gpg_key.asc       |
'--------------------------------------------------------'


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