NAME

getdomainname, setdomainname − get/set name of current domain

SYNOPSIS

int getdomainname(name, namelen)
char ∗name;
int namelen;
int setdomainname(name, namelen)
char ∗name;
int namelen;

DESCRIPTION

getdomainname() returns the name of the domain for the current processor, as previously set by setdomainname.  The parameter namelen specifies the size of the array pointed to by name. The returned name is null-terminated unless insufficient space is provided.

setdomainname() sets the domain of the host machine to be name, which has length namelen. This call is restricted to the super-user and is normally used only when the system is bootstrapped.

The purpose of domains is to enable two distinct groups of machines that may have host names in common to communicate with each other.  Each group of machines would be distinguished by having a different domain name.  At the current time, the results of getdomainname() are interpreted as YP domain names.  Internet (mail) domain names are derived from these using the “Hidden Domain Name” convention explained in System and Network Administration.

RETURN VALUE

If the call succeeds a value of 0 is returned.  If the call fails, then a value of −1 is returned and an error code is placed in the global location errno. 

ERRORS

The following errors may be returned by these calls:

EFAULT The name parameter gave an invalid address. 

EPERM The caller was not the super-user.  This error only applies to setdomainname. 

SEE ALSO

System and Network Adminstration

BUGS

Domain names are limited to 64 characters, but many applications support 31 or less. 

Sun Release 4.0  —  Last change: 5 July 1989