GETDOMAINNAME(2) System Calls Manual GETDOMAINNAME(2)
getdomainname, setdomainname - get/set name of current domain
int getdomainname(name, namelen)
int setdomainname(name, namelen)
getdomainname() returns the name of the domain for the current proces-
sor, as previously set by setdomainname. The parameter namelen speci-
fies 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 networks that may have
host names in common to merge. Each network would be distinguished by
having a different domain name. At the current time, only the Network
Information Service (NIS) and sendmail(8) make use of domains.
getdomainname() and setdomainname() return:
0 on success.
-1 on failure and set errno to indicate the error.
EFAULT The name parameter gave an invalid address.
In addition to the above, setdomainname() will fail if:
EPERM The caller was not the super-user.
Domain names are limited to 64 characters.
The Network Information Service (NIS) was formerly known as Sun Yellow
Pages (YP). The functionality of the two remains the same; only the
name has changed.
21 January 1990 GETDOMAINNAME(2)