getdomainname(NS)

getdomainname, setdomainname -- get/set name of current domain

Syntax

cc ... -lsocket

getdomainname(name, namelen)
char *name;
int namelen;

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 name array. 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 booted.

The purpose of domains is to enable two or more distinct networks that may have host names in common to be merged. The networks would be distinguished by their domain names. Currently, only the Network Information Service makes use of domains.

NOTE: All routines in librpc and libyp have been incorporated into libsocket. libyp and libsocket have been retained so that existing Makefiles will continue to work. New code should be linked with libsocket.

Return values

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.

Diagnostics

The following errors may be returned by these calls:

[EFAULT]: The name parameter gave an invalid address
[EINVAL]: The namelen parameter contains over 64 characters. This error only applies to setdomainname.
[EPERM]: The caller was not the super user. This error only applies to setdomainname.

Limitations

Domain names are limited to 64 characters.