getdomainname(NS) 6 January 1993 getdomainname(NS) Name getdomainname, setdomainname - get/set name of current domain Syntax 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 nor- mally used only when the system is booted. The purpose of domains is to enable two or more distinct networks that may have identical host names in common to be merged. The networks would be distinguished by their domain names. Currently, only the network in- formation service makes use of domains. 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 loca- tion 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. Bugs Domain names are limited to 64 characters.