Gets the name of the current domain.
Standard C Library (libc.a)
The getdomainname subroutine returns the name of the domain for the current processor as previously set by the setdomainname subroutine. The returned name is null-terminated unless insufficient space is provided.
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. Only the Network Information Service (NIS) and the sendmail command make use of domains.
All applications containing the getdomainname subroutine must be compiled with the _BSD macro set to a specific value. Acceptable values are 43 and 44. In addition, all socket applications must include the BSD libbsd.a library.
| Item | Description |
|---|---|
| Name | Specifies the domain name to be returned. |
| Namelen | Specifies the size of the array pointed to by the Name parameter. |
If the call succeeds, a value of 0 is returned. If the call is unsuccessful, a value of -1 is returned and an error code is placed in the errno global variable.
The following error may be returned by this subroutine:
| Value | Description |
|---|---|
| EFAULT | The Name parameter gave an invalid address. |