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GETDOMAINNAME(3) Library Functions Manual GETDOMAINNAME(3)

getdomainname, setdomainnameget/set domain name of current host

library “libc”

#include <unistd.h>

int
getdomainname(char *name, size_t namelen);

int
setdomainname(const char *name, size_t namelen);

getdomainname() returns the standard domain name 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 name 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.

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

The following errors may be returned by these calls:

[]
The name or namelen parameter gave an invalid address.
[]
The caller tried to set the domain name and was not the super-user.

gethostid(3), gethostname(3), sysctl(3)

The getdomainname function call appeared in 4.2BSD.

Domain names are limited to MAXHOSTNAMELEN (from ⟨sys/param.h⟩) characters including null-termination, currently 256.

May 6, 1994 NetBSD-7.0.1