NAME

getdomainname, setdomainname — get/set NIS domain name of current host

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <unistd.h>

int
getdomainname(char *name, int namelen);

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

DESCRIPTION

Getdomainname() returns the standard NIS domain name for the current host, 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 NIS 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.

RETURN VALUES

Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the error.

ERRORS

The following errors may be returned by these calls:

[EFAULT]

The name or namelen parameter gave an invalid address.

[EPERM]

The caller tried to set the hostname and was not the super-user.

SEE ALSO

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

BUGS

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

HISTORY

The getdomainname() function call appeared in 4.2BSD.