Manual Pages  — GETDOMAINNAME

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

LIBRARY SYNOPSIS DESCRIPTION RETURN VALUES ERRORS SEE ALSO HISTORY BUGS

Standard C Library (libc, -lc)

#include <unistd.h>

int
getdomainname(char *name, int namelen);

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

The getdomainname() function returns the standard NIS domain name for the current host, as previously set by setdomainname(). The namelen argument specifies the size of the name array. The returned name is null-terminated unless insufficient space is provided.

The setdomainname() function 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.

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.

The following errors may be returned by these calls:

[EFAULT]
	The name or namelen argument gave an invalid address.
[EPERM]
	The caller tried to set the hostname and was not the super-user.

The getdomainname() function appeared in BSD 4.2 .

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