NAME

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

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <unistd.h>

int
getdomainname(char *name, size_t namelen);

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

DESCRIPTION

getdomainname() returns the standard 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 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

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.

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 domain name and was not the super-user.

SEE ALSO

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

HISTORY

The getdomainname function call appeared in 4.2BSD.

BUGS

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