GETDOMAINNAME(3) | Library Functions Manual | GETDOMAINNAME(3)

# 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.

May 6, 1994 | NetBSD 9.2