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GETDOMAINNAME(2)	   Linux Programmer's Manual	      GETDOMAINNAME(2)

NAME
       getdomainname, setdomainname - get/set NIS domain name

SYNOPSIS
       #include	<unistd.h>

       int getdomainname(char *name, size_t len);
       int setdomainname(const char *name, size_t len);

   Feature Test	Macro Requirements for glibc (see feature_test_macros(7)):

       getdomainname(),	setdomainname():
	   _BSD_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500)

DESCRIPTION
       These  functions	are used to access or to change	the NIS	domain name of
       the host	system.

       setdomainname() sets the	domain name to the value given in the  charac-
       ter  array  name.   The	len  argument specifies	the number of bytes in
       name.  (Thus, name does not require a terminating null byte.)

       getdomainname() returns the null-terminated domain name in the  charac-
       ter  array  name,  which	has a length of	len bytes.  If the null-termi-
       nated domain name requires more than len	bytes, getdomainname() returns
       the first len bytes (glibc) or gives an error (libc).

RETURN VALUE
       On  success,  zero is returned.	On error, -1 is	returned, and errno is
       set appropriately.

ERRORS
       setdomainname() can fail	with the following errors:

       EFAULT name pointed outside of user address space.

       EINVAL len was negative or too large.

       EPERM  the caller is unprivileged (Linux: does not have the CAP_SYS_AD-
	      MIN capability).

       getdomainname() can fail	with the following errors:

       EINVAL For  getdomainname()  under libc:	name is	NULL or	name is	longer
	      than len bytes.

CONFORMING TO
       POSIX does not specify these calls.

NOTES
       Since Linux 1.0,	the limit on the length	of a  domain  name,  including
       the  terminating	 null  byte,  is 64 bytes.  In older kernels, it was 8
       bytes.

       On most Linux architectures (including x86),  there  is	no  getdomain-
       name()  system call; instead, glibc implements getdomainname() as a li-
       brary function that returns a copy of  the  domainname  field  returned
       from a call to uname(2).

SEE ALSO
       gethostname(2), sethostname(2), uname(2)

COLOPHON
       This  page  is  part of release 3.74 of the Linux man-pages project.  A
       description of the project, information about reporting bugs,  and  the
       latest	  version     of     this    page,    can    be	   found    at
       http://www.kernel.org/doc/man-pages/.

Linux				  2012-10-25		      GETDOMAINNAME(2)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | CONFORMING TO | NOTES | SEE ALSO | COLOPHON

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