getdomainname man page on Ultrix

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getdomainname(2yp)					    getdomainname(2yp)

       getdomainname, setdomainname - get or set name of current domain

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

       The  system  call  returns the domain name of the current processor, as
       set by

       The system call sets the domain of the host machine to be  name,	 which
       has  a  length specified by namelen.  This system call is restricted to
       the superuser and is normally  used  only  when	the  system  is	 boot‐

       The  purpose  of	 domains  is to allow merging of two distinct networks
       that have common host names.  Each network can be distinguished by hav‐
       ing  a  different  domain  name.	  At the current time, only the Yellow
       Pages service makes use of domains.

       The name argument is the address where the name of the  current	domain
       is stored.

       The  namelen  argument  specifies  the  size  of	 the  name array.  The
       returned name is null-terminated unless insufficient space is provided.

       Domain names are limited to 31 characters.

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 loca‐
       tion, errno.

       [EFAULT]	      The name parameter contains an invalid address.

       [EPERM]	      The caller was not the superuser.	  This	error  message
		      only applies to the system call.


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