setdomainname man page on Scientific

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

       getdomainname, setdomainname - get/set domain name

       #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)

       These functions are used to access or to change the domain name of  the
       current processor.

       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).

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

       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_ADMIN capability).

       getdomainname() can fail with the following errors:

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

       POSIX does not specify these calls.

       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

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

       gethostname(2), sethostname(2), uname(2)

       This page is part of release 3.22 of the Linux  man-pages  project.   A
       description  of	the project, and information about reporting bugs, can
       be found at

Linux				  2008-11-27		      GETDOMAINNAME(2)

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