.\" Copyright (c) 1983 The Regents of the University of California. .\" All rights reserved. .\" .\" Redistribution and use in source and binary forms are permitted .\" provided that the above copyright notice and this paragraph are .\" duplicated in all such forms and that any documentation, .\" advertising materials, and other materials related to such .\" distribution and use acknowledge that the software was developed .\" by the University of California, Berkeley. The name of the .\" University may not be used to endorse or promote products derived .\" from this software without specific prior written permission. .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR .\" IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED .\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. .\" .\" @(#)gethostname.3 6.5 (Berkeley) %G% .\" .TH GETHOSTNAME 2 "" .UC 5 .SH NAME gethostname, sethostname \- get/set name of current host .SH SYNOPSIS .nf .ft B gethostname(name, namelen) char *name; int namelen; .PP .ft B sethostname(name, namelen) char *name; int namelen; .fi .SH DESCRIPTION .I Gethostname returns the standard host name for the current processor, as previously set by .IR sethostname . The parameter .I namelen specifies the size of the .I name array. The returned name is null-terminated unless insufficient space is provided. .PP .I Sethostname sets the name of the host machine to be .IR name , which has length .IR namelen . This call is restricted to the super-user and is normally used only when the system is bootstrapped. .SH "RETURN VALUE If the call succeeds a value of 0 is returned. If the call fails, then a value of \-1 is returned and an error code is placed in the global location \fIerrno\fP. .SH "ERRORS The following errors may be returned by these calls: .TP 15 [EFAULT] The \fIname\fP or \fInamelen\fP parameter gave an invalid address. .TP 15 [EPERM] The caller tried to set the hostname and was not the super-user. .SH SEE ALSO gethostid(2) .SH BUGS Host names are limited to MAXHOSTNAMELEN (from .IR ) characters, currently 64.