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<h1>gethostname.h</h1><a href="a00103.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* Package : omniEvents</span>
<a name="l00002"></a>00002 <span class="comment"> * gethostname.h Created : 2003/10/31</span>
<a name="l00003"></a>00003 <span class="comment"> * Author : Alex Tingle</span>
<a name="l00004"></a>00004 <span class="comment"> *</span>
<a name="l00005"></a>00005 <span class="comment"> * Copyright (C) 2003 Alex Tingle.</span>
<a name="l00006"></a>00006 <span class="comment"> *</span>
<a name="l00007"></a>00007 <span class="comment"> * This file is part of the omniEvents application.</span>
<a name="l00008"></a>00008 <span class="comment"> *</span>
<a name="l00009"></a>00009 <span class="comment"> * omniEvents is free software; you can redistribute it and/or</span>
<a name="l00010"></a>00010 <span class="comment"> * modify it under the terms of the GNU Lesser General Public</span>
<a name="l00011"></a>00011 <span class="comment"> * License as published by the Free Software Foundation; either</span>
<a name="l00012"></a>00012 <span class="comment"> * version 2.1 of the License, or (at your option) any later version.</span>
<a name="l00013"></a>00013 <span class="comment"> *</span>
<a name="l00014"></a>00014 <span class="comment"> * omniEvents is distributed in the hope that it will be useful,</span>
<a name="l00015"></a>00015 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00016"></a>00016 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00017"></a>00017 <span class="comment"> * Lesser General Public License for more details.</span>
<a name="l00018"></a>00018 <span class="comment"> *</span>
<a name="l00019"></a>00019 <span class="comment"> * You should have received a copy of the GNU Lesser General Public</span>
<a name="l00020"></a>00020 <span class="comment"> * License along with this library; if not, write to the Free Software</span>
<a name="l00021"></a>00021 <span class="comment"> * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</span>
<a name="l00022"></a>00022 <span class="comment"> */</span>
<a name="l00023"></a>00023
<a name="l00030"></a>00030 <span class="preprocessor">#ifndef __GETHOSTNAME_H</span>
<a name="l00031"></a>00031 <span class="preprocessor"></span><span class="preprocessor">#define __GETHOSTNAME_H</span>
<a name="l00032"></a>00032 <span class="preprocessor"></span>
<a name="l00033"></a>00033 <span class="preprocessor">#ifdef HAVE_CONFIG_H</span>
<a name="l00034"></a>00034 <span class="preprocessor"></span><span class="preprocessor"># include "<a class="code" href="a00083.html">config.h</a>"</span>
<a name="l00035"></a>00035 <span class="preprocessor">#endif</span>
<a name="l00036"></a>00036 <span class="preprocessor"></span>
<a name="l00037"></a>00037 <span class="preprocessor">#ifdef HAVE_UNISTD_H</span>
<a name="l00038"></a>00038 <span class="preprocessor"></span><span class="preprocessor"># include <unistd.h></span>
<a name="l00039"></a>00039 <span class="preprocessor">#endif</span>
<a name="l00040"></a>00040 <span class="preprocessor"></span>
<a name="l00041"></a>00041 <span class="preprocessor">#ifdef SYS_UTSNAME_H</span>
<a name="l00042"></a>00042 <span class="preprocessor"></span><span class="preprocessor"># include <sys/utsname.h></span>
<a name="l00043"></a>00043 <span class="preprocessor">#endif</span>
<a name="l00044"></a>00044 <span class="preprocessor"></span>
<a name="l00045"></a>00045 <span class="preprocessor">#ifdef __WIN32__</span>
<a name="l00046"></a>00046 <span class="preprocessor"></span><span class="preprocessor"># include <winbase.h></span>
<a name="l00047"></a>00047 <span class="preprocessor">#endif</span>
<a name="l00048"></a>00048 <span class="preprocessor"></span>
<a name="l00049"></a>00049 <span class="preprocessor">#if defined(__VMS) && __CRTL_VER < 70000000</span>
<a name="l00050"></a>00050 <span class="preprocessor"></span><span class="preprocessor"># include <omniVMS/utsname.hxx></span>
<a name="l00051"></a>00051 <span class="preprocessor">#endif</span>
<a name="l00052"></a>00052 <span class="preprocessor"></span>
<a name="l00053"></a>00053 <span class="preprocessor">#include <errno.h></span>
<a name="l00054"></a>00054
<a name="l00055"></a>00055 <span class="comment">/*</span>
<a name="l00056"></a>00056 <span class="comment"> * Ensure that MAXHOSTNAMELEN is defined correctly.</span>
<a name="l00057"></a>00057 <span class="comment"> */</span>
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="preprocessor">#if defined(__WIN32__) && !defined(MAXHOSTNAMELEN)</span>
<a name="l00060"></a>00060 <span class="preprocessor"></span><span class="preprocessor"># define MAXHOSTNAMELEN MAX_COMPUTERNAME_LENGTH</span>
<a name="l00061"></a>00061 <span class="preprocessor"></span><span class="preprocessor">#elif defined(__WIN32__) && defined(MAXHOSTNAMELEN)</span>
<a name="l00062"></a>00062 <span class="preprocessor"></span><span class="preprocessor"># undef MAXHOSTNAMELEN</span>
<a name="l00063"></a>00063 <span class="preprocessor"></span><span class="preprocessor"># define MAXHOSTNAMELEN MAX_COMPUTERNAME_LENGTH</span>
<a name="l00064"></a>00064 <span class="preprocessor"></span><span class="preprocessor">#elif !defined(MAXHOSTNAMELEN)</span>
<a name="l00065"></a><a class="code" href="a00103.html#a0">00065</a> <span class="preprocessor"></span><span class="preprocessor"># define MAXHOSTNAMELEN 256</span>
<a name="l00066"></a>00066 <span class="preprocessor"></span><span class="comment">/* Apparently on some AIX versions, MAXHOSTNAMELEN is too small (32) to</span>
<a name="l00067"></a>00067 <span class="comment"> * reflect the true size a hostname can be. Check and fix the value. */</span>
<a name="l00068"></a>00068 <span class="preprocessor">#elif defined(MAXHOSTNAMELEN) && (MAXHOSTNAMELEN < 64)</span>
<a name="l00069"></a>00069 <span class="preprocessor"></span><span class="preprocessor"># undef MAXHOSTNAMELEN</span>
<a name="l00070"></a>00070 <span class="preprocessor"></span><span class="preprocessor"># define MAXHOSTNAMELEN 256</span>
<a name="l00071"></a>00071 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00072"></a>00072 <span class="preprocessor"></span>
<a name="l00073"></a>00073
<a name="l00074"></a>00074 <span class="preprocessor">#ifndef HAVE_GETHOSTNAME</span>
<a name="l00075"></a>00075 <span class="preprocessor"></span><span class="keyword">inline</span> <span class="keywordtype">int</span>
<a name="l00076"></a><a class="code" href="a00103.html#a1">00076</a> <a class="code" href="a00103.html#a1">gethostname</a>(<span class="keywordtype">char</span>* hostname, size_t len)
<a name="l00077"></a>00077 {
<a name="l00078"></a>00078 <span class="keywordtype">int</span> result =-1;
<a name="l00079"></a>00079 <span class="keywordflow">if</span>(len<1)
<a name="l00080"></a>00080 {
<a name="l00081"></a>00081 errno=EINVAL;
<a name="l00082"></a>00082 <span class="keywordflow">return</span> result;
<a name="l00083"></a>00083 }
<a name="l00084"></a>00084 <span class="keywordflow">if</span>(len><a class="code" href="a00103.html#a0">MAXHOSTNAMELEN</a>)
<a name="l00085"></a>00085 {
<a name="l00086"></a>00086 len=<a class="code" href="a00103.html#a0">MAXHOSTNAMELEN</a>;
<a name="l00087"></a>00087 }
<a name="l00088"></a>00088
<a name="l00089"></a>00089 <span class="preprocessor">#if defined(__WIN32__)</span>
<a name="l00090"></a>00090 <span class="preprocessor"></span> DWORD dwordlen = len;
<a name="l00091"></a>00091 <span class="keywordflow">if</span>( GetComputerName((LPTSTR) hostname, &dwordlen) )
<a name="l00092"></a>00092 {
<a name="l00093"></a>00093 result=0;
<a name="l00094"></a>00094 }
<a name="l00095"></a>00095 <span class="keywordflow">else</span>
<a name="l00096"></a>00096 {
<a name="l00097"></a>00097 errno=EFAULT;
<a name="l00098"></a>00098 }
<a name="l00099"></a>00099 <span class="preprocessor">#else</span>
<a name="l00100"></a>00100 <span class="preprocessor"></span> <span class="keyword">struct </span>utsname un;
<a name="l00101"></a>00101 <span class="keywordflow">if</span>( uname(&un)==0 && strlen(un.nodename)<len)
<a name="l00102"></a>00102 {
<a name="l00103"></a>00103 strcpy(hostname,un.nodename);
<a name="l00104"></a>00104 result=0;
<a name="l00105"></a>00105 }
<a name="l00106"></a>00106 <span class="keywordflow">else</span>
<a name="l00107"></a>00107 {
<a name="l00108"></a>00108 errno=EFAULT;
<a name="l00109"></a>00109 }
<a name="l00110"></a>00110 <span class="preprocessor">#endif</span>
<a name="l00111"></a>00111 <span class="preprocessor"></span> <span class="keywordflow">return</span> result;
<a name="l00112"></a>00112 }
<a name="l00113"></a>00113 <span class="preprocessor">#endif </span><span class="comment">/* HAVE_GETHOSTNAME */</span>
<a name="l00114"></a>00114
<a name="l00115"></a>00115 <span class="preprocessor">#endif </span><span class="comment">/* __GETHOSTNAME_H */</span>
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Fri Aug 26 20:56:14 2005 for OmniEvents by
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