67 lines
1.8 KiB
C++
67 lines
1.8 KiB
C++
/*************************************************************************\
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* Copyright (c) 2002 The University of Chicago, as Operator of Argonne
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* National Laboratory.
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* Copyright (c) 2002 The Regents of the University of California, as
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* Operator of Los Alamos National Laboratory.
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* EPICS BASE Versions 3.13.7
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* and higher are distributed subject to a Software License Agreement found
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* in file LICENSE that is included with this distribution.
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\*************************************************************************/
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/*
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*
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* L O S A L A M O S
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* Los Alamos National Laboratory
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* Los Alamos, New Mexico 87545
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*
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* Copyright, 1986, The Regents of the University of California.
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*
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* Author: Jeff Hill
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*/
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#include "osiSock.h"
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#include "localHostName.h"
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epicsSingleton < localHostName > localHostNameCache;
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localHostName::localHostName () :
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attachedToSockLib ( osiSockAttach () != 0 ), length ( 0u )
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{
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const char * pErrStr = "<unknown host>";
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int status = -1;
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if ( this->attachedToSockLib ) {
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status = gethostname (
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this->cache, sizeof ( this->cache ) );
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}
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if ( status ) {
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strncpy ( this->cache, pErrStr, sizeof ( this->cache ) );
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}
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this->cache [ sizeof ( this->cache ) - 1u ] = '\0';
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this->length = strlen ( this->cache );
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}
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localHostName::~localHostName ()
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{
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if ( this->attachedToSockLib ) {
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osiSockRelease ();
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}
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}
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unsigned localHostName::getName (
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char * pBuf, unsigned bufLength ) const
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{
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if ( bufLength ) {
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strncpy ( pBuf, this->cache, bufLength );
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if ( this->length < bufLength ) {
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return this->length;
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}
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else {
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unsigned reducedSize = bufLength - 1;
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pBuf [ reducedSize ] = '\0';
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return reducedSize;
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}
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}
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return 0u;
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}
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