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70 lines
2.5 KiB
C
70 lines
2.5 KiB
C
/****************************************************************************
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*
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* Open Watcom Project
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*
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* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
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*
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* ========================================================================
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*
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* This file contains Original Code and/or Modifications of Original
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* Code as defined in and that are subject to the Sybase Open Watcom
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* Public License version 1.0 (the 'License'). You may not use this file
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* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
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* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
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* provided with the Original Code and Modifications, and is also
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* available at www.sybase.com/developer/opensource.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
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* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
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* NON-INFRINGEMENT. Please see the License for the specific language
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* governing rights and limitations under the License.
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*
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* ========================================================================
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*
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* Description: Implementation of clearenv() - clear the environment.
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*
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****************************************************************************/
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#include "variety.h"
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#include <stdlib.h>
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#include <env.h>
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#include "liballoc.h"
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#include "rtdata.h"
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/* Note - clearenv() is always called at library exit */
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_WCRTLINK int (clearenv)( void )
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{
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#ifndef __NETWARE__
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char **envp;
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char *env_str;
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int index;
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if( _RWD_environ != NULL ) {
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for( envp = _RWD_environ; env_str = *envp; ++envp ) {
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if( _RWD_env_mask != NULL ) {
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index = envp - _RWD_environ;
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if( _RWD_env_mask[ index ] != 0 ) {
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lib_free( (void *)env_str );
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}
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*envp = NULL;
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}
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}
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if( _RWD_env_mask != NULL ) {
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lib_free( _RWD_environ );
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}
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envp = lib_malloc( sizeof(char *) + sizeof(char) );
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if( envp == NULL ) return( -1 );
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_RWD_environ = envp;
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*_RWD_environ = NULL;
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_RWD_env_mask = ((char *)envp) + sizeof(char *);
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*_RWD_env_mask = 0;
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}
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#endif
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return( 0 ); /* success */
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}
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