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