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269 lines
8.0 KiB
C
269 lines
8.0 KiB
C
/*
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* Harbour Project source code:
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* environment variables access
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*
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* Copyright 2001-2002 Antonio Linares <alinares@fivetech.com>
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* www - http://harbour-project.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING.txt. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
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*
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* As a special exception, the Harbour Project gives permission for
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* additional uses of the text contained in its release of Harbour.
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*
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* The exception is that, if you link the Harbour libraries with other
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* files to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the Harbour library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the Harbour
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* Project under the name Harbour. If you copy code from other
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* Harbour Project or Free Software Foundation releases into a copy of
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* Harbour, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for Harbour, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice.
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*
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*/
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/* NOTE: Notice that this code is needed as ANSI C getenv() crashes
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badly when used from a Windows DLL. */
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#include "hbapi.h"
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#if defined( HB_OS_WIN )
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#include <windows.h>
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#include "hbwinuni.h"
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#if defined( HB_OS_WIN_CE )
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#include "hbwince.h"
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#endif
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#elif defined( HB_OS_OS2 )
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#define INCL_DOSMISC
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#define INCL_ERRORS
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#include <os2.h>
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#elif defined( __FreeBSD__ )
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#include <sys/param.h>
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#endif
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/* NOTE: Warning, this function _may_ return NULL as a result if
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the environment variable reading fails form some reason.
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If the return value is not NULL, the caller must free
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the pointer. [vszakats] */
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char * hb_getenv( const char * szName )
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{
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char * pszBuffer = NULL;
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#if defined( HB_OS_WIN )
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{
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LPTSTR lpName = HB_CHARDUP( szName );
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DWORD size = GetEnvironmentVariable( lpName, NULL, 0 );
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if( size != 0 )
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{
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LPTSTR lpBuffer = ( LPTSTR ) hb_xgrab( size * sizeof( TCHAR ) );
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GetEnvironmentVariable( lpName, lpBuffer, size );
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pszBuffer = HB_OSSTRDUP( lpBuffer );
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hb_xfree( lpBuffer );
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}
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hb_xfree( lpName );
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}
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#elif defined( HB_OS_OS2 )
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{
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PSZ EnvValue = ( PSZ ) "";
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char * pszNameFree = NULL;
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szName = hb_osEncodeCP( szName, &pszNameFree, NULL );
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if( DosScanEnv( ( PCSZ ) szName, &EnvValue ) == NO_ERROR )
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pszBuffer = hb_osStrDecode( ( char * ) EnvValue );
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if( pszNameFree )
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hb_xfree( pszNameFree );
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}
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#else
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{
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char * pszTemp, * pszNameFree = NULL;
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szName = hb_osEncodeCP( szName, &pszNameFree, NULL );
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pszTemp = getenv( szName );
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if( pszNameFree )
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hb_xfree( pszNameFree );
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if( pszTemp != NULL )
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pszBuffer = hb_osStrDecode( pszTemp );
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}
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#endif
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return pszBuffer;
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}
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HB_BOOL hb_getenv_buffer( const char * szName, char * szBuffer, int nSize )
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{
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HB_BOOL fRetVal;
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#if defined( HB_OS_WIN )
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{
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LPTSTR lpName = HB_CHARDUP( szName ), lpBuffer;
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if( szBuffer != NULL || nSize > 0 )
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lpBuffer = ( LPTSTR ) hb_xgrab( nSize * sizeof( TCHAR ) );
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else
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lpBuffer = NULL;
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fRetVal = GetEnvironmentVariable( lpName, lpBuffer, nSize ) != 0;
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if( lpBuffer )
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{
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if( fRetVal )
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{
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lpBuffer[ nSize - 1 ] = TEXT( '\0' );
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HB_OSSTRDUP2( lpBuffer, szBuffer, nSize - 1 );
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}
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hb_xfree( lpBuffer );
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}
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hb_xfree( lpName );
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}
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#elif defined( HB_OS_OS2 )
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{
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PSZ EnvValue = ( PSZ ) "";
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char * pszNameFree = NULL;
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szName = hb_osEncodeCP( szName, &pszNameFree, NULL );
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fRetVal = DosScanEnv( ( PCSZ ) szName, &EnvValue ) == NO_ERROR;
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if( pszNameFree )
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hb_xfree( pszNameFree );
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if( fRetVal && szBuffer != NULL && nSize != 0 )
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hb_osStrDecode2( ( char * ) EnvValue, szBuffer, nSize - 1 );
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}
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#else
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{
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char * pszTemp, * pszNameFree = NULL;
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szName = hb_osEncodeCP( szName, &pszNameFree, NULL );
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pszTemp = getenv( szName );
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if( pszNameFree )
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hb_xfree( pszNameFree );
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if( pszTemp != NULL )
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{
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fRetVal = HB_TRUE;
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if( szBuffer != NULL && nSize != 0 )
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hb_osStrDecode2( pszTemp, szBuffer, nSize - 1 );
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}
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else
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fRetVal = HB_FALSE;
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}
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#endif
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if( ! fRetVal && szBuffer != NULL && nSize != 0 )
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szBuffer[ 0 ] = '\0';
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return fRetVal;
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}
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/* set current process environment variable, if szValue is NULL delete
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* environment variable
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*/
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HB_BOOL hb_setenv( const char * szName, const char * szValue )
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{
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if( szName == NULL )
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return HB_FALSE;
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#if defined( HB_OS_WIN )
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{
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LPTSTR lpName = HB_CHARDUP( szName );
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LPTSTR lpValue = szValue ? HB_CHARDUP( szValue ) : NULL;
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HB_BOOL fResult = ( SetEnvironmentVariable( lpName, lpValue ) != 0 );
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if( lpValue )
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hb_xfree( lpValue );
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hb_xfree( lpName );
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return fResult;
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}
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#elif defined( _BSD_SOURCE ) || _POSIX_C_SOURCE >= 200112L || \
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_XOPEN_SOURCE >= 600 || \
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defined( __WATCOMC__ ) || defined( __DJGPP__ ) || \
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defined( HB_OS_SUNOS ) || defined( HB_OS_BSD ) || \
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defined( HB_OS_DARWIN ) || defined( HB_OS_BEOS ) || \
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defined( HB_OS_QNX ) || defined( HB_OS_VXWORKS ) || \
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defined( HB_OS_CYGWIN ) || defined( HB_OS_MINIX ) || \
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defined( HB_OS_ANDROID )
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{
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HB_BOOL fResult;
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char * pszNameFree = NULL, * pszValueFree = NULL;
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szName = hb_osEncodeCP( szName, &pszNameFree, NULL );
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if( szValue )
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{
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szValue = hb_osEncodeCP( szValue, &pszValueFree, NULL );
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fResult = setenv( szName, szValue, 1 ) == 0;
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if( pszValueFree )
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hb_xfree( pszValueFree );
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}
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else
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{
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# if ( defined( __DJGPP__ ) && \
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( __DJGPP__ < 2 || ( __DJGPP__ == 2 && __DJGPP_MINOR__ < 4 ) ) ) || \
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defined( __WATCOMC__ )
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szValue = getenv( szName );
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if( szValue && *szValue )
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fResult = setenv( szName, "", 1 ) == 0;
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else
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fResult = HB_TRUE;
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# elif defined( __OpenBSD__ ) || defined( HB_OS_QNX ) || \
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( defined( __FreeBSD_version ) && __FreeBSD_version < 700050 ) || \
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( defined( HB_OS_DARWIN ) && !( defined( __DARWIN_UNIX03 ) && __DARWIN_UNIX03 ) )
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unsetenv( szName );
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fResult = HB_TRUE;
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# else
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fResult = unsetenv( szName ) == 0;
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# endif
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}
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if( pszNameFree )
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hb_xfree( pszNameFree );
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return fResult;
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}
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#elif defined( _HB_NO_SETENV_ )
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HB_SYMBOL_UNUSED( szValue );
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return HB_FALSE;
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#else
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/* please add support for other C compilers
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* if such functionality does not exists for given platform/C compiler
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* then please simply added C compiler with necessary OS/version checking
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* to the above #elif ... to eliminate warning [druzus]
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*/
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int iTODO;
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HB_SYMBOL_UNUSED( szValue );
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return HB_FALSE;
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#endif
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}
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