152 lines
5.2 KiB
C
152 lines
5.2 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: This function searches for the specified file in the
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* 1) current directory or, failing that,
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* 2) the paths listed in the specified environment variable
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* until it finds the first occurrence of the file.
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*
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****************************************************************************/
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#include "variety.h"
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#include "widechar.h"
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#undef __INLINE_FUNCTIONS__
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#ifndef __UNIX__
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#include <direct.h>
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#endif
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#include <string.h>
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#include "rtdata.h"
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#include "seterrno.h"
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#ifdef __WIDECHAR__
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#include "wenviron.h"
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#endif
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#if defined(__UNIX__)
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#ifdef __WIDECHAR__
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#define PATH_SEPARATOR L'/'
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#define LIST_SEPARATOR L':'
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#else
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#define PATH_SEPARATOR '/'
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#define LIST_SEPARATOR ':'
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#endif
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#else
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#ifdef __WIDECHAR__
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#define PATH_SEPARATOR L'\\'
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#define LIST_SEPARATOR L';'
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#else
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#define PATH_SEPARATOR '\\'
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#define LIST_SEPARATOR ';'
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#endif
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#endif
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_WCRTLINK void __F_NAME(_searchenv,_wsearchenv)( const CHAR_TYPE *name, const CHAR_TYPE *env_var, CHAR_TYPE *buffer )
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{
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CHAR_TYPE *p, *p2;
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int prev_errno;
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size_t len;
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#ifdef __WIDECHAR__
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if( _RWD_wenviron == NULL ) __create_wide_environment();
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#endif
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prev_errno = _RWD_errno;
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if( __F_NAME(access,_waccess)( name, F_OK ) == 0 ) {
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p = buffer; /* JBS 90/3/30 */
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len = 0; /* JBS 04/1/06 */
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for( ;; ) {
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if( name[0] == PATH_SEPARATOR ) break;
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if( name[0] == __F_NAME('.',L'.') ) break;
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#ifndef __UNIX__
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if( name[0] == __F_NAME('/',L'/') ) break;
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if( (name[0] != __F_NAME('\0',L'\0')) && (name[1] == __F_NAME(':',L':')) ) break;
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#endif
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__F_NAME(getcwd,_wgetcwd)( buffer, _MAX_PATH );
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len = __F_NAME(strlen,wcslen)( buffer );
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p = &buffer[ len ];
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if( p[-1] != PATH_SEPARATOR ) {
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if( len < (_MAX_PATH - 1) ) {
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*p++ = PATH_SEPARATOR;
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len++;
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}
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}
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break;
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}
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*p = __F_NAME('\0',L'\0');
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__F_NAME(strncat,wcsncat)( p, name, (_MAX_PATH - 1) - len );
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return;
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}
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p = __F_NAME(getenv,_wgetenv)( env_var );
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if( p != NULL ) {
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for( ;; ) {
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if( *p == __F_NAME('\0',L'\0') ) break;
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p2 = buffer;
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len = 0; /* JBS 04/1/06 */
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while( *p ) {
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if( *p == LIST_SEPARATOR ) break;
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if( *p != __F_NAME('"',L'"') ) {
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if( len < (_MAX_PATH-1) ) {
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*p2++ = *p; /* JBS 00/9/29 */
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len++;
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}
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}
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p++;
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}
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/* check for zero-length prefix which represents CWD */
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if( p2 != buffer ) { /* JBS 90/3/30 */
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if( p2[-1] != PATH_SEPARATOR
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#ifndef __UNIX__
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&& p2[-1] != __F_NAME('/','/')
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&& p2[-1] != __F_NAME(':',':')
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#endif
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) {
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if( len < (_MAX_PATH - 1) ) {
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*p2++ = PATH_SEPARATOR;
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len++;
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}
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}
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*p2 = __F_NAME('\0',L'\0');
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len += __F_NAME(strlen,wcslen)( name );/* JBS 04/12/23 */
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if( len < _MAX_PATH ) {
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__F_NAME(strcat,wcscat)( p2, name );
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/* check to see if file exists */
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if( __F_NAME(access,_waccess)( buffer, 0 ) == 0 ) {
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__set_errno( prev_errno );
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return;
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}
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}
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}
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if( *p == '\0' ) break;
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++p;
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}
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}
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buffer[0] = __F_NAME( '\0',L'\0' );
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}
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