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769 lines
18 KiB
769 lines
18 KiB
/* demfcb.c - SVC handlers for misc. FCB operations
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*
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* demCloseFCB
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* demCreateFCB
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* demDate16
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* demDeleteFCB
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* demFCBIO
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* demGetFileInfo
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* demOpenFCB
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* demRenameFCB
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*
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* Modification History:
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*
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* Sudeepb 09-Apr-1991 Created
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* Sudeepb 21-Nov-1991 Added FCB based IO functions
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* Jonle 30-Jun-1994 add wild card support for fcb rename
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*/
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#include "dem.h"
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#include "demmsg.h"
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#include <softpc.h>
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#include <winbase.h>
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#include <mvdm.h>
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#define DOT '.'
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#define QMARK '?'
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/* demDeleteFCB - FCB based File Delete
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*
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*
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* Entry - Client (ES:DI) - Full File Path
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* Client (AL) - 0 if not extended FCB
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* Client (DL) - File Attr. to be deleted (valid only if Al !=0 )
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*
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* Exit
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* SUCCESS
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* Client (CF) = 0
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*
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* FAILURE
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* Client (CF) = 1
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* Client (AX) = system status code
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* HARD ERROR
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* Client (CF) = 1
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* Client (AX) = 0ffffh
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*
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* Notes: Following are the rules for FCB based delete:
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* 1. If normal FCB than dont allow delete on hidden,system files
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* 2. if extended FCB than search attributes should include hidden,
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* system or read-only if that kind of file is to be deleted.
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*/
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VOID demDeleteFCB (VOID)
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{
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HANDLE hFind;
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LPSTR lpFileName;
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BYTE bClientAttr=0;
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BOOL fExtendedFCB=FALSE;
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WIN32_FIND_DATA wfBuffer;
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BOOL fSuccess = FALSE;
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DWORD dwAttr;
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USHORT uErr;
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CHAR szPath_buffer[_MAX_PATH];
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CHAR szDrive[_MAX_DRIVE];
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CHAR szDir[_MAX_DIR];
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CHAR szFname[_MAX_FNAME];
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CHAR szExt[_MAX_EXT];
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DWORD dwErrCode = 0, dwErrCodeKeep = 0;
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// Get the file name
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lpFileName = (LPSTR) GetVDMAddr (getES(),getDI());
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_splitpath( lpFileName, szDrive, szDir, szFname, szExt );
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// Check if handling extended FCB
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if(getAL() != 0){
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bClientAttr = getDL();
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/* Special case for delete volume label (INT 21 Func 13H, Attr = 8H */
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if((bClientAttr == ATTR_VOLUME_ID)) {
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if((uErr = demDeleteLabel(lpFileName[DRIVEBYTE]))) {
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setCF(1);
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setAX(uErr);
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return;
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}
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setAX(0);
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setCF(0);
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return;
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}
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bClientAttr &= (ATTR_READ_ONLY | ATTR_HIDDEN | ATTR_SYSTEM);
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fExtendedFCB = TRUE;
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}
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// Find the first instance of file
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if((hFind = FindFirstFileOem (lpFileName,&wfBuffer)) == (HANDLE)-1){
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demClientError(INVALID_HANDLE_VALUE, *lpFileName);
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return;
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}
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// loop for all files which match the name and attributes
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do {
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// Check if read_only,hidden or system file
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if((dwAttr= wfBuffer.dwFileAttributes & (FILE_ATTRIBUTE_READONLY |
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FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM))){
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// if so, try next file if normal FCB case. If extended fcb case
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// then check if right attributes are given by client.
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if(fExtendedFCB && ((dwAttr & (DWORD)bClientAttr) == dwAttr)){
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// Yes, right attributes are given. So if the file is read
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// only then change the modes to normal. Note NT will
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// delete hidden and system files anyway.
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if (dwAttr & FILE_ATTRIBUTE_READONLY){
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strcpy( szPath_buffer, szDrive);
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strcat( szPath_buffer, szDir);
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strcat( szPath_buffer, wfBuffer.cFileName);
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// if set attributes fail try next file
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if(SetFileAttributesOem (szPath_buffer,
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FILE_ATTRIBUTE_NORMAL) == -1)
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continue;
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}
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}
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else {
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dwErrCodeKeep = ERROR_ACCESS_DENIED;
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continue;
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}
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}
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strcpy( szPath_buffer, szDrive);
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strcat( szPath_buffer, szDir);
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strcat( szPath_buffer, wfBuffer.cFileName);
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if(DeleteFileOem(szPath_buffer) == FALSE) {
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dwErrCode = GetLastError();
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SetLastError(dwErrCode);
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if (((dwErrCode >= ERROR_WRITE_PROTECT) &&
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(dwErrCode <= ERROR_GEN_FAILURE)) ||
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dwErrCode == ERROR_WRONG_DISK ) {
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demClientError(INVALID_HANDLE_VALUE, szPath_buffer[0]);
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return;
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}
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continue;
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}
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// We have deleted at least one file, so report success
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fSuccess = TRUE;
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} while (FindNextFileOem(hFind,&wfBuffer) == TRUE);
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if(FindClose(hFind) == FALSE)
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demPrintMsg (MSG_INVALID_HFIND);
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if (fSuccess == TRUE){
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setCF(0);
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return;
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}
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setCF(1);
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if(dwErrCodeKeep)
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setAX((SHORT) dwErrCodeKeep);
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else
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setAX(ERROR_FILE_NOT_FOUND);
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return;
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}
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/* demRenameFCB - FCB based Rename file
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*
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* Entry - Client (DS:SI) Sources file to be renamed
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* Client (ES:DI) Destination file to be renamed to
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*
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* Exit - SUCCESS
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* Client (CF) = 0
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*
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* FAILURE
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* Client(CF) = 1
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* Client(AX) = error code
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*/
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VOID demRenameFCB (VOID)
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{
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LPSTR lpSrc,lpDst;
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DWORD dw;
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HANDLE hFind;
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PCHAR pNewDstFilePart;
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PCHAR pDstFilePart;
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PCHAR pCurrSrcFilePart;
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WIN32_FIND_DATA W32FindData;
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CHAR NewDst[MAX_PATH];
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CHAR CurrSrc[MAX_PATH];
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lpSrc = (LPSTR) GetVDMAddr (getDS(),getSI());
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lpDst = (LPSTR) GetVDMAddr (getES(),getDI());
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// Find the first instance of the source file
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hFind = FindFirstFileOem (lpSrc,&W32FindData);
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if (hFind == INVALID_HANDLE_VALUE) {
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dw = GetLastError();
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if (dw == ERROR_BAD_PATHNAME || dw == ERROR_DIRECTORY ) {
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SetLastError(ERROR_PATH_NOT_FOUND);
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}
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demClientError(INVALID_HANDLE_VALUE, *lpSrc);
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return;
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}
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//
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// Source string consists of the path taken from the original
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// source specified plus the filename part retrieved from the
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// FindFile call
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//
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strcpy(CurrSrc, lpSrc);
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pCurrSrcFilePart = strrchr(CurrSrc, '\\');
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pCurrSrcFilePart++;
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//
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// Destination string is template for meta character substitution
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//
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pDstFilePart = strrchr(lpDst, '\\');
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pDstFilePart++;
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//
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// NewDst string is constructed from template and the source string
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// when doing meta file character substitution.
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//
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strcpy(NewDst, lpDst);
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pNewDstFilePart = strrchr(NewDst, '\\');
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pNewDstFilePart++;
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do {
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PCHAR pNew;
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PCHAR pSrc;
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PCHAR pDst;
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strcpy(pCurrSrcFilePart,
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W32FindData.cAlternateFileName[0]
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? W32FindData.cAlternateFileName
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: W32FindData.cFileName //// ??? hpfs lfns ????
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);
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pSrc = pCurrSrcFilePart; // source fname
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pNew = pNewDstFilePart; // dest fname to be constructed
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pDst = pDstFilePart; // raw dest fname template (with metas)
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while (*pDst) {
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//
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// If Found a '?' in Dest template, use character from src
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//
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if (*pDst == QMARK) {
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if (*pSrc != DOT && *pSrc)
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*pNew++ = *pSrc++;
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}
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//
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// if Found a DOT in Dest template, Align DOTS between Src\Dst
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//
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else if (*pDst == DOT) {
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while (*pSrc != DOT && *pSrc) { // mov src to one past DOT
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pSrc++;
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}
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if (*pSrc)
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pSrc++;
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*pNew++ = DOT;
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}
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//
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// Nothing special found, use character from Dest template
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//
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else {
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if (*pSrc != DOT && *pSrc)
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pSrc++;
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*pNew++ = *pDst;
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}
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pDst++;
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}
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*pNew = '\0';
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//
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// MoveFile does not return error if dst and src are the same,
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// but DOS does, so check first..
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//
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if (!_stricmp (CurrSrc, NewDst)) {
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setCF(1);
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setAX(0x5);
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FindClose(hFind);
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return;
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}
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if (!MoveFileOem(CurrSrc, NewDst)){
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demClientError(INVALID_HANDLE_VALUE, *lpSrc);
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FindClose(hFind);
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return;
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}
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} while (FindNextFileOem(hFind,&W32FindData));
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//
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// If the search on the source string for any reason besides
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// no more files, then its a genuine error.
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//
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dw = GetLastError();
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if (dw != ERROR_NO_MORE_FILES) {
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if (dw == ERROR_BAD_PATHNAME || dw == ERROR_DIRECTORY ) {
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SetLastError(ERROR_PATH_NOT_FOUND);
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}
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demClientError(INVALID_HANDLE_VALUE, *lpSrc);
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}
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else {
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setCF(0);
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}
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FindClose(hFind);
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return;
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}
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/* demCloseFCB - Close the NT handle associated with the FCB being closed.
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*
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* Entry - Client (AX:SI) DWORD NT handle
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*
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* Exit - SUCCESS
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* Client (CF) = 0
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*
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* FAILURE
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* Client(CF) = 1
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* Client(AX) = error code
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*/
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VOID demCloseFCB (VOID)
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{
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HANDLE hFile;
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hFile = GETHANDLE (getAX(),getSI());
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if(hFile == 0) {
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setCF(0);
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return;
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}
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if (CloseHandle (hFile) == FALSE){
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demClientError(hFile, (CHAR)-1);
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return;
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}
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setCF(0);
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return;
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}
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/* demCreateFCB - An FCB is being created get the NT handle.
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*
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* Entry - Client (AL) Creation Mode
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* 00 - Normal File
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* 01 - Read-only file
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* 02 - Hidden File
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* 04 - System file
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* Client (DS:SI) Full path filename
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* Client (ES:DI) SFT address
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*
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* Exit - SUCCESS
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* Client (CF) = 0
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* Client (AX:BP) = NT Handle
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* Client (BX) = Time
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* Client (CX) = Date
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* Client (DX:SI) = Size
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*
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* FAILURE
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* Client(CF) = 1
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* Client(AX) = error code
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*/
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VOID demCreateFCB (VOID)
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{
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demFCBCommon (CREATE_ALWAYS);
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return;
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}
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/* demDate16 - Get the current date/time in DOS FCB format.
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*
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* Entry - None
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*
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* Exit - Always Success
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* Client (AX) has date
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* Client (DX) has time
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* NOTES:
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*
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* DemDate16 returns the current date in AX, current time in DX in this format
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* AX - YYYYYYYMMMMDDDDD years months days
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* DX - HHHHHMMMMMMSSSSS hours minutes seconds/2
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*/
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VOID demDate16 (VOID)
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{
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SYSTEMTIME TimeDate;
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GetLocalTime(&TimeDate);
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// date is stored in a packed word: ((year-1980)*512) + (month*32) + day
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setAX ( (USHORT) (((TimeDate.wYear-1980) << 9 ) |
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((TimeDate.wMonth & 0xf) << 5 ) |
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(TimeDate.wDay & 0x1f))
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);
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setDX ( (USHORT) ((TimeDate.wHour << 11) |
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((TimeDate.wMinute & 0x3f) << 5) |
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((TimeDate.wSecond / 2) & 0x1f))
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);
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return;
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}
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/* demFCBIO - Carry out the FCB based IO operation.
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*
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* Entry - Client (BX) = 1 if read operation, 0 if write
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* Client (AX:BP) NT Handle
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* Client (DI:DX) offset to start the operation with
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* Client (CX) Count of bytes
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*
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* Exit - SUCCESS
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* Client (CF) = 0
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* Client (CX) = counts of bytes read/written
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* Client (AX:BX) = size
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*
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* FAILURE
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* Client(CF) = 1
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* Client(AX) = error code
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*/
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VOID demFCBIO (VOID)
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{
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HANDLE hFile;
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ULONG CurOffset;
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PVOID pBuf;
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DWORD dwBytesIO;
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DWORD dwSize,dwSizeHigh;
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DWORD dwErrCode;
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hFile = GETHANDLE (getAX(),getBP());
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CurOffset = (((ULONG)getDI()) << 16) + (ULONG)getDX();
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if (SetFilePointer (hFile,
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(LONG)CurOffset,
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NULL,
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(DWORD)FILE_BEGIN) == -1L){
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demClientError(hFile, (CHAR)-1);
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return ;
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}
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pBuf = (PVOID)GetVDMAddr(*((PUSHORT)pulDTALocation + 1),
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*((PUSHORT)pulDTALocation));
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if(getBX()) { // Read Operation
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if (ReadFile (hFile,
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pBuf,
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(DWORD)getCX(),
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&dwBytesIO,
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NULL) == FALSE){
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Sim32FlushVDMPointer(*pulDTALocation, getCX(), pBuf, FALSE);
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Sim32FreeVDMPointer(*pulDTALocation, getCX(), pBuf, FALSE);
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demClientError(hFile, (CHAR)-1);
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return ;
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}
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Sim32FlushVDMPointer (*pulDTALocation, getCX(),pBuf, FALSE);
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Sim32FreeVDMPointer (*pulDTALocation, getCX(), pBuf, FALSE);
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}
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else {
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if (WriteFile (hFile,
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pBuf,
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(DWORD)getCX(),
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&dwBytesIO,
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NULL) == FALSE) {
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|
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// If disk is full then we should return number of bytes written
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// AX = 1 and CF = 1
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dwErrCode = GetLastError();
|
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if(dwErrCode == ERROR_DISK_FULL) {
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|
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setCX( (USHORT) dwBytesIO);
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setAX(1);
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setCF(1);
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return;
|
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}
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|
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SetLastError(dwErrCode);
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|
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demClientError(hFile, (CHAR)-1);
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return ;
|
|
|
|
}
|
|
}
|
|
|
|
// Get File Size
|
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if((dwSize = GetFileSize(hFile,&dwSizeHigh)) == -1){
|
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|
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demPrintMsg(MSG_FILEINFO);
|
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ASSERT(FALSE);
|
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demClientError(hFile, (CHAR)-1);
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return;
|
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}
|
|
|
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if(dwSizeHigh) {
|
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demPrintMsg(MSG_FILESIZE_TOOBIG);
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ASSERT(FALSE);
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demClientError(hFile, (CHAR)-1);
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return;
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}
|
|
|
|
// Setup the exit registers
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setCX((USHORT)dwBytesIO);
|
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setBX((USHORT)dwSize);
|
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setAX((USHORT)(dwSize >> 16 ));
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setCF(0);
|
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return;
|
|
}
|
|
|
|
/* demGetFileInfo - Get Misc. file info in FCB format.
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|
*
|
|
* Entry - Client (DS:SI) full path file name
|
|
*
|
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* Exit - SUCCESS
|
|
* Client (CF) = 0
|
|
* Client (AX) = Attribute of file
|
|
* Client (CX) = Time stamp of file
|
|
* Client (DX = Date stamp of file
|
|
* Client (BX:DI)= Size of file (32 bit)
|
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*
|
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* FAILURE
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* Client(CF) = 1
|
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* Client(AX) = error code
|
|
*/
|
|
|
|
VOID demGetFileInfo (VOID)
|
|
{
|
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HANDLE hFile;
|
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LPSTR lpFileName;
|
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WORD wDate,wTime;
|
|
DWORD dwSize,dwAttr;
|
|
|
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lpFileName = (LPSTR) GetVDMAddr (getDS(),getSI());
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|
|
|
if ((hFile = CreateFileOem(lpFileName,
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GENERIC_READ,
|
|
FILE_SHARE_READ,
|
|
NULL,
|
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OPEN_EXISTING,
|
|
0,
|
|
NULL)) == (HANDLE)-1){
|
|
demClientError(INVALID_HANDLE_VALUE, *lpFileName);
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return;
|
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}
|
|
|
|
// Get Misc. INfo
|
|
if (demGetMiscInfo (hFile,&wTime, &wDate, &dwSize) == FALSE) {
|
|
CloseHandle (hFile);
|
|
return;
|
|
}
|
|
|
|
CloseHandle (hFile);
|
|
|
|
if ((dwAttr = GetFileAttributesOem (lpFileName)) == -1) {
|
|
demClientError(INVALID_HANDLE_VALUE, *lpFileName);
|
|
return;
|
|
}
|
|
|
|
if (dwAttr == FILE_ATTRIBUTE_NORMAL)
|
|
dwAttr = 0;
|
|
|
|
setAX((USHORT)dwAttr);
|
|
setCX(wTime);
|
|
setDX(wDate);
|
|
setDI((USHORT)dwSize);
|
|
setBX((USHORT)(dwSize >> 16));
|
|
return;
|
|
}
|
|
|
|
|
|
/* demOpenFCB - An FCB is being opened get the NT handle.
|
|
*
|
|
* Entry - Client (AL) Open Mode
|
|
* Client (DS:SI) Full path filename
|
|
*
|
|
* Exit - SUCCESS
|
|
* Client (CF) = 0
|
|
* Client (AX:BP) = NT Handle
|
|
* Client (BX) = Time
|
|
* Client (CX) = Date
|
|
* Client (DX:SI) = Size
|
|
*
|
|
* FAILURE
|
|
* Client(CF) = 1
|
|
* Client(AX) = error code
|
|
*/
|
|
|
|
VOID demOpenFCB (VOID)
|
|
{
|
|
demFCBCommon (OPEN_EXISTING);
|
|
return;
|
|
}
|
|
|
|
/* demFCBCommon - FCB Open/Create.
|
|
*
|
|
* Entry - CreateDirective - Open/Create
|
|
* Client (AL) Open Mode
|
|
* Client (DS:SI) Full path filename
|
|
*
|
|
* Exit - SUCCESS
|
|
* Client (CF) = 0
|
|
* Client (AX:BP) = NT Handle
|
|
* Client (BX) = Time
|
|
* Client (CX) = Date
|
|
* Client (DX:SI) = Size
|
|
*
|
|
* FAILURE
|
|
* Client(CF) = 1
|
|
* Client(AX) = error code
|
|
*/
|
|
VOID demFCBCommon (ULONG CreateDirective)
|
|
{
|
|
HANDLE hFile;
|
|
LPSTR lpFileName;
|
|
UCHAR uchMode,uchAccess;
|
|
DWORD dwDesiredAccess = GENERIC_WRITE | GENERIC_READ;
|
|
DWORD dwShareMode = FILE_SHARE_READ | FILE_SHARE_WRITE;
|
|
WORD wDate,wTime;
|
|
DWORD dwSize,dwAttr=0;
|
|
USHORT uErr;
|
|
SECURITY_ATTRIBUTES sa;
|
|
|
|
lpFileName = (LPSTR) GetVDMAddr (getDS(),getSI());
|
|
uchMode = getAL();
|
|
|
|
/* Special case for delete volume label (INT 21 Func 13H, Attr = 8H */
|
|
|
|
if((uchMode == ATTR_VOLUME_ID) && (CreateDirective == CREATE_ALWAYS)) {
|
|
if((uErr = demCreateLabel(lpFileName[DRIVEBYTE],
|
|
lpFileName+LABELOFF))) {
|
|
setCF(1);
|
|
setAX(uErr);
|
|
return;
|
|
}
|
|
setAX(0);
|
|
setBP(0);
|
|
setCF(0);
|
|
return;
|
|
}
|
|
|
|
|
|
// In create case AL has creation attributes. By default
|
|
// Access is for read/write and sharing for both. In open
|
|
// case AL has appropriate access and sharing information.
|
|
if((CreateDirective == CREATE_ALWAYS) && ((uchMode &0xff) == 0)) {
|
|
|
|
dwAttr = FILE_ATTRIBUTE_NORMAL;
|
|
dwShareMode = FILE_SHARE_WRITE | FILE_SHARE_READ;
|
|
}
|
|
else {
|
|
uchAccess = uchMode & (UCHAR)ACCESS_MASK;
|
|
|
|
if (uchAccess == OPEN_FOR_READ)
|
|
dwDesiredAccess = GENERIC_READ;
|
|
|
|
else if (uchAccess == OPEN_FOR_WRITE)
|
|
dwDesiredAccess = GENERIC_WRITE;
|
|
|
|
uchMode = uchMode & (UCHAR)SHARING_MASK;
|
|
|
|
switch (uchMode) {
|
|
case SHARING_DENY_BOTH:
|
|
dwShareMode = 0;
|
|
break;
|
|
case SHARING_DENY_WRITE:
|
|
dwShareMode = FILE_SHARE_READ;
|
|
break;
|
|
case SHARING_DENY_READ:
|
|
dwShareMode = FILE_SHARE_WRITE;
|
|
break;
|
|
}
|
|
}
|
|
sa.nLength = sizeof (SECURITY_ATTRIBUTES);
|
|
sa.lpSecurityDescriptor = NULL;
|
|
sa.bInheritHandle = TRUE;
|
|
|
|
if ((hFile = CreateFileOem(lpFileName,
|
|
dwDesiredAccess,
|
|
dwShareMode | FILE_SHARE_DELETE,
|
|
&sa,
|
|
CreateDirective,
|
|
dwAttr,
|
|
NULL)) == (HANDLE)-1){
|
|
demClientError(INVALID_HANDLE_VALUE, *lpFileName);
|
|
return;
|
|
}
|
|
|
|
// Get Misc. INfo
|
|
if (demGetMiscInfo (hFile,&wTime, &wDate, &dwSize) == FALSE)
|
|
return;
|
|
|
|
// Setup the exit registers
|
|
setBX(wTime);
|
|
setCX(wDate);
|
|
setBP((USHORT)hFile);
|
|
setAX((USHORT)((ULONG)hFile >> 16));
|
|
setSI((USHORT)dwSize);
|
|
setDX((USHORT)(dwSize >> 16));
|
|
setCF(0);
|
|
return;
|
|
}
|
|
|
|
|
|
BOOL demGetMiscInfo (hFile, lpTime, lpDate, lpSize)
|
|
HANDLE hFile;
|
|
LPWORD lpTime;
|
|
LPWORD lpDate;
|
|
LPDWORD lpSize;
|
|
{
|
|
FILETIME LastWriteTime,ftLocal;
|
|
DWORD dwSizeHigh=0;
|
|
|
|
if(GetFileTime (hFile,NULL,NULL,&LastWriteTime) == -1){
|
|
demPrintMsg(MSG_FILEINFO);
|
|
ASSERT(FALSE);
|
|
demClientError(hFile, (CHAR)-1);
|
|
CloseHandle (hFile);
|
|
return FALSE;
|
|
}
|
|
|
|
FileTimeToLocalFileTime (&LastWriteTime,&ftLocal);
|
|
|
|
if(FileTimeToDosDateTime(&ftLocal,
|
|
lpDate,
|
|
lpTime) == FALSE){
|
|
demPrintMsg(MSG_FILEINFO);
|
|
ASSERT(FALSE);
|
|
demClientError(hFile, (CHAR)-1);
|
|
return FALSE;
|
|
}
|
|
|
|
if((*lpSize = GetFileSize(hFile,&dwSizeHigh)) == -1){
|
|
demPrintMsg(MSG_FILEINFO);
|
|
ASSERT(FALSE);
|
|
demClientError(hFile, (CHAR)-1);
|
|
return FALSE;
|
|
}
|
|
|
|
if(dwSizeHigh) {
|
|
demPrintMsg(MSG_FILESIZE_TOOBIG);
|
|
ASSERT(FALSE);
|
|
demClientError(hFile, (CHAR)-1);
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|