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/****************************************************************************
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Win32 File compatibility for DOS.
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[This version does support LFNs, if available.]
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Written by: Kenneth J. Davis
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Date: August, 2000
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Contact: jeremyd@computer.org
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Copyright (c): Public Domain [United States Definition]
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR AUTHORS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
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OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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****************************************************************************/
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/*** Expects Pointers to be near (Tiny, Small, and Medium models ONLY) ***/
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#include "dosdisk.h"
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#include <stdlib.h>
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#include <string.h>
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#define searchAttr ( FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_HIDDEN | \
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FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_ARCHIVE )
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/* If this variable is nonzero then will 1st attempt LFN findfirst
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* (findfirst calls sets flag, so findnext/findclose know proper method to continue)
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* else if 0 then only attempt old 0x4E findfirst.
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* This is mostly a debugging tool, may be useful during runtime.
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* Default is LFN_ENABLE.
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*/
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int LFN_Enable_Flag = LFN_ENABLE;
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/* copy old style findfirst data FFDTA to a WIN32_FIND_DATA
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* NOTE: does not map exactly.
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* internal to this module only.
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*/
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static void copyFileData(WIN32_FIND_DATAA *findData, FFDTA *finfo)
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{
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/* Copy requried contents over into required structure */
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strcpy(findData->cFileName, finfo->ff_name);
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findData->dwFileAttributes = (DWORD)finfo->ff_attrib;
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/* copy over rest (not quite properly) */
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findData->ftCreationTime.ldw[0] = finfo->ff_ftime;
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findData->ftLastAccessTime.ldw[0] = finfo->ff_ftime;
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findData->ftLastWriteTime.ldw[0] = finfo->ff_ftime;
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findData->ftCreationTime.ldw[1] = finfo->ff_fdate;
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findData->ftLastAccessTime.ldw[1] = finfo->ff_fdate;
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findData->ftLastWriteTime.ldw[1] = finfo->ff_fdate;
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findData->ftCreationTime.hdw = 0;
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findData->ftLastAccessTime.hdw = 0;
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findData->ftLastWriteTime.hdw = 0;
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findData->nFileSizeHigh = 0;
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findData->nFileSizeLow = (DWORD)finfo->ff_fsize;
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findData->dwReserved0 = 0;
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findData->dwReserved1 = 0;
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}
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HANDLE FindFirstFileA(const char *pathname, WIN32_FIND_DATAA *findData)
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{
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char path[1024];
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HANDLE hnd;
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short cflag = 0; /* used to indicate if findfirst is succesful or not */
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/* verify findData is valid */
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if (findData == NULL)
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return INVALID_HANDLE_VALUE;
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/* allocate memory for the handle */
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if ((hnd = (HANDLE)malloc(sizeof(struct FindFileStruct))) == NULL)
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return INVALID_HANDLE_VALUE;
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/* initialize structure (clear) */
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/* hnd->handle = 0; hnd->ffdtaptr = NULL; */
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memset(hnd, 0, sizeof(struct FindFileStruct));
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/* Clear findData, this is to fix a glitch under NT, with 'special' $???? files */
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memset(findData, 0, sizeof(struct WIN32_FIND_DATA));
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/* First try DOS LFN (0x714E) findfirst, going to old (0x4E) if error */
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if (LFN_Enable_Flag)
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{
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hnd->flag = FINDFILELFN;
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asm {
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STC //; In case not supported
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PUSH SI //; Ensure borlands registers unmodified
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PUSH DI
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MOV SI, 1 //; same format as when old style used, set to 0 for 64bit value
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MOV AX, DS //; Set address of findData into ES:DI
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MOV ES, AX
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MOV DI, [findData]
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MOV AX, 714Eh //; LFN version of FindFirst
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MOV DX, [pathname] //; Load DS:DX with pointer to path for Findfirt
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}
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_CX = searchAttr;
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asm {
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INT 21h //; Execute interrupt
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POP DI //; Restore DI
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POP SI //; Restore SI
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JC lfnerror
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}
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hnd->fhnd.handle = _AX; /* store handle finally :) */
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return hnd;
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lfnerror:
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/* AX is supposed to contain 7100h if function not supported, else real error */
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/* However, FreeDOS returns AX = 1 = Invalid function number instead. */
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if ((_AX != 0x7100) && (_AX != 0x0001))
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{
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free(hnd);
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return INVALID_HANDLE_VALUE;
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}
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}
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/* Use DOS (0x4E) findfirst, returning if error */
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hnd->flag = FINDFILEOLD;
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/* allocate memory for the FFDTA */
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if ((hnd->fhnd.ffdtaptr = (FFDTA *)malloc(sizeof(struct FFDTA))) == NULL)
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{
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free(hnd);
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return INVALID_HANDLE_VALUE;
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}
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/* if pathname ends in \* convert to \*.* */
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strcpy(path, pathname);
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{
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int eos = strlen(path) - 1;
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if ((path[eos] == '*') && (path[eos - 1] == '\\')) strcat(path, ".*");
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}
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asm {
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MOV AH, 2Fh //; Get Current DTA
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INT 21h //; Execute interrupt, returned in ES:BX
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PUSH BX //; Store its Offset, then Segment
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PUSH ES
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MOV AH, 1Ah //; Set Current DTA to our buffer, DS:DX
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}
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_DX = (WORD)(*hnd).fhnd.ffdtaptr; //; Load our buffer for new DTA.
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asm {
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INT 21h //; Execute interrupt
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MOV AX, 4E00h //; Actual findfirst call
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LEA DX, path //; Load DS:DX with pointer to path for Findfirt
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}
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_CX = searchAttr;
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asm {
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INT 21h //; Execute interrupt
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JNC success //; If carry is not set then succesful
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MOV [cflag], AX //; Set flag with error.
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}
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success:
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asm {
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MOV AH, 1Ah //; Set Current DTA back to original, DS:DX
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MOV DX, DS //; Store DS, must be preserved
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POP DS //; Popping ES into DS since thats where we need it.
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POP BX //; Now DS:BX points to original DTA
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INT 21h //; Execute interrupt to restore.
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MOV DS, DX //; Restore DS
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}
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if (cflag)
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{
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free(hnd->fhnd.ffdtaptr);
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free(hnd);
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return INVALID_HANDLE_VALUE;
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}
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/* copy its results over */
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copyFileData(findData, hnd->fhnd.ffdtaptr);
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return hnd;
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}
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int FindNextFileA(HANDLE hnd, WIN32_FIND_DATAA *findData)
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{
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short cflag = 0; /* used to indicate if dos findnext succesful or not */
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/* if bad handle given return */
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if ((hnd == NULL) || (hnd == INVALID_HANDLE_VALUE)) return 0;
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/* verify findData is valid */
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if (findData == NULL) return 0;
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/* Clear findData, this is to fix a glitch under NT, with 'special' $???? files */
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memset(findData, 0, sizeof(struct WIN32_FIND_DATA));
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/* Flag indicate if using LFN DOS (0x714F) or not */
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if (hnd->flag == FINDFILELFN)
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{
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_BX = hnd->fhnd.handle; //; Move the Handle returned by previous findfirst into BX
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asm {
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STC //; In case not supported
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PUSH SI //; Ensure borlands registers unmodified
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PUSH DI
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MOV SI, 1 //; same format as when old style used, set to 0 for 64bit value
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MOV AX, DS //; Set address of findData into ES:DI
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MOV ES, AX
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MOV DI, [findData]
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MOV AX, 714Fh //; LFN version of FindNext
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INT 21h //; Execute interrupt
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POP DI //; Restore DI
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POP SI //; Restore SI
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JC lfnerror
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}
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return 1; /* success */
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lfnerror:
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return 0; /* Any errors here, no other option but to return error/no more files */
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}
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else /* Use DOS (0x4F) findnext, returning if error */
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{
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asm {
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MOV AH, 2Fh //; Get Current DTA
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INT 21h //; Execute interrupt, returned in ES:BX
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PUSH BX //; Store its Offset, then Segment
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PUSH ES
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}
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_DX = (WORD)(*hnd).fhnd.ffdtaptr; //; Load our buffer for new DTA.
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asm {
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MOV AX, 1A00h //; Set Current DTA to our buffer, DS:DX
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INT 21h //; Execute interrupt
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MOV AX, 4F00h //; Actual findnext call
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INT 21h //; Execute interrupt
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JNC success //; If carry is not set then succesful
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MOV [cflag], AX //; Set flag with error.
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}
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success:
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asm {
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MOV AH, 1Ah //; Set Current DTA back to original, DS:DX
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MOV DX, DS //; Store DS, must be preserved
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POP DS //; Popping ES into DS since thats where we need it.
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POP BX //; Now DS:BX points to original DTA
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INT 21h //; Execute interrupt to restore.
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MOV DS, DX //; Restore DS
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}
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if (cflag)
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return 0;
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/* copy its results over */
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copyFileData(findData, hnd->fhnd.ffdtaptr);
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return 1;
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}
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}
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/* free resources to prevent memory leaks */
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void FindClose(HANDLE hnd)
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{
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/* 1st check if valid handle given */
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if ((hnd != NULL) && (hnd != INVALID_HANDLE_VALUE))
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{
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/* See if its for the new or old style findfirst */
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if (hnd->flag == FINDFILEOLD) /* Just free memory allocated */
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{
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if (hnd->fhnd.ffdtaptr != NULL)
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mateusz.vi |
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free(hnd->fhnd.ffdtaptr);
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hnd->fhnd.ffdtaptr = NULL;
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}
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else /* must call LFN findclose */
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{
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_BX = hnd->fhnd.handle; /* Move handle returned from findfirst into BX */
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asm {
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STC
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MOV AX, 71A1h
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INT 21h /* carry set on error */
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}
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hnd->fhnd.handle = 0;
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}
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free(hnd); /* Free memory used for the handle itself */
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}
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}
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#include <stdio.h>
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/**
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Try LFN getVolumeInformation 1st
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if successful, assume valid drive/share (ie will return 1 unless error getting label)
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if failed (any error other than unsupported) return 0
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if a drive (ie a hard drive, ram drive, network mapped to letter) [has : as second letter]
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{
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try findfirst for volume label. (The LFN api does not seem to support LABEL attribute searches.)
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If getVolInfo unsupported but get findfirst succeed, assume valid (ie return 1)
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Try Get Serial#
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}
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else a network give \\server\share and LFN getVol unsupported, assume failed 0, as the
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original findfirst/next I haven't seen support UNC naming, clear serial and volume.
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*** Currently trying to find a way to get a \\server\share 's serial & volume if LFN available ***
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*/
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/* Only the 1st 4 arguments are used, returns zero on failure,
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* If lpRootPathName is NULL or "" we use current default drive.
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*/
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#pragma argsused
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int GetVolumeInformation(char *lpRootPathName,char *lpVolumeNameBuffer,
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DWORD nVolumeNameSize, DWORD *lpVolumeSerialNumber,
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DWORD *lpMaximumComponentLength, DWORD *lpFileSystemFlags,
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char *lpFileSystemNameBuffer, DWORD nFileSystemNameSize)
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{
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/* File info for getting Volume Label (using directory entry) */
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FFDTA finfo;
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/* Using DOS interrupt to get serial number */
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struct media_info
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{
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short dummy;
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DWORD serial;
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char volume[11];
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short ftype[8];
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} media;
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/* buffer to store file system name in lfn get volume information */
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2026 |
mateusz.vi |
334 |
char fsystem[32];
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2019 |
mateusz.vi |
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/* Stores the root path we use. */
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char pathname[260];
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338 |
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2026 |
mateusz.vi |
339 |
/* Used to determine if drive valid (success/failure of this function)
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2019 |
mateusz.vi |
340 |
* 0 = success
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* 1 = failure
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* 2 = LFN api unsupported (tentative failure)
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*/
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344 |
int cflag=2;
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345 |
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346 |
/* validate root path to obtain info on, NULL or "" means use current */
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|
347 |
if ((lpRootPathName == NULL) || (*lpRootPathName == '\0'))
|
|
|
348 |
{
|
|
|
349 |
/* Assume if NULL user wants current drive, eg C:\ */
|
|
|
350 |
asm {
|
|
|
351 |
MOV AH, 19h //; Get Current Default Drive
|
|
|
352 |
INT 21h //; returned in AL, 0=A, 1=B,...
|
|
|
353 |
LEA BX, pathname //; load pointer to our buffer
|
|
|
354 |
ADD AL, 'A' //; Convert #returned to a letter
|
|
|
355 |
MOV [BX], AL //; Store drive letter
|
|
|
356 |
INC BX //; point to next character
|
|
|
357 |
MOV BYTE PTR [BX], ':' //; Store the colon
|
|
|
358 |
INC BX
|
|
|
359 |
MOV BYTE PTR [BX], '\' //; and the \ (this gets converted correctly as a single \
|
|
|
360 |
INC BX
|
|
|
361 |
MOV BYTE PTR [BX], 0 //; Most importantly the '\0' terminator
|
|
|
362 |
}
|
|
|
363 |
}
|
|
|
364 |
else
|
|
|
365 |
strcpy(pathname, lpRootPathName);
|
|
|
366 |
|
|
|
367 |
/* Flag indicate if using LFN DOS or not */
|
|
|
368 |
if (LFN_Enable_Flag)
|
|
|
369 |
{
|
|
|
370 |
asm {
|
|
|
371 |
MOV AX, 71A0h //; LFN GetVolumeInformation
|
|
|
372 |
PUSH DI //; Preserve DI for borland
|
|
|
373 |
MOV DX, DS //; Load buffer for file system name into ES:DI
|
|
|
374 |
MOV ES, DX
|
|
|
375 |
LEA DI, fsystem
|
|
|
376 |
MOV CX, 32 //; size of ES:DI buffer
|
|
|
377 |
LEA DX, pathname //; Load root name into DS:DX
|
|
|
378 |
STC //; in case LFN api unsupported
|
|
|
379 |
INT 21h
|
|
|
380 |
POP DI //; restore Borland's register
|
|
|
381 |
JC getvolerror //; on any error skip storing any info
|
|
|
382 |
}
|
|
|
383 |
/* store stuff
|
|
|
384 |
BX = file system flags (see #01783)
|
|
|
385 |
CX = maximum length of file name [usually 255]
|
|
|
386 |
DX = maximum length of path [usually 260]
|
|
|
387 |
fsystem buffer filled (ASCIZ, e.g. "FAT","NTFS","CDFS")
|
|
|
388 |
*/
|
|
|
389 |
cflag = 0; //; indicate no error
|
|
|
390 |
goto endgetvol;
|
|
|
391 |
|
|
|
392 |
getvolerror:
|
|
|
393 |
asm {
|
|
|
394 |
CMP AX, 7100h //; see if real error or unsupported
|
|
|
395 |
JE endgetvol //; if so skip ahead
|
|
|
396 |
CMP AX, 0001h //; FreeDOS returns AX = 1 = Invalid function number
|
|
|
397 |
JE endgetvol
|
|
|
398 |
}
|
|
|
399 |
cflag = 1; //; indicate failure
|
|
|
400 |
|
|
|
401 |
endgetvol:
|
|
|
402 |
}
|
|
|
403 |
|
|
|
404 |
|
|
|
405 |
if (cflag != 1) /* if no error validating volume info or LFN getVolInfo unsupported */
|
|
|
406 |
{
|
|
|
407 |
/* if a drive, test if valid, get volume, and possibly serial # */
|
|
|
408 |
if (pathname[1] == ':')
|
|
|
409 |
{
|
|
|
410 |
/* assume these calls will succeed, change on an error */
|
|
|
411 |
cflag = 0;
|
|
|
412 |
|
|
|
413 |
/* get path ending in \*.*, */
|
|
|
414 |
if (pathname[strlen(pathname)-1] != '\\')
|
|
|
415 |
strcat(pathname, "\\*.*");
|
|
|
416 |
else
|
|
|
417 |
strcat(pathname, "*.*");
|
|
|
418 |
|
|
|
419 |
/* Search for volume using old findfirst, as LFN version (NT5 DOS box) does
|
|
|
420 |
* not recognize FILE_ATTRIBUTE_LABEL = 0x0008 as label attribute.
|
|
|
421 |
*/
|
|
|
422 |
asm {
|
|
|
423 |
MOV AH, 2Fh //; Get Current DTA
|
|
|
424 |
INT 21h //; Execute interrupt, returned in ES:BX
|
|
|
425 |
PUSH BX //; Store its Offset, then Segment
|
|
|
426 |
PUSH ES
|
|
|
427 |
MOV AH, 1Ah //; Set Current DTA to our buffer, DS:DX
|
|
|
428 |
LEA DX, finfo //; Load our buffer for new DTA.
|
|
|
429 |
INT 21h //; Execute interrupt
|
|
|
430 |
MOV AX, 4E00h //; Actual findfirst call
|
|
|
431 |
LEA DX, pathname //; Load DS:DX with pointer to modified RootPath for Findfirt
|
|
|
432 |
MOV CX, FILE_ATTRIBUTE_LABEL
|
|
|
433 |
INT 21h //; Execute interrupt, Carry set on error, unset on success
|
|
|
434 |
JNC success //; If carry is not set then succesful
|
|
|
435 |
MOV [cflag], AX //; Set flag with error.
|
|
|
436 |
JMP cleanup //; Restore DTA
|
|
|
437 |
}
|
|
|
438 |
success: //; True volume entry only has volume attribute set [MS' LFNspec]
|
|
|
439 |
asm { //; But they may also have archive bit set!!!
|
|
|
440 |
LEA BX, finfo.ff_attrib //; Load address of file's attributes returned by findfirst/next
|
|
|
441 |
MOV AL, BYTE PTR [BX] //; Looking for a BYTE that is FILE_ATTRIBUTE_LABEL only
|
|
|
442 |
AND AL, 0xDF //; Ignore Archive bit
|
|
|
443 |
CMP AL, FILE_ATTRIBUTE_LABEL
|
|
|
444 |
JE cleanup //; They match, so should be true volume entry.
|
|
|
445 |
MOV AX, 4F00h //; Otherwise keep looking (findnext)
|
|
|
446 |
INT 21h //; Execute interrupt
|
|
|
447 |
JNC success //; If carry is not set then succesful
|
|
|
448 |
MOV [cflag], AX //; Set flag with error.
|
|
|
449 |
}
|
|
|
450 |
cleanup:
|
|
|
451 |
asm {
|
|
|
452 |
MOV AH, 1Ah //; Set Current DTA back to original, DS:DX
|
|
|
453 |
MOV DX, DS //; Store DS, must be preserved
|
|
|
454 |
POP DS //; Popping ES into DS since thats where we need it.
|
|
|
455 |
POP BX //; Now DS:BX points to original DTA
|
|
|
456 |
INT 21h //; Execute interrupt to restore.
|
|
|
457 |
MOV DS, DX //; Restore DS
|
|
|
458 |
}
|
|
|
459 |
/* copy over volume label, if buffer given */
|
|
|
460 |
if (lpVolumeNameBuffer != NULL)
|
|
|
461 |
{
|
|
|
462 |
if (cflag != 0) /* error or no label */
|
|
|
463 |
lpVolumeNameBuffer[0] = '\0';
|
|
|
464 |
else /* copy up to buffer's size of label */
|
|
|
465 |
{
|
|
|
466 |
strncpy(lpVolumeNameBuffer, finfo.ff_name, nVolumeNameSize);
|
|
|
467 |
lpVolumeNameBuffer[nVolumeNameSize-1] = '\0';
|
|
|
468 |
/* slide characters over if longer than 8 to remove . */
|
|
|
469 |
if (lpVolumeNameBuffer[8] == '.')
|
|
|
470 |
{
|
|
|
471 |
lpVolumeNameBuffer[8] = lpVolumeNameBuffer[9];
|
|
|
472 |
lpVolumeNameBuffer[9] = lpVolumeNameBuffer[10];
|
|
|
473 |
lpVolumeNameBuffer[10] = lpVolumeNameBuffer[11];
|
|
|
474 |
lpVolumeNameBuffer[11] = '\0';
|
|
|
475 |
}
|
|
|
476 |
}
|
|
|
477 |
}
|
|
|
478 |
/* Test for no label found, which is not an error,
|
|
|
479 |
Note: added the check for 0x02 as FreeDOS returns this instead
|
|
|
480 |
at least for disks with LFN entries and no volume label.
|
|
|
481 |
*/
|
|
|
482 |
if ((cflag == 0x12) || /* No more files or */
|
|
|
483 |
(cflag == 0x02)) /* File not found */
|
|
|
484 |
cflag = 0; /* so assume valid drive */
|
|
|
485 |
|
|
|
486 |
|
2026 |
mateusz.vi |
487 |
/* Get Serial Number, only supports drives mapped to letters */
|
2019 |
mateusz.vi |
488 |
media.serial = 0; /* set to 0, stays 0 on an error */
|
|
|
489 |
|
|
|
490 |
_BX = (pathname[0] & '\xDF') - 'A' + 1; /* Clear BH, drive in BL */
|
|
|
491 |
asm {
|
|
|
492 |
LEA DX, media //; DS:DX pointer to media structure
|
|
|
493 |
MOV CX, 0866h //; CH=disk drive, CL=Get Serial #
|
|
|
494 |
MOV AX, 440Dh //; Generic IOCTL
|
|
|
495 |
INT 21h
|
|
|
496 |
}
|
|
|
497 |
|
|
|
498 |
/***************** Replaced with 'documented' version of Get Serial Number *********************/
|
2026 |
mateusz.vi |
499 |
/* NT2000pro does NOT set or clear the carry for int21h subfunction 6900h
|
2019 |
mateusz.vi |
500 |
* if an error occurs, it leaves media unchanged.
|
|
|
501 |
*/
|
|
|
502 |
// asm {
|
|
|
503 |
// MOV AX, 0x6900
|
|
|
504 |
// INT 21h //; Should set carry on error, clear on success [note NT5 does not]
|
|
|
505 |
// }
|
|
|
506 |
/***************** End with 'undocumented' version of Get Serial Number *********************/
|
|
|
507 |
|
|
|
508 |
if (lpVolumeSerialNumber != NULL)
|
|
|
509 |
*lpVolumeSerialNumber = media.serial;
|
|
|
510 |
}
|
|
|
511 |
else /* a network drive, assume results of LFN getVolInfo, no volume or serial [for now] */
|
|
|
512 |
{
|
|
|
513 |
if (lpVolumeNameBuffer != NULL)
|
|
|
514 |
lpVolumeNameBuffer[0] = '\0';
|
|
|
515 |
|
|
|
516 |
if (lpVolumeSerialNumber != NULL)
|
|
|
517 |
*lpVolumeSerialNumber = 0x0;
|
|
|
518 |
}
|
|
|
519 |
}
|
2026 |
mateusz.vi |
520 |
|
2019 |
mateusz.vi |
521 |
/* If there was an error getting the validating drive return failure) */
|
|
|
522 |
if (cflag) /* cflag is nonzero on any errors */
|
|
|
523 |
return 0; /* zero means error! */
|
|
|
524 |
else
|
|
|
525 |
return 1; /* Success (drive exists we think anyway) */
|
|
|
526 |
}
|
|
|
527 |
|