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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 <dos.h>
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#include <stdlib.h>
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#include <string.h>
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#include "dosdisk.h"
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#define searchAttr ( FILE_A_DIR | FILE_A_HIDDEN | FILE_A_SYSTEM | FILE_A_READONLY | FILE_A_ARCH )
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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(struct WIN32_FIND_DATA *findData, const struct 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->attrib = finfo->ff_attr;
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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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struct FFDTA *FindFirstFile(const char *pathname, struct WIN32_FIND_DATA *findData)
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{
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static char path[1024];
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struct FFDTA *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) return(NULL);
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/* allocate memory for the handle */
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hnd = malloc(sizeof(*hnd));
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if (hnd == NULL) return(NULL);
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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(*hnd));
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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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/* 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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{
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unsigned short ffdta_seg, ffdta_off;
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unsigned short path_seg, path_off;
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unsigned short sattr = searchAttr;
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ffdta_seg = FP_SEG(hnd);
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ffdta_off = FP_OFF(hnd);
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path_seg = FP_SEG(path);
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path_off = FP_OFF(path);
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_asm {
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push ax
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push bx
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push cx
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push dx
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push es
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mov ah, 0x2F //; Get Current DTA
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int 0x21 //; 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, 0x1A //; Set Current DTA to our buffer, DS:DX
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mov dx, ffdta_off
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push ds
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mov ds, ffdta_seg
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int 0x21 //; Execute interrupt
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pop ds
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mov ax, 0x4E00 //; Actual findfirst call
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mov cx, sattr
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mov dx, path_off //; Load DS:DX with pointer to path for Findfirt
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push ds
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mov ds, path_seg
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int 0x21 //; Execute interrupt
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pop ds
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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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success:
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mov ah, 0x1A //; 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 0x21 //; Execute interrupt to restore.
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mov ds, dx //; Restore DS
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pop es
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pop dx
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pop cx
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pop bx
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pop ax
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}
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}
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if (cflag) {
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free(hnd);
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return(NULL);
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}
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/* copy its results over */
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copyFileData(findData, hnd);
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return hnd;
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}
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int FindNextFile(struct FFDTA *hnd, struct WIN32_FIND_DATA *findData) {
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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) 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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{ /* Use DOS (0x4F) findnext, returning if error */
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unsigned short dta_seg = FP_SEG(hnd);
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unsigned short dta_off = FP_OFF(hnd);
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_asm {
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push ax
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push bx
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push cx
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push dx
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push es
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mov ah, 0x2F //; Get Current DTA
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int 0x21 //; 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 ax, 0x1A00 //; Set Current DTA to our buffer, DS:DX
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mov dx, dta_off
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push ds
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mov ds, dta_seg
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int 0x21 //; Execute interrupt
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pop ds
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mov ax, 0x4F00 //; Actual findnext call
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int 0x21 //; 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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success:
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mov ah, 0x1A //; 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 0x21 //; Execute interrupt to restore.
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mov ds, dx //; Restore DS
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pop es
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pop dx
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pop cx
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pop bx
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pop ax
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}
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}
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if (cflag) return 0;
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/* copy its results over */
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copyFileData(findData, hnd);
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return 1;
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}
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/* free resources to prevent memory leaks */
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void FindClose(struct FFDTA *hnd) {
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/* 1st check if valid handle given */
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if (hnd == NULL) return;
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free(hnd); /* Free memory used for the handle itself */
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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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/* returns zero on failure, if lpRootPathName is NULL or "" we use current
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* default drive. */
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int GetVolumeInformation(const char *lpRootPathName, char *lpVolumeNameBuffer,
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DWORD nVolumeNameSize, DWORD *lpVolumeSerialNumber) {
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/* Using DOS interrupt to get serial number */
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struct media_info {
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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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/* Stores the root path we use. */
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char pathname[260];
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unsigned short cflag;
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/* validate root path to obtain info on, NULL or "" means use current */
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if ((lpRootPathName == NULL) || (*lpRootPathName == '\0')) {
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/* Assume if NULL user wants current drive, eg C:\ */
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_asm {
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push ax
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push bx
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mov ah, 0x19 //; Get Current Default Drive
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int 0x21 //; returned in AL, 0=A, 1=B,...
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lea bx, pathname //; load pointer to our buffer
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add al, 'A' //; Convert #returned to a letter
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mov [bx], al //; Store drive letter
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inc bx //; point to next character
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mov byte ptr [bx], ':' //; Store the colon
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inc bx
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mov byte ptr [bx], '\' //; this gets converted correctly as a single bkslsh
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inc bx
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mov byte ptr [bx], 0 //; Most importantly the '\0' terminator
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pop bx
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pop ax
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}
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} else {
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strcpy(pathname, lpRootPathName);
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}
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/* if a drive, test if valid, get volume, and possibly serial # */
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/* assume these calls will succeed, change on an error */
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cflag = 0;
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/* get path ending in \*.*, */
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if (pathname[strlen(pathname)-1] != '\\') {
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strcat(pathname, "\\*.*");
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} else {
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strcat(pathname, "*.*");
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}
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/* Search for volume using old findfirst, as LFN version (NT5 DOS box) does
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* not recognize FILE_A_VOL = 0x0008 as label attribute.
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*/
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{
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struct FFDTA finfo;
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unsigned short attr_seg = FP_SEG(finfo.ff_attr);
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unsigned short attr_off = FP_OFF(finfo.ff_attr);
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unsigned short finfo_seg = FP_SEG(&finfo);
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unsigned short finfo_off = FP_OFF(&finfo);
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unsigned short pathname_seg = FP_SEG(pathname);
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unsigned short pathname_off = FP_OFF(pathname);
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_asm {
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push ax
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push bx
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push cx
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push dx
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push es
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mov ah, 0x2F //; Get Current DTA
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int 0x21 //; 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, 0x1A //; Set Current DTA to our buffer, DS:DX
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mov dx, finfo_off //; Load our buffer for new DTA.
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push ds
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mov ds, finfo_seg
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int 0x21 //; Execute interrupt
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pop ds
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mov ax, 0x4E00 //; Actual findfirst call
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mov cx, FILE_A_VOL
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mov dx, pathname_off //; Load DS:DX with pointer to modified RootPath for Findfirt
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push ds
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mov ds, pathname_seg
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int 0x21 //; Execute interrupt, Carry set on error, unset on success
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pop ds
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336 |
jnc success //; If carry is not set then succesful
|
|
|
337 |
mov [cflag], ax //; Set flag with error.
|
|
|
338 |
jmp cleanup //; Restore DTA
|
|
|
339 |
success: //; True volume entry only has volume attribute set [MS' LFNspec]
|
|
|
340 |
mov bx, attr_off
|
|
|
341 |
push es
|
|
|
342 |
mov es, attr_seg
|
|
|
343 |
mov al, [es:bx] //; Looking for a BYTE that is FILE_ATTRIBUTE_LABEL only
|
|
|
344 |
pop es
|
|
|
345 |
and al, 0xDF //; Ignore Archive bit
|
2047 |
mateusz.vi |
346 |
cmp al, FILE_A_VOL
|
2045 |
mateusz.vi |
347 |
je cleanup //; They match, so should be true volume entry.
|
|
|
348 |
mov ax, 0x4F00 //; Otherwise keep looking (findnext)
|
|
|
349 |
int 0x21 //; Execute interrupt
|
|
|
350 |
jnc success //; If carry is not set then succesful
|
|
|
351 |
mov [cflag], ax //; Set flag with error.
|
|
|
352 |
cleanup:
|
|
|
353 |
mov ah, 0x1A //; Set Current DTA back to original, DS:DX
|
|
|
354 |
mov dx, ds //; Store DS, must be preserved
|
|
|
355 |
pop ds //; Popping ES into DS since thats where we need it.
|
|
|
356 |
pop bx //; Now DS:BX points to original DTA
|
|
|
357 |
int 0x21 //; Execute interrupt to restore.
|
|
|
358 |
mov ds, dx //; Restore DS
|
2019 |
mateusz.vi |
359 |
|
2044 |
mateusz.vi |
360 |
pop es
|
|
|
361 |
pop dx
|
|
|
362 |
pop cx
|
|
|
363 |
pop bx
|
|
|
364 |
pop ax
|
2019 |
mateusz.vi |
365 |
}
|
|
|
366 |
|
2045 |
mateusz.vi |
367 |
/* copy over volume label, if buffer given */
|
|
|
368 |
if (lpVolumeNameBuffer != NULL) {
|
|
|
369 |
if (cflag != 0) { /* error or no label */
|
|
|
370 |
lpVolumeNameBuffer[0] = '\0';
|
|
|
371 |
} else { /* copy up to buffer's size of label */
|
|
|
372 |
strncpy(lpVolumeNameBuffer, finfo.ff_name, nVolumeNameSize);
|
|
|
373 |
lpVolumeNameBuffer[nVolumeNameSize-1] = '\0';
|
|
|
374 |
/* slide characters over if longer than 8 to remove . */
|
|
|
375 |
if (lpVolumeNameBuffer[8] == '.') {
|
|
|
376 |
lpVolumeNameBuffer[8] = lpVolumeNameBuffer[9];
|
|
|
377 |
lpVolumeNameBuffer[9] = lpVolumeNameBuffer[10];
|
|
|
378 |
lpVolumeNameBuffer[10] = lpVolumeNameBuffer[11];
|
|
|
379 |
lpVolumeNameBuffer[11] = '\0';
|
2019 |
mateusz.vi |
380 |
}
|
|
|
381 |
}
|
2045 |
mateusz.vi |
382 |
}
|
|
|
383 |
}
|
2019 |
mateusz.vi |
384 |
|
2045 |
mateusz.vi |
385 |
/* Test for no label found, which is not an error,
|
|
|
386 |
Note: added the check for 0x02 as FreeDOS returns this instead
|
|
|
387 |
at least for disks with LFN entries and no volume label.
|
|
|
388 |
*/
|
|
|
389 |
if ((cflag == 0x12) || /* No more files or */
|
|
|
390 |
(cflag == 0x02)) { /* File not found */
|
|
|
391 |
cflag = 0; /* so assume valid drive */
|
|
|
392 |
}
|
2019 |
mateusz.vi |
393 |
|
2045 |
mateusz.vi |
394 |
/* Get Serial Number, only supports drives mapped to letters */
|
|
|
395 |
media.serial = 0; /* set to 0, stays 0 on an error */
|
|
|
396 |
{
|
|
|
397 |
unsigned short media_off = FP_OFF(&media);
|
|
|
398 |
unsigned short media_seg = FP_SEG(&media);
|
|
|
399 |
unsigned char drv = (pathname[0] & 0xDF) - 'A' + 1;
|
|
|
400 |
_asm {
|
|
|
401 |
push ax
|
|
|
402 |
push bx
|
|
|
403 |
push cx
|
|
|
404 |
push dx
|
2019 |
mateusz.vi |
405 |
|
2045 |
mateusz.vi |
406 |
xor bh, bh
|
|
|
407 |
mov bl, drv //; Clear BH, drive in BL
|
|
|
408 |
mov cx, 0x0866 //; CH=disk drive, CL=Get Serial #
|
|
|
409 |
mov ax, 0x440D //; Generic IOCTL
|
|
|
410 |
mov dx, media_off //; DS:DX pointer to media structure
|
|
|
411 |
push ds
|
|
|
412 |
mov ds, media_seg
|
|
|
413 |
int 0x21
|
|
|
414 |
pop ds
|
2044 |
mateusz.vi |
415 |
|
2045 |
mateusz.vi |
416 |
pop dx
|
|
|
417 |
pop cx
|
|
|
418 |
pop bx
|
|
|
419 |
pop ax
|
2019 |
mateusz.vi |
420 |
}
|
|
|
421 |
}
|
2026 |
mateusz.vi |
422 |
|
2045 |
mateusz.vi |
423 |
if (lpVolumeSerialNumber != NULL) *lpVolumeSerialNumber = media.serial;
|
|
|
424 |
|
2019 |
mateusz.vi |
425 |
/* If there was an error getting the validating drive return failure) */
|
2045 |
mateusz.vi |
426 |
if (cflag) { /* cflag is nonzero on any errors )*/
|
2019 |
mateusz.vi |
427 |
return 0; /* zero means error! */
|
2045 |
mateusz.vi |
428 |
} else {
|
2019 |
mateusz.vi |
429 |
return 1; /* Success (drive exists we think anyway) */
|
2045 |
mateusz.vi |
430 |
}
|
2019 |
mateusz.vi |
431 |
}
|
|
|
432 |
|
2041 |
mateusz.vi |
433 |
|
|
|
434 |
/* retrieve attributes (ReadOnly/System/...) about file or directory
|
|
|
435 |
* returns (DWORD)-1 on error
|
|
|
436 |
*/
|
2047 |
mateusz.vi |
437 |
int GetFileAttributes(unsigned short *attr, const char *pathname) {
|
2041 |
mateusz.vi |
438 |
union REGS r;
|
|
|
439 |
struct SREGS s;
|
|
|
440 |
char buffer[260];
|
|
|
441 |
int slen;
|
|
|
442 |
|
|
|
443 |
/* we must remove any slashes from end */
|
|
|
444 |
slen = strlen(pathname) - 1; /* Warning, assuming pathname is not "" */
|
|
|
445 |
strcpy(buffer, pathname);
|
2045 |
mateusz.vi |
446 |
if ((buffer[slen] == '\\') || (buffer[slen] == '/')) { /* ends in a slash */
|
2041 |
mateusz.vi |
447 |
/* don't remove from root directory (slen == 0),
|
|
|
448 |
* ignore UNC paths as SFN doesn't handle them anyway
|
|
|
449 |
* if slen == 2, then check if drive given (e.g. C:\)
|
|
|
450 |
*/
|
|
|
451 |
if (slen && !(slen == 2 && buffer[1] == ':'))
|
|
|
452 |
buffer[slen] = '\0';
|
|
|
453 |
}
|
|
|
454 |
/* return standard attributes */
|
|
|
455 |
r.x.ax = 0x4300; /* standard Get/Set File Attributes */
|
|
|
456 |
r.x.dx = FP_OFF(buffer); /* DS:DX points to ASCIIZ filename */
|
|
|
457 |
segread(&s); /* load with current segment values */
|
|
|
458 |
s.ds = FP_SEG(buffer); /* get Segment of our filename pointer */
|
|
|
459 |
intdosx(&r, &r, &s); /* invoke the DOS int21h call */
|
|
|
460 |
|
|
|
461 |
//if (r.x.cflag) printf("ERROR getting std attributes of %s, DOS err %i\n", buffer, r.x.ax);
|
2047 |
mateusz.vi |
462 |
if (r.x.cflag) return(-1); /* error obtaining attributes */
|
|
|
463 |
*attr = (0x3F & r.x.cx); /* mask off any DRDOS bits */
|
|
|
464 |
return(0);
|
2041 |
mateusz.vi |
465 |
}
|