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fpc/rtl/go32v2/dos.pp

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{
$Id$
This file is part of the Free Pascal run time library.
Copyright (c) 1999-2000 by the Free Pascal development team.
Dos unit for BP7 compatible RTL
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
**********************************************************************}
unit dos;
interface
Uses
Go32;
Type
searchrec = packed record
fill : array[1..21] of byte;
attr : byte;
time : longint;
{ reserved : word; not in DJGPP V2 }
size : longint;
name : string[255]; { LFN Name, DJGPP uses only [12] but more can't hurt (PFV) }
end;
{$DEFINE HAS_REGISTERS}
Registers = Go32.Registers;
{$i dosh.inc}
implementation
uses
strings;
{$DEFINE HAS_GETMSCOUNT}
{$DEFINE HAS_INTR}
{$DEFINE HAS_SETCBREAK}
{$DEFINE HAS_GETCBREAK}
{$DEFINE HAS_SETVERIFY}
{$DEFINE HAS_GETVERIFY}
{$DEFINE HAS_SWAPVECTORS}
{$DEFINE HAS_GETSHORTNAME}
{$DEFINE HAS_GETLONGNAME}
{$DEFINE FPC_FEXPAND_UNC} (* UNC paths are supported *)
{$DEFINE FPC_FEXPAND_DRIVES} (* Full paths begin with drive specification *)
{$I dos.inc}
{******************************************************************************
--- Dos Interrupt ---
******************************************************************************}
var
dosregs : registers;
procedure LoadDosError;
var
r : registers;
SimpleDosError : word;
begin
if (dosregs.flags and fcarry) <> 0 then
begin
{ I got a extended error = 0
while CarryFlag was set from Exec function }
SimpleDosError:=dosregs.ax;
r.eax:=$5900;
r.ebx:=$0;
realintr($21,r);
{ conversion from word to integer !!
gave a Bound check error if ax is $FFFF !! PM }
doserror:=integer(r.ax);
case doserror of
0 : DosError:=integer(SimpleDosError);
19 : DosError:=150;
21 : DosError:=152;
end;
end
else
doserror:=0;
end;
procedure intr(intno : byte;var regs : registers);
begin
realintr(intno,regs);
end;
{******************************************************************************
--- Info / Date / Time ---
******************************************************************************}
function dosversion : word;
begin
dosregs.ax:=$3000;
msdos(dosregs);
dosversion:=dosregs.ax;
end;
procedure getdate(var year,month,mday,wday : word);
begin
dosregs.ax:=$2a00;
msdos(dosregs);
wday:=dosregs.al;
year:=dosregs.cx;
month:=dosregs.dh;
mday:=dosregs.dl;
end;
procedure setdate(year,month,day : word);
begin
dosregs.cx:=year;
dosregs.dh:=month;
dosregs.dl:=day;
dosregs.ah:=$2b;
msdos(dosregs);
end;
procedure gettime(var hour,minute,second,sec100 : word);
begin
dosregs.ah:=$2c;
msdos(dosregs);
hour:=dosregs.ch;
minute:=dosregs.cl;
second:=dosregs.dh;
sec100:=dosregs.dl;
end;
procedure settime(hour,minute,second,sec100 : word);
begin
dosregs.ch:=hour;
dosregs.cl:=minute;
dosregs.dh:=second;
dosregs.dl:=sec100;
dosregs.ah:=$2d;
msdos(dosregs);
end;
function GetMsCount: int64;
begin
GetMsCount := MemL [$40:$6c] * 55;
end;
{******************************************************************************
--- Exec ---
******************************************************************************}
procedure exec(const path : pathstr;const comline : comstr);
type
realptr = packed record
ofs,seg : word;
end;
texecblock = packed record
envseg : word;
comtail : realptr;
firstFCB : realptr;
secondFCB : realptr;
iniStack : realptr;
iniCSIP : realptr;
end;
var
current_dos_buffer_pos,
arg_ofs,
i,la_env,
la_p,la_c,la_e,
fcb1_la,fcb2_la : longint;
execblock : texecblock;
c,p : string;
function paste_to_dos(src : string) : boolean;
var
c : array[0..255] of char;
begin
paste_to_dos:=false;
if current_dos_buffer_pos+length(src)+1>transfer_buffer+tb_size then
RunError(217);
move(src[1],c[0],length(src));
c[length(src)]:=#0;
seg_move(get_ds,longint(@c),dosmemselector,current_dos_buffer_pos,length(src)+1);
current_dos_buffer_pos:=current_dos_buffer_pos+length(src)+1;
paste_to_dos:=true;
end;
begin
{ create command line }
move(comline[0],c[1],length(comline)+1);
c[length(comline)+2]:=#13;
c[0]:=char(length(comline)+2);
{ create path }
p:=path;
for i:=1 to length(p) do
if p[i]='/' then
p[i]:='\';
if LFNSupport then
GetShortName(p);
{ create buffer }
la_env:=transfer_buffer;
while (la_env and 15)<>0 do
inc(la_env);
current_dos_buffer_pos:=la_env;
{ copy environment }
for i:=1 to envcount do
paste_to_dos(envstr(i));
paste_to_dos(''); { adds a double zero at the end }
{ allow slash as backslash }
la_p:=current_dos_buffer_pos;
paste_to_dos(p);
la_c:=current_dos_buffer_pos;
paste_to_dos(c);
la_e:=current_dos_buffer_pos;
fcb1_la:=la_e;
la_e:=la_e+16;
fcb2_la:=la_e;
la_e:=la_e+16;
{ allocate FCB see dosexec code }
arg_ofs:=1;
while (c[arg_ofs] in [' ',#9]) do
inc(arg_ofs);
dosregs.ax:=$2901;
dosregs.ds:=(la_c+arg_ofs) shr 4;
dosregs.esi:=(la_c+arg_ofs) and 15;
dosregs.es:=fcb1_la shr 4;
dosregs.edi:=fcb1_la and 15;
msdos(dosregs);
{ allocate second FCB see dosexec code }
repeat
inc(arg_ofs);
until (c[arg_ofs] in [' ',#9,#13]);
if c[arg_ofs]<>#13 then
begin
repeat
inc(arg_ofs);
until not (c[arg_ofs] in [' ',#9]);
end;
dosregs.ax:=$2901;
dosregs.ds:=(la_c+arg_ofs) shr 4;
dosregs.si:=(la_c+arg_ofs) and 15;
dosregs.es:=fcb2_la shr 4;
dosregs.di:=fcb2_la and 15;
msdos(dosregs);
with execblock do
begin
envseg:=la_env shr 4;
comtail.seg:=la_c shr 4;
comtail.ofs:=la_c and 15;
firstFCB.seg:=fcb1_la shr 4;
firstFCB.ofs:=fcb1_la and 15;
secondFCB.seg:=fcb2_la shr 4;
secondFCB.ofs:=fcb2_la and 15;
end;
seg_move(get_ds,longint(@execblock),dosmemselector,la_e,sizeof(texecblock));
dosregs.edx:=la_p and 15;
dosregs.ds:=la_p shr 4;
dosregs.ebx:=la_e and 15;
dosregs.es:=la_e shr 4;
dosregs.ax:=$4b00;
msdos(dosregs);
LoadDosError;
if DosError=0 then
begin
dosregs.ax:=$4d00;
msdos(dosregs);
LastDosExitCode:=DosRegs.al
end
else
LastDosExitCode:=0;
end;
procedure getcbreak(var breakvalue : boolean);
begin
dosregs.ax:=$3300;
msdos(dosregs);
breakvalue:=dosregs.dl<>0;
end;
procedure setcbreak(breakvalue : boolean);
begin
dosregs.ax:=$3301;
dosregs.dl:=ord(breakvalue);
msdos(dosregs);
end;
procedure getverify(var verify : boolean);
begin
dosregs.ah:=$54;
msdos(dosregs);
verify:=dosregs.al<>0;
end;
procedure setverify(verify : boolean);
begin
dosregs.ah:=$2e;
dosregs.al:=ord(verify);
msdos(dosregs);
end;
{******************************************************************************
--- Disk ---
******************************************************************************}
TYPE ExtendedFat32FreeSpaceRec=packed Record
RetSize : WORD; { (ret) size of returned structure}
Strucversion : WORD; {(call) structure version (0000h)
(ret) actual structure version (0000h)}
SecPerClus, {number of sectors per cluster}
BytePerSec, {number of bytes per sector}
AvailClusters, {number of available clusters}
TotalClusters, {total number of clusters on the drive}
AvailPhysSect, {physical sectors available on the drive}
TotalPhysSect, {total physical sectors on the drive}
AvailAllocUnits, {Available allocation units}
TotalAllocUnits : DWORD; {Total allocation units}
Dummy,Dummy2 : DWORD; {8 bytes reserved}
END;
function do_diskdata(drive : byte; Free : BOOLEAN) : Int64;
VAR
S : String;
Rec : ExtendedFat32FreeSpaceRec;
BEGIN
if (swap(dosversion)>=$070A) AND LFNSupport then
begin
S:='C:\'#0;
if Drive=0 then
begin
GetDir(Drive,S);
Setlength(S,4);
S[4]:=#0;
end
else
S[1]:=chr(Drive+64);
Rec.Strucversion:=0;
dosmemput(tb_segment,tb_offset,Rec,SIZEOF(ExtendedFat32FreeSpaceRec));
dosmemput(tb_segment,tb_offset+Sizeof(ExtendedFat32FreeSpaceRec)+1,S[1],4);
dosregs.dx:=tb_offset+Sizeof(ExtendedFat32FreeSpaceRec)+1;
dosregs.ds:=tb_segment;
dosregs.di:=tb_offset;
dosregs.es:=tb_segment;
dosregs.cx:=Sizeof(ExtendedFat32FreeSpaceRec);
dosregs.ax:=$7303;
msdos(dosregs);
if (dosregs.flags and fcarry) = 0 then {No error clausule in int except cf}
begin
copyfromdos(rec,Sizeof(ExtendedFat32FreeSpaceRec));
if Free then
Do_DiskData:=int64(rec.AvailAllocUnits)*rec.SecPerClus*rec.BytePerSec
else
Do_DiskData:=int64(rec.TotalAllocUnits)*rec.SecPerClus*rec.BytePerSec;
end
else
Do_DiskData:=-1;
end
else
begin
dosregs.dl:=drive;
dosregs.ah:=$36;
msdos(dosregs);
if dosregs.ax<>$FFFF then
begin
if Free then
Do_DiskData:=int64(dosregs.ax)*dosregs.bx*dosregs.cx
else
Do_DiskData:=int64(dosregs.ax)*dosregs.cx*dosregs.dx;
end
else
do_diskdata:=-1;
end;
end;
function diskfree(drive : byte) : int64;
begin
diskfree:=Do_DiskData(drive,TRUE);
end;
function disksize(drive : byte) : int64;
begin
disksize:=Do_DiskData(drive,false);
end;
{******************************************************************************
--- LFNFindfirst LFNFindNext ---
******************************************************************************}
type
LFNSearchRec=packed record
attr,
crtime,
crtimehi,
actime,
actimehi,
lmtime,
lmtimehi,
sizehi,
size : longint;
reserved : array[0..7] of byte;
name : array[0..259] of byte;
shortname : array[0..13] of byte;
end;
procedure LFNSearchRec2Dos(const w:LFNSearchRec;hdl:longint;var d:Searchrec;from_findfirst : boolean);
var
Len : longint;
begin
With w do
begin
FillChar(d,sizeof(SearchRec),0);
if DosError=0 then
len:=StrLen(@Name)
else
len:=0;
d.Name[0]:=chr(len);
Move(Name[0],d.Name[1],Len);
d.Time:=lmTime;
d.Size:=Size;
d.Attr:=Attr and $FF;
if (DosError<>0) and from_findfirst then
hdl:=-1;
Move(hdl,d.Fill,4);
end;
end;
procedure LFNFindFirst(path:pchar;attr:longint;var s:searchrec);
var
i : longint;
w : LFNSearchRec;
begin
{ allow slash as backslash }
for i:=0 to strlen(path) do
if path[i]='/' then path[i]:='\';
dosregs.si:=1; { use ms-dos time }
{ don't include the label if not asked for it, needed for network drives }
if attr=$8 then
dosregs.ecx:=8
else
dosregs.ecx:=attr and (not 8);
dosregs.edx:=tb_offset+Sizeof(LFNSearchrec)+1;
dosmemput(tb_segment,tb_offset+Sizeof(LFNSearchrec)+1,path^,strlen(path)+1);
dosregs.ds:=tb_segment;
dosregs.edi:=tb_offset;
dosregs.es:=tb_segment;
dosregs.ax:=$714e;
msdos(dosregs);
LoadDosError;
copyfromdos(w,sizeof(LFNSearchRec));
LFNSearchRec2Dos(w,dosregs.ax,s,true);
end;
procedure LFNFindNext(var s:searchrec);
var
hdl : longint;
w : LFNSearchRec;
begin
Move(s.Fill,hdl,4);
dosregs.si:=1; { use ms-dos time }
dosregs.edi:=tb_offset;
dosregs.es:=tb_segment;
dosregs.ebx:=hdl;
dosregs.ax:=$714f;
msdos(dosregs);
LoadDosError;
copyfromdos(w,sizeof(LFNSearchRec));
LFNSearchRec2Dos(w,hdl,s,false);
end;
procedure LFNFindClose(var s:searchrec);
var
hdl : longint;
begin
Move(s.Fill,hdl,4);
{ Do not call MsDos if FindFirst returned with an error }
if hdl=-1 then
begin
DosError:=0;
exit;
end;
dosregs.ebx:=hdl;
dosregs.ax:=$71a1;
msdos(dosregs);
LoadDosError;
end;
{******************************************************************************
--- DosFindfirst DosFindNext ---
******************************************************************************}
procedure dossearchrec2searchrec(var f : searchrec);
var
len : longint;
begin
{ Check is necessary!! OS/2's VDM doesn't clear the name with #0 if the }
{ file doesn't exist! (JM) }
if dosError = 0 then
len:=StrLen(@f.Name)
else len := 0;
Move(f.Name[0],f.Name[1],Len);
f.Name[0]:=chr(len);
end;
procedure DosFindfirst(path : pchar;attr : word;var f : searchrec);
var
i : longint;
begin
{ allow slash as backslash }
for i:=0 to strlen(path) do
if path[i]='/' then path[i]:='\';
copytodos(f,sizeof(searchrec));
dosregs.edx:=tb_offset;
dosregs.ds:=tb_segment;
dosregs.ah:=$1a;
msdos(dosregs);
dosregs.ecx:=attr;
dosregs.edx:=tb_offset+Sizeof(searchrec)+1;
dosmemput(tb_segment,tb_offset+Sizeof(searchrec)+1,path^,strlen(path)+1);
dosregs.ds:=tb_segment;
dosregs.ah:=$4e;
msdos(dosregs);
copyfromdos(f,sizeof(searchrec));
LoadDosError;
dossearchrec2searchrec(f);
end;
procedure Dosfindnext(var f : searchrec);
begin
copytodos(f,sizeof(searchrec));
dosregs.edx:=tb_offset;
dosregs.ds:=tb_segment;
dosregs.ah:=$1a;
msdos(dosregs);
dosregs.ah:=$4f;
msdos(dosregs);
copyfromdos(f,sizeof(searchrec));
LoadDosError;
dossearchrec2searchrec(f);
end;
{******************************************************************************
--- Findfirst FindNext ---
******************************************************************************}
procedure findfirst(const path : pathstr;attr : word;var f : searchRec);
var
path0 : array[0..256] of char;
begin
doserror:=0;
strpcopy(path0,path);
if LFNSupport then
LFNFindFirst(path0,attr,f)
else
Dosfindfirst(path0,attr,f);
end;
procedure findnext(var f : searchRec);
begin
doserror:=0;
if LFNSupport then
LFNFindnext(f)
else
Dosfindnext(f);
end;
Procedure FindClose(Var f: SearchRec);
begin
DosError:=0;
if LFNSupport then
LFNFindClose(f);
end;
type swap_proc = procedure;
var
_swap_in : swap_proc;external name '_swap_in';
_swap_out : swap_proc;external name '_swap_out';
_exception_exit : pointer;external name '_exception_exit';
_v2prt0_exceptions_on : longbool;external name '_v2prt0_exceptions_on';
procedure swapvectors;
begin
if _exception_exit<>nil then
if _v2prt0_exceptions_on then
_swap_out()
else
_swap_in();
end;
{******************************************************************************
--- File ---
******************************************************************************}
Function FSearch(path: pathstr; dirlist: string): pathstr;
var
i,p1 : longint;
s : searchrec;
newdir : pathstr;
begin
{ check if the file specified exists }
findfirst(path,anyfile and not(directory),s);
if doserror=0 then
begin
findclose(s);
fsearch:=path;
exit;
end;
{ No wildcards allowed in these things }
if (pos('?',path)<>0) or (pos('*',path)<>0) then
fsearch:=''
else
begin
{ allow slash as backslash }
for i:=1 to length(dirlist) do
if dirlist[i]='/' then dirlist[i]:='\';
repeat
p1:=pos(';',dirlist);
if p1<>0 then
begin
newdir:=copy(dirlist,1,p1-1);
delete(dirlist,1,p1);
end
else
begin
newdir:=dirlist;
dirlist:='';
end;
if (newdir<>'') and (not (newdir[length(newdir)] in ['\',':'])) then
newdir:=newdir+'\';
findfirst(newdir+path,anyfile and not(directory),s);
if doserror=0 then
newdir:=newdir+path
else
newdir:='';
until (dirlist='') or (newdir<>'');
fsearch:=newdir;
end;
findclose(s);
end;
{ change to short filename if successful DOS call PM }
function GetShortName(var p : String) : boolean;
var
c : array[0..255] of char;
begin
move(p[1],c[0],length(p));
c[length(p)]:=#0;
copytodos(c,length(p)+1);
dosregs.ax:=$7160;
dosregs.cx:=1;
dosregs.ds:=tb_segment;
dosregs.si:=tb_offset;
dosregs.es:=tb_segment;
dosregs.di:=tb_offset;
msdos(dosregs);
LoadDosError;
if DosError=0 then
begin
copyfromdos(c,255);
move(c[0],p[1],strlen(c));
p[0]:=char(strlen(c));
GetShortName:=true;
end
else
GetShortName:=false;
end;
{ change to long filename if successful DOS call PM }
function GetLongName(var p : String) : boolean;
var
c : array[0..255] of char;
begin
move(p[1],c[0],length(p));
c[length(p)]:=#0;
copytodos(c,length(p)+1);
dosregs.ax:=$7160;
dosregs.cx:=2;
dosregs.ds:=tb_segment;
dosregs.si:=tb_offset;
dosregs.es:=tb_segment;
dosregs.di:=tb_offset;
msdos(dosregs);
LoadDosError;
if DosError=0 then
begin
copyfromdos(c,255);
move(c[0],p[1],strlen(c));
p[0]:=char(strlen(c));
GetLongName:=true;
end
else
GetLongName:=false;
end;
{******************************************************************************
--- Get/Set File Time,Attr ---
******************************************************************************}
procedure getftime(var f;var time : longint);
begin
dosregs.bx:=textrec(f).handle;
dosregs.ax:=$5700;
msdos(dosregs);
loaddoserror;
time:=(dosregs.dx shl 16)+dosregs.cx;
end;
procedure setftime(var f;time : longint);
begin
dosregs.bx:=textrec(f).handle;
dosregs.cx:=time and $ffff;
dosregs.dx:=time shr 16;
dosregs.ax:=$5701;
msdos(dosregs);
loaddoserror;
end;
procedure getfattr(var f;var attr : word);
begin
copytodos(filerec(f).name,strlen(filerec(f).name)+1);
dosregs.edx:=tb_offset;
dosregs.ds:=tb_segment;
if LFNSupport then
begin
dosregs.ax:=$7143;
dosregs.bx:=0;
end
else
dosregs.ax:=$4300;
msdos(dosregs);
LoadDosError;
Attr:=dosregs.cx;
end;
procedure setfattr(var f;attr : word);
begin
copytodos(filerec(f).name,strlen(filerec(f).name)+1);
dosregs.edx:=tb_offset;
dosregs.ds:=tb_segment;
if LFNSupport then
begin
dosregs.ax:=$7143;
dosregs.bx:=1;
end
else
dosregs.ax:=$4301;
dosregs.cx:=attr;
msdos(dosregs);
LoadDosError;
end;
{******************************************************************************
--- Environment ---
******************************************************************************}
function envcount : longint;
var
hp : ppchar;
begin
hp:=envp;
envcount:=0;
while assigned(hp^) do
begin
inc(envcount);
inc(hp);
end;
end;
function envstr (Index: longint): string;
begin
if (index<=0) or (index>envcount) then
begin
envstr:='';
exit;
end;
envstr:=strpas(ppchar(pointer(envp)+4*(index-1))^);
end;
Function GetEnv(envvar: string): string;
var
hp : ppchar;
hs : string;
eqpos : longint;
begin
envvar:=upcase(envvar);
hp:=envp;
getenv:='';
while assigned(hp^) do
begin
hs:=strpas(hp^);
eqpos:=pos('=',hs);
if upcase(copy(hs,1,eqpos-1))=envvar then
begin
getenv:=copy(hs,eqpos+1,255);
exit;
end;
inc(hp);
end;
end;
end.
{
$Log$
Revision 1.22 2004-12-05 16:44:43 hajny
* GetMsCount added, platform independent routines moved to single include file
Revision 1.21 2004/02/17 17:37:26 daniel
* Enable threadvars again
Revision 1.20 2004/02/16 22:16:59 hajny
* LastDosExitCode changed back from threadvar temporarily
Revision 1.19 2004/02/15 21:34:06 hajny
* overloaded ExecuteProcess added, EnvStr param changed to longint
Revision 1.18 2004/02/09 12:03:16 michael
+ Switched to single interface in dosh.inc
Revision 1.17 2004/01/06 00:58:35 florian
* fixed fsearch
Revision 1.16 2003/10/03 21:46:25 peter
* stdcall fixes
Revision 1.15 2002/09/07 16:01:18 peter
* old logs removed and tabs fixed
}
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