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|
{****************************************************************************
Free Pascal Runtime-Library
DOS unit for OS/2
Copyright (c) 1997,1999-2000 by Daniel Mantione,
member of the Free Pascal development team
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;
{$ASMMODE ATT}
{***************************************************************************}
interface
{***************************************************************************}
{$PACKRECORDS 1}
uses Strings, DosCalls;
Type
{Search record which is used by findfirst and findnext:}
SearchRec = record
case boolean of
false: (Handle: THandle; {Used in os_OS2 mode}
FStat: PFileFindBuf3;
Fill: array [1..21 - SizeOf (THandle) - SizeOf (pointer)]
of byte;
Attr: byte;
Time: longint;
Size: longint;
Name: string); {Filenames can be long in OS/2!}
true: (Fill2: array [1..21] of byte;
Attr2: byte;
Time2: longint;
Size2: longint;
Name2: string); {Filenames can be long in OS/2!}
end;
{Flags for the exec procedure:
}
threadvar
(* For compatibility with VP/2, used for runflags in Exec procedure. *)
ExecFlags: cardinal;
(* Note that the TP/BP compatible method for retrieval of exit codes *)
(* is limited to only one (the last) execution! Including the following *)
(* two variables in the interface part allows querying the status of *)
(* of asynchronously started programs using DosWaitChild with dtNoWait *)
(* parameter, i.e. without waiting for the final program result (as *)
(* opposed to calling DosExitCode which would wait for the exit code). *)
LastExecRes: TResultCodes;
LastExecFlags: cardinal;
{$i dosh.inc}
{OS/2 specific functions}
function GetEnvPChar (EnvVar: string): PChar;
function DosErrorModuleName: string;
(* In case of an error in Dos.Exec returns the name of the module *)
(* causing the problem - e.g. name of a missing or corrupted DLL. *)
(* It may also contain a queue name in case of a failed attempt *)
(* to create queue for reading results of started sessions. *)
implementation
{$DEFINE HAS_GETMSCOUNT}
{$DEFINE HAS_DOSEXITCODE}
{$DEFINE FPC_FEXPAND_UNC} (* UNC paths are supported *)
{$DEFINE FPC_FEXPAND_DRIVES} (* Full paths begin with drive specification *)
{$DEFINE FPC_FEXPAND_GETENV_PCHAR}
{$I dos.inc}
threadvar
LastDosErrorModuleName: string;
const FindResvdMask = $00003737; {Allowed bits in attribute
specification for DosFindFirst call.}
function GetMsCount: int64;
var
L: cardinal;
begin
DosQuerySysInfo (svMsCount, svMsCount, L, 4);
GetMsCount := L;
end;
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 }
DoDirSeparators(dirlist);
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;
procedure getftime(var f;var time:longint);
var
FStat: TFileStatus3;
begin
DosError := DosQueryFileInfo (FileRec (F).Handle, ilStandard, @FStat,
SizeOf (FStat));
if DosError=0 then
begin
Time := FStat.TimeLastWrite + longint (FStat.DateLastWrite) shl 16;
if Time = 0 then
Time := FStat.TimeCreation + longint (FStat.DateCreation) shl 16;
end
else
begin
Time:=0;
OSErrorWatch (DosError);
if DosError = 87 then
DosError := 6; (* Align to TP/BP behaviour *)
end;
end;
procedure SetFTime (var F; Time: longint);
var FStat: TFileStatus3;
RC: cardinal;
begin
RC := DosQueryFileInfo (FileRec (F).Handle, ilStandard, @FStat,
SizeOf (FStat));
if RC = 0 then
begin
FStat.DateLastAccess := Hi (Time);
FStat.DateLastWrite := Hi (Time);
FStat.TimeLastAccess := Lo (Time);
FStat.TimeLastWrite := Lo (Time);
RC := DosSetFileInfo (FileRec (F).Handle, ilStandard, @FStat,
SizeOf (FStat));
if RC <> 0 then
OSErrorWatch (RC);
end
else
begin
OSErrorWatch (RC);
if RC = 87 then
RC := 6;
end;
DosError := integer (RC);
end;
function DosExitCode: word;
var
Res: TResultCodes;
PPID: cardinal;
RC: cardinal;
begin
if (LastExecFlags = deAsyncResult) or (LastExecFlags = deAsyncResultDb) then
begin
RC := DosWaitChild (DCWA_PROCESS, dtWait, Res, PPID, LastExecRes.PID);
if RC = 0 then
(* If we succeeded, the process is finished - possible future querying
of DosExitCode shall return the result immediately as with synchronous
execution. *)
begin
LastExecFlags := deSync;
LastExecRes := Res;
end
else
begin
LastExecRes.ExitCode := RC shl 16;
OSErrorWatch (RC);
end;
end;
if LastExecRes.ExitCode > high (word) then
DosExitCode := high (word)
else
DosExitCode := LastExecRes.ExitCode and $FFFF;
end;
procedure Exec (const Path: PathStr; const ComLine: ComStr);
{Execute a program.}
var
Args0, Args: PByteArray;
ArgSize: word;
ObjName: string;
Res: TResultCodes;
RC, RC2: cardinal;
ExecAppType: cardinal;
HQ: THandle;
SPID, STID, QName: string;
SID, PID: cardinal;
SD: TStartData;
RD: TRequestData;
PCI: PChildInfo;
CISize: cardinal;
Prio: byte;
DSS: boolean;
SR: SearchRec;
MaxArgsSize: PtrUInt; (* Amount of memory reserved for arguments in bytes. *)
MaxArgsSizeInc: word;
PathZ: array [0..255] of char;
begin
{ LastDosExitCode := Exec (Path, ExecRunFlags (ExecFlags), efDefault, ComLine);}
ObjName := '';
(* FExpand should be used only for the DosStartSession part
and only if the executable is in the current directory. *)
FindFirst (Path, AnyFile, SR);
if DosError = 0 then
QName := FExpand (Path)
else
QName := Path;
FindClose (SR);
MaxArgsSize := Length (ComLine) + Length (QName) + 256; (* More than enough *)
if MaxArgsSize > high (word) then
begin
DosError := 8; (* Not quite, but "not enough memory" is close enough *)
Exit;
end;
if ComLine = '' then
begin
Args0 := nil;
Args := nil;
StrPCopy (PathZ, Path);
RC := DosQueryAppType (@PathZ [0], ExecAppType);
end
else
begin
GetMem (Args0, MaxArgsSize);
Args := Args0;
(* Work around a bug in OS/2 - argument to DosExecPgm *)
(* should not cross a 64K boundary. *)
while ((PtrUInt (Args) + MaxArgsSize) and $FFFF) < MaxArgsSize do
begin
MaxArgsSizeInc := MaxArgsSize -
((PtrUInt (Args) + MaxArgsSize) and $FFFF);
Inc (MaxArgsSize, MaxArgsSizeInc);
if MaxArgsSize > high (word) then
begin
DosError := 8; (* Not quite, but "not enough memory" is close enough *)
Exit;
end;
ReallocMem (Args0, MaxArgsSize);
Inc (pointer (Args), MaxArgsSizeInc);
end;
ArgSize := 0;
Move (QName [1], Args^ [ArgSize], Length (QName));
Inc (ArgSize, Length (QName));
Args^ [ArgSize] := 0;
Inc (ArgSize);
{Now do the real arguments.}
Move (ComLine [1], Args^ [ArgSize], Length (ComLine));
Inc (ArgSize, Length (ComLine));
Args^ [ArgSize] := 0;
Inc (ArgSize);
Args^ [ArgSize] := 0;
RC := DosQueryAppType (PChar (Args), ExecAppType);
end;
if RC <> 0 then
OSErrorWatch (RC)
else
if (ApplicationType and 3 = ExecAppType and 3) then
(* DosExecPgm should work... *)
begin
DSS := false;
Res.ExitCode := $FFFFFFFF;
RC := DosExecPgm (ObjName, cardinal (ExecFlags), Args, nil, Res, Path);
if RC = 0 then
begin
LastExecFlags := ExecFlags;
LastExecRes := Res;
LastDosErrorModuleName := '';
end
else
begin
if (RC = 190) or (RC = 191) then
DSS := true;
OSErrorWatch (RC);
end;
end
else
DSS := true;
if DSS then
begin
Str (GetProcessID, SPID);
Str (ThreadID, STID);
QName := '\QUEUES\FPC_Dos_Exec_p' + SPID + 't' + STID + '.QUE'#0;
FillChar (SD, SizeOf (SD), 0);
SD.Length := SizeOf (SD);
RC := 0;
case ExecFlags of
deSync:
begin
SD.Related := ssf_Related_Child;
LastExecFlags := ExecFlags;
SD.TermQ := @QName [1];
RC := DosCreateQueue (HQ, quFIFO or quConvert_Address, @QName [1]);
if RC <> 0 then
OSErrorWatch (RC);
end;
deAsync,
deAsyncResult:
begin
(* Current implementation of DosExitCode does not support retrieval *)
(* of result codes for other session types started asynchronously. *)
LastExecFlags := deAsync;
SD.Related := ssf_Related_Independent;
end;
deBackground:
begin
(* Current implementation of DosExitCode does not support retrieval *)
(* of result codes for other session types started asynchronously. *)
LastExecFlags := ExecFlags;
SD.Related := ssf_Related_Independent;
SD.FgBg := ssf_FgBg_Back;
end;
deAsyncResultDB:
begin
(* Current implementation of DosExitCode does not support retrieval *)
(* of result codes for other session types started asynchronously. *)
LastExecFlags := ExecFlags;
SD.Related := ssf_Related_Child;
SD.TraceOpt := ssf_TraceOpt_Trace;
end;
end;
if RC <> 0 then
ObjName := Copy (QName, 1, Pred (Length (QName)))
else
begin
if Args = nil then
(* No parameters passed, Args not allocated for DosExecPgm, so allocate now. *)
begin
GetMem (Args0, MaxArgsSize);
Args := Args0;
Move (QName [1], Args^ [0], Length (QName));
Args^ [Length (QName)] := 0;
end
else
SD.PgmInputs := PChar (@Args^ [Length (QName) + 1]);
SD.PgmName := PChar (Args);
SD.InheritOpt := ssf_InhertOpt_Parent;
SD.ObjectBuffer := @ObjName [1];
SD.ObjectBuffLen := SizeOf (ObjName) - 1;
RC := DosStartSession (SD, SID, PID);
if RC <> 0 then
OSErrorWatch (RC);
if (RC = 0) or (RC = 457) then
begin
LastExecRes.PID := PID;
if ExecFlags = deSync then
begin
RC := DosReadQueue (HQ, RD, CISize, PCI, 0, 0, Prio, 0);
if RC <> 0 then
OSErrorWatch (RC);
if (RC = 0) and (PCI^.SessionID = SID) then
begin
LastExecRes.ExitCode := PCI^.Return;
RC2 := DosCloseQueue (HQ);
if RC2 <> 0 then
OSErrorWatch (RC2);
RC2 := DosFreeMem (PCI);
if RC2 <> 0 then
OSErrorWatch (RC2);
end
else
begin
RC2 := DosCloseQueue (HQ);
if RC2 <> 0 then
OSErrorWatch (RC2);
end;
end;
end
else if ExecFlags = deSync then
begin
RC2 := DosCloseQueue (HQ);
if RC2 <> 0 then
OSErrorWatch (RC2);
end;
end;
end;
if RC <> 0 then
begin
LastDosErrorModuleName := ObjName;
LastExecFlags := deSync;
LastExecRes.ExitCode := 0; (* Needed for TP/BP compatibility *)
LastExecRes.TerminateReason := $FFFFFFFF;
end;
DosError := RC;
if Args0 <> nil then
FreeMem (Args0, MaxArgsSize);
end;
function DosErrorModuleName: string;
begin
DosErrorModuleName := LastDosErrorModuleName;
end;
function dosversion:word;
{Returns OS/2 version}
var
Minor, Major: Cardinal;
begin
DosQuerySysInfo(svMajorVersion, svMajorVersion, Major, 4);
DosQuerySysInfo(svMinorVersion, svMinorVersion, Minor, 4);
DosVersion:=Major or Minor shl 8;
end;
procedure GetDate (var Year, Month, MDay, WDay: word);
Var
dt: TDateTime;
begin
DosGetDateTime(dt);
Year:=dt.year;
Month:=dt.month;
MDay:=dt.Day;
WDay:=dt.Weekday;
end;
procedure SetDate (Year, Month, Day: word);
var
DT: TDateTime;
RC: cardinal;
begin
DosGetDateTime (DT);
DT.Year := Year;
DT.Month := byte (Month);
DT.Day := byte (Day);
RC := DosSetDateTime (DT);
if RC <> 0 then
OSErrorWatch (RC);
end;
procedure GetTime (var Hour, Minute, Second, Sec100: word);
var
dt: TDateTime;
begin
DosGetDateTime(dt);
Hour:=dt.Hour;
Minute:=dt.Minute;
Second:=dt.Second;
Sec100:=dt.Hundredths;
end;
procedure SetTime (Hour, Minute, Second, Sec100: word);
var
DT: TDateTime;
RC: cardinal;
begin
DosGetDateTime (DT);
DT.Hour := byte (Hour);
DT.Minute := byte (Minute);
DT.Second := byte (Second);
DT.Sec100 := byte (Sec100);
RC := DosSetDateTime (DT);
if RC <> 0 then
OSErrorWatch (RC);
end;
function DiskFree (Drive: byte): int64;
var FI: TFSinfo;
RC: cardinal;
begin
{In OS/2, we use the filesystem information.}
RC := DosQueryFSInfo (Drive, 1, FI, SizeOf (FI));
if RC = 0 then
DiskFree := int64 (FI.Free_Clusters) *
int64 (FI.Sectors_Per_Cluster) * int64 (FI.Bytes_Per_Sector)
else
begin
DiskFree := -1;
OSErrorWatch (RC);
end;
end;
function DiskSize (Drive: byte): int64;
var FI: TFSinfo;
RC: cardinal;
begin
RC := DosQueryFSinfo (Drive, 1, FI, SizeOf (FI));
if RC = 0 then
DiskSize := int64 (FI.Total_Clusters) *
int64 (FI.Sectors_Per_Cluster) * int64 (FI.Bytes_Per_Sector)
else
begin
DiskSize := -1;
OSErrorWatch (RC);
end;
end;
procedure DosSearchRec2SearchRec (var F: SearchRec);
type
TRec = record
T, D: word;
end;
begin
with F do
begin
Name := FStat^.Name;
Size := FStat^.FileSize;
Attr := byte(FStat^.AttrFile and $FF);
TRec (Time).T := FStat^.TimeLastWrite;
TRec (Time).D := FStat^.DateLastWrite;
end;
end;
procedure FindFirst (const Path: PathStr; Attr: word; var F: SearchRec);
var Count: cardinal;
begin
{No error.}
DosError := 0;
New (F.FStat);
F.Handle := THandle ($FFFFFFFF);
Count := 1;
DosError := integer (DosFindFirst (Path, F.Handle,
Attr and FindResvdMask, F.FStat, SizeOf (F.FStat^),
Count, ilStandard));
if DosError <> 0 then
OSErrorWatch (DosError)
else if Count = 0 then
DosError := 18;
DosSearchRec2SearchRec (F);
end;
procedure FindNext (var F: SearchRec);
var
Count: cardinal;
begin
{No error}
DosError := 0;
Count := 1;
DosError := integer (DosFindNext (F.Handle, F.FStat, SizeOf (F.FStat^),
Count));
if DosError <> 0 then
OSErrorWatch (DosError)
else if Count = 0 then
DosError := 18;
DosSearchRec2SearchRec (F);
end;
procedure FindClose (var F: SearchRec);
begin
if F.Handle <> THandle ($FFFFFFFF) then
begin
DosError := integer (DosFindClose (F.Handle));
if DosError <> 0 then
OSErrorWatch (DosError);
end;
Dispose (F.FStat);
end;
function envcount:longint;
begin
envcount:=envc;
end;
function envstr (index : longint) : string;
var hp:Pchar;
begin
if (index<=0) or (index>envcount) then
begin
envstr:='';
exit;
end;
hp:=EnvP[index-1];
envstr:=strpas(hp);
end;
function GetEnvPChar (EnvVar: string): PChar;
(* The assembler version is more than three times as fast as Pascal. *)
var
P: PChar;
begin
EnvVar := UpCase (EnvVar);
{$ASMMODE INTEL}
asm
cld
mov edi, Environment
lea esi, EnvVar
xor eax, eax
lodsb
@NewVar:
cmp byte ptr [edi], 0
jz @Stop
push eax { eax contains length of searched variable name }
push esi { esi points to the beginning of the variable name }
mov ecx, -1 { our character ('=' - see below) _must_ be found }
mov edx, edi { pointer to beginning of variable name saved in edx }
mov al, '=' { searching until '=' (end of variable name) }
repne
scasb { scan until '=' not found }
neg ecx { what was the name length? }
dec ecx { corrected }
dec ecx { exclude the '=' character }
pop esi { restore pointer to beginning of variable name }
pop eax { restore length of searched variable name }
push eax { and save both of them again for later use }
push esi
cmp ecx, eax { compare length of searched variable name with name }
jnz @NotEqual { ... of currently found variable, jump if different }
xchg edx, edi { pointer to current variable name restored in edi }
repe
cmpsb { compare till the end of variable name }
xchg edx, edi { pointer to beginning of variable contents in edi }
jz @Equal { finish if they're equal }
@NotEqual:
xor eax, eax { look for 00h }
mov ecx, -1 { it _must_ be found }
repne
scasb { scan until found }
pop esi { restore pointer to beginning of variable name }
pop eax { restore length of searched variable name }
jmp @NewVar { ... or continue with new variable otherwise }
@Stop:
xor eax, eax
mov P, eax { Not found - return nil }
jmp @End
@Equal:
pop esi { restore the stack position }
pop eax
mov P, edi { place pointer to variable contents in P }
@End:
end ['eax','ecx','edx','esi','edi'];
GetEnvPChar := P;
end;
{$ASMMODE ATT}
Function GetEnv(envvar: string): string;
(* The assembler version is more than three times as fast as Pascal. *)
begin
GetEnv := StrPas (GetEnvPChar (EnvVar));
end;
procedure GetFAttr (var F; var Attr: word);
var
PathInfo: TFileStatus3;
RC: cardinal;
{$ifndef FPC_ANSI_TEXTFILEREC}
R: rawbytestring;
{$endif not FPC_ANSI_TEXTFILEREC}
P: pchar;
begin
Attr := 0;
{$ifdef FPC_ANSI_TEXTFILEREC}
P := @FileRec (F).Name;
{$else FPC_ANSI_TEXTFILEREC}
R := ToSingleByteFileSystemEncodedFileName (FileRec (F).Name);
P := PChar (R);
{$endif FPC_ANSI_TEXTFILEREC}
RC := DosQueryPathInfo (P, ilStandard, @PathInfo, SizeOf (PathInfo));
DosError := integer (RC);
if RC = 0 then
Attr := PathInfo.AttrFile
else
begin
OSErrorWatch (RC);
if FileRec (F).Name [0] = #0 then
DosError := 3; (* Align the returned error value to TP/BP *)
end;
end;
procedure SetFAttr (var F; Attr: word);
var
PathInfo: TFileStatus3;
RC: cardinal;
{$ifndef FPC_ANSI_TEXTFILEREC}
R: rawbytestring;
{$endif not FPC_ANSI_TEXTFILEREC}
P: pchar;
begin
{$ifdef FPC_ANSI_TEXTFILEREC}
P := @FileRec (F).Name;
{$else FPC_ANSI_TEXTFILEREC}
R := ToSingleByteFileSystemEncodedFileName (FileRec (F).Name);
P := PChar (R);
{$endif FPC_ANSI_TEXTFILEREC}
RC := DosQueryPathInfo (P, ilStandard, @PathInfo, SizeOf (PathInfo));
if RC = 0 then
begin
PathInfo.AttrFile := Attr;
RC := DosSetPathInfo (P, ilStandard, @PathInfo, SizeOf (PathInfo), 0);
if RC <> 0 then
begin
OSErrorWatch (RC);
if Attr and VolumeID = VolumeID then
RC := 5; (* Align the returned error value to TP/BP *)
end;
end
else
begin
OSErrorWatch (RC);
if FileRec (F).Name [0] = #0 then
RC := 3; (* Align the returned error value to TP/BP *)
end;
DosError := integer (RC);
end;
{function GetShortName(var p : String) : boolean;
begin
GetShortName:=true;}
{$WARNING EA .shortname support (see FAT32 driver) should be probably added here!}
{end;
function GetLongName(var p : String) : boolean;
begin
GetLongName:=true;}
{$WARNING EA .longname support should be probably added here!}
{end;}
begin
FillChar (LastExecRes, SizeOf (LastExecRes), 0);
LastDosErrorModuleName := '';
ExecFlags := 0;
LastExecFlags := deSync;
end.
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