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fpc/rtl/unix/dos.pp

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{
$Id$
This file is part of the Free Pascal run time library.
Copyright (c) 1999-2000 by Michael Van Canneyt and Peter Vreman,
members 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;
Interface
Const
{Max FileName Length for files}
FileNameLen=255;
Type
SearchRec =
{$ifndef ARM}
packed
{$endif ARM}
Record
{Fill : array[1..21] of byte; Fill replaced with below}
SearchNum : LongInt; {to track which search this is}
SearchPos : LongInt; {directory position}
DirPtr : Pointer; {directory pointer for reading directory}
SearchType : Byte; {0=normal, 1=open will close, 2=only 1 file}
SearchAttr : Byte; {attribute we are searching for}
Fill : Array[1..07] of Byte; {future use}
{End of fill}
Attr : Byte; {attribute of found file}
Time : LongInt; {last modify date of found file}
Size : LongInt; {file size of found file}
Reserved : Word; {future use}
Name : String[FileNameLen]; {name of found file}
SearchSpec : String[FileNameLen]; {search pattern}
NamePos : Word; {end of path, start of name position}
End;
{$ifdef cpui386}
Registers = packed record
case i : integer of
0 : (ax,f1,bx,f2,cx,f3,dx,f4,bp,f5,si,f51,di,f6,ds,f7,es,f8,flags,fs,gs : word);
1 : (al,ah,f9,f10,bl,bh,f11,f12,cl,ch,f13,f14,dl,dh : byte);
2 : (eax, ebx, ecx, edx, ebp, esi, edi : longint);
End;
{$endif cpui386}
{$i dosh.inc}
{Extra Utils}
function weekday(y,m,d : longint) : longint;
Procedure UnixDateToDt(SecsPast: LongInt; Var Dt: DateTime);
Function DTToUnixDate(DT: DateTime): LongInt;
{Disk}
Procedure AddDisk(const path:string);
Implementation
Uses
Strings,UnixUtil,Unix,BaseUnix,UnixType;
{******************************************************************************
--- Link C Lib if set ---
******************************************************************************}
type
RtlInfoType = Record
FMode,
FInode,
FUid,
FGid,
FSize,
FMTime : LongInt;
End;
{******************************************************************************
--- Info / Date / Time ---
******************************************************************************}
Const
{Date Calculation}
C1970 = 2440588;
D0 = 1461;
D1 = 146097;
D2 = 1721119;
type
GTRec = packed Record
Year,
Month,
MDay,
WDay,
Hour,
Minute,
Second : Word;
End;
Function DosVersion:Word;
Var
Buffer : Array[0..255] of Char;
Tmp2,
TmpStr : String[40];
TmpPos,
SubRel,
Rel : LongInt;
info : utsname;
Begin
FPUName(info);
Move(info.release,buffer[0],40);
TmpStr:=StrPas(Buffer);
SubRel:=0;
TmpPos:=Pos('.',TmpStr);
if TmpPos>0 then
begin
Tmp2:=Copy(TmpStr,TmpPos+1,40);
Delete(TmpStr,TmpPos,40);
end;
TmpPos:=Pos('.',Tmp2);
if TmpPos>0 then
Delete(Tmp2,TmpPos,40);
Val(TmpStr,Rel);
Val(Tmp2,SubRel);
DosVersion:=Rel+(SubRel shl 8);
End;
function WeekDay (y,m,d:longint):longint;
{
Calculates th day of the week. returns -1 on error
}
var
u,v : longint;
begin
if (m<1) or (m>12) or (y<1600) or (y>4000) or
(d<1) or (d>30+((m+ord(m>7)) and 1)-ord(m=2)) or
((m*d=58) and (((y mod 4>0) or (y mod 100=0)) and (y mod 400>0))) then
WeekDay:=-1
else
begin
u:=m;
v:=y;
if m<3 then
begin
inc(u,12);
dec(v);
end;
WeekDay:=(d+2*u+((3*(u+1)) div 5)+v+(v div 4)-(v div 100)+(v div 400)+1) mod 7;
end;
end;
Procedure GetDate(Var Year, Month, MDay, WDay: Word);
Begin
Unix.GetDate(Year,Month,MDay);
Wday:=weekday(Year,Month,MDay);
end;
Procedure SetDate(Year, Month, Day: Word);
Begin
Unix.SetDate ( Year, Month, Day );
End;
Procedure GetTime(Var Hour, Minute, Second, Sec100: Word);
Begin
Unix.GetTime(Hour,Minute,Second,Sec100);
end;
Procedure SetTime(Hour, Minute, Second, Sec100: Word);
Begin
Unix.SetTime ( Hour, Minute, Second );
End;
Procedure packtime(var t : datetime;var p : longint);
Begin
p:=(t.sec shr 1)+(t.min shl 5)+(t.hour shl 11)+(t.day shl 16)+(t.month shl 21)+((t.year-1980) shl 25);
End;
Procedure unpacktime(p : longint;var t : datetime);
Begin
t.sec:=(p and 31) shl 1;
t.min:=(p shr 5) and 63;
t.hour:=(p shr 11) and 31;
t.day:=(p shr 16) and 31;
t.month:=(p shr 21) and 15;
t.year:=(p shr 25)+1980;
End;
Procedure UnixDateToDt(SecsPast: LongInt; Var Dt: DateTime);
Begin
EpochToLocal(SecsPast,dt.Year,dt.Month,dt.Day,dt.Hour,dt.Min,dt.Sec);
End;
Function DTToUnixDate(DT: DateTime): LongInt;
Begin
DTToUnixDate:=LocalToEpoch(dt.Year,dt.Month,dt.Day,dt.Hour,dt.Min,dt.Sec);
End;
{******************************************************************************
--- Exec ---
******************************************************************************}
{$ifdef HASTHREADVAR}
{$ifdef VER1_9_2}
var
{$else VER1_9_2}
threadvar
{$endif VER1_9_2}
{$else HASTHREADVAR}
var
{$endif HASTHREADVAR}
LastDosExitCode: word;
Procedure Exec (Const Path: PathStr; Const ComLine: ComStr);
var
pid : longint;
// The Error-Checking in the previous Version failed, since halt($7F) gives an WaitPid-status of $7F00
Begin
LastDosExitCode:=0;
pid:=fpFork;
if pid=0 then
begin
{The child does the actual exec, and then exits}
if ComLine='' then
Execl(Path)
else
Execl(Path+' '+ComLine);
{If the execve fails, we return an exitvalue of 127, to let it be known}
fpExit(127);
end
else
if pid=-1 then {Fork failed}
begin
DosError:=8;
exit
end;
{We're in the parent, let's wait.}
LastDosExitCode:=WaitProcess(pid); // WaitPid and result-convert
if (LastDosExitCode>=0) and (LastDosExitCode<>127) then
DosError:=0
else
DosError:=8; // perhaps one time give an better error
End;
Function DosExitCode: Word;
Begin
DosExitCode:=LastDosExitCode;
End;
{******************************************************************************
--- Disk ---
******************************************************************************}
{
The Diskfree and Disksize functions need a file on the specified drive, since this
is required for the statfs system call.
These filenames are set in drivestr[0..26], and have been preset to :
0 - '.' (default drive - hence current dir is ok.)
1 - '/fd0/.' (floppy drive 1 - should be adapted to local system )
2 - '/fd1/.' (floppy drive 2 - should be adapted to local system )
3 - '/' (C: equivalent of dos is the root partition)
4..26 (can be set by you're own applications)
! Use AddDisk() to Add new drives !
They both return -1 when a failure occurs.
}
Const
FixDriveStr : array[0..3] of pchar=(
'.',
'/fd0/.',
'/fd1/.',
'/.'
);
const
Drives : byte = 4;
var
DriveStr : array[4..26] of pchar;
Procedure AddDisk(const path:string);
begin
if not (DriveStr[Drives]=nil) then
FreeMem(DriveStr[Drives],StrLen(DriveStr[Drives])+1);
GetMem(DriveStr[Drives],length(Path)+1);
StrPCopy(DriveStr[Drives],path);
inc(Drives);
if Drives>26 then
Drives:=4;
end;
Function DiskFree(Drive: Byte): int64;
var
fs : tstatfs;
Begin
if ((Drive<4) and (not (fixdrivestr[Drive]=nil)) and (StatFS(StrPas(fixdrivestr[drive]),fs)<>-1)) or
((not (drivestr[Drive]=nil)) and (StatFS(StrPas(drivestr[drive]),fs)<>-1)) then
Diskfree:=int64(fs.bavail)*int64(fs.bsize)
else
Diskfree:=-1;
End;
Function DiskSize(Drive: Byte): int64;
var
fs : tstatfs;
Begin
if ((Drive<4) and (not (fixdrivestr[Drive]=nil)) and (StatFS(StrPas(fixdrivestr[drive]),fs)<>-1)) or
((not (drivestr[Drive]=nil)) and (StatFS(StrPas(drivestr[drive]),fs)<>-1)) then
DiskSize:=int64(fs.blocks)*int64(fs.bsize)
else
DiskSize:=-1;
End;
{******************************************************************************
--- Findfirst FindNext ---
******************************************************************************}
Const
RtlFindSize = 15;
Type
RtlFindRecType = Record
DirPtr : Pointer;
SearchNum,
LastUsed : LongInt;
End;
Var
RtlFindRecs : Array[1..RtlFindSize] of RtlFindRecType;
CurrSearchNum : LongInt;
Procedure FindClose(Var f: SearchRec);
{
Closes dirptr if it is open
}
Var
i : longint;
Begin
if f.SearchType=0 then
begin
i:=1;
repeat
if (RtlFindRecs[i].SearchNum=f.SearchNum) then
break;
inc(i);
until (i>RtlFindSize);
If i<=RtlFindSize Then
Begin
RtlFindRecs[i].SearchNum:=0;
if f.dirptr<>nil then
fpclosedir(pdir(f.dirptr)^);
End;
end;
f.dirptr:=nil;
End;
Function FindGetFileInfo(const s:string;var f:SearchRec):boolean;
var
DT : DateTime;
Info : RtlInfoType;
st : baseunix.stat;
begin
FindGetFileInfo:=false;
if not fpstat(s,st)>=0 then
exit;
info.FSize:=st.st_Size;
info.FMTime:=st.st_mtime;
if (st.st_mode and STAT_IFMT)=STAT_IFDIR then
info.fmode:=$10
else
info.fmode:=$0;
if (st.st_mode and STAT_IWUSR)=0 then
info.fmode:=info.fmode or 1;
if s[f.NamePos+1]='.' then
info.fmode:=info.fmode or $2;
If ((Info.FMode and Not(f.searchattr))=0) Then
Begin
f.Name:=Copy(s,f.NamePos+1,255);
f.Attr:=Info.FMode;
f.Size:=Info.FSize;
UnixDateToDT(Info.FMTime, DT);
PackTime(DT,f.Time);
FindGetFileInfo:=true;
End;
end;
Function FindLastUsed: Longint;
{
Find unused or least recently used dirpointer slot in findrecs array
}
Var
BestMatch,i : Longint;
Found : Boolean;
Begin
BestMatch:=1;
i:=1;
Found:=False;
While (i <= RtlFindSize) And (Not Found) Do
Begin
If (RtlFindRecs[i].SearchNum = 0) Then
Begin
BestMatch := i;
Found := True;
End
Else
Begin
If RtlFindRecs[i].LastUsed > RtlFindRecs[BestMatch].LastUsed Then
BestMatch := i;
End;
Inc(i);
End;
FindLastUsed := BestMatch;
End;
Procedure FindNext(Var f: SearchRec);
{
re-opens dir if not already in array and calls FindWorkProc
}
Var
DirName : Array[0..256] of Char;
i,
ArrayPos : Longint;
FName,
SName : string;
Found,
Finished : boolean;
p : PDirEnt;
Begin
If f.SearchType=0 Then
Begin
ArrayPos:=0;
For i:=1 to RtlFindSize Do
Begin
If RtlFindRecs[i].SearchNum = f.SearchNum Then
ArrayPos:=i;
Inc(RtlFindRecs[i].LastUsed);
End;
If ArrayPos=0 Then
Begin
If f.NamePos = 0 Then
Begin
DirName[0] := '.';
DirName[1] := '/';
DirName[2] := #0;
End
Else
Begin
Move(f.SearchSpec[1], DirName[0], f.NamePos);
DirName[f.NamePos] := #0;
End;
f.DirPtr := fpopendir(@(DirName));
If f.DirPtr <> nil Then
begin
ArrayPos:=FindLastUsed;
If RtlFindRecs[ArrayPos].SearchNum > 0 Then
FpCloseDir((pdir(rtlfindrecs[arraypos].dirptr)^));
RtlFindRecs[ArrayPos].SearchNum := f.SearchNum;
RtlFindRecs[ArrayPos].DirPtr := f.DirPtr;
if f.searchpos>0 then
seekdir(pdir(f.dirptr), f.searchpos);
end;
End;
if ArrayPos>0 then
RtlFindRecs[ArrayPos].LastUsed:=0;
end;
{Main loop}
SName:=Copy(f.SearchSpec,f.NamePos+1,255);
Found:=False;
Finished:=(f.dirptr=nil);
While Not Finished Do
Begin
p:=fpreaddir(pdir(f.dirptr)^);
if p=nil then
FName:=''
else
FName:=Strpas(@p^.d_name);
If FName='' Then
Finished:=True
Else
Begin
If FNMatch(SName,FName) Then
Begin
Found:=FindGetFileInfo(Copy(f.SearchSpec,1,f.NamePos)+FName,f);
if Found then
Finished:=true;
End;
End;
End;
{Shutdown}
If Found Then
Begin
f.searchpos:=telldir(pdir(f.dirptr));
DosError:=0;
End
Else
Begin
FindClose(f);
DosError:=18;
End;
End;
Procedure FindFirst(Const Path: PathStr; Attr: Word; Var f: SearchRec);
{
opens dir and calls FindWorkProc
}
Begin
fillchar(f,sizeof(f),0);
if Path='' then
begin
DosError:=3;
exit;
end;
{Create Info}
f.SearchSpec := Path;
{We always also search for readonly and archive, regardless of Attr:}
f.SearchAttr := Attr or archive or readonly;
f.SearchPos := 0;
f.NamePos := Length(f.SearchSpec);
while (f.NamePos>0) and (f.SearchSpec[f.NamePos]<>'/') do
dec(f.NamePos);
{Wildcards?}
if (Pos('?',Path)=0) and (Pos('*',Path)=0) then
begin
if FindGetFileInfo(Path,f) then
DosError:=0
else
begin
{ According to tdos2 test it should return 18
if ErrNo=Sys_ENOENT then
DosError:=3
else }
DosError:=18;
end;
f.DirPtr:=nil;
f.SearchType:=1;
f.searchnum:=-1;
end
else
{Find Entry}
begin
Inc(CurrSearchNum);
f.SearchNum:=CurrSearchNum;
f.SearchType:=0;
FindNext(f);
end;
End;
{******************************************************************************
--- File ---
******************************************************************************}
Procedure FSplit(Path: PathStr; Var Dir: DirStr; Var Name: NameStr;Var Ext: ExtStr);
Begin
UnixUtil.FSplit(Path,Dir,Name,Ext);
End;
Function FExpand(Const Path: PathStr): PathStr;
Begin
FExpand:=Unix.FExpand(Path);
End;
Function FSearch(path : pathstr;dirlist : string) : pathstr;
Var
info : BaseUnix.stat;
Begin
if (length(Path)>0) and (path[1]='/') and (fpStat(path,info)>=0) then
FSearch:=path
else
FSearch:=Unix.FSearch(path,dirlist);
End;
Procedure GetFAttr(var f; var attr : word);
Var
info : baseunix.stat;
LinAttr : longint;
Begin
DosError:=0;
if FPStat(strpas(@textrec(f).name),info)<0 then
begin
Attr:=0;
DosError:=3;
exit;
end
else
LinAttr:=Info.st_Mode;
if fpS_ISDIR(LinAttr) then
Attr:=$10
else
Attr:=$0;
if fpAccess(strpas(@textrec(f).name),W_OK)<0 then
Attr:=Attr or $1;
if filerec(f).name[0]='.' then
Attr:=Attr or $2;
end;
Procedure getftime (var f; var time : longint);
Var
Info: baseunix.stat;
DT: DateTime;
Begin
doserror:=0;
if fpfstat(filerec(f).handle,info)<0 then
begin
Time:=0;
doserror:=6;
exit
end
else
UnixDateToDT(Info.st_mTime,DT);
PackTime(DT,Time);
End;
Procedure setftime(var f; time : longint);
Var
utim: utimbuf;
DT: DateTime;
path: pathstr;
index: Integer;
Begin
doserror:=0;
with utim do
begin
actime:=getepochtime;
UnPackTime(Time,DT);
modtime:=DTToUnixDate(DT);
end;
path := strpas(@filerec(f).name);
if fputime(path,@utim)<0 then
begin
Time:=0;
doserror:=3;
end;
End;
{******************************************************************************
--- Environment ---
******************************************************************************}
Function EnvCount: Longint;
var
envcnt : longint;
p : ppchar;
Begin
envcnt:=0;
p:=envp; {defined in syslinux}
while (p^<>nil) do
begin
inc(envcnt);
inc(p);
end;
EnvCount := envcnt
End;
Function EnvStr (Index: longint): String;
Var
i : longint;
p : ppchar;
Begin
if Index <= 0 then
envstr:=''
else
begin
p:=envp; {defined in syslinux}
i:=1;
while (i<Index) and (p^<>nil) do
begin
inc(i);
inc(p);
end;
if p=nil then
envstr:=''
else
envstr:=strpas(p^)
end;
end;
Function GetEnv(EnvVar: String): String;
var
p : pchar;
Begin
p:=BaseUnix.fpGetEnv(EnvVar);
if p=nil then
GetEnv:=''
else
GetEnv:=StrPas(p);
End;
{******************************************************************************
--- Do Nothing Procedures/Functions ---
******************************************************************************}
{$ifdef cpui386}
Procedure Intr (intno: byte; var regs: registers);
Begin
{! No Unix equivalent !}
End;
Procedure msdos(var regs : registers);
Begin
{! No Unix equivalent !}
End;
{$endif cpui386}
Procedure getintvec(intno : byte;var vector : pointer);
Begin
{! No Unix equivalent !}
End;
Procedure setintvec(intno : byte;vector : pointer);
Begin
{! No Unix equivalent !}
End;
Procedure SwapVectors;
Begin
{! No Unix equivalent !}
End;
Procedure keep(exitcode : word);
Begin
{! No Unix equivalent !}
End;
Procedure setfattr (var f;attr : word);
Begin
{! No Unix equivalent !}
{ Fail for setting VolumeId }
if (attr and VolumeID)<>0 then
doserror:=5;
End;
Procedure GetCBreak(Var BreakValue: Boolean);
Begin
{! No Unix equivalent !}
breakvalue:=true
End;
Procedure SetCBreak(BreakValue: Boolean);
Begin
{! No Unix equivalent !}
End;
Procedure GetVerify(Var Verify: Boolean);
Begin
{! No Unix equivalent !}
Verify:=true;
End;
Procedure SetVerify(Verify: Boolean);
Begin
{! No Unix equivalent !}
End;
function GetShortName(var p : String) : boolean;
begin
{ short=long under *nix}
GetShortName:=True;
end;
function GetLongName(var p : String) : boolean;
begin
{ short=long under *nix}
GetLongName:=True;
end;
{******************************************************************************
--- Initialization ---
******************************************************************************}
End.
{
$Log$
Revision 1.33 2004-07-25 22:46:34 olle
* envstr now returns empty string when index out of bounds
Revision 1.32 2004/03/14 18:42:39 peter
* reset searchrec info in findfirst
Revision 1.31 2004/03/04 22:15:16 marco
* UnixType changes. Please report problems to me.
Revision 1.30 2004/02/18 22:00:45 peter
* dirptr changed to pointer
Revision 1.29 2004/02/18 19:08:27 florian
* fixed bootstrapping with 1.9.2
Revision 1.28 2004/02/17 17:37:26 daniel
* Enable threadvars again
Revision 1.27 2004/02/16 22:18:44 hajny
* LastDosExitCode changed back from threadvar temporarily
Revision 1.26 2004/02/15 21:36:10 hajny
* overloaded ExecuteProcess added, EnvStr param changed to longint
Revision 1.25 2004/02/09 17:01:28 marco
* fixes to get it working under FreeBSD, and probably Linux too
Revision 1.24 2004/02/09 12:03:16 michael
+ Switched to single interface in dosh.inc
Revision 1.23 2004/01/31 16:15:14 florian
* packing of searchrec for arm fixed
Revision 1.22 2003/12/29 21:15:04 jonas
* fixed setftime (sorry Marco :)
Revision 1.21 2003/12/03 20:17:03 olle
* files are not pretended to have attr ARCHIVED anymore
+ FindFirst etc now also filters on attr HIDDEN
* files with attr READONLY and ARCHIVE are always returned by FindFirst etc
Revision 1.19 2003/10/17 22:13:30 olle
* changed i386 to cpui386
Revision 1.18 2003/09/27 12:51:33 peter
* fpISxxx macros renamed to C compliant fpS_ISxxx
Revision 1.17 2003/09/17 17:30:46 marco
* Introduction of unixutil
Revision 1.16 2003/09/14 20:15:01 marco
* Unix reform stage two. Remove all calls from Unix that exist in Baseunix.
Revision 1.15 2003/05/16 20:56:06 florian
no message
Revision 1.14 2003/05/14 13:51:03 florian
* ifdef'd code which i386 specific
Revision 1.13 2002/12/08 16:05:34 peter
* small error code fixes so tdos2 passes
Revision 1.12 2002/09/07 16:01:27 peter
* old logs removed and tabs fixed
}
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