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42a00b7705
fpc/rtl/linux/syslinux.pp
peter 42a00b7705 * remove handle check for do_close
2000-03-23 15:24:18 +00:00

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{
$Id$
This file is part of the Free Pascal run time library.
Copyright (c) 1999-2000 by Michael Van Canneyt,
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.
**********************************************************************}
{ These things are set in the makefile, }
{ But you can override them here.}
{ If you want to link to the C library, set the conditional crtlib }
{ $define crtlib}
{ If you use an aout system, set the conditional AOUT}
{ $Define AOUT}
Unit SysLinux;
Interface
{$ifdef m68k}
{ used for single computations }
const
BIAS4 = $7f-1;
{$endif}
{$I systemh.inc}
{$I heaph.inc}
const
UnusedHandle = -1;
StdInputHandle = 0;
StdOutputHandle = 1;
StdErrorHandle = 2;
var
argc : longint;
argv : ppchar;
envp : ppchar;
Implementation
{$I system.inc}
{$ifdef crtlib}
Procedure _rtl_exit(l: longint); cdecl;
Function _rtl_paramcount: longint; cdecl;
Procedure _rtl_paramstr(st: pchar; l: longint); cdecl;
Function _rtl_open(f: pchar; flags: longint): longint; cdecl;
Procedure _rtl_close(h: longint); cdecl;
Procedure _rtl_write(h: longint; addr: longInt; len : longint); cdecl;
Procedure _rtl_erase(p: pchar); cdecl;
Procedure _rtl_rename(p1: pchar; p2 : pchar); cdecl;
Function _rtl_read(h: longInt; addr: longInt; len : longint) : longint; cdecl;
Function _rtl_filepos(Handle: longint): longint; cdecl;
Procedure _rtl_seek(Handle: longint; pos:longint); cdecl;
Function _rtl_filesize(Handle:longint): longInt; cdecl;
Procedure _rtl_rmdir(buffer: pchar); cdecl;
Procedure _rtl_mkdir(buffer: pchar); cdecl;
Procedure _rtl_chdir(buffer: pchar); cdecl;
{$else}
{ used in syscall to report errors.}
var
Errno : longint;
{ Include constant and type definitions }
{$i errno.inc } { Error numbers }
{$i sysnr.inc } { System call numbers }
{$i sysconst.inc } { Miscellaneous constants }
{$i systypes.inc } { Types needed for system calls }
{ Read actual system call definitions. }
{$i syscalls.inc }
{$endif}
{*****************************************************************************
Misc. System Dependent Functions
*****************************************************************************}
procedure prthaltproc;external name '_haltproc';
procedure System_exit;
begin
{$ifdef i386}
asm
jmp prthaltproc
end;
{$else}
asm
jmp prthaltproc
end;
{$endif}
End;
Function ParamCount: Longint;
Begin
Paramcount:=argc-1
End;
Function ParamStr(l: Longint): String;
var
link,
hs : string;
i : longint;
begin
if l=0 then
begin
str(sys_getpid,hs);
hs:='/proc/'+hs+'/exe'#0;
i:=Sys_readlink(@hs[1],@link[1],high(link));
if i>0 then
begin
link[0]:=chr(i);
paramstr:=link;
end
else
paramstr:=strpas(argv[0]);
end
else
if (l>0) and (l<argc) then
paramstr:=strpas(argv[l])
else
paramstr:='';
end;
Procedure Randomize;
Begin
randseed:=sys_time;
End;
{*****************************************************************************
Heap Management
*****************************************************************************}
var
_HEAP : longint;external name 'HEAP';
_HEAPSIZE : longint;external name 'HEAPSIZE';
function getheapstart:pointer;assembler;
{$ifdef i386}
asm
leal _HEAP,%eax
end ['EAX'];
{$else}
asm
lea.l _HEAP,a0
move.l a0,d0
end;
{$endif}
function getheapsize:longint;assembler;
{$ifdef i386}
asm
movl _HEAPSIZE,%eax
end ['EAX'];
{$else}
asm
move.l _HEAPSIZE,d0
end ['D0'];
{$endif}
Function sbrk(size : longint) : Longint;
type
tmmapargs=packed record
address : longint;
size : longint;
prot : longint;
flags : longint;
fd : longint;
offset : longint;
end;
var
t : syscallregs;
mmapargs : tmmapargs;
begin
mmapargs.address:=0;
mmapargs.size:=Size;
mmapargs.prot:=3;
mmapargs.flags:=$22;
mmapargs.fd:=-1;
mmapargs.offset:=0;
t.reg2:=longint(@mmapargs);
Sbrk:=syscall(syscall_nr_mmap,t);
if ErrNo<>0 then
Sbrk:=0;
end;
{ include standard heap management }
{$I heap.inc}
{*****************************************************************************
Low Level File Routines
*****************************************************************************}
{
The lowlevel file functions should take care of setting the InOutRes to the
correct value if an error has occured, else leave it untouched
}
Procedure Errno2Inoutres;
{
Convert ErrNo error to the correct Inoutres value
}
begin
if ErrNo=0 then { Else it will go through all the cases }
exit;
case ErrNo of
Sys_ENFILE,
Sys_EMFILE : Inoutres:=4;
Sys_ENOENT : Inoutres:=2;
Sys_EBADF : Inoutres:=6;
Sys_ENOMEM,
Sys_EFAULT : Inoutres:=217;
Sys_EINVAL : Inoutres:=218;
Sys_EPIPE,
Sys_EINTR,
Sys_EIO,
Sys_EAGAIN,
Sys_ENOSPC : Inoutres:=101;
Sys_ENAMETOOLONG,
Sys_ELOOP,
Sys_ENOTDIR : Inoutres:=3;
Sys_EROFS,
Sys_EEXIST,
Sys_EACCES : Inoutres:=5;
Sys_ETXTBSY : Inoutres:=162;
end;
end;
Procedure Do_Close(Handle:Longint);
Begin
{$ifdef crtlib}
_rtl_close(Handle);
{$else}
sys_close(Handle);
{$endif}
End;
Procedure Do_Erase(p:pchar);
Begin
{$ifdef crtlib}
_rtl_erase(p);
{$else}
sys_unlink(p);
Errno2Inoutres;
{$endif}
End;
Procedure Do_Rename(p1,p2:pchar);
Begin
{$ifdef crtlib}
_rtl_rename(p1,p2);
{$else }
sys_rename(p1,p2);
Errno2Inoutres;
{$endif}
End;
Function Do_Write(Handle,Addr,Len:Longint):longint;
Begin
{$ifdef crtlib}
_rtl_write(Handle,addr,len);
Do_Write:=Len;
{$else}
Do_Write:=sys_write(Handle,pchar(addr),len);
Errno2Inoutres;
{$endif}
if Do_Write<0 then
Do_Write:=0;
End;
Function Do_Read(Handle,Addr,Len:Longint):Longint;
Begin
{$ifdef crtlib}
Do_Read:=_rtl_read(Handle,addr,len);
{$else}
Do_Read:=sys_read(Handle,pchar(addr),len);
Errno2Inoutres;
{$endif}
if Do_Read<0 then
Do_Read:=0;
End;
Function Do_FilePos(Handle: Longint): Longint;
Begin
{$ifdef crtlib}
Do_FilePos:=_rtl_filepos(Handle);
{$else}
Do_FilePos:=sys_lseek(Handle, 0, Seek_Cur);
Errno2Inoutres;
{$endif}
End;
Procedure Do_Seek(Handle,Pos:Longint);
Begin
{$ifdef crtlib}
_rtl_seek(Handle, Pos);
{$else}
sys_lseek(Handle, pos, Seek_set);
{$endif}
End;
Function Do_SeekEnd(Handle:Longint): Longint;
begin
{$ifdef crtlib}
Do_SeekEnd:=_rtl_filesize(Handle);
{$else}
Do_SeekEnd:=sys_lseek(Handle,0,Seek_End);
{$endif}
end;
Function Do_FileSize(Handle:Longint): Longint;
{$ifndef crtlib}
var
regs : Syscallregs;
Info : Stat;
{$endif}
Begin
{$ifdef crtlib}
Do_FileSize:=_rtl_filesize(Handle);
{$else}
regs.reg2:=Handle;
regs.reg3:=longint(@Info);
if SysCall(SysCall_nr_fstat,regs)=0 then
Do_FileSize:=Info.Size
else
Do_FileSize:=0;
Errno2Inoutres;
{$endif}
End;
Procedure Do_Truncate(Handle,Pos:longint);
{$ifndef crtlib}
var
sr : syscallregs;
{$endif}
begin
{$ifndef crtlib}
sr.reg2:=Handle;
sr.reg3:=Pos;
syscall(syscall_nr_ftruncate,sr);
Errno2Inoutres;
{$endif}
end;
Procedure Do_Open(var f;p:pchar;flags:longint);
{
FileRec and textrec have both Handle and mode as the first items so
they could use the same routine for opening/creating.
when (flags and $100) the file will be append
when (flags and $1000) the file will be truncate/rewritten
when (flags and $10000) there is no check for close (needed for textfiles)
}
var
{$ifndef crtlib}
oflags : longint;
{$endif}
Begin
{ close first if opened }
if ((flags and $10000)=0) then
begin
case FileRec(f).mode of
fminput,fmoutput,fminout : Do_Close(FileRec(f).Handle);
fmclosed : ;
else
begin
inoutres:=102; {not assigned}
exit;
end;
end;
end;
{ reset file Handle }
FileRec(f).Handle:=UnusedHandle;
{ We do the conversion of filemodes here, concentrated on 1 place }
case (flags and 3) of
0 : begin
oflags :=Open_RDONLY;
FileRec(f).mode:=fminput;
end;
1 : begin
oflags :=Open_WRONLY;
FileRec(f).mode:=fmoutput;
end;
2 : begin
oflags :=Open_RDWR;
FileRec(f).mode:=fminout;
end;
end;
if (flags and $1000)=$1000 then
oflags:=oflags or (Open_CREAT or Open_TRUNC)
else
if (flags and $100)=$100 then
oflags:=oflags or (Open_APPEND);
{ empty name is special }
if p[0]=#0 then
begin
case FileRec(f).mode of
fminput :
FileRec(f).Handle:=StdInputHandle;
fminout, { this is set by rewrite }
fmoutput :
FileRec(f).Handle:=StdOutputHandle;
fmappend :
begin
FileRec(f).Handle:=StdOutputHandle;
FileRec(f).mode:=fmoutput; {fool fmappend}
end;
end;
exit;
end;
{ real open call }
{$ifdef crtlib}
FileRec(f).Handle:=_rtl_open(p, oflags);
if FileRec(f).Handle<0 then
InOutRes:=2
else
InOutRes:=0;
{$else}
FileRec(f).Handle:=sys_open(p,oflags,438);
if (ErrNo=Sys_EROFS) and ((OFlags and Open_RDWR)<>0) then
begin
Oflags:=Oflags and not(Open_RDWR);
FileRec(f).Handle:=sys_open(p,oflags,438);
end;
Errno2Inoutres;
{$endif}
End;
Function Do_IsDevice(Handle:Longint):boolean;
{
Interface to Unix ioctl call.
Performs various operations on the filedescriptor Handle.
Ndx describes the operation to perform.
Data points to data needed for the Ndx function. The structure of this
data is function-dependent.
}
var
sr: SysCallRegs;
Data : array[0..255] of byte; {Large enough for termios info}
begin
sr.reg2:=Handle;
sr.reg3:=$5401; {=TCGETS}
sr.reg4:=Longint(@Data);
Do_IsDevice:=(SysCall(Syscall_nr_ioctl,sr)=0);
end;
{*****************************************************************************
UnTyped File Handling
*****************************************************************************}
{$i file.inc}
{*****************************************************************************
Typed File Handling
*****************************************************************************}
{$i typefile.inc}
{*****************************************************************************
Text File Handling
*****************************************************************************}
{$DEFINE SHORT_LINEBREAK}
{$DEFINE EXTENDED_EOF}
{$i text.inc}
{*****************************************************************************
Directory Handling
*****************************************************************************}
Procedure MkDir(Const s: String);[IOCheck];
Var
Buffer: Array[0..255] of Char;
Begin
If InOutRes <> 0 then exit;
Move(s[1], Buffer, Length(s));
Buffer[Length(s)] := #0;
{$ifdef crtlib}
_rtl_mkdir(@buffer);
{$else}
sys_mkdir(@buffer, 511);
Errno2Inoutres;
{$endif}
End;
Procedure RmDir(Const s: String);[IOCheck];
Var
Buffer: Array[0..255] of Char;
Begin
If InOutRes <> 0 then exit;
Move(s[1], Buffer, Length(s));
Buffer[Length(s)] := #0;
{$ifdef crtlib}
_rtl_rmdir(@buffer);
{$else}
sys_rmdir(@buffer);
Errno2Inoutres;
{$endif}
End;
Procedure ChDir(Const s: String);[IOCheck];
Var
Buffer: Array[0..255] of Char;
Begin
If InOutRes <> 0 then exit;
Move(s[1], Buffer, Length(s));
Buffer[Length(s)] := #0;
{$ifdef crtlib}
_rtl_chdir(@buffer);
{$else}
sys_chdir(@buffer);
Errno2Inoutres;
{$endif}
End;
procedure getdir(drivenr : byte;var dir : shortstring);
{$ifndef crtlib}
var
thisdir : stat;
rootino,
thisino,
dotdotino : longint;
rootdev,
thisdev,
dotdotdev : word;
thedir,dummy : string[255];
dirstream : pdir;
d : pdirent;
mountpoint : boolean;
predot : string[255];
{$endif}
begin
drivenr:=0;
dir:='';
{$ifndef crtlib}
thedir:='/'#0;
if sys_stat(@thedir[1],thisdir)<0 then
exit;
rootino:=thisdir.ino;
rootdev:=thisdir.dev;
thedir:='.'#0;
if sys_stat(@thedir[1],thisdir)<0 then
exit;
thisino:=thisdir.ino;
thisdev:=thisdir.dev;
{ Now we can uniquely identify the current and root dir }
thedir:='';
predot:='';
while not ((thisino=rootino) and (thisdev=rootdev)) do
begin
{ Are we on a mount point ? }
dummy:=predot+'..'#0;
if sys_stat(@dummy[1],thisdir)<0 then
exit;
dotdotino:=thisdir.ino;
dotdotdev:=thisdir.dev;
mountpoint:=(thisdev<>dotdotdev);
{ Now, Try to find the name of this dir in the previous one }
dirstream:=opendir (@dummy[1]);
if dirstream=nil then
exit;
repeat
d:=sys_readdir (dirstream);
if (d<>nil) and
(not ((d^.name[0]='.') and ((d^.name[1]=#0) or ((d^.name[1]='.') and (d^.name[2]=#0))))) and
(mountpoint or (d^.ino=thisino)) then
begin
dummy:=predot+'../'+strpas(@(d^.name[0]))+#0;
if sys_stat (@(dummy[1]),thisdir)<0 then
d:=nil;
end;
until (d=nil) or ((thisdir.dev=thisdev) and (thisdir.ino=thisino) );
if (closedir(dirstream)<0) or (d=nil) then
exit;
{ At this point, d.name contains the name of the current dir}
thedir:='/'+strpas(@(d^.name[0]))+thedir;
thisdev:=dotdotdev;
thisino:=dotdotino;
predot:=predot+'../';
end;
{ Now rootino=thisino and rootdev=thisdev so we've reached / }
dir:=thedir
{$endif}
end;
{*****************************************************************************
SystemUnit Initialization
*****************************************************************************}
Procedure SignalToRunError(Sig:longint);
begin
case sig of
8 : HandleError(200);
11 : HandleError(216);
end;
end;
Procedure InstallSignals;
var
sr : syscallregs;
begin
sr.reg3:=longint(@SignalToRunError);
{ sigsegv }
sr.reg2:=11;
syscall(syscall_nr_signal,sr);
{ sigfpe }
sr.reg2:=8;
syscall(syscall_nr_signal,sr);
end;
procedure SetupCmdLine;
var
bufsize,
len,j,
size,i : longint;
found : boolean;
buf : array[0..1026] of char;
procedure AddBuf;
begin
reallocmem(cmdline,size+bufsize);
move(buf,cmdline[size],bufsize);
inc(size,bufsize);
bufsize:=0;
end;
begin
size:=0;
bufsize:=0;
i:=0;
while (i<argc) do
begin
len:=strlen(argv[i]);
if len>sizeof(buf)-2 then
len:=sizeof(buf)-2;
found:=false;
for j:=1 to len do
if argv[i][j]=' ' then
begin
found:=true;
break;
end;
if bufsize+len>=sizeof(buf)-2 then
AddBuf;
if found then
begin
buf[bufsize]:='"';
inc(bufsize);
end;
move(argv[i]^,buf[bufsize],len);
inc(bufsize,len);
if found then
begin
buf[bufsize]:='"';
inc(bufsize);
end;
if i<argc then
buf[bufsize]:=' '
else
buf[bufsize]:=#0;
inc(bufsize);
inc(i);
end;
AddBuf;
end;
Begin
{ Set up signals handlers }
InstallSignals;
{ Setup heap }
InitHeap;
InitExceptions;
{ Arguments }
SetupCmdLine;
{ Setup stdin, stdout and stderr }
OpenStdIO(Input,fmInput,StdInputHandle);
OpenStdIO(Output,fmOutput,StdOutputHandle);
OpenStdIO(StdOut,fmOutput,StdOutputHandle);
OpenStdIO(StdErr,fmOutput,StdErrorHandle);
{ Reset IO Error }
InOutRes:=0;
End.
{
$Log$
Revision 1.38 2000-03-23 15:24:18 peter
* remove handle check for do_close
Revision 1.37 2000/02/09 16:59:32 peter
* truncated log
Revision 1.36 2000/02/09 12:17:51 peter
* moved halt to system.inc
* syslinux doesn't use direct asm anymore
Revision 1.35 2000/02/08 11:47:09 peter
* paramstr(0) support
Revision 1.34 2000/01/20 23:38:02 peter
* support fm_inout as stdoutput for assign(f,'');rewrite(f,1); becuase
rewrite opens always with filemode 2
Revision 1.33 2000/01/16 22:25:38 peter
* check handle for file closing
Revision 1.32 2000/01/07 16:41:41 daniel
* copyright 2000
Revision 1.31 2000/01/07 16:32:28 daniel
* copyright 2000 added
Revision 1.30 1999/12/01 22:57:31 peter
* cmdline support
Revision 1.29 1999/11/06 14:39:12 peter
* truncated log
Revision 1.28 1999/10/28 09:50:06 peter
* use mmap instead of brk
Revision 1.27 1999/09/10 15:40:35 peter
* fixed do_open flags to be > $100, becuase filemode can be upto 255
Revision 1.26 1999/09/08 16:14:43 peter
* pointer fixes
Revision 1.25 1999/07/28 23:18:36 peter
* closedir fixes, which now disposes the pdir itself
}
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