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|
{$ifdef fpc}
{$mode objfpc}
{$h+}
{$endif}
uses
SysUtils;
{$ifndef fpc}
const
fmsharecompat = cardinal(0);
fsFromBeginning = cardinal(0);
{$endif}
var
l,l2: longint;
begin
try
try
l:=filecreate('tfile2.dat');
if (l<0) then
raise exception.create('unable to create file');
fileclose(l);
l:=fileopen('tfile2.dat',fmopenread);
if (filewrite(l,l,sizeof(l))>0) then
raise exception.create('writing to read-only file succeeded');
fileclose(l);
deletefile('tfile2.dat');
l:=filecreate('tfile2.dat');
if (l<0) then
raise exception.create('unable to create file (2)');
fileclose(l);
l:=fileopen('tfile2.dat',fmopenwrite);
if (filewrite(l,l,sizeof(l))<>sizeof(l)) then
raise exception.create('writing to write-only file failed');
if (fileseek(l,0,fsFromBeginning)<>0) then
raise exception.create('seeking write-only file failed');
if (fileread(l,l2,sizeof(l))>=0) then
raise exception.create('reading from write-only file succeeded');
fileclose(l);
l:=fileopen('tfile2.dat',fmopenread or fmShareDenyWrite);
if (l<0) then
raise exception.create('unable to open file in read-only mode and fmShareDenyWrite mode');
l2:=fileopen('tfile2.dat',fmopenread or fmShareDenyWrite);
if (l2 < 0) then
raise exception.create('opening two files as read-only with fmShareDenyWrite failed');
fileclose(l2);
l2:=fileopen('tfile2.dat',fmopenread or fmShareExclusive);
if (l2 >= 0) then
begin
fileclose(l2);
raise exception.create('opening file first as read-only with fmShareDenyWrite, and then again as fmopenread with fmShareExclusive succeeded');
end;
fileclose(l);
l:=fileopen('tfile2.dat',fmopenwrite or fmShareExclusive);
if (l<0) then
raise exception.create('unable to open file in write-only and fmShareExclusive mode');
l2:=fileopen('tfile2.dat',fmopenwrite or fmShareExclusive);
if (l2 >= 0) then
begin
fileclose(l2);
raise exception.create('opening two files as write-only with fmShareExclusive succeeded');
end;
l2:=fileopen('tfile2.dat',fmopenwrite or fmShareDenyWrite);
if (l2 >= 0) then
begin
fileclose(l2);
raise exception.create('opening file first as write-only with fmShareExclusive, and then again as fmopenwrite with fmShareDenyWrite succeeded');
end;
fileclose(l);
l:=fileopen('tfile2.dat',fmopenread or fmShareExclusive);
if (l<0) then
raise exception.create('unable to open file in read-only and fmShareExclusive mode');
l2:=fileopen('tfile2.dat',fmopenread or fmShareExclusive);
if (l2 >= 0) then
begin
fileclose(l2);
raise exception.create('opening two files as read-only with fmShareExclusive succeeded');
end;
l2:=fileopen('tfile2.dat',fmopenread or fmShareDenyWrite);
if (l2 >= 0) then
begin
fileclose(l2);
raise exception.create('opening file first as read-only with fmShareExclusive, and then again as fmopenread with fmShareDenyWrite succeeded');
end;
fileclose(l);
l:=fileopen('tfile2.dat',fmopenread);
if (l<0) then
raise exception.create('unable to open file in read-only mode (2)');
l2:=fileopen('tfile2.dat',fmopenread);
if (l2 >= 0) then
begin
fileclose(l2);
raise exception.create('opening two files as read-only without sharing specified succeeded (should not, file is by default locked)');
end;
l2:=fileopen('tfile2.dat',fmopenread or fmShareDenyWrite);
if (l2 >= 0) then
begin
fileclose(l2);
raise exception.create('opening two files as read-only with fmShareDenyWrite succeeded (should not, file is by default locked)');
end;
fileclose(l);
{ should be same as no locking specified }
l:=fileopen('tfile2.dat',fmopenread or fmShareCompat);
if (l<0) then
raise exception.create('unable to open file in read-only mode (3)');
l2:=fileopen('tfile2.dat',fmopenread or fmShareCompat);
if (l2 >= 0) then
begin
fileclose(l2);
raise exception.create('opening two files as read-only with fmShareCompat succeeded (should be locked)');
end;
l2:=fileopen('tfile2.dat',fmopenread or fmShareDenyWrite);
if (l2 >= 0) then
begin
fileclose(l2);
raise exception.create('opening file first as read-only fmShareCompat (should not have any effect), and then again as fmopenread with fmShareDenyWrite succeeded');
end;
fileclose(l);
l:=fileopen('tfile2.dat',fmopenread or fmShareDenyNone);
if (l<0) then
raise exception.create('unable to open file in read-only mode and fmShareDenyNone mode');
l2:=fileopen('tfile2.dat',fmopenread or fmShareDenyNone);
if (l2 < 0) then
raise exception.create('opening two files as read-only with fmShareDenyNone failed');
fileclose(l2);
l2:=fileopen('tfile2.dat',fmopenread or fmShareDenyWrite);
if (l2 < 0) then
raise exception.create('opening two files as read-only with fmShareDenyNone and then fmShareDenyWrite failed');
fileclose(l2);
{ on Windows, fmShareExclusive checks whether the file is already open in any way by the current
or another process. On Unix, that is not the case, and we also cannot check against a
fmShareDenyNone mode
}
{$ifndef unix}
l2:=fileopen('tfile2.dat',fmopenread or fmShareExclusive);
if (l2 >= 0) then
begin
fileclose(l2);
raise exception.create('opening two files as read-only with fmShareDenyNone and then fmShareExclusive succeeded');
end;
{$endif}
fileclose(l);
l:=fileopen('tfile2.dat',fmopenread or fmShareDenyWrite);
if (l<0) then
raise exception.create('unable to open file in read-only mode and fmShareDenyWrite mode (2)');
l2:=fileopen('tfile2.dat',fmopenread or fmShareDenyNone);
if (l2 < 0) then
raise exception.create('opening files as read-only with fmShareDenyWrite and then fmShareDenyNone failed');
fileclose(l2);
fileclose(l);
l:=fileopen('tfile2.dat',fmopenwrite or fmShareDenyNone);
if (l<0) then
raise exception.create('unable to open file in write-only mode and fmShareDenyNone mode');
l2:=fileopen('tfile2.dat',fmopenread or fmShareDenyNone);
if (l2 < 0) then
raise exception.create('opening two files as read/write-only with fmShareDenyNone failed');
fileclose(l2);
except
on e: exception do
begin
writeln(e.message);
exitcode:=1;
end;
end;
finally
if (l>=0) then
fileclose(l);
deletefile('tfile2.dat');
end;
end.
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