No. The "" is a shell/cmdline convention, and API calls are generally not
shell.
Thank you Marco for the clarification.
Sandro Cumerlato
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In our previous episode, Sandro Cumerlato said:
> ' delimiters are mandatory within this example because we are writing paths
> as string parameters directly into the source code.
>
> I believe that I should use both ' and " in case of spaces within paths:
>
> CopyFile('"c:\my silly path\autoexec
On 23 Mar 2017 11:34, "James Richters"
wrote:
Thanks for the response, it got me on the right track and I got it working.
Happy to help you!
I originally did try “ instead of ‘ and have the same results. I was using
‘ because of the example here: http://wiki.freepascal.org/CopyFile
> C
Subject: Re: [fpc-pascal] FreePascal Windows - Force files to write to disk
Try " char instead of ' (char 39). I never use ' under Windows.
Best regards
Sandro Cumerlato
On 22 Mar 2017 23:47, "James Richters" mailto:ja...@productionautomation.net>
Try " char instead of ' (char 39). I never use ' under Windows.
Best regards
Sandro Cumerlato
On 22 Mar 2017 23:47, "James Richters"
wrote:
> I'm trying to use copyfile and cannot get it to work, anyone have any
> ideas?
>
> I'm using the procedure below. My writeln showing the contents
I'm trying to use copyfile and cannot get it to work, anyone have any ideas?
I'm using the procedure below. My writeln showing the contents of the
variables seems to indicate they are correct. The souce file does exist and is
correct, the destination file does not exitst.
I get an error 50 wh
Am 21.03.2017 um 19:58 schrieb James Richters:
Does anyone know of a way to force critical data to be written to a SSD so it's
not lost during a power failure?
Here is a unix-like sync command for windows:
https://technet.microsoft.com/sv-se/sysinternals/bb897438(en-us).aspx
__
El 22/03/2017 a las 19:17, James Richters escribió:
Copy the file to the hard drive with a temporary name
Flush all writes to above file
Delete previous backup file
Rename the original file to backup file name
Rename the new recently copied file to the original name
Hello,
Your problem seems
] On Behalf Of
Karoly Balogh (Charlie/SGR)
Sent: Wednesday, March 22, 2017 9:13 AM
To: FPC-Pascal users discussions
Subject: Re: [fpc-pascal] FreePascal Windows - Force files to write to disk
Hi,
On Wed, 22 Mar 2017, Karoly Balogh (Charlie/SGR) wrote:
> However, please note that transactio
Il 22/03/2017 14:21, Karoly Balogh (Charlie/SGR) ha scritto:
Hi,
On Wed, 22 Mar 2017, Giuliano Colla wrote:
Il 22/03/2017 13:20, James Richters ha scritto:
No, it is not only freepascal, but not every program either.
A wild guess. The vilain could be the journal logic.
Wild indeed. :)
You
On Wed, Mar 22, 2017 at 01:50:45PM +0100, Karoly Balogh (Charlie/SGR) wrote:
> The usual way to work this problem around on Linux systems at least, is to
> write a new file, then do an overwriting rename to the old file name.
> There rename is an "atomic" operation, which will be either committed t
Hi,
On Wed, 22 Mar 2017, Giuliano Colla wrote:
> Il 22/03/2017 13:20, James Richters ha scritto:
> > No, it is not only freepascal, but not every program either.
>
> A wild guess. The vilain could be the journal logic.
Wild indeed. :)
> You might try overwriting the old file instead of clearing
Hi,
On Wed, 22 Mar 2017, Karoly Balogh (Charlie/SGR) wrote:
> However, please note that transactional file handling on power loss is a
> quite delicate scenario, so you might not be able to solve all the related
> problems with this - what happens exactly when you get a power loss during
> a writ
Il 22/03/2017 13:20, James Richters ha scritto:
No, it is not only freepascal, but not every program either.
A wild guess. The vilain could be the journal logic.
The journal tells that the write operation has not been completed at
power off, and restores the last valid version of the file, wh
Hi,
On Wed, 22 Mar 2017, James Richters wrote:
> No, it is not only freepascal, but not every program either.
I'm no Windows expert, but Windows API seems to have a way do to this
directly. CreateFile() API seems to have a flag, which has a value
FILE_FLAG_WRITE_THROUGH, which will cause the fil
c-pascal-boun...@lists.freepascal.org] On Behalf Of
Santiago A.
Sent: Wednesday, March 22, 2017 4:40 AM
To: FPC-Pascal users discussions
Subject: Re: [fpc-pascal] FreePascal Windows - Force files to write to disk
El 21/03/2017 a las 15:39, James Richters escribió:
> I should note that these systems are all using
El 21/03/2017 a las 15:39, James Richters escribió:
> I should note that these systems are all using Samsung SSDs in them, perhaps
> there is some SSD weirdness going on?
Yes, I think so. SSD is special.
The SSD technology like any flash memories have a limited number of
rewrites, so there are st
On Tue, Mar 21, 2017 at 06:01:17PM -0700, Ralf Quint wrote:
> On 3/21/2017 11:58 AM, James Richters wrote:
> >I have not tried FlushFileBuffers() yet, so I just tried it now, I am
> >getting the same results.
> Well, that is expected, as the issue has nothing to do with your program,
> it's the c
On 3/21/2017 11:58 AM, James Richters wrote:
I have not tried FlushFileBuffers() yet, so I just tried it now, I am getting
the same results.
Well, that is expected, as the issue has nothing to do with your
program, it's the caching of the operating system that is responsible
for the actual ph
On 21 Mar 2017 18:59, "James Richters"
wrote:
I have not tried FlushFileBuffers() yet, so I just tried it now, I am
getting the same results. I have also tried disabling write caching in
disk management and STILL have the same results. I am now thinking this
is some caching being done on the
On 21/03/17 20:48, Marco van de Voort wrote:
He closes the file. That should sync.
Not necessarily. On Unix there is also a difference between closing a
file and calling fsync() on it. And even then there are sometimes
additional things you may have to do to survive sudden power loss, such
a
In our previous episode, Henry Vermaak said:
> > Writeln file
> > Writeln file ...
> > Flush file
>
> Have you tried using the FlushFileBuffers() Windows API? Something like
> this:
>
> FlushFileBuffers(TextRec(AFile).Handle);
>
> Add "windows" to the uses clause, obviously.
He closes the file
Original Message-
From: fpc-pascal [mailto:fpc-pascal-boun...@lists.freepascal.org] On Behalf Of
Henry Vermaak
Sent: Tuesday, March 21, 2017 11:08 AM
To: FPC-Pascal users discussions
Subject: Re: [fpc-pascal] FreePascal Windows - Force files to write to disk
On Tue, Mar 21, 2017 at 10:39:23
On 21/03/17 15:39, James Richters wrote:
If I then power off the test computer (not doing a correct windows shutdown,
this simulates an unattended power failure) when it boots back up, my file
has the correct date and time and the correct length, hovever the contents
of the file is a string of $0
On Tue, Mar 21, 2017 at 10:39:23AM -0400, James Richters wrote:
> I am still having this issue. I've managed to narrow down what is happening
> some. The problem is my data is not actually being written all the way to
> disk. I now have a repeatable proven method to reproduce the issue. Here
age-
From: fpc-pascal-boun...@lists.freepascal.org
[mailto:fpc-pascal-boun...@lists.freepascal.org] On Behalf Of James Richters
Sent: Friday, February 24, 2017 1:53 PM
To: 'FPC-Pascal users discussions'
Subject: Re: [fpc-pascal] FreePascal Windows - Force files to write to disk
Thanks fo
ascal-boun...@lists.freepascal.org
[mailto:fpc-pascal-boun...@lists.freepascal.org] On Behalf Of Klaus Hartnegg
Sent: Thursday, February 23, 2017 6:33 AM
To: fpc-pascal@lists.freepascal.org
Subject: Re: [fpc-pascal] FreePascal Windows - Force files to write to disk
Am 21.02.2017 um 22:12 schrieb Jame
Am 22.02.2017 um 21:27 schrieb James Richters:
Here is the procedure that reads the file.
Also you could always try to immediately read the file each time it has
been modified. Append a log entry to some other file, telling that the
pax file was modified and whether it was still correct. This
Am 21.02.2017 um 22:12 schrieb James Richters:
Assign(BitFile,'BitSave.pax');
{$I-}
ReWrite(BitFile);
if ioresult <> 0 then
writeln ('error opening pax file');
WriteLn(BitFile,XADJ:1:8);
WriteLn(BitFile,YADJ:1:8);
WriteLn(BitFile,ZADJ:1:8);
WriteLn(BitFile,WADJ:1:8);
WriteL
On 22/02/17 21:00, James Richters wrote:
I suppose a virus scanner could access it, I didn't think of that. I guess
I should have said no other program intentionally access the file. It's
just a way for me to store some variables and get them back, it serves no
other purpose.
A virus scanne
ascal-boun...@lists.freepascal.org
[mailto:fpc-pascal-boun...@lists.freepascal.org] On Behalf Of Jonas Maebe
Sent: Wednesday, February 22, 2017 3:47 PM
To: FPC-Pascal users discussions
Subject: Re: [fpc-pascal] FreePascal Windows - Force files to write to disk
On 22/02/17 13:17, James Richters wrote:
On 22/02/17 13:17, James Richters wrote:
No other programs on the system ever access this file
Not even virus scanners?
Jonas
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, 2017 11:07 AM
To: FPC-Pascal users discussions
Subject: Re: [fpc-pascal] FreePascal Windows - Force files to write to disk
El 22/02/2017 a las 13:17, James Richters escribió:
The error I get is when trying to open the file to read it. It’s something
like read past end of file, because the c
El 22/02/2017 a las 13:17, James Richters escribió:
> The error I get is when trying to open the file to read it. It’s
> something like read past end of file, because the corrupted file is
> just one long line, once I read that, the second read is past the end
> of file. I can do checking to get
Am 22.02.2017 13:12 schrieb "Jürgen Hestermann" :
> Also, I am not sure whether "Close" is equivalent to "CloseFile" and
"Assign" is equivalent to "AssignFile".
> I remenber that I had some issues using the old (TP7) notations but I am
don't remember the details.
They are the same. The ones withou
On 21/02/17 21:12, James Richters wrote:
> My understanding was the Close(file); would save the file all the way to
> disk and flush any buffers that were holding it,
I would try adding a Flush(File) before the Close, even though that
should not really be needed.
___
Subject: Re: [fpc-pascal] FreePascal Windows - Force files to write to disk
El 21/02/2017 a las 22:12, James Richters escribió:
Thanks for any advice on this
My first action would be to guarantee that the file is closed with a
try...finally.
AssignFile(BitFile,'BitSave.pax');
Am 2017-02-21 um 22:12 schrieb James Richters:
> I have a freepascal Windows console application that I recently ported over
from DOS Turbo Pascal. I am have a small settings file that I write to disk that
keeps getting corrupted. It happens only occasionally, but it’s always this one
file,
El 21/02/2017 a las 22:12, James Richters escribió:
>
>
>
> Thanks for any advice on this
>
My first action would be to guarantee that the file is closed with a
try...finally.
AssignFile(BitFile,'BitSave.pax');
ReWrite(BitFile);
try
finally
CloseFile(BitFile);
end;
Second:
Do yo
James Richters wrote:
> I have a freepascal Windows console application that I recently ported
> over from DOS Turbo Pascal. I am have a small settings file that I
> write to disk that keeps getting corrupted. It happens only
> occasionally, but it’s always this one file, no others.Do I need
On Tue, February 21, 2017 22:12, James Richters wrote:
Hello James,
> I have a freepascal Windows console application that I recently ported
> over from DOS Turbo Pascal. I am have a small settings file that I write
> to disk that keeps getting corrupted. It happens only occasionally, but
> i
I have a freepascal Windows console application that I recently ported over
from DOS Turbo Pascal. I am have a small settings file that I write to disk
that keeps getting corrupted. It happens only occasionally, but it’s always
this one file, no others.Do I need to do something specific t
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