Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

No. The "" is a shell/cmdline convention, and API calls are generally not shell. Thank you Marco for the clarification. Sandro Cumerlato ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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:

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

<fpc-pascal@lists.freepascal.org> 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" <ja...@

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" wrote: > I'm trying to use copyfile and cannot get it to work, anyone have any > ideas? > > I'm using the procedure below.

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

] On Behalf Of Karoly Balogh (Charlie/SGR) Sent: Wednesday, March 22, 2017 9:13 AM To: FPC-Pascal users discussions <fpc-pascal@lists.freepascal.org> Subject: Re: [fpc-pascal] FreePascal Windows - Force files to write to disk Hi, On Wed, 22 Mar 2017, Karoly Balogh (Charlie/SGR) wrote: >

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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. :)

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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

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 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

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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,

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

c-pascal-boun...@lists.freepascal.org] On Behalf Of Santiago A. Sent: Wednesday, March 22, 2017 4:40 AM To: FPC-Pascal users discussions <fpc-pascal@lists.freepascal.org> Subject: Re: [fpc-pascal] FreePascal Windows - Force files to write to disk El 21/03/2017 a las 15:39, James Richters escrib

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 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

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

: 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 <fpc-pascal@lists.freepascal.org> Subject: Re: [fpc-pascal] FreePascal Windows - Force files to write to disk On Tue, Mar 21, 2017 at

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

...@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' <fpc-pascal@lists.freepascal.org> Subject: Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

...@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 James Richters

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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.

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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);

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

...@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 <fpc-pascal@lists.freepascal.org> Subject: Re: [fpc-pascal] FreePascal Windows - Force files to write to disk On 22/02/17

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

On 22/02/17 13:17, James Richters wrote: No other programs on the system ever access this file Not even virus scanners? Jonas ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

users discussions <fpc-pascal@lists.freepascal.org> 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, b

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 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

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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.

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

fpc-pascal@lists.freepascal.org> 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(B

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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,

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'); ReWrite(BitFile); try finally CloseFile(BitFile); end; Second: Do

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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

Re: [fpc-pascal] FreePascal Windows - Force files to write to disk

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 >

[fpc-pascal] FreePascal Windows - Force files to write to disk

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