SUMMARY The first attempt to save a PGP encrypted .kmy file results in an error. Second attempt works as expected. STEPS TO REPRODUCE 1. Open PGP encrypted .kmy file from network share (cifs). 2. Save file. OBSERVED RESULT Error message is thrown: "Failure while writing to 'XYZ.kmy' /kmymoney_git/kmymoney/kmymoney/plugins/xml/xmlstorage.cpp:552" EXPECTED RESULT File should be saved without error. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Ubuntu 20.04.1 LTS (available in About System) KDE Plasma Version: KDE Frameworks Version: 5.68.0 Qt Version: 5.12.8 ADDITIONAL INFORMATION
Any news here? Can I provide more information?
If you run KMM from command line, is there any more useful info output to the console? My suspicion is a problem not in KMM itself, but in one of the underlying KDE IO routines. Failing once, and then succeeding on a second try make me think of a timing issue. Do you get the same issue saving to a local file? Do you have any network shares other that cifs to test? Also, do you have the same error if the file is NOT pgp encrypted? You should be able to test with a newly created .kmy file, so you don't need to have unencrypted copies of your own data around.
Changing status
Running from command line the following messages are shown: 1st attempt so save (error) --- GPG search "$HOME/.gnupg/secring.gpg" Found GPG Home directory $HOME/.gnupg GPG filename /usr/bin/gpg GPG search "$HOME/.gnupg/secring.gpg" Found GPG Home directory $HOME/.gnupg GPG filename /usr/bin/gpg QFileDevice::flush: No file engine. Is IODevice open? Unable to write changes to: $NETWORKSHARE/testfile.kmy Reason: Failure while writing to '$NETWORKSHARE/testfile.kmy' $GIT/kmymoney/kmymoney/plugins/xml/xmlstorage.cpp:552 2nd attempt to save (successful) --- GPG search "$HOME/.gnupg/secring.gpg" Found GPG Home directory $HOME/.gnupg GPG filename /usr/bin/gpg GPG search "$HOME/.gnupg/secring.gpg" Found GPG Home directory $HOME/.gnupg GPG filename /usr/bin/gpg QFileDevice::flush: No file engine. Is IODevice open? Even for the successful attempt the error/warning "QFileDevice::flush: No file engine. Is IODevice open?" is shown. There is no error with: - unencrypted file on network share - local unencrypted file - local encrypted file
The QFileDevice::flush is a warning, not an error, and my guess (which may be completely wrong) is that it is called when KMM closes the temporary output file it writes, before trying to copy it over the original. Is the $NETWORKSHARE literally what the error says, or did you substitute to not show your actual share name? I don't know if it matters, but I'm wondering if on the first write attempt, the share is not mapped, so the write fails, but that write attempt causes the share to get mapped, so it works on a retry. Question for the developers: looking at xmlstorage.cpp the comment above line 552 says QFile::rename will fail, but line 551 is "if (!QFile::remove(localFile) || !QFile::copy(writeFile, localFile))". Should that remove be rename? I don't see why the remove would fail, the first OR second try, so I'm confused either way.
Git commit 4d16fb2d1dab0a833425715091a909795d065466 by Thomas Baumgart. Committed on 30/11/2020 at 11:39. Pushed by tbaumgart into branch '5.1'. Differentiate errors while writing data file This is to get a bit more information about the cause of a failure during a file save operation. M +6 -2 kmymoney/plugins/xml/xmlstorage.cpp https://invent.kde.org/office/kmymoney/commit/4d16fb2d1dab0a833425715091a909795d065466
Git commit bbf1b4a9e35e4e93b8b5ff6816e05fa347d0cfd3 by Thomas Baumgart. Committed on 06/12/2020 at 11:12. Pushed by tbaumgart into branch 'master'. Differentiate errors while writing data file This is to get a bit more information about the cause of a failure during a file save operation. (cherry picked from commit 4d16fb2d1dab0a833425715091a909795d065466) M +6 -2 kmymoney/plugins/xml/xmlstorage.cpp https://invent.kde.org/office/kmymoney/commit/bbf1b4a9e35e4e93b8b5ff6816e05fa347d0cfd3
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As supposed $NETWORKSHARE is a substitution to not show my actual share name. I don't think it is a problem with the mapping of a share because there is always a second try required. E.g. 1) Save attempt --> error 2) Save attempt OK 3) Quickly change something for a second or two 4) Save attempt --> error 5) Save attempt OK With 5.1.1 the behaviour stays the same, but the message changed to: "Failure while copying 'XYZ.kmy.wiTsQc' to 'XYZ.kmy' /kmymoney_git/kmymoney/kmymoney/plugins/xml/xmlstorage.cpp:555"
Thanks for the feedback. Now we see a bit better what is going on. KMyMoney at this stage removes the file 'XYZ.kmy' and then copies the temporary file to this location. For whatever reason, erasing the file works, but copying fails. The code can be found at https://invent.kde.org/office/kmymoney/-/blob/master/kmymoney/plugins/xml/xmlstorage.cpp#L539 The second time around, it does not use a temporary file but the real file right away and does not need to do the remove/copy magic because the file does not exist (anymore - was deleted in the first round). So I don't think it is a timing issue either. Looking at the code, I think it is not related to the encryption but should also happen with a regular file. @TobIs: Can you try this without encryption but using the same network environment?
Also with 5.1.1 there is no error with an unencrypted file within the same network folder. I recently checked the output on the command line. Despite the line "Reason: Failure while copying '$NETWORKSHARE/test_encrypt.kmy.JNpouf' to '$NETWORKSHARE/test_encrypt.kmy' $GIT/kmymoney/kmymoney/plugins/xml/xmlstorage.cpp:555" it is the same as in comment 4.
Git commit 517f451e58ab5bd93d9590e4ce3c10a118f477ad by Thomas Baumgart. Committed on 02/01/2021 at 15:26. Pushed by tbaumgart into branch '5.1'. Remove GPG context before accessing the file again M +7 -0 kmymoney/plugins/xml/xmlstorage.cpp https://invent.kde.org/office/kmymoney/commit/517f451e58ab5bd93d9590e4ce3c10a118f477ad
@TobIs: can you try to run the version which will be created on the (European) morning of Jan 3rd (#881+) on https://binary-factory.kde.org/job/KMyMoney_Release_win64/ and see if that makes a difference? It should contain the change I just pushed with comment 12.
Thank you for looking into this issue and providing a patched binary. But I'm using Kmymoney with Ubuntu, so I patched the xmlstorage.cpp by hand and compiled Kmymoney 5.1.1. Unfortunately this didn't solve the problem. The faulty behavior stays the same.
I'm not sure why Thomas might have thought you were on Windows, but see https://binary-factory.kde.org/job/KMyMoney_Nightly_Appimage_Build/ for the appimage build for linux, which you can just download, make executable, and run, no compiling needed. I'm resetting the status based on your response