[kbackup] [Bug 464712] KBackup archives cannot be restored. - tar files are corrupt
https://bugs.kde.org/show_bug.cgi?id=464712 Martin Koller changed: What|Removed |Added Latest Commit||https://invent.kde.org/util ||ities/kbackup/commit/92b35c ||f7f4fed327d68bfc1608878f872 ||3a679a9 Status|ASSIGNED|RESOLVED Resolution|--- |FIXED --- Comment #7 from Martin Koller --- Git commit 92b35cf7f4fed327d68bfc1608878f8723a679a9 by Martin Koller. Committed on 04/02/2023 at 23:02. Pushed by mkoller into branch 'master'. Switch from KTar to libarchive to allow archival of files > ca. 8GB M +118 -98 src/Archiver.cxx M +21 -23 src/Archiver.hxx M +3-0src/CMakeLists.txt https://invent.kde.org/utilities/kbackup/commit/92b35cf7f4fed327d68bfc1608878f8723a679a9 -- You are receiving this mail because: You are watching all bug changes.
[kbackup] [Bug 464712] KBackup archives cannot be restored. - tar files are corrupt
https://bugs.kde.org/show_bug.cgi?id=464712 --- Comment #6 from Paul Hands --- OK...I'll stop bothering you :-) I'm just trying to get a working backup solution that works well in KDE. LibArchive sounds like the right call. -- You are receiving this mail because: You are watching all bug changes.
[kbackup] [Bug 464712] KBackup archives cannot be restored. - tar files are corrupt
https://bugs.kde.org/show_bug.cgi?id=464712 --- Comment #5 from Martin Koller --- I don't want to go that route. It would also need double the space on your disk and is probably slow. I looked into the ark sources since I can open a tar file with 12GB when I created it on the command line. What I found is that they are not using KTar but the libArchive library, which can handle a lot of other archive formats as well (which I don't need in kbackup). It seems the simplest way is to also use this lib instead reimplemeting all this enhanced tar formats libarchive has already implemented. -- You are receiving this mail because: You are watching all bug changes.
[kbackup] [Bug 464712] KBackup archives cannot be restored. - tar files are corrupt
https://bugs.kde.org/show_bug.cgi?id=464712 --- Comment #4 from Paul Hands --- A thought. It's possible to use the "split" command to break a large file into pieces. That might be an option inside KBackup, instead of making changes to KTarespecially if you're not the maintainer. It could be that this a new option for KBackup - split files over a given size into chunks anyway? There would be a bit of extra work at restore time to reassemble the pieces (xaa, xab, xac...and so on) from the split operation...but KBackup doesn't do restore, so perhaps some scripting for Ark? -- You are receiving this mail because: You are watching all bug changes.
[kbackup] [Bug 464712] KBackup archives cannot be restored. - tar files are corrupt
https://bugs.kde.org/show_bug.cgi?id=464712 Martin Koller changed: What|Removed |Added Ever confirmed|0 |1 Status|REPORTED|ASSIGNED --- Comment #3 from Martin Koller --- Found the problem. It's a bug in the KTar implementation. The size of a file is stored inside the tar file header as an octal encoded string. strange, but obviously a very old format from the good old Unix days ;-) The string is limited to 11 chars, which means: the maximum file size is 8589934591 Bytes. Sadly KTar has no check for an overflow in our case and simply cuts the 12th character. In my testcase I have a file being ~12GB, which is 1228800 bytes, which should be encoded as the string "13343300", but KTar writes it as "1334330" leading to a size showing as 153600 bytes. In the short term this means I need to implement a check which limits the backup to files with the above max length and kbackup will cancel a backup when a too large file is found. -- You are receiving this mail because: You are watching all bug changes.
[kbackup] [Bug 464712] KBackup archives cannot be restored. - tar files are corrupt
https://bugs.kde.org/show_bug.cgi?id=464712 --- Comment #2 from Paul Hands --- I'm available for testing and can create screen capture videos as needed. -- You are receiving this mail because: You are watching all bug changes.
[kbackup] [Bug 464712] KBackup archives cannot be restored. - tar files are corrupt
https://bugs.kde.org/show_bug.cgi?id=464712 --- Comment #1 from Paul Hands --- Created attachment 155539 --> https://bugs.kde.org/attachment.cgi?id=155539=edit kbacup corruption message -- You are receiving this mail because: You are watching all bug changes.
