Cannot save file (EWriteError error) when owner is root, but owner of folder is user

[timur-g]

Not sure if this is possible in some way, coud not find. If a user has no permisison, it would be handy if file could be open, edited and saved in superuser mode. I have 2 examples: Notepad++ has plugin NppSaveAsAdmin (obviously in Windows), DoubleCommander (wonderful file manager, from another Alex) has Admin rights in Windows and Linux ("you need to provide admin permission to create/delete this object").

[Alexey-T]

Wiki tells that Cud can save modified files even to folders w/o permissions. https://wiki.freepascal.org/CudaText#Can_app_save_files_to_system_directories.3F For example, open some file from write-protected folder on Unix/Linux. CudaText detects file permissions, so it should open file in read-only mode. Then, from "Command Palette", call "toggle read-only mode". Then you can edit the file. Edit it and save it - CudaText will try to save it via "pkexec".

[timur-g]

That does not fully work, tested in Mint 21 which is Ubuntu 22.04.. For files that have no permission for user to read, I see Cannot open file- permisison denied. If there is read permission I can open the file and write, but I cannot save: EWriteError, Cannot save file: I do not see how "toggle read-only mode" helps, seems like the opposite of what I wanted, does not seem to help to write file when user should submit superuser credentials. DoubleCmd approach seems OK to me.

[Alexey-T]

do you have program '/bin/cp' and '/usr/bin/pkexec'? if not, run

which pkexec

what does it show?

i made a test. copied my file fold-issue.json to /usr/src/ and removed 'w' permissions from it. i got OK result in Cud. it can edit file and save it:

[Alexey-T]

For files that have no permission for user to read, I see Cannot open file- permisison denied.

yes, in this case Cud don't work.

If there is read permission I can open the file and write, but I cannot save: EWriteError, Cannot save file:

what is full file path? what ls -l does show for file?

[timur-g]

I see /bin/cp' and 'which pkexec' gives: /usr/bin/pkexec File I tested is: -rw-r--r-- 1 root root 0 How to get that dialog, is it some plugin?

[Alexey-T]

How to get that dialog, is it some plugin?

it is build-in dialog of 'pkexec' (which is run by Cud when saving file).

i cannot repeat the problem with -rw-r--r-- 1 root root 0. what is full file path? what is ls -l of parent dir?

[timur-g]

I confirm what you wrote and got that dialog in other folder with the same permissions 644 but other parent permission.

Imagine that 1st time I tried I got this error :) Here is this folder, it is somewhat artificial as I just wanted to test, but still possible. drwxrwxr-x 4 user user 4,0K Jul 27 15:39 . drwxr-x--- 57 user user 4,0K Jul 27 15:51 .. -rw-r--r-- 1 root root 11 Jul 27 14:47 root.txt

With that save dialog, could you convert this issue to get the same dialog on fileopen, if there are no sufficient permisisons for that?

[Alexey-T]

drwxr-x--- 57 user user 4,0K Jul 27 15:51 ..
-rw-r--r-- 1 root root 11 Jul 27 14:47 root.txt

with this, I got the error EWriteError: cannot save file. will study this case.

[Alexey-T]

i made a fix! let's test 1 of 2 binaries: linux x64 gtk2 / qt5.

builds.zip

[timur-g]

Yes, working now, thanks. One issue per ticket and this one may be closed. But please comment if I should open the new one for the same dialog on fileopen, if there are no sufficient permisisons.

[Alexey-T]

issue for missing R permission? yes, open a new issue for that. I cannot solve it so easy, so it will stay for some time.