Some Linux tools for handling and filtering the passwd file

 Linux  Comments Off on Some Linux tools for handling and filtering the passwd file
Apr 222022
 

Linux (and other Unixes) store user information in a file called passwd and the associated passwords in another file called shadow, both located in /etc. Both files are text files and use a : as the field separator.

I currently have the need to sort and filter these files in various ways. This post is mostly so I can look it up later, but if it is useful for others, you’re welcome.

Sort the passwd file by the user id

The user id is stored in the 3rd field of the file and it is numeric:

sort --numeric --field-separator=: --key=3 passwd

Remove computer accounts from passwd and shadow

If the computer is used as the domain controller for a Samba NT4 domain, the files contain entries for all computers in the the domain. These user name for these entries ends in a dollar sign “$”. So we need a regular expression that excludes all these entries.

grep -v "^[^:]*\$:" passwd
grep -v "^[^:]*\$:" shadow

Remove system users from passwd

On a Linux system there are many system accounts that are used for special purposes, e.g. for the web server, email or backup. These accounts have a user id < 1000 (this might be some specialty of Ubuntu Linux). We only want lines where the user id has 4 digits. We also must be sure that these 4 digits are in the user id field, so we have to anchor the regex on the start of the line and skip the name and password (always "x") field.
egrep “[^:]:x:[0-9]{4}:” passwd

(On servers with very many users, there may be user ids with more than 4 digits, but that doesn’t currently concern me.)

 Posted by on 2022-04-22 at 18:28

GExpertsInst is not a valid reference

 Delphi, GExperts  Comments Off on GExpertsInst is not a valid reference
Apr 152022
 

Starting with GExperts 1.3.20 calling the standalone Experts Manager displayed the error message “GExpertsInst is not a valid reference”. After that the tool actually works fine.

This bug has now been fixed in the current source code. I don’t think this minor inconvenience justifies a new release.

 Posted by on 2022-04-15 at 11:52

some dxgettext improvements

 Delphi, dxgettext  Comments Off on some dxgettext improvements
Apr 102022
 

I fixed a bug in the dxgettext executable which made it add wrong ressource string names to the po files which in turn made the msgmergePOT tool select wrong translations. You will have to compile your own executable to get this bugfix. The source code is in the project’s svn repository on SourceForge.

Also I added scripts to generate partial German and French translations for Delphi 10, 10.1, 10.2, 10.3 and 10.4 and even added those partial translations for Delphi 10, 10.1, 10.2 and 10.4 (note that 10.3 is missing) to the repository. Warning: These translations may still be faulty.

 Posted by on 2022-04-10 at 18:31

GExperts 1.3.21 experimental twm 2022-04-09 released

 Delphi, GExperts  Comments Off on GExperts 1.3.21 experimental twm 2022-04-09 released
Apr 092022
 

You may remember that I was forced to reduce GExperts support for Delphi 6 a while ago, because the IDE no longer started on my computer. It turns out that it was a GExperts bug after all.

The fix was simple once I knew what the problem was. And I only found out because carrchri, one of the few GExperts for Delphi 6 users, debugged it and told me. Thanks a lot!

When I was able to use the Delphi 6 IDE again I also fixed incompatibilities in the DFMs that prevented some of the dialogs open in Delphi 6.

So here is a new release. Apart from these two Delphi 6 related bug fixes there are some improvements to the code formatter also submitted by users:

Achim Kalwa again also submitted some patches for fixing bugs.

On top of that various High DPI display problems with Delphi 11 as well as a long standing display problem for owner drawn string grids (e.g. in the Uses Clause Manager) have been fixed.

The new GExperts version still supports all Delphi versions back to Delphi 6 (with the notable exception of Delphi 8).

As always: Report and any bugs you find (or contribute bug fixes) and also file feature requests or maybe even contribute implementations for these features.

It might take a while but I am always looking at those tickets when I find the time.

Head over to the GExperts download page to get it.

Discussion about this post in the international Delphi Praxis forum.

 Posted by on 2022-04-09 at 15:14