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Projects:    wifi-switcher    cl-libconfig    esy

See my github page.


For years I used graphic utilities (wicd and NetworkManager) on my laptops to establish wireless network connections. Then I realized that linux actually has a number of reliable command-line utilites (iwlist, ifup, ifdown, isc-dhcp-server, wpa_supplicant, hostapd) that provide almost the same functionality as wicd or NetworkManager. I wrote a perl frontend for these command-line utilites which can be used to connect to (or create a) wifi network. I primarily use it with my favorite window manager IceWM; howerver, it is also compatible with a pdmenu menu program which can be launched from any terminal, even in text mode. The source and debian package are available here. I believe that now it is stable (>6 month testing in debian jessie and stretch); please email me if it does not install or work properly.

These screenshots demonstrate wifi management in IceWM and in console (using pdmenu):
wifi-switcher screenshot (X Window) wifi-switcher screenshot (console)
where "disorder" is the name of my wireless network, and signal strength in graphically shown in front of every network's name.

Apart from switching between wifi-networks, wifi-switcher can be turned into the wifi-server (adhoc) mode with an ftp server. This is especially handy for my wife's windows smartphone which does not have a slot for an external sdhc-card: I connect the phone to the adhoc wifi-network, log in to the ftp-server using TotalCommander and move the files (photo/audio/video) from/to the smartphone.


Lisp is my favorite programming language; unfortunately, it is not so widely used and there are still no lisp-interfaces to some handy libraries. I liked to work with the libconfig library in my C++ projects; it is universal (available for C, C++, python, perl), and its syntax is powerful enough for my needs. (I always use libconfig unless I have to deal with large amounts of data.)

cl-libconfig is the common lisp interface to libconfig; it is available on github. If you have quicklisp installed, place cl-libconfig source into the ~/quicklisp/local-projects/libconfig/ directory, and then you can use it in lisp (say, sbcl) via the (ql:quickload :libconfig) command.


I do not trust clouds. I think that they would use my files (if they could) to gather information about my habits, income, etc., and then sell it (without paying me anything) to those annoying people who call me every day trying to sell something. This is what I suspect about companies like Google or Dropbox. When I started cloud backups, only Russian cloud services had official linux clients; 2016-08-26 I discovered that Dropbox has got an official linux client. For Google Drive there is (unofficial but open source) grive. May be I should try them one day; but for now I use yandex-disk with apparmor for backup storage. For daily backups I use backup2l with gpg-encryption so that even my file names are not accessible to cloud owners.

Esy (stands for "easy synchronization") is a lisp-code which synchronizes files/directories between different computers; it is not necessary that all the hosts are online. When a file/directory on one host is renamed/moved/erased/modified/chmod-ed, this is recorded by the esy daemon. When I stopped working on this host (say, in the office), I tell the daemon to stop:

echo "quit" > ~/.esy/message.ctl ; mkdir ~/.esy/do-read.ctl

It creates an archive of newly created and modified files; (Only important files are monitored; the importance is flexibly encoded in configuration file.) Also a shell script with commands to unpack/rename/move/erase/chmod the files on another host is created. The sorce code together with examples of configuration, generated shell scripts, and logs is available on github page.

This project is unstable for now.

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