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This repo contains a few sundry scripts potentially useful to the general GNU/Linux-using public. The scripts are categorized into directories as follows:

  • arch - Arch Linux-specific scripts
  • dev - generic software development-related scripts
  • eesti - scripts specific to Estonian services
  • perl - Perl-specific scripts
  • X - scripts useful within a graphical user environment (X11)

The root directory contains miscellaneous other scripts, lib currently only contains backends for backup, data contains configuration files. The scripts expect a full-featured modern Linux system as their environment; standard requirements like perl, awk, wget etc. are not listed for each script. Many scripts can be run with no arguments, -h or --help for usage info. I'm guilty of the mortal sin of using tabs (4) instad of spaces, so beware.

backup

A multi-purpose script for backing up a directory tree into a tarball or via duplicity. The script sources .backup.conf from the current working directory for options. See .backup.conf.example for a template and explanations of options. The tar backend supports

  • numbered backups (000, 001, ...)
  • rotating a fixed maximum number of backups through logrotate
  • e-mailing the tarball through mutt
  • keeping a log file for backups in README

Requires:

  • GNU tar (for the tar backed)
  • duplicity (for the duplicity backend)
  • logrotate (for rotating the backups)
  • mutt (for e-mailing the backups)

See backup, lib/backup* and .backup.conf.example for details.

mp3tag

mp3tag {-t | -f} filename [filename ...]

Copy mp3 tags to the filename as ARTIST - TITLE.mp3 (-f) or write the artist and title tags to the mp3 file (-t) based on the filename formatted as such. Requires eyeD3.

vid2x264

Convert a video stream into high quality x264; by default 720p, CRF 20, 
preset: slow.

Convenience frontend to ffmpeg. Convert input to x264 video, based on a hardcoded profile. Available profiles are currently 720high and 480med.

Usage example:

vid2x264 -i input.mp4 -p 720high output.mkv

youtube2mp3

Convert a Youtube video or playlist specified by a passed URL to mp3, use
mp3tag to write ID3 tags. Arguments are passed to youtube-dl.

Requires youtube-dl and mp3tag (see above) on $PATH.

arch/ckfpkgs

Check whether foreign packages have become available in binary 
repositories

arch/nongrppkgs

List explicitly-installed packages that are not part of a group

arch/pkgdate

Output packages sorted by install date, one per line with the install 
date prepended to the package name. All command line arguments are 
passed on to pacman.

arch/rqfpkgs

List foreign packages (e.g. from AUR) that are required by other 
packages

dev/reflow

A Perl script accepting a block of comments (lines starting with # or //; also handles Python docstrings) on its standard input and piping a nicely formatted result to its standard output. Use as an editor extension (Geany, vim, ...). Requires Text::Autoformat and pipes the cleaned input through its main routine. As an extended feature, supports formatting argument list documentation, i.e.

	// Add a tool to the toolbar. Attributes:
	//
	// id - identifier string, required
	// toggle - a boolean specifying whether the tool is a toggle button
	// handlers - an object of [jQuery] event handlers, keyed by event. The handler will 
	// receive the tool spec object as event.data.

will be formatted as

	// Add a tool to the toolbar. Attributes:
	// 
	// id       - identifier string, required
	// toggle   - a boolean specifying whether the tool is a toggle button
	// handlers - an object of [jQuery] event handlers, keyed by event. The 
	//            handler will receive the tool spec object as event.data.

dev/sshagconn

This script attempts to solve the problem that we would like to have a) secure and b) convenient SSH authentication even in environments that are volatile, lack secure storage or are not entirely under our control. The specific case that inspired creation of this script was SSH access to git remotes from Docker containers on a shared server. Setting up SSH keys is beyond the scope of this document, but this is covered in detail elsewhere.

sshagconn connects to a running ssh-agent or launches one if it is not running and consigns the desired SSH private key under its management. The private key should be encrypted with a passphrase and in this case, the passphrase is requested only once between container or machine reboots. On other terminals, the script may simply be run without any further involvement from the user to set up environment variables pointing to the running ssh-agent instance. sshagconn is meant to run just as ssh-agent itself, i.e. it outputs some instructions to be parsed by the shell. In Bash, this is best achieved with process substitution:

$ source <(sshagconn /path/to/keyfile)

It is convenient to alias this to a easily remembered token:

$ alias github='source <(sshagconn /path/to/keyfile)'
$ alias > ~/.bash_aliases
$ echo 'source ~/.bash_aliases' >> ~/.bashrc

The final step is to link the key file to the host name in SSH configuration. Add a similar block to ~/.ssh/config for each host:

Host github
HostName github.com
IdentityFile /path/to/keyfile

In the future, you only need to invoke github on each terminal that you wish to use for pushing to remotes:

$ github
$ git push

eesti/bank

A script to analyze a Swedbank CSV bank statement and group 
expenditures by function, based on the groups defined in 
`statementgroups`. Pass the statement and statement groups filenames as 
the arguments.

What it says on the tin. Pass a CSV account statement from Swedbank and a statement groups file (see data/statementgroups.example, first column is the group, second column is a pattern (full Perl regexp, really) to match against the transaction comment or recipient). The output is a neat table of grouped expenditures and incomes. Requires Text::ASCIITable and Text::CSV.

eesti/iptv

A script for watching or capturing Elion's multicast-based IPTV. Reads data/iptvrc for channel definitions. If the passed network interface is on IPTV_NET, attempt to open the multicast stream, otherwise fall back to the web stream. For use with the new router firmware (>=8.C.D.9); see older versions (<2016-05) for use with the separate IPTV subnet.

Requires:

iptvrc format:

  • 1st column - channel ID
  • 2nd column - mcast stream URL
  • 3rd column - fallback (web) stream URL

Usage:

iptv [-c output.mp4] [-a] [-i interface]
  • -i interface - network interface to use
  • -c filename - dump stream to filename instead of opening in VLC
  • -a - use alternative (fallback) stream

Note: This script possibly requires one or more of the following to use: a) spoof a set-top box's MAC address to the desired network interface, b) set up the multicast route (route add -net 224.0.0.0 netmask 240.0.0.0 dev interface_name) c) force your system to use IGMPv2 d) add an iptables rule to accept multicast packets, if using the firewall. Please do not contact me about troubleshooting your network configuration.

eesti/r2get.py

A script for downloading shows from Raadio 2. See r2get.py -h for more or less comprehensive usage instructions, and the file header for technical details.

Requirements:

eesti/weather

Without arguments, print the current temperature from 
meteo.physic.ut.ee If -R is given, print the record temperature days 
this year. If -r is given, reverse the order (i.e. display the coldest 
dates). If -i is given, invert minima and maxima (i.e. show warmest 
daily minima with -R, coldest daily maxima with -Rr). -n determines the 
number of dates to output. -y determines year, current year by default.

perl/plckmods

Utility for finding all Perl files under the current directory and 
listing dependency modules. $* is passed to scandeps.pl. Pass -n to 
list unavailable dependencies, in such case $* is ignored.

Requires scandeps.pl

perl/plinstall

Install Perl modules to a specific directory. Pass the prefix as the 
first argument and any modules to install as subsequent arguments.

perl/plmodavail

Check availability of a Perl module

perl/plstordmp

Dump the contents of a Storable serialized in a file, file name passed 
as the command line argument

X/ckfs

Check if there are full-screen windows with title matching a pattern, 
in which case disable power management. Useful for running as a 
frequent cron job or from a periodic script.

X/pidginctl

Command-line control of Pidgin via D-Bus. Currently toggles available / 
offline mode.

X/remoted.pl

A remote control daemon leveraging the power of LIRC to turn your Android device into a remote for your machine using a client such as this one.

Usage:

  • Set up LIRC on your machine. You may use the generic remote definition, either way, remoted.pl expects devinput as the remote's ID.

  • Set up the client on your android device, download the devinput definition from your LIRC server and configure your remote. Note: make sure to use SIMULATE mode.

  • Create an action mapping file, see data/remotedrc as an example. This either maps actions to a command to run (two fields) or invokes an internal function (three or more fields). In the latter form, the second field is the name of the function in angle brackets and the rest are its arguments. Two functions are available:

    • <mpris> - Control VLC via D-Bus / MPRIS. See the specification for details; methods for most expected actions (play, stop, seek, etc.) are available.
    • <vlc_start> - Start VLC and open the passed URI (3rd field). If VLC is already running, no new instance is spawned.

  • Run remoted.pl, passing the action mapping file as a parameter. You should be able to control VLC and invoke any other actions via your Android device now.

X/spotifyctl

Command-line control of Spotify. Pass "play", "pause", "next", "prev" 
or "previous" as the argument.

X/windowdim

Resize a window (partially) matching the title.

Requires xdotool, xwininfo.