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The Stallman wars

Open Source

So, 2021 isn't bad enough yet, but don't despair, people are working to fix that:

Welcome to the Stallman wars

Team Cancel: https://rms-open-letter.github.io/ (repo)

Team Support: https://rms-support-letter.github.io/ (repo)

Current stats are:

Team Cancel:  3023 signers from 1413 individual commit authors
Team Support: 6677 signers from 5310 individual commit authors

Git shortlog (Top 10):

rms_cancel.git (Last update: 2021-04-27 23:35:27 (UTC))
  1230  Neil McGovern
   251  Joan Touzet
    97  Elana Hashman
    73  Molly de Blanc
    36  Shauna
    19  Juke
    18  Stefano Zacchiroli
    17  Alexey Mirages
    16  Devin Halladay
    14  Nader Jafari

rms_support.git (Last update: 2021-05-11 08:01:18 (UTC))
  1785  shenlebantongying
  1583  nukeop
  1554  Ivanq
   987  Victor
   844  Job Bautista
   123  nekonee
    79  Victor Gridnevsky
    41  Patrick Spek
    25  Borys Kabakov
    17  KIM Taeyeob

(last updated 2021-05-11 08:05:15 (UTC))

Technical info:
Signers are counted from their "Signed / Individuals" sections. Commits are counted with git shortlog -s.
Team Cancel also has organizational signatures with Mozilla, Suse and X.Org being among the notable signatories. The 16 original signers of the Cancel petition are added in their count. Neil McGovern, Juke and shenlebantongying need .mailmap support as they have committed with different names.

Further reading:

12.04.2021 statements from the accused:

18.04.2021 Debian General Resolution

The Debian General Resolution (GR) vote of the developers has concluded to not issue a public statement at all, see https://www.debian.org/vote/2021/vote_002#outcome for the results.

It is better to keep quiet and seem ignorant than to speak up and remove all doubt.

See Quote Investigator for the many people that rephrased these words over the centuries. They still need to be recalled more often as too many people in the FLOSS community have forgotten about that wisdom...

tail -S (truncating lines to terminal width)

Open Source

The tail command has a quite glaring omission in that it can't truncate lines. Thus it wraps long log line into multiple terminal lines regardless. Which makes them very hard to read.

I used to work around this using less -S and then hitting the [F] key but that's interactive. less +F <filename> is the little known work-around for the interactive issue but that still doesn't work well with pipes (tail -f logfile | grep "ERROR:" etc).

There is a bug report from 2004 against GNU coreutils but that went nowhere.

So we're not getting a tail -S anytime soon.

Bash to the rescue: tail -S → tails

Hence I wrote this little script, tails [1kB]:

  1. #!/bin/bash -i
  2. # v2 from 170712: introduce loop to work around GNU coreutils issues with pipe/fifo/isatty
  3.  
  4. if [[ -z "$COLUMNS" ]] ; then
  5.         MYCOL=$(tput cols)
  6. else
  7.         MYCOL=${COLUMNS}
  8. fi
  9. tail "$@" | while read line; do
  10.         echo "$line" | expand | cut -c1-${MYCOL:-80}
  11. done

Now, there are some interesting bits even in this tiny script:

The bash -i results in $COLUMNS being set within the script on sane Linux bash. Otherwise that variable wouldn't be available. Because it is a shell variable and not an environment variable. You knew that, right?

Unfortunately the bash -i doesn't get $COLUMNS set on either MacOS (X) or FreeBSD, so that's where the tput cols comes into play. It outputs the column width for the current terminal to stdout.

If all that fails tails will default to 80 columns.

So tails -f /var/log/apache/access.log will now look nice.

Corner case: color

If you use color codes somewhere (grep --color=always, dmesg --color=always) tails will just truncate lines too short so they will still not wrap.
There is a slight risk that it may cut into half a color code escape sequence and mess up the terminal a bit. You could change that by removing the -i from the shebang line and setting $COLUMNS explicitly. But that then needs manual adjustment for each combination of colored lines (=count of ANSI sequences) and terminal width. Better to color after the tails invocation then where possible, e.g. tails -f /var/log/httpd/error.log | grep ':error' to watch for PHP errors and the like.

Mended corner cases: inconsistent tail behaviour

A first version of the script didn't use a loop but just had

tail "$@" | expand | cut -c1-${MYCOL:-80}

This would break tails -f on Debian (coreutils 8.23) / Ubuntu (coreutils 8.26) while removing the |expand would make it work. On Fedora 25 (coreutils 8.25) I couldn't get tails -f to work at all with that v1. The cut (so just a single command chained) already broke the pipe :-(. And nope, stdbuf didn't help.

If you have a more simple solution to work around the isatty / isfifo mess, please leave a comment!

Alternatives

If you want to show multiple log tails in parallel, highlight strings etc. multitail is worth a look.

Depending on what you want to achieve you could also tell your terminal emulator to not wrap lines:

setterm -linewrap off; less -SR +F /var/log/apache/access.log; setterm -linewrap on