buffering

concerning stdio functions:
write to file is buffered (does not react on \n)
write to terminal is line-buffered (autoflushes on \n)
http://www.pixelbeat.org/programming/stdio_buffering/

TUGboat

https://www.dropbox.com/s/97e68ke8saq1rwk/tugboat.cmn https://www.dropbox.com/s/c916gz2j01nll57/tugboat.sty

Мухоловка

https://pikabu.ru/story/kak_izbavitsya_ot_mukh_na_dache_avstraliyskaya_mukholovka_svoimi_rukami_6003652

usb on notebook

SET CONTROL LINE STATE comes before SET LINE CODING, but it must not come at all on connection stage. See if the following allows to avoid the SET CONTROL LINE STATE, or the cause is in the driver: Try "systemctl stop ModemManager[.service]", but first find modemmanager via "ps" and after stopping ensure that it disappeared. If "systemctl ..." does not work, google how to stop modemmanager in ubuntu

Soldering iron

https://www.explainthatstuff.com/heating-elements.html

Oscilloscope (TODO: see which power supply and order it)

https://www.youtube.com/watch?v=d7aWz98CHzM

Green House

https://www.youtube.com/watch?v=3suqsclnWiI

How to fill pdf files with forms

http://www.pdffiller.com/

wxwidgets example

% sudo apt-get install libwxgtk3.0-dev libwxbase3.0-dev wx3.0-headers (check if one of them depends on the others to reduce this list)

% g++ `wx-config --cxxflags --libs` hello.c

@i c++lib.w
@ @c
#include <wx/wx.h>

class MyApp: public wxApp
{
  virtual bool OnInit();
}@+@t\hskip -.1cm@>;

IMPLEMENT_APP(MyApp)@;

bool MyApp::OnInit()
{
  wxMessageBox( L"Это пример программы на библиотеке wxWidgets",
                L"О программе", wxOK | wxICON_INFORMATION );
  return true;
}

wide character resources

1) Text from Amendment 1 to C90 (see first paragraph on page 191):
     http://www.open-std.org/jtc1/sc22/wg14/www/docs/C99RationaleV5.10.pdf

2) Brief description of Amendment 1 to C90:
     http://www.lysator.liu.se/c/na1.html

3) ISO C Amendment 1 (MSE - Multibyte Support Extensions):
     http://www.unix.org/version2/whatsnew/login_mse.html

3) Page with a lot of links, which includes link 1) above:
     http://www.cse.psu.edu/~deh25/cmpsc311/Lectures/Standards/CStandard.html

4) Links to C standard:
     http://stackoverflow.com/questions/81656/where-do-i-find-the-current-c-or-c-standard-documents
     http://stackoverflow.com/questions/17014835/where-can-i-find-the-c89-c90-standards-in-pdf-format

-----------

Functions that convert between multibyte and wide characters (from C90):

mblen
mbtowc
wctomb
mbstowcs
wcstombs

Fitball

Notes on GL-iNet 6416A

check if it will get IP from dhcp if it is plugged into wan and if it will get IP if it is plugged into lan, and understand the reason for it (BTW, dir320 does get ip both from wan and from lan)
sm. knizhechku po gl-inet - tam pro 2 usb porta skazano?
first configure network as necessary from web interface (connecting wan port to the main router for internet access) (check via "uci show ..."), because you may reset to factory defaults
only then install asterisk and the rest
set ip address on d-link to 192.168.8.2 and open 192.168.8.1 in browser
ask question why bootloader gives garbage on openwrt forum and on aliexpress
vypisat GL-AR150

how to slow down video in ffmpeg

use "-c:v libxvid" or "-c:v libx264"
see also lfk.tex

minicom config for openwrt

cat << EOF > /home/user/.minirc.openwrt
pu port      /dev/ttyUSB0
pu baudrate  115200
pu bits      8
pu parity    N
pu stopbits  1
pu minit
pu mreset
pu rtscts    No
pu logfname
EOF

how to connect via modem

sudo systemctl enable serial-getty@ttyS0.service
shutdown now -r
ps -ef|grep getty
if no serial, "sudo systemctl start dev-ttyS0.device" and reboot again
search which command must be entered not to reboot

git branch

create new branch and push it to upstream:
git checkout -b <branch>
git push -u origin <branch>
and set <branch> to be cloned by default (<branch> may be "master" or another required branch):
git remote set-head origin <branch>

pull branch from upstream (see all branches with "git branch -a"):
git checkout <branch>

----------------------

To be able to "git diff" to branches, you need to set up necessary branches to track corresponding remote branch from origin:
  1) add information about the branch to .git/config
      git checkout <branch_name>
  2) previous command also automatically switches to the branch, so if it is necessary to return to master branch, do this
      git checkout master

krop

cut off extra margins in pdf file with "krop" and then print it with "fit" option in atril

BOOT

You can use the kernel parameter
'boot_delay=1000' to slow down the boot messages.