extracting PHP errors & warnings from apache log

slackware:

cd /var/log/httpd 

or  debian

cd  /var/log/apache2

clear ; cat error.log | grep PHP | grep -P  '(.*])\K.*' -o |sort -u

How to prevent web admin session expiration on routers (Huawei at least)

Note: this post is just a  public draft.

1)  open Firefox

2) visit your router's administration web page. 

3) Open debugger. 

4) Log in

5) on the Network tab, right click on the first entry (usually index.php or whatever) and under "Copy" select "Copy as cURL"

6) open konsole or whatever terminal you preffer

7) write watch -n 30 and a double quote, then paste and add -k -o /dev/null and close the double quotes

8) hit enter to run watch and go back to your browser.

leave your web admin tab open, otherwise you will have to repeat all the steps.

this trick might be useful on every site that makes your session expire via ajax calls.

Script to prevent SSH attacks while allowing you to connect from dynamic IP address.

while most of the time connecting to a remote server using openvpn would be a smart choice, sometimes it's not an option. This script is for a linux behind a firewall/router. It's intended to prevent SSH attacks (by simply denying access to the SSH port) while allowing you to connect from your own dynamic DNS, that is, if you have a dynamic ip given by your ISP, otherwise you could simply use iptables.

#!/bin/bash
valor=`host yourdyndns`
OK=$?
if [ $OK -ne 0 ]; then
  exit
fi
addr=$(echo $valor |egrep "address .*" -o)
ip=$(echo $parte |egrep "[0-9\.]*" -o)

whitelist=/root/whitelist
touch ${whitelist}

exists=`cat ${whitelist} | grep "${parte2}"`

if [ $? -ne 0 ]; then
  echo $ip >$whitelist
  iptables -F   iptables -A INPUT -s $ip -j ACCEPT
  iptables -A FORWARD -s $ip -j \ ACCEPT                                                                                         
  iptables -A INPUT -p tcp --dport 22022 -j DROP                                                                                   
fi

add this to rc.local to reload iptables during bootup:

# delete whitelist

rm /root/whitelist

# run previous script

/root/bin/testso.sh

x2x on Slackware

 I had to write something. This was kinda shocking to me. I was looking for a KVM (Keyboard, Video and Mouse) software to be able to control my notebook from my PC.  Been using an old free version of Synergy, but for some odd reason seems to be compiled for 32 bits and I felt it was a terrible waste to install multilib just to run it. So I decided to look for an alternative.

As usual, went to google and discovered that Slackbuilds has Barrier but when I tried to install it, it asked for avahi, and avahi asked for something else and that something else asked for other-something-else. So I gave up. Then I came across x2x.

This particular software has a wikipedia page so I wont bother telling the story about it.

    cd

    mkdir -p install/util/x2x

    cd install/util/x2x

    wget https://slackbuilds.org/slackbuilds/14.2/desktop/x2x.tar.gz

    tar xf x2x.tar.gz 

    cd x2x

    wget https://slackware.uk/~urchlay/src/x2x-1.30_beta+20200121_ec10215.tar.xz

    su

    ./x2x.SlackBuild

    installpkg /tmp/x2x-1.30_beta+20200121_ec10215-x86_64-1_SBo.tgz

then I have to create an script to connect to my notebook, but before I get into that I had to read the man page, last section, after the examples, gives an important tip when you have multiple monitors 

Left: 1920*1080 (primary)

Right: 1366*768

So I had to do the math and write the parameters to x2x according to the man page:

#!/bin/bash
ssh -YC rudy@macabra x2x -north -to :0.0 -big  -completeregionleft 0 -completeregionup 0 -completeregionright 3286 -completeregionlow 768

I have ssh configured so it wont ask me for password. North parameter means I placed my notebook "over" my monitors and it doesn't really matter from which monitor my mouse goes up, it appears on my notebook and it's able to travel  the entire notebook screen.

What shocked me about this is the fact it's a very old proyect, but works like a charm.

 

    

Script to reconnect wan via rc.inet1

My router is a Linux PC with 2 lan boards, one for local lan and the other directly connected to the ISP router (configured as bridge). Each time my ISP disconnects me for whatever reason I had to either reboot the computer or keep running rc.inet1 restart until the connection is made.

So, even if it doesn't happen often, at one point I got bored of it and decided to write an script to force the reconnection as soon as possible:

 #!/bin/bash
while true ; do
   clear
   ./rc.inet1 restart
   ping google.com -c 1
   if [ $? == 0 ]; then
      exit
   fi;
   sleep 30
done

 

bash script to kill a process based on partial name

why you might need this: because sometimes some processes can't simply terminated using the GUI. And after too many years typing ps -A | grep something then kill -9 the id, I decided to write a script to avoid having to type two commands.

Be warned, this will only kill the first process found with the lowest process ID.

it takes only one argument as the partial name to be looked upon the ps -A command.

#!/bin/bash
proc=$(ps -A |grep $1 | head -n 1)
if [ -z "$proc" ] ; then
   echo Error: no processes found with the given partial name!
   exit 1
fi
echo ps -A says:
echo $proc
procid=$( echo "$proc" |grep "[0-9]*" -o |head -n 1)

echo "kill? <Y/N>"
read answer
if [ "$answer" != "${answer#[Yy]}" ] ;then
    echo Yes
    kill -9 $procid
    echo Testing if the process is still alive ...
    isdead=$(ps -A |grep "$proc")
    [ -z "$isdead" ] && echo Process has been terminated! || echo process is still alive !?
else
    echo No!
fi

you can replace the question with the actual command but I don't recommend it.

Eclipse PDT preventing focus stealing during test running with PHPUnit

you are writting code and at some point you press Ctrl-F11 to run the default test configuration. Thing is: both Console and PHPUnit window will steal the focus from the source editor.
theres  a bug report marked as NEW while its 4 years old and some other fixes for Mac but I ended up with the easiest solution: to do not test under Eclipse and instead use an external console. The script I made in bash is as follows:

#!/bin/bash

clear
inotifywait -m --format %w%f -q -r -e close_write $1 $2 | \
while read CUAL
do
    if [ $? == 0 ]; then
        clear
        phpunit.phar --color  $1
   fi
done

first parameter is the location of the dir containing the tests, or the test Suite. Second parameter is the directory from where inotifywait should watch for changes on filesystem.
  

PHP to UML

I wanted a tool to convert PHP classes to UML, but I also wanted to be able to modify the result.

As a (maybe positive) side effect I had to separate all PHP classes in a particular directory in order to avoid the tool to get confused with other scripts used to generate Javascript code among other things.


(this post may require some revisions)

grab php2xmi from

http://tech.motion-twin.com/php_php2xmi.html

sample script to run on project directory:

php2xmi \
--no-private \
--no-protected \
--output=/home/rudy/borrame/myresult.xmi \
`find src/class -name "*.php"`

add --path= if you need to include other project files

once you get the XMI file, you can import it with ArgoUML

http://argouml-downloads.tigris.org/argouml-0.34/

it wont generate the UML on the fly

bash script to kill another script by pid file

the idea is to get the pid from a running script and save it to a file, so we can retrieve the id and kill the process. Also it should kill child processes

to create the file, during the script we must do (replace /home/mantener/var/run with another dir of your liking):

minombre=$(basename $0)
pidfile=/home/mantener/var/run/$minombre.pid
echo $$ >$pidfile

 
 and the script to make use of the pid file could be:

#!/bin/bash
pidfile=/home/mantener/var/run/$1.pid

if [ ! -f $pidfile ] ; then
   echo missing $pidfile !
   logger $0 missing $pidfile !
   exit -1
fi

cualpid=$(cat $pidfile)

# get child processes
resto=$(ps --ppid $cualpid -o pid --no-headers)

echo killing $1
kill -9 $cualpid

while IFS= read -r line ; do
    echo killing $line
    kill -9 $line
done <<< "$resto"

rm $pidfile

script to kill a specific process by name

This one was made specifically for VLC since the stupid program sometimes hangs and there is no way to close it by normal means (Quit command, etc)

#!/bin/bash
$(echo -n kill -9 ; ps -A |grep vlc |grep -o "^ [0-9]*")

what it does is to create a command line on the fly by extracting vlc process id and then execute it.

ffmpeg: converting m4a to mp3 script

to be able to do this, ffmpeg must be compiled with mp3 support.

#!/bin/bash
mkdir mp3
for file in *.m4a
   do ffmpeg -i "${file}" -vn -ar 44100 -ac 2 -ab 128k -f mp3 mp3/"${file/%m4a/mp3}"
done

zeroing a disk on linux using DD

WARNING: if you don't really understand what are you doing (even if you THINK you are), then start learning/reading first or asking someone who really understands linux BEFORE doing something stupid like erasing a wrong disk by mistake.

if you need to wipe the content of a hard disk (REPLACE /dev/sda with the appropiate device !):

dd if=/dev/zero of=/dev/sda bs=1M 

last parameter (block size) makes the process a lot faster

inotifywait example

edit: modified parameter "-n 1" to the "head" command

for this example I'm assuming text files:
to avoid confusions long lines are splitted with \

#!/bin/bash

if [ $# -ne 2 ]
    then
    echo "$0 <src dir> <dst dir>"
    exit
fi

clear

inotifywait $1 -qmre CLOSE_WRITE \
--format='%f' | while read WHICHONE ; do  
   if [ $? != 0 ]; then exit; fi;
   LINESELECTED=$(head -n 1 $WHICHONE | \
grep CONDITION)

if[ $LINESELECTED -eq 1 ] then
   cp $1/$WHICHONE $2
fi

done

phpunit script

assuming theres a test directory inside a project where the source files are held:

#!/bin/bash

if [ $# -ne 2 ]
    then
    echo "testphp <test dir> <src dir>"
    echo "example: $ testphp test ."
    exit
fi

clear

inotifywait $2 -qmre CLOSE_WRITE --format='%f' | while read CUAL ; do  
   if [ $? != 0 ]; then exit; fi;
   clear
   phpunit.phar --log-junit /tmp/ultimo.txt --color -v $1
done

new install to-do list

this post is a work in progress:

after installing slackware, things to do besides the normal setup like configuring network card:

copy ssh keys from old install
copy /etc/sshd config?
copy .bashrc from old home install or the entire home directory
user groups review? (seems like its no longer needed under Slackware 14.2)
xorgsetup ? only if needed
compat32
libreoffice ?
wine?
firefox 40 (yes I stick to this version until Firefox can fix newer versions problems).


kde: fix nasty konsole prompt, edit Shell: /bin/bash -l

Installing PHP 7 from source

this post assumes you are familiar with Slackware 14.2 and have php 5.6 installed

1. Donwload php from sources, and extract it
2. inside the sources, create a script with this code or copy/paste on bash:
   

   #!/bin/bash
   ./configure \
       --with-config-file-path=/etc \
       --with-config-file-scan-dir=/etc \
       --enable-mbstring \
       --enable-zip \
       --enable-bcmath \
       --enable-pcntl \
       --enable-ftp \
       --enable-exif \
       --enable-calendar \
       --enable-sysvmsg \
       --enable-sysvsem \
       --enable-sysvshm \
       --enable-wddx \
       --enable-intl \
       --with-curl \
       --with-iconv \
       --with-gmp \
       --with-pspell \
       --with-gd \
       --with-jpeg-dir=/usr \
       --with-png-dir=/usr \
       --with-zlib-dir=/usr \
       --with-xpm-dir=/usr \
       --with-freetype-dir=/usr \
       --enable-gd-jis-conv \
       --with-openssl \
       --with-pdo-mysql=/usr \
       --with-gettext=/usr \
       --with-zlib=/usr \
       --with-bz2 \
       --with-apxs2=/usr/bin/apxs \
       --with-mysqli=/usr/bin/mysql_config \
       --with-ldap \
     --with-libdir=lib64

   edit: the long line from above as one line:
   ./configure --with-config-file-path=/etc --with-config-file-scan-dir=/etc --enable-mbstring --enable-zip --enable-bcmath --enable-pcntl --enable-ftp --enable-exif --enable-calendar --enable-sysvmsg --enable-sysvsem --enable-sysvshm --enable-wddx --enable-intl --with-curl --with-iconv --with-gmp --with-pspell --with-gd --with-jpeg-dir=/usr --with-png-dir=/usr --with-zlib-dir=/usr --with-xpm-dir=/usr --with-freetype-dir=/usr --enable-gd-jis-conv --with-openssl --with-pdo-mysql=/usr --with-gettext=/usr --with-zlib=/usr --with-bz2 --with-apxs2=/usr/bin/apxs --with-mysqli=/usr/bin/mysql_config --with-ldap --with-libdir=lib64
   
   
3. make
4. make test
5. su
6. make install
7. edit /etc/httpd/mod_php.ini and comment lib_php5.so line
8. rc.httpd restart

slackware 14.2 bashrc

Slackware 14.2 has many changes since version 14.0. So far the most annoying to me is the prompt under console and the ls colors.  So I figured I should copy/paste the definitions from 14.0 into a .bashrc

#!/bin/bash
export PATH=$PATH:/home/rudy/bin
export PS1='\u@\h:\w\$ '
export LS_COLORS='no=00:fi=00:di=01;34:ln=01;36:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.bat=01;32:*.BAT=01;32:*.btm=01;32:*.BTM=01;32:*.cmd=01;32:*.CMD=01;32:*.com=01;32:*.COM=01;32:*.dll=01;32:*.DLL=01;32:*.exe=01;32:*.EXE=01;32:*.7z=01;31:*.ace=01;31:*.ACE=01;31:*.arj=01;31:*.bz2=01;31:*.cpio=01;31:*.deb=01;31:*.dz=01;31:*.gz=01;31:*.jar=01;31:*.lzh=01;31:*.lzma=01;31:*.rar=01;31:*.RAR=01;31:*.rpm=01;31:*.rz=01;31:*.tar=01;31:*.taz=01;31:*.tb2=01;31:*.tbz2=01;31:*.tbz=01;31:*.tgz=01;31:*.tlz=01;31:*.trz=01;31:*.txz=01;31:*.tz=01;31:*.tz2=01;31:*.xz=01;31:*.z=01;31:*.Z=01;31:*.zip=01;31:*.ZIP=01;31:*.zoo=01;31:*.aac=01;35:*.AAC=01;35:*.anx=01;35:*.asf=01;35:*.ASF=01;35:*.au=01;35:*.axa=01;35:*.axv=01;35:*.avi=01;35:*.AVI=01;35:*.bmp=01;35:*.BMP=01;35:*.divx=01;35:*.DIVX=01;35:*.flac=01;35:*.FLAC=01;35:*.gif=01;35:*.GIF=01;35:*.jpg=01;35:*.JPG=01;35:*.jpeg=01;35:*.JPEG=01;35:*.m2a=01;35:*.M2A=01;35:*.m2v=01;35:*.M2V=01;35:*.m4a=01;35:*.M4A=01;35:*.m4p=01;35:*.M4P=01;35:*.m4v=01;35:*.M4V=01;35:*.mid=01;35:*.midi=01;35:*.mka=01;35:*.mkv=01;35:*.MKV=01;35:*.mov=01;35:*.MOV=01;35:*.mp3=01;35:*.MP3=01;35:*.mp4=01;35:*.MP4=01;35:*.mp4v=01;35:*.mpc=01;35:*.MPC=01;35:*.mpeg=01;35:*.MPEG=01;35:*.mpg=01;35:*.MPG=01;35:*.nuv=01;35:*.oga=01;35:*.ogv=01;35:*.ogx=01;35:*.ogg=01;35:*.OGG=01;35:*.pbm=01;35:*.pgm=01;35:*.png=01;35:*.PNG=01;35:*.ppm=01;35:*.qt=01;35:*.ra=01;35:*.RA=01;35:*.ram=01;35:*.RAM=01;35:*.rm=01;35:*.RM=01;35:*.spx=01;35:*.svg=01;35:*.svgz=01;35:*.tga=01;35:*.TGA=01;35:*.tif=01;35:*.TIF=01;35:*.tiff=01;35:*.TIFF=01;35:*.vob=01;35:*.VOB=01;35:*.wav=01;35:*.WAV=01;35:*.wma=01;35:*.WMA=01;35:*.wmv=01;35:*.WMV=01;35:*.xbm=01;35:*.xcf=01;35:*.xpm=01;35:*.xspf=01;35:*.xwd=01;35:*.XWD=01;35:*.xvid=01;35:'
export LS_OPTIONS='-F -b -T 0 --color=auto'
alias d='dir'
alias dir='/bin/ls $LS_OPTIONS --format=vertical'
alias ls='/bin/ls $LS_OPTIONS'
alias mc='. /usr/share/mc/bin/mc-wrapper.sh'
alias v='vdir'
alias vdir='/bin/ls $LS_OPTIONS --format=long'

MySQLDump

how to properly dump a complete catalog (this post is a work in progress)



    mysqldump --login-path=XX database_here --add-drop-database --add-drop-table --add-drop-trigger --add-locks --comments --disable-keys --dump-date --lock-all-tables --log-error=/tmp/mysqldump.log --routines >/data/$RUTA/$SQLLOG

saving SPs only:

    mysqldump --routines --no-create-info --no-data --no-create-db --skip-opt database_here > outputfile.sql

    

Slackware: post installation

this page is going to be a reminder to myself about thing that should be done after installing Slackware. I'm not posting quite obvious things like running xorgconf.

Adding cdrom, printer and audio rights to the normal user I should normally use.

usermod -G lp,audio,cdrom username

Adding a line in /etc/rc.d/rc.local_shutdown to remove all the files in /etc/udev/rules.d, helps a lot when the underlying hardware changes or when having more than one Ethernet card with the same chipset.

If you plan to use squid, don't forget to add a rc.local_shutdown line to shut it down or it might break the cache on the process.

If the cache becomes a problem, create an script to stop it, remove the cache and restart it.

if situation allows it, going for ethernet bonding is a must.

http://www.sgvulcan.com/network-interface-bonding-in-slackware-version-13-1/

create a personal bin directory for scripts in your home dir

mkdir ~/bin
echo export PATH=$PATH:~/bin >~/.bash_profile

MySql post installation slackware

After installing MySql from source under Linux Slackware it may be a problem to have old binaries lying around in /usr/bin

here is my solution:

create an script and execute it from /usr/local/mysql

#!/bin/bash

for i in bin/*
do
echo -n "$i: "
echo
rm /usr/$i
ln -s /usr/local/mysql/$i /usr/$i
done