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Export variables from file

Sometimes we have a file like: FOO=“BAR” BAZ=“GriZmio” and we need to load it an export as variables. I’m too lazy to type this every time, so i put it in .bash_profile export_file() { source ${1} && export $(cut -d= -f1 ${1}) } Now, if i have a file i wrote, I can just type: $ export_file env_files.txt and the magic is done :-D

#bash #export #environment

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ESP32 Thing with Thingerio and multiple SSID

A modification to allow more than just 1 WIFI ssid and password. Every time a move the ESP32 thing with thingerio I need to flash it to set different SSIDs... Until NOW :-D

https://github.com/grizmio/Arduino-Library

#define WIFIS_COUNT 3 #include <WiFiClientSecure.h> #include <ThingerESP32.h> void setup(){ ... thing.add_wifi(0, "CASASSID", "foo"); thing.add_wifi(1, "CABANIASSID", "bar"); thing.add_wifi(2, "OFICINASSID", "baz"); ... }

#esp32 #thingerio #esp32 thing #wifi #multiple ssid

Java: Tuple, Greatest Common Divisor and least Common Multiples exercises

https://gist.github.com/grizmio/26f245d0c575001235c5a861b79f1297

package javaapplication4; import java.util.ArrayList; import java.util.List; /** * * @author grizmio */ public class JavaApplication4 { public static void main(String[] args) { System.out.println(leastCommonMultiple(5, 9)); System.out.println(leastCommonMultiple(15, 14)); System.out.println(leastCommonMultiple(2, 3)); System.out.println(leastCommonMultiple(2, 200)); System.out.println("--------"); System.out.println(multiplesTuples(6)); System.out.println(multiplesTuples(7)); System.out.println(multiplesTuples(9)); System.out.println("+++++++"); System.out.println(multiples(6)); System.out.println(multiples(7)); System.out.println(multiples(9)); System.out.println("Greatest common divisor: 3, 10: " + greatest_common_divisor(3, 10)); System.out.println("Greatest common divisor: 4, 10: " + greatest_common_divisor(4, 10)); } public static int greatest_common_divisor(int x, int y){ int min = Math.min(x, y); int max = Math.max(x, y); List max_mults = multiples(max); List min_mults = multiples(min); for(int i: min_mults){ System.out.println(i); if(max_mults.contains(i)){ return i; } } return -1; } public static int leastCommonMultiple(int x, int y){ int mi = Math.min(x, y); int ma = Math.max(x, y); int p = ma; for(;p%mi!=0;p+=ma){ } return p; } public static List > multiplesTuples(int x){ /* devuelve: (6) = [(1, 6), (2, 3), (3, 2), (6, 1)] (7) = [(1, 7), (7, 1)] (9) = [(1, 9), (3, 3), (9, 1)] */ List > mults_a = new ArrayList<>(); int last_greater = x; for(int i=1; i <= x ; i++){ for(int d = 0 ; d <= last_greater ; d++){ if( i * d == x){ mults_a.add(new Tuple<>(i, d)); last_greater = d; break; } } } return mults_a; } public static List multiples(int x){ /* devuelve: (6) = [6, 3, 2, 1] (7) = [7, 1] (9) = [9, 3, 1] */ List mults_a = new ArrayList<>(); int last_greater = x; for(int i=1; i <= x ; i++){ for(int d = 0 ; d <= last_greater ; d++){ if( i * d == x){ mults_a.add(d); last_greater = d; break; } } } return mults_a; } } class Tuple<X, Y>{ private final X _x; private final Y _y; Tuple(X x, Y y){ _x = x; _y = y; } X x(){ return _x; } Y y(){ return _y; } @Override public String toString(){ return "(" + String.valueOf(_x) + ", " + String.valueOf(_y) + ")"; } }

#Tuple #Greatest Common Divisor #least Common Multiples #minimo comun multiplo #maximo comun divisor #Java

Wampy typings @types

Wampy is an amazing, mature and stable project: https://github.com/KSDaemon/wampy.js

It have typings, but those typings are missing a new feature very useful, at least very useful to me :-D You are gonna see this error:

Expected 2 arguments, but got 3.

To fix the typings just add to it:

interface SubscribeAdvancedOptions { match: "prefix" | "wildcard";}

And replace "subscribe definition" with:

subscribe(topicURI: string, callbacks: (((args: any[], kwargs: any) => void) | SubscribeCallbacksHash), advancedOptions?: SubscribeAdvancedOptions): Wampy;

#wampy #wamp #typescript #typings #@types

Python 2.7 AGI function to dial PJSIP and get return status

https://gist.github.com/grizmio/701e9884c09e104427799ec52d14c747

#python #python2 #agi #asterisk

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Easy & Fast bash removeline

This is the most annoying message you could read in a ssh hurry:

baz:foo grizmio$ ssh [email protected] @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could be eavesdropping on you right now (man-in-the-middle attack)! It is also possible that a host key has just been changed. The fingerprint for the ECDSA key sent by the remote host is SHA256:+ZAA333A4Ar488888888AAAAAnzi08nv8NvAAAddAAAbbbAAAAA. Please contact your system administrator. Add correct host key in /home/grizmio/.ssh/known_hosts to get rid of this message. Offending RSA key in /home/grizmio/.ssh/known_hosts:8 ECDSA host key for 192.168.1.2 has changed and you have requested strict checking. Host key verification failed.

Add to ~/.bashrc file:

removesshline() { sed -i '' "$1d" ~/.ssh/known_hosts }

baz:foo grizmio$ . ~/.bashrc baz:foo grizmio$ removesshline 8 baz:foo grizmio$ ssh [email protected]

#bash #sed #ssh

Python asyncio dictionary ¿Queue? ¿Container?

Sometimes we just need some kind of queue based on a dictionary and a method to wait until the desired key is inserted. Something like:

dq = DictQueue() # ¿Queue? ¿Container? ¿Other? x = dq.get('magic key') y = dq.get_timeout('magic key', timeout=10) # seconds

but asyncio.Queue works like a list.

My use case: I'm working on an asterisk manager script which heavely depends on asyncio and need to handle more than one command or event at a time from different clients, max 20, connected to it. Doing it synchronous it's not an option, since wait for each command to end before send another one could end in a lot of of time, well, a lot of seconds. I uploaded my solution to github because it would be nice if other people could send pull requests of PEP8 correction, new methods: clear() for example, etc. I use it like this, the keys are actions id from asterisk, the vale, a dictionary, which is the result event from asterisk manager. This time, I will paste here the link to the code instead of paste it directly in this blog.

https://github.com/grizmio/DictQueue/blob/master/DictQueue.py

#python #python3 #asyncio #dictionary queue

HomeBrew Mac roto al actualizar a Sierra

Una de las cosas que se me rompió al actualizar a Sierra fue Homebrew, nunca más actualizó, ni funcó.

brew cleanup cd "$(brew --repo)" && git fetch && git reset --hard origin/master && brew update brew upgrade brew cleanup

#homebrew #brew #osx #macos #sierra

Javascript string format named parameters

En python tenemos la suerte de tener: ‘FOO {caca}’.format(caca=‘BAR’)

Pero en javascript no. Para eso podemos usar esta función, depende de la necesidad, se pueden cambiar en replacement las { } por algo que no choque con el resto de la página: String.prototype.format = function(){ var content = this; for (var key in arguments[0]){ var replacement = '{' + key + '}'; content = content.replace(new RegExp(replacement, 'g'), arguments[0][key]); } return content; }; var foo = ‘FOO {caca}‘.format( {caca:’BAR’} )

Python unknown remote IP using Broadcast

Sometimes you want your beaglebone be installed using dhcp, but without a screen, we wouldn't know the IP address. These scripts will do the magic, as you can see, they need improvement, but it will be a start point.

Server script:

import netifaces as ni import netaddr import json from socket import * def get_address_info(): for _nic in ('eth0', 'eth1', 'en0', 'en1'): try: net_info = ni.ifaddresses(_nic)[2][0] except: continue else: print('Informacion para la interfaz:', _nic) break cidr = netaddr.IPNetwork('%s/%s' % (net_info['addr'], net_info['netmask'])) network = cidr.network gateway = ni.gateways().get('default')[2][0] # {2: ('172.16.205.1', 'eth0')} net_info['gateway'] = gateway net_info['network'] = str(network) return net_info def main(port): cs = socket(AF_INET, SOCK_DGRAM) cs.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1) cs.setsockopt(SOL_SOCKET, SO_BROADCAST, 1) cs.bind(('', port)) while 1: # FIXME: debe estar en un loop checkeando time.time() y un timeout por si viene GriZmio sin \n, pero # el mensaje es tan corto que funca igual data, addr = cs.recvfrom(1024) if data.strip() == 'GriZmio': # cs.sendto('{}\n'.format(json.dumps(get_address_info(), separators=(',', ':'))), addr) cs.sendto('{}\n'.format(json.dumps(get_address_info(), separators=(',', ':'))), ('255.255.255.255', addr[1])) main(port=9999)

Client code: from socket import * s = socket(AF_INET, SOCK_DGRAM) s.setsockopt(SOL_SOCKET, SO_BROADCAST, 1) s.sendto('GriZmio', ('255.255.255.255', 9999)) r = '' while not r.endswith('\n'): data, addr = s.recvfrom(1024) r += data print(r.strip())

#python #python sockets #udp #broadcast #find equipment

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Php postgresql, mysql a csv

Para usar el snippet con mysql habria que cambiar el pg_fetch_assoc, pg_prepare y pg_execute por sus equivalentes con PDO o lo que sea: La mayoría lo saque de: http://stackoverflow.com/questions/3933668/convert-array-into-csv

// http://stackoverflow.com/questions/3933668/convert-array-into-csv function arrayToCsv( array &$fields, $delimiter=';', $enclosure='"', $encloseAll=false, $nullToMysqlNull=false, $linending="\n" ) { $delimiter_esc = preg_quote($delimiter, '/'); $enclosure_esc = preg_quote($enclosure, '/');

$output = array(); foreach ( $fields as $field ) { if ($field === null && $nullToMysqlNull) { $output[] = 'NULL'; continue; }

// Enclose fields containing $delimiter, $enclosure or whitespace if ( $encloseAll || preg_match( "/(?:${delimiter_esc}|${enclosure_esc}|\s)/", $field ) ) { $output[] = $enclosure . str_replace($enclosure, $enclosure . $enclosure, $field) . $enclosure; } else { $output[] = $field; } }

return implode( $delimiter, $output ).$linending; }

// el camelcase-ado se hara despues $query = 'SELECT foo_bar FROM baz'; $res1 = pg_prepare($connection, '', $query); $result = pg_execute($connection, '', $values);

if($result===false){ http_response_code(400); die; }

$dtz = new DateTimeZone("America/Santiago"); $now = new DateTime(date("Y-m-d H:i"), $dtz);

$filename = 'Foo'.$now->format("Y-m-d_H-i").'.csv'; header('Content-Type: application/csv'); header('Content-Disposition: attachment; filename="'.$filename.'";');

$f = fopen('php://output', 'w'); $row = pg_fetch_assoc($result); if($headers){ $headers_array = array_keys($row); // debe ir separado para evitar-> PHP Notice: Only variables should be passed by reference // por alguna razon, si los campo as incluyen mayusculas los convierte a minusculas, por eso usamos _ y este for asquerso foreach ($headers_array as &$h){ $h = str_replace(' ', '', ucwords(str_replace('_', ' ', $h))); } fputs($f, arrayToCsv($headers_array, $separator, $enclosed, true, true, "\n")); }

do{ fputs($f, arrayToCsv($row, $separator, $enclosed, true, true, "\n"));

// se puede usar pg_fetch_assoc($result) si se desea, si no PGSQL_ASSOC lo simula } while ($row = pg_fetch_array($result, NULL, PGSQL_ASSOC));

fclose($f);

#php #postgres #postgresql #mysql #csv #export

Vuze sin publicidad

Revisando las opciones de Vuze, encontré por casualidad la opción para deshabilitar la publicidad, aunque supongo que sería mejor pagarles por el buen programa que es...

Realtek RTL8192CU y otros RTL8192* + hostapd + dnsmasq + ubuntu 16.04

Usar lsusb para asegurarse del chipset y revisar en Internet si el chipset soporta modo master

# Instalación del driver: apt install linux-headers-$(uname -r) build-essential dkms dnsmasq # Sacado de: http://forum.ipfire.org/viewtopic.php?t=14654 git clone https://github.com/pvaret/rtl8192cu-fixes.git dkms add ./rtl8192cu-fixes dkms install 8192cu/1.8 # si ese falla, probar dkms install 8192cu/1.10 o dkms install 8192cu/1.11 etc

depmod -a cp ./rtl8192cu-fixes/blacklist-native-rtl8192.conf /etc/modprobe.d/

# Tal vez sea necesario configurar udev para que use wlan0, para eso debemos usar la mac, ifconfig -a mcedit /etc/udev/rules.d/70-persistent-net.rules SUBSYSTEM=="net", ACTION=="add", ATTR{address}=="60:e3:27:1f:64:4a", NAME="wlan0"

# Configurar la interfaz de red mcedit /etc/network/interfaces auto wlan0 allow-hotplug wlan0 iface wlan0 inet static address 10.0.0.1 netmask 255.255.255.0

# Configurar dnsmasq mcedit /etc/default/dnsmasq DNSMASQ_OPTS="--conf-file=/etc/dnsmasq.conf" mcedit /etc/dnsmasq.conf interface=wlan0 dhcp-range=10.0.0.20,10.0.0.200,12h dhcp-option=1,255.255.255.0

# Descargar hostapd desde: https://w1.fi/hostapd/ # Si se busca la version 2.5: https://w1.fi/releases/ # Instalar y configurar hostapd tar xzvf hostapd-2.5.tar.gz cd hostapd-2.5/ git clone https://github.com/pritambaral/hostapd-rtl871xdrv.git patch -Np1 -i hostapd-rtl871xdrv/rtlxdrv.patch cp hostapd-rtl871xdrv/driver_rt* src/drivers/ cp -f hostapd-rtl871xdrv/.config hostapd/.config cd hostapd hostapd-2.5/hostapd# make && make install

# Configurar hostapd: mcedit /etc/hostapd/hostapd.conf interface=wlan0 driver=rtl871xdrv ssid=pico hw_mode=g channel=6 macaddr_acl=0 ignore_broadcast_ssid=0 auth_algs=2

#####Sets WPA and WPA2 authentication##### #wpa option sets which wpa implementation to use #1 - wpa only #2 - wpa2 only #3 - both wpa=1 #sets wpa passphrase required by the clients to authenticate themselves on the network wpa_passphrase=0123456789 #sets wpa key management wpa_key_mgmt=WPA-PSK root@lisab:~#

# Para solucionar problema de falta de entropía, error lack of entropy apt install haveged

# Para lanzar hostapd: hostapd hostapd -d -e /dev/urandom /etc/hostapd/hostapd.conf

#RTL8192CU #hostapd #ubuntu #16.04 #ubuntu 16.04 #xenial #kernel 4 #linux kernel 4 #access point #howto

Instalar qt5 con homebrew en OS X

$ brew install caskroom/cask/brew-cask

https://ryanclouser.com/2015/07/16/OSX-Qt-Creator-Boost/ $ brew cask install qt-creator Inside Qt Creator Qt Creator -> Preferences -> Build & Run -> Qt Versions -> Add 5a. Select “Macintosh HD” 5b. Command + Shift + . 5c. /usr/local/Cellar/qt5/<version>/bin/qmake Select “Kits” -> Add 6a. Compiler -> Clang (x86 64bit) 6b. Qt version -> <version you added in step 5> OK

#qt #qtcreator #qt-creator #qt5 #osx #mac #homebrew #brew

Calibrar pantalla tactic de beagle bone black con debian o ubuntu

ejecutar:

# aptitude install xinput-calibrator

y seguir las instrucciones en pantalla y en consola que dice que pegar en xorg.conf

y listo

#beaglebone black #calibrate touchscreen

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Anya is LIVE right now

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Tunel Reverso

Nota: Todas las ip son ficticias. La configuración a modificar la saque de: http://superuser.com/questions/588591/how-to-make-ssh-tunnel-open-to-public

En mi casa tengo una ip privada que me da hamachi: 25.0.0.5 En la pega tengo un pc con hamachi que tiene la ip: 26.1.1.90 y una ip local: 172.16.215.22 Cerca del pc de la pega tengo un pc al que quiero llegar desde mi casa con la ip: 172.16.215.25

Entonces: 1.- El pc con la ip 26.1.1.90 que hará de puente configuro sshd_config: GatewayPorts yes 2.- Desde el pc 172.16.215.25 ejecuto: ssh -R 0.0.0.0:19999:localhost:22 -N [email protected] 3.- Desde casa con hamachi me logueo: $ ssh 26.1.1.90 -p 19999

Listo :-D

Clonar Instalacion Linux de disco grande a chico

Aunque en realidad se puede usar independiente del tamaño de los discos duros o particiones a clonar, lo hice específicamente para clonar una partición grande en una chica. Esto es lo que necesité ejecutar:

cfdisk /dev/sdb mkfs.ext4 /dev/sdb1 mkswap /dev/sdb2 mount /dev/sdb1 /harddisk2 mkdir /harddisk2/ # el rsync de la wiki de archlinux rsync -aAX --exclude={"/dev/*","/proc/*","/sys/*","/tmp/*","/run/*","/mnt/*","/media/*","/lost+found","/harddisk2"} / /harddisk2/ # obtener los UUID con # blkid y reemplazar el del disco duro antiguo por el nuevo en grub.cfg sed -i 's/ad1b2b48-30b1-4e54-a9cd-319ac1bf39a2/b0d5e709-3d7f-410f-a8d2-1a30741a13b1/g' /harddisk2/boot/grub/grub.cfg En fstab la particion y swap sed -i 's/cf337598-bf26-4b1f-93b9-9545e157f7ab/5c843697-fe3f-4bb8-a0bf-55529629809d/g' /harddisk2/etc/fstab sed -i 's/ad1b2b48-30b1-4e54-a9cd-319ac1bf39a2/b0d5e709-3d7f-410f-a8d2-1a30741a13b1/g' /harddisk2/etc/fstab grub-install --boot-directory=/harddisk2/boot/ /dev/sdb

listo

#clonar #clone #partition #linux #bigger partition #rsync #grub

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