rsperl

# src: http://www.davidpashley.com/articles/writing-robust-shell-scripts/

# noclobber will not redirect to an existing file
if ( set -o noclobber; echo "$$" > "$lockfile") 2> /dev/null; 
then
  # we have the lockfile, so be sure to remove it if the script exits early
  trap 'rm -f "$lockfile"; exit $?' INT TERM EXIT

  # do our critical stuff

rsperl

import sqlalchemy
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Column, Integer, String, ForeignKey
from sqlalchemy.orm import sessionmaker, relationship, backref
from sqlalchemy.ext.associationproxy import association_proxy
import uuid
 
engine = sqlalchemy.create_engine('sqlite:///:memory:')
Base = declarative_base()
 

rsperl

import socket

s = socket.socket(socket.AF_INET, type=socket.SOCK_STREAM)
s.bind(('localhost', 0))
address, port = s.getsockname()
print("Bound to {} on port {}".format(address, port))
s.close()

rsperl

Pipenv

Holy Grail For Python Environments

tony · 2 months ago · Python src: https://devel.tech/tips/n/pIpEnvNh/pipenv/

Packaging and environments in python

rsperl

#!/bin/bash

volumelabel="TimeMachine"
dounmount=0
verbose=0
xtrace=0

model=$(sysctl -n hw.model)
case "$model" in
*MacBook*)

rsperl

#import <objc/runtime.h>
#import <Foundation/Foundation.h>

// src: https://apple.stackexchange.com/questions/80058/lock-screen-command-one-liner/123738#123738
// compile with 
// clang -framework Foundation main.m -o lockscreen

int main () {
    NSBundle *bundle = [NSBundle bundleWithPath:@"/Applications/Utilities/Keychain Access.app/Contents/Resources/Keychain.menu"];

rsperl

#
# because there are more than 1500 values for the member attribute, you have to get the paged
# results. The attribute will be named member;range=x-y unless it's the remainder, in which
# case it will be member;range=x-*. If you search beyond the last result, no entries will be
# returned
#
my @current_member_dns;


# define the maximum number of members we will look for

rsperl

import-module activedirectory
import-csv .\createusers.csv | % {New-ADUser -GivenName $_.GivenName -Surname $_.Surname -Name $_.Name -SamAccountName $_.SamAccountName -Description $_.Description -Path $_.Path -Enabled $True -UserPrincipalName $_.UPN -EmailAddress $_.UPN -AccountPassword (convertto-securestring $_.Password -AsPlainText -force) }


## where createusers.csv looks like
# Index,GivenName,Surname,Name,SamAccountName,UPN,Description,Path,Enabled,Password,PasswordNeverExpires,ChangePasswordAtLogon
# "0001","test","user0001","test user0001","user0001","test.user0001@domain.internal","test user0001","OU=Users,OU=TST,OU=SL1,DC=domain,DC=internal","$True","Orion123_","$True","$False"
# "0002","test","user0002","test user0002","user0002","test.user0002@domain.internal","test user0002","OU=Users,OU=TST,OU=SL1,DC=domain,DC=internal","$True","Orion123_","$True","$False"

rsperl

Bash Substrings

src: https://opensource.com/article/17/6/bash-parameter-expansion

${varname:offset} get the last part of a string

$ v='richard'
$ echo ${v:3}
hard

$

rsperl

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import time
import os
from pid import PidFile, PidFileAlreadyLockedError

lockdir = "/tmp/"
filename = "mylockfile"
lockfile = os.path.join(lockdir, filename + ".pid")