Develop Reference

How to login to IBM 5250 emulator using Python/Java/.NET? [duplicate]

I need to login to IBM i System using Python without entering the username and password manually.
I used py3270 library but it is not able to detect the Emulator wc3270. The emulator I use has .hod extension and opens with IBM i Launcher.
Can anyone help me with this? what could be the possible solution for this?

os.system() is a blocking statement. That is, it blocks, or stops further Python code from being executed until whatever os.system() is doing has completed. This problem needs us to spawn a separate thread, so that the Windows process executing the ACS software runs at the same time the rest of the Python code runs. subprocess is one Python library that can handle this.
Here is some code that opens an ACS 5250 terminal window and pushes the user and password onto that window. There's no error checking, and there are some setup details that my system assumes about ACS which your system may not.
# the various print() statements are for looking behind the scenes
import sys
import time
import subprocess
from pywinauto.application import Application
import pywinauto.keyboard as keyboard
userid = sys.argv[1]
password = sys.argv[2]
print("Starting ACS")
cmd = r"C:\Users\Public\IBM\ClientSolutions\Start_Programs\Windows_x86-64\acslaunch_win-64.exe"
system = r'/system="your system name or IP goes here"'
# Popen requires the command to be separate from each of the parameters, so an array
result = subprocess.Popen([cmd, r"/plugin=5250",system], shell=True)
print(result)
# wait at least long enough for Windows to get past the splash screen
print("ACS starting - pausing")
time.sleep(5)
print("connecting to Windows process")
ACS = Application().connect(path=cmd)
print(ACS)
# debugging
windows = ACS.windows()
print(windows)
dialog = ACS['Signon to IBM i']
print(dialog)
print("sending keystrokes")
keyboard.send_keys(userid)
keyboard.send_keys("{TAB}")
keyboard.send_keys(password)
keyboard.send_keys("{ENTER}")
print('Done.')

Currently, I am facing the same issue. I was able to run the IBMi (ACS), however, once it run, my python script stop functioning as if the app is preventing the python from being running. In generally speaking, the app seems to not detecting the script.But once I closed the app, my python script continue to work.. I put some indication e.g timesleep, however as i mentioned earlier, it only continue to that line of code once IBM is closed. There will be few lines to be added to move the selection to 5250 and inject the credential.
*I tried with pyautogui, still facing the same issue. so now i tried pywinauto import keyboard .
#Variables
dir = sys.argv[1]
username = sys.argv[2]
password = sys.argv[3]
x = dir.split("\\")
print(x[-1])
command = "cd \ && cd Users/Public/Desktop && " + '"' + x[-1] + '"'
print(command)
os.system(command)
------ FROM THIS LINE OF CODE ONWARDS, IT STOPPED RUNNING ONCE IBM IS LAUNCHED ---
print('TIME START')
time.sleep(5)
print('TIME END')
keyboard.send_keys(username)
keyboard.send_keys(password)
keyboard.send_keys("{ENTER}")
print('Done.')
Appreciate your help to look into this matter. Thanks

How to handle python script exit via terminating cmd/batch file abnormally

I want to execute a python script on my windows startup.. which tracks my daily PC usage.
Script execution notes the time when i start my PC as 'starttime'. and should note the time 'endtime' when i shut down my PC.
Since script will be executed background, when i shutdown, batch file will be terminated abnormally(I've created batch file to run in startup).
So I am facing trouble to handle such script exit to fetch the 'endtime'
Though i tried 'sys','atexit' and even try,catch statements to have the end time. I am unable to fetch when the cmd(batch file cmd) is closed via 'X' button.
import time
with open("report_time.txt",'a') as f:
f.write(str(int(time.time()))+ '\n') # Start time
def main():
try:
while(True):
pass
finally:
with open("report_time.txt",'a') as f:
f.write(str(int(time.time()))+ '\n') # End time(This code works fine for keyboard interrupt)
main()

Set WshShell = WScript.CreateObject("WScript.Shell")
Set objWMIService = GetObject("winmgmts:\\.\root\CIMV2")
Set objEvents = objWMIService.ExecNotificationQuery("SELECT * FROM Win32_ComputerShutdownEvent")
Do
Set objReceivedEvent = objEvents.NextEvent
wscript.echo objReceivedEvent.Type
Loop
This is VBScript using WMI. The program waits for you to shutdown computer.

Bad Display Name when running Python script on boot with Touch Screen

Attempting to run a Python script on boot on Raspberry Pi 3B+ 1GB RAM, Raspbian, with a SunFounder 10" Touch Screen, - .log file returns "Bad display name'
Python script is 100% functional when run via Terminal / executable script / Thonny etc. Attempted to run at boot first via rc.local - created a service, enabled service, daemon-reload... etc. Did not work.
Tried to run as crontab, same result - .log output from crontab shows "Bad display name". Thought it was lack of Display Environment imported and declared within the Python script, so I added that - but on boot returns the same result.
This is the Python Script I'm using
#!/usr/bin/env python3
import RPi.GPIO as GPIO
import os
import sys
import webbrowser
import time
import subprocess
from pynput import keyboard
from Xlib.display import Display
#GPIO Readout
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
#GPIO Header Setup
header = 2
GPIO.setup(header, GPIO.IN)
#Omxplayer Commands
Loop = 'omxplayer -b --loop --no-osd -o hdmi /home/pi/Videos/PlanetEarth.mp4 > /dev/null'
Donation = 'omxplayer -b --no-osd -o hdmi /home/pi/Videos/Cartoon.mp4 > /dev/null'
KillPlayer = 'pkill omxplayer.bin'
KillForm = 'pkill chromium'
#Set Display Environment
new_env = dict(os.environ)
new_env['DISPLAY'] = ':0.0'
#Form Handling Required Below
#If Donation is successful, Stop Looping Video, Open Form in Chromium, Wait 60 seconds, Close Chromium, Restart Loop
def PullDownSuccess():
subprocess.Popen(KillPlayer, env=new_env, shell=True)
time.sleep(2)
webbrowser.open('<url>')
time.sleep(60)
subprocess.Popen(KillForm, env=new_env, shell=True)
time.sleep(2)
subprocess.Popen(Loop, env=new_env, shell=True)
#Inception
subprocess.Popen(Loop, env=new_env, shell=True)
#Terminate Loop with Escape Key or Manually Initiate Donation Success
def on_press(key):
if key == keyboard.Key.ctrl:
PullDownSuccess()
if key == keyboard.Key.esc:
subprocess.Popen(KillPlayer, shell=True)
#Keyboard Listener Module
with keyboard.Listener(
on_press=on_press) as listener:
listener.join()
#Donation Successful Do:
while True:
header_state = GPIO.input(header)
if header_state == GPIO.HIGH:
PullDownSuccess()
I am currently attempting to run this script on Boot via crontab with this line:
#reboot (/bin/sleep 10; /usr/bin/python3 /home/pi/Custom_Scripts/<script>.py > /home/pi/Custom_Scripts/cronjoblog 2>&1)
The error log file for crontab returns the following:
raise error.DisplayNameError(display)
Xlib.error.DisplayNameError: Bad display name ""
This error only exists when attempting to run script on boot up. Is the Display overriding the boot display permissions on Boot Up? What is keeping the script from running on the Display on boot up, but not when remotely executed? Thank you for your consideration.
Update: Still no solution. Display environment returns ":0.0' ... so far I have tried to remove
> /dev/null from #Omxplayer Commands
Replacing crontab startup line to:
DISPLAY=":0" /usr/bin/python3 /home/pi/Custom_Scripts/<script>.py
and
DISPLAY=":0.0" /usr/bin/python3 /home/pi/Custom_Scripts/<script>.py
And any possible combination of these.
Confirmed the script is not waiting for any background processes as I have added delay (time.sleep) up to 30 seconds, as well as returning IP addresses, etc.
Returns either Bad Display Name still OR "Can't connect to display ":0": b'Invalid MIT-MAGIC-COOKIE-1 key"
Still looking for a solution if anyone has one.
EDIT:
Fixed using /LXDE-pi/autostart. Answer below.

Try to add DISPLAY environment variable before calling your script:
DISPLAY=":0" /usr/bin/python3 /home/pi/Custom_Scripts/<script>.py

DISPLAY="/dev/null" /usr/bin/python3 /home/pi/Custom_Scripts/<script>.py
Have you tried a longer sleep?

If you try to get your ip adress during your startup script with (for example) :
import socket
def get_ip_address():
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.connect(("8.8.8.8", 80))
return s.getsockname()[0]
you will get an errror like:
File "/usr/lib/python2.7/socket.py", line 228, in meth
return getattr(self._sock,name)(*args)
error: [Errno 101] Network is unreachable
This is because at reboot network is not necessarily available. In order to make it available
see https://raspberrypi.stackexchange.com/questions/45769/how-to-wait-for-networking-on-login-after-reboot :
sudo raspi-config
then select option 3 Boot Options
then select option 4 Wait for network at boot
Once you have done that networking should not be an issue at reboot.
You get also check for other ways to enforce network setup before running your script take a look at :
https://askubuntu.com/questions/3299/how-to-run-cron-job-when-network-is-up

If there are unforeseen ramifications for using this method, I will update this thread accordingly. I fixed this issue just by adding two lines to the autostart file which resides in /etc/sdg/lxsession/LXDE-pi/autostart.
sudo nano /etc/xgd/lxsession/LXDE-pi/autostart
Add these two lines, do not modify the existing code.
sleep 5
#/usr/bin/python3 /home/pi/Custom_Scripts/<script>.py
My autostart file looks like this:
#lxpanel --profile LXDE-pi
#pcmanfm --desktop --profile LXDE-pi
#xscreensaver -no-splash
point-rpi
sleep 5
#usr/bin/python3 /home/pi/Custom_Scripts/<script>/py
Ctrl + O to write file
sudo reboot

Python - Get current user folder when launching project remotely

I have a program i am launching from a Jenkins server.
I created an exe using pyinstaller and installed it on two computers. and then Jenkins calls them both.
At first i used os.path.expanduser('~') to get the user path but it returned
"C:\Windows\System32\config\systemprofile"
After i tried to just get the user name using os.environ['USERPROFILE']
still got:
"C:\Windows\System32\config\systemprofile"
Lastly i found a different solution that didnt require os module and tried:
import ctypes.wintypes
CSIDL_PERSONAL = 5 # My Documents
SHGFP_TYPE_CURRENT = 0 # Get current, not default value
buf= ctypes.create_unicode_buffer(ctypes.wintypes.MAX_PATH)
ctypes.windll.shell32.SHGetFolderPathW(None, CSIDL_PERSONAL, None,
SHGFP_TYPE_CURRENT, buf)
print(buf.value)
That gave no value back in my log value.
If i run the exe locally, all the value return back normally.
The batch command i run is
start /wait C:\JenkinsResources\MarinaMain.exe
So im drawing a blank as how i can get this program to find the user folder of the computer it is on, when i call it remotely.

So to get this to work I first downloaded the Windows Power Shell plugin.
After the restart I used the command:
$PCAndUserName = Get-WMIObject -class Win32_ComputerSystem | select username
$UserName = [string]$PCAndUserName
$UserName = $UserName.split("\\")[-1]
$UserName = $UserName -replace ".{1}$"
$UserName
That gave me the name of the current user on the computer regardless of if I launch remotely with Jenkins.

CGI script end of script before headers

I have a VPS server with Apache on it. I want to execute simple CGI script. I created a python script, saved it as .cgi file and placed it to the folder cgi-bin, but it only displays error message: "End of script output before headers".
However when I saved this script as .py file and did not place it into cgi-bin folder, it worked, but whenever there was an error, it did not show any error message, just server error. Command cgitb.enable() did not show any error.
I tried to give the file 755 permission, but that still did not solve my problem.
Where could be a problem?
Source code:
#!/usr/local/bin/python3
print("Content-type:text/html")
print("")
print ("<html><head><title>CGI</title></head>")
print ("<body>")
print ("hello cgi")
print ("</body>")
print ("</html>")
Thank you for your answers.

It might be more useful to use sys.stdout.write and add \n so that you know exactly what gets written to standard output:
#!/usr/bin/env python
import sys
import os
sys.stdout.write('Status: 200 OK\n')
sys.stdout.write('Content-Type: text/html; charset=utf-8\n\n')
sys.stdout.write('<html><body>Hello, world!</body></html>\n')
sys.exit(os.EX_OK)
Run the script with python script.py | cat -e so that you can verify line endings.
Make sure you aren't sending any more HTTP headers after you start sending content.