README.md

@@ -8,7 +8,7 @@
 
 ## Install ##
 
-`pip install qrcode sysv-ipc pycstruct brother-ql`
+`pip install qrcode brother-ql`
 
 ```
 cd /root/

reHDDPrinter.py

@@ -3,75 +3,214 @@
 
 """ Author:                     Hendrik Schutter, localhorst@mosad.xyz
     Date of creation:           2022/11/23
-    Date of last modification:  2022/11/23
+    Date of last modification:  2025/06/15
 """
 
-import sysv_ipc 
+import ctypes
-import pycstruct
 import os
 import time
+import signal
+import argparse
+import warnings
+import logging
+from PIL import Image
 from brother_ql.brother_ql_create import create_label
 from brother_ql.raster import BrotherQLRaster
 import layouter
 
-str_buffer_size = 64        #keep this synchronous to reHDD
+# Suppress deprecation and printer warnings
-msg_queue_key = 0x1B11193C0 #keep this synchronous to reHDD
+warnings.filterwarnings("ignore", category=DeprecationWarning)
+logging.getLogger("brother_ql").setLevel(logging.ERROR)
+
+# Constants
+STR_BUFFER_SIZE = 64
+MSG_QUEUE_KEY = 0x1B11193C0
+IPC_CREAT = 0o1000
 
 file_name = "output.png"
 printer_path = "/dev/usb/lp0"
 
-def get_struct_format():
+terminate = False
-    #keep this synchronous to struct in reHDD
+
-    driveData = pycstruct.StructDef()
+
-    driveData.add('utf-8', 'driveIndex', length=str_buffer_size)
+class TDriveData(ctypes.Structure):
-    driveData.add('utf-8', 'driveHours', length=str_buffer_size)
+    _fields_ = [
-    driveData.add('utf-8', 'driveCycles', length=str_buffer_size)
+        ("caDriveIndex", ctypes.c_char * STR_BUFFER_SIZE),
-    driveData.add('utf-8', 'driveErrors', length=str_buffer_size)
+        ("caDriveHours", ctypes.c_char * STR_BUFFER_SIZE),
-    driveData.add('utf-8', 'driveShredTimestamp', length=str_buffer_size)
+        ("caDriveCycles", ctypes.c_char * STR_BUFFER_SIZE),
-    driveData.add('utf-8', 'driveShredDuration', length=str_buffer_size)
+        ("caDriveErrors", ctypes.c_char * STR_BUFFER_SIZE),
-    driveData.add('utf-8', 'driveCapacity', length=str_buffer_size)
+        ("caDriveShredTimestamp", ctypes.c_char * STR_BUFFER_SIZE),
-    driveData.add('utf-8', 'driveState', length=str_buffer_size)
+        ("caDriveShredDuration", ctypes.c_char * STR_BUFFER_SIZE),
-    driveData.add('utf-8', 'driveModelFamiliy', length=str_buffer_size)
+        ("caDriveCapacity", ctypes.c_char * STR_BUFFER_SIZE),
-    driveData.add('utf-8', 'driveModelName', length=str_buffer_size)
+        ("caDriveState", ctypes.c_char * STR_BUFFER_SIZE),
-    driveData.add('utf-8', 'driveSerialnumber', length=str_buffer_size)
+        ("caDriveModelFamily", ctypes.c_char * STR_BUFFER_SIZE),
-    driveData.add('utf-8', 'driveReHddVersion', length=str_buffer_size)
+        ("caDriveModelName", ctypes.c_char * STR_BUFFER_SIZE),
-    return driveData
+        ("caDriveSerialnumber", ctypes.c_char * STR_BUFFER_SIZE),
+        ("caDriveReHddVersion", ctypes.c_char * STR_BUFFER_SIZE),
+    ]
+
+
+class TMsgQueueData(ctypes.Structure):
+    _fields_ = [
+        ("msg_queue_type", ctypes.c_long),
+        ("driveData", TDriveData),
+    ]
+
+
+# IPC bindings
+libc = ctypes.CDLL("libc.so.6")
+msgget = libc.msgget
+msgrcv = libc.msgrcv
+
+msgget.argtypes = [ctypes.c_int, ctypes.c_int]
+msgget.restype = ctypes.c_int
+
+msgrcv.argtypes = [
+    ctypes.c_int,
+    ctypes.POINTER(TMsgQueueData),
+    ctypes.c_size_t,
+    ctypes.c_long,
+    ctypes.c_int,
+]
+msgrcv.restype = ctypes.c_ssize_t
+
+
+def signal_handler(signum, frame):
+    global terminate
+    print(f"Signal {signum} received, terminating...")
+    terminate = True
+
+
+signal.signal(signal.SIGINT, signal_handler)
+signal.signal(signal.SIGTERM, signal_handler)
+
+
+def wait_for_printer():
+    while not os.path.exists(printer_path):
+        print("Printer not found, waiting ...")
+        time.sleep(30)
+    return True
+
+
+def create_drive_objects(drive_info):
+    """Convert dictionary to layouter-compatible DriveData and ReHddInfo objects"""
+    drive = layouter.DriveData(
+        drive_index=int(drive_info["driveIndex"]),
+        drive_state=drive_info["driveState"],
+        modelfamily=drive_info["driveModelFamily"],
+        modelname=drive_info["driveModelName"],
+        capacity=int(drive_info["driveCapacity"]),
+        serialnumber=drive_info["driveSerialnumber"],
+        power_on_hours=int(drive_info["driveHours"]),
+        power_cycle=int(drive_info["driveCycles"]),
+        smart_error_count=int(drive_info["driveErrors"]),
+        shred_timestamp=int(drive_info["driveShredTimestamp"]),
+        shred_duration=int(drive_info["driveShredDuration"]),
+    )
+
+    rehdd_info = layouter.ReHddInfo(
+        link="https://git.mosad.xyz/localhorst/reHDD",
+        version=drive_info["driveReHddVersion"],
+    )
+
+    return drive, rehdd_info
+
+
+def worker(queue_id, test_mode=False):
+    try:
+        while not terminate:
+            if test_mode:
+                drive_info = {
+                    "driveIndex": "42",
+                    "driveHours": 44,
+                    "driveCycles": 45,
+                    "driveErrors": 43,
+                    "driveShredTimestamp": int(time.time()),
+                    "driveShredDuration": 0,
+                    "driveCapacity": 42,
+                    "driveState": "shredded",
+                    "driveModelFamily": "modelFamily",
+                    "driveModelName": "modelName",
+                    "driveSerialnumber": "serial",
+                    "driveReHddVersion": "V1.1.2",
+                }
+            else:
+                msg = TMsgQueueData()
+                result = msgrcv(
+                    queue_id,
+                    ctypes.byref(msg),
+                    ctypes.sizeof(TMsgQueueData) - ctypes.sizeof(ctypes.c_long),
+                    0,
+                    0,
+                )
+                if result == -1:
+                    err = ctypes.get_errno()
+                    print(f"Error reading from message queue: {os.strerror(err)}")
+                    break
+
+                d = msg.driveData
+                drive_info = {
+                    "driveIndex": d.caDriveIndex.decode().strip("\x00"),
+                    "driveHours": int(d.caDriveHours.decode().strip("\x00")),
+                    "driveCycles": int(d.caDriveCycles.decode().strip("\x00")),
+                    "driveErrors": int(d.caDriveErrors.decode().strip("\x00")),
+                    "driveShredTimestamp": int(
+                        d.caDriveShredTimestamp.decode().strip("\x00")
+                    ),
+                    "driveShredDuration": int(
+                        d.caDriveShredDuration.decode().strip("\x00")
+                    ),
+                    "driveCapacity": int(d.caDriveCapacity.decode().strip("\x00")),
+                    "driveState": d.caDriveState.decode().strip("\x00"),
+                    "driveModelFamily": d.caDriveModelFamily.decode().strip("\x00"),
+                    "driveModelName": d.caDriveModelName.decode().strip("\x00"),
+                    "driveSerialnumber": d.caDriveSerialnumber.decode().strip("\x00"),
+                    "driveReHddVersion": d.caDriveReHddVersion.decode().strip("\x00"),
+                }
+
+            print(f"Received Drive Data: {drive_info}")
+
+            drive_obj, rehdd_info = create_drive_objects(drive_info)
+            layouter.generate_image(drive_obj, rehdd_info, file_name)
+
+            if wait_for_printer():
+                qlr = BrotherQLRaster("QL-570")
+                image = Image.open(file_name)
+                create_label(qlr, image, "62")
+                with open(printer_path, "wb") as file:
+                    file.write(qlr.data)
+                os.remove(file_name)
+            else:
+                print("Skipping printing due to printer unavailability.")
+
+            if test_mode:
+                break
+
+    except Exception as e:
+        print(f"Worker encountered an error: {e}")
+
 
 def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "--test", action="store_true", help="Run in test mode with fake data"
+    )
+    args = parser.parse_args()
+
+    if args.test:
+        print("Running in test mode.")
+        worker(None, test_mode=True)
+        return
+
     try:
-        mq = sysv_ipc.MessageQueue(msg_queue_key, sysv_ipc.IPC_CREAT)
+        queue_id = msgget(MSG_QUEUE_KEY, 0)
+        if queue_id == -1:
+            raise RuntimeError("Failed to connect to the existing message queue.")
 
-        while True:
+        worker(queue_id)
-            message, mtype = mq.receive()
+    except Exception as e:
-            driveData = get_struct_format().deserialize(message)
+        print(f"Main process encountered an error: {e}")
 
-            rehdd_info = layouter.ReHddInfo("https://git.mosad.xyz/localhorst/reHDD", driveData['driveReHddVersion'])
-            drive = layouter.DriveData(
-            drive_index=int(driveData['driveIndex']),\
-            drive_state=str(driveData['driveState']),\
-            modelfamiliy=str(driveData['driveModelFamiliy']),\
-            modelname=str(driveData['driveModelName']),\
-            capacity=int(driveData['driveCapacity']),\
-            serialnumber=str(driveData['driveSerialnumber']),\
-            power_on_hours=int(driveData['driveHours']),\
-            power_cycle=int(driveData['driveCycles']),\
-            smart_error_count=int(driveData['driveErrors']),\
-            shred_timestamp=int(driveData['driveShredTimestamp']),\
-            shred_duration=int(driveData['driveShredDuration']))
-
-            while(not os.path.exists(printer_path)):
-                print("Printer not found, waiting ...")
-                time.sleep(30) #sleep 30
-
-            layouter.generate_image(drive, rehdd_info, file_name)
-            qlr = BrotherQLRaster("QL-570")
-            create_label(qlr, file_name, '62')
-
-            with open(printer_path, 'wb') as file:
-                file.write(qlr.data)
-            os.remove(file_name)
-    except sysv_ipc.ExistentialError:
-        print("ERROR: message queue creation failed")
 
 if __name__ == "__main__":
     main()