Run 'freecad -c' from php throws error qt.qpa.xcb: could not connect to display

[agustavo87]

Seems you have some sort of permission error, you should run it with the --write-log option an upload the log

• freecad.AppImage -c --write-log "print(2+2)" 2>&1

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  File exists and file size matches, skipping 
  File exists and file size matches, skipping 
  [... a lot more of that ...]
  qt.qpa.xcb: could not connect to display qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found. 
  This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem. 
  Available platform plugins are: eglfs, minimal, minimalegl, offscreen, vnc, webgl, xcb. 
  /tmp/appimage_extracted_8cac30c456e0f6469e8601386557085d/AppRun: line 42: 2914 Aborted ${MAIN} "$@"
  

• freecad.AppImage freecadcmd -c --write-log "print(2+2)" 2>&1

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  File exists and file size matches, skipping 
  File exists and file size matches, skipping 
  [... a lot more of that ...]
  Initialization of FreeCAD failed: While initializing FreeCAD the following exception occurred: 
  'Could not create directories. Failed with: Permission denied' Python is searching for its runtime files in the following directories:
  /tmp/appimage_extracted_8cac30c456e0f6469e8601386557085d/usr/lib/python39.zip:/tmp/appimage_extracted_8cac30c456e0f6469e8601386557085d/usr/lib/python3.9:/tmp/appimage_extracted_8cac30c456e0f6469e8601386557085d/usr/lib/python3.9/lib-dynload 
  Python version information: 3.9.13 | packaged by conda-forge | (main, May 27 2022, 17:07:55) [GCC 10.3.0] 
  The environment variable PYTHONHOME is set to '/tmp/appimage_extracted_8cac30c456e0f6469e8601386557085d/usr'. Setting this environment variable might cause Python to fail. Please contact your administrator to unset it on your system.
  

• python2 -c "print(2+2)" 2>&1

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  4
  

There seems to be no log.

[amrit3701]

• freecad.AppImage freecadcmd -c "print(2+2)"
  - from Shell
  4
  - from HTTP
  Initialization of FreeCAD failed: While initializing FreeCAD the following exception occurred: 'Could not create directories. Failed with: Permission denied' Python is searching for its runtime files in the following directories: /tmp/appimage_extracted_8cac30c456e0f6469e8601386557085d/usr/lib/python39.zip:/tmp/appimage_extracted_8cac30c456e0f6469e8601386557085d/usr/lib/python3.9:/tmp/appimage_extracted_8cac30c456e0f6469e8601386557085d/usr/lib/python3.9/lib-dynload Python version information: 3.9.13 | packaged by conda-forge | (main, May 27 2022, 17:07:55) [GCC 10.3.0] The environment variable PYTHONHOME is set to '/tmp/appimage_extracted_8cac30c456e0f6469e8601386557085d/usr'. Setting this environment variable might cause Python to fail. Please contact your administrator to unset it on your system.

Yes, these are permission errors. When you normally run freecad.AppImage freecadcmd "print(2+2)” from shell then you execute program as $USER but when you running same over HTTP request then user is www-data and freecad.AppImage freecadcmd "print(2+2)” command creates a temporary folder in /tmp path and www-data user don't have enough permissions to create that folder.

To replicate issue on command line, login to www-data user (command: su -s /bin/bash www-data), and then run freecad.AppImage freecadcmd "print(2+2)”.

I would suggest to unpack AppImage, give all required permissions and then run freecadcmd from unpacked folder. But for longer run I still suggest to use docker image as suggested by @Kunda1

Cheers!

[Kunda1]

amrit, nice to see you. One request: please try to limit the amount of text you're quoting (it makes the thread more readable). TIA

[agustavo87]

To replicate issue on command line, login to www-data user (command: su -s /bin/bash www-data), and then run freecad.AppImage freecadcmd "print(2+2)”.

Effectively, that reproduces the error. But actually I think that www-data is the user of Apache, and currently I'm using the internal PHP server via Laravel's artisan serve command. I'm not sure if I'm right in this, but if I run whoami from a HTTP request sail is the ouptut.

I would suggest to unpack AppImage, give all required permissions and then run freecadcmd from unpacked folder.

So I ran ./vendor/bin/freecad --appimage-extract and it creates a directory with the following permissions, user and group ownerships drwxr-xr-x 3 sail sail 4096 Sep 12 17:53 squashfs-root. So I change permissions with chmod -R 777 squashfs-root/. And the results are as follow

• From the shell:
  sail@85be1f090757:/var/www/html$ ./squashfs-root/AppRun freecadcmd -c "print(2+2)"

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  4

• From the HTTP:
  whoami && ../squashfs-root/AppRun freecadcmd -c "print(2+2)" 2>&1

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  sail Initialization of FreeCAD failed: Unknown runtime error occurred while initializing FreeCAD. Please contact the application's support team for more information.
  

• From the HTTP:
  whoami && ../squashfs-root/AppRun python -c "print(2+2)" 2>&1

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  sail 4
  

Thanks!

[adrianinsaval]

Use the --log-file argument to specify where to store the log file and attach the log please

[agustavo87]

Use the --log-file argument to specify where to store the log file and attach the log please

When the error occurs, there is no log file written. When it works the file is the attached: