[GH-ISSUE #1143] Failure to firejail a custom AppImage #790

New issue

Closed

opened 2026-05-05 06:51:20 -06:00 by gitea-mirror · 1 comment

gitea-mirror commented

2026-05-05 06:51:20 -06:00

Owner

Originally created by @ghost on GitHub (Mar 14, 2017).
Original GitHub issue: https://github.com/netblue30/firejail/issues/1143

Good morning,

I'm a Debian Jessie user and, recently, I've tried modifying a Krita AppImage to add a file to it. I was successful in generating a fully functional modified version of it, but running it under firejail returns the following error:

thoreau@user:~/Installers$ firejail --appimage krita*
Error mounting appimage: appimage.c:104 appimage_set: Invalid argument
thoreau@user:~/Installers$

The complete process I've performed form the downloaded files to their final version, I'll describe bellow:

The AppImage, I downloaded from here into my "Installers" folder, and the file I intended to add, I downloaded from here and extracted the "KritaDarker.colors" file into my "Pictures" folder.
Having the AppImageKit in my home folder, I then performed the following commands:

sudo mount /home/thoreau/Installers/krita-3.1.2-x86_64.appimage /mnt
sudo cp -r /mnt/ krita-3.1.2-x86_64.appimage
cd ~/
sudo chown -R $USER krita-3.1.2-x86_64.appimage
mv /Pictures/KritaDarker.colors krita-3.1.2-x86_64.appimage/usr/share/color-schemes/KritaDarker.colors
./appimagetool-x86_64.AppImage krita-3.1.2-x86_64.appimage
These commands I adapted from the solution presented in this [thread](https://github.com/Ultimaker/Cura/issues/847#issuecomment-285860132) which is a case similar to mine which was presented to me in the appimage IRC.

Now with the resulting appimage in hands, I tried running it, saw it worked with the intended modifications, then substituted the original appimage in the Installers folder. And then I tried using it in combination with Firejail, resulting in the error shown above.

Now we are back to where we started. Thank you for listening to my case and any help given.

Originally created by @ghost on GitHub (Mar 14, 2017). Original GitHub issue: https://github.com/netblue30/firejail/issues/1143 Good morning, I'm a Debian Jessie user and, recently, I've tried modifying a Krita AppImage to add a file to it. I was successful in generating a fully functional modified version of it, but running it under firejail returns the following error: ``` thoreau@user:~/Installers$ firejail --appimage krita* Error mounting appimage: appimage.c:104 appimage_set: Invalid argument thoreau@user:~/Installers$ ``` The complete process I've performed form the downloaded files to their final version, I'll describe bellow: 1. The AppImage, I downloaded from [here](http://download.kde.org/stable/krita/3.1.2/krita-3.1.2-x86_64.appimage) into my "Installers" folder, and the file I intended to add, I downloaded from [here](http://www.davidrevoy.com/data/documents/krita-scheme.tar.gz) and extracted the "KritaDarker.colors" file into my "Pictures" folder. 2. Having the [AppImageKit](https://github.com/probonopd/AppImageKit) in my home folder, I then performed the following commands: ``` sudo mount /home/thoreau/Installers/krita-3.1.2-x86_64.appimage /mnt sudo cp -r /mnt/ krita-3.1.2-x86_64.appimage cd ~/ sudo chown -R $USER krita-3.1.2-x86_64.appimage mv /Pictures/KritaDarker.colors krita-3.1.2-x86_64.appimage/usr/share/color-schemes/KritaDarker.colors ./appimagetool-x86_64.AppImage krita-3.1.2-x86_64.appimage These commands I adapted from the solution presented in this [thread](https://github.com/Ultimaker/Cura/issues/847#issuecomment-285860132) which is a case similar to mine which was presented to me in the appimage IRC. ``` 3. Now with the [resulting appimage](https://www.dropbox.com/s/hzflkgsr4kjao6z/krita-3.1.2-x86_64.appimage?dl=0) in hands, I tried running it, saw it worked with the intended modifications, then substituted the original appimage in the Installers folder. And then I tried using it in combination with Firejail, resulting in the error shown above. Now we are back to where we started. Thank you for listening to my case and any help given.

gitea-mirror

2026-05-05 06:51:20 -06:00

closed this issue
added the
information_old
label

gitea-mirror commented

2026-05-05 06:51:25 -06:00

Author

Owner

@netblue30 commented on GitHub (Mar 15, 2017):

It is possible AppImageKit switched the format of the archive from ISO to squashfs. Firejail version you have supports only ISO archives. Support for squashfs archives was introduced recently in firejail, and is available only here on mainline git. I would say if you install it, it should fix the problem.

@netblue30 commented on GitHub (Mar 15, 2017): It is possible AppImageKit switched the format of the archive from ISO to squashfs. Firejail version you have supports only ISO archives. Support for squashfs archives was introduced recently in firejail, and is available only here on mainline git. I would say if you install it, it should fix the problem.

gitea-mirror referenced this issue

2026-05-05 10:07:19 -06:00

[PR #790] [MERGED] Update okular.profile #3756

No milestone

No project

No assignees

1 participant

Notifications

Due date

The due date is invalid or out of range. Please use the format "yyyy-mm-dd".

No due date set.

Dependencies

No dependencies set.

Reference: github-starred/firejail#790

No description provided.

Rows
Columns