Potential regression in the document portal

[sonnyp]

Operating System

Fedora

XDG Desktop Portal version

1.18

XDG Desktop Portal version (Other)

1.18.2

Desktop Environment

GNOME

Desktop Environment (Other)

No response

Expected Behavior

rust works fine in the document portal

Current Behavior

rustc throws fs related errors such as

error: couldn't get the current directory of the process

Caused by:
  No such file or directory (os error 2)

or

error: Current directory is invalid: No such file or directory (os error 2)

error: could not compile `demo` (lib) due to previous error

Steps to Reproduce

1. Install Workbench
2. Open the Library
3. Select the "Welcome" entry in Rust
4. Make a change to a string or something
5. Close window, it will prompt to save the project, do so
6. In Workbench menu, open the project with "Open Project"
7. Press Run

If you reproduce the issue, it will happen until reboot.
A reboot might solve it

Anything else we should know?

Reproducible with: 1.18.2
Not reproducible with 1.18.0

[Mikenux]

I installed Workbench (via Software) and launched it, but had to install the Rust extensions. I installed the extensions, then closed Workbench, restarted it, and no reproduction. I uninstalled by deleting data (via Software), except Rust extensions. I reinstalled it and no reproduction.

[hfiguiere]

I can't reproduce with these steps.

I run xdg-document-portal 1.18.2 from Fedora.

[hfiguiere]

Above I saved the project.

When I re-open it and press "Run" I can reproduce.

[hfiguiere]

The error:

  Downloaded 166 crates (10.5 MB) in 1.79s (largest was `linux-raw-sys` at 1013.8 KB)
   Compiling demo v1.0.0 (/run/flatpak/doc/265c72bf/TestWorkbenchRust)
error: Current directory is invalid: No such file or directory (os error 2)

error: could not compile `demo` (lib) due to previous error

[Mikenux]

I can also reproduce by saving the project. Notice that the path to the folder is /run/flatpak/doc/... which does not exist, while the same path (after the /doc) exists in /run/user/1000/doc.

[sonnyp]

@Mikenux

I can also reproduce by saving the project. Notice that the path to the folder is /run/flatpak/doc/... which does not exist, while the same path (after the /doc) exists in /run/user/1000/doc.

/run/flatpak/doc is the document portal path from within the sandbox. See

sonny@porygon > flatpak run --command="bash" re.sonny.Workbench
[📦 re.sonny.Workbench ~]$ ls /run/flatpak/doc/

@hfiguiere ha yes of course I forgot the steps to save the project and reopen to make use of the document portal. I updated the instructions. Thanks for catching.

I haven't been able to reproduce the problem with the previous version of xdg-desktop-portal (1.18.0)

[hfiguiere]

The funny thing is that while I get the error, if I flatpak enter I can access all the files in question.

[hfiguiere]

The fatal call is in cargo:

getcwd(0x562ca5f7ee10, 512)             = -1 ENOENT (No such file or directory)

This mean it has been unlinked.

[hfiguiere]

All you need is to use this small reproducer:

#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>

int main(int, char**) {
	char cwd[4096];

	char* r = getcwd(cwd, 4096);

	printf("CWD = %s\n", r);

	return 0;
}

It will print NULL on a failure.

[hfiguiere]

$ ls -l /proc/self/cwd
lrwxrwxrwx. 1 hub hub 0 Dec  5 21:37 /proc/self/cwd -> '/run/user/1000/doc/by-app/re.sonny.Workbench/265c72bf/TestWorkbenchRust (deleted)'