Crashes on start on OS Gentoo stable

[wofwofwof]

Describe the bug
When running

To Reproduce

1. Build as normal user with: cargo install sniffnet
2. run with: sudo /home/myuser/.cargo/bin/sniffnet

error: XDG_RUNTIME_DIR is invalid or not set in the environment.
thread 'main' panicked at 'called `Option::unwrap()` on a `None` value', /home/myuser/.cargo/registry/src/github.com-1ecc6299db9ec823/wgpu-core-0.12.2/src/hub.rs:960:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Expected behavior
Sniffnet is starting

Desktop (please complete the following information):

• OS: Gentoo stable

Additional context

% cargo install sniffnet                                                                                                                                                                                              (16:28 22.11.22)(0)
    Updating crates.io index
  Downloaded sniffnet v1.0.0
  Downloaded 1 crate (4.3 MB) in 2.74s
  Installing sniffnet v1.0.0
  Downloaded ahash v0.7.6
  Downloaded parking_lot v0.11.2
  Downloaded parking_lot_core v0.8.5
  Downloaded plotters-backend v0.3.4
  Downloaded pathfinder_geometry v0.5.1
  Downloaded plotters v0.3.4
  Downloaded same-file v1.0.6
  Downloaded static_assertions v1.1.0
  Downloaded rayon-core v1.10.1
  Downloaded lyon v0.17.10
  Downloaded ttf-parser v0.17.1
  Downloaded walkdir v2.3.2
  Downloaded lyon_algorithms v0.17.7
  Downloaded lyon_geom v0.17.7
  Downloaded plotters-iced v0.3.3
  Downloaded lyon_path v0.17.7
  Downloaded linked-hash-map v0.5.6
  Downloaded libloading v0.7.4
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  Downloaded thousands v0.2.0
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  Downloaded arrayvec v0.5.2
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  Downloaded memoffset v0.6.5
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  Downloaded glyph_brush_draw_cache v0.1.5
  Downloaded gpu-alloc v0.5.3
  Downloaded gpu-descriptor-types v0.1.1
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  Downloaded iced_style v0.4.0
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  Downloaded raw-window-handle v0.4.3
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  Downloaded ab_glyph v0.2.18
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  Downloaded iced_graphics v0.3.1
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  Downloaded etherparse v0.12.0
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  Downloaded rayon v1.6.0
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  Downloaded rustc-hash v1.1.0
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  Downloaded pcap v0.11.0
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  Downloaded profiling v1.0.7
  Downloaded spirv v0.2.0+1.5.4
  Downloaded plotters-bitmap v0.3.2
  Downloaded ash v0.34.0+1.2.203
  Downloaded window_clipboard v0.2.3
  Downloaded wgpu v0.12.0
  Downloaded iced v0.4.2
  Downloaded memmap2 v0.5.8
  Downloaded ordered-float v3.4.0
  Downloaded memmap2 v0.3.1
  Downloaded gif v0.11.4
  Downloaded miniz_oxide v0.6.2
  Downloaded jpeg-decoder v0.3.0
  Downloaded wayland-cursor v0.29.5
  Downloaded nix v0.22.3
  Downloaded yeslogic-fontconfig-sys v3.2.0
  Downloaded wgpu-types v0.12.0
  Downloaded semver v0.11.0
  Downloaded png v0.17.7
  Downloaded x11rb v0.9.0
  Downloaded pest v2.4.1
  Downloaded smithay-client-toolkit v0.16.0
  Downloaded twox-hash v1.6.3
  Downloaded smithay-clipboard v0.6.6
  Downloaded ucd-trie v0.1.5
  Downloaded weezl v0.1.7
  Downloaded xi-unicode v0.3.0
  Downloaded svg_fmt v0.4.1
  Downloaded naga v0.8.5
  Downloaded winit v0.26.1
  Downloaded freetype-sys v0.13.1
  Downloaded 157 crates (12.4 MB) in 1.68s (largest was `freetype-sys` at 1.9 MB)
   Compiling autocfg v1.1.0
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   Compiling xml-rs v0.8.4
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   Compiling profiling v1.0.7
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   Compiling iced_winit v0.4.0
   Compiling wgpu v0.12.0
   Compiling wgpu_glyph v0.16.0
   Compiling iced_wgpu v0.5.1
   Compiling iced v0.4.2
   Compiling sniffnet v1.0.0
    Finished release [optimized] target(s) in 3m 40s
  Installing /home/myuser/.cargo/bin/sniffnet
   Installed package `sniffnet v1.0.0` (executable `sniffnet`)```

[GyulyVGC]

Try with

echo "XDG_RUNTIME_DIR=/run/user/<YOURID>" >> ~/.pam_environment

where <YOURID> is the output of id -u

[wofwofwof]

Hello GyulyVGC,

thank you very much for your help.

I've tried:

% sudo sh -c "id -u; echo "XDG_RUNTIME_DIR=/run/user/0"; /home/myuser/.cargo/bin/sniffnet"
0
XDG_RUNTIME_DIR=/run/user/0
error: XDG_RUNTIME_DIR is invalid or not set in the environment.
thread 'main' panicked at 'called `Option::unwrap()` on a `None` value', /home/myuser/.cargo/registry/src/github.com-1ecc6299db9ec823/wgpu-core-0.12.2/src/hub.rs:960:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
% cat ~/.pam_environment
XDG_RUNTIME_DIR=/run/user/0

I also tried to set the uid to 1000 as this is my user without sudo, but the result is the same. I've also tried to set the .pam_environment to /root/.pam_environment, but it doesn't work, too.

[GyulyVGC]

Looking online I saw a bunch of discussions mentioning this problem, try checking this one for instance.

Keep me updated!

[wofwofwof]

Hello GyulyVGC,

The thread you've linked seems to have the problem of missing entries for the XDG_RUNTIME_DIR variable.
I've tried a few things:

% sudo bash
# export XDG_RUNTIME_DIR=/run/user/0
# RUST_BACKTRACE=full /home/myuser/.cargo/bin/sniffnet
thread 'main' panicked at 'called `Option::unwrap()` on a `None` value', /home/myuser/.cargo/registry/src/github.com-1ecc6299db9ec823/wgpu-core-0.12.2/src/hub.rs:960:9
stack backtrace:
   0:     0x5578cd61d2c0 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h591808416c41e0db
   1:     0x5578cd3b06be - core::fmt::write::h32120f18eb099fb0
   2:     0x5578cd5f4c04 - std::io::Write::write_fmt::h5120f968441dcf61
   3:     0x5578cd61e6e3 - std::panicking::default_hook::{{closure}}::ha3b399c84dfd3950
   4:     0x5578cd61e39b - std::panicking::default_hook::h23c1de61997507b7
   5:     0x5578cd59132e - sniffnet::main::{{closure}}::h2c85f031d1de39f3
   6:     0x5578cd61f37b - std::panicking::rust_panic_with_hook::hf54f54e71167af35
   7:     0x5578cd61f1b3 - std::panicking::begin_panic_handler::{{closure}}::h507de2259e8e1ea3
   8:     0x5578cd61f14c - std::sys_common::backtrace::__rust_end_short_backtrace::h9db799e5e5917087
   9:     0x5578cd61f121 - rust_begin_unwind
  10:     0x5578cd313db2 - core::panicking::panic_fmt::h597fac4e15471a4b
  11:     0x5578cd313eac - core::panicking::panic::h1f1b2313b7733f31
  12:     0x5578cd53e552 - futures_executor::local_pool::block_on::h5e774598ae7dfe12
  13:     0x5578cd34c218 - iced_winit::application::run::he46ceeedf6e69262
  14:     0x5578cd5903f6 - sniffnet::main::h741f633be61b02cc
  15:     0x5578cd5a7b83 - std::sys_common::backtrace::__rust_begin_short_backtrace::h74c5e3cdc50ff1e7
  16:     0x5578cd58f06c - main
  17:     0x7f69ad5e634c - <unknown>
  18:     0x7f69ad5e63fc - __libc_start_main
  19:     0x5578cd33bac1 - _start
  20:                0x0 - <unknown>

Do you have any other idea how I can debug that problem?

Thank you very much.

[GyulyVGC]

In the next days I'll do more careful researches.

In the meantime, let me know if you manage to fix the issue.

[GyulyVGC]

Can you try doing sudo apt-get install xdg-utils --fix-missing, closing the shell and opening Sniffnet from a new shell?

Also try checking issue #23. It has the same error message when trying to push a button after the application is started. I don’t think it’s much related even if the error is the same, but who knows.

[wofwofwof]

Can you try doing sudo apt-get install xdg-utils --fix-missing, closing the shell and opening Sniffnet from a new shell?

I've reinstalled xdg-utils (emerge -av xdg-utils as it is gentoo) and opened a new shell but it doesn't change anything.

Also try checking issue #23. It has the same error message when trying to push a button after the application is started. I don’t think it’s much related even if the error is the same, but who knows.

I don't think the problem is with xdg-utils. If I use

export XDG_RUNTIME_DIR=/run/user/0

the XDG_RUNTIME_DIR is not shown anymore. I still get only a glimps of the frame of the application, and then it crashes with the above error message. The libpcap-dev is installed. Is there a dependency that you use for the graphic that is missing? As I use gentoo and not a debian distribution maybe there is some difference here?

[GyulyVGC]

Actually yes and that may be the problem.
The GUI library I used relies on wgpu and here you can find the supported platforms.

[wofwofwof]

Hello GyulyVGC,

thanks a lot for your help, now it works.

I think the reason for the crash was that vulkan was installed, but not with support for X. I think wgpu has only detected the vulkan driver but not that it doesn't work so it hasn't used OpenGL. After adding "media-libs/vulkan-loader X" to my use flags it starts and works. For the start the XDG_RUNTIME_DIR doesn't matter.