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https://docs.microsoft.com/windows/wsl
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Weird environment variables #10476

Open seokbeomKim opened 11 months ago

seokbeomKim commented 11 months ago

Windows Version

Microsoft Windows [Version 10.0.22621.2283]

WSL Version

1.3.17.0

Are you using WSL 1 or WSL 2?

Kernel Version

5.15.90.4-1

Distro Version

Ubuntu 22.04

Other Software

Yocto kirstone. (but this is not the main reason.)

Repro Steps

sukbeom@LAPTOP-R4FQS2C5:~$ env
'WSL_INTEROP=/run/WSL/9042_interop'
'WSL_DISTRO_NAME=Ubuntu-22.04'
'DISPLAY=:0'
'WT_SESSION=cf106072-fb2d-4b3f-88f5-2e3814c5692b'
'WT_PROFILE_ID={d7b20cea-47a9-518c-95a4-c8bd91e2e1c6}'
'WSLENV=WT_SESSION:BASH_ENV/u:WT_PROFILE_ID'
'PULSE_SERVER=unix:/mnt/wslg/PulseServer'
'PWD=/home/sukbeom'
'TERM=xterm-256color'
'WSL2_GUI_APPS_ENABLED=1'
'XDG_RUNTIME_DIR=/mnt/wslg/runtime-dir'
'WAYLAND_DISPLAY=wayland-0'
'HOSTTYPE=x86_64'
SHELL=/bin/bash
SUDO_GID=1000
WSL_DISTRO_NAME=Ubuntu-22.04

In the result of env command, there are few lines starting/ending with quote character. Even though we can get the environmental variables with 'echo $PWD', this must be fixed.

In Yocto project, commands will not normally work due to this. For example, when I do bitbake -c menuconfig linux-yocto, the command will exit without any error message. But after I do sh, bash, bitbake -c menuconfig linux-yocto again, the operation will be successful. In the working environment, those problematic variables are not defined. 

sukbeom@LAPTOP-R4FQS2C5:~$ env
SHELL=/bin/bash
SUDO_GID=1000
WSL_DISTRO_NAME=Ubuntu-22.04
SUDO_COMMAND=/usr/sbin/enter-systemd-namespace
SUDO_USER=sukbeom
PWD=/home/sukbeom
LOGNAME=sukbeom
XDG_SESSION_TYPE=tty
GIT_SSL_NO_VERIFY=1
MOTD_SHOWN=pam
HOME=/home/sukbeom
LANG=C.UTF-8
WSL_INTEROP=/run/WSL/9042_interop

Not only Yocto project, but also many other projects could face unexpected errors due to this.

Expected Behavior

All environment variables must be defined without quote(').

Actual Behavior

Some variables include quote character.

Diagnostic Logs

No response

ghost commented 11 months ago

If you're able to access these variables without a quote, meaning you can echo $WT_SESSION and see the value, then that means the quote is not in the name. Are you sure the quote is in the name?

ghost commented 11 months ago

Also would be curious to see what the output of xargs -0 -L1 -a /proc/self/environ looks like. The fact that you can read out the variables without the quote makes me question if the quote is actually in the name.

seokbeomKim commented 11 months ago

  1. Do xargs -0 -L1 -a /proc/self/environ

    sukbeom@LAPTOP-R4FQS2C5:~$ xargs -0 -L1 -a /proc/self/environ
'WSL_INTEROP=/run/WSL/1540_interop'
'WSL_DISTRO_NAME=Ubuntu-22.04'
'DISPLAY=:0'
'WT_SESSION=0389944a-6b92-4dc6-8e9b-973324383795'
'WT_PROFILE_ID={d7b20cea-47a9-518c-95a4-c8bd91e2e1c6}'
'WSLENV=WT_SESSION:BASH_ENV/u:WT_PROFILE_ID'
'PULSE_SERVER=unix:/mnt/wslg/PulseServer'
'PWD=/home/sukbeom'
'TERM=xterm-256color'
'WSL2_GUI_APPS_ENABLED=1'
'XDG_RUNTIME_DIR=/mnt/wslg/runtime-dir'
'WAYLAND_DISPLAY=wayland-0'
'HOSTTYPE=x86_64'
SHELL=/bin/bash
SUDO_GID=1000
WSL_DISTRO_NAME=Ubuntu-22.04
SUDO_COMMAND=/usr/sbin/enter-systemd-namespace
SUDO_USER=sukbeom
PWD=/home/sukbeom
LOGNAME=sukbeom
XDG_SESSION_TYPE=tty

  2. echo $WT_SESSION => Nothing shows up

    
sukbeom@LAPTOP-R4FQS2C5:~$ echo $WT_SESSION

3. Evaluate related variables:

sukbeom@LAPTOP-R4FQS2C5:~$ for l in $(env | grep -E ^\' | sed -e "s/^'(..)=../\1/g"); do echo "variable $l: " $(printenv $l); done variable WSL_INTEROP: /run/WSL/1540_interop variable WSL_DISTRO_NAME: Ubuntu-22.04 variable DISPLAY: 172.29.112.1:0.0 variable WT_SESSION: variable WT_PROFILE_ID: variable WSLENV: WT_SESSION:BASH_ENV/u:WT_PROFILE_ID variable PULSE_SERVER: variable PWD: /home/sukbeom variable TERM: xterm-256color variable WSL2_GUI_APPS_ENABLED: variable XDG_RUNTIME_DIR: /run/user/1000 variable WAYLAND_DISPLAY: variable HOSTTYPE:



4. I'd like to know where these variables are set from. Could you give me some hints to figure it out?
seokbeomKim commented 11 months ago

In the case of the variable $DISPLAY, the bash is going to set it to export DISPLAY=$(cat /etc/resolv.conf | grep nameserver | awk '{print $2; exit;}'):0.0 by my .bashrc. But.. it seems like starting WSL console is setting DISPLAY to initial value :0 containing the quote character. 

sukbeom@LAPTOP-R4FQS2C5:~$ env | grep  DISPLAY
'DISPLAY=:0'
'WAYLAND_DISPLAY=wayland-0'
DISPLAY=172.29.112.1:0.0
ghost commented 9 months ago

Sorry for the slow response. Are the environment variables always like this, from the moment you start wsl.exe?

ghost commented 9 months ago

You can use this to see how many parent processes this comes from.


#!/usr/bin/bash

pid=$$
while [ true ]; do
    echo -------- pid: $pid $(sudo cat "/proc/${pid}/cmdline" | tr -d '\0') ------------
    sudo xargs -0 -L1 -a "/proc/$pid/environ"
    echo ---------------------------------------------------------
    if [ $pid == 1 ]; then exit 0; fi
    pid=$(($(ps -o ppid= -p $pid)))
done
seokbeomKim commented 9 months ago

I will add a comment by today. Can I reopen this issue?

ghost commented 9 months ago

No worries, I re-opened it.

seokbeomKim commented 9 months ago

Are the environment variables always like this, from the moment you start wsl.exe? => Yes.

I got the output of the script and there was a point:

pid: 2366 /bin/login-p-f'DISPLAY=:0''HOSTTYPE=x86_64''PULSE_SERVER=unix:/mnt/wslg/PulseServer''PWD=/home/sukbeom''TERM=xterm-256color''WAYLAND_DISPLAY=wayland-0''WSL2_GUI_APPS_ENABLED=1''WSLENV=WT_SESSION:WT_PROFILE_ID:BASH_ENV/u''WSL_DISTRO_NAME=Ubuntu-22.04''WSL_INTEROP=/run/WSL/2406_interop''WT_PROFILE_ID={d7b20cea-47a9-518c-95a4-c8bd91e2e1c6}''WT_SESSION=4e9a7bb1-2d31-4af6-91d0-ad2b210d727e''XDG_RUNTIME_DIR=/mnt/wslg/runtime-dir' ------------

The full log: 

-------- pid: 5645 /usr/bin/bash./231108_test.sh ------------
'WSL_INTEROP=/run/WSL/2406_interop'
'WSL_DISTRO_NAME=Ubuntu-22.04'
'DISPLAY=:0'
'WT_SESSION=4e9a7bb1-2d31-4af6-91d0-ad2b210d727e'
'WT_PROFILE_ID={d7b20cea-47a9-518c-95a4-c8bd91e2e1c6}'
'WSLENV=WT_SESSION:WT_PROFILE_ID:BASH_ENV/u'
'PULSE_SERVER=unix:/mnt/wslg/PulseServer'
'PWD=/home/sukbeom'
'TERM=xterm-256color'
'WSL2_GUI_APPS_ENABLED=1'
'XDG_RUNTIME_DIR=/mnt/wslg/runtime-dir'
'WAYLAND_DISPLAY=wayland-0'
'HOSTTYPE=x86_64'
SHELL=/bin/bash
SUDO_GID=1000
WSL_DISTRO_NAME=Ubuntu-22.04
SUDO_COMMAND=/usr/sbin/enter-systemd-namespace
SUDO_USER=sukbeom
PWD=/home/sukbeom/workspace/issues/wsl_10476
LOGNAME=sukbeom
XDG_SESSION_TYPE=tty
GIT_SSL_NO_VERIFY=1
MOTD_SHOWN=pam
HOME=/home/sukbeom
LANG=C.UTF-8
WSL_INTEROP=/run/WSL/2406_interop
LS_COLORS=rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:mi=00:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arc=01;31:*.arj=01;31:*.taz=01;31:*.lha=01;31:*.lz4=01;31:*.lzh=01;31:*.lzma=01;31:*.tlz=01;31:*.txz=01;31:*.tzo=01;31:*.t7z=01;31:*.zip=01;31:*.z=01;31:*.dz=01;31:*.gz=01;31:*.lrz=01;31:*.lz=01;31:*.lzo=01;31:*.xz=01;31:*.zst=01;31:*.tzst=01;31:*.bz2=01;31:*.bz=01;31:*.tbz=01;31:*.tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.war=01;31:*.ear=01;31:*.sar=01;31:*.rar=01;31:*.alz=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.cab=01;31:*.wim=01;31:*.swm=01;31:*.dwm=01;31:*.esd=01;31:*.jpg=01;35:*.jpeg=01;35:*.mjpg=01;35:*.mjpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.webm=01;35:*.webp=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=01;35:*.ogv=01;35:*.ogx=01;35:*.aac=00;36:*.au=00;36:*.flac=00;36:*.m4a=00;36:*.mid=00;36:*.midi=00;36:*.mka=00;36:*.mp3=00;36:*.mpc=00;36:*.ogg=00;36:*.ra=00;36:*.wav=00;36:*.oga=00;36:*.opus=00;36:*.spx=00;36:*.xspf=00;36:
LESSCLOSE=/usr/bin/lesspipe %s %s
XDG_SESSION_CLASS=user
TERM=xterm-256color
LESSOPEN=| /usr/bin/lesspipe %s
USER=sukbeom
DISPLAY=172.29.112.1:0.0
SHLVL=1
XDG_SESSION_ID=2
XDG_RUNTIME_DIR=/run/user/1000
WSLENV=WT_SESSION:WT_PROFILE_ID:BASH_ENV/u
LC_ALL=en_US.UTF-8
XDG_DATA_DIRS=/usr/share/gnome:/usr/local/share:/usr/share:/var/lib/snapd/desktop
HUSHLOGIN=FALSE
BROWSER=wslview
PATH=/home/sukbeom/.local/bin:/home/sukbeom/bin:/home/sukbeom/opt/leetcode_cli:/home/sukbeom/opt/bin:/home/sukbeom/.cargo/bin:/home/sukbeom/go/bin:/home/sukbeom/.config/emacs/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/lib/wsl/lib:/mnt/c/Program Files/OpenSSH/:/mnt/c/WINDOWS/system32:/mnt/c/WINDOWS:/mnt/c/WINDOWS/System32/Wbem:/mnt/c/WINDOWS/System32/WindowsPowerShell/v1.0/:/mnt/c/Program Files/OpenSSH:/mnt/c/WINDOWS/System32/OpenSSH/:/mnt/c/Program Files/dotnet/:/mnt/c/ProgramData/chocolatey/bin:/mnt/c/Program Files/Microsoft SQL Server/120/Tools/Binn/:/mnt/c/Program Files/usbipd-win/:/mnt/c/Program Files/Git/cmd:/mnt/c/Program Files/gsudo/Current:/mnt/c/Program Files/nodejs/:/mnt/c/Program Files/PowerShell/7/:/mnt/c/Program Files (x86)/Atmel/sam-ba_2.18/drv/:/mnt/c/Program Files (x86)/Atmel/sam-ba_2.18:/mnt/c/Program Files/OpenSSH:/mnt/c/Users/chaox/AppData/Local/Microsoft/WindowsApps:/mnt/c/Users/chaox/AppData/Local/Programs/oh-my-posh/bin:/mnt/c/Users/chaox/AppData/Local/Programs/oh-my-posh/themes:/mnt/c/Users/chaox/AppData/Local/Programs/Hyper/resources/bin:/mnt/c/Program Files/qemu:/mnt/c/MentorGraphics/9.5PADS/SDD_HOME/common/win32/lib:/mnt/c/Utilities/Fwdn:/mnt/c/Users/chaox/AppData/Local/Programs/Microsoft VS Code/bin:/mnt/c/Users/chaox/AppData/Roaming/npm:/snap/bin
SUDO_UID=1000
DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
MAIL=/var/mail/sukbeom
OLDPWD=/home/sukbeom/workspace
_=./231108_test.sh
---------------------------------------------------------
-------- pid: 2402 -bash ------------
SUDO_GID=1000
WSL_DISTRO_NAME=Ubuntu-22.04
SUDO_COMMAND=/usr/sbin/enter-systemd-namespace
SUDO_USER=sukbeom
PRE_NAMESPACE_PWD=/home/sukbeom
PWD=/home/sukbeom
LOGNAME=sukbeom
LANG=C.UTF-8
WSL_INTEROP=/run/WSL/2406_interop
TERM=xterm-256color
USER=sukbeom
DISPLAY=:0
SHLVL=0
WSLENV=WT_SESSION:WT_PROFILE_ID:BASH_ENV/u
LC_ALL=en_US.UTF-8
SUDO_UID=1000
PRE_NAMESPACE_PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/lib/wsl/lib:/mnt/c/Program Files/OpenSSH/:/mnt/c/WINDOWS/system32:/mnt/c/WINDOWS:/mnt/c/WINDOWS/System32/Wbem:/mnt/c/WINDOWS/System32/WindowsPowerShell/v1.0/:/mnt/c/Program Files/OpenSSH:/mnt/c/WINDOWS/System32/OpenSSH/:/mnt/c/Program Files/dotnet/:/mnt/c/ProgramData/chocolatey/bin:/mnt/c/Program Files/Microsoft SQL Server/120/Tools/Binn/:/mnt/c/Program Files/usbipd-win/:/mnt/c/Program Files/Git/cmd:/mnt/c/Program Files/gsudo/Current:/mnt/c/Program Files/nodejs/:/mnt/c/Program Files/PowerShell/7/:/mnt/c/Program Files (x86)/Atmel/sam-ba_2.18/drv/:/mnt/c/Program Files (x86)/Atmel/sam-ba_2.18:/mnt/c/Program Files/OpenSSH:/mnt/c/Users/chaox/AppData/Local/Microsoft/WindowsApps:/mnt/c/Users/chaox/AppData/Local/Programs/oh-my-posh/bin:/mnt/c/Users/chaox/AppData/Local/Programs/oh-my-posh/themes:/mnt/c/Users/chaox/AppData/Local/Programs/Hyper/resources/bin:/mnt/c/Program Files/qemu:/mnt/c/MentorGraphics/9.5PADS/SDD_HOME/common/win32/lib:/mnt/c/Utilities/Fwdn:/mnt/c/Users/chaox/AppData/Local/Programs/Microsoft VS Code/bin:/mnt/c/Users/chaox/AppData/Roaming/npm
'DISPLAY=:0'
'HOSTTYPE=x86_64'
'PULSE_SERVER=unix:/mnt/wslg/PulseServer'
'PWD=/home/sukbeom'
'TERM=xterm-256color'
'WAYLAND_DISPLAY=wayland-0'
'WSL2_GUI_APPS_ENABLED=1'
'WSLENV=WT_SESSION:WT_PROFILE_ID:BASH_ENV/u'
'WSL_DISTRO_NAME=Ubuntu-22.04'
'WSL_INTEROP=/run/WSL/2406_interop'
'WT_PROFILE_ID={d7b20cea-47a9-518c-95a4-c8bd91e2e1c6}'
'WT_SESSION=4e9a7bb1-2d31-4af6-91d0-ad2b210d727e'
'XDG_RUNTIME_DIR=/mnt/wslg/runtime-dir'
HOME=/home/sukbeom
SHELL=/bin/bash
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
MOTD_SHOWN=pam
MAIL=/var/mail/sukbeom
XDG_SESSION_ID=2
XDG_RUNTIME_DIR=/run/user/1000
DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
XDG_SESSION_TYPE=tty
XDG_SESSION_CLASS=user
HUSHLOGIN=FALSE
---------------------------------------------------------
-------- pid: 2366 /bin/login-p-f'DISPLAY=:0''HOSTTYPE=x86_64''PULSE_SERVER=unix:/mnt/wslg/PulseServer''PWD=/home/sukbeom''TERM=xterm-256color''WAYLAND_DISPLAY=wayland-0''WSL2_GUI_APPS_ENABLED=1''WSLENV=WT_SESSION:WT_PROFILE_ID:BASH_ENV/u''WSL_DISTRO_NAME=Ubuntu-22.04''WSL_INTEROP=/run/WSL/2406_interop''WT_PROFILE_ID={d7b20cea-47a9-518c-95a4-c8bd91e2e1c6}''WT_SESSION=4e9a7bb1-2d31-4af6-91d0-ad2b210d727e''XDG_RUNTIME_DIR=/mnt/wslg/runtime-dir' ------------
SHELL=/bin/bash
SUDO_GID=1000
WSL_DISTRO_NAME=Ubuntu-22.04
SUDO_COMMAND=/usr/sbin/enter-systemd-namespace
SUDO_USER=sukbeom
PRE_NAMESPACE_PWD=/home/sukbeom
PWD=/home/sukbeom
LOGNAME=root
HOME=/root
LANG=C.UTF-8
WSL_INTEROP=/run/WSL/2406_interop
TERM=xterm-256color
USER=root
DISPLAY=:0
SHLVL=0
WSLENV=WT_SESSION:WT_PROFILE_ID:BASH_ENV/u
LC_ALL=en_US.UTF-8
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin
SUDO_UID=1000
MAIL=/var/mail/root
PRE_NAMESPACE_PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/lib/wsl/lib:/mnt/c/Program Files/OpenSSH/:/mnt/c/WINDOWS/system32:/mnt/c/WINDOWS:/mnt/c/WINDOWS/System32/Wbem:/mnt/c/WINDOWS/System32/WindowsPowerShell/v1.0/:/mnt/c/Program Files/OpenSSH:/mnt/c/WINDOWS/System32/OpenSSH/:/mnt/c/Program Files/dotnet/:/mnt/c/ProgramData/chocolatey/bin:/mnt/c/Program Files/Microsoft SQL Server/120/Tools/Binn/:/mnt/c/Program Files/usbipd-win/:/mnt/c/Program Files/Git/cmd:/mnt/c/Program Files/gsudo/Current:/mnt/c/Program Files/nodejs/:/mnt/c/Program Files/PowerShell/7/:/mnt/c/Program Files (x86)/Atmel/sam-ba_2.18/drv/:/mnt/c/Program Files (x86)/Atmel/sam-ba_2.18:/mnt/c/Program Files/OpenSSH:/mnt/c/Users/chaox/AppData/Local/Microsoft/WindowsApps:/mnt/c/Users/chaox/AppData/Local/Programs/oh-my-posh/bin:/mnt/c/Users/chaox/AppData/Local/Programs/oh-my-posh/themes:/mnt/c/Users/chaox/AppData/Local/Programs/Hyper/resources/bin:/mnt/c/Program Files/qemu:/mnt/c/MentorGraphics/9.5PADS/SDD_HOME/common/win32/lib:/mnt/c/Utilities/Fwdn:/mnt/c/Users/chaox/AppData/Local/Programs/Microsoft VS Code/bin:/mnt/c/Users/chaox/AppData/Roaming/npm
---------------------------------------------------------
-------- pid: 0 ------------
---------------------------------------------------------
-------- pid: 0 ------------
---------------------------------------------------------
-------- pid: 0 ------------
---------------------------------------------------------