Possible missing of environment variables for drun started process

[sinsong]

I am using rofi at archlinux, possible last update at 2025-01-04 19:45 UTC cause telegram-desktop ui font wired and cannot use IME(input method).

It is easy to suspect missing of environment variable for IME, such as GTK_IM_MODULE, QT_IM_MODULE.

But for font selection problem I have no idea about it.

Maybe the way of starting process used by rofi have changed, but I could not find that, so I make a new discussion here for help. And I wonder why systemd exec appear here.

FYI, I have simplily compared environment of application started by xfce menu and rofi:

--- tg-xfce.txt	2025-01-10 16:26:55.803124282 +0800
+++ tg-rofi.txt	2025-01-10 16:27:34.466698716 +0800
@@ -1,32 +1,21 @@
-CUDA_PATH=/opt/cuda
-DBUS_SESSION_BUS_ADDRESS=***
-DEBUGINFOD_URLS=https://debuginfod.archlinux.org 
+DBUS_SESSION_BUS_ADDRESS=***
+DBUS_STARTER_ADDRESS=***
+DBUS_STARTER_BUS_TYPE=session
 DESKTOP_SESSION=xfce
-DISPLAY=:0.0
-EDITOR=/usr/bin/vim
-GTK_IM_MODULE=fcitx
-GTK_MODULES=canberra-gtk-module:canberra-gtk-module
-HG=/usr/bin/hg
+DISPLAY=:0
 HOME=/home/<myname>
-LANG=zh_CN.UTF-8
-LANGUAGE=zh_CN:en_US:C
-LC_COLLATE=C
-LC_TIME=C
+LANG=en_US.UTF-8
 LOGNAME=<myname>
 MAIL=***
-MOTD_SHOWN=***
-NVCC_CCBIN=/usr/bin/g++-13
-PANEL_GDK_CORE_DEVICE_EVENTS=***
-PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/opt/cuda/bin:/opt/cuda/nsight_compute:/opt/cuda/nsight_systems/bin:/var/lib/flatpak/exports/bin:/usr/lib/jvm/default/bin:/usr/bin/site_perl:/usr/bin/vendor_perl:/usr/bin/core_perl
-PWD=/home/<myname>
-QT_IM_MODULE=fcitx
-QT_LOGGING_RULES=*=false
-SESSION_MANAGER=***
+MANAGERPID=***
+MEMORY_PRESSURE_WATCH=***
+MEMORY_PRESSURE_WRITE=***
+PATH=/usr/local/bin:/usr/bin
 SHELL=/bin/bash
-SHLVL=***
-SSH_AGENT_PID=***
 SSH_AUTH_SOCK=***
+SYSTEMD_EXEC_PID=***
 USER=<myname>
+XAUTHLOCALHOSTNAME=
 XAUTHORITY=***
 XDG_CACHE_HOME=/home/<myname>/.cache
 XDG_CONFIG_DIRS=/etc/xdg
@@ -42,5 +31,3 @@
 XDG_SESSION_ID=***
 XDG_SESSION_PATH=***
 XDG_SESSION_TYPE=x11
-XDG_VTNR=***
-XMODIFIERS=@im=fcitx

[DaveDavenport]

It now launches desktop files that indicate this via DBusActivation, this might change how things are launched and with what environment.
This seems to be more 'correct' and fixes some issues of launching desktop files without 'Exec' field.
In the next release an option to disable this exists.

[sinsong]

Thanks a lot. You are right. I simply bisect 1.7.6 to HEAD and got this:

b955b9aff94f3685b6fd69ba08aec47f449520e1 is the first bad commit
commit b955b9aff94f3685b6fd69ba08aec47f449520e1 (HEAD)
Author: Qball Cow <qball@blame.services>
Date:   2024-12-29 10:26:39 +0100

    [DRun] If indicated by .desktop file, launch via dbus activation.
    
    fixes: #1924

 source/helper.c     |   8 ++---
 source/modes/drun.c | 119 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-------
 2 files changed, 112 insertions(+), 15 deletions(-)

I have never used bisect before, it is my first time. Sorry for late.

Thanks again for your reply!

[DaveDavenport]

I am a bit confused why the bisect? I mentioned this change was made, if you wanted to know the exact commit, you could have asked.

[DaveDavenport]

https://wiki.archlinux.org/title/Systemd/User#Environment_variables

This shows how to fix your environment.