https://bugs.kde.org/show_bug.cgi?id=488859
Bug ID: 488859
Summary: startProcess() can generate service names that are too
long
Classification: Frameworks and Libraries
Product: frameworks-kio
Version: 6.3.0
Platform: openSUSE
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: kio-bugs-n...@kde.org
Reporter: kde.dorsal...@passinbox.com
CC: kdelibs-b...@kde.org
Target Milestone: ---
SUMMARY
SystemdProcessRunner::startProcess() and ScopedProcessRunner::startProcess()
are generating service names including the whole escaped file name.
Systemd returns "Invalid unit name or type." when the service/unit name is
longer than 255 bytes.
This can be problematic with multi-byte characters.
With the leading "app-" and trailing "@<uuid>.service" taking 45 bytes, 210
bytes are left for the escaped file name.
For example, most CJK characters are 3 bytes long when encoded in UTF-8. These
become 12 bytes in the service name (currently it's 15 bytes because of Bug
488854).
A file name with 18 3-byte characters or more will get the "Invalid unit name
or type." error.
Is it necessary to include the whole file name? There is already the uuid part.
If it's necessary, tell the user to use a shorter file name can be helpful.
STEPS TO REPRODUCE
Execute a .desktop file with a moderately long file name, for example
"そこまで長いというわけでもないファイル名.desktop"
OBSERVED RESULT
The following error can be seen by journalctl -e
kf.kio.gui: Failed to launch process as service:
"app-\\x-1d\\x-7f\\x-63\\x-1d\\x-7f\\x-6d\\x-1d\\x-7f\\x-42\\x-1d\\x-7f\\x-59\\x-17\\x-6b\\x-49\\x-1d\\x-7f\\x-7c\\x-1d\\x-7f\\x-58\\x-1d\\x-7f\\x-7c\\x-1d\\x-7f\\x-7a\\x-1d\\x-7e\\x-71\\x-1d\\x-7f\\x-6f\\x-1d\\x-7f\\x-59\\x-1d\\x-7e\\x-7e\\x-1d\\x-7f\\x-56\\x-1d\\x-7f\\x-7c\\x-1d\\x-7d\\x-6b\\x-1d\\x-7e\\x-5f\\x-1d\\x-7e\\x-5c\\x-1d\\x-7d\\x-55\\x-1b\\x-70\\x-73@19241a262b06459c90ecaf538b57c701.service"
"org.freedesktop.DBus.Error.InvalidArgs" "Invalid unit name or type."
EXPECTED RESULT
Run the application without error.
SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20240618
KDE Plasma Version: 6.0.5
KDE Frameworks Version: 6.3.0
Qt Version: 6.7.1
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