wl-copy dumped core when triggered from Plasma custom shortcuts

[ybrock]

Hi,

I'm trying to put a string in my clipboard when I press some special keys combination.
For this I use KDE Plasma custom keyboard shortcuts (Settings / Shortcuts) to call a script when I press, for example, Ctrl+Shift+F11.

The sript contains only this :

echo "Hello $(date)" | /usr/bin/wl-copy

It does not work, and journalctl displays this :

Dec 27 11:36:48 miseriez kwin_wayland[1702]: kf.service.services: The desktop entry file "/usr/share/applications/org.freedesktop.Xwayland.desktop" has Type= "Application" but has no Exec field.
Dec 27 11:36:48 miseriez kwin_wayland[1702]: kf.service.services: The desktop entry file "/usr/share/applications/logmgr.desktop" has Type= "Application" but has no Exec field.
Dec 27 11:36:48 miseriez kstart5[47378]: Omitting both --window and --windowclass arguments is not recommended
Dec 27 11:36:48 miseriez kwin_wayland_wrapper[47390]: wl-clipboard has been launched with a closed standard file descriptor. This is a bug in the software that has launched wl-clipboard. Aborting.
Dec 27 11:36:48 miseriez audit[47390]: ANOM_ABEND auid=1000 uid=1000 gid=1000 ses=3 subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 pid=47390 comm="wl-copy" exe="/usr/bin/wl-copy" sig=6 res=1
Dec 27 11:36:48 miseriez audit: BPF prog-id=159 op=LOAD
Dec 27 11:36:48 miseriez audit: BPF prog-id=160 op=LOAD
Dec 27 11:36:48 miseriez audit: BPF prog-id=161 op=LOAD
Dec 27 11:36:48 miseriez systemd[1402]: Started app-clip0.sh-9c4d567d871f4eb98c0cc056bd63abc2.scope - /home/yvan/bin/clip0.sh.
Dec 27 11:36:48 miseriez systemd[1]: Started [email protected] - Process Core Dump (PID 47392/UID 0).
Dec 27 11:36:48 miseriez audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=systemd-coredump@12-47392-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
Dec 27 11:36:48 miseriez systemd-coredump[47393]: [🡕] Process 47390 (wl-copy) of user 1000 dumped core.
                                                  
                                                  Module libffi.so.8 from rpm libffi-3.4.4-4.fc39.x86_64
                                                  Module libwayland-client.so.0 from rpm wayland-1.22.0-2.fc39.x86_64
                                                  Module wl-copy from rpm wl-clipboard-2.2.0-1.fc39.x86_64
                                                  Stack trace of thread 47390:
                                                  #0  0x00007f727cbf4834 __pthread_kill_implementation (libc.so.6 + 0x90834)
                                                  #1  0x00007f727cba28ee raise (libc.so.6 + 0x3e8ee)
                                                  #2  0x00007f727cb8a8ff abort (libc.so.6 + 0x268ff)
                                                  #3  0x000055b3dce67f00 main (wl-copy + 0x5f00)
                                                  #4  0x00007f727cb8c14a __libc_start_call_main (libc.so.6 + 0x2814a)
                                                  #5  0x00007f727cb8c20b __libc_start_main@@GLIBC_2.34 (libc.so.6 + 0x2820b)
                                                  #6  0x000055b3dce68c35 _start (wl-copy + 0x6c35)
                                                  ELF object binary architecture: AMD x86-64
Dec 27 11:36:48 miseriez kwin_wayland_wrapper[47388]: /home/yvan/bin/clip0.sh: line 4: 47389 Done                    echo "Hello $(date)"
Dec 27 11:36:48 miseriez kwin_wayland_wrapper[47388]:      47390 Aborted                 (core dumped) | /usr/bin/wl-copy
Dec 27 11:36:48 miseriez systemd[1]: [email protected]: Deactivated successfully.
Dec 27 11:36:48 miseriez audit[1]: SERVICE_STOP pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=systemd-coredump@12-47392-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
Dec 27 11:36:48 miseriez audit: BPF prog-id=161 op=UNLOAD
Dec 27 11:36:48 miseriez audit: BPF prog-id=160 op=UNLOAD
Dec 27 11:36:48 miseriez audit: BPF prog-id=159 op=UNLOAD
Dec 27 11:36:49 miseriez abrt-server[47405]: Deleting problem directory ccpp-2023-12-27-11:36:48.710434-47390 (dup of ccpp-2023-12-27-11:21:22.466982-44989)
Dec 27 11:36:49 miseriez abrt-applet[2242]: g_app_info_should_show: assertion 'G_IS_APP_INFO (appinfo)' failed
Dec 27 11:36:49 miseriez abrt-notification[47447]: [🡕] Process 44989 (wl-copy) crashed in main()

It seems something is wrong here

Kind regards

[bugaevc]

Hi,

this is a known issue with KDE shortcuts (see #153 (comment), #201), which is tracked at https://bugs.kde.org/show_bug.cgi?id=469328.

KDE launches your script with closed stdio fds, which is absolutely unsupported by, and will silently and subtly break, like 99.9% of Unix software. wl-clipboard in particular got bitten by this in the past (see the original report in #153), so it now contains the logic to detect this case and abort, instead of trying to proceed and subsequently breaking in mysterious ways.

In fact, wl-clipboard tells you that it has detected this, and that this is an issue with KDE and not with wl-clipboard itself, here it is in your log:

Dec 27 11:36:48 miseriez kwin_wayland_wrapper[47390]: wl-clipboard has been launched with a closed standard file descriptor. This is a bug in the software that has launched wl-clipboard. Aborting.

Please give me feedback on that message — it is not clear enough? Why did you report this to me, instead of to KDE?

[ybrock]

Hello bugaevc,

Thank you for the explaination and quick reply. I understand this is a KDE bug.

Regards