Does the "-x" option of busybox pkill really work?

[MochiMoppel]

According to the documentation pkill -x <processname> should terminated all processes with the exact name (not substring) <processname>.

This works for the full version of pgrep/pkill, but I can't make it work for the busybox implementation of pkill. Does this work for anybody or is it just me?
Following example code opens two dialogs. After 2sec the "Hello" dialog is supposed to close, but it doesn't:

Code: Select all

xmessage Hello & gxmessage World & sleep 2 ; busybox pkill -x xmessage

[perdido]

Hi MochiMoppel,

Window closed as expected in upup bionic 18.05
BusyBox v1.28.3

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Did not work in precise 5.71
BusyBox v1.21.0
pkill is in the "currently defined functions" but did not close the box.

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[MochiMoppel]

Thanks perdido,

seems to confirm that BusyBox v1.21.0 is broken.
I also tested pgrep and - no surprise - found that it doesn't work as well.

[HerrBert]

Not sure, if it belongs here or if it's of any interest...

busybox fuser in busybox v1.23.1 (slacko 6.3.2) seems to be broken too.

found this because pup_event_frontend tries to use it in /usr/local/bin/drive_all (which becomes /root/.pup_event/drive_sda(something)/AppRun), but returns an error with the option -v -m, as in mentioned script, and just nothing with option -m, though there are open files and mounted sfs's from that mountpoint.

Also, busybox acpid doesn't recognize the LID switch on my (various) net-/notebooks (busybox v1.21.0 on slacko 5.7.0 and v1.23.1).

[MochiMoppel]

busybox fuser in busybox v1.23.1 (slacko 6.3.2) seems to be broken too.

pkill -x in v1.23.1 works or does not work?

[HerrBert]

pkill -x in v1.23.1 works or does not work?

works

[MochiMoppel]

thanks