D5589: [helper] Terminate xclipboardsyncer if kwin_wayland goes down

[Martin Gräßlin]

graesslin created this revision.
Restricted Application added a project: KWin.
Restricted Application added subscribers: kwin, plasma-devel.

REVISION SUMMARY
  Normally the xclipboardsyncer should terminate because the socket
  becomes unusable. But we have reports of it not really going down and
  running amok.
  
  In order to prevent such situations this change registers SIGTERM to be
  sent to xclipboardsyncer when the parent process (that is kwin_wayland)
  dies in whatever way. This ensures that xclipboardsyncer cannot become
  an orphan.
  
  BUG: 371862

TEST PLAN
  Only compile tested, no way to get into the problematic situation

REPOSITORY
  R108 KWin

BRANCH
  xclipboardsync-pdeathsig

REVISION DETAIL
  https://phabricator.kde.org/D5589

AFFECTED FILES
  CMakeLists.txt
  config-kwin.h.cmake
  helpers/xclipboardsync/main.cpp

To: graesslin, #kwin, #plasma
Cc: plasma-devel, kwin, spstarr, progwolff, Zren, lesliezhai, ali-mohamed, hardening, jensreuterberg, abetts, sebas, apol, lukas
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