D15984: Close unneeded FDs before startup

[Fabian Vogt]

fvogt created this revision.
fvogt added reviewers: Plasma, broulik.
Herald added a project: Plasma.
fvogt requested review of this revision.

REVISION SUMMARY
  This works around a firefox bug which causes sockets to internet addresses to
  get inherited by native host processes. Those are listed as outgoing
  connections opened by plasma-browser-integration-host in netstat/ss.
  
  CCBUG: 399449

TEST PLAN
  Checked with ss -ap | grep plasma and also
  ll /proc/$(pidof plasma-browser-integration)/fd/ after starting firefox.
  No inherited sockets anymore.

REPOSITORY
  R856 Plasma Browser Integration

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D15984

AFFECTED FILES
  host/main.cpp

To: fvogt, #plasma, broulik
Cc: plasma-devel, ragreen, Pitel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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