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Added a SIGTTOU block check in SetForegroundProcessGroup

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gystemd
2021-08-17 23:40:25 +02:00
parent a5f2ef66d3
commit 482de52b60
1 changed files with 7 additions and 4 deletions
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pkg/sentry/kernel/thread_group.go
+7 -4
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@@ -511,10 +511,13 @@ func (tg *ThreadGroup) SetForegroundProcessGroup(tty *TTY, pgid ProcessGroupID)
return -1, linuxerr.EPERM
}
sa:= tg.signalHandlers.actions[linux.SIGTTOU]
//if the calling process is a member of a background group, a SIGTTOU
//signal is sent to all members of this background process group.
if tg.processGroup.id != tg.processGroup.session.foreground.id && sa.Handler!=linux.SIG_IGN{
signalAction:= tg.signalHandlers.actions[linux.SIGTTOU]
// If the calling process is a member of a background group, a SIGTTOU
// signal is sent to all members of this background process group.
// We need also need to check whether it is ignoring or blocking SIGTTOU.
ignored:= signalAction.Handler == linux.SIG_IGN
blocked:= tg.leader.signalMask == linux.SignalSetOf(linux.SIGTTOU)
if tg.processGroup.id != tg.processGroup.session.foreground.id && !ignored && !blocked{
tg.leader.sendSignalLocked(SignalInfoPriv(linux.SIGTTOU),true)
}