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[[!meta copyright="Copyright © 2009, 2010 Free Software Foundation, Inc."]]
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The [[*UNIX signalling mechanism*|unix/signal]] is implemented for the GNU Hurd
by means of a separate *signal-handling [[thread]]* that is part of every
[[process]]. This makes handling of signals a separate thread of control.
* [[SA_SIGINFO, SA_SIGACTION|open_issues/sa_siginfo_sa_sigaction]]
* Why does `kill` hang sometimes?
<youpi> kill send the signal to the process
<youpi> if the process is hung, killing waits
<youpi> signals should be just asynchronous, but apparently for some
reason Roland & co wanted some synchronization
[[!taglink open_issue_glibc]]
# Further Reading
* {{$unix#djb_self-pipe}}.
* {{$unix#rjk_fork}}.
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