From cd782d77c1e90976cb6dacf6ba78ba762f145a50 Mon Sep 17 00:00:00 2001 From: Thomas Schwinge Date: Tue, 30 Nov 2010 10:39:28 +0100 Subject: Been reading another LWN issue... --- glibc/signals.mdwn | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 glibc/signals.mdwn (limited to 'glibc/signals.mdwn') diff --git a/glibc/signals.mdwn b/glibc/signals.mdwn new file mode 100644 index 00000000..40fdc0e1 --- /dev/null +++ b/glibc/signals.mdwn @@ -0,0 +1,32 @@ +[[!meta copyright="Copyright © 2010 Free Software Foundation, Inc."]] + +[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable +id="license" text="Permission is granted to copy, distribute and/or modify this +document under the terms of the GNU Free Documentation License, Version 1.2 or +any later version published by the Free Software Foundation; with no Invariant +Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license +is included in the section entitled [[GNU Free Documentation +License|/fdl]]."]]"""]] + +*[[UNIX]] signals* are a means to asynchronously invoke a specific function +(*signal handler*). This may impact on [[system call]]s that are executing at +the same time in that they may be completely aborted, return incomplete +results, scheduled for restarting, or cause signal delivery to be blocked upon +the system call's completion. + +An explanation can be found in the relevant standards, an overview, including +UNIX signals' deficiencies is given in {{$unix#2010_brown_ghosts_3}}, for +example. + +The UNIX signalling mechanism is implemented for the GNU Hurd by means of a +separate signal-handling thread that is part of every process. This makes +handling of signals a separate thread of control. + + * [[SA_SIGINFO, SA_SIGACTION|open_issues/sa_siginfo_sa_sigaction]] + + +# External + + * {{$unix#djb_self-pipe}}. + + * {{$unix#rjk_fork}}. -- cgit v1.2.3