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| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2011-01-09 23:34:42 +0100 |
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| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2011-01-09 23:34:42 +0100 |
| commit | f3df65ce34153357d28bee621bdf49b61e68b182 (patch) | |
| tree | 25ac416b157b010ca2f942dac5c5ba0b38a924ac /unix/signal.mdwn | |
| parent | 09184ae09c44c052a207aa5c6dc8ce9cf61a343f (diff) | |
| parent | 3bbe62327128ce85829a4cb2fb429bd8f21b4d75 (diff) | |
Merge branch 'master' of flubber:~hurd-web/hurd-web
Diffstat (limited to 'unix/signal.mdwn')
| -rw-r--r-- | unix/signal.mdwn | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/unix/signal.mdwn b/unix/signal.mdwn new file mode 100644 index 00000000..0d038a45 --- /dev/null +++ b/unix/signal.mdwn @@ -0,0 +1,34 @@ +[[!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*) in a [[process]]. It's a rather limited for of doing +[[IPC]]. + +Signalling 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 {{$unix#2010_brown_ghosts_3}}, for +example. + +In a GNU/Hurd system, the signalling system is [[implemented in +glibc|glibc/signal]]. + + +# Further Reading + + * [[!wikipedia Signal_(computing)]] + + * {{$unix#djb_self-pipe}}. + + * {{$unix#rjk_fork}}. |