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author | Thomas Schwinge <thomas@schwinge.name> | 2010-12-13 19:56:25 +0100 |
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committer | Thomas Schwinge <thomas@schwinge.name> | 2010-12-13 20:17:11 +0100 |
commit | cfccdc1bdbee7fb25ef0aa9639a3ffec926bf690 (patch) | |
tree | 018ecca2a0ce311c735487e485fdb92f614c781e /unix/signal.mdwn | |
parent | 8fb130c6315264ff44d86c1d06b8b2d83035bdbe (diff) |
Shuffle / create / enhance some UNIX / glibc pages.
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}}. |