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authorThomas Schwinge <thomas@schwinge.name>2010-11-29 13:41:16 +0100
committerThomas Schwinge <thomas@schwinge.name>2010-11-29 13:41:16 +0100
commit38368072b37bf73dda26dac536e4aa6cf13c67e4 (patch)
tree383fb519f01899f394dafb52052227773a31e964 /system_call.mdwn
parent6de855d9a8f8c25ffe6ad118012bd9a74e6c13fe (diff)
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+[[!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]]."]]"""]]
+
+In an [[UNIX]]-like system, a *system call* (*syscall*) is used to request all
+kinds of functionality from the operating system kernel.
+
+A [[microkernel]]-based system typically won't offer a lot of system calls --
+apart from one central one, and that is *send message* -- but instead [[RPC]]s
+will be used instead.
+
+In the [[GNU Hurd|hurd]], a lot of what is traditionlly considered to be a UNIX
+system call is implemented (primarily by means of [[RPC]]) inside [[glibc]].