X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?a=blobdiff_plain;f=spec.html%2Fch-intro.html;fp=spec.html%2Fch-intro.html;h=c752a66e847a3296a478f3d5054ae978729cc7e3;hb=d481e8196cc08ec6761f3a26da16d1e02dbbc712;hp=0000000000000000000000000000000000000000;hpb=d3fc0b07114cea6ab2294bc6ce377bdc752a059d;p=userv.git
diff --git a/spec.html/ch-intro.html b/spec.html/ch-intro.html
new file mode 100644
index 0000000..c752a66
--- /dev/null
+++ b/spec.html/ch-intro.html
@@ -0,0 +1,32 @@
+
+User service daemon and client specification - Introduction
+
+
+
+User service daemon and client specification - chapter 1
+Introduction
+
+There is a daemon which invokes user service programs (henceforth
+`services') in response to requests by callers of a companion client
+program (henceforth the `client') and according to rules set forth in
+system-wide and user-specific configuration files. The companion
+client program is setuid root, and negotiates with the daemon through
+an AF_UNIX socket and associated objects in a system-wide
+private directory set aside for the purpose. The user who wishes the
+service to be performed and calls the client is called the `calling
+user'; the process which calls the client is called the `calling
+process'.
+
+The daemon and the client are responsible for ensuring that
+information is safely carried across the security boundary between the
+two users, and that the processes on either side cannot interact with
+each other in any unexpected ways.
+