\begindata{text,539466424}
\textdsversion{12}
\template{default}
\define{global
}
All messages live in a database on the Andrew File System.  The only program 
that actually accesses that database is called the \italic{messageserver}; all 
of the user interface programs, such as Messages, access messages by remote 
procedure calls to the messageserver program.  Animating the drawing below 
will show you how mail is sent through this path.


\begindata{fad,539078664}
$N icon12
$N con10
$C 30
$T 45
$L andy12b
$P 0,0,20000,256
$F
$S 67,55
Message Server
$S 219,472
Client Program
$S 51,299
Message Database (in Andrew File System)
$B 267,52 430,109
$B 36,27 203,112
$B 203,112 203,112
$B 37,122 203,202
$A 34,226 -1,76
$V 339,95 -2,77
$V 219,472 219,472
$V 298,371 298,371
$V 313,304 313,304
$V 160,285 160,285
$V 503,32 503,72
$V 503,72 615,72
$V 615,72 615,32
$V 615,32 503,32
$S 519,52
White Pages
$V 550,48 550,48
$V 329,312 329,312
$V 51,299 51,299
$S 65,146
Message Database
$V 373,170 373,224
$V 373,224 537,224
$V 537,224 537,170
$V 537,170 373,170
$S 400,188
Delivery System
$S 302,71
User Interface
$V 31,221 34,226
$S 276,89
Send
$S 276,103
Mail
$F
$S 67,55
Message Server
$S 219,472
Client Program
$S 51,299
Message Database (in Andrew File System)
$B 267,52 430,109
$B 36,27 203,112
$B 203,112 203,112
$B 37,122 203,202
$A 34,226 -1,76
$V 339,95 -2,77
$V 219,472 219,472
$V 298,371 298,371
$V 313,304 313,304
$V 160,285 160,285
$V 503,32 503,72
$V 503,72 615,72
$V 615,72 615,32
$V 615,32 503,32
$S 519,52
White Pages
$V 550,48 550,48
$V 329,312 329,312
$V 51,299 51,299
$S 65,146
Message Database
$V 373,170 373,224
$V 373,224 537,224
$V 537,224 537,170
$V 537,170 373,170
$S 400,188
Delivery System
$S 302,71
User Interface
$V 31,221 34,226
$S 276,89
Send
$S 276,103
Mail
$F
$S 67,55
Message Server
$S 219,472
Client Program
$S 51,299
Message Database (in Andrew File System)
$B 267,52 430,109
$B 36,27 203,112
$B 203,112 203,112
$B 37,122 203,202
$A 34,226 -1,76
$V 339,95 -2,77
$V 219,472 219,472
$V 298,371 298,371
$V 313,304 313,304
$V 160,285 160,285
$V 503,32 503,72
$V 503,72 615,72
$V 615,72 615,32
$V 615,32 503,32
$S 519,52
White Pages
$V 550,48 550,48
$V 329,312 329,312
$V 51,299 51,299
$S 65,146
Message Database
$V 373,170 373,224
$V 373,224 537,224
$V 537,224 537,170
$V 537,170 373,170
$S 400,188
Delivery System
$S 302,71
User Interface
$V 31,221 34,226
$F
$S 67,55
Message Server
$S 219,472
Client Program
$S 51,299
Message Database (in Andrew File System)
$B 267,52 430,109
$B 36,27 203,112
$B 203,112 203,112
$B 37,122 203,202
$A 34,226 -1,76
$V 339,95 -2,77
$V 219,472 219,472
$V 298,371 298,371
$V 313,304 313,304
$V 160,285 160,285
$V 503,32 503,72
$V 503,72 615,72
$V 615,72 615,32
$V 615,32 503,32
$S 519,52
White Pages
$V 550,48 550,48
$V 329,312 329,312
$V 51,299 51,299
$S 65,146
Message Database
$V 373,170 373,224
$V 373,224 537,224
$V 537,224 537,170
$V 537,170 373,170
$S 400,188
Delivery System
$S 302,71
User Interface
$V 31,221 34,226
$V 501,49 430,80
$F
$S 67,55
Message Server
$S 219,472
Client Program
$S 51,299
Message Database (in Andrew File System)
$B 267,52 430,109
$B 36,27 203,112
$B 203,112 203,112
$B 37,122 203,202
$A 34,226 -1,76
$V 339,95 -2,77
$V 219,472 219,472
$V 298,371 298,371
$V 313,304 313,304
$V 160,285 160,285
$V 503,32 503,72
$V 503,72 615,72
$V 615,72 615,32
$V 615,32 503,32
$S 519,52
White Pages
$V 550,48 550,48
$V 329,312 329,312
$V 51,299 51,299
$S 65,146
Message Database
$V 373,170 373,224
$V 373,224 537,224
$V 537,224 537,170
$V 537,170 373,170
$S 400,188
Delivery System
$S 302,71
User Interface
$V 31,221 34,226
$F
$S 67,55
Message Server
$S 219,472
Client Program
$S 51,299
Message Database (in Andrew File System)
$B 267,52 430,109
$B 36,27 203,112
$B 203,112 203,112
$B 37,122 203,202
$A 34,226 -1,76
$V 102,85 -2,77
$V 219,472 219,472
$V 298,371 298,371
$V 313,304 313,304
$V 160,285 160,285
$V 503,32 503,72
$V 503,72 615,72
$V 615,72 615,32
$V 615,32 503,32
$S 519,52
White Pages
$V 550,48 550,48
$V 329,312 329,312
$V 51,299 51,299
$S 65,146
Message Database
$V 373,170 373,224
$V 373,224 537,224
$V 537,224 537,170
$V 537,170 373,170
$S 400,188
Delivery System
$S 302,71
User Interface
$F
$S 67,55
Message Server
$S 219,472
Client Program
$S 51,299
Message Database (in Andrew File System)
$B 267,52 430,109
$B 36,27 203,112
$B 203,112 203,112
$B 37,122 203,202
$A 34,226 -1,76
$V 102,85 -2,77
$V 219,472 219,472
$V 298,371 298,371
$V 313,304 313,304
$V 160,285 160,285
$V 503,32 503,72
$V 503,72 615,72
$V 615,72 615,32
$V 615,32 503,32
$S 519,52
White Pages
$V 550,48 550,48
$V 329,312 329,312
$V 51,299 51,299
$S 65,146
Message Database
$V 373,170 373,224
$V 373,224 537,224
$V 537,224 537,170
$V 537,170 373,170
$S 400,188
Delivery System
$S 302,71
User Interface
$F
$S 67,55
Message Server
$S 219,472
Client Program
$S 51,299
Message Database (in Andrew File System)
$B 267,52 430,109
$B 36,27 203,112
$B 203,112 203,112
$B 37,122 203,202
$A 34,226 -1,76
$V 437,208 -2,77
$V 219,472 219,472
$V 298,371 298,371
$V 313,304 313,304
$V 160,285 160,285
$V 503,32 503,72
$V 503,72 615,72
$V 615,72 615,32
$V 615,32 503,32
$S 519,52
White Pages
$V 550,48 550,48
$V 329,312 329,312
$V 51,299 51,299
$S 65,146
Message Database
$V 373,170 373,224
$V 373,224 537,224
$V 537,224 537,170
$V 537,170 373,170
$S 400,188
Delivery System
$S 302,71
User Interface
$F
$S 67,55
Message Server
$S 219,472
Client Program
$S 51,299
Message Database (in Andrew File System)
$B 267,52 430,109
$B 36,27 203,112
$B 203,112 203,112
$B 37,122 203,202
$A 34,226 -1,76
$V 437,208 -2,77
$V 219,472 219,472
$V 298,371 298,371
$V 313,304 313,304
$V 160,285 160,285
$V 503,32 503,72
$V 503,72 615,72
$V 615,72 615,32
$V 615,32 503,32
$S 519,52
White Pages
$V 550,48 550,48
$V 329,312 329,312
$V 51,299 51,299
$S 65,146
Message Database
$V 373,170 373,224
$V 373,224 537,224
$V 537,224 537,170
$V 537,170 373,170
$S 400,188
Delivery System
$S 302,71
User Interface
$F
$S 67,55
Message Server
$S 219,472
Client Program
$S 51,299
Message Database (in Andrew File System)
$B 267,52 430,109
$B 36,27 203,112
$B 203,112 203,112
$B 37,122 203,202
$A 34,226 -1,76
$V 105,177 -2,77
$V 219,472 219,472
$V 298,371 298,371
$V 313,304 313,304
$V 160,285 160,285
$V 503,32 503,72
$V 503,72 615,72
$V 615,72 615,32
$V 615,32 503,32
$S 519,52
White Pages
$V 550,48 550,48
$V 329,312 329,312
$V 51,299 51,299
$S 65,146
Message Database
$V 373,170 373,224
$V 373,224 537,224
$V 537,224 537,170
$V 537,170 373,170
$S 400,188
Delivery System
$S 302,71
User Interface
$F
$S 67,55
Message Server
$S 219,472
Client Program
$S 51,299
Message Database (in Andrew File System)
$B 267,52 430,109
$B 36,27 203,112
$B 203,112 203,112
$B 37,122 203,202
$A 34,226 -1,76
$V 105,177 -2,77
$V 219,472 219,472
$V 298,371 298,371
$V 313,304 313,304
$V 160,285 160,285
$V 503,32 503,72
$V 503,72 615,72
$V 615,72 615,32
$V 615,32 503,32
$S 519,52
White Pages
$V 550,48 550,48
$V 329,312 329,312
$V 51,299 51,299
$S 65,146
Message Database
$V 373,170 373,224
$V 373,224 537,224
$V 537,224 537,170
$V 537,170 373,170
$S 400,188
Delivery System
$S 302,71
User Interface
$F
$S 67,55
Message Server
$S 219,472
Client Program
$S 51,299
Message Database (in Andrew File System)
$B 267,52 430,109
$B 36,27 203,112
$B 203,112 203,112
$B 37,122 203,202
$A 34,226 -1,76
$V 105,177 -2,77
$V 219,472 219,472
$V 298,371 298,371
$V 313,304 313,304
$V 160,285 160,285
$V 503,32 503,72
$V 503,72 615,72
$V 615,72 615,32
$V 615,32 503,32
$S 519,52
White Pages
$V 550,48 550,48
$V 329,312 329,312
$V 51,299 51,299
$S 65,146
Message Database
$V 373,170 373,224
$V 373,224 537,224
$V 537,224 537,170
$V 537,170 373,170
$S 400,188
Delivery System
$S 302,71
User Interface
$F
$S 67,55
Message Server
$S 219,472
Client Program
$S 51,299
Message Database (in Andrew File System)
$B 267,52 430,109
$B 36,27 203,112
$B 203,112 203,112
$B 37,122 203,202
$A 34,226 -1,76
$V 105,177 -2,77
$V 219,472 219,472
$V 298,371 298,371
$V 313,304 313,304
$V 160,285 160,285
$V 503,32 503,72
$V 503,72 615,72
$V 615,72 615,32
$V 615,32 503,32
$S 519,52
White Pages
$V 550,48 550,48
$V 329,312 329,312
$V 51,299 51,299
$S 65,146
Message Database
$V 373,170 373,224
$V 373,224 537,224
$V 537,224 537,170
$V 537,170 373,170
$S 400,188
Delivery System
$S 302,71
User Interface
$F
$S 67,55
Message Server
$S 219,472
Client Program
$S 51,299
Message Database (in Andrew File System)
$B 267,52 430,109
$B 36,27 203,112
$B 203,112 203,112
$B 37,122 203,202
$A 34,226 -1,76
$V 105,177 -2,77
$V 219,472 219,472
$V 298,371 298,371
$V 313,304 313,304
$V 160,285 160,285
$V 503,32 503,72
$V 503,72 615,72
$V 615,72 615,32
$V 615,32 503,32
$S 519,52
White Pages
$V 550,48 550,48
$V 329,312 329,312
$V 51,299 51,299
$S 65,146
Message Database
$V 373,170 373,224
$V 373,224 537,224
$V 537,224 537,170
$V 537,170 373,170
$S 400,188
Delivery System
$S 302,71
User Interface
$S 314,96
Read Mail
$F
$S 67,55
Message Server
$S 219,472
Client Program
$S 51,299
Message Database (in Andrew File System)
$B 267,52 430,109
$B 36,27 203,112
$B 203,112 203,112
$B 37,122 205,204
$A 34,226 -1,76
$V 106,79 -2,77
$V 219,472 219,472
$V 298,371 298,371
$V 313,304 313,304
$V 160,285 160,285
$V 503,32 503,72
$V 503,72 615,72
$V 615,72 615,32
$V 615,32 503,32
$S 519,52
White Pages
$V 550,48 550,48
$V 329,312 329,312
$V 51,299 51,299
$S 65,146
Message Database
$V 373,170 373,224
$V 373,224 537,224
$V 537,224 537,170
$V 537,170 373,170
$S 400,188
Delivery System
$S 302,71
User Interface
$S 314,96
Read Mail
$F
$S 67,55
Message Server
$S 219,472
Client Program
$S 51,299
Message Database (in Andrew File System)
$B 267,52 430,109
$B 36,27 203,112
$B 203,112 203,112
$B 37,122 203,202
$A 34,226 -1,76
$V 330,91 -2,77
$V 219,472 219,472
$V 298,371 298,371
$V 313,304 313,304
$V 160,285 160,285
$V 503,32 503,72
$V 503,72 615,72
$V 615,72 615,32
$V 615,32 503,32
$S 519,52
White Pages
$V 550,48 550,48
$V 329,312 329,312
$V 51,299 51,299
$S 65,146
Message Database
$V 373,170 373,224
$V 373,224 537,224
$V 537,224 537,170
$V 537,170 373,170
$S 400,188
Delivery System
$S 302,71
User Interface
$F
$S 67,55
Message Server
$S 219,472
Client Program
$S 51,299
Message Database (in Andrew File System)
$B 267,52 430,109
$B 36,27 203,112
$B 203,112 203,112
$B 37,122 203,202
$A 34,226 -1,76
$V 330,91 -2,77
$V 219,472 219,472
$V 298,371 298,371
$V 313,304 313,304
$V 160,285 160,285
$V 503,32 503,72
$V 503,72 615,72
$V 615,72 615,32
$V 615,32 503,32
$S 519,52
White Pages
$V 550,48 550,48
$V 329,312 329,312
$V 51,299 51,299
$S 65,146
Message Database
$V 373,170 373,224
$V 373,224 537,224
$V 537,224 537,170
$V 537,170 373,170
$S 400,188
Delivery System
$S 302,71
User Interface
$F
$S 67,55
Message Server
$S 219,472
Client Program
$S 51,299
Message Database (in Andrew File System)
$B 267,52 430,109
$B 36,27 203,112
$B 203,112 203,112
$B 37,122 203,202
$A 34,226 -1,76
$V 330,91 -2,77
$V 219,472 219,472
$V 298,371 298,371
$V 313,304 313,304
$V 160,285 160,285
$V 503,32 503,72
$V 503,72 615,72
$V 615,72 615,32
$V 615,32 503,32
$S 519,52
White Pages
$V 550,48 550,48
$V 329,312 329,312
$V 51,299 51,299
$S 65,146
Message Database
$V 373,170 373,224
$V 373,224 537,224
$V 537,224 537,170
$V 537,170 373,170
$S 400,188
Delivery System
$S 302,71
User Interface
$$
\enddata{fad,539078664}
\view{fadview,539078664,1507,0,268}









The structure of the system is shown in more detail, and hierarchically, in 
the following message.


\begindata{bp,537558784}
\enddata{bp,537558784}
\view{bpv,537558784,1509,0,0}
Copyright 1992 Carnegie Mellon University and IBM.  All rights reserved.

\smaller{\smaller{$Disclaimer: This software is part of version 7.2 of the 

Andrew User Interface System and is the 

property of IBM, Carnegie Mellon University, 

and the other copyright holders.  The source 

code of this version is for the sole use of 

members of the Andrew Consortium with 

memberships extending into calendar year 

1994.  This source code is not to be distributed 

to non-members of the consortium nor beyond 

a fifty-mile radius from the membership address.  

Binary object code compiled or derived from 

these sources is not to be distributed to non-

members.  Members may have additional 

distribution rights granted by prior written 

permission of Carnegie Mellon University.



IBM, CARNEGIE MELLON UNIVERSITY, 

AND THE OTHER COPYRIGHT HOLDERS

 DISCLAIM ALL WARRANTIES WITH 

REGARD TO THIS SOFTWARE, INCLUDING 

ALL IMPLIED WARRANTIES OF MERCHANT-

ABILITY AND FITNESS. IN 

NO EVENT SHALL  IBM, CARNEGIE 

MELLON UNIVERSITY, OR ANY OTHER 

COPYRIGHT HOLDER BE LIABLE FOR 

ANY SPECIAL, INDIRECT OR CONSE-

QUENTIAL DAMAGES OR ANY DAMAGES 

WHATSOEVER RESULTING FROM LOSS OF

USE, DATA OR PROFITS, WHETHER IN AN

ACTION OF CONTRACT, NEGLIGENCE OR

OTHER TORTIOUS ACTION, ARISING OUT 

OF OR IN CONNECTION WITH THE USE OR

PERFORMANCE OF THIS SOFTWARE.

 $

}}\enddata{text,539466424}
