ref: 7ae2d7eab48168c0503903fdf30004e5ce94933a
parent: 47a22cd6b3d3263203f0ab84b63b8b1450daeaf1
author: sirjofri <sirjofri@sirjofri.de>
date: Tue Sep 14 07:28:23 EDT 2021
adds intro info to sample epub, adds Plan 9 from Bell Labs paper excerpt as an example.
--- a/sample/ebooksrc/content.ncx
+++ b/sample/ebooksrc/content.ncx
@@ -7,7 +7,7 @@
<meta name="dtb:uid" content="abc"/>
</head>
<docTitle>
- <text>Sample Document</text>
+ <text>Epublish Tools</text>
</docTitle>
<docAuthor>
<text>sirjofri</text>
@@ -15,13 +15,13 @@
<navMap>
<navPoint playOrder="1" id="id1">
<navLabel>
- <text>Chapter 1</text>
+ <text>Epublish Tools</text>
</navLabel>
<content src="chap1.xhtml"/>
</navPoint>
<navPoint playOrder="2" id="id2">
<navLabel>
- <text>Chapter 2</text>
+ <text>Plan 9 from Bell Labs</text>
</navLabel>
<content src="chap2.xhtml"/>
</navPoint>
--- a/sample/ebooksrc/nav.xhtml
+++ b/sample/ebooksrc/nav.xhtml
@@ -9,9 +9,9 @@
<nav ops:type="toc">
<h1>Table of Contents</h1>
<ol>
- <li><a href="nav.xhtml">Contents</a></li>
- <li><a href="chap1.xhtml">Chapter 1</a></li>
- <li><a href="chap2.xhtml">Chapter 2</a></li>
+ <li><a href="nav.xhtml">Table of Contents</a></li>
+ <li><a href="chap1.xhtml">Epublish Tools</a></li>
+ <li><a href="chap2.xhtml">Plan 9 from Bell Labs</a></li>
</ol>
</nav>
</body>
--- a/sample/text/chap1.txt
+++ b/sample/text/chap1.txt
@@ -1,14 +1,30 @@
-Chapter 1
+Epublish Tools
-# Sample Chapter 1
+# Introduction
-Hello Chapter 1.
+This “book” describes the epublish tools for generating troff-ms compatible files as well as an EPUB 3.0 zip file using the same text source.
+The text source uses a specific input syntax similar to markdown.
+Keep in mind that this is just a short introduction and you ‥will‥ need the source for this book to understand how it works.
+It is also recommended to look at the sample/mkfile, which describes the build process of this sample book.
+
+# Source Text Syntax
+
+## Basic Text Syntax
+
+It is possible to write ‥italic‥ and ‥‥bold‥‥ text.
+You can generate the two-points character on Plan 9 using 'Alt 2.' (Alt is the compose key).
+
+## Output Format Specific Source
+
+It is possible to specify areas that remain untouched for the specified output format.
+The following example shows a bold paragraph:
+
[[[ms
.B
-MS exclusive
+MS exclusive paragraph.
.R
]]]
[[[ebook
-<p><b>ebook exclusive</b></p>
+<p><b>ebook exclusive paragraph.</b></p>
]]]
--- a/sample/text/chap2.txt
+++ b/sample/text/chap2.txt
@@ -1,5 +1,166 @@
-Chapter 2
+Plan 9 from Bell Labs
-# Hello Chapter 2
+[[[ms
+.LP
+Rob Pike
+.br
+Dave Presotto
+.br
+Sean Dorward
+.br
+Bob Flandrena
+.br
+Ken Thompson
+.br
+Howard Trickey
+.br
+Phil Winterbottom
+]]]
+[[[ebook
+<p>Rob Pike<br/>
+Dave Presotto<br/>
+Sean Dorward<br/>
+Bob Flandrena<br/>
+Ken Thompson<br/>
+Howard Trickey<br/>
+Phil Winterbottom</p>
+]]]
-Sample Chapter 2.
\ No newline at end of file
+Appeared in a slightly different form in ‥Computing Systems, Vol 8 #3, Summer 1993, pp. 221-254.‥
+
+# Motivation
+
+By the mid 1980's, the trend in computing was
+away from large centralized time-shared computers towards
+networks of smaller, personal machines,
+typically UNIX “workstations”.
+People had grown weary of overloaded, bureaucratic timesharing machines
+and were eager to move to small, self-maintained systems, even if that
+meant a net loss in computing power.
+As microcomputers became faster, even that loss was recovered, and
+this style of computing remains popular today.
+
+In the rush to personal workstations, though, some of their weaknesses
+were overlooked.
+First, the operating system they run, UNIX, is itself an old timesharing system and
+has had trouble adapting to ideas
+born after it. Graphics and networking were added to UNIX well into
+its lifetime and remain poorly integrated and difficult to administer.
+More important, the early focus on having private machines
+made it difficult for networks of machines to serve as seamlessly as the old
+monolithic timesharing systems.
+Timesharing centralized the management
+and amortization of costs and resources;
+personal computing fractured, democratized, and ultimately amplified
+administrative problems.
+The choice of
+an old timesharing operating system to run those personal machines
+made it difficult to bind things together smoothly.
+
+Plan 9 began in the late 1980's as an attempt to have it both
+ways: to build a system that was centrally administered and cost-effective
+using cheap modern microcomputers as its computing elements.
+The idea was to build a time-sharing system out of workstations, but in a novel way.
+Different computers would handle
+different tasks: small, cheap machines in people's offices would serve
+as terminals providing access to large, central, shared resources such as computing
+servers and file servers. For the central machines, the coming wave of
+shared-memory multiprocessors seemed obvious candidates.
+The philosophy is much like that of the Cambridge
+Distributed System [NeHe82].
+The early catch phrase was to build a UNIX out of a lot of little systems,
+not a system out of a lot of little UNIXes.
+
+The problems with UNIX were too deep to fix, but some of its ideas could be
+brought along. The best was its use of the file system to coordinate
+naming of and access to resources, even those, such as devices, not traditionally
+treated as files.
+For Plan 9, we adopted this idea by designing a network-level protocol, called 9P,
+to enable machines to access files on remote systems.
+Above this, we built a naming
+system that lets people and their computing agents build customized views
+of the resources in the network.
+This is where Plan 9 first began to look different:
+a Plan 9 user builds a private computing environment and recreates it wherever
+desired, rather than doing all computing on a private machine.
+It soon became clear that this model was richer
+than we had foreseen, and the ideas of per-process name spaces
+and file-system-like resources were extended throughout
+the system—to processes, graphics, even the network itself.
+
+By 1989 the system had become solid enough
+that some of us began using it as our exclusive computing environment.
+This meant bringing along many of the services and applications we had
+used on UNIX. We used this opportunity to revisit many issues, not just
+kernel-resident ones, that we felt UNIX addressed badly.
+Plan 9 has new compilers,
+languages,
+libraries,
+window systems,
+and many new applications.
+Many of the old tools were dropped, while those brought along have
+been polished or rewritten.
+
+Why be so all-encompassing?
+The distinction between operating system, library, and application
+is important to the operating system researcher but uninteresting to the
+user. What matters is clean functionality.
+By building a complete new system,
+we were able to solve problems where we thought they should be solved.
+For example, there is no real “tty driver” in the kernel; that is the job of the window
+system.
+In the modern world, multi-vendor and multi-architecture computing
+are essential, yet the usual compilers and tools assume the program is being
+built to run locally; we needed to rethink these issues.
+Most important, though, the test of a system is the computing
+environment it provides.
+Producing a more efficient way to run the old UNIX warhorses
+is empty engineering;
+we were more interested in whether the new ideas suggested by
+the architecture of the underlying system encourage a more effective way of working.
+Thus, although Plan 9 provides an emulation environment for
+running POSIX commands, it is a backwater of the system.
+The vast majority
+of system software is developed in the “native” Plan 9 environment.
+
+There are benefits to having an all-new system.
+First, our laboratory has a history of building experimental peripheral boards.
+To make it easy to write device drivers,
+we want a system that is available in source form
+(no longer guaranteed with UNIX, even
+in the laboratory in which it was born).
+Also, we want to redistribute our work, which means the software
+must be locally produced. For example, we could have used some vendors'
+C compilers for our system, but even had we overcome the problems with
+cross-compilation, we would have difficulty
+redistributing the result.
+
+This paper serves as an overview of the system. It discusses the architecture
+from the lowest building blocks to the computing environment seen by users.
+It also serves as an introduction to the rest of the Plan 9 Programmer's Manual,
+which it accompanies. More detail about topics in this paper
+can be found elsewhere in the manual.
+
+# Design
+
+The view of the system is built upon three principles.
+First, resources are named and accessed like files in a hierarchical file system.
+Second, there is a standard protocol, called 9P, for accessing these
+resources.
+Third, the disjoint hierarchies provided by different services are
+joined together into a single private hierarchical file name space.
+The unusual properties of Plan 9 stem from the consistent, aggressive
+application of these principles.
+
+A large Plan 9 installation has a number of computers networked
+together, each providing a particular class of service.
+Shared multiprocessor servers provide computing cycles;
+other large machines offer file storage.
+These machines are located in an air-conditioned machine
+room and are connected by high-performance networks.
+Lower bandwidth networks such as Ethernet or ISDN connect these
+servers to office- and home-resident workstations or PCs, called terminals
+in Plan 9 terminology.
+Figure 1 shows the arrangement.
+
+(The full paper is available in the Plan 9 sources)