newxml/chapter06/ed.xml

   1 <?xml version="1.0" encoding="ISO-8859-1"?>
   2 <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
   3   <!ENTITY % general-entities SYSTEM "../general.ent">
   4   %general-entities;
   5 ]>
   6 <sect1 id="ch-system-ed" xreflabel="Ed">
   7 <title>Ed-&ed-version;</title>
   8 <?dbhtml filename="ed.html"?>
   9
  10 <indexterm zone="ch-system-ed"><primary sortas="a-Ed">Ed</primary></indexterm>
  11
  12 <para>The Ed package contains a spartan line editor.</para>
  13
  14 <screen>&buildtime; 0.1 SBU
  15 &diskspace; 3.1 MB</screen>
  16
  17 <para>Ed installation depends on: Bash, Binutils, Coreutils, Diffutils, GCC,
  18 Glibc, Grep, Make, Sed.</para>
  19
  20
  21
  22 <sect2>
  23 <title>Installation of Ed</title>
  24
  25 <note><para>Ed isn't something which many people use. It's installed here
  26 because it can be used by the patch program if you encounter an ed-based patch
  27 file. This happens rarely because diff-based patches are preferred these
  28 days.</para></note>
  29
  30 <para>Ed normally uses the <emphasis>mktemp</emphasis> function to create
  31 temporary files in <filename class="directory">/tmp</filename>, but this
  32 function contains a vulnerability (see the section on Temporary Files in <ulink
  33 url="http://en.tldp.org/HOWTO/Secure-Programs-HOWTO/avoid-race.html"/>). Apply
  34 the following patch to make Ed use <emphasis>mkstemp</emphasis> instead, a
  35 secure way to create temporary files:</para>
  36
  37 <screen><userinput>patch -Np1 -i ../ed-&ed-version;-mkstemp.patch</userinput></screen>
  38
  39 <para>Now prepare Ed for compilation:</para>
  40
  41 <screen><userinput>./configure --prefix=/usr --exec-prefix=""</userinput></screen>
  42
  43 <para>The meaning of the configure option:</para>
  44
  45 <itemizedlist>
  46 <listitem><para><userinput>--exec-prefix=""</userinput>: This forces the
  47 programs to be installed into the <filename>/bin</filename> directory. Having
  48 the programs available there is useful in the event of the
  49 <filename>/usr</filename> partition being unavailable.</para></listitem>
  50 </itemizedlist>
  51
  52 <para>Compile the package:</para>
  53
  54 <screen><userinput>make</userinput></screen>
  55
  56 <para>To test the results, issue:
  57 <userinput>make check</userinput>.</para>
  58
  59 <para>Install the package:</para>
  60
  61 <screen><userinput>make install</userinput></screen>
  62
  63 </sect2>
  64
  65
  66 <sect2 id="contents-ed"><title>Contents of Ed</title>
  67
  68 <para><emphasis>Installed programs</emphasis>: ed and red (link to ed)</para>
  69
  70 </sect2>
  71
  72
  73 <sect2><title>Short descriptions</title>
  74
  75 <indexterm zone="ch-system-ed ed"><primary sortas="b-ed">ed</primary></indexterm>
  76 <para id="ed"><command>ed</command> is a line-oriented text editor. It can be used
  77 to create, display, modify and otherwise manipulate text files.</para>
  78
  79 <indexterm zone="ch-system-ed red"><primary sortas="b-red">red</primary></indexterm>
  80 <para id="red"><command>red</command> is a restricted ed -- it can only edit files
  81 in the current directory and cannot execute shell commands.</para>
  82
  83 </sect2>
  84
  85
  86
  87 </sect1>