source: general/sysutils/which.xml@ 0134954

10.0 10.1 11.0 7.10 8.0 8.1 8.2 8.3 8.4 9.0 9.1 basic bdubbs/svn elogind ken/refactor-virt lazarus nosym perl-modules qt5new trunk xry111/git-date xry111/git-date-for-trunk xry111/git-date-test
Last change on this file since 0134954 was 0134954, checked in by Bruce Dubbs <bdubbs@…>, 5 years ago

Initial 7.10 tags; only 765 to go

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@17651 af4574ff-66df-0310-9fd7-8a98e5e911e0

  • Property mode set to 100644
File size: 4.5 KB
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1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../../general.ent">
5 %general-entities;
6
7<!-- <!ENTITY which-download-http "http://www.xs4all.nl/~carlo17/which/which-&which-version;.tar.gz">-->
8
9 <!ENTITY which-download-http "http://ftp.gnu.org/gnu/which/which-&which-version;.tar.gz">
10 <!ENTITY which-download-ftp "ftp://ftp.gnu.org/gnu/which/which-&which-version;.tar.gz">
11 <!ENTITY which-md5sum "097ff1a324ae02e0a3b0369f07a7544a">
12 <!ENTITY which-size "148 KB">
13 <!ENTITY which-buildsize "1 MB">
14 <!ENTITY which-time "less than 0.1 SBU">
15]>
16
17<sect1 id="which" xreflabel="Which-&which-version;">
18 <?dbhtml filename="which.html"?>
19
20 <sect1info>
21 <othername>$LastChangedBy$</othername>
22 <date>$Date$</date>
23 </sect1info>
24
25 <title>Which-&which-version; and Alternatives</title>
26
27 <indexterm zone="which">
28 <primary sortas="a-Which">Which</primary>
29 </indexterm>
30
31 <para>The presence or absence of the <command>which</command> program
32 in the main LFS book is probably one of the most contentious issues on the
33 mailing lists. It has resulted in at least one flame war in the past. To hopefully
34 put an end to this once and for all, presented here are two options for equipping
35 your system with <command>which</command>. The question of which
36 <quote><command>which</command></quote> is for you to decide.</para>
37
38 <para>The first option is to install the actual GNU
39 <application>which</application> package.</para>
40
41 &lfs7a_checked;
42
43 <sect2 role="package">
44 <title>Introduction to Which</title>
45
46 <bridgehead renderas="sect3">Package Information</bridgehead>
47 <itemizedlist spacing="compact">
48 <listitem>
49 <para>Download (HTTP): <ulink url="&which-download-http;"/></para>
50 </listitem>
51 <listitem>
52 <para>Download (FTP): <ulink url="&which-download-ftp;"/></para>
53 </listitem>
54 <listitem>
55 <para>Download MD5 sum: &which-md5sum;</para>
56 </listitem>
57 <listitem>
58 <para>Download size: &which-size;</para>
59 </listitem>
60 <listitem>
61 <para>Estimated disk space required: &which-buildsize;</para>
62 </listitem>
63 <listitem>
64 <para>Estimated build time: &which-time;</para>
65 </listitem>
66 </itemizedlist>
67
68 <para condition="html" role="usernotes">User Notes:
69 <ulink url="&blfs-wiki;/which"/></para>
70
71 </sect2>
72
73 <sect2 role="installation">
74 <title>Installation of Which</title>
75
76 <para>Install <application>which</application> by running the following
77 commands:</para>
78
79<screen><userinput>./configure --prefix=/usr &amp;&amp;
80make</userinput></screen>
81
82 <para>This package does not come with a test suite.</para>
83
84 <para>Now, as the <systemitem class="username">root</systemitem> user:</para>
85
86<screen role="root"><userinput>make install</userinput></screen>
87
88 </sect2>
89
90 <sect2 role="content">
91 <title>Contents</title>
92
93 <segmentedlist>
94 <segtitle>Installed Program</segtitle>
95 <segtitle>Installed Libraries</segtitle>
96 <segtitle>Installed Directories</segtitle>
97
98 <seglistitem>
99 <seg>which</seg>
100 <seg>None</seg>
101 <seg>None</seg>
102 </seglistitem>
103 </segmentedlist>
104
105 <variablelist>
106 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
107 <?dbfo list-presentation="list"?>
108 <?dbhtml list-presentation="table"?>
109
110 <varlistentry id="which-prog">
111 <term><command>which</command></term>
112 <listitem>
113 <para>shows the full path of (shell) commands installed in your
114 <envar>PATH</envar>.</para>
115 <indexterm zone="which which-prog">
116 <primary sortas="b-which">which</primary>
117 </indexterm>
118 </listitem>
119 </varlistentry>
120
121 </variablelist>
122
123 </sect2>
124
125 <sect2 role="installation">
126 <title>The 'which' Script</title>
127
128 <para>The second option (for those who don't want to install the package)
129 is to create a simple script (execute as the
130 <systemitem class="username">root</systemitem> user):</para>
131
132<screen role="root"><userinput>cat &gt; /usr/bin/which &lt;&lt; "EOF"
133<literal>#!/bin/bash
134type -pa "$@" | head -n 1 ; exit ${PIPESTATUS[0]}</literal>
135EOF
136chmod -v 755 /usr/bin/which
137chown -v root:root /usr/bin/which</userinput></screen>
138
139 <para>This should work OK and is probably the easiest solution
140 for most cases, but is not the most comprehensive implementation.</para>
141
142 </sect2>
143
144</sect1>
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