mirror of
https://github.com/Zeckmathederg/glfs.git
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1586494b11
git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@3134 af4574ff-66df-0310-9fd7-8a98e5e911e0
94 lines
3.0 KiB
XML
94 lines
3.0 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
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"http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../../general.ent">
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%general-entities;
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<!ENTITY which-download-http "http://www.xs4all.nl/~carlo17/which/which-&which-version;.tar.gz">
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<!ENTITY which-download-ftp "ftp://ftp.gnu.org/gnu/which/which-&which-version;.tar.gz">
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<!ENTITY which-size "123 KB">
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<!ENTITY which-buildsize "940 KB">
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<!ENTITY which-time "0.03 SBU">
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]>
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<sect1 id="which" xreflabel="which-&which-version;">
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<sect1info>
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<othername>$LastChangedBy$</othername>
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<date>$Date$</date>
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</sect1info>
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<?dbhtml filename="which.html"?>
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<title><application>which</application>-&which-version; and alternatives</title>
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<para>The presence or absence of the which program in the main
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<acronym>LFS</acronym> book is probably one of the most contentious issues on
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the mailing lists. It has resulted in at least one flame war in the past.
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To hopefully put an end to this once and for all, presented here are two
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options for equipping your system with "which". The question of which "which"
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is for you to decide.</para>
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<para>The first option is to install the actual <acronym>GNU</acronym> program
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<emphasis>which</emphasis>.</para>
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<sect2>
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<title>Introduction to <application>which</application></title>
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<sect3><title>Package information</title>
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<itemizedlist spacing='compact'>
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<listitem><para>Download (HTTP): <ulink
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url="&which-download-http;"/></para></listitem>
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<listitem><para>Download (FTP): <ulink
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url="&which-download-ftp;"/></para></listitem>
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<listitem><para>Download size: &which-size;</para></listitem>
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<listitem><para>Estimated disk space required:
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&which-buildsize;</para></listitem>
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<listitem><para>Estimated build time:
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&which-time;</para></listitem></itemizedlist>
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</sect3>
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</sect2>
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<sect2>
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<title>Installation of <application>which</application></title>
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<para>Install <application>which</application> by running the following
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commands:</para>
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<screen><userinput><command>./configure --prefix=/usr &&
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make &&
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make install</command></userinput></screen>
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</sect2>
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<sect2>
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<title>Contents</title>
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<para>The <application>which</application> package contains
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<command>which</command>.</para>
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</sect2>
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<sect2><title>Description</title>
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<sect3><title>which</title>
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<para><command>which</command> shows the full path of (shell) commands.</para>
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</sect3>
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</sect2>
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<sect2>
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<title>The 'which' script</title>
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<para>The second option (for those who don't want to install the program)
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is to create a simple script:</para>
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<screen><userinput><command>cat > /usr/bin/which << "EOF"</command>
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#!/bin/bash
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type -pa "$@" | head -n 1 ; exit ${PIPESTATUS[0]}
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<command>EOF
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chmod 755 /usr/bin/which
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chown root:root /usr/bin/which</command></userinput></screen>
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<para>This should work OK and is probably the easiest solution
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for most cases, but is not the most comprehensive implementation.</para>
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</sect2>
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</sect1>
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