source: final-system/common/sysvinit.xml @ b9313f3

Last change on this file since b9313f3 was b9313f3, checked in by Jim Gifford <clfs@…>, 13 years ago

r3795@server (orig r1715): chris | 2006-05-31 21:54:59 -0700
Updated lists of installed programs

  • Property mode set to 100644
File size: 10.8 KB
Line 
1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
3  "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
4  <!ENTITY % general-entities SYSTEM "../../general.ent">
5  %general-entities;
6]>
7<sect1 id="ch-system-sysvinit" role="wrap">
8  <?dbhtml filename="sysvinit.html"?>
9
10  <title>Sysvinit-&sysvinit-version;</title>
11
12  <indexterm zone="ch-system-sysvinit">
13    <primary sortas="a-Sysvinit">Sysvinit</primary>
14  </indexterm>
15
16  <sect2 role="package">
17    <title/>
18
19    <para>The Sysvinit package contains programs for controlling the startup,
20    running, and shutdown of the system.</para>
21
22  </sect2>
23
24  <sect2 role="installation">
25    <title>Installation of Sysvinit</title>
26
27    <para os="a">When run-levels are changed (for example, when halting the
28    system), <command>init</command> sends termination signals to those
29    processes that <command>init</command> itself started and that should
30    not be running in the new run-level.  While doing this,
31    <command>init</command> outputs messages like <quote>Sending processes
32    the TERM signal</quote> which seem to imply that it is sending these
33    signals to all currently running processes. To avoid this
34    misinterpretation, modify the source so that these messages read like
35    <quote>Sending processes started by init the TERM signal</quote>
36    instead:</para>
37
38<screen os="b"><userinput>sed -i 's@Sending processes@&amp; started by init@g' \
39    src/init.c</userinput></screen>
40
41    <para os="c">Compile the package:</para>
42
43<screen os="d"><userinput>make -C src clobber
44make -C src</userinput></screen>
45
46    <para os="e">Install the package:</para>
47
48<screen os="f"><userinput>make -C src install</userinput></screen>
49
50  </sect2>
51
52  <sect2 id="conf-sysvinit" role="configuration">
53    <title>Configuring Sysvinit</title>
54
55    <indexterm zone="conf-sysvinit">
56      <primary sortas="a-Sysvinit">Sysvinit</primary>
57    <secondary>configuring</secondary></indexterm>
58
59    <indexterm zone="conf-sysvinit">
60      <primary sortas="e-/etc/inittab">/etc/inittab</primary>
61    </indexterm>
62
63    <para>Create a new file <filename>/etc/inittab</filename> by running the
64    following:</para>
65
66<screen><userinput>cat &gt; /etc/inittab &lt;&lt; "EOF"
67<literal># Begin /etc/inittab
68
69id:3:initdefault:
70
71si::sysinit:/etc/rc.d/init.d/rc sysinit
72
73l0:0:wait:/etc/rc.d/init.d/rc 0
74l1:S1:wait:/etc/rc.d/init.d/rc 1
75l2:2:wait:/etc/rc.d/init.d/rc 2
76l3:3:wait:/etc/rc.d/init.d/rc 3
77l4:4:wait:/etc/rc.d/init.d/rc 4
78l5:5:wait:/etc/rc.d/init.d/rc 5
79l6:6:wait:/etc/rc.d/init.d/rc 6
80
81ca:12345:ctrlaltdel:/sbin/shutdown -t1 -a -r now
82
83su:S016:once:/sbin/sulogin
84
851:2345:respawn:/sbin/agetty -I '\033(K' tty1 9600
862:2345:respawn:/sbin/agetty -I '\033(K' tty2 9600
873:2345:respawn:/sbin/agetty -I '\033(K' tty3 9600
884:2345:respawn:/sbin/agetty -I '\033(K' tty4 9600
895:2345:respawn:/sbin/agetty -I '\033(K' tty5 9600
906:2345:respawn:/sbin/agetty -I '\033(K' tty6 9600
91
92# End /etc/inittab</literal>
93EOF</userinput></screen>
94
95    <para>The <parameter>-I '\033(K'</parameter> option tells
96    <command>agetty</command> to send this escape sequence to the terminal
97    before doing anything else. This escape sequence switches the console
98    character set to a user-defined one, which can be modified by running
99    the <command>setfont</command> program. The <command>console</command>
100    initscript from the LFS-Bootscripts package calls the
101    <command>setfont</command> program during system startup. Sending this
102    escape sequence is necessary for people who use non-ISO 8859-1 screen
103    fonts, but it does not affect native English speakers.</para>
104
105  </sect2>
106
107  <sect2 id="contents-sysvinit" role="content">
108    <title>Contents of Sysvinit</title>
109
110    <segmentedlist>
111      <segtitle>Installed programs</segtitle>
112
113      <seglistitem>
114        <seg>halt, init, killall5, last, lastb (link to last), mesg, mountpoint, pidof
115        (link to killall5), poweroff (link to halt), reboot (link to halt),
116        runlevel, shutdown, sulogin, telinit (link to init), utmpdump,
117        and wall</seg>
118      </seglistitem>
119    </segmentedlist>
120
121    <variablelist>
122      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
123      <?dbfo list-presentation="list"?>
124      <?dbhtml list-presentation="table"?>
125
126      <varlistentry id="halt">
127        <term><command>halt</command></term>
128        <listitem>
129          <para>Normally invokes <command>shutdown</command> with the
130          <parameter>-h</parameter> option, except when already in run-level 0,
131          then it tells the kernel to halt the system; it notes in the
132          file <filename>/var/log/wtmp</filename> that the system is being
133          brought down</para>
134          <indexterm zone="ch-system-sysvinit halt">
135            <primary sortas="b-halt">halt</primary>
136          </indexterm>
137        </listitem>
138      </varlistentry>
139
140      <varlistentry id="init">
141        <term><command>init</command></term>
142        <listitem>
143          <para>The first process to be started when the kernel has initialized
144          the hardware which takes over the boot process and starts all the
145          proceses it is instructed to</para>
146          <indexterm zone="ch-system-sysvinit init">
147            <primary sortas="b-init">init</primary>
148          </indexterm>
149        </listitem>
150      </varlistentry>
151
152      <varlistentry id="killall5">
153        <term><command>killall5</command></term>
154        <listitem>
155          <para>Sends a signal to all processes, except the processes in its own
156          session so it will not kill the shell running the script that called
157          it</para>
158          <indexterm zone="ch-system-sysvinit killall5">
159            <primary sortas="b-killall5">killall5</primary>
160          </indexterm>
161        </listitem>
162      </varlistentry>
163
164      <varlistentry id="last">
165        <term><command>last</command></term>
166        <listitem>
167          <para>Shows which users last logged in (and out), searching back
168          through the <filename>/var/log/wtmp</filename> file; it also shows
169          system boots, shutdowns, and run-level changes</para>
170          <indexterm zone="ch-system-sysvinit last">
171            <primary sortas="b-last">last</primary>
172          </indexterm>
173        </listitem>
174      </varlistentry>
175
176      <varlistentry id="lastb">
177        <term><command>lastb</command></term>
178        <listitem>
179          <para>Shows the failed login attempts, as logged in
180          <filename>/var/log/btmp</filename></para>
181          <indexterm zone="ch-system-sysvinit lastb">
182            <primary sortas="b-lastb">lastb</primary>
183          </indexterm>
184        </listitem>
185      </varlistentry>
186
187      <varlistentry id="mesg">
188        <term><command>mesg</command></term>
189        <listitem>
190          <para>Controls whether other users can send messages to the current
191          user's terminal</para>
192          <indexterm zone="ch-system-sysvinit mesg">
193            <primary sortas="b-mesg">mesg</primary>
194          </indexterm>
195        </listitem>
196      </varlistentry>
197
198      <varlistentry id="mountpoint">
199        <term><command>mountpoint</command></term>
200        <listitem>
201          <para>Tells you whether or not a directory is a mount point.</para>
202          <indexterm zone="ch-system-sysvinit mountpoint">
203            <primary sortas="b-mountpoint">mountpoint</primary>
204          </indexterm>
205        </listitem>
206      </varlistentry>
207
208      <varlistentry id="pidof">
209        <term><command>pidof</command></term>
210        <listitem>
211          <para>Reports the PIDs of the given programs</para>
212          <indexterm zone="ch-system-sysvinit pidof">
213            <primary sortas="b-pidof">pidof</primary>
214          </indexterm>
215        </listitem>
216      </varlistentry>
217
218      <varlistentry id="poweroff">
219        <term><command>poweroff</command></term>
220        <listitem>
221          <para>Tells the kernel to halt the system and switch off the computer
222          (see <command>halt</command>)</para>
223          <indexterm zone="ch-system-sysvinit poweroff">
224            <primary sortas="b-poweroff">poweroff</primary>
225          </indexterm>
226        </listitem>
227      </varlistentry>
228
229      <varlistentry id="reboot">
230        <term><command>reboot</command></term>
231        <listitem>
232          <para>Tells the kernel to reboot the system (see
233          <command>halt</command>)</para>
234          <indexterm zone="ch-system-sysvinit reboot">
235            <primary sortas="b-reboot">reboot</primary>
236          </indexterm>
237        </listitem>
238      </varlistentry>
239
240      <varlistentry id="runlevel">
241        <term><command>runlevel</command></term>
242        <listitem>
243          <para>Reports the previous and the current run-level, as noted in
244          the last run-level record in <filename>/var/run/utmp</filename></para>
245          <indexterm zone="ch-system-sysvinit runlevel">
246            <primary sortas="b-runlevel">runlevel</primary>
247          </indexterm>
248        </listitem>
249      </varlistentry>
250
251      <varlistentry id="shutdown">
252        <term><command>shutdown</command></term>
253        <listitem>
254          <para>Brings the system down in a secure way, signaling all processes
255          and notifying all logged-in users</para>
256          <indexterm zone="ch-system-sysvinit shutdown">
257            <primary sortas="b-shutdown">shutdown</primary>
258          </indexterm>
259        </listitem>
260      </varlistentry>
261
262      <varlistentry id="sulogin">
263        <term><command>sulogin</command></term>
264        <listitem>
265          <para>Allows <emphasis>root</emphasis> to log in; it is normally
266          invoked by <command>init</command> when the system goes into single
267          user mode</para>
268          <indexterm zone="ch-system-sysvinit sulogin">
269            <primary sortas="b-sulogin">sulogin</primary>
270          </indexterm>
271        </listitem>
272      </varlistentry>
273
274      <varlistentry id="telinit">
275        <term><command>telinit</command></term>
276        <listitem>
277          <para>Tells <command>init</command> which run-level to change to</para>
278          <indexterm zone="ch-system-sysvinit telinit">
279            <primary sortas="b-telinit">telinit</primary>
280          </indexterm>
281        </listitem>
282      </varlistentry>
283
284      <varlistentry id="utmpdump">
285        <term><command>utmpdump</command></term>
286        <listitem>
287          <para>Displays the content of the given login file in a more
288          user-friendly format</para>
289          <indexterm zone="ch-system-sysvinit utmpdump">
290            <primary sortas="b-utmpdump">utmpdump</primary>
291          </indexterm>
292        </listitem>
293      </varlistentry>
294
295      <varlistentry id="wall">
296        <term><command>wall</command></term>
297        <listitem>
298          <para>Writes a message to all logged-in users</para>
299          <indexterm zone="ch-system-sysvinit wall">
300            <primary sortas="b-wall">wall</primary>
301          </indexterm>
302        </listitem>
303      </varlistentry>
304
305    </variablelist>
306
307  </sect2>
308
309</sect1>
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