source: BOOK/final-system/common/sysvinit.xml@ 4232f0e

clfs-1.2 clfs-2.1 clfs-3.0.0-systemd clfs-3.0.0-sysvinit systemd sysvinit
Last change on this file since 4232f0e was aa18ac0, checked in by Manuel Canales Esparcia <manuel@…>, 18 years ago

Updated trunk book sources to use DocBook-XML DTD 4.5.

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File size: 11.1 KB
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[3f8be484]1<?xml version="1.0" encoding="ISO-8859-1"?>
[aa18ac0]2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
[3f8be484]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>
[fb40919]100 initscript from the CLFS-Bootscripts package calls the
[3f8be484]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>
[e29fb58]114 <seg>bootlogd, halt, init, killall5, last, lastb (link to last), mesg,
115 mountpoint, pidof (link to killall5), poweroff (link to halt),
116 reboot (link to halt), runlevel, shutdown, sulogin,
117 telinit (link to init), utmpdump, and wall</seg>
[3f8be484]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
[e29fb58]126 <varlistentry id="bootlogd">
127 <term><command>bootlogd</command></term>
128 <listitem>
129 <para>Logs boot messages to a log file</para>
130 <indexterm zone="ch-system-sysvinit bootlogd">
131 <primary sortas="b-bootlogd">bootlogd</primary>
132 </indexterm>
133 </listitem>
134 </varlistentry>
135
[3f8be484]136 <varlistentry id="halt">
137 <term><command>halt</command></term>
138 <listitem>
139 <para>Normally invokes <command>shutdown</command> with the
140 <parameter>-h</parameter> option, except when already in run-level 0,
141 then it tells the kernel to halt the system; it notes in the
142 file <filename>/var/log/wtmp</filename> that the system is being
143 brought down</para>
144 <indexterm zone="ch-system-sysvinit halt">
145 <primary sortas="b-halt">halt</primary>
146 </indexterm>
147 </listitem>
148 </varlistentry>
149
150 <varlistentry id="init">
151 <term><command>init</command></term>
152 <listitem>
153 <para>The first process to be started when the kernel has initialized
154 the hardware which takes over the boot process and starts all the
155 proceses it is instructed to</para>
156 <indexterm zone="ch-system-sysvinit init">
157 <primary sortas="b-init">init</primary>
158 </indexterm>
159 </listitem>
160 </varlistentry>
161
162 <varlistentry id="killall5">
163 <term><command>killall5</command></term>
164 <listitem>
165 <para>Sends a signal to all processes, except the processes in its own
166 session so it will not kill the shell running the script that called
167 it</para>
168 <indexterm zone="ch-system-sysvinit killall5">
169 <primary sortas="b-killall5">killall5</primary>
170 </indexterm>
171 </listitem>
172 </varlistentry>
173
174 <varlistentry id="last">
175 <term><command>last</command></term>
176 <listitem>
177 <para>Shows which users last logged in (and out), searching back
178 through the <filename>/var/log/wtmp</filename> file; it also shows
179 system boots, shutdowns, and run-level changes</para>
180 <indexterm zone="ch-system-sysvinit last">
181 <primary sortas="b-last">last</primary>
182 </indexterm>
183 </listitem>
184 </varlistentry>
185
186 <varlistentry id="lastb">
187 <term><command>lastb</command></term>
188 <listitem>
189 <para>Shows the failed login attempts, as logged in
190 <filename>/var/log/btmp</filename></para>
191 <indexterm zone="ch-system-sysvinit lastb">
192 <primary sortas="b-lastb">lastb</primary>
193 </indexterm>
194 </listitem>
195 </varlistentry>
196
197 <varlistentry id="mesg">
198 <term><command>mesg</command></term>
199 <listitem>
200 <para>Controls whether other users can send messages to the current
201 user's terminal</para>
202 <indexterm zone="ch-system-sysvinit mesg">
203 <primary sortas="b-mesg">mesg</primary>
204 </indexterm>
205 </listitem>
206 </varlistentry>
207
[2f345f4]208 <varlistentry id="mountpoint">
[09d06d3]209 <term><command>mountpoint</command></term>
210 <listitem>
211 <para>Tells you whether or not a directory is a mount point.</para>
[a68b59e]212 <indexterm zone="ch-system-sysvinit mountpoint">
[09d06d3]213 <primary sortas="b-mountpoint">mountpoint</primary>
214 </indexterm>
215 </listitem>
216 </varlistentry>
217
[3f8be484]218 <varlistentry id="pidof">
219 <term><command>pidof</command></term>
220 <listitem>
221 <para>Reports the PIDs of the given programs</para>
222 <indexterm zone="ch-system-sysvinit pidof">
223 <primary sortas="b-pidof">pidof</primary>
224 </indexterm>
225 </listitem>
226 </varlistentry>
227
228 <varlistentry id="poweroff">
229 <term><command>poweroff</command></term>
230 <listitem>
231 <para>Tells the kernel to halt the system and switch off the computer
232 (see <command>halt</command>)</para>
233 <indexterm zone="ch-system-sysvinit poweroff">
234 <primary sortas="b-poweroff">poweroff</primary>
235 </indexterm>
236 </listitem>
237 </varlistentry>
238
239 <varlistentry id="reboot">
240 <term><command>reboot</command></term>
241 <listitem>
242 <para>Tells the kernel to reboot the system (see
243 <command>halt</command>)</para>
244 <indexterm zone="ch-system-sysvinit reboot">
245 <primary sortas="b-reboot">reboot</primary>
246 </indexterm>
247 </listitem>
248 </varlistentry>
249
250 <varlistentry id="runlevel">
251 <term><command>runlevel</command></term>
252 <listitem>
253 <para>Reports the previous and the current run-level, as noted in
254 the last run-level record in <filename>/var/run/utmp</filename></para>
255 <indexterm zone="ch-system-sysvinit runlevel">
256 <primary sortas="b-runlevel">runlevel</primary>
257 </indexterm>
258 </listitem>
259 </varlistentry>
260
261 <varlistentry id="shutdown">
262 <term><command>shutdown</command></term>
263 <listitem>
264 <para>Brings the system down in a secure way, signaling all processes
265 and notifying all logged-in users</para>
266 <indexterm zone="ch-system-sysvinit shutdown">
267 <primary sortas="b-shutdown">shutdown</primary>
268 </indexterm>
269 </listitem>
270 </varlistentry>
271
272 <varlistentry id="sulogin">
273 <term><command>sulogin</command></term>
274 <listitem>
275 <para>Allows <emphasis>root</emphasis> to log in; it is normally
276 invoked by <command>init</command> when the system goes into single
277 user mode</para>
278 <indexterm zone="ch-system-sysvinit sulogin">
279 <primary sortas="b-sulogin">sulogin</primary>
280 </indexterm>
281 </listitem>
282 </varlistentry>
283
284 <varlistentry id="telinit">
285 <term><command>telinit</command></term>
286 <listitem>
287 <para>Tells <command>init</command> which run-level to change to</para>
288 <indexterm zone="ch-system-sysvinit telinit">
289 <primary sortas="b-telinit">telinit</primary>
290 </indexterm>
291 </listitem>
292 </varlistentry>
293
294 <varlistentry id="utmpdump">
295 <term><command>utmpdump</command></term>
296 <listitem>
297 <para>Displays the content of the given login file in a more
298 user-friendly format</para>
299 <indexterm zone="ch-system-sysvinit utmpdump">
300 <primary sortas="b-utmpdump">utmpdump</primary>
301 </indexterm>
302 </listitem>
303 </varlistentry>
304
305 <varlistentry id="wall">
306 <term><command>wall</command></term>
307 <listitem>
308 <para>Writes a message to all logged-in users</para>
309 <indexterm zone="ch-system-sysvinit wall">
310 <primary sortas="b-wall">wall</primary>
311 </indexterm>
312 </listitem>
313 </varlistentry>
314
315 </variablelist>
316
317 </sect2>
318
319</sect1>
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