[eedba153] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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| 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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| 6 |
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[cb72478] | 7 | <!ENTITY at-download-http "http://software.calhariz.com/at/at_&at-version;.orig.tar.gz">
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[15b2a2c2] | 8 | <!ENTITY at-download-ftp " ">
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[cb72478] | 9 | <!ENTITY at-md5sum "518a1c1782c8434869bb0824f1d84520">
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| 10 | <!ENTITY at-md5sum "">
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| 11 | <!ENTITY at-size "125 KB">
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| 12 | <!ENTITY at-buildsize "1.8 MB including tests">
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[fa7ae3f3] | 13 | <!ENTITY at-time "less than 0.1 SBU">
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[eedba153] | 14 | ]>
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| 15 |
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[cb72478] | 16 | <sect1 id="at" xreflabel="At-&at-version;">
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[eedba153] | 17 | <?dbhtml filename="at.html"?>
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| 18 |
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| 19 | <sect1info>
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| 20 | <othername>$LastChangedBy$</othername>
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| 21 | <date>$Date$</date>
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| 22 | </sect1info>
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| 23 |
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| 24 | <title>at-&at-version;</title>
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| 25 |
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| 26 | <indexterm zone="at">
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| 27 | <primary sortas="a-at">at</primary>
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| 28 | </indexterm>
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| 29 |
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| 30 | <sect2 role="package">
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| 31 | <title>Introduction to at</title>
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| 32 |
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[b1532549] | 33 | <para>
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| 34 | The <application>at</application> package provide delayed job execution
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| 35 | and batch processing. It is required for Linux Standards Base (LSB)
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| 36 | conformance.
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| 37 | </para>
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[eedba153] | 38 |
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[2da40d0] | 39 | &lfs10_checked;
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[eedba153] | 40 |
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| 41 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 42 | <itemizedlist spacing="compact">
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| 43 | <listitem>
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[b1532549] | 44 | <para>
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| 45 | Download (HTTP): <ulink url="&at-download-http;"/>
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| 46 | </para>
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[eedba153] | 47 | </listitem>
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| 48 | <listitem>
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[b1532549] | 49 | <para>
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| 50 | Download (FTP): <ulink url="&at-download-ftp;"/>
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| 51 | </para>
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[eedba153] | 52 | </listitem>
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| 53 | <listitem>
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[b1532549] | 54 | <para>
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| 55 | Download MD5 sum: &at-md5sum;
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| 56 | </para>
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[eedba153] | 57 | </listitem>
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| 58 | <listitem>
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[b1532549] | 59 | <para>
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| 60 | Download size: &at-size;
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| 61 | </para>
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[eedba153] | 62 | </listitem>
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| 63 | <listitem>
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[b1532549] | 64 | <para>
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| 65 | Estimated disk space required: &at-buildsize;
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| 66 | </para>
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[eedba153] | 67 | </listitem>
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| 68 | <listitem>
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[b1532549] | 69 | <para>
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| 70 | Estimated build time: &at-time;
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| 71 | </para>
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[eedba153] | 72 | </listitem>
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| 73 | </itemizedlist>
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| 74 |
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| 75 | <bridgehead renderas="sect3">at Dependencies</bridgehead>
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| 76 |
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[4ad93b6] | 77 | <bridgehead renderas="sect4">Required</bridgehead>
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| 78 | <para role="required">
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[af8e3ea3] | 79 | An <xref linkend="server-mail"/>
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[4ad93b6] | 80 | </para>
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| 81 |
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[eedba153] | 82 | <bridgehead renderas="sect4">Optional</bridgehead>
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| 83 | <para role="optional">
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| 84 | <xref linkend="linux-pam"/>
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| 85 | </para>
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| 86 |
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| 87 | <para condition="html" role="usernotes">User Notes:
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| 88 | <ulink url="&blfs-wiki;/at"/></para>
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| 89 |
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| 90 | </sect2>
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| 91 |
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| 92 | <sect2 role="installation">
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| 93 | <title>Installation of at</title>
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| 94 |
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[b1532549] | 95 | <para>
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| 96 | Before building <application>at</application>, as the
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| 97 | <systemitem class="username">root</systemitem> user you should create
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| 98 | the group and user <systemitem class="username">atd</systemitem> which
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[cb72478] | 99 | will run the <command>atd</command> daemon:
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[b1532549] | 100 | </para>
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[eedba153] | 101 |
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[6d2cc23] | 102 | <screen role="root"><userinput>groupadd -g 17 atd &&
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[cb72478] | 103 | useradd -d /dev/null -c "atd daemon" -g atd -s /bin/false -u 17 atd</userinput></screen>
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[3d6df725] | 104 |
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[b1532549] | 105 | <para>
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| 106 | Install <application>at</application> with the following
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| 107 | commands:
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| 108 | </para>
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[eedba153] | 109 |
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[d5497a2e] | 110 | <screen revision="sysv"><userinput>./configure --with-daemon_username=atd \
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[df9fb20] | 111 | --with-daemon_groupname=atd \
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[cb72478] | 112 | --with-jobdir=/var/spool/atjobs \
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| 113 | --with-atspool=/var/spool/atspool \
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[b0b87ad6] | 114 | SENDMAIL=/usr/sbin/sendmail &&
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[a1995fc] | 115 | make -j1</userinput></screen>
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[eedba153] | 116 |
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[d5497a2e] | 117 | <screen revision="systemd"><userinput>./configure --with-daemon_username=atd \
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| 118 | --with-daemon_groupname=atd \
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| 119 | SENDMAIL=/usr/sbin/sendmail \
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[cb72478] | 120 | --with-jobdir=/var/spool/atjobs \
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| 121 | --with-atspool=/var/spool/atspool \
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[d5497a2e] | 122 | --with-systemdsystemunitdir=/lib/systemd/system &&
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| 123 | make -j1</userinput></screen>
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| 124 |
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[b1532549] | 125 | <para>
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[cb72478] | 126 | To test the results, issue: <command>make test</command>.
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[b1532549] | 127 | </para>
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[eedba153] | 128 |
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[cb72478] | 129 |
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[b1532549] | 130 | <para>
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| 131 | Now, as the <systemitem class="username">root</systemitem> user:
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| 132 | </para>
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[eedba153] | 133 |
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[4647dd7] | 134 | <screen role="root"><userinput>make install docdir=/usr/share/doc/at-&at-version; \
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| 135 | atdocdir=/usr/share/doc/at-&at-version;</userinput></screen>
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[eedba153] | 136 |
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| 137 | </sect2>
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| 138 |
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| 139 | <sect2 role="configuration">
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| 140 | <title>Configuring at</title>
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| 141 |
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| 142 | <sect3 id="at-config">
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| 143 | <title>Config Files</title>
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| 144 |
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[b1532549] | 145 | <para>
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| 146 | <filename>/etc/at.allow</filename> and
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| 147 | <filename>/etc/at.deny</filename> determines who can submit jobs via at
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| 148 | or batch.
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| 149 | </para>
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[eedba153] | 150 |
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| 151 | <indexterm zone="at at-config">
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| 152 | <primary sortas="e-etc-at.allow">/etc/at.allow</primary>
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| 153 | </indexterm>
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| 154 |
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| 155 | <indexterm zone="at at-config">
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| 156 | <primary sortas="e-etc-at.deny">/etc/at.deny</primary>
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| 157 | </indexterm>
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| 158 |
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| 159 | </sect3>
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| 160 |
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[cb72478] | 161 | <sect3>
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| 162 | <title>Linux PAM Configuration</title>
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| 163 |
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| 164 | <para>
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| 165 | If <application>At</application> has been built with
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| 166 | <application>Linux PAM</application> support, you need to create a
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| 167 | <application>PAM</application> configuration file, to get it working
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| 168 | correctly with BLFS.
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| 169 | </para>
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| 170 |
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| 171 | <para>
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| 172 | Issue the following commands as the <systemitem
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| 173 | class="username">root</systemitem> user to create the configuration
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| 174 | file for <application>Linux PAM</application>:
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| 175 | </para>
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| 176 |
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| 177 | <screen role="root"><userinput>cat > /etc/pam.d/atd << "EOF"
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| 178 | <literal># Begin /etc/pam.d/atd
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| 179 |
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| 180 | auth required pam_unix.so
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| 181 | account required pam_unix.so
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| 182 | password required pam_unix.so
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| 183 | session required pam_unix.so
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| 184 |
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| 185 | # End /etc/pam.d/atd</literal>
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| 186 | EOF</userinput></screen>
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| 187 |
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| 188 | </sect3>
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| 189 |
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[eedba153] | 190 | <sect3 id="at-init">
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[d5497a2e] | 191 | <title><phrase revision="sysv">Boot Script</phrase>
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| 192 | <phrase revision="systemd">Systemd Unit</phrase></title>
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[eedba153] | 193 |
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[b1532549] | 194 | <para revision="sysv">
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| 195 | Install the <filename>/etc/init.d/atd</filename>
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| 196 | init script from the <xref linkend="bootscripts"/> package.
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| 197 | </para>
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[d5497a2e] | 198 |
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| 199 | <para revision="systemd">
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| 200 | To start the <command>atd</command> daemon at boot,
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| 201 | enable the previously installed systemd unit by
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| 202 | running the following command as the
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| 203 | <systemitem class="username">root</systemitem> user:
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| 204 | </para>
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[eedba153] | 205 |
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| 206 | <indexterm zone="at at-init">
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| 207 | <primary sortas="f-at">at</primary>
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| 208 | </indexterm>
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| 209 |
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[d5497a2e] | 210 | <screen role="root" revision="sysv"><userinput>make install-atd</userinput></screen>
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| 211 |
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| 212 | <screen role="root" revision="systemd"><userinput>systemctl enable atd</userinput></screen>
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[eedba153] | 213 |
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| 214 | </sect3>
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| 215 |
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| 216 | </sect2>
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| 217 |
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| 218 | <sect2 role="content">
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| 219 | <title>Contents</title>
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| 220 |
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| 221 | <segmentedlist>
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| 222 | <segtitle>Installed Programs</segtitle>
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| 223 | <segtitle>Installed Libraries</segtitle>
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| 224 | <segtitle>Installed Directories</segtitle>
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| 225 |
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| 226 | <seglistitem>
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[42d6d3b] | 227 | <seg>
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[909a015] | 228 | at, atd, atq (symlink), atrm (symlink), atrun, and batch
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| 229 | </seg>
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| 230 | <seg>
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| 231 | None
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| 232 | </seg>
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| 233 | <seg>
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[42d6d3b] | 234 | /usr/share/doc/at-&at-version;
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| 235 | </seg>
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[eedba153] | 236 | </seglistitem>
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| 237 | </segmentedlist>
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| 238 |
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| 239 | <variablelist>
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| 240 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 241 | <?dbfo list-presentation="list"?>
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| 242 | <?dbhtml list-presentation="table"?>
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| 243 |
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| 244 | <varlistentry id="at-prog">
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| 245 | <term><command>at</command></term>
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| 246 | <listitem>
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[b1532549] | 247 | <para>
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| 248 | queues, examines or deletes jobs for later execution.
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| 249 | </para>
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[eedba153] | 250 | <indexterm zone="at at-prog">
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| 251 | <primary sortas="b-at">at</primary>
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| 252 | </indexterm>
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| 253 | </listitem>
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| 254 | </varlistentry>
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| 255 |
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| 256 | <varlistentry id="atd">
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| 257 | <term><command>atd</command></term>
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| 258 | <listitem>
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[b1532549] | 259 | <para>
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| 260 | is the daemon that runs jobs queued for later execution.
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| 261 | </para>
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[eedba153] | 262 | <indexterm zone="at atd">
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| 263 | <primary sortas="b-atd">atd</primary>
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| 264 | </indexterm>
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| 265 | </listitem>
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| 266 | </varlistentry>
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| 267 |
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[42d6d3b] | 268 | <varlistentry id="atq">
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| 269 | <term><command>atq</command></term>
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| 270 | <listitem>
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[b1532549] | 271 | <para>
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| 272 | lists the user's pending jobs, or all jobs, if superuser.
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| 273 | </para>
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[42d6d3b] | 274 | <indexterm zone="at atq">
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| 275 | <primary sortas="b-atq">atq</primary>
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| 276 | </indexterm>
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| 277 | </listitem>
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| 278 | </varlistentry>
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| 279 |
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| 280 | <varlistentry id="atrm">
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| 281 | <term><command>atrm</command></term>
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| 282 | <listitem>
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[b1532549] | 283 | <para>
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| 284 | deletes jobs, identified by their job number.
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| 285 | </para>
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[42d6d3b] | 286 | <indexterm zone="at atrm">
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| 287 | <primary sortas="b-atrm">atrm</primary>
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| 288 | </indexterm>
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| 289 | </listitem>
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| 290 | </varlistentry>
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| 291 |
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[eedba153] | 292 | <varlistentry id="atrun">
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| 293 | <term><command>atrun</command></term>
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| 294 | <listitem>
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[b1532549] | 295 | <para>
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| 296 | runs jobs queued for later execution.
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| 297 | </para>
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[eedba153] | 298 | <indexterm zone="at atrun">
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| 299 | <primary sortas="b-atrun">atrun</primary>
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| 300 | </indexterm>
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| 301 | </listitem>
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| 302 | </varlistentry>
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| 303 |
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| 304 | <varlistentry id="batch">
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| 305 | <term><command>batch</command></term>
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| 306 | <listitem>
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[b1532549] | 307 | <para>
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| 308 | is a script that executes commands when system load levels permit.
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[eedba153] | 309 | </para>
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| 310 | <indexterm zone="at batch">
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| 311 | <primary sortas="b-batch">batch</primary>
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| 312 | </indexterm>
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| 313 | </listitem>
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| 314 | </varlistentry>
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| 315 |
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| 316 | </variablelist>
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| 317 |
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| 318 | </sect2>
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| 319 |
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| 320 | </sect1>
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