[ab4fdfc] | 1 | <?xml version="1.0" encoding="UTF-8"?>
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[eedba153] | 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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[c42d2055] | 7 | <!ENTITY at-download-http "&sources-anduin-http;/at/at_&at-version;.orig.tar.gz">
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[15b2a2c2] | 8 | <!ENTITY at-download-ftp " ">
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[0beb4e7] | 9 | <!ENTITY at-md5sum "ca3657a1c90d7c3d252e0bc17feddc6e">
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| 10 | <!ENTITY at-size "130 KB">
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| 11 | <!ENTITY at-buildsize "1.9 MB (including tests)">
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[fa7ae3f3] | 12 | <!ENTITY at-time "less than 0.1 SBU">
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[eedba153] | 13 | ]>
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| 14 |
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[cb72478] | 15 | <sect1 id="at" xreflabel="At-&at-version;">
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[eedba153] | 16 | <?dbhtml filename="at.html"?>
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| 17 |
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| 18 |
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| 19 | <title>at-&at-version;</title>
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| 20 |
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| 21 | <indexterm zone="at">
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| 22 | <primary sortas="a-at">at</primary>
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| 23 | </indexterm>
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| 24 |
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| 25 | <sect2 role="package">
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| 26 | <title>Introduction to at</title>
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| 27 |
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[b1532549] | 28 | <para>
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[1638aa7] | 29 | The <application>at</application> package provides delayed job execution
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[b1532549] | 30 | and batch processing. It is required for Linux Standards Base (LSB)
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| 31 | conformance.
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| 32 | </para>
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[eedba153] | 33 |
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[aa996df1] | 34 | &lfs122_checked;
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[eedba153] | 35 |
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| 36 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 37 | <itemizedlist spacing="compact">
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| 38 | <listitem>
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[b1532549] | 39 | <para>
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| 40 | Download (HTTP): <ulink url="&at-download-http;"/>
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| 41 | </para>
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[eedba153] | 42 | </listitem>
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| 43 | <listitem>
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[b1532549] | 44 | <para>
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| 45 | Download (FTP): <ulink url="&at-download-ftp;"/>
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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 MD5 sum: &at-md5sum;
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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 size: &at-size;
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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 | Estimated disk space required: &at-buildsize;
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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 build time: &at-time;
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| 66 | </para>
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[eedba153] | 67 | </listitem>
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| 68 | </itemizedlist>
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| 69 |
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| 70 | <bridgehead renderas="sect3">at Dependencies</bridgehead>
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| 71 |
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[4ad93b6] | 72 | <bridgehead renderas="sect4">Required</bridgehead>
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| 73 | <para role="required">
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[af8e3ea3] | 74 | An <xref linkend="server-mail"/>
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[4ad93b6] | 75 | </para>
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| 76 |
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[eedba153] | 77 | <bridgehead renderas="sect4">Optional</bridgehead>
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| 78 | <para role="optional">
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| 79 | <xref linkend="linux-pam"/>
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| 80 | </para>
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| 81 |
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| 82 | </sect2>
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| 83 |
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| 84 | <sect2 role="installation">
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| 85 | <title>Installation of at</title>
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| 86 |
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[b1532549] | 87 | <para>
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| 88 | Before building <application>at</application>, as the
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| 89 | <systemitem class="username">root</systemitem> user you should create
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| 90 | the group and user <systemitem class="username">atd</systemitem> which
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[cb72478] | 91 | will run the <command>atd</command> daemon:
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[b1532549] | 92 | </para>
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[eedba153] | 93 |
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[6d2cc23] | 94 | <screen role="root"><userinput>groupadd -g 17 atd &&
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[cb72478] | 95 | useradd -d /dev/null -c "atd daemon" -g atd -s /bin/false -u 17 atd</userinput></screen>
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[3d6df725] | 96 |
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[b1532549] | 97 | <para>
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| 98 | Install <application>at</application> with the following
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| 99 | commands:
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| 100 | </para>
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[eedba153] | 101 |
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[d5497a2e] | 102 | <screen revision="sysv"><userinput>./configure --with-daemon_username=atd \
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[df9fb20] | 103 | --with-daemon_groupname=atd \
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[cb72478] | 104 | --with-jobdir=/var/spool/atjobs \
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| 105 | --with-atspool=/var/spool/atspool \
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[b0b87ad6] | 106 | SENDMAIL=/usr/sbin/sendmail &&
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[a1995fc] | 107 | make -j1</userinput></screen>
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[eedba153] | 108 |
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[d5497a2e] | 109 | <screen revision="systemd"><userinput>./configure --with-daemon_username=atd \
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| 110 | --with-daemon_groupname=atd \
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| 111 | SENDMAIL=/usr/sbin/sendmail \
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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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[d5497a2e] | 114 | --with-systemdsystemunitdir=/lib/systemd/system &&
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| 115 | make -j1</userinput></screen>
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| 116 |
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[b1532549] | 117 | <para>
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[cb72478] | 118 | To test the results, issue: <command>make test</command>.
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[b1532549] | 119 | </para>
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[eedba153] | 120 |
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[cb72478] | 121 |
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[b1532549] | 122 | <para>
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| 123 | Now, as the <systemitem class="username">root</systemitem> user:
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| 124 | </para>
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[eedba153] | 125 |
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[4647dd7] | 126 | <screen role="root"><userinput>make install docdir=/usr/share/doc/at-&at-version; \
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| 127 | atdocdir=/usr/share/doc/at-&at-version;</userinput></screen>
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[eedba153] | 128 |
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| 129 | </sect2>
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| 130 |
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| 131 | <sect2 role="configuration">
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| 132 | <title>Configuring at</title>
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| 133 |
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| 134 | <sect3 id="at-config">
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| 135 | <title>Config Files</title>
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| 136 |
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[b1532549] | 137 | <para>
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| 138 | <filename>/etc/at.allow</filename> and
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| 139 | <filename>/etc/at.deny</filename> determines who can submit jobs via at
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| 140 | or batch.
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| 141 | </para>
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[eedba153] | 142 |
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| 143 | <indexterm zone="at at-config">
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| 144 | <primary sortas="e-etc-at.allow">/etc/at.allow</primary>
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| 145 | </indexterm>
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| 146 |
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| 147 | <indexterm zone="at at-config">
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| 148 | <primary sortas="e-etc-at.deny">/etc/at.deny</primary>
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| 149 | </indexterm>
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| 150 |
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| 151 | </sect3>
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| 152 |
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[cb72478] | 153 | <sect3>
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| 154 | <title>Linux PAM Configuration</title>
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| 155 |
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| 156 | <para>
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| 157 | If <application>At</application> has been built with
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| 158 | <application>Linux PAM</application> support, you need to create a
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| 159 | <application>PAM</application> configuration file, to get it working
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| 160 | correctly with BLFS.
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| 161 | </para>
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| 162 |
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| 163 | <para>
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| 164 | Issue the following commands as the <systemitem
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| 165 | class="username">root</systemitem> user to create the configuration
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| 166 | file for <application>Linux PAM</application>:
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| 167 | </para>
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| 168 |
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| 169 | <screen role="root"><userinput>cat > /etc/pam.d/atd << "EOF"
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| 170 | <literal># Begin /etc/pam.d/atd
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| 171 |
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[fc9dd6eb] | 172 | auth required pam_unix.so
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| 173 | account required pam_unix.so
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[cb72478] | 174 | password required pam_unix.so
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[fc9dd6eb] | 175 | session required pam_unix.so
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[cb72478] | 176 |
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| 177 | # End /etc/pam.d/atd</literal>
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| 178 | EOF</userinput></screen>
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| 179 |
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| 180 | </sect3>
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| 181 |
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[eedba153] | 182 | <sect3 id="at-init">
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[d5497a2e] | 183 | <title><phrase revision="sysv">Boot Script</phrase>
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| 184 | <phrase revision="systemd">Systemd Unit</phrase></title>
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[eedba153] | 185 |
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[b1532549] | 186 | <para revision="sysv">
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| 187 | Install the <filename>/etc/init.d/atd</filename>
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| 188 | init script from the <xref linkend="bootscripts"/> package.
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| 189 | </para>
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[d5497a2e] | 190 |
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| 191 | <para revision="systemd">
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| 192 | To start the <command>atd</command> daemon at boot,
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| 193 | enable the previously installed systemd unit by
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| 194 | running the following command as the
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| 195 | <systemitem class="username">root</systemitem> user:
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| 196 | </para>
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[eedba153] | 197 |
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| 198 | <indexterm zone="at at-init">
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| 199 | <primary sortas="f-at">at</primary>
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| 200 | </indexterm>
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| 201 |
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[d5497a2e] | 202 | <screen role="root" revision="sysv"><userinput>make install-atd</userinput></screen>
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| 203 |
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| 204 | <screen role="root" revision="systemd"><userinput>systemctl enable atd</userinput></screen>
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[eedba153] | 205 |
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| 206 | </sect3>
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| 207 |
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| 208 | </sect2>
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| 209 |
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| 210 | <sect2 role="content">
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| 211 | <title>Contents</title>
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| 212 |
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| 213 | <segmentedlist>
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| 214 | <segtitle>Installed Programs</segtitle>
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| 215 | <segtitle>Installed Libraries</segtitle>
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| 216 | <segtitle>Installed Directories</segtitle>
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| 217 |
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| 218 | <seglistitem>
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[42d6d3b] | 219 | <seg>
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[909a015] | 220 | at, atd, atq (symlink), atrm (symlink), atrun, and batch
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| 221 | </seg>
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| 222 | <seg>
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| 223 | None
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| 224 | </seg>
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| 225 | <seg>
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[42d6d3b] | 226 | /usr/share/doc/at-&at-version;
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| 227 | </seg>
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[eedba153] | 228 | </seglistitem>
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| 229 | </segmentedlist>
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| 230 |
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| 231 | <variablelist>
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| 232 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 233 | <?dbfo list-presentation="list"?>
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| 234 | <?dbhtml list-presentation="table"?>
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| 235 |
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| 236 | <varlistentry id="at-prog">
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| 237 | <term><command>at</command></term>
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| 238 | <listitem>
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[b1532549] | 239 | <para>
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[4c24eb0a] | 240 | queues, examines or deletes jobs for later execution
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[b1532549] | 241 | </para>
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[eedba153] | 242 | <indexterm zone="at at-prog">
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| 243 | <primary sortas="b-at">at</primary>
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| 244 | </indexterm>
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| 245 | </listitem>
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| 246 | </varlistentry>
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| 247 |
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| 248 | <varlistentry id="atd">
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| 249 | <term><command>atd</command></term>
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| 250 | <listitem>
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[b1532549] | 251 | <para>
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[4c24eb0a] | 252 | is the daemon that runs jobs queued for later execution
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[b1532549] | 253 | </para>
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[eedba153] | 254 | <indexterm zone="at atd">
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| 255 | <primary sortas="b-atd">atd</primary>
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| 256 | </indexterm>
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| 257 | </listitem>
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| 258 | </varlistentry>
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| 259 |
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[42d6d3b] | 260 | <varlistentry id="atq">
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| 261 | <term><command>atq</command></term>
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| 262 | <listitem>
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[b1532549] | 263 | <para>
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[4c24eb0a] | 264 | lists the user's pending jobs, or all jobs, if superuser
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[b1532549] | 265 | </para>
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[42d6d3b] | 266 | <indexterm zone="at atq">
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| 267 | <primary sortas="b-atq">atq</primary>
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| 268 | </indexterm>
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| 269 | </listitem>
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| 270 | </varlistentry>
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| 271 |
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| 272 | <varlistentry id="atrm">
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| 273 | <term><command>atrm</command></term>
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| 274 | <listitem>
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[b1532549] | 275 | <para>
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[4c24eb0a] | 276 | deletes jobs, identified by their job number
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[b1532549] | 277 | </para>
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[42d6d3b] | 278 | <indexterm zone="at atrm">
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| 279 | <primary sortas="b-atrm">atrm</primary>
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| 280 | </indexterm>
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| 281 | </listitem>
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| 282 | </varlistentry>
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| 283 |
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[eedba153] | 284 | <varlistentry id="atrun">
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| 285 | <term><command>atrun</command></term>
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| 286 | <listitem>
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[b1532549] | 287 | <para>
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[4c24eb0a] | 288 | runs jobs queued for later execution
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[b1532549] | 289 | </para>
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[eedba153] | 290 | <indexterm zone="at atrun">
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| 291 | <primary sortas="b-atrun">atrun</primary>
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| 292 | </indexterm>
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| 293 | </listitem>
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| 294 | </varlistentry>
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| 295 |
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| 296 | <varlistentry id="batch">
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| 297 | <term><command>batch</command></term>
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| 298 | <listitem>
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[b1532549] | 299 | <para>
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[4c24eb0a] | 300 | is a script that executes commands when system load levels permit
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[eedba153] | 301 | </para>
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| 302 | <indexterm zone="at batch">
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| 303 | <primary sortas="b-batch">batch</primary>
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| 304 | </indexterm>
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| 305 | </listitem>
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| 306 | </varlistentry>
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| 307 |
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| 308 | </variablelist>
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| 309 |
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| 310 | </sect2>
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| 311 |
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| 312 | </sect1>
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