AUTHOR: Sune Molgaard DATE: 2004-13-12 LICENSE: Creative Commons Attribution-NonCommercial-ShareAlike License http://creativecommons.org/licenses/by-nc-sa/1.0/ SYNOPSIS: Installing the at daemon. DESCRIPTION: This hint will guide you through installing the at daemon, that facilitates delayed command execution. Attachments: http://www.linuxfromscratch.org/patches/downloads/at/at-3.1.8-fixes-1.patch http://www.linuxfromscratch.org/patches/downloads/at/at-3.1.8-fcron.patch PREREQUISITES: An LFS system and sendmail and fcron from BLFS. HINT: ========= CONTENTS: ========= 1. Introduction 2. Package Dependencies 3. Package Installation Download the package Patch the package Configure the build Build the package Install the package Install the init script 4. Closing ================ 1. INTRODUCTION: ================ The at package facilitates delayed program execution. The original location is no longer available, and the package seems to be maintained by debian now. ======================== 2. PACKAGE DEPENDENCIES: ======================== At seems to depend on an MTA to report failures and such, so installing sendmail as per the BLFS book is recommended. Furthermore, it relies on a cron, and I have made the patch BLFS compliant, so that it relies on fcron. ===================== PACKAGE INSTALLATION: ===================== --------------------- Download the package: --------------------- At seems to be maintained by debian now, so download the package from: ftp://ftp.debian.org/debian/pool/main/a/at/at_3.1.8-11.tar.gz ----------------- Patch the package ----------------- patch -Np1 -i ../at-3.1.8-fixes-1.patch patch -Np1 -i ../at-3.1.8-fcron.patch -------------------- Configure the build: -------------------- The values presented here are based on a relatively clean LFS/BLFS build, and should thus be appropriate for most. However, you may want to consult ./configure --help. ./configure --prefix=/usr --with-daemon_username=nobody --with-daemon_groupname=nogroup ------------------ Build the package: ------------------ make make install chmod 755 /var/spool/fcron ------------------------ Install the init script: ------------------------ cp debian/rc /etc/rc.d/init.d/atd cat > /etc/rc.d/init.d/atd << "EOF" #!/bin/sh # Begin $rc_base/init.d/atd # Based on various other init scripts. # Rewritten by Sune Molgaard - sune@molgaard.org . /etc/sysconfig/rc . $rc_functions case "$1" in start) echo "Starting atd..." loadproc /usr/sbin/atd ;; stop) echo "Stopping atd..." killproc atd ;; restart) $0 stop sleep 1 $0 start ;; status) statusproc atd ;; *) echo "Usage: $0 {start|stop|restart|status}" exit 1 ;; esac # End $rc_base/init.d/atd EOF chmod 755 /var/spool/fcron ln -s /etc/rc.d/init.d/atd /etc/rc.d/rc0.d/K07atd ln -s /etc/rc.d/init.d/atd /etc/rc.d/rc2.d/S41atd ln -s /etc/rc.d/init.d/atd /etc/rc.d/rc3.d/S41atd ln -s /etc/rc.d/init.d/atd /etc/rc.d/rc4.d/S41atd ln -s /etc/rc.d/init.d/atd /etc/rc.d/rc5.d/S41atd ln -s /etc/rc.d/init.d/atd /etc/rc.d/rc6.d/K07atd -------- CLOSING: -------- I personally use the at package to schedule recordings of TV shows for when I am not at home. It can be used for a multitude of other scenarios where you have to schedule something to run at one specific time and date. CHANGELOG: [2004-12-05] * Initial Release [2004-12-09] * Fixed a few typos... [2004-12-09] Remembered to fill in the "Patch the package" section... [2004-12-13] Another typo fix, and remembered to fill in the date section... [2005-06-13] Became aware of the fixes patch by Jim Gifford. Included it in the hint. Changed link to fcron patch from personal site to lfs site.