nagios-nrpe/macros

autoconf-macros README

Sections below are: Purpose, Contents, Usage, References

##Purpose

The purpose of Nagios autoconf-macros is to have a central place for autoconf macros that can be maintained in one place, but be used by any of the Nagios software. It is intended to be used as a git subtree. See the Usage and References section below.

Since this project will be included in several parent projects, any changes must be as project-neutral as possible.

Contents

The collection consists of the following macros:

AX_NAGIOS_GET_OS alias AC_NAGIOS_GET_OS

Output Variable : opsys

This macro detects the operating system, and transforms it into a generic label. The most common OS's that use Nagios software are recognized and used in subsequent macros.

AX_NAGIOS_GET_DISTRIB_TYPE alias AC_NAGIOS_GET_DISTRIB_TYPE

Output Variables : dist_type, dist_ver

This macro detects the distribution type. For Linux, this would be rh (for Red Hat and derivatives), suse (OpenSUSE, SLES, derivatives), gentoo (Gentoo and derivatives), debian (Debian and derivatives), and so on. For BSD, this would be openbsd, netbsd, freebsd, dragonfly, etc. It can also be aix, solaris, osx, and so on for Unix operating systems.

AX_NAGIOS_GET_INIT alias AC_NAGIOS_GET_INIT

Output Variable : init_type

This macro detects what software is used to start daemons on bootup or on request, generally knows as the "init system". The init_type will generally be one of sysv (many), bsd (Slackware), newbsd (*BSD), launchd (OS X), smf10 or smf11 (Solaris), systemd (newer Linux), gentoo (older Gentoo), upstart (several), or unknown.

AX_NAGIOS_GET_INETD alias AC_NAGIOS_GET_INETD

Output Variable : inetd_type

This macro detects what software is used to start daemons or services on demand, which historically has been "inetd". The inetd_type will generally be one of inetd, xinetd, launchd (OS X), smf10 or smf11 (Solaris), systemd (newer Linux), upstart (several), or unknown.

AX_NAGIOS_GET_PATHS alias AC_NAGIOS_GET_PATHS

Output Variables : many!

This macro determines the installation paths for binaries, config files, PID files, and so on. For a "standard" install of Nagios, NRPE, NDO Utils, etc., most will be in the /usr/local/nagios hierarchy with startup files located in /etc. For distributions or software repositories, the "--enable-install-method=os" option can be used. This will determine the O/S dependant directories, such as /usr/bin, /usr/sbin, /var/lib/nagios, /usr/lib/nagios, etc. or for OS X, /Library/LaunchDaemons.

AX_NAGIOS_GET_FILES alias AC_NAGIOS_GET_FILES

Output Variables : src_init, src_inetd, src_tmpfile

Each Nagios project will have a top-level directory named "/startup/". In that directory will be "*.in" files for the various "init_type" and "inetd_type" systems. This macro will determine which file(s) from that directory will be needed.

AX_NAGIOS_GET_SSL alias AC_NAGIOS_GET_SSL

Output Variables : HAVE_KRB5_H, HAVE_SSL, SSL_INC_DIR, SSL_LIB_DIR, CFLAGS, LDFLAGS, LIBS

This macro checks various directories for SSL libraries and header files. The searches are based on known install locations on various operating systems and distributions, for openssl, gnutls-openssl, and nss_compat_ossl. If it finds the headers and libraries, it will then do an AC_LINK_IFELSE on a simple program to make sure a compile and link will work correctly.

Usage

This repo is intended to be used as a git subtree, so changes will automatically propagate, and still be reasonably easy to use.

• First, Create, checkout, clone, or branch your project. If you do an ls -AF it might look something like this:

       .git/      .gitignore    ChangeLog   LICENSE   Makefile.in
       README     configure.ac  include/    src/
  

• Then make a reference to this project inside your project.

       git remote add autoconf-macros git@github.com:NagiosEnterprises/autoconf-macros
       git subtree add --prefix=macros/ autoconf-macros master
  

• After executing the above two commands, if you do an ls -AF now, it should look like this:

       .git/      .gitignore    ChangeLog   LICENSE   Makefile.in
       README     configure.ac  include/    macros/   src/
  

The macros/ directory has been added.

• Now do a git push to save everything.

• If you make any changes to autoconf-macros, commit them separately from any parent-project changes to keep from polluting the commit history with unrelated comments.

• To submit your changes to autoconf-macros:

       git subtree push --prefix=macros autoconf-macros peters-updates
  

This will create a new branch called peters-updates. You then need to create a pull request to get your changes merged into autoconf-macros master.

• To get the latest version of autoconf-macros into your parent project:

       git subtree pull --squash --prefix=macros autoconf-macros master
  

References

Now that autoconf-macros is available to your project, you will need to reference it.

• Create (or add these lines to) file YourProject/aclocal.m4

       m4_include([macros/ax_nagios_get_os])
       m4_include([macros/ax_nagios_get_distrib])
       m4_include([macros/ax_nagios_get_init])
       m4_include([macros/ax_nagios_get_inetd])
       m4_include([macros/ax_nagios_get_paths])
       m4_include([macros/ax_nagios_get_files])
       m4_include([macros/ax_nagios_get_ssl])
  

• In your YourProject/configure.ac add the following lines. A good place to put them would be right after any AC_PROG_* entries:

       AC_NAGIOS_GET_OS
       AC_NAGIOS_GET_DISTRIB_TYPE
       AC_NAGIOS_GET_INIT
       AC_NAGIOS_GET_INETD
       AC_NAGIOS_GET_PATHS
       AC_NAGIOS_GET_FILES
  

• If you need SSL functionality, add the following to YourProject/configure.ac where you want to check for SSL:

       AC_NAGIOS_GET_SSL
  

• You will now be able to reference any of the variables in config.h.in and any files listed in the AC_CONFIG_FILES macro in configure.ac.