New parser: apache2ctl -S

[chriscroome]

This is one for the back burner!

The output from apache2ctl -S looks like a suitable candidate for conversion into JSON, this is what I have on a development server:

apache2ctl -S

VirtualHost configuration:
127.0.0.1:80           localhost (/etc/apache2/sites-enabled/localhost.conf:4)
*:80                   is a NameVirtualHost
         default server wsh.webarchitects.org.uk (/etc/apache2/conf-enabled/webarch.conf:113)
         port 80 namevhost wsh.webarchitects.org.uk (/etc/apache2/conf-enabled/webarch.conf:113)
                 alias www.wsh.webarchitects.org.uk
         port 80 namevhost nextcloud.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/cloud.conf:22)
                 alias cloud.wsh.webarchitects.org.uk
                 alias www.nextcloud.wsh.webarchitects.org.uk
         port 80 namevhost nextcloud2.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/cloud2.conf:22)
         port 80 namevhost foobar.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/foobar.conf:22)
                 alias cgi.foobar.wsh.webarchitects.org.uk
                 alias foo.foobar.wsh.webarchitects.org.uk
                 alias bar.foobar.wsh.webarchitects.org.uk
         port 80 namevhost fcgi.foobar.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/foobar.conf:110)
         port 80 namevhost php.foobar.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/foobar.conf:184)
         port 80 namevhost mautic.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/mautic.conf:22)
         port 80 namevhost moodle.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/moodle.conf:22)
         port 80 namevhost phpmyadmin.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/phpmyadmin.conf:22)
         port 80 namevhost stats.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/stats.conf:22)
         port 80 namevhost time.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/time.conf:22)
                 alias www.time.wsh.webarchitects.org.uk
                 alias time.wsh.webarch.org.uk
                 alias www.time.wsh.webarch.org.uk
         port 80 namevhost weblog.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/weblog.conf:22)
                 alias blog.wsh.webarch.org.uk
                 alias blog.wsh.webarchitects.org.uk
                 alias weblog.wsh.webarch.org.uk
         port 80 namevhost wiki.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/wiki.conf:22)
                 alias www.mediawiki.wsh.webarchitects.org.uk
                 alias wiki.mediawiki.wsh.webarchitects.org.uk
*:443                  is a NameVirtualHost
         default server wsh.webarchitects.org.uk (/etc/apache2/conf-enabled/webarch.conf:152)
         port 443 namevhost wsh.webarchitects.org.uk (/etc/apache2/conf-enabled/webarch.conf:152)
                 alias www.wsh.webarchitects.org.uk
         port 443 namevhost nextcloud.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/cloud.conf:42)
                 alias cloud.wsh.webarchitects.org.uk
                 alias www.nextcloud.wsh.webarchitects.org.uk
         port 443 namevhost nextcloud2.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/cloud2.conf:35)
         port 443 namevhost foobar.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/foobar.conf:45)
                 alias cgi.foobar.wsh.webarchitects.org.uk
                 alias foo.foobar.wsh.webarchitects.org.uk
                 alias bar.foobar.wsh.webarchitects.org.uk
         port 443 namevhost fcgi.foobar.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/foobar.conf:123)
         port 443 namevhost php.foobar.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/foobar.conf:197)
         port 443 namevhost mautic.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/mautic.conf:35)
         port 443 namevhost moodle.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/moodle.conf:35)
         port 443 namevhost phpmyadmin.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/phpmyadmin.conf:35)
         port 443 namevhost stats.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/stats.conf:35)
         port 443 namevhost time.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/time.conf:45)
                 alias www.time.wsh.webarchitects.org.uk
                 alias time.wsh.webarch.org.uk
                 alias www.time.wsh.webarch.org.uk
         port 443 namevhost weblog.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/weblog.conf:45)
                 alias blog.wsh.webarch.org.uk
                 alias blog.wsh.webarchitects.org.uk
                 alias weblog.wsh.webarch.org.uk
         port 443 namevhost wiki.wsh.webarchitects.org.uk (/etc/apache2/sites-enabled/wiki.conf:42)
                 alias www.mediawiki.wsh.webarchitects.org.uk
                 alias wiki.mediawiki.wsh.webarchitects.org.uk
ServerRoot: "/etc/apache2"
Main DocumentRoot: "/var/www/html"
Main ErrorLog: "/var/log/apache2/error.log"
Mutex fcgid-proctbl: using_defaults
Mutex ssl-stapling: using_defaults
Mutex proxy: using_defaults
Mutex ssl-cache: using_defaults
Mutex default: dir="/var/run/apache2/" mechanism=default 
Mutex fcgid-pipe: using_defaults
Mutex watchdog-callback: using_defaults
Mutex rewrite-map: using_defaults
Mutex ssl-stapling-refresh: using_defaults
PidFile: "/var/run/apache2/apache2.pid"
Define: DUMP_VHOSTS
Define: DUMP_RUN_CFG
User: name="www-data" id=33
Group: name="www-data" id=33
ChrootDir: "/chroots/www-data"

I guess the first thing to do would be to track down the code that generates this output, this is the content of /usr/sbin/apache2ctl on Debian:

#!/bin/sh
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
#
# Apache control script designed to allow an easy command line interface
# to controlling Apache.  Written by Marc Slemko, 1997/08/23
#
# Heavily modified for Debian by Stefan Fritsch 2007-2010
# 
# The exit codes returned are:
#   XXX this doc is no longer correct now that the interesting
#   XXX functions are handled by httpd
#	0 - operation completed successfully
#	1 - 
#	2 - usage error
#	3 - httpd could not be started
#	4 - httpd could not be stopped
#	5 - httpd could not be started during a restart
#	6 - httpd could not be restarted during a restart
#	7 - httpd could not be restarted during a graceful restart
#	8 - configuration syntax error
#
# When multiple arguments are given, only the error from the _last_
# one is reported.  Run "apachectl help" for usage info
#
ARGV="$@"
#
# |||||||||||||||||||| START CONFIGURATION SECTION  ||||||||||||||||||||
# --------------------                              --------------------
#
# main configuration directory
if test -z "$APACHE_CONFDIR" ; then
	if test "${0##*apache2ctl-}" != "$0" ; then
		APACHE_CONFDIR="/etc/apache2-${0##*apache2ctl-}"
	else
		APACHE_CONFDIR=/etc/apache2
	fi
fi

SUFFIX="${APACHE_CONFDIR##/etc/apache2-}"
case "$SUFFIX" in
	/etc/apache2)
		SUFFIX=""
		;;
	*)
		SUFFIX="@$SUFFIX"
		;;
esac
APACHE_SYSTEMD_SERVICE="apache2$SUFFIX"

# the path to the environment variable file
test -z "$APACHE_ENVVARS" && APACHE_ENVVARS="$APACHE_CONFDIR/envvars"
# pick up any necessary environment variables
if test -f $APACHE_ENVVARS; then
  . $APACHE_ENVVARS
fi

if test "$APACHE_CONFDIR" != /etc/apache2 ; then
	APACHE_ARGUMENTS="-d $APACHE_CONFDIR $APACHE_ARGUMENTS"
fi
# the following APACHE_* variables should be set in /etc/apache2/envvars
#
# the path to your httpd binary, including options if necessary
HTTPD=${APACHE_HTTPD:-/usr/sbin/apache2}
#
# a command that outputs a formatted text version of the HTML at the
# url given on the command line.  Designed for lynx, however other
# programs may work.  
LYNX="${APACHE_LYNX:-www-browser -dump}"
#
# the URL to your server's mod_status status page.  If you do not
# have one, then status and fullstatus will not work.
STATUSURL="${APACHE_STATUSURL:-http://localhost:80/server-status}"
#
# Set this variable to a command that increases the maximum
# number of file descriptors allowed per child process. This is
# critical for configurations that use many file descriptors,
# such as mass vhosting, or a multithreaded server.
ULIMIT_MAX_FILES="${APACHE_ULIMIT_MAX_FILES:-ulimit -n 8192}"
# --------------------                              --------------------
# ||||||||||||||||||||   END CONFIGURATION SECTION  ||||||||||||||||||||

# Set the maximum number of file descriptors allowed per child process.
if [ "x$ULIMIT_MAX_FILES" != "x" ] && [ `id -u` -eq 0 ] ; then
    if ! $ULIMIT_MAX_FILES ; then
        echo Setting ulimit failed. See README.Debian for more information. >&2
    fi
fi

ERROR=0
if [ "x$ARGV" = "x" ] || [ "x$ARGV" = "xusage" ] || [ "x$ARGV" = "xhelp" ] || [ "x$ARGV" = "x--help" ]; then 
    echo "Usage: $0 start|stop|restart|graceful|graceful-stop|configtest|status|fullstatus|help" >&2
    echo "       $0 <apache2 args>" >&2
    echo "       $0 -h            (for help on <apache2 args>)" >&2
    exit 1
fi

get_status () {
    if ! $LYNX $STATUSURL ; then
        echo "'$LYNX $STATUSURL'" failed. >&2
        echo Maybe you need to install a package providing www-browser or you >&2
        echo need to adjust the APACHE_LYNX variable in /etc/apache2/envvars >&2
        exit 1
    fi
}

mkdir_chown () {
    local OWNER="$1"
    local DIR="$2"
    local STAT="$(LC_ALL=C stat -c %F:%U $DIR 2> /dev/null || true)"
    if [ "$STAT" = "" ] ; then
        local TMPNAME=$(mktemp -d $DIR.XXXXXXXXXX) || exit 1
        chmod 755 $TMPNAME || exit 1
        chown $OWNER $TMPNAME || exit 1
        if ! mv -T $TMPNAME $DIR 2> /dev/null; then
            rmdir $TMPNAME
            # check for race with other apachectl
            if [ "$(LC_ALL=C stat -c %F:%U $DIR 2>/dev/null)" != "directory:$OWNER" ]
            then
                echo Cannot create $DIR with owner $OWNER.
                echo Please fix manually. Aborting.
                exit 1
            fi
        fi
    elif [ "$STAT" != "directory:$OWNER" ] ; then
        echo $DIR already exists but is not a directory owned by $OWNER.
        echo Please fix manually. Aborting.
        exit 1
    fi
}


[ ! -d ${APACHE_RUN_DIR:-/var/run/apache2} ] && mkdir -p ${APACHE_RUN_DIR:-/var/run/apache2}
[ ! -d ${APACHE_RUN_DIR:-/var/run/apache2}/socks ] && mkdir_chown ${APACHE_RUN_USER:-www-data} ${APACHE_RUN_DIR:-/var/run/apache2}/socks
[ ! -d ${APACHE_LOCK_DIR:-/var/lock/apache2} ] && mkdir_chown ${APACHE_RUN_USER:-www-data} ${APACHE_LOCK_DIR:-/var/lock/apache2}

case "$ARGV" in
start)
    # ssl_scache shouldn't be here if we're just starting up.
    # (this is bad if there are several apache2 instances running)
    rm -f ${APACHE_RUN_DIR:-/var/run/apache2}/*ssl_scache*

    need_systemd=false
    if [ -z "$APACHE_STARTED_BY_SYSTEMD" ] ; then
        case "$(readlink -f /proc/1/exe)" in
        *systemd*)
            need_systemd=true
            ;;
        *)
            ;;
        esac
    fi
    if $need_systemd ; then
        # If running on systemd we should not start httpd without systemd
        # or systemd will get confused about the status of httpd.
        echo "Invoking 'systemctl start $APACHE_SYSTEMD_SERVICE'."
        echo "Use 'systemctl status $APACHE_SYSTEMD_SERVICE' for more info."
        systemctl start "$APACHE_SYSTEMD_SERVICE"
    else
        unset APACHE_STARTED_BY_SYSTEMD
        $HTTPD ${APACHE_ARGUMENTS} -k "$ARGV"
    fi

    ERROR=$?
    ;;
stop|graceful-stop)
    $HTTPD ${APACHE_ARGUMENTS} -k "$ARGV"
    ERROR=$?
    ;;
restart|graceful)
    if $HTTPD ${APACHE_ARGUMENTS} -t 2> /dev/null ; then
        $HTTPD ${APACHE_ARGUMENTS} -k "$ARGV"
    else
        $HTTPD ${APACHE_ARGUMENTS} -t
    fi
    ERROR=$?
    ;;
startssl|sslstart|start-SSL)
    echo The startssl option is no longer supported.
    echo Please edit httpd.conf to include the SSL configuration settings
    echo and then use "apachectl start".
    ERROR=2
    ;;
configtest)
    $HTTPD ${APACHE_ARGUMENTS} -t
    ERROR=$?
    ;;
status)
    get_status | awk ' /process$/ { print; exit } { print } '
    ;;
fullstatus)
    get_status
    ;;
*)
    $HTTPD ${APACHE_ARGUMENTS} "$@"
    ERROR=$?
esac

if [ "$ERROR" != 0 ] ; then
	echo Action \'"$@"\' failed.
	echo The Apache error log may have more information.
fi
exit $ERROR

And I'm afraid to say I can't see the source of the output is here, there is some usage output with -h:

apache2ctl -h
Usage: /usr/sbin/apache2 [-D name] [-d directory] [-f file]
                         [-C "directive"] [-c "directive"]
                         [-k start|restart|graceful|graceful-stop|stop]
                         [-v] [-V] [-h] [-l] [-L] [-t] [-T] [-S] [-X]
Options:
  -D name            : define a name for use in <IfDefine name> directives
  -d directory       : specify an alternate initial ServerRoot
  -f file            : specify an alternate ServerConfigFile
  -C "directive"     : process directive before reading config files
  -c "directive"     : process directive after reading config files
  -e level           : show startup errors of level (see LogLevel)
  -E file            : log startup errors to file
  -v                 : show version number
  -V                 : show compile settings
  -h                 : list available command line options (this page)
  -l                 : list compiled in modules
  -L                 : list available configuration directives
  -t -D DUMP_VHOSTS  : show parsed vhost settings
  -t -D DUMP_RUN_CFG : show parsed run settings
  -S                 : a synonym for -t -D DUMP_VHOSTS -D DUMP_RUN_CFG
  -t -D DUMP_MODULES : show all loaded modules 
  -M                 : a synonym for -t -D DUMP_MODULES
  -t -D DUMP_INCLUDES: show all included configuration files
  -t                 : run syntax check for config files
  -T                 : start without DocumentRoot(s) check
  -X                 : debug mode (only one worker, do not detach)
Action '-h' failed.
The Apache error log may have more information.

The results from apache2ctl -t -D DUMP_VHOSTS -D DUMP_RUN_CFG match the result using -S.