apache2ctl

#!/bin/sh
#   DASH compatible.
#
# Wrap calls to apache2ctl. If necessary, build the error_log pipes
# needed by error2syslog.
#
# Replace the system apache2ctl by creating a diversion, like so:
#
# dpkg-divert --add --rename --divert /usr/sbin/apache2ctl.distrib \
#       /usr/sbin/apache2ctl
#
#
# Then install this script as /usr/sbin/apache2ctl.

ARGV="${@}"

a2c='/usr/sbin/apache2ctl.distrib'
httpd_conf='/www/etc/apache2/httpd.conf'
log_pipe_dir='/var/spool/apache2'
user='root'
group='www-data'
gawk_inc='BEGIN { IGNORECASE=1 }/^[[:space:]]*Include[[:space:]]/ {print $2}'
gawk_log='BEGIN { IGNORECASE=1 }/^[[:space:]]*ErrorLog[[:space:]]/ {print $2}'


createAccessLogPipe() {
    if ! [ -p ${log_pipe_dir}/access_log ]
    then
        mkfifo -m 0660 "${log_pipe_dir}/access_log"
    fi
}


findErrorLogs() {
    # Process Apache2 configuration files and:
    #   1) Echos ErrorLog file-paths
    #   2) processes included configurations
    local _conf _inc _log
    _conf=${1}
    for _log in $(gawk "${gawk_log}" ${_conf})
    do
        echo "${_log}"
    done
    for _inc in $(gawk "${gawk_inc}" ${_conf})
    do
        [ -e "${_inc}" ] || continue
        findErrorLogs "${_inc}"
    done
}


createErrorLogPipes() {
    # Create ErrorLog Pipes
    #   1) remove error_log directory
    #   2) create error_log directory
    #   3) create a fifo for each ErrorLog
    local _log
    rm -rf "${log_pipe_dir}/error_logs"
    mkdir -m 0770  "${log_pipe_dir}/error_logs"
    for _log in $(findErrorLogs ${httpd_conf} | sort -u)
    do
        mkfifo -m 0660 "${_log}"
    done
}

# Build error_log pipes
case ${ARGV} in
    start|restart|graceful)
        if ! [ -d ${log_pipe_dir} ]
        then
            mkdir -m 0770 "${log_pipe_dir}"
        fi
        createAccessLogPipe
        createErrorLogPipes
        chown -R ${user}:${group} "${log_pipe_dir}"
        ;;
esac

# Invoke apache2ctl
${a2c} ${ARGV}