WIP: add most parsing

   Still need to add the commands to execute the action list.

3 files changed, 137 insertions, 92 deletions

diff --git a/src/bin/systemctl.ver1 b/src/bin/systemctl.ver1
deleted file mode 100755
index 74f29c4..0000000
--- a/src/bin/systemctl.ver1
+++ /dev/null
@@ -1,65 +0,0 @@
-#!/bin/sh
-# goal: handle various systemctl commands, particularly for freeipa
-# restart X(.service)?
-# start
-# stop
-# enable
-# status
-# disable
-# mask
-# unmask
-# is-enabled
-# list-unit-files --full
-# is-active
-# reload-or-try-restart X
-# condrestart X
-# daemon-reload --system
-# --now
-
-# log all parameters to learn usage
-logfile=/var/log/systemctl.log
-printf "%s\n" "${*}" >> "${logfile}"
-
-evalparam() {
-   # call: evalparam "${_x}" "word/single/double" "${_thisparam}" "${_nextparam}"
-   printf "%s\n" "evalparam $*"
-   __paramposition="${1}"
-   __paramflaglevel="${2}"
-   __param="${3}"
-   __nextparam="${4}"
-   case "${__param}" in
-      "now") 
-   esac
-}
-
-# iterate through all parameters
-_param_count="${#}"
-_x=0
-while test ${_x} -lt ${_param_count} ;
-do
-   _x=$(( _x + 1 ))
-   eval _thisparam="\${${_x}}"
-   test ${_x} -lt ${_param_count} && eval _nextparam="\${$(( _x + 1 ))}" || unset _nextparam
-   #printf "%s\n" "param ${_x} is \"${_thisparam}\" and next is \"${_nextparam:-UNDEFINED}\""
-   case "${_thisparam}" in
-      --*)
-         #printf "%s\n" "This is a double-dash! Send the whole thing."
-         evalparam "${_x}" "double" "${_thisparam##--}" "${_nextparam:-UNDEFINED}"
-         ;;
-      -*)
-         #printf "%s\n" "This is a single dash! Send each char."
-         _i=2
-         while test ${_i} -le ${#_thisparam} ;
-         do
-            _char="$( printf '%s' "${_thisparam}" | cut -c ${_i})"
-            evalparam "${_x}" "single" "${_char}" "${_nextparam:-UNDEFINED}" "$(( _i -1 ))"
-            _i=$(( _i + 1 ))
-         done
-         unset _char
-         ;;
-      *)
-         #printf "%s\n" "No dash. Evaluate this as a word."
-         evalparam "${_x}" "word" "${_thisparam}" "${_nextparam:-UNDEFINED}"
-         ;;
-   esac
-done
diff --git a/src/etc/systemdtl.conf b/src/etc/systemdtl.conf
new file mode 100644
index 0000000..17b917f
--- /dev/null
+++ b/src/etc/systemdtl.conf
@@ -0,0 +1,2 @@
+# Part of systemdtl package
+logfile="/var/log/systemctl.log"
diff --git a/src/bin/systemctl b/src/sbin/systemctl
index 2f3201e..3f13c9d 100755
--- a/src/bin/systemctl
+++ b/src/sbin/systemctl
@@ -1,6 +1,6 @@
 #!/bin/sh
 # Filename: systemctl
-# Location: 
+# Location: /usr/sbin/
 # Author: bgstack15@gmail.com
 # Startdate: 2020-01-10 13:02:14
 # Title: 
@@ -8,14 +8,34 @@
 # Package: systemdtl
 # History: 
 # Usage: 
+#    Should be mostly like systemctl from systemd.
 # Reference: ftemplate.sh 2019-05-02a ; framework.sh 2018-05-02a
+#    man 1 systemctl
 # Improve:
+#  x restart X(.service)?
+#  x start
+#  x stop
+#  x enable
+#  x status
+#  x disable
+#  x mask
+#  x unmask
+#  x is-enabled
+#  x is-active
+#  x list-unit-files --full
+#  x reload-or-try-restart X
+#  x condrestart X
+#  x daemon-reload --system
+#  x --now
 fiversion="2019-05-02a"
 systemctlversion="2020-01-10a"
 
 usage() {
    ${PAGER:-/usr/bin/less -F} >&2 <<ENDUSAGE
 usage: systemctl [-duV] [-c conffile]
+Provides a systemctl-like interface to sysvinit. Simulates (poorly)
+various actions on services: start, stop, restart, enable, disable,
+status, mask, unmask, is-enabled, is-active, condrestart
 version ${systemctlversion}
  -d debug   Show debugging info, including parsed variables.
  -u usage   Show this usage block.
@@ -23,7 +43,7 @@ version ${systemctlversion}
  -c conf    Read in this config file.
 Return values:
  0 Normal
- 1 Help or version info displayed
+ 1 Queried service is disabled/inactive
  2 Count or type of flaglessvals is incorrect
  3 Incorrect OS type
  4 Unable to find dependency
@@ -67,8 +87,8 @@ parseFlag() {
    case ${flag} in
       # INSERT FLAGS HERE
       "d" | "debug" | "DEBUG" | "dd" ) setdebug ; ferror "debug level ${debug}" ; __debug_set_by_param=1 ;;
-      "u" | "usage" | "help" | "h" ) usage ; exit 1 ;;
-      "V" | "fcheck" | "version" ) ferror "${scriptfile} version ${systemctlversion}" ; exit 1 ;;
+      "u" | "usage" | "help" | "h" ) usage ; exit 0 ;;
+      "V" | "fcheck" | "version" ) ferror "${scriptfile} version ${systemctlversion}" ; exit 0 ;;
       #"i" | "infile" | "inputfile" ) getval ; infile1=${tempval} ;;
       "c" | "conf" | "conffile" | "config" ) getval ; conffile="${tempval}" ;;
       "now" ) export SYSTEMCTL_NOW=1 ;;
@@ -109,10 +129,10 @@ test -z "${frameworkscript}" && echo "$0: framework ${f_needed} not found. Try s
 . ${frameworkscript} || echo "$0: framework did not run properly. Continuing..." 1>&2
 infile1=
 outfile1=
-logfile=/var/log/systemctl.log
+define_if_new logfile "/var/log/systemctl.log"
 define_if_new interestedparties "bgstack15@gmail.com"
 # SIMPLECONF
-#define_if_new default_conffile "/etc/systemctl/systemctl.conf"
+define_if_new default_conffile "/etc/systemdtl.conf"
 #define_if_new defuser_conffile ~/.config/systemctl/systemctl.conf
 #define_if_new SYSTEMCTL_TMPDIR "$( mktemp -d )"
 #tmpfile1="$( TMPDIR="${SYSTEMCTL_TMPDIR}" mktemp )"
@@ -162,21 +182,21 @@ test -z "${__debug_set_by_param}" && fisnum "${SYSTEMCTL_DEBUG}" && debug="${SYS
 #   exit 2
 #fi
 
-## LOAD CONFIG FROM SIMPLECONF
-## This section follows a simple hierarchy of precedence, with first being used:
-##    1. parameters and flags
-##    2. environment
-##    3. config file
-##    4. default user config: ~/.config/script/script.conf
-##    5. default config: /etc/script/script.conf
-#if test -f "${conffile}" ;
-#then
-#   get_conf "${conffile}"
-#else
-#   if test "${conffile}" = "${default_conffile}" || test "${conffile}" = "${defuser_conffile}" ; then : ; else test -n "${conffile}" && ferror "${scriptfile}: Ignoring conf file which is not found: ${conffile}." ; fi
-#fi
-#test -f "${defuser_conffile}" && get_conf "${defuser_conffile}"
-#test -f "${default_conffile}" && get_conf "${default_conffile}"
+# LOAD CONFIG FROM SIMPLECONF
+# This section follows a simple hierarchy of precedence, with first being used:
+#    1. parameters and flags
+#    2. environment
+#    3. config file
+#    4. default user config: ~/.config/script/script.conf
+#    5. default config: /etc/script/script.conf
+if test -f "${conffile}" ;
+then
+   get_conf "${conffile}"
+else
+   if test "${conffile}" = "${default_conffile}" || test "${conffile}" = "${defuser_conffile}" ; then : ; else test -n "${conffile}" && ferror "${scriptfile}: Ignoring conf file which is not found: ${conffile}." ; fi
+fi
+test -f "${defuser_conffile}" && get_conf "${defuser_conffile}"
+test -f "${default_conffile}" && get_conf "${default_conffile}"
 
 # CONFIGURE VARIABLES AFTER PARAMETERS
 
@@ -223,7 +243,7 @@ test -z "${__debug_set_by_param}" && fisnum "${SYSTEMCTL_DEBUG}" && debug="${SYS
 # SET TRAPS
 #trap "CTRLC" 2
 #trap "CTRLZ" 18
-trap '__ec=$? ; clean_systemctl ; trap "" 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ; exit ${__ec} ;' 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
+#trap '__ec=$? ; clean_systemctl ; trap "" 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ; exit ${__ec} ;' 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
 
 # DEBUG SIMPLECONF
 debuglev 5 && {
@@ -234,7 +254,7 @@ debuglev 5 && {
 
 # MAIN LOOP
 #{
-   #printf "%s\n" "${*}" >> "${logfile}"
+   printf "%s\n" "${*}" >> "${logfile}"
    #echo "thiscount=${thiscount}"
    #x=1
    #while test ${x:-${thiscount}} -le $(( thiscount - 1 )) && test ${thiscount} -gt 1 ;
@@ -247,7 +267,12 @@ debuglev 5 && {
    # actions
    actionlist=""
    case "${action}" in
-      start|stop|status)
+
+      restart|start|stop|status|reload|condrestart|try-restart|reload-or-try-restart)
+         # re-map a few actions
+         case "${action}" in
+            "reload-or-try-restart") action=restart ;;
+         esac
          x=1
          while test ${x:-${thiscount}} -le $(( thiscount - 1 )) && test ${thiscount} -gt 1 ;
          do
@@ -258,12 +283,95 @@ debuglev 5 && {
             x=$(( x + 1 ))
          done
          ;;
-      enable|disable)
-         # action should be update-rc.d ${thisopt} ${action}
-         echo "WORK IN PROGRESS"
+
+      enable|disable|mask|unmask)
+         case "${action}" in
+            mask) action=disable ;;
+            unmask) action=enable ;;
+         esac
+         x=1
+         while test ${x:-${thiscount}} -le $(( thiscount - 1 )) && test ${thiscount} -gt 1 ;
+         do
+            eval thisopt="\${opt${x}}"
+            thisopt="$( echo "${thisopt}" | sed -r -e 's/\.service$//;' )"
+            actionstatement="$( printf "%s" "update-rc.d ${thisopt} ${action};" )"
+            actionlist="${actionlist:+${actionlist} }${actionstatement}"
+            test "${SYSTEMCTL_NOW}" = "1" && {
+               case "${action}" in
+                  enable)
+                     nowaction=start
+                     ;;
+                  disable)
+                     nowaction=stop
+                     ;;
+               esac
+               actionstatement="$( printf "%s" "service ${thisopt} ${nowaction:-stop};" )"
+               actionlist="${actionlist:+${actionlist} }${actionstatement}"
+            }
+            x=$(( x + 1 ))
+         done
+         ;;
+
+      daemon-reload)
+         debuglev 1 && echo "${action} is a NOP."
          ;;
+
+      list-unit-files)
+         # Future improvement: can consume --full, but I do not care enough to deal with it now.
+         ls -Al /etc/init.d
+         ;;
+
+      is-enabled)
+         currentrunlevel="$( who -r | grep -oE 'run-level\s+[[:digit:]]+' | awk '{print $NF}' )"
+         responsenumber=1
+
+         # loop through each service on the command line
+         x=1
+         while test ${x:-${thiscount}} -le $(( thiscount - 1 )) && test ${thiscount} -gt 1 ;
+         do
+            eval thisopt="\${opt${x}}"
+            thisopt="$( echo "${thisopt}" | sed -r -e 's/\.service$//;' )"
+            #actionstatement="$( printf "%s" "service ${thisopt} ${action};" )"
+            scriptfile="$( find "/etc/rc${currentrunlevel}.d" -mindepth 1 -maxdepth 1 -name "S??${thisopt}" 2>/dev/null )"
+            responsetext="disabled"
+            # if file exists, let us return 0.
+            if test -n "${scriptfile}" ;
+            then
+               debuglev 2 && echo "${scriptfile}"
+               responsenumber=0 # any "enabled" response makes systemctl return 0
+               responsetext="enabled"
+            fi
+            echo "${responsetext:-UNKNOWN}"
+            x=$(( x + 1 ))
+         done
+         exit "${responsenumber}"
+         ;;
+
+      is-active)
+         responsenumber=3
+         x=1
+         while test ${x:-${thiscount}} -le $(( thiscount - 1 )) && test ${thiscount} -gt 1 ;
+         do
+            eval thisopt="\${opt${x}}"
+            thisopt="$( echo "${thisopt}" | sed -r -e 's/\.service$//;' )"
+            #actionstatement="$( printf "%s" "service ${thisopt} ${action};" )"
+            servicestatus="$( service "${thisopt}" status 1>/dev/null 2>&1 ; echo "${?}" )"
+            responsetext="stopped"
+            # if file exists, let us return 0.
+            if test ${servicestatus:-1} -eq 0 ;
+            then
+               responsenumber=0
+               responsetext="active"
+            fi
+            echo "${responsetext:-unknown}"
+            x=$(( x + 1 ))
+         done
+         exit "${responsenumber}"
+         ;;
+
       *)
          ferror "Fatal! 2. Unable to understand action ${action}. Aborted."
+         exit 2
          ;;
    esac