#!/bin/bash
# Simona Pisano - 2018-11-27
# simona-scripts
# Libertamente utilizzabile sotto GPL v3


if [[ $1 == "-h" || $1 == "--help" ]] ; then

  cat << EOF
macinstall command help

Imagine you want install arch linux one time and that clone on all disk
ad pc you have. But you should have some different file that differ from
one installation to another. This command help you to manage this.

Imagine you have your /etc/macinstall.d/yourpc* with all files/folder
like:
  /etc/macinstall.d/yourpc1/etc/fstab
  /etc/macinstall.d/yourpc1/boot/grug/grub.cfg
  /etc/macinstall.d/yourpc1/etc/machine-id
  /etc/macinstall.d/yourpc1/etc/hostname
  /etc/macinstall.d/yourpc1/etc/ssh/host_*
  /etc/macinstall.d/yourpc1/..
A second install like
  /etc/macinstall.d/yourpc2/etc/fstab
  /etc/macinstall.d/yourpc2/boot/grug/grub.cfg
  /etc/macinstall.d/yourpc2/etc/machine-id
  /etc/macinstall.d/yourpc2/etc/hostname
  /etc/macinstall.d/yourpc2/etc/ssh/host_*
  /etc/macinstall.d/yourpc2/etc/..
A config file with sessione [yourpc1] and [yourpc2] (edit yourself
macinstall.conf)
  /etc/macinstall.d/macinstall.conf
with:
  [yourpc1]
  CopyFilesNum=5
  CopyFile1=/etc/fstab
  CopyFile2=/boot/grub/grub.cfg
  CopyFile3=/etc/grub.d/40_custom
  CopyFile4=/etc/hostname
  CopyFile5=/etc/machine-id
  CopyDirectoriesNum=1
  CopyDirectory1=/etc/ssh
  WriteSemaphore=yes
  AllowOnlyIfPreviousMacIs=yourpc2
and
  [yourpc2]
  CopyFilesNum=5
  CopyFile1=/etc/fstab
  CopyFile2=/boot/grub/grub.cfg
  CopyFile3=/etc/grub.d/40_custom
  CopyFile4=/etc/hostname
  CopyFile5=/etc/machine-id
  CopyDirectoriesNum=1
  CopyDirectory1=/etc/ssh
  WriteSemaphore=yes
  AllowOnlyIfPreviousMacIs=yourpc1
And finally a command like to switch from one system to another
  macinstall yourpc1 ---this-is-not-an-exercise
  macinstall yourpc2 ---this-is-not-an-exercise
And a semaphore file like
  /etc/macinstall.d/CurrentSystem-yourpc1
or
  /etc/macinstall.d/CurrentSystem-yourpc2

Summary usage
  macinstall [-i --info none] [--help|-h] [--version] name-install
    [local-import]

Option parameters
  --help -h                    -> this help page
  -i --info or blank           -> who am i looking semaphore file
  --version                    -> output version information and exit
  -y --ask-confirm             -> ask confirm before proceeed
  ---this-is-not-an-exercise   -> force real work. without this
                                  none is really done. this is a
                                  secure check.
  ---no-test                   -> use dest / instead $USER/test

Path used
  /etc/macinstall.d                       -> contains all single
     install related files (example fstab grub.cfg machine-id...)
  /usr/bin/macinstall                     -> this command itself
  /etc/macinstall-d/CurrentSystem-pcname  -> semaphore of installed
     system (touch bank file)

Example
  A file /etc/macinstall.d/macinstall.conf with some demo config
  is already supplyed.

Packages required
  sed sudo

Cfg file used
  /etc/macinstall.d/macinstall.conf

EOF

  exit 0
elseif [[ $1 == "--version" ]]
  echo "macinstall Version 0.0"
  exit 0
fi

#
## who am I
#
path_prefix_system_semaphore="/etc/macinstall.d/CurrentSystem-"
#path_prefix_system_semaphore="/home/simona/My Work/my-pkg simonascripts/root-test/etc/CurrentSystem-"
if [[ $1 == "" || $1 == "-i" || $1 == "--info" ]] ; then
  numSem=`ls "$path_prefix_system_semaphore"* 2> /dev/null | wc -l`
  case $numSem in
   1) currSystem=`ls -1 "$path_prefix_system_semaphore"* 2> /dev/null`
      currSystem="${currSystem:${#path_prefix_system_semaphore}:${#currSystem}-${#path_prefix_system_semaphore}}"
      echo "I am $currSystem"
      ;;
   0) echo "Can't detect current system."
      ;;
   *) echo "Ambiguous CurrentSystem ($numSem)!!!"
      ;;
  esac
fi

[[ ! -r /bin/sed ]] && { echo -e "$ERR Missing sed utility! Exit"; exit 1; }
[[ ! -r /bin/sudo ]] && { echo -e "$ERR Missing sudo utility! Exit"; exit 1; }

[[ $1 != "" ]] && install_macname=$1 || exit 0
#[[ $1 != "" ]] && install_macname=$1 || { echo "Please insert install name as first command parameter!!"; exit 0; }

runLocalImport=false
[[ $2 == "local-import" ]] && runLocalImport=true

flagNoTest=false
flagForceRealWork=false
flagAskConfirm=false
while [ $# -ne 0 ] ; do
  case $1 in
    -y|--ask-confirm) flagAskConfirm=true ;;
    ---this-is-not-an-exercise) flagForceRealWork=true;;
    ---no-test) flagNoTest=true;;
    *) ;;
  esac
  shift
done

#color	Foreground	Background
#black	30	40
#red	31	41
#green	32	42
#yellow	33	43
#blue	34	44
#magenta	35	45
#cyan	36	46
#white	37	47
EchoReset="\e[0m"
echo -e -n "$EchoReset"
OK="\E[32;40m[OK]${EchoReset}"
WARN="\E[33;40m[WARN]${EchoReset}"
ERR="\E[31;40m[ERR]${EchoReset}"
#echo -e "$OK $WARN $ERR"

#path_cfg must be '/' terminated
filename_cfg="macinstall.conf"
path_cfg="/etc/macinstall.d/"
[[ ${path_cfg:${#path_cfg}-1:1} != "/" ]] && path_cfg="$path_cfg/" #if last char is not '/' add it
if [[ ! -d $path_cfg ]] ; then
  mkdir -p $path_cfg
  [[ $? -ne 0 ]] && { echo -e "$ERR Fail '$path_cfg' mkdir cmd creation !!"; exit 1; }
fi
if [[ ! -r $path_cfg$filename_cfg ]] ; then
  touch $path_cfg$filename_cfg
  [[ $? -ne 0 ]] && { echo -e "$ERR Fail '$path_cfg$filename_cfg' touch cmd creation !!"; exit 1; }
fi

#path_dest must be '/' terminated
path_dest="$HOME/test/"
[[ "$flagNoTest" == true ]] && { echo "$WARN Using real path / for destination..."; path_dest="/"; }
[[ ${path_dest:${#path_dest}-1:1} != "/" ]] && path_dest="$path_dest/" #if last char is not '/' add it
if [[ ! -d $path_dest ]] ; then
  [[ ${path_dest:0:5} == "/home" && ! -d "/home" ]] && { echo "$ERR Path '/home' missing. (For / use) Exit."; exit 1; }
  mkdir -p $path_dest
  [[ $? -ne 0 ]] && { echo -e "$ERR Fail $path_dest mkdir cmd creation !!"; exit 1; }
fi

postfix_bak_file_name=".bak"

#cfg related
prop_cfg_file_copy_num="CopyFilesNum"
prop_cfg_dir_copy_num="CopyDirectoriesNum"
prop_cfg_rm_num="RmNum"

prop_cfg_file_copy="CopyFile"
prop_cfg_dir_copy="CopyDirectory"
prop_cfg_rm="Rm"

prop_cfg_write_sem="WriteSemaphore"
prop_cfg_read_sem="AllowOnlyIfPreviousMacIs"

if [[ "$flagAskConfirm" == true ]] ; then
  echo -n "Continue? (Y/N): "; read ask
  [[ ! $ask =~ ^(yes|y|YES|y|s|S|si|SI|sì)$ ]] && { echo "Exit forced by user."; exit 0; }
fi

number_files=`sed -nr "/^\[$install_macname\]/ { :l /^$prop_cfg_file_copy_num[ ]*=/ { s/.*=[ ]*//; p; q;}; n; b l;}" $path_cfg$filename_cfg`
number_directories=`sed -nr "/^\[$install_macname\]/ { :l /^$prop_cfg_dir_copy_num[ ]*=/ { s/.*=[ ]*//; p; q;}; n; b l;}" $path_cfg$filename_cfg`
number_rm=`sed -nr "/^\[$install_macname\]/ { :l /^$prop_cfg_rm_num[ ]*=/ { s/.*=[ ]*//; p; q;}; n; b l;}" $path_cfg$filename_cfg`

ok_write_semaphore=`sed -nr "/^\[$install_macname\]/ { :l /^$prop_cfg_write_sem[ ]*=/ { s/.*=[ ]*//; p; q;}; n; b l;}" $path_cfg$filename_cfg`
[[ $ok_write_semaphore == "" ]] && ok_write_semaphore="yes" #default
[[ $ok_write_semaphore != "yes" && $ok_write_semaphore != "no" ]] && ok_write_semaphore="yes" #default

#Check cfg file integrity
if [[ $number_files -lt 1 && $number_directories -lt 1 && $number_rm -lt 1 ]] ; then
  echo -e "$ERR $filename_cfg: None to do!!! 'CopyFilesNum' or 'CopyDirectoriesNum' or 'RmNum' not correctly defined. Please modify cfg."
  exit 1
fi

if [[ $number_files -gt 0 ]] ; then
  for (( counter=1; counter <= $number_files; counter++ )) ; do
    dupe=`sed -nr "/^\[$install_macname\]/ { :l /^$prop_cfg_file_copy$counter[ ]*=/ { s/.*=[ ]*//; p; q;}; n; b l;}" $path_cfg$filename_cfg`
    [[ $dupe == "" ]] && { echo -e "$ERR $filename_cfg: '$prop_cfg_file_copy$counter' not found inside cfg. Fix cfg!!"; exit 1; }
    [[ ! -r $path_cfg$install_macname$dupe ]] && { echo -e "$ERR File '$path_cfg$install_macname$dupe' defined in config but not found!"; exit 1; }

    #prepare destination creatinf directory if required
    #remove starting '/' if exist
    [[ ${dupe:0:1} == "/" ]] && dupe=${dupe:1:${#dupe}-1}
    # extract path from $dupe and mkdir -p it
    dupeFilename=${dupe##*/} #extract froms tring all is over last '/' (filename)
    dupePath=${dupe:0:${#dupe}-${#dupeFilename}} #extract path (remove filename cutting string)
    #echo "filename=$dupeFilename path=$path_dest$dupePath" #debug
    if [[ ! -d "$path_dest$dupePath" ]] ; then
      mkdir -p "$path_dest$dupePath"
      if [[ $? -ne 0 ]] ; then
        sudo mkdir -p "$path_dest$dupePath"
        [[ $? -ne 0 ]] && { echo -e "$WARN Fail generating directory '$path_dest$dupePath'. Exit."; exit 1; }
      fi
    fi
  done
fi

if [[ $number_directories -gt 0 ]] ; then
  for (( counter=1; counter <= $number_directories; counter++ )) ; do
    dupe=`sed -nr "/^\[$install_macname\]/ { :l /^$prop_cfg_dir_copy$counter[ ]*=/ { s/.*=[ ]*//; p; q;}; n; b l;}" $path_cfg$filename_cfg`
    [[ $dupe == "" ]] && { echo -e "$ERR $filename_cfg: '$prop_cfg_dir_copy$counter' not found inside cfg. Fix cfg!!"; exit 1; }
    [[ ! -d $path_cfg$install_macname$dupe ]] && { echo -e "$ERR Directory '$path_cfg$install_macname$dupe' defined in config but not found!"; exit 1; }

    #prepare destination creating directory if required
    #remove starting '/' if exist
    [[ ${dupe:0:1} == "/" ]] && dupe=${dupe:1:${#dupe}-1}
    #remove ending '/' if exist
    [[ ${dupe:${#dupe}-1:1} == "/" ]] && dupe=${dupe:0:${#dupe}-1}
    # extract path from $dupe and mkdir -p it
    dupeFoldername=${dupe##*/} #extract froms tring all is over last '/' (foldername)
    dupePath=${dupe:0:${#dupe}-${#dupeFoldername}} #extract path (remove filename cutting string)
    if [[ ! -d "$path_dest$dupePath" ]] ; then
      mkdir -p "$path_dest$dupePath"
      if [[ $? -ne 0 ]] ; then
        sudo mkdir -p "$path_dest$dupePath"
        [[ $? -ne 0 ]] && { echo -e "$WARN Fail generating directory '$path_dest$dupePath'. Exit."; exit 1; }
      fi
    fi
  done
fi

if [[ $number_rm -gt 0 ]] ; then
  for (( counter=1; counter <= $number_rm; counter++ )) ; do
    dupe=`sed -nr "/^\[$install_macname\]/ { :l /^$prop_cfg_rm$counter[ ]*=/ { s/.*=[ ]*//; p; q;}; n; b l;}" $path_cfg$filename_cfg`
    [[ $dupe == "" ]] && { echo -e "$ERR $filename_cfg: '$prop_cfg_rm$counter' not found inside cfg. Fix cfg!!"; exit 1; }
    [[ ! -d $path_cfg$install_macname$dupe ]] && { echo -e "$ERR File/dir '$path_cfg$install_macname$dupe' defined in config but not found!"; exit 1; }
  done
fi


# ------------------------------------------------------------------------------------------------------------------------
# WORK -------------------------------------------------------------------------------------------------------------------
# ------------------------------------------------------------------------------------------------------------------------

if [[ "$flagForceRealWork" == true ]] ; then
  echo -e "$WARN Warning: using REAL path. This is not a simulation. I can damage system."
  echo "Dest dir used is '$path_dest'."
  echo -n "Continue? (Y/N): "; read ask
  [[ ! $ask =~ ^(yes|y|YES|y|s|S|si|SI|sì)$ ]] && { echo "Exit forced by user."; exit 0; }
fi

#TO-DO local-import come secondo parametro
#legge macchina corrente su file semaforo, legge macchina corrente da parametro (devono corrispondere)
# e va ricopiarsi tutti i files elencati sulla macchina (se presente) nella cartella giusta (è un fresh dei files di install)
if [[ $runLocalImport == true ]] ; then

  #if current install exist but it is not the one current i can't proceede
  numSem=$(ls "$path_prefix_system_semaphore"* 2> /dev/null | wc -l)
  if [[ numSem -gt 0 ]] ; then
    if [[ ! -r "$path_prefix_system_semaphore$install_macname" ]] ; then
      echo -e "$ERR Another install. Can't work"
      exit 1
    fi
  fi

  #

  exit 0
fi

#?????
#echo "1"
#sed -nr "/^\[$install_macname\]/ { :l /^ciccia[ ]*=/ { s/.*=[ ]*//; p; q;}; n; b l;}" $path_cfg$filename_cfg
#sed -nr "/^\[$install_macname\]/ { :l /^AllowOnlyIfPreviousMacIs[ ]*=/ { s/.*=[ ]*//; p; q;}; n; b l;}" $path_cfg$filename_cfg

#
## Verify semaphore file (opzional)
#
AllowOnlyIfPreviousMacIs=`sed -nr "/^\[$install_macname\]/ { :l /^$prop_cfg_read_sem[ ]*=/ { s/.*=[ ]*//; p; q;}; n; b l;}" $path_cfg$filename_cfg`
if [[ $AllowOnlyIfPreviousMacIs != "" ]] ; then
  echo " Found in cfg: AllowOnlyIfPreviousMacIs=$AllowOnlyIfPreviousMacIs"

  if [[ ! -r "$path_prefix_system_semaphore$AllowOnlyIfPreviousMacIs" ]] ; then
    echo -e "$ERR Missing semaphore '$path_prefix_system_semaphore$AllowOnlyIfPreviousMacIs'. Previous install required but not verified. Stop."
    exit 1
  else
    flag_old_mac_to_erase="$AllowOnlyIfPreviousMacIs"
  fi

else
  echo -e "$WARN Warning: control of previous installed machine disabled."
  echo -n "Continue? (Y/N): "; read ask
  [[ ! $ask =~ ^(yes|y|YES|y|s|S|si|SI|sì)$ ]] && { echo "Exit forced by user."; exit 0; }
fi

#
##  Backup old files
#
if [[ $number_files -gt 0 ]] ; then
  for (( counter=1; counter <= $number_files; counter++ )) ; do
    backup=`sed -nr "/^\[$install_macname\]/ { :l /^$prop_cfg_file_copy$counter[ ]*=/ { s/.*=[ ]*//; p; q;}; n; b l;}" $path_cfg$filename_cfg`
    [[ ${backup:0:1} == "/" ]] && backup=${backup:1:${#backup}-1} #remove starting '/' if exist
    if [[ -r $path_dest$backup ]] ; then
      if [[ "$flagForceRealWork" == true ]] ; then
        cp -f "$path_dest$backup" "$path_dest$backup$postfix_bak_file_name"
        if [[ $? -ne 0 ]] ; then
          sudo cp -f "$path_dest$backup" "$path_dest$backup$postfix_bak_file_name"
          if [[ $? -ne 0 ]] ; then
            echo -e "$WARN Fail generating backup file '$path_dest$backup$postfix_bak_file_name'. Ask User."
            echo -n "Continue? (Y/N): "; read ask
            [[ ! $ask =~ ^(yes|y|YES|y|s|S|si|SI|sì)$ ]] && { echo "Exit forced by user with error."; exit 1; }
          else
            echo -e "$OK Generation of backup file [1] '$path_dest$backup' as '$path_dest$backup$postfix_bak_file_name'"
          fi
        else
          echo -e "$OK Generation of backup file [2] '$path_dest$backup' as '$path_dest$backup$postfix_bak_file_name'"
        fi
      else
        echo -e "$OK [Simulated] Generation of backup file '$path_dest$backup' as '$path_dest$backup$postfix_bak_file_name'"
      fi
    else
      echo -e "$WARN File '$path_dest$backup' to backup not present. Ignoring backup."
    fi
  done
fi

if [[ $number_directories -gt 0 ]] ; then
  for (( counter=1; counter <= $number_directories; counter++ )) ; do
    backup=`sed -nr "/^\[$install_macname\]/ { :l /^$prop_cfg_dir_copy$counter[ ]*=/ { s/.*=[ ]*//; p; q;}; n; b l;}" $path_cfg$filename_cfg`
    [[ ${backup:0:1} == "/" ]] && backup=${backup:1:${#backup}-1} #remove starting '/' if exist
    if [[ -d "$path_dest$backup" ]] ; then
      if [[ "$flagForceRealWork" == true ]] ; then
        #if bak directory alrrady exist to not create a new ssh dir inside it....
        if [[ -d "$path_dest$backup$postfix_bak_file_name" ]] ; then
          rm -r -f "$path_dest$backup$postfix_bak_file_name"
          if [[ $? -ne 0 ]] ; then
            sudo rm -r -f "$path_dest$backup$postfix_bak_file_name"
            [[ $? -ne 0 ]] && echo -e "$WARN Fail removing old backup directory.'$path_dest$backup$postfix_bak_file_name'."
          fi
        fi
        #do work
        mv -f "$path_dest$backup" "$path_dest$backup$postfix_bak_file_name"
        if [[ $? -ne 0 ]] ; then
          sudo mv -f "$path_dest$backup" "$path_dest$backup$postfix_bak_file_name"
          if [[ $? -ne 0 ]] ; then
            echo -e "$WARN Fail generating backup directory '$path_dest$backup$postfix_bak_file_name'. Ask User."
            echo -n "Continue? (Y/N): "; read ask
            [[ ! $ask =~ ^(yes|y|YES|y|s|S|si|SI|sì)$ ]] && { echo "Exit forced by user with error."; exit 1; }
          else
            echo -e "$OK Generation [1] of backup directory '$path_dest$backup$postfix_bak_file_name'"
          fi
        else
          echo -e "$OK Generation [2] of backup directory '$path_dest$backup$postfix_bak_file_name'"
        fi
      else
        echo -e "$OK [Simulated] Generation of backup directory '$path_dest$backup$postfix_bak_file_name'"
      fi
    else
      echo -e "$WARN Directory '$path_dest$backup' to backup not present. Ignoring backup."
    fi
  done
fi

if [[ $number_rm -gt 0 ]] ; then
  echo -e "$WARN Attention! Backup of remove ($number_rm) not done."
fi

#
## Copia nuovi files
#
if [[ $number_files -gt 0 ]] ; then
  for (( counter=1; counter <= $number_files; counter++ )) ; do
    dupe=`sed -nr "/^\[$install_macname\]/ { :l /^$prop_cfg_file_copy$counter[ ]*=/ { s/.*=[ ]*//; p; q;}; n; b l;}" $path_cfg$filename_cfg`
    [[ ${dupe:0:1} == "/" ]] && dupe=${dupe:1:${#dupe}-1} #remove starting '/' if exist
    if [[ "$flagForceRealWork" == true ]] ; then
      cp -f "$path_cfg$install_macname/$dupe" "$path_dest$dupe"
      if [[ $? -ne 0 ]] ; then
        sudo cp -f "$path_cfg$install_macname/$dupe" "$path_dest$dupe"
        if [[ $? -ne 0 ]] ; then
          echo -e "$ERR Fail copyng file over destination from <$install_macname> to '$path_dest$dupe'. Ask User."
          echo -n "Continue? (Y/N): "; read ask
          [[ ! $ask =~ ^(yes|y|YES|y|s|S|si|SI|sì)$ ]] && { echo "Exit forced by user with error."; exit 1; }
        fi
      fi
      echo -e "$OK Copied file from <$install_macname> '$path_dest$dupe'."
    else
      echo -e "$OK [Simulated] Copied file from '$path_cfg$install_macname/$dupe' to '$path_dest$dupe'."
    fi
  done
fi

if [[ $number_directories -gt 0 ]] ; then
  for (( counter=1; counter <= $number_directories; counter++ )) ; do
    dupe=`sed -nr "/^\[$install_macname\]/ { :l /^$prop_cfg_dir_copy$counter[ ]*=/ { s/.*=[ ]*//; p; q;}; n; b l;}" $path_cfg$filename_cfg`
    [[ ${dupe:0:1} == "/" ]] && dupe=${dupe:1:${#dupe}-1} #remove starting '/' if exist
    [[ ${dupe:${#dupe}-1:1} == "/" ]] && dupe=${dupe:0:${#dupe}-1} #remove ending '/' if exist
    if [[ "$flagForceRealWork" == true ]] ; then
      cp -f -r "$path_cfg$install_macname/$dupe" "$path_dest$dupe"
      if [[ $? -ne 0 ]] ; then
        sudo cp -f -r "$path_cfg$install_macname/$dupe" "$path_dest$dupe"
        if [[ $? -ne 0 ]] ; then
          echo -e "$ERR Fail copyng directory over destination from <$install_macname> to '$path_dest$dupe'. Ask User."
          echo -n "Continue? (Y/N): "; read ask
          [[ ! $ask =~ ^(yes|y|YES|y|s|S|si|SI|sì)$ ]] && { echo "Exit forced by user with error."; exit 1; }
        fi
      fi
      echo -e "$OK Copied directory <$install_macname> '$path_dest$dupe'."
    else
      echo -e "$OK [Simulated] Copied directory from '$path_cfg$install_macname/$dupe' to '$path_dest$dupe'."
    fi
  done
fi

if [[ $number_rm -gt 0 ]] ; then
  for (( counter=1; counter <= $number_rm; counter++ )) ; do
    dupe=`sed -nr "/^\[$install_macname\]/ { :l /^$prop_cfg_rm$counter[ ]*=/ { s/.*=[ ]*//; p; q;}; n; b l;}" $path_cfg$filename_cfg`
    [[ ${dupe:0:1} == "/" ]] && dupe=${dupe:1:${#dupe}-1} #remove starting '/' if exist
    if [[ "$flagForceRealWork" == true ]] ; then
      rm -f "$path_dest$dupe"
      if [[ $? -ne 0 ]] ; then
        sudo rm -f "$path_dest$dupe"
        if [[ $? -ne 0 ]] ; then
          echo -e "$ERR Fail removing file '$path_dest$dupe'. Ask User."
          echo -n "Continue? (Y/N): "; read ask
          [[ ! $ask =~ ^(yes|y|YES|y|s|S|si|SI|sì)$ ]] && { echo "Exit forced by user with error."; exit 1; }
        fi
      fi
      echo -e "$OK Removed file <$install_macname> '$path_dest$dupe'."
    else
      echo -e "$OK [Simulated] Removed file '$path_dest$dupe'."
    fi
  done
fi


#
## Write new semaphore (can be disabled)
#
if [[ $ok_write_semaphore == "yes" ]] ; then
  if [[ -r $path_prefix_system_semaphore$flag_old_mac_to_erase ]] ; then
    #if [[ "$flagForceRealWork" == true ]] ; then
    rm "$path_prefix_system_semaphore$flag_old_mac_to_erase"
    if [[ $? -ne 0 ]] ; then
      sudo rm "$path_prefix_system_semaphore$flag_old_mac_to_erase"
      [[ $? -ne 0 ]] && echo -e "$WARN All was OK but I can't remove '$path_prefix_system_semaphore$flag_old_mac_to_erase' !!"
    fi
    touch "$path_prefix_system_semaphore$install_macname"
    if [[ $? -ne 0 ]] ; then
      sudo touch "$path_prefix_system_semaphore$install_macname"
      [[ $? -ne 0 ]] && echo -e "$WARN All OK EXCEPT creation of blank file '$path_prefix_system_semaphore$install_macname' !!"
    fi
  fi
fi

exit 0;