#!/bin/sh
######################################################################
# Gary Keen                                             version 0.0.5
#
# 01/02/21 | 1/22/21 | 1/25/21 | 2/4/2021 | 10/12/21 | 3/27/24
#
# Description:
#       A script to put in place all the files,permissions,directories
#       needed to convert systemd startup to systemV startup.
#
# /root/StartupScripts -- All startup script that do not start with READ
#                       will get executed
# /usr/lib/systemd/system/mystartup.service -- Unit file
# /etc/rc.d/init.d/StartUp --- Must be executable
#
#
# Notes/Updates:
#       -- Changed the way the init script is built. Tail the bottom of this script.
#          I know not very elegant but the $variables and exe code wouldn't show up.
#       -- Ubuntuized for future use and the nart.   1/25/2021
#       -- I have tested this on Ubuntu and it works.  10/12/21
#       -- I also removed a line from the from the bottom of this script removing a linex`
#          line at the top, so tail 18 not 19 -- 10/21/12
#       -- I added a function to create the variables so they wouldn't spew out before
#          I check if the script had already been run,   10/12/21
#
######################################################################
#
#=========================  What OS am I  ===========================#
cat /etc/*release* |grep ID_LIKE | awk -F"=" '{print $2}' | grep rhel >/dev/null 2<&1
EXIT1=$?
cat /etc/*release* |grep ID_LIKE | awk -F"=" '{print $2}' | grep debian >/dev/null 2<&1
EXIT2=$?

#========================= Create variables =========================#
#
setvars () {

ROOTDIR=/root/StartupScripts
REDME=$ROOTDIR/README.txt
if [ $EXIT1 = 0 ]
then
INITSCRPT=/etc/rc.d/init.d/StartUp
UNITFILE=/usr/lib/systemd/system/mystartup.service
fi
#
if [ $EXIT1 = 0 ]
then
echo "[Unit]
Description=My startup scripts
After=network.target

[Service]
ExecStart=/etc/rc.d/init.d/StartUp &

[Install]
WantedBy=multi-user.target
WantedBy=graphical.target" > $UNITFILE
fi
#
if [ $EXIT2 = 0 ]
then
INITSCRPT=/etc/init.d/StartUp
UNITFILE=/lib/systemd/system/mystartup.service
fi
#
if [ $EXIT2 = 0 ]
then
echo "[Unit]
Description=My startup scripts
After=network.target

[Service]
ExecStart=/etc/init.d/StartUp &

[Install]
WantedBy=multi-user.target
WantedBy=graphical.target" > $UNITFILE
fi
#
if [ $EXIT1 = 1 -a $EXIT2 = 1 ]
then
echo
echo " Unknown OS --- exiting..... "
exit 0
fi


echo
echo "This is the init script and the unit file that will be used, respectfully."
echo
echo "init script"
echo $INITSCRPT
echo "unit file"
echo $UNITFILE
echo
echo "Displaying the unit file to be used."
echo
cat $UNITFILE
echo
echo "Press enter."
read ANSW0
}
#
#======================== Build functions ============================#
#
contin () {
echo "Press enter to continue."
read ANSW0
}
#
enablescript () {
systemctl enable mystartup.service
systemctl status mystartup.service
}
#
readme () {
echo "

Directory and file location:
startup script directory = $ROOTDIR
        Drop script here to have them executes at startup.
unit file = $UNITFILE
initscript = $INITSCRPT" >$REDME

}
#
ibeenrun () {
ls /root |grep StartupScripts >/dev/null 2<&1
EXITBEENRUN=$?

if [ $EXITBEENRUN = 1 ]
then
contin
else
echo "===================================================="
echo "Checking to see if this script has been run already." 
echo "===================================================="
echo
echo "The directory /root/StartupScripts EXISTS."
echo "This would mean this script has ALREADY BEEN run."
echo "Are you sure you want to run this script again ?"
contin
echo "Are you sure ?????????????????"
contin
fi
}
#
open () {
echo
echo "This script creates a directory in /root call StartupScripts"
echo "Anything dropped in that directory that DOSE NOT begin with"
echo "the word READ. Will be executed during startup."  
echo
echo "This script creates a systemd unit file and a script to be"
echo "executed from that unit file."
echo
ibeenrun
}
#
crtfiledirs () {
mkdir $ROOTDIR
sleep 1
touch $INITSCRPT
chmod 755 $INITSCRPT
touch $UNITFILE
}
#
initscript () {


## cat $0 | tail -19 >$INITSCRPT
cat $0 | tail -18 >$INITSCRPT

}
#
# rhelunitfile () {
# echo "[Unit]
# Description=My startup scripts  
# After=network.target

# [Service]
# ExecStart=/etc/rc.d/init.d/StartUp & 

# [Install]
# WantedBy=multi-user.target 
# WantedBy=graphical.target" > $UNITFILE
# }
#
# ubununitfile () {
# echo "[Unit]
# Description=My startup scripts  
# After=network.target

# [Service]
# ExecStart=/etc/init.d/StartUp & 

# [Install]
# WantedBy=multi-user.target 
# WantedBy=graphical.target" > $UNITFILE
# }
#
crtlinks () {
# ln -s /etc/rc.d/init.d/StartUp $ROOTDIR/README_startup_init_script 
ln -s $INITSCRPT $ROOTDIR/README_startup_init_script 
ln -s $UNITFILE $ROOTDIR/README_mystartup_unit_file
# ln -s /usr/lib/systemd/system/mystartup.service $ROOTDIR/README_mystartup_unit_file
echo
echo "Drop executable script in the /root/StartupScripts to have them executed at startup."
echo
#
#
#============================ Execute functions =============================#
#
echo
echo "I'm not sure this script is ready for prime time yet."
echo "Use at your own risk until I can confirm it works as it should."
echo
contin
}

open
setvars
crtfiledirs
initscript
sleep 1
enablescript
crtlinks
readme



#------EOF--------DO NOT CHANGE ANYTHING BELOW THIS LINE-------EOF----------#
#!/bin/sh
######################################################################
# Gary Keen
#
#
# One startup to rule them all
#
#
#
#
######################################################################
SCRIPTDIR=/root/StartupScripts

for A in `ls $SCRIPTDIR | grep -v READM`
do
echo $A
$SCRIPTDIR/$A
done