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#!/bin/bash
#Author : Amirreza Firoozi
#License : GPL3
#version : 1.8
#This is a simple script that find distro name and echo (return) it.
#Its useful if you want to know what distro is your own script running on.
previous_way(){
#This is the way we used in previous_way version(s)
distros=( "Arch" "Ubuntu" "Debian" "Suse" )
dId=0
while [ "1" == "1" ];do
grep -i "${distros[dId]}" /etc/issue 1>/dev/null 2>&1
exstatus=$?
if [ "$exstatus" == "0" ];then #if grep found dist_name successfuly , we save dist_name in distro
distro=${distros[dId]}
break
fi
if [ "$dId" -gt "${#distros[@]}" ];then #if the number of loop is greater than number of distros we will break the loop
break
fi
((dId++))
done
}
#This is the current_way .
#As you can see its more powerful and reliable and need less time :D
current_way(){
distro=$(egrep "^NAME" /etc/os-release | sed s/"NAME="// | sed s/\"//g)
}
#In previous version we used if to make argument support
#in this version we use the correct way of it (getopts)
current_way
if [ "$#" == "0" ];then
echo "$distro"
exit 0
fi
while getopts ":o:p" OPTIONS; do
case $OPTIONS in
o) #redirects output to a file
while [ "$#" -gt "1" ];do
FILE=$2
echo "$distro" > $FILE
shift #Move on to next input file
done
;;
p) #use previous_way
previous_way
if [ "$#" == "1" ];then
echo "$distro"
exit 0
fi
;;
*) #unrecognized option
echo -e " Invalid Option \n see man dist_detect if you need help "
exit 1
;;
esac
done
shift $((OPTIND-1)) #This tells getopts to move on to the next argument
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