How to use many variables in the loop shell

for ((i=1;; i++)); do read "d$i" || break; done < /home/marcin/workspace/bake/source/ns-3.19/RESULTS/macaddr.txt echo "$d1" echo "$d2" echo "$d5" for ((j=1;j<=5; j++)); do echo "$d$j" || break; done 

This is my code, but the problem is that I cannot display all the MAC adresses that I have in my maaddr.txt file. If I use just echo "$d1" or echo "$d2" it works fine. I would like to put it into a loop but echo "$d$j" doesn’t seem to work.

ok that works fine, but when i put it into the whole code i cannot generate files that i need. After using the loop(with mac_adresses) the whole code works only for the last mac_address that is stored in macaddr.txt.

> #!/bin/sh > > #SETTING parameters to generate feature vectors > > #set the directory of the initial .pcap files" files=/home/marcin/workspace/bake/source/ns-3.19/RESULTS/TRAFFIC_LIGHTS/* > udp_fil_dir=/home/marcin/workspace/bake/source/ns-3.19/RESULTS/TRAFFIC_LIGHTS/_udp_filtered/* > mac_sorted_dir=/home/marcin/workspace/bake/source/ns-3.19/RESULTS/TRAFFIC_LIGHTS/_udp_filtered/_MAC_sorted/* > > #set <src> for source mac address (outcoming packets) or <dst> for destination source mac address (incoming packets) ether_direction=src > > #FILTERING only UDP packets from pcap file stored in a specific folder > > printf "...FILTERING only UDP packets from pcap files stored in a > specific folder...\n" > > for f in $files do tshark -Y "udp&&!aodv" -r "$f" -w > ""$f"_udp_filtered".pcap > #mergecap -w all_pcaps *.pcap mkdir /home/marcin/workspace/bake/source/ns-3.19/RESULTS/TRAFFIC_LIGHTS/_udp_filtered > mv ""$f"_udp_filtered".pcap > /home/marcin/workspace/bake/source/ns-3.19/RESULTS/TRAFFIC_LIGHTS/_udp_filtered > done > > for g in $udp_fil_dir do > #FILTERING packets with a source/destination mac address set in the parameters and writing the results into the new .pcap file printf > "...FILTERING packets with a source mac adress: "$mac_addr"...\n" > > #max=5 > #for ((i=1;i<=$max; i++)); > #do > > #storing all the macaddresses from the macaddr.txt file > > IFS=$'\n' read -d '' -r -a mac_addresses < > '/home/marcin/workspace/bake/source/ns-3.19/RESULTS/macaddr.txt' for > mac_address in "${mac_addresses[@]}" do > > tcpdump ether "$ether_direction" "${mac_address}" -tt -r "$g" -w > ""$g"_MAC_sort".pcap > #echo "$ether_direction" "$d$i" done > #done > #CONVERTING .pcap file into the .txt file printf "...CONVERTING .pcap file into the .txt file...\n" > > #tshark -r ""$g"_MAC_sort".pcap > ""$g"_MAC_sort".txt tcpdump -e -r ""$g"_MAC_sort".pcap > ""$g"_MAC_sort".txt > #moving all the files to another directory > > mkdir > /home/marcin/workspace/bake/source/ns-3.19/RESULTS/TRAFFIC_LIGHTS/_udp_filtered/_MAC_sorted > mv ""$g"_MAC_sort".txt > /home/marcin/workspace/bake/source/ns-3.19/RESULTS/TRAFFIC_LIGHTS/_udp_filtered/_MAC_sorted > done > > for h in $mac_sorted_dir do > #ADDING a string //filename// at the beginning of each line printf "...ADDING a string //filename// at the beginning of each line...\n" > > export fspec=./"$h" fname=`basename $fspec` echo $fname > > #awk 'BEGIN{print "'$fname'"}' awk '{print "'$fname'" $0;}' "$h" > ""$h"_index".txt mkdir > /home/marcin/workspace/bake/source/ns-3.19/RESULTS/TRAFFIC_LIGHTS/_udp_filtered/_MAC_sorted/indexed > mv ""$h"_index".txt > /home/marcin/workspace/bake/source/ns-3.19/RESULTS/TRAFFIC_LIGHTS/_udp_filtered/_MAC_sorted/indexed > done > > cd > /home/marcin/workspace/bake/source/ns-3.19/RESULTS/TRAFFIC_LIGHTS/_udp_filtered/_MAC_sorted/indexed > cat * >> "$ether_direction"_"${mac_address}"_final.txt > > #COUNTING the lines printf "...COUNTING the lines...\n" > > # function storing list of all files in variable files get_files () { files="`ls "$ether_direction"_"${mac_address}"_final.txt`" > #################INPUT TEXT FILE //"$ether_direction"_"$mac_addr"_final.txt } > > # function counting the number of lines in a file count_lines () { f=$1 # 1st argument is filename l=`wc -l $f | sed > 's/^\([0-9]*\).*$/\1/'` # number of lines } > > # the script should be called without arguments if [ $# -ge 1 ] then echo "Usage: $0 " exit 1 fi > > # split by newline IFS=$'\012' > > echo "$0 counts the lines of code" l=0 n=0 s=0 > # call a function to get a list of files get_files > # iterate over this list for f in $files do > # call a function to count the lines > count_lines $f > #echo "$f: $l"loc # store filename in an array file[$n]=$f # store number of lines in an array lines[$n]=$l # increase counter > n=$[ $n + 1 ] # increase sum of all lines > s=$[ $s + $l ] done > > #echo "$n files in total, with $s lines in total" > > #GIVING a final result: > > printf "***************************************************\n" printf > "NUMBER OF LINES:"$s"\n" printf > "***************************************************\n"