shell scripting question

[keyvanrahmadi]

I have a course work questio which i like some input on, i have achieved the desired out put but the main problem is the script should be 15 lines and mine is 20 :(

That said i know it can be done in far less using sed and awk, but cant use them at all for this question. can you guys please read through my script and give me suggestions please. i have tried two scripts:

FIRST SCRIPT

#!/bin/bas
int=1
user=$(ls -l $1 | cut -d " " -f3)
echo "      READ WRITE EXECUTE"
while [ $int -le 9 ]
do
int=$[$int+1]
case "$int" in
2)echo -n "owner $user " ;;
5)echo
  echo -n "group      " ;;
8)echo
  echo -n "everybody  " ;;
esac
perm=$(ls -l $1 | cut -c$int)
case "$perm" in
-)echo  -n "no " ;;
*)echo -n "yes " ;;
esac
done

the out put is as follow:

READ WRITE EXECUTE
owner keyvan.ahmadi yes yes no
group yes no no
everybody yes no no

the only problem with above script as i already mentioned is, its 20 lines and it needs to be 15 lines.

SCRIPT 2

#!/bin/bash
int=1
for perm in `ls -l $1|cut -c2, 3,4,5,6,7,8,9,10 --output-delimiter " "`
do
 case "$int" in
  1)echo -n -e "READ WRITE EXECUTE\nowner `ls -l $1 | cut -d " " -f5` " ;;
  4)echo -n -e "\ngroup `ls -l $1 | cut -d " " -f4` " ;;
  7)echo -n -e "\neverybody  " ;;
 esac
 case "$perm" in
  -)echo  -n   "no  " ;;
  *)echo -n  "yes " ;;
 esac
done
echo

Now the second script has two problems

1- well it dosent work :) and when run it gives the following output:

READ WRITE EXECUTE
owner 52 yes

2- its 16 lines even if it worked which it dosent :(

As i have said before i have managed to do it using sed & awk:

#!/bin/bash

if [ -f $1 ]
then
ls -l $1 | sed -e '1,9s/x/YES /g;1,9s/w/YES /g;1,9s/-/NO /g;1,9s/r/YES /g' | awk -F' ' '{print "\t\t\tREAD\tWRITE\tEXECUTE\nOWNER "$12"\t"$2"\t"$3"\t"$4"\nGROUP "$13"\t\t"$5"\t"$6"\t"$7"\nEVERYBODY\t\t"$8"\t"$9"\t"$10}' > Report
else
:
 echo "Cannot find file."
fi

But i cant use it, beacuse my lecturer throw a temper tantrum at me and look at me as i have just killed his fav pet or something.

So any help guys & gals will be greatly appriciated.

keyvan

[coaxfiber]

Is your shell bash?

[keyvanrahmadi]

Is your shell bash?

its #!/bin/bash so the answer to your question is yes mate.

keyvan

[keyvanrahmadi]

SCRIPT 2 correct code is as follow:

#!/bin/bash
int=1
for perm in `ls -l $1|cut -c2-10 --output-delimiter " "`
do
 case "$int" in
  1)echo -n -e "READ WRITE EXECUTE\nowner `ls -l $1 | cut -d " " -f3` " ;;
  4)echo -n -e "\ngroup `ls -l $1 | cut -d " " -f4` " ;;
  7)echo -n -e "\neverybody  " ;;
esac
 case "$perm" in
  -)echo  -n   "no  " ;;
  *)echo -n  "yes " ;;
 esac
done
echo

i had -f5 rather than -f3 in first line of echo. but th eproblem is still the same.

keyvan

[ghostdog74]

15 lines? if you bring all your lines into one line using ";" it would be even better, but you aren't going to do that right.?
What's wrong with more than 15 lines, if its more readable to everyone ? anyway here's a crude implementation in awk:

ls -l "file" |  awk 'BEGIN { 
                  owner["r"] = "read";owner["w"] = "write";owner["x"]= "execute";owner["-"]="No"
                  group["r"] = "read";group["w"] = "write";group["x"]="execute";group["-"]="No"
                  every["r"] = "read";every["w"] = "write";every["x"]="execute";every["-"]="No"
                  printf "%-8s%-15s%-15s%-15s\n", "Field","READ" ,"WRITE","EXECUTE"                  
                  }                
                { perm = $1; own=$3 }
                END { FS=""; n = split(perm,permarray)
                    printf "%-8s",own
                    for (i=2;i<=4;i++) printf "%-15s"  , owner[permarray[i]];
                    printf "\n%-8s" , "group" 
                    for (i=5;i<=7;i++) printf "%-15s", group[permarray[i]];
                    printf "\n%-8s" , "All" 
                    for (i=8;i<=10;i++) printf "%-15s", every[permarray[i]]; print ""
                }'

output:

# ./test.sh
Field   READ           WRITE          EXECUTE
root    read           write          No
group   read           No             No
All     read           No             No