could any one of u help me in solving this problem *********please the deadline is tomorrow******* Write a shell script (give it the name: skinny) which receives any number of arguments. Those arguments are in fact themselves Unix commands (e.g. cat, cp, mv, clear, ls,...). Once invoked, it shall display a prompt like this: Skinny Shell> And shall only allow the user to execute the Unix commands received as arguments. If a command which is not among those arguments is entered, it should be ignored and an error message shall be printed on the screen. If the command is among the list of arguments, then it shall be executed. In all cases the above prompt shall be always echoed. To exit, we shall just type: quit thanx

I shouldn't do this, but here's the hard part - the loop. I'll leave it to you to make the comparison: #!/bin/ksh echo "your prompt" read command cnt=0 for i in $* do if [[ $i = $command ]] then cnt=1 break fi done echo $cnt

thanks for ur help please solve cause i still have two problems and i am working with them now and its 9:30 pm and there is no time pleeeeeeeeeeeeeeeeeeeeeese

i didnt understand (cnt) what do u mean ??

i couldnt do more than this please help me echo -n " Skinny Shell>" a= `line` for i in $* do if [ $i = a ] then ./exec.txt a break elif [ a = " quit " ] then kill (i dont know what i have to put here) else echo "not available" f i done

Your requirements are not very clear. #!/bin/ksh while true do printf "Skinny Shell > " read command if [ "$command" = "quit" ] then break fi cnt=0 for i in $* do if [[ $i = $command ]] then cnt=1 break fi done if [ $cnt -eq 1 ] then # execute the command if valid unix printf "Executing valid command\n" eval $* else printf "Invalid command\n" fi don

Here is a sample output from my skinny shell script: mona@amazon:~/spring2006/os470> skinny date pwd ls cal Skinny Shell> ls a1q1 execCommand getFirst lab1 lab2 skinny Skinny Shell> cal 3 2006 March 2006 S M Tu W Th F S 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Skinny Shell> date Wed Mar 8 16:33:31 GST 2006 Skinny Shell> pwd /staff/mona/spring2006/os470 Skinny Shell> cat skinny Command not available! Skinny Shell> clear Command not available! Skinny Shell> bye Command not available! Skinny Shell> quit mona@amazon:~/spring2006/os470> In the above execution, I only restricted the shell to the commands: date, pwd, ls and cal. Any other Unix –or non Unix- command will not be accepted