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Shell Programming and Scripting

Script Gone Wrong

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# 8  
Old 05-15-2010
Though we don't seem to have the discrepancy on our systems we don't have any scripts which rely on the "uptime" command.
# 9  
Old 05-15-2010
There is a discrepancy but both values are correct.
# 10  
Old 05-15-2010
As the accountant said to the auditor.
# 11  
Old 05-15-2010
If you are logged twice to a system, are you a single user or two ?
# 12  
Old 05-15-2010
Must depend on context.
Some software is licenced by seat and some by connection.
Some software allows multiple users under the same login, some doesn't.
We'd look at the most relevant count.

Where the system is hosting a database the count of active database connections is much more useful than unix login sessions (which might be nil).
Within that there may be rules about multiple connections.


Wonder if the O/P wants number of current sessions or number of different users who have current sessions?
# 13  
Old 05-16-2010
@ygemici, methyl, jlliagre - Thanks alot for the help, i corrected the code, and now its working fine, i should have posted it before handing it in.

i have a question though,
- as for the (date +%H) what does it do?!

as for "users=$(who -u|wc -l)" instead of using "uptime" that was pretty slick, i liked it.

@vidyadhar85's - sorry i forgot to post the errors, here they are, but i guess its a little bit, the guys figured out the erros

Image

Thanks again
let's hope the teacher accepts a modified late assignment :P
# 14  
Old 05-16-2010
Why you din't make change
Code:
time=$(date | cut -d" " -f5 | cut -d: -f1)
#=>
time=$(date '+%H')   # run command date '+%H' to test and read man date

If need arguments, so use "$time", better than $time.
After those you don't get those errors.

Here is maybe more easier to read version, menu has only once, used more pipes, not temp files.

Code:
while
      echo "1. Greet User"
      echo "2. Replace Papper"
      #...
      echo -n "Choice:"
      read choice
do
      if [ "$choice" = 5 ] ; then
         break
      fi

      ###################################
      if [ "$choice" = 1 ] ; then
         #do_some
         continue
      fi

      ###################################
      if [ "$choice" = 2 ] ; then
         #do_some2
         continue
      fi

      ###################################
      if [ "$choice" = 3 ] ; then
         users=$(who | wc -l)
         #...
         continue
      fi

      ###################################
      if [ "$choice" = 4 ] ; then
         who | while read line
         do
            values=($line)
            usertemp=${values[0]}
            #....
         done
         #....

         continue
      fi


      #...
      echo "no such option"
done

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