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need to pass value while running the script

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Top Forums Shell Programming and Scripting need to pass value while running the script
# 8  
Old 07-19-2012
Quote:
Originally Posted by balajesuri
Code:
#!/bin/ksh

echo "The value of the first argument to the script: $1"
password="asr"

if  [ $1 == "$password" ]
then
    echo "You have access!"
else
    echo "ACCESS DENIED!"
fi

read is used to take input from user. That's why you saw what you quoted.
You did not do this changes as suggested.
Take away the read, the value is already in $1
And I think you should have quotes surrounding $1 "[": if [ "$1" = "$password" ]
I don't know about ksh, but in sh you should use single "=".
# 9  
Old 07-20-2012
Java
here come another question.


I was reading about if else in a book.
Below script was given a example.

One weird thing which I noticed was , this will only read that file which is created through this script.
Even if you try to make this script read another file(dat file)if will only show the output of the file
Which is created by this.

I created a file khare using this script and pass age 27 in the file.


Code:
#!/bin/sh
   
  # Prompt for a user name...
  echo "Please enter your name:"
  read USERNAME
   
  # Check for the file.
  if [ -s ${USERNAME}_DAT ]; then
          # Read the age from the file.
          AGE=`cat ${USERNAME}_DAT`
          echo "You are $AGE years old!"
  else
          # Ask the user for his/her age 
          echo "How old are you?"
          read AGE
   
                 if [ "$AGE" -le 2 ]; then
                                 echo "You are too young!"
                 else
                                 if [ "$AGE" -ge 100 ]; then
                                                echo "You are too old!"
                                 else
                                 # Write the age to a new file.
                                 echo $AGE > ${USERNAME}_DAT
                 fi
          fi
  fi

now when I run the script , passing the file khare(created through this script ) it show output as below.
Code:
$
  Please enter your name:
  khare
  You are 27 years old!
  You are 27 years old!
  $

Now I created a file by vi command , file name as D_DAT and content inside this is FW
Now when I ran the script
It ask for file mane which I gave as a D_DAT . now what I see now is instead of displaying “FW” it is again asking the age .
Now I pass 45 for the age.
After this I noticed that script has created the a new file as D_DAT_DAT.


I am fail to understand why this script is not reading the file which is already present in the system.
Last edited by scriptor; 07-20-2012 at 08:30 AM.. Reason: miss some info
# 10  
Old 07-20-2012
this is working as expected... check again....

Code:
]$ sh test_tmp.sh
Please enter your name:
pd
How old are you?
25
]$ sh test_tmp.sh
Please enter your name:
pd
You are 25 years old!

# 11  
Old 07-20-2012
Java
can you please create the the file manually and the run the script.
and see if you are still getting the same result ?
# 12  
Old 07-20-2012
Code:
]$ echo "36" > pd_DAT
]$ sh test_tmp.sh
Please enter your name:
pd
You are 36 years old!
]$ echo "39" > pp_DAT
]$ sh test_tmp.sh
Please enter your name:
pp
You are 39 years old!

And i have tried with a file which i have created in my windows machine and then copied to server.. still the result is same..
Code:
]$ sh test_tmp.sh
Please enter your name:
kk
You are 99 years old!

# 13  
Old 07-20-2012
Java
not working in my case
i created the D_DAT file manually but when i tried call it through it simply creating another file and asking of the age again.
see o/p as below
Code:
3 Jul 20 16:42 D_DAT
3 Jul 20 16:43 D_DAT_DAT

# 14  
Old 07-20-2012
Quote:
Originally Posted by scriptor
/.../
...now when I run the script , passing the file khare(created through this script ) it show output as below.
Code:
$
  Please enter your name:
  khare
  You are 27 years old!
  You are 27 years old!
  $

The error here is that you probably were using your script with that file as input your_script < khare_DAT or?
If you do that it will use the lines from the file instead of asking for input. Or I'm not shure exactly what you tested, but perhaps you mix up the input and the name of the file, if you want the file "khare_DAT" to be used you should only enter "khare", and not use the file as input to the script.
Quote:
Now I created a file by vi command , file name as D_DAT and content inside this is FW
Now when I ran the script
It ask for file mane which I gave as a D_DAT . now what I see now is instead of displaying “FW” it is again asking the age .
Now I pass 45 for the age.
After this I noticed that script has created the a new file as D_DAT_DAT.
Here you should have used only "D" as input, if you use "D_DAT" it will create a file named "D_DAT_DAT" because of
Code:
echo $AGE > ${USERNAME}_DAT

Last edited by 244an; 07-20-2012 at 11:17 AM..
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