passing a command line argument

Shell Programming and Scripting
1

I have a shell script which does the encryption of a file where i am passing the file name as a command line argument,but later on the script waits on the screen to enter Y or N
what is the command i should be using on the shell script

#!/bin/bash -x

outfilename=file.out

echo "**********************************" >> $outfilename 2>&1

cd encrypt_files/
"encrypt the file command" $1

read_line $2 ( does this work)
HERE IT WAITS FOR ME TO ENTER Y/N how do i pass it here

echo "*********************************" >> $outfilename 2>&1

2

Depending on what your logic is for Y or N:

You can read in a file with Y or N

read input < ./my_Y_file

I'm sure some of the gurus here should have a better solution than reading the variable from a file. But it works.

3

Rudoraj,
Here is one way of doing:

...
echo "Enter value:"
read mInputValue
echo "You entered: "$mInputValue
...
4

I think I am confusing everybody...

I want to automate the process ..so
When I run the shell script, I know it will wait for the user input.
since this might run at night, there might be noone to input, so i want to pass it along with command line itself, so when it asks for user input, it takes the parameter passed on the command line.....

how is it possible.

Thanks

5 
...
if [ "$1" = "" ]; then        ## No parameters were entered
  echo "Enter value:"
  read mInputValue
  echo "You entered: "$mInputValue
else
  mInputValue=$1
  echo "The input parameter was "$mInputValue
fi
...

To run the shell with parameter:

my_shell my_parameter

To run the shell to prompt:

my_shell
6

Try:

echo Y | script

7

>>...
>>if [ "$1" = "" ]; then ## No parameters were entered
>> echo "Enter value:"
>> read mInputValue
>> echo "You entered: "$mInputValue
>>else
>> mInputValue=$1
>> echo "The input parameter was "$mInputValue
>>fi
>>...

here once I enter the $1 parameter,
the command that i run in the script is asking me for confirmation (user input) ( y or n)
in order to run successfully, i have to enter y at the prompt( manually).
so to avoid the manual entry ...

how do i avoid the prompt and give "y" in the script itself

8

Rudoraj,
As Solfreak posted, to avoid the prompt:

echo "Y" | your_shell
9

Pipe the input to the script:

printf "%s\n" "$PARAMETER" | /path/to/script