how to give a variable to a command in shell script...

Shell Programming and Scripting
1

hi all...
I am executing a comman in a shell script but the command needs a user input of character 'y' as input so it stops in between...may i know is there is any way of giving that character as input in the shell script itself???...thanks in advance....

2

Using expect is one way to deal with the interactive apps.

But i think you can also try here document style like

command <<EOF
yes
true
and_so_on
EOF

This will invoke the command and supplies the responses between <<EOF and EOF

3

i tried the <<EOF true EOF thing now it's not working mate.....actaully my input to the command is "y"...so i gave like my command<<EOF y EOF....this is what u said rite????

4

If u like to give y as user input

read x
if [ x == "y"] ; then

#write your code

else

echo "Input is wrong"

fi

you like to add the value y in the script itself

x="y"

if [ x == "y" ] ; then

#write your code

fi

5

no, that not what's been said.

command <<EOF
y
EOF
6

yeah i tried the same but it's not working:-(

7

What is your shell ? sh, bash, ksh, csh ....
Try this example:

script file yn.sh

echo "Confirm system destruction ?"
read confirm

if [ "$confirm" = y ]
then
   echo "System destruction confirmed."
   echo "Booom !!! "
else
   echo "Tomorrow perhaps."
fi

Excute script:

$ sh yn.sh <<EOF
y
EOF
Confirm system destruction ?
System destruction confirmed.
Booom !!!

Jean-Pierre.