Pass YES and NO sequentially to a bash script

Shortly, using yes

yes is a tool for repeating some string infinitely.

You can pass 1 yes, then 1 no, then again 1 yes and 1 no and so on by using:

yes $'yes\nno' | ./script.sh 

Using bash, you could reverse the pipe by using process-substitution syntax:

./script < <(yes $'yes\nno') 

Sample:

head -n 6 < <(yes $'yes\nno') 

yes no yes no yes no 

... or two yes and one no:

head -n 6 < <(yes $'yes\nyes\nno') 

yes yes no yes yes no 

Or any other combination...

Further

As your question stand for:

If the bash script has multiple input (more than one) how can I pass it ?

Little sample (using a function instead of a script, for demo):

myScript() { while read -rp 'Name: ' name && [[ -n $name ]]; do read -rp 'Last name: ' lName || break read -rp 'Birth date (YYYY-MM-DD): ' birth || break bepoch=$(date -d "$birth" +%s) printf 'Hello %s %s, you are %d years old.\n' \ "$name" "$lName" $(((EPOCHSECONDS-bepoch)/31557600)) done } 

Sample run:

myScript 

Name: John Last name: Doe Birth date (YYYY-MM-DD): 1941-05-03 Hello John Doe, you are 83 years old. 

Using inline string

myScript <<<$'John\nDoe\n1941-05-03' 

Hello John Doe, you are 83 years old. 

Using inline text

myScript <<eoInput John Doe 1941-05-03 James Bond 1953-04-13 eoInput 

Hello John Doe, you are 83 years old. Hello James Bond, you are 72 years old. 

yes sends y (or whatever else you tell it to send) to its standard output. If you want yes and no on the standard output, you can use echo:

{ echo yes echo no } | ./script 

I used a block to pipe both inputs to the script. There are more possible ways, e.g.

printf '%s\n' yes no | ./script.sh 

We can also use below command also

echo -e "yes\nno" | ./script.sh 

You can just send the lines you want -

printf "yes\nno\n" | ./script.sh 

or if you need a certain number of each -

{ yes yes |head -50; yes no | head -50; } | ./script.sh 

Or if you need them toggled -

yes | awk '{ if (NR%2) {print "yes"} else {print "no"} }' | ./script.sh 

(only using yes here as a driver for records to read, lol)