Passing arguments to an interactive program non-interactively

Question

I have a bash script that employs the read command to read arguments to commands interactively  for example yes no options  Is there a way to call this script in a non-interactive script passing default option values as arguments   It s not just one option that I have to pass to the interactive script

User · Answer

You can also use printf to pipe the input to your script   var val printf  yes nno nmaybe n var n      your script sh

User · Answer

You can put the data in a file and re-direct it like this     cat file sh    bin bash  read x read y echo  x echo  y   Data for the script     cat data txt 2 3   Executing the script     file sh  lt  data txt 2 3

User · Answer

For more complex tasks there is expect   http   en wikipedia org wiki Expect    It basically simulates a user  you can code a script how to react to specific program outputs and related stuff   This also works in cases like ssh that prohibits piping passwords to it

User · Answer

Just want to add one more way  Found it elsewhere  and is quite simple  Say I want to pass yes for all the prompts at command line for a command  execute command   Then I would simply pipe yes to it    yes   execute command   This will use yes as the answer to all yes no prompts

User · Answer

Many ways  pipe your input  echo  yes no maybe    your program   redirect from a file  your program  lt  answers txt   use a here document  this can be very readable   your program  lt  lt  ANSWERS yes no maybe ANSWERS   use a here string  your program  lt  lt  lt    yes nno nmaybe n

[bash] Passing arguments to an interactive program non-interactively

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