tcl - How to spawn from a variable in Expect -

there processes take in password partway through computation. wish insert password @ start of process, trying create generic expect script spawn process, give password.

this expect script takes in password enter , process spawn:

#!/usr/bin/expect  set timeout 120  # program spawn , password send set pswd [lindex $argv 0] set program [lindex $argv 1]  spawn $program  expect "password:" send "$pswd\r"  interact 

this called bash function:

function vup {     echo -n "enter password: "     read -s pswd     echo     expectpassword.exp $pswd "vagrant up" } 

but error:

couldn't execute "vagrant up": no such file or directory     while executing "spawn [join $program]" 

this script seems work when use on program without arguments. i'm not sure how make work 1 variable number of arguments.

one way use eval:

eval spawn $program