expect

README

Expect for Windows Powered by GopherLua

• A tool like expect on Linux.
• Scripts are to be written with Lua (GopherLua)
• Some built-in functions exists:
  • rc=expect(A,B,C...) accesses CONOUT$ directly and watches the cursor-line (0.1 seconds interval)
    • When A was found in cursor-line, rc=0
    • When B was found in cursor-line, rc=1
    • When C was found in cursor-line, rc=2
    • :
    • When error occured, rc=-1
    • When timeout occurs, rc=-2 (set variable like timeout=(SECONDS),default 1 hour)
  • send() causes keyboard events against CONIN$.
    • send(S,MS) waits MS [m-seconds] per 1-character (for plink.exe)
  • sendln() is same as send() but append CR.
  • spawn() starts applications and returns true on success or false on failure.
  • echo() controls echoback
    • echo(true): echo on
    • echo(false): echo off
    • echo("..."): print a string
  • arg[] contains commandline arguments (arg[0] is scriptname)

Sample

sample.lua:

echo(true)
if spawn([[c:\Program Files\Git\usr\bin\ssh.exe]],"foo@example.com") then
    expect("password:")
    echo(false)
    send("PASSWORD\r")
    expect("~]$")
    echo(true)
    send("exit\r")
end

On the command prompt:

$ expect.exe sample.lua
foo@example.com's password:
Last login: Thu Jun 15 13:21:57 2017 from XXXXXXXXXXXX.XXXX.XX.XXX.XXX.XXXXXXX.XX.XX
FreeBSD 9.1-RELEASE-p24 (XXXXXXXX) #0: Thu Feb  5 10:03:29 JST 2015

Welcome to FreeBSD!

[foo@XXXXXXX ~]$ exit
logout
Connection to example.com closed.

The script embeded in the batchfile:

@expect.exe "%~f0"
@exit /b

-- Lines starting with '@' are replaced to '--@' by expect.exe
-- to embed the script into the batchfile.

echo(true)
if spawn([[c:\Program Files\Git\usr\bin\ssh.exe]],"foo@example.com") then
    expect("password:")
    echo(false)
    send("PASSWORD\r")
    expect("~]$")
    echo(true)
    send("exit\r")
end