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   expect    ( 1 )

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Вступление (Introduction)

Expect is a program that "talks" to other interactive programs
       according to a script.  Following the script, Expect knows what
       can be expected from a program and what the correct response
       should be.  An interpreted language provides branching and high-
       level control structures to direct the dialogue.  In addition,
       the user can take control and interact directly when desired,
       afterward returning control to the script.

       Expectk is a mixture of Expect and Tk.  It behaves just like
       Expect and Tk's wish.  Expect can also be used directly in C or
       C++ (that is, without Tcl).  See libexpect(3).

       The name "Expect" comes from the idea of send/expect sequences
       popularized by uucp, kermit and other modem control programs.
       However unlike uucp, Expect is generalized so that it can be run
       as a user-level command with any program and task in mind.
       Expect can actually talk to several programs at the same time.

       For example, here are some things Expect can do:

              •   Cause your computer to dial you back, so that you can
                  login without paying for the call.

              •   Start a game (e.g., rogue) and if the optimal
                  configuration doesn't appear, restart it (again and
                  again) until it does, then hand over control to you.

              •   Run fsck, and in response to its questions, answer
                  "yes", "no" or give control back to you, based on
                  predetermined criteria.

              •   Connect to another network or BBS (e.g., MCI Mail,
                  CompuServe) and automatically retrieve your mail so
                  that it appears as if it was originally sent to your
                  local system.

              •   Carry environment variables, current directory, or any
                  kind of information across rlogin, telnet, tip, su,
                  chgrp, etc.

       There are a variety of reasons why the shell cannot perform these
       tasks.  (Try, you'll see.)  All are possible with Expect.

       In general, Expect is useful for running any program which
       requires interaction between the program and the user.  All that
       is necessary is that the interaction can be characterized
       programmatically.  Expect can also give the user back control
       (without halting the program being controlled) if desired.
       Similarly, the user can return control to the script at any time.