Advertisement

07.28.2007 at 06:54PM PDT, ID: 22726897
[x]
Attachment Details

Problem with an expect script using netcat under GNU/Linux

[x]
The Solution Rating System

With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating.

  • The Grade of the Solution
  • The Zone Rank of the Expert Providing the Solution
  • The Number of Author and Expert Comments
  • The Number of Experts Contributing
  • The Feedback of the Community

Your Input Matters
Because of the way the system is set up, the most important variable in this equation is you. As a member of Experts Exchange, you are able to cast your vote on the quality of the solutions in regard to how complete, accurate, helpful and easy to understand each solution is. When you provide your feedback, each rating is adjusted accordingly. So, if you see a solution that has a poor rating that you think is a good solution, let us know by rating it. As you do, the rating will be adjusted and will become more accurate for other members of our site.

If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support.

Thank you!

7.2
Tags:

netcat, expect, script

I am using expect under GNU/Linux. I am also using netcat (nc).
My problem is that when I run the following expect script it does not work. It never matches one of the choices in the expect list. I suspect that I cannot do what I want and hence the question to an expert. The problem may be with the fact that spawn is not able to synchronize with the command line I have issued. So far I have enabled debug and have seen that there is a problem with the parent being synchronized with the child.

Does anyone know of a way to do the equivalent and have it work with expect?

spawn echo "CMDTYPE" | nc dhcp66 17777
expect {
   "VIDEO"  { puts "video product" }
   "DATA"   { puts "data product" }
}

# this does work (example only)
spawn echo "VIDEO"
expect {
   "VIDEO"  { puts "video product" }
   "DATA"   { puts "data product" }
}
Answered By: Anthony2000
Expert Since: 07/17/2000
Accepted Solutions: 134
Computer Expertise: Beginner
Anthony2000 has been an Expert for 8 years 5 months, during which he has posted 648 comments and answered 134 questions. Anthony2000 is just one of 57 experts in the TCL Scripting Language Zone. 1 expert collaborated on this answer, which was graded a "B" by the asker.
 
 
20081119-EE-VQP-47