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Shell Programming and Scripting
Expect script exiting too fast if used without interact.
Post 302486080 by clakkad on Friday 7th of January 2011 12:26:24 AM
01-07-2011
Expect script exiting too fast if used without interact.
Hi
I'm working on an Expect script that is supposed to log-into a remote server and run some steps and exit. In the script I first spawn a 'ssh' session to the server and then after logging in I 'send' all the necessary steps ( with a '\r' at the end, so that they get automatically executed the moment they are sent to the remote process) . Some of these steps take about a min to complete and the control isn't (and shouldn't be) turned over to the expect script before completion.
Now the wierd problem is, if I end my expect script with a 'interact' statement then every single line of the script is hit and executed. But if I remove the 'interact' then most of the intermediate 'send' statements are skipped and the script all of a sudden comes to a halt.
Trouble is I dont have to use the interact statement because I want the script to finish and exit by itself and not give the control to user at the end.
I dont have much experience with expect scripting but I guess this problem is because the script is expecting the response back way-too-soon for the intermediate steps to finish and turn-around, due to which some statements are overlooked. So to put sufficient delay between send commands I used 'after' /'wait' statements in-between...but to no avail. Setting timeout to a big number also didn't help
Please let me know if there is a solution to this problem.
I'm working on an Expect script that is supposed to log-into a remote server and run some steps and exit. In the script I first spawn a 'ssh' session to the server and then after logging in I 'send' all the necessary steps ( with a '\r' at the end, so that they get automatically executed the moment they are sent to the remote process) . Some of these steps take about a min to complete and the control isn't (and shouldn't be) turned over to the expect script before completion.
Now the wierd problem is, if I end my expect script with a 'interact' statement then every single line of the script is hit and executed. But if I remove the 'interact' then most of the intermediate 'send' statements are skipped and the script all of a sudden comes to a halt.
Trouble is I dont have to use the interact statement because I want the script to finish and exit by itself and not give the control to user at the end.
I dont have much experience with expect scripting but I guess this problem is because the script is expecting the response back way-too-soon for the intermediate steps to finish and turn-around, due to which some statements are overlooked. So to put sufficient delay between send commands I used 'after' /'wait' statements in-between...but to no avail. Setting timeout to a big number also didn't help
Please let me know if there is a solution to this problem.
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LEARN ABOUT CENTOS
installsieve
INSTALLSIEVE(1) General Commands Manual INSTALLSIEVE(1) * NAME
installsieve - user utility for managing sieve scripts SYNOPSIS
installsieve DESCRIPTION
installsieve is a utility that allows users to manage their sieve scripts kept on the server. OPTIONS
-v <name> View script with the given name. The script if retrieved sucessfully is output to standard output. -l List all of the scripts currently on the server. If one of the scripts is active a arrow is printed indicating that it is the active script. -p <port> Port to connect to. If left off this defaults to "sieve" as defined in /etc/services. -i <file> Install a file onto the server. If a script with the same name already exists on the server it is overwritten. Upon sucessfully putting the script on the server the script is set active. If <file> has the extension .script it is chopped when put on the server since sieve names may not contain a '.'. -a <name> Set <name> as the active script. The list of available names can be obtained from the '-l' option.. -d <name> Delete the sieve script on the server with <name>. -m <mechanism> Force installsieve to use <mechanism> for authentication. If not specified the strongest authentication mechanism is chosen. -g <name> Get the sieve script with <name> and save it to disk with a ".script" extension. If a file with that name already exists it is overwritten. -u <user> Userid/Authname to use for authentication; by default, the current user. CMU
Project Cyrus INSTALLSIEVE(1)