How wait in expect?

How wait in expect?

3 Answers

1. Use expect “prompt>\r” instead of expect “prompt>”
2. Curly braces need to be on the same line as expect command, like this expect “prompt>\r” {
3. Use set timeout -1 to wait for the prompt infinitely, instead of 10 seconds.

What is expect in Tcl?

Expect is an extension to the Tcl scripting language written by Don Libes. The program automates interactions with programs that expose a text terminal interface. Expect, originally written in 1990 for the Unix platform, has since become available for Microsoft Windows and other systems.

What is an expect script?

Expect command or expect scripting language is a language that talks with your interactive programs or scripts that require user interaction. Expect scripting language works by expecting input, then the Expect script will send the response without any user interaction.

What is expect eof?

The final command ” expect eof ” causes the script to wait for the end-of-file in the output of passwd . Similar to timeout , eof is another keyword pattern. This final expect effectively waits for passwd to complete execution before returning control to the script. Take a step back for a moment.

How do I expect a bash script?

How to Use Expect In Bash Script

1. Step 1 : Create a new file. vi expectcmd.
2. Step 2 : Copy and paste below given content in file.
3. Step 3: Make your file executable by owner of file , run the given below command.
4. Step 4: Give commands as argument along with expectcmd script.

What is expect in Linux?

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. It behaves just like Expect and Tk’s wish. Expect can also be used directly in C or C++ (that is, without Tcl).

What is r in expect script?

\r is carriage return, Ctrl-M or character 015. In an interactive unix context, when you’re typing them (or simulating typing them, as with expect), they are interchangeable. Linefeed is the formal line-terminator character, but tty devices normally translate carriage return to linefeed on input.

What is r in Expect script?

How do you end an expect script?

close would close the connection to the other process, so in sense acting as the reverse of expect eof . Again, your script could continue after this. Using close just before exiting the script doesn’t do much, as an exit will also implicitly close . Then there’s exit that exits your script.

How does expect command work?

expect command or scripting language works with scripts that expect user inputs. It automates the task by providing inputs. First we write a script that will be needing inputs from users and then we will write another script using expect to automate the task.

How do I run a command in expect script?

The first line defines the expect command path which is #!/usr/bin/expect . On the second line of code, we disable the timeout. Then start our script using spawn command. We can use spawn to run any program we want or any other interactive script.

How to add a sleep between each command?

I am trying to automate switch commands. It’s almost all good, but when the expect script reads each line from the file containing my switch commands (listed line by line), the switch seems to stop after about 10 or 15 commands, i think the buffer is too small. How can I add in a sleep between each command that is read from the file?

How to use expect command in Linux with examples?

If a filename is provided, log_file will record a transcript of the session in the file. causes the script to sleep for the given number of seconds. Because there isn’t standard in. the script is not work. Please use expect eof and exit .

How to use expect command in cmdref.net?

Expect Commands Commands Note expect expect “STRING” waits until one of the patterns matches interact gives control of the current process to log_file log_file FILE If a filename is provided, log_file will sleep sleep 2 causes the script to sleep for the given

What’s the difference between expect and sleep in Tcl?

There are three different entities: The sleep command from the Tclx package. According to the documentation, it takes a decimal argument, taken to be the number of seconds to sleep. However, the fraction part is truncated. That means sleep 2.5 will sleep for two seconds. The sleep command from the Expect package.