How to open a bash/ssh session in shell script and run commands in the remote session?

Question

I try to do the following in a shell script:

bash;

in the bash context:

And In ./a.out context I need to simulate keystorkes:

yes
3292
no

How can I do it? All my tries failed since &, && and ; executes the subsequent command in the main shell context and not in the bash.

bash && echo "yes" > /dev/console

I have seen use expect in shell script aren't there any alternative using native shell commands ? I don't want to be dependent on other tools.

Community · Accepted Answer · 2017-05-23 11:49:59Z

2

Take a look into expect, which "talks" to interactive programs with the help of a user provided script.

Usage

expect ./interact

or making interact executable (chmod a+x interact):

./interact

where interact is the following script:

#!/usr/bin/expect
spawn ./a.out
send -- "yes\r"
expect "3292\r"
send -- "no\r"

This is just a simple example, the man page is full of in depth explanations and there are also example scripts which come with the installation.

References

edited May 23, 2017 at 11:49

CommunityBot

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answered Jun 7, 2013 at 9:35

Micha Wiedenmann

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