Shell Scripts: Automate User Input
· christian · ansible, bash, infrastructure code, linux, shell
The tool expect makes it possible to automate keyboard
inputs in shell scripts and programs.
#!/usr/bin/expect
set timeout 600
spawn /usr/share/jitsi-meet/scripts/install-letsencrypt-cert.sh
expect "* email * \\\[ENTER\\\]: "
send "mail@example.com\n"
expect eof
Execute just like a “normal” shell script:
chmod a+x expect-script
./expect-script
expect starts the actual program, waits for the input of
Enter your email and press [ENTER]: and types in the email address
afterwards.
As Ansible task
- name: Execute lets encrypt bootstrap script
shell: |
set timeout 600
spawn /usr/share/jitsi-meet/scripts/install-letsencrypt-cert.sh
expect "* email * \\\[ENTER\\\]: "
send "mail@example.com\n"
expect eof
args:
executable: /usr/bin/expect
environment:
DEBIAN_FRONTEND: noninteractive
