shadow/tests/grouptools/gpasswd/19_gpasswd_change_passwd-root/gpasswd.exp

#!/usr/bin/expect

set timeout 2
expect_after default {puts stderr "\nFAIL"; exit 1}

if {$argc != 4} {
	puts "usage: gpasswd.exp <run_user> <group> <g_password> <user_prompt>"
	exit 1
}

set run_user    [lindex $argv 0]
set group       [lindex $argv 1]
set g_password  [lindex $argv 2]
set user_prompt [lindex $argv 3]

# First, switch to the testsuite user
# (otherwise, no password will be asked)
send_user "# switch to user '$run_user'\n"
send_user "# and expect a '$user_prompt' prompt\n"
spawn /bin/su $run_user

expect "$user_prompt"		;# Wait for the prompt

send_user "\n# make sure we are now '$run_user'"
send_user "\n# whoami should return '$run_user'"
send "\r"			;# restore the prompt for the logs
send "whoami\r"			;# Verify we are really testsuite

expect {
	timeout {
		puts "\ntimeout...FAIL"
		exit 1
	}
	"$run_user"
}

expect "$user_prompt"			;# Wait for the prompt

send_user "\n\n"
send_user "# now change '$group' 's password to '$g_password'\n"
send_user "# and expect a password prompt"
send "\r"			;# restore the prompt for the logs
send "gpasswd $group\r"		;# Change the password
expect "New Password: "		;# Wait for the Password: prompt
# Wait a little bit more (gpasswd is not ready to receive the password)
sleep 0.1
send "$g_password\r"		;# Send the password

send_user "\n# password '$g_password' sent\n\n"

send_user "Expect a new password prompt\n"
expect "Re-enter new password: "		;# Wait for the Password: prompt
# Wait a little bit more (gpasswd is not ready to receive the password)
sleep 0.1
send "$g_password\r"		;# Send the password

send_user "# expect prompt '$user_prompt'"

expect {
	# Wait for the new prompt
	"$user_prompt" {
		send "exit\r"
		expect "$ "
		puts "\nPASS"
		exit 0
	}
}

puts "\ntimeout...FAIL"
exit 1