CODEWITHSUNDEEP
linuxsshtclexpect
anudeep
anudeep

Reputation: 413

unable to run remote ssh commands with expect script

I am unable to run commands on remote host using expect script.It just logs in to the remote host and exits.Here is the code

#!/usr/bin/expect
set timeout 15
puts "connecting to the storage\n"
set user [lindex $argv 0]
set host [lindex $argv 1]
set pass "root123"
spawn ssh "$user\@$host"
expect {
"Password: " {
send "$pass\r"
sleep 1
expect {
"$ " {
  send "isi quota quotas list|grep ramesh\r" }
"$ " {
  send "exit\r" }

}
}
"(yes/no)? " {
send "yes\r"
expect {
"$ " { send "ls\r" }
"$ " { send "exit\r" }

"> " {}
}
}
default {
send_user "login failed\n"
exit 1
}
}

It only gets into the remote host and exits. [deep@host1:~]$ ./sshexpect user1 host2 connecting to the storage

spawn ssh user1@host2
Password:
host2$
[deep@host1:~]$

Is the syntax wrong? I am new to tcl scripting.

Upvotes: 1

Views: 905

Answers (1)

glenn jackman
glenn jackman

Reputation: 246807

Indentation would help a lot:

expect {
    "Password: " {
        send "$pass\r"
            sleep 1
            expect {
                "$ " { send "isi quota quotas list|grep ramesh\r" }
                "$ " { send "exit\r" }
            }
    }
    "(yes/no)? " {
        send "yes\r"
            expect {
                "$ " { send "ls\r" }
                "$ " { send "exit\r" }
                "> " {}
            }
    }
    default {
        send_user "login failed\n"
            exit 1
    }
}

The problem is here:

            expect {
                "$ " { send "isi quota quotas list|grep ramesh\r" }
                "$ " { send "exit\r" }
            }

You're matching the same pattern twice: I suspect expect is ignoring the first action block, and just using the 2nd one; thus you exit immediately.

This is what you want to do:

expect {
    "(yes/no)? " { send "yes\r"; exp_continue }
    "Password: " { send "$pass\r"; exp_continue }
    timeout      { send_user "login failed\n"; exit 1 }
    -re {\$ $}
}
send "isi quota quotas list|grep ramesh\r"

expect -re {\$ $}
send "ls\r"

expect -re {\$ $}
send "exit\r"

expect eof

Upvotes: 1

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