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Full Discussion: Expect: How to read buffer for spawn
Top Forums Shell Programming and Scripting Expect: How to read buffer for spawn Post 302316053 by Lokesh Agrawal on Thursday 14th of May 2009 01:28:06 AM
Old 05-14-2009
Lightbulb Expect: How to read buffer for spawn
Hi All,

I have to write one expect script to login to one system.
I am using

set timeout -1
match_max 100000
spawn ssh root@hostname


Now when I do spawn ssh to that host it send some warning message and one challenge
Challenge: 111-2345

I need to read this challenge value and has to pass as password.

Can anyone tell me from which variable or buffer I can read output of spawn?


Thanks in advance

Regards,
Lokesh Agrawal
 

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LEARN ABOUT CENTOS

spawn.h

spawn.h(3HEAD)                                                        Headers                                                       spawn.h(3HEAD)

NAME

       spawn.h, spawn - spawn

SYNOPSIS

       #include <spawn.h>

DESCRIPTION

       The <spawn.h> header defines the posix_spawnattr_t and posix_spawn_file_actions_t types used in performing spawn operations.

       The <spawn.h> header defines the flags that can be set in a posix_spawnattr_t object using the posix_spawnattr_setflags() function:

       POSIX_SPAWN_RESETIDS
       POSIX_SPAWN_SETPGROUP
       POSIX_SPAWN_SETSCHEDPARAM
       POSIX_SPAWN_SETSCHEDULER
       POSIX_SPAWN_SETSIGDEF
       POSIX_SPAWN_SETSIGMASK

       Inclusion of the <spawn.h> header can make visible symbols defined in the <sched.h>, <signal.h>, and <sys/types.h> headers.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Interface Stability          |Standard                     |
       +-----------------------------+-----------------------------+

SEE ALSO

       sched.h(3HEAD), semaphore.h(3HEAD), signal.h(3HEAD), types.h(3HEAD), attributes(5), standards(5)

SunOS 5.10                                                          10 Sep 2004                                                     spawn.h(3HEAD)
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