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Full Discussion: Parsing expect_out using regex in expect script
Top Forums Shell Programming and Scripting Parsing expect_out using regex in expect script Post 302745041 by ashy_g on Sunday 16th of December 2012 11:41:12 AM
Old 12-16-2012
Parsing expect_out using regex in expect script
Hi,

I am trying to write an expect script. Being a newbie in expect, maybee this is a silly doubt but i am stuck here.

So essentially , i want the o/p of one router command to be captured . Its something like this

Code:
Stats

Input Rx   	: 1234
Input Bytes 	: 3456

My expect script looks something like this

Code:
  1 #!/usr/bin/expect -f
  2 set prompt {>}
  3 set timeout 20
  4 set user [lindex $argv 0]
  5 set password [lindex $argv 1]
  6 spawn su $user
  7 expect "Password:"
  8 send "$password\r";
  9 send -- "ls\r"
 10 expect $prompt
 11 puts "The output is $expect_out(buffer)"
 12
 13 interact


Now, i see the complete o/p by the last statement. Not able to get the correct syntax of -re for parsing the o/p. Just want to store the variables
Input Rx and input bytes.


Any help is really appreciated.

Thanks,
ashy_g
Last edited by Scott; 12-17-2012 at 03:54 PM.. Reason: Code tags
 

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LEARN ABOUT SUSE

lindex

lindex(n)						       Tcl Built-In Commands							 lindex(n)

__________________________________________________________________________________________________________________________________________________

NAME

       lindex - Retrieve an element from a list

SYNOPSIS

       lindex list ?index...?
_________________________________________________________________

DESCRIPTION

       The  lindex  command  accepts  a  parameter,  list, which it treats as a Tcl list. It also accepts zero or more indices into the list.  The
       indices may be presented either consecutively on the command line, or grouped in a Tcl list and presented as a single argument.

       If no indices are presented, the command takes the form:
	      lindex list
       or
	      lindex list {}
       In this case, the return value of lindex is simply the value of the list parameter.

       When presented with a single index, the lindex command treats list as a Tcl list and returns the index'th element from it (0 refers to  the
       first  element of the list).  In extracting the element, lindex observes the same rules concerning braces and quotes and backslashes as the
       Tcl command interpreter; however, variable substitution and command substitution do not occur.  If index is negative  or  greater  than	or
       equal  to  the number of elements in value, then an empty string is returned.  The interpretation of each simple index value is the same as |
       for the command string index, supporting simple index arithmetic and indices relative to the end of the list.

       If additional index arguments are supplied, then each argument is used in turn to select an element from the previous  indexing	operation,
       allowing the script to select elements from sublists.  The command,
	      lindex $a 1 2 3
       or
	      lindex $a {1 2 3}
       is synonymous with
	      lindex [lindex [lindex $a 1] 2] 3

EXAMPLES

	      lindex {a b c}
		    -> a b c
	      lindex {a b c} {}
		    -> a b c
	      lindex {a b c} 0
		    -> a
	      lindex {a b c} 2
		    -> c
	      lindex {a b c} end
		    -> c
	      lindex {a b c} end-1
		    -> b
	      lindex {{a b c} {d e f} {g h i}} 2 1
		    -> h
	      lindex {{a b c} {d e f} {g h i}} {2 1}
		    -> h
	      lindex {{{a b} {c d}} {{e f} {g h}}} 1 1 0
		    -> g
	      lindex {{{a b} {c d}} {{e f} {g h}}} {1 1 0}
		    -> g

SEE ALSO

       list(n), lappend(n), linsert(n), llength(n), lsearch(n), lset(n), lsort(n), lrange(n), lreplace(n), string(n)				   |

KEYWORDS

       element, index, list

Tcl									8.4								 lindex(n)
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