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Full Discussion: Until string from remote command equals value run remote command
Top Forums Shell Programming and Scripting Until string from remote command equals value run remote command Post 302772103 by $scipt_Kid on Saturday 23rd of February 2013 02:40:26 AM
Old 02-23-2013
set variable value based on if string existing in output
I solved my issue by using the following code

Code:
#!/bin/bash
function GET_STATUS {
     #values Active Passive Failed
     ssh  -a localhost '/home/user/fakecommand.sh'
}

STATE="unknown"
until [[ "$STATE" = "Failed" ]]
do
echo $STATE
sleep 5


STATUS=`GET_STATUS`
echo $STATUS | grep Active && STATE="Active"
echo $STATUS | grep Passive && STATE="Passive"
echo $STATUS | grep Failed && STATE="Failed"
done







bash script: I want to wait until the output from function contains certain values

Note: this function ssh's into a remote server runs a command and outputs data to standard out



Code:
function GET_STATUS {    
     ssh  -a localhost '/home/user/fakecommand.sh'
}

Unfortunately the output from the remote command changes length in both line numbers and sometimes it has extra white space..

It looks something like this....



Running command.....


Code:
variable length:stuff i dont need1                stuff i dont need2                        status                          stuff i dont need3
variable length:stuff that i dont need 1                         stuff i dont need2                        Active                          stuff i dont need3

I want to perform actions based on the value of the status column
There are only 3 values..... Active,Passive,Failed

I have written the following code, but i think it could be much better.

Code:
GET_STATUS  | grep "Active" && STATE="Active" # I Set the variable first so that i dont have to wait for the sleep if it is already in Active
        until [[ "$STATE" = "Active" ]]
                do
                echo "Running GET_STATUS" && sleep 1
                GET_STATUS  | grep "Active" && STATE="Active"
done

Can anyone think of a way i can set the the variable $STATE
Any heap would be greatly appreciated


Thanks
Last edited by $scipt_Kid; 02-23-2013 at 09:59 AM.. Reason: I found a solution
 

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LEARN ABOUT DEBIAN

bup-margin

bup-margin(1)						      General Commands Manual						     bup-margin(1)

NAME

       bup-margin - figure out your deduplication safety margin

SYNOPSIS

       bup margin [options...]

DESCRIPTION

       bup margin  iterates  through  all  objects  in	your  bup repository, calculating the largest number of prefix bits shared between any two
       entries.  This number, n, identifies the longest subset of SHA-1 you could use and still encounter a collision between your object ids.

       For example, one system that was tested had a collection of 11 million objects (70 GB), and bup margin returned 45.  That  means  a  46-bit
       hash  would be sufficient to avoid all collisions among that set of objects; each object in that repository could be uniquely identified by
       its first 46 bits.

       The number of bits needed seems to increase by about 1 or 2 for every doubling of the number of objects.  Since SHA-1 hashes have 160 bits,
       that  leaves 115 bits of margin.  Of course, because SHA-1 hashes are essentially random, it's theoretically possible to use many more bits
       with far fewer objects.

       If you're paranoid about the possibility of SHA-1 collisions, you can monitor your repository by running bup margin occasionally to see	if
       you're getting dangerously close to 160 bits.

OPTIONS

       --predict
	      Guess  the offset into each index file where a particular object will appear, and report the maximum deviation of the correct answer
	      from the guess.  This is potentially useful for tuning an interpolation search algorithm.

       --ignore-midx
	      don't use .midx files, use only .idx files.  This is only really useful when used with --predict.

EXAMPLE

	      $ bup margin
	      Reading indexes: 100.00% (1612581/1612581), done.
	      40
	      40 matching prefix bits
	      1.94 bits per doubling
	      120 bits (61.86 doublings) remaining
	      4.19338e+18 times larger is possible

	      Everyone on earth could have 625878182 data sets
	      like yours, all in one repository, and we would
	      expect 1 object collision.

	      $ bup margin --predict
	      PackIdxList: using 1 index.
	      Reading indexes: 100.00% (1612581/1612581), done.
	      915 of 1612581 (0.057%)

SEE ALSO

       bup-midx(1), bup-save(1)

BUP

       Part of the bup(1) suite.

AUTHORS

       Avery Pennarun <apenwarr@gmail.com>.

Bup unknown-															     bup-margin(1)
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