Shell Programming and Scripting

It's a good one, but I do not want to add to much complexity for the moment (now the script is very simple and I alredy need a lot of help ...). By the way, the host trick gives me some troubles. I've got some output with mac and port bat at console I see:

Unknown host (.1.3.6.1.2.1.17.4.3.1.1) (Connection timed out)

It seems that some of the parameters are going in the wrong place ... and there is the question of the output, I obtain a unique file and mac and port entries are all mixed so I have more ports with same number of different switches but there is no way to understand which one switch. I can solve this only in two ways, to add the switch ip string in each row something like

switch port mac
1.2.3.4 1 00:00:ecc. ecc.
.....

and having a unique file or having an output of separate files as proposed in my question. But how I can do this with scripting?

Code:

GET () { 
     while read Host
     do
         snmpwalk -Onq $Host $Pass $1 | sed -e s/^$1\.// -e s/\"//g | sort >> "/tmp/${Host}.txt"
     done < "${HostFile}"
   }

you'll have ONE file per host stored under '/tmp' directory.
As far as the parameters going in the 'wrong' place.... you'll have to troubleshoot it yourself: make sure your 'snmpwalk' signature jives with what you're scripting it with - should not be too bad!

About troubleshoothing you are right, you have helped so much so it's better that I do something as well, but I have no files, one per host in /tmp. I suspect that the error is due to this line of code

for OID in Mac Port
do eval "GET \$$OID > /tmp/${Script}\$$OID" ; done

indeed in /tmp I have something like

nameofscript.1.3.6.1.2.1.17.4.3.1.1

one for OID, when I use your

while read Host
do

nameofscript.OID is rewritten for every host in hostfile and so I don't have multiple entries. Correct? Can you be very patient and give me some more advice?

how about this:

Code:

GET () { 
     while read Host
     do
         snmpwalk -Onq $Host $Pass $1 | sed -e s/^$1\.// -e s/\"//g | sort >> "/tmp/${Host}.txt"
     done < "${HostFile}"
   }  

for OID in Mac Port
do eval "GET \$$OID" ; done

I just removed the file redirection from the 'for' loop, but you might need it for your 'JOIN'. WIth the redirection removed you should get ONE file (for both Mac and Port) for ONE host all in ONE file. I'm not sure if that's what you're looking for as a final result.

Tomorrow I will try your last suggestion. A unique file is good, but I have to prepend to every line of output the ip of the swith, if not I know where is the port and the associated mac but I don't know where among many switches. So at first look something is missing in your last lines of code.

anbu, thank you for noticing the problem -- I tested using my our set of test data.

In any event, here is a solution that will work with the original post using the
original data:

### Remove unwanted string from the update file.
sed 's/.* \(.*\)/\1/' upd_file > short_upd_file

### Create matched records: in update file and also in the master file.
egrep -f short_upd_file master_file > matched_file

### Create not matched records: in update file and not in matched file.
egrep -v -f matched_file short_upd_file > tmp_not_matched_file

### Add "NOT FOUND" to the end of not matched records.
sed 's/$/NOT FOUND/' tmp_not_matched_file > not_matched_file

### Merge and sort all records into solution file.
sort matched_file not_matched_file > solution_file

Code:

GET () { 
     while read Host
     do
         snmpwalk -Onq $Host $Pass $1 | sed -e s/^$1\.// -e s/\"//g | sort | sed  "s#^#${Host} #g">> "/tmp/${Host}.txt"
     done < "${HostFile}"
   }