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Full Discussion: Replacing data of output file with input
Top Forums Shell Programming and Scripting Replacing data of output file with input Post 302281349 by rwuerth on Wednesday 28th of January 2009 05:32:05 PM
Old 01-28-2009
Quote:
Originally Posted by bhagya2340
Yes you are missing something that... time.out file is very old file and it have data form past 5 years... so it have to be the final file and the reason i have used this code is
echo >> time.out; tr -d '\n' < runtime.out >> time.out
because the data in runtime.out is like this
Okay, suspected the second part, but you hadn't mentioned the format of runtime.out before so there was no way to know.

As I used comm with the -23 option, it wouldn't care about the old data of time.out at all, so that data would be safe, it would simply get the newest data from runtime.out, but the different file structure is a deal breaker unless you want to create a temporary file to hold data that can be comm'd to time.out.

I realize now that the reason you append a new line before inserting the data from runtime.out piped through tr to time.out is because after the last insertion, there is no newline since tr removes all newlines. I assume this is done on each and every record, so that you do wind up with newlines after each record, except for the last record.

I'd advisde changing this order if possible so the last record has a newline appended to it also, or that would be a deal breaker if you try to find a solution involving 'sed', because sed ignores lines w/o a newline at the end.

So if you make the line look as follows:
Code:
tr -d '\n' < runtime.out >> time.out;echo >> time.out

And then at the command prompt, one time only, before you run the collection script.

Code:
$> echo >> time.out

Then your good to go if you want to find a sed solution. That, however will take more time than I have today for me to look into it.
 

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LEARN ABOUT DEBIAN

tinydyndns-data

tinydyndns-data(8)					      System Manager's Manual						tinydyndns-data(8)

NAME

       tinydyndns-data - add or remove TYPE A record to or from data.cdb

SYNOPSIS

       tinydyndns-data add|remove fqdns

DESCRIPTION

       fqdns consists of one or more argument, each specifying a fully qualified domain name (fqdn).

       tinydyndns-data	adds a TYPE A record to or removes it from data.cdb in the current directory.  Other than tinydns-data(8), tinydyndns-data
       does not know about the source file data but changes the binary database data.cdb directly.

       tinydyndns-data reads data.cdb and copies its data to data.tmp.	While reading the records, tinydyndns-data checks for each fqdn  in  fqdns
       if  this  hostname  has a TYPE A record in data.cdb, drops the record when called with the option remove, or refuses to add the record when
       called with the option add.

       When called with the option add, tinydyndns-data then adds all new fqdns to data.tmp.  The data of the newly created records can optionally
       be controlled through the environment, see below.  Finally tinydyndns-data renames data.tmp to data.cdb.

OPTIONS

       add    For each fqdn in fqdns, add a TYPE A record for fqdn to data.cdb with the default IP address (127.14.14.14).

       remove For each fqdn in fqdns, remove all TYPE A records for fqdn from data.cdb.

ENVIRONMENT

       IP     The  environment	variable IP overrides the default IP address (``127.14.14.14'') for newly created records.  $IP must be a valid IP
	      address.

       TTL    time-to-live.  The environment variable TTL overrides the default time-to-live in seconds (0 if TTD is set, otherwise 5).  $TTL must
	      be an integer.

       TTD    time-to-die.  $TTD must be an integer, specifying a number of seconds.  If TTD is set, the timestamp of newly created records is set
	      to the current time plus $TTD seconds, and TTL is set to zero by default, so that tinydns(8) interpretes the timestamp  as  time-to-
	      die.   Note:  you  probably  want  to adjust SOA ttl, or create a wildcard record, to prevent DNS caches from caching nxdomain, when
	      using this feature.

       LOC    location.  $LOC must be two characters long.  If LOC is set, it specifies the client location for newly created records.

EXIT CODES

       tinydyndns-data exits 111 if anything goes wrong and leaves data.cdb unchanged.

       tinydyndns-data exits 0 if all fqdns were processed and the new data.cdb was written.

       For each fqdn in fqdns that tinydyndns-data was not able to remove or add (e.g., not there, or already there), it increases the	exit  code
       by one and exits non-zero (maximum is 100).

FILES

	./data.cdb
	./data.tmp

SEE ALSO

       tinydyndns-update(8), tinydyndns-conf(8)

       http://smarden.org/tinydyndns/

AUTHOR

       Gerrit Pape <pape@smarden.org>

																tinydyndns-data(8)
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