How to fetch specific data from a file.? Post: 302998306

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Top Forums UNIX for Beginners Questions & Answers How to fetch specific data from a file.? Post 302998306 by Don Cragun on Tuesday 30th of May 2017 01:02:16 AM

05-30-2017

Registered User

Quote:

Originally Posted by scriptor

hi rudic

it works but how should I incorporate in script.

I am explaining my requirement as below.

Code:

 
 i have a file called vsy.txt.0 and vsy.txt.1
i need the data of day -1 but the day -1 data is present in 2 files which is vsy.txt.0 and vsy.txt.1
also file is getting updated at every 10 sec.
 what i need here is to sum the received count for 1 hr and save in a file.
in this way i can have a 24 entry on houry basis for received message .

---------- Post updated at 05:50 PM ---------- Previous update was at 01:04 PM ----------

please help me in this

It is hard to follow what you are doing. You say that you have one file with two names (vsy.txt.0 and vsy.txt.1) and that this file is updated every 10 seconds.

Is one of these files a symbolic link pointing to the other file? Are both files hard linked? If it is one file, why does it matter to your script which name is used?

How is the file being updated? Are the contents overwritten every 10 seconds? Is text appended to your file every 10 seconds?

If you just want a count of records added every hour and text is being appended to your file, why not just wait until the next day after all of the updates have been received and process your file once?

If you don't give us a clear description of what your computing environment is, what input file(s) you have, the format of that file (or those files) is, the format of the output you want, and sample input files and corresponding sample output that want to extract that the sample input, there is little incentive for the volunteers reading your post to try to guess at what you are trying to do and guess at something the stands very little chance of actually meeting your unspecified requirements.

With what you have told us, why doesn't running the code RudiC suggested every 10 seconds after your file has been updated give the the results you want until the day is done?

Don Cragun

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gencfu

GENCFU(1)							 ICU 50.1.2 Manual							 GENCFU(1)

NAME

       gencfu - Generates Unicode Confusable data files

SYNOPSIS

       gencfu  [  -h, -?, --help ] [ -V, --version ] [ -c, --copyright ] [ -v, --verbose ] [ -d, --destdir destination ] [ -i, --icudatadir direc-
       tory ] -r, --rules rule-file -w, --wsrules whole-script-rule-file -o, --out output-file

DESCRIPTION

       gencfu reads confusable character definitions in the input file, which are plain text files containing confusable character definitions	in
       the  input format defined by Unicode UAX39 for the files confusables.txt and confusablesWholeScript.txt.  This source (.txt) format is also
       accepted by ICU spoof detectors.  The files must be encoded in utf-8 format, with or without a BOM.  Normally the output data file has  the
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OPTIONS

       -h, -?, --help
	      Print help about usage and exit.

       -V, --version
	      Print the version of gencfu and exit.

       -c, --copyright
	      Embeds the standard ICU copyright into the output-file.

       -v, --verbose
	      Display extra informative messages during execution.

       -d, --destdir destination
	      Set the destination directory of the output-file to destination.

       -i, --icudatadir directory
	      Look  for  any necessary ICU data files in directory.  For example, the file pnames.icu must be located when ICU's data is not built
	      as a shared library.  The default ICU data directory is specified by the environment variable ICU_DATA.  Most configurations of  ICU
	      do not require this argument.

       -r, --rules rule-file
	      The source file to read.

       -w, --wsrules whole-script-rule-file
	      The whole script source file to read.

       -o, --out output-file
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VERSION

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							    24 May 2009 							 GENCFU(1)