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Full Discussion: awk issue splitting a fixed-width file containing line feed in data
Top Forums Shell Programming and Scripting awk issue splitting a fixed-width file containing line feed in data Post 302991827 by pchang on Thursday 16th of February 2017 03:29:13 PM
Old 02-16-2017
awk issue splitting a fixed-width file containing line feed in data
Hi Forum.

I have the following script that splits a large fixed-width file into smaller multiple fixed-width files based on input segment type.

The main command in the script is:
Code:
awk -v search_col_pos=$search_col_pos -v search_str_len=$search_str_len -v segment_type="$segment_type" 'substr($0, search_col_pos, search_str_len) ~ segment_type {print $0}'

To call the script:
Code:
file_splitter.sh filename CO 33 2

Where CO is the segment_type to search for ($segment_type)
           33 is the start search position ($search_col_pos)
             2 is the length of the search string ($search_str_len)

The issue that I'm having is that some of the data columns in the source file contains some binary values along with a LF (Line Feed) character in it.

As a result, the awk command interprets the LF in the data as the end of the line and only partially returns the record. Anything after the LF in the data column is not returned. Therefore, I have an incomplete record.

How do I handle this issue?

Thanks.
 

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LEARN ABOUT DEBIAN

source

source(3tcl)						       Tcl Built-In Commands						      source(3tcl)

__________________________________________________________________________________________________________________________________________________

NAME

       source - Evaluate a file or resource as a Tcl script

SYNOPSIS

       source fileName

       source -encoding encodingName fileName													   |
_________________________________________________________________

DESCRIPTION

       This  command takes the contents of the specified file or resource and passes it to the Tcl interpreter as a text script.  The return value
       from source is the return value of the last command executed in the script.  If an error occurs in evaluating the contents  of  the  script
       then  the source command will return that error.  If a return command is invoked from within the script then the remainder of the file will
       be skipped and the source command will return normally with the result from the return command.

       The end-of-file character for files is "32" (^Z) for all platforms.  The source command will  read  files  up  to  this  character.   This
       restriction  does  not  exist for the read or gets commands, allowing for files containing code and data segments (scripted documents).	If
       you require a "^Z" in code for string comparison, you can use "32" or "u001a", which will be safely substituted by the  Tcl  interpreter
       into "^Z".

       The  -encoding  option  is  used  to specify the encoding of the data stored in fileName.  When the -encoding option is omitted, the system |
       encoding is assumed.

EXAMPLE

       Run the script in the file foo.tcl and then the script in the file bar.tcl:
	      source foo.tcl
	      source bar.tcl
       Alternatively:
	      foreach scriptFile {foo.tcl bar.tcl} {
		 source $scriptFile
	      }

SEE ALSO

       file(3tcl), cd(3tcl), encoding(3tcl), info(3tcl)

KEYWORDS

       file, script

Tcl																      source(3tcl)
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