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Top Forums Shell Programming and Scripting Formatting a text file based on newline and delimiter characters Post 302117098 by ntekupal on Thursday 10th of May 2007 05:46:23 PM
Old 05-10-2007
Formatting a text file based on newline and delimiter characters

Hi Everybody,

I need some help on formatting the files coming into unix box on the fly.
I get a file some thing like this in a single line.

Code:
ISA^M00^M          ^M00^M          ^M14^M006929681900   ^M01^M095449419      ^M061130^M2240^MU^M00401^M000003791^M0^MP^M>~GS^MPO^M006929681900^M095449419^M20061130^M2240^M41^MX^M004010~ST^M850^M000000059~BEG^M00^MNE^M11302346F2600^M^M20061130~REF^MIA^M0028910^MTANKO COMPANY~FOB^MPP^MDE^M00300DO~ITD^M^M^M^M^M^M^M^M^M^M^M^M 02%  60  DAYS~DTM^M010^M20061214~TD5^M^M^M^M^MAUTHORIZED CARRIER~

Now all I want is :
1) To identify my delimiter character at 4th position(which is ^M[single character] for this file and it could be varying for other files) 
2) Change the delimiter character whatever it is to *(asterisk)
3) To identify my newline character at 105 position(which is a tilde(~) in this file and it could be varying for other files)
4) Break into new line when ever there is a newline character which cud be ~ or any thing else.
5)Finally changed file should look like below :
ISA*00*          *00*          *14*006929681900   *01*095449419      *061130*2240*U*00401*000003791*0*P*>
GS*PO*006929681900*095449419*20061130*2240*41*X*004010
ST*850*000000059
BEG*00*NE*11302346F2600**20061130
REF*IA*0028910*TANKO COMPANY
FOB*PP*DE*00300DO
ITD************ 02%  60  DAYS
DTM*010*20061214
TD5*****AUTHORIZED CARRIER
6)Also when the script is run on already formatted file like above it should not disturb the file since it is already in perfect shape.

I am new to the shell script and my part of struggle I did by looking threads in this forum but my requirement did not match any Smilie
Please help me with the script.

Thanks in advance,
Raj.
 

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fold(1) 						      General Commands Manual							   fold(1)

NAME
fold - fold long lines for finite width output device SYNOPSIS
width] [file ...] Obsolete form: width] [file ...] DESCRIPTION
The command is a filter that folds the contents of the specified files, breaking the lines to have a maximum of width column positions (or bytes, if the option is specified). The command breaks lines by inserting a newline character so that each output line is the maximum width possible that does not exceed the specified number of column positions (or bytes). A line cannot be broken in the middle of a char- acter. If no files are specified or if a file name of is specified, the standard input is used. The command is often used to send text files to line printers that truncate, rather than fold, lines wider than the printer is able to print. If the backspace, tab, or carriage-return characters are encountered in the input, and the option is not specified, they are treated spe- cially as follows: Backspace The current count of line width is decremented by one, although the count never becomes negative. Thus, the char- acter sequence character-backspace-character counts as using one column position, assuming both characters each occupy a single column position. does not insert a newline character immediately before or after any backspace character. Tab Each tab character encountered advances the column position pointer to the next tab stop. Tab stops are set 8 col- umns apart at column positions 1, 9, 17, 25, 33, etc. Carriage-return The current count of line width is set to zero. does not insert a newline character immediately before or after any carriage-return character. Note that may affect any underlining that is present. Options The command recognizes the following options and command-line arguments: Count width in bytes rather than in column positions. Break the line on the last blank character found before the specified number of column positions (or bytes). If none are found, break the line at the specified line length. Specify the maximum line length, in column positions (or bytes if is specified). The default value is 80. width should be a multiple of 8 if tabs are present, or the tabs should be expanded using before processing by (see expand(1)). The option is obsolescent and may be removed in a future release. EXTERNAL INFLUENCES
Environment Variables determines the interpretation of text as single- and/or multi-byte characters. determines the language in which messages are displayed. If or is not specified in the environment or is set to the empty string, the value of is used as a default for each unspecified or empty variable. If is not specified or is set to the empty string, a default of "C" (see lang(5)) is used instead of If any internationalization variable contains an invalid setting, behaves as if all internationalization variables are set to "C". See environ(5). International Code Set Support Single- and multi-byte character code sets are supported. SEE ALSO
expand(1). STANDARDS CONFORMANCE
fold(1)
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