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Top Forums Shell Programming and Scripting Insert missing field using perl,sed,awk Post 302586568 by vrclm on Monday 2nd of January 2012 12:28:39 PM
Old 01-02-2012
Insert missing field using perl,sed,awk

sample file (comma as field separators)

Code:
MessageFlow,1,BusIntBatchMgr,a
OOBEvent,1,BusIntBatchMgr,a
TaskEvents,1,,a
MTTrace,1,,a
MTWarning,,1,a
MessageFlow,1,Batch,a
OOBEvent,1,Batch,a
TaskEvents,1,,a
EAISAPIdocWizard,1,BusIntMgr,a
EAISAPBAPIWizard,1,BusIntMgr,a
EAISiebelWizard,1,BusIntMgr,a


In the above file, some lines have empty field3. The requirement is to fill the missing field3 with the previous field3 value.
i.e. In line 3,4&5, field3 should have the value BusIntBatchMgr. In line 8, field3 should have the value Batch.

Please let me know how to achieve this in PERL, SED or AWK (any combination). Please give me the code. Thanks in advance.

Last edited by Franklin52; 01-02-2012 at 04:03 PM.. Reason: Please use code tags for data and code samples, thank you
 

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FLPSED(1)						    BSD General Commands Manual 						 FLPSED(1)

NAME
flpsed -- annotate PostScript and PDF files SYNOPSIS
flpsed [-bdh] [-t tag=value] [-z zoom] [infile] [outfile] DESCRIPTION
The flpsed utility allows to annotate Postscript files. PDF files can be imported using the pdftops and exported using the ps2pdf utility. If the document was saved in Postscript format, added text can be reedited later. flpsed is useful for filling in forms or adding short com- ments. Batch mode can be used to automate form filling. The options are as follows: -b Batch mode (no GUI). In batch mode flpsed reads from stdin, if no infile is specified. Batch mode is useful in combination with the file ... -t option. -d Dump tags and values from a document to stdout (implies -b ). -h Show short help text. -t tag=value Set text to value where tag is tag Multiple -t options are allowed. -z zoom Set initial zoom value in percent. -geometry WxH+X+Y Set initial geometry. -iconic Start iconified. -scheme string Use fltk scheme string Currently fltk supports "plastic" and "gtk+". EXIT STATUS
The flpsed utility exits 0 on success, and >0 if an error occurs. EXAMPLES
The command: flpsed file1 will start flpsed and load file1 for interactive editing. The command: flpsed -b -t foo=bar file1 file2 will set the text of all text fields in file1 carrying the tag "foo" to "bar" and write the resulting Postscript document to file2 SEE ALSO
pdftops(1), ps2pdf(1) AUTHOR
Johannes Hofmann <Johannes.Hofmann@gmx.de> BSD
July 18 2007 BSD
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