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Top Forums UNIX for Dummies Questions & Answers Concatenate three lines into one Post 302913094 by Don Cragun on Wednesday 13th of August 2014 04:18:44 PM
Old 08-13-2014
I think Corona688 missed the fact that you want CRLF line terminators in your output too. To do that, this trivial modification to his code:
Code:
awk '{ gsub(/[\r\n]/, ""); L=L$0 } /<\/Commit>/ { print L "\r"; L="" }' inputfile > outputfile

should do what you want as long as the 1st line in every set of 3 adjacent lines in your input file contains "client" starting in column 29 (columns are numbered starting from 1; not 0; in awk. If you want to discard other types of records, this more complicated script should work:
Code:
awk '
cnt {	out = out $0
	if(--cnt == 0) {
		gsub("\r", "", out)
		print out "\r"
	}
	next
}
substr($0, 29, 6) == "client" {
	cnt = 2
	out = $0
}' inputfile > outuptfile

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COLRM(1)						    BSD General Commands Manual 						  COLRM(1)

NAME
colrm -- remove columns from a file SYNOPSIS
colrm [start [stop]] DESCRIPTION
The colrm utility removes selected columns from the lines of a file. A column is defined as a single character in a line. Input is read from the standard input. Output is written to the standard output. If only the start column is specified, columns numbered less than the start column will be written. If both start and stop columns are spec- ified, columns numbered less than the start column or greater than the stop column will be written. Column numbering starts with one, not zero. Tab characters increment the column count to the next multiple of eight. Backspace characters decrement the column count by one. ENVIRONMENT
The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of colrm as described in environ(7). EXIT STATUS
The colrm utility exits 0 on success, and >0 if an error occurs. SEE ALSO
awk(1), column(1), cut(1), paste(1) HISTORY
The colrm command appeared in 3.0BSD. BSD
August 4, 2004 BSD
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