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Full Discussion: Compare between current and next line and print
Top Forums Shell Programming and Scripting Compare between current and next line and print Post 302937617 by Don Cragun on Friday 6th of March 2015 02:00:39 PM
Old 03-06-2015
Quote:
Originally Posted by jaydeep_sadaria
Thanks dear... can u just brief me some what about code so that it can be useful to me in further. How it compare?

Regards
Jaydeep
Is this enough?
Code:
awk '
$3 == "M" {	# For each input line with "M" in the 3rd field...
	# If the previous line was an "M" line, note that no "*" line was found.
	if(m)	print ll, "DOWN"
	# Save the contents of this line, and set "m" to indicate that this
	# line is an "M" line.
	ll = $0
	m = 1
}
$3 == "*" {	# For each input line with "*" in the 3rd field...
	# Print the previus line and the current line.
	print ll, $0
	# Set "m" to indicate that we do not have any saved line.
	m = 0
}
END {	# We have hit end of input...
	# If we have a saved "M" line, print it...
	if(m)	print ll, "DOWN"
}' "IP FILE"	# End the script and specify the input file to be processed.

Last edited by Don Cragun; 03-06-2015 at 10:30 PM.. Reason: Fix typo (s/thee/the/).
 

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LEARN ABOUT REDHAT

gets

gets(n) 						       Tcl Built-In Commands							   gets(n)

__________________________________________________________________________________________________________________________________________________

NAME

       gets - Read a line from a channel

SYNOPSIS

       gets channelId ?varName?
_________________________________________________________________

DESCRIPTION

       This command reads the next line from channelId, returns everything in the line up to (but not including) the end-of-line character(s), and
       discards the end-of-line character(s).  If varName is omitted the line is returned as the result of the command.  If varName  is  specified
       then the line is placed in the variable by that name and the return value is a count of the number of characters returned.

       If  end	of file occurs while scanning for an end of line, the command returns whatever input is available up to the end of file.  If chan-
       nelId is in nonblocking mode and there is not a full line of input available, the command returns an empty string and does not consume  any
       input.	If  varName is specified and an empty string is returned in varName because of end-of-file or because of insufficient data in non-
       blocking mode, then the return count is -1.  Note that if varName is not specified then the end-of-file	and  no-full-line-available  cases
       can produce the same results as if there were an input line consisting only of the end-of-line character(s).  The eof and fblocked commands
       can be used to distinguish these three cases.

SEE ALSO

       file(n), eof(n), fblocked(n)

KEYWORDS

       blocking, channel, end of file, end of line, line, nonblocking, read

Tcl									7.5								   gets(n)
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