03-01-2013
Script to compare pattern and print a different pattern in each line
Hi,
I am writing a shell script to parse some files, and gather data.
The data in the files is displayed as below.
.......xyz: [1234] abz: [1234]......qrt: [2312]....
.......xyz: [1231] abz: [2414]......qrt: [1231]...
I have tried using awk and cut, but the position of these values keep changing, so I wasn't able to get the required output using awk and split it into columns.
The value before the ":' is always constant, the value in the brackets only keep changing.
I need an option which prints in the following manner based on what is being grepped.
it should be a one liner as it is part of a much bigger script, and it should be able to compare the value in the brackets for "xyz:" and "abz:" and if it is the samee then it should print "qrt: [2312]"
In the above example lines the output should be only "qrt: [2312]" as that is the only line with the matching value in the bracket of "xyz:" and "abz:".
Please help
Thanks
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GREP(1) General Commands Manual GREP(1)
NAME
grep - search a file for a pattern
SYNOPSIS
grep [ option ... ] pattern [ file ... ]
DESCRIPTION
Grep searches the input files (standard input default) for lines (with newlines excluded) that match the pattern, a regular expression as
defined in regexp(6). Normally, each line matching the pattern is `selected', and each selected line is copied to the standard output.
The options are
-c Print only a count of matching lines.
-h Do not print file name tags (headers) with output lines.
-i Ignore alphabetic case distinctions. The implementation folds into lower case all letters in the pattern and input before interpre-
tation. Matched lines are printed in their original form.
-l (ell) Print the names of files with selected lines; don't print the lines.
-L Print the names of files with no selected lines; the converse of -l.
-n Mark each printed line with its line number counted in its file.
-s Produce no output, but return status.
-v Reverse: print lines that do not match the pattern.
Output lines are tagged by file name when there is more than one input file. (To force this tagging, include /dev/null as a file name
argument.)
Care should be taken when using the shell metacharacters $*[^|()= and newline in pattern; it is safest to enclose the entire expression in
single quotes '...'.
SOURCE
/sys/src/cmd/grep.c
SEE ALSO
ed(1), awk(1), sed(1), sam(1), regexp(6)
DIAGNOSTICS
Exit status is null if any lines are selected, or non-null when no lines are selected or an error occurs.
GREP(1)