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Top Forums Shell Programming and Scripting awk read in file1, gsub in file2, print to file3 Post 302878753 by msmehaffey on Sunday 8th of December 2013 06:38:55 PM
Old 12-08-2013
awk read in file1, gsub in file2, print to file3

I'm trying to use awk to do the following. I have file1 with many lines, each containing 5 fields describing an individual set. I have file2 which is a template config file with variable space holders to be replaced by the values in file1. I would like to substitute each set of values in file1 with the variable place holders in file2 and then print to a unique file3 for each row in file1:
file1
Code:
sample1 300 150 100 23
sample2 320 150 90 20
sample3 340 160 95 21

file2
...
Code:
<general>
execute=var1
range=var2
sub=var3
mu=var4
sigma=var5
</general>

...

file3.1
...
<general>
Code:
execute=sample1
range=300
sub=150
mu=100
sigma=23

</general>
...

and I would end up with file3.2 and file3.3 as well.

I am close with awk
Code:
'NR==FNR{a1=$1; a2=$2; a3=$3; next} {gsub(/var1/,a1); gsub(/var2/,a2); gsub(/var3/,a3)}1' file1 file2

But it only prints out to stdout with the last record values replaced.


Thanks for any help!

Last edited by jim mcnamara; 12-08-2013 at 07:53 PM..
 

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MERGE(1)						      General Commands Manual							  MERGE(1)

NAME
merge - three-way file merge SYNOPSIS
merge [ options ] file1 file2 file3 DESCRIPTION
merge incorporates all changes that lead from file2 to file3 into file1. The result ordinarily goes into file1. merge is useful for com- bining separate changes to an original. Suppose file2 is the original, and both file1 and file3 are modifications of file2. Then merge combines both changes. A conflict occurs if both file1 and file3 have changes in a common segment of lines. If a conflict is found, merge normally outputs a warning and brackets the conflict with and lines. A typical conflict will look like this: file A lines in file A ======= lines in file B file B If there are conflicts, the user should edit the result and delete one of the alternatives. OPTIONS
-A Output conflicts using the -A style of diff3(1), if supported by diff3. This merges all changes leading from file2 to file3 into file1, and generates the most verbose output. -E, -e These options specify conflict styles that generate less information than -A. See diff3(1) for details. The default is -E. With -e, merge does not warn about conflicts. -L label This option may be given up to three times, and specifies labels to be used in place of the corresponding file names in conflict reports. That is, merge -L x -L y -L z a b c generates output that looks like it came from files x, y and z instead of from files a, b and c. -p Send results to standard output instead of overwriting file1. -q Quiet; do not warn about conflicts. -V Print version number. DIAGNOSTICS
Exit status is 0 for no conflicts, 1 for some conflicts, 2 for trouble. IDENTIFICATION
Author: Walter F. Tichy. Manual Page Revision: ; Release Date: . Copyright (C) 1982, 1988, 1989 Walter F. Tichy. Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995 Paul Eggert. SEE ALSO
diff3(1), diff(1), rcsmerge(1), co(1). BUGS
It normally does not make sense to merge binary files as if they were text, but merge tries to do it anyway. GNU MERGE(1)
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