02-02-2015
The first file is stocking in memory (array P,Q and C in code)
Only lines sample number parent of the second file is stocking in memory (Array V in code) and so, only these lines must be at begin of the second file.
If you launch only the awk commande before pipe, you see it return only lines of second file that represent parents.
EDIT: each children pair in second file must be consecutive.
Last edited by disedorgue; 02-02-2015 at 07:49 PM..
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fmt(1) User Commands fmt(1)
NAME
fmt - simple text formatters
SYNOPSIS
fmt [-cs] [-w width | -width] [inputfile...]
DESCRIPTION
fmt is a simple text formatter that fills and joins lines to produce output lines of (up to) the number of characters specified in the -w
width option. The default width is 72. fmt concatenates the inputfiles listed as arguments. If none are given, fmt formats text from the
standard input.
Blank lines are preserved in the output, as is the spacing between words. fmt does not fill nor split lines beginning with a `.' (dot), for
compatibility with
nroff(1). Nor does it fill or split a set of contiguous non-blank lines which is determined to be a mail header, the first line of which
must begin with "From".
Indentation is preserved in the output, and input lines with differing indentation are not joined (unless -c is used).
fmt can also be used as an in-line text filter for vi(1). The vi command:
!}fmt
reformats the text between the cursor location and the end of the paragraph.
OPTIONS
-c Crown margin mode. Preserve the indentation of the first two lines within a paragraph, and align the left margin of
each subsequent line with that of the second line. This is useful for tagged paragraphs.
-s Split lines only. Do not join short lines to form longer ones. This prevents sample lines of code, and other such
formatted text, from being unduly combined.
-w width | -width Fill output lines to up to width columns.
OPERANDS
inputfile Input file.
ENVIRONMENT VARIABLES
See environ(5) for a description of the LC_CTYPE environment variable that affects the execution of fmt.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO
nroff(1), vi(1), attributes(5), environ(5)
NOTES
The -width option is acceptable for BSD compatibility, but it may go away in future releases.
SunOS 5.10 9 May 1997 fmt(1)