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Full Discussion: Shell variable expansion in awk
Top Forums Shell Programming and Scripting Shell variable expansion in awk Post 302958816 by Corona688 on Monday 26th of October 2015 04:10:34 PM
Old 10-26-2015
It didn't expand because you gave awk the quoted string literal "stem", not the unquoted variable name stem.

awk sets FILENAME for your convenience, however, might be easier to use that.

Also, > is a little different in awk in that it keeps the file open. The only difference between > and >> is that the very first write of > will truncate the file, but >> never truncates at all.


Code:
awk 'FNR==1 { F=FILENAME ; sub(/_input[.]tab/, "", F); } { print $1"\n"$2 > F "_reads_R" (NR%2)+1 }' inputfile

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LEARN ABOUT REDHAT

tzselect

TZSELECT(8)						      System Manager's Manual						       TZSELECT(8)

NAME

       tzselect - select a time zone

SYNOPSIS

       tzselect

DESCRIPTION

       The  tzselect program asks the user for information about the current location, and outputs the resulting time zone description to standard
       output.	The output is suitable as a value for the TZ environment variable.

       All interaction with the user is done via standard input and standard error.

ENVIRONMENT VARIABLES

       AWK    Name of a Posix-compliant awk program (default: awk).

       TZDIR  Name of the directory containing time zone data files (default: /usr/local/etc/zoneinfo).

FILES

       TZDIR/iso3166.tab
	      Table of ISO 3166 2-letter country codes and country names.

       TZDIR/zone.tab
	      Table of country codes, latitude and longitude, TZ values, and descriptive comments.

       TZDIR/TZ
	      Time zone data file for time zone TZ.

EXIT STATUS

       The exit status is zero if a time zone was successfully obtained from the user, nonzero otherwise.

SEE ALSO

       newctime(3), tzfile(5), zdump(8), zic(8)

																       TZSELECT(8)
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