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Full Discussion: If Condition in awk
Top Forums Shell Programming and Scripting If Condition in awk Post 302972250 by RudiC on Tuesday 3rd of May 2016 10:45:41 AM
Old 05-03-2016
awk can't determine empty fields with the default field separator. So make sure to find to use a reasonable one. With e.g. <TAB> as an FS, try
Code:
awk '{$5=$5?$5:$4; $4=$2-$5}1' FS="\t" OFS="\t" file
1	700	1200	300	400	1300
2	2000	1000	500	1500	600
3	1400	200	400	1000	1200
4	1300	500	700	600	200

This User Gave Thanks to RudiC For This Post:
 

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METASYS(8)							    NUT Manual								METASYS(8)

NAME
metasys - Driver for Meta System UPS equipment NOTE
This man page only documents the hardware-specific features of the metasys driver. For information about the core driver, see nutupsdrv(8). SUPPORTED HARDWARE
The metasys driver was written with the "Meta System UPS Protocol Rev.1.12" kindly supplied from Meta System. The driver should support all the common features of the ups models: o HF Line (/2) 1-8 boards o HF Millennium (810, 820) o HF TOP Line (910, 920, 930, 940, 950, 970, 980) o ECO Network (750, 1000, 1050, 1500, 1800, 2000, 2100, 2500, 3000) o ECO (305, 308, 311, 511, 516, 519, 522, SX, SXI) o ally HF (800, 1000, 1250, 1600, 2000, 2500) o Megaline (1250, 2500, 3750, 5000, 6250, 7500, 8750, 10000) CABLING
The needed cable is a standard pin-to-pin serial cable with at least pins 2, 3, and 5 (on DB9 connector) connected. EXTRA ARGUMENTS
This driver supports no extra arguments from ups.conf(5). BUGS
This driver has been tested on Meta System HF Millennium 820 and ally HF 1000 only. Any information about the use of the driver with the other listed UPS are really welcome. AUTHOR
Fabio Di Niro <blaxwan@users.sourceforge.net> SEE ALSO
The core driver: nutupsdrv(8) Internet resources: The NUT (Network UPS Tools) home page: http://www.networkupstools.org/ Network UPS Tools 05/21/2012 METASYS(8)
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