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Full Discussion: awk to print matching lines in files that meet critera
Top Forums Shell Programming and Scripting awk to print matching lines in files that meet critera Post 302981564 by shamrock on Wednesday 14th of September 2016 03:31:08 PM
Old 09-14-2016
Quote:
Originally Posted by Don Cragun
That will work on some systems, but the standards don't specify the precedence of file redirection operations and comparison operations. Some versions of awk parse the command:
Code:
getline < "f1" > 0

as:
Code:
getline < ("f1" > 0)

and others parse it as:
Code:
(getline < "f1") > 0

The left and right arrow operators have the same precedence but associate left to right so getline < "f1" > 0 has an implied parenthesization of ((getline < "f1") > 0)
I am surprised to know that there are awk(s) out there that do not comply with this rule of precedence and associativity as it predates the the very first and original awk!!!
 

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LEARN ABOUT DEBIAN

pclock

PCLOCK(1)						      General Commands Manual							 PCLOCK(1)

NAME

       pclock - pixmap clock

SYNOPSIS

       pclock [options]

DESCRIPTION

       This  manual  page  documents  briefly  the pclock command.  This manual page was written for the Debian GNU/Linux distribution because the
       original program does not have a manual page.

       pclock is a program that places a small analog clock program on the desktop of X.  It was designed to run under the WindowMaker window man-
       ager.  It uses any 64x64 pixmap as a background.

OPTIONS

       The programs follow the usual GNU command line syntax, with long options starting with two dashes (`-') and short optoins starting with one
       dash.  A summary of options is included below.

       -B PIXMAP, --background=PIXMAP
	      Use the given pixmap as the clock background (size must be 64x64).

       -H COLOR, --hands-color=COLOR
	      Draw the hands (hour, minute and second) in the specified color.

       -S COLOR, --second-hand-color
	      Draw the second hand in the specified color

       -h, --help
	      Show summary of options.

       --hour-hand-length=INT
	      Draw the hour hand with the specified length of INT.

       --minute-hand-length=INT
	      Draw the minute hand with the specified length of INT.

       --second-hand-length=INT
	      Draw the second hand with the specified length of INT.

       --second-hand-width=INT
	      Draw the minute hand with the specified width of INT.

       -s, --second-hand
	      Don't display the second hand.

       -v, --version
	      Show version of program.

       -w, --withdrawn
	      Don't start up in a withdrawn (iconic) state.

AUTHOR

       This manual page was written by Darren Benham <gecko@debian.org>, for the Debian GNU/Linux system (but may be used by others).	The  soft-
       ware is copyrighted (c) 1998 by and released under the GPL v2.

       Author: Alexander Kourakos <Alexander@Kourakos.com>
	  Web: http://www.kourakos.com/~awk/pclock/

																	 PCLOCK(1)
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