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Full Discussion: Why awk perform differently when using variable?
Top Forums Shell Programming and Scripting Why awk perform differently when using variable? Post 302932331 by ken6503 on Tuesday 20th of January 2015 08:15:42 PM
Old 01-20-2015
Why awk perform differently when using variable?
Hi Gurus,

I hit a hard block in my script.
when using awk command with variable, I got different result.
Please see below:
my test file as below:
Code:
$ cat demofile.txt
filename-yyyy-abcd
filename-xxx-week-pass
filename-xxx-week-run

for testing purpose, I put 3 awk command in one script.
Code:
$cat vartest.ksh
#!/bin/ksh

var=abcd
awk  '$0~/a/{print "ac", $0}!$0~/a/{print "su" ,$0}' a="$var" demofile.txt

echo "using -v "
/usr/xpg4/bin/awk -v a=$var '$0~/a/{print "ac", $0}!$0~/a/{print "su" ,$0}'  demofile.txt

echo "without variable"
awk  '$0~/abcd/{print "ac", $0}!$0~/abcd/{print "su" ,$0}' demofile.txt

the output as below:
Code:
$./vartest.ksh
ac filename-yyyy-abcd
ac filename-xxx-week-pass
ac filename-xxx-week-run
using -v
ac filename-yyyy-abcd
ac filename-xxx-week-pass
ac filename-xxx-week-run
without variable
ac filename-yyyy-abcd
su filename-xxx-week-pass
su filename-xxx-week-run

only 3rd command give me correct result.
my server is
Code:
uname -a
SunOS  5.10 Generic_150400-04 sun4v sparc sun4v

Thanks in advance.
 

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LEARN ABOUT ULTRIX

face

face(1) 							   User Commands							   face(1)

NAME

       face - executable for the Framed Access Command Environment Interface

SYNOPSIS

       face [-i init_file] [-c command_file] [-a alias_file] [filename...]

DESCRIPTION

       The  Framed  Access  Command  Environment Interface (FACE) presents your files and file folders on the screen through a system of menus and
       forms if you are properly set up as a FACE user.

       filename must follow the naming convention Menu.xxx for a menu, Form.xxx for a form, and Text.xxx for a text file, where xxx is any  string
       that  conforms  to  the	UNIX   system  file  naming conventions. The Form and Menu Language Interpreter (FMLI) descriptor lifetime will be
       ignored for all frames opened by argument to face. These frames have a lifetime of immortal by default. If filename is not specified on the
       command line, the  FACE Menu will be opened along with those objects specified by the
	LOGINWIN environment variables. These variables are found in the user's .environ file.

OPTIONS

       The following options are supported:

       -a alias_file	       Alias file

       -c command_file	       Command file

       -i init_file	       Initial file

OPERANDS

       The following operand is supported:

       filename        The full pathname of the file describing the object to be opened initially.

EXIT STATUS

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FILES

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ATTRIBUTES

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SEE ALSO

       env(1), attributes(5)

SunOS 5.10							    5 Jul 1990								   face(1)
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