Using quotes in awk Post: 302976172

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Top Forums Shell Programming and Scripting Using quotes in awk Post 302976172 by Don Cragun on Friday 24th of June 2016 01:59:30 PM

06-24-2016

Registered User

It is not restricted to AIX. The standards explicitly state that the input Record Separator is the 1st character or the string assigned to RS and the results are unspecified if the string assigned to RS contains more than one character. Some implementations of awk allow using an ERE in RS (which is required by the standards for FS, but not for RS). The behavior you are seeing on AIX is common for most implementations of awk on UNIX and BSD systems. Most, if not all, Linux systems support the extension that allows RS to be set to an ERE.

With a standards-conforming awk:

Code:

awk '
c == 0 {
	f1 = $0
	c = 1
	next
}
c == 1 {
	print f1 $0
	c = 2
}
NF == 0 {
	c = 0
}' file1

should do what you want.

If someone wants to try this on a Solaris/SunOS system, change awk to /usr/xpg4/bin/awk or nawk.

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LEARN ABOUT CENTOS

igawk

IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME

       igawk - gawk with include files

SYNOPSIS

       igawk [ all gawk options ] -f program-file [ -- ] file ...
       igawk [ all gawk options ] [ -- ] program-text file ...

DESCRIPTION

       Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).

       AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like

	      @include getopt.awk

       in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.

OPTIONS

       See gawk(1) for a full description of the AWK language and the options that gawk supports.

EXAMPLES

       cat << EOF > test.awk
       @include getopt.awk

       BEGIN {
	    while (getopt(ARGC, ARGV, "am:q") != -1)
		 ...
       }
       EOF

       igawk -f test.awk

SEE ALSO

       gawk(1)

       Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.

AUTHOR

       Arnold Robbins (arnold@skeeve.com).

Free Software Foundation					    Nov 3 1999								  IGAWK(1)

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