Extracting information using awk Post: 302797449

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Top Forums Shell Programming and Scripting Extracting information using awk Post 302797449 by Don Cragun on Monday 22nd of April 2013 02:59:49 PM

04-22-2013

Registered User

If you want the value converted to a number, you can try something like:

Code:

awk '
BEGIN { factor=1000     # change 1000 to 1024 if using ISO/IEC values
}
function f(v,   ind) {
        ind = index("KMGTPE", substr(v, length(v), 1))
        return(substr(v, 1, length(v) - 1) * (factor ^ ind))
}
{       printf("%s\n", $8 ~ /^[0-9]*[KMGTPE]$/ ? f($8) : $8)
}' input.txt

As always, if you're using a Solaris/SunOS system, use /usr/xpg4/bin/awk, /usr/xpg6/bin/awk, or nawk instead of awk.

I left off the multipliers for zettabyte (Z) and yottabyte (Y) because the floating point types usually used by awk implementations don't have enough precision to compute the correct value in those ranges. If a multiplier given in the input is not known, it is printed unchanged. With the input file:

Code:

Mem: 100M Active, 2150K Cache, 500M Buf, 990 Free
Mem: 100M Active, 2150K Cache, 500M Buf, 991K Free
Mem: 100M Active, 2150K Cache, 500M Buf, 992M Free
Mem: 100M Active, 2150K Cache, 500M Buf, 993G Free
Mem: 100M Active, 2150K Cache, 500M Buf, 994T Free
Mem: 100M Active, 2150K Cache, 500M Buf, 995P Free
Mem: 100M Active, 2150K Cache, 500M Buf, 996E Free
Mem: 100M Active, 2150K Cache, 500M Buf, 997Z Free
Mem: 100M Active, 2150K Cache, 500M Buf, 998Y Free
Mem: 100M Active, 2150K Cache, 500M Buf, 999u Free

the above script produces the following output:

Code:

990
991000
992000000
993000000000
994000000000000
995000000000000000
996000000000000000000
997Z
998Y
999u

This User Gave Thanks to Don Cragun For This Post:

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LEARN ABOUT DEBIAN

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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igawk