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Full Discussion: Can't figure out what field separator to use in awk....
Top Forums UNIX for Dummies Questions & Answers Can't figure out what field separator to use in awk.... Post 302324066 by thom.mattson on Tuesday 9th of June 2009 08:34:45 PM
Old 06-09-2009
Can't figure out what field separator to use in awk....
Hi Friends,

Scripting newb here. So I'm trying to create a geektool script that uses awk and printf to output certain fields from top (namely command, cpu%, rsize, pid and time, in that order).

Here's the input from the top process that I'm putting into awk:

Code:
  PID COMMAND      %CPU   TIME   #TH #PRTS #MREGS RPRVT  RSHRD  RSIZE  VSIZE
66110 GeekTool    11.7%  3:16:32  73   923-     0     0-     0-   55M  1006M 
31858 firefox-bi   5.8% 52:15.57  18   227      0     0-     0-  320M  1273M 
87943 perl         3.7%  0:00.25   1    13      0     0-     0- 5368K   589M 
87902 perl         3.5%  0:00.31   1    14+     0     0-     0- 7104K   590M 
87942 perl         3.0%  0:00.24   1    13      0     0-     0- 5368K   589M 
87941 perl         2.9%  0:00.23   1    13      0     0-     0- 5368K   589M 
   63 coreservic   2.6% 15:55.41   2   243+     0     0-     0-   18M   645M 
66070 WindowServ   2.0% 27:07.05   6   387+     0     0-     0-   84M  1015M 
    0 kernel_tas   1.6% 24:31.65  62     2      0     0-     0   157M  1122M 
   15 distnoted    1.2%  8:31.58   1    66+     0     0-     0-  852K   586M 
66106 Last.fm      0.8%  7:25.17  10   167      0     0-     0-   27M   993M 
87946 top          0.7%  0:00.14   1    32+     0     0-     0- 1016K   586M 
87551 Terminal     0.7%  0:00.42   5   107      0     0-     0- 9532K   927M 
87930 top          0.5%  0:00.19   1    17+     0     0-     0- 1020K   587M 
   11 DirectoryS   0.5%  3:38.61   5    84      0     0-     0- 3380K   589M 
66163 System Eve   0.4%  2:18.47   2    86+     0     0-     0- 6452K   901M

As you can see, the last process listed is two words (System Eve), therefore with the default field separator awk sees System as field $2 and Eve as field $3, and thus outputs them to different columns, much to my dismay. For the life of me I can't figure out what the appropriate field separator should be given the way the input is broken up; everything I have tried has failed miserably.

Here's my script so far:
Code:
top -FR -l2 -ocpu | grep -v ' 0.0% ..:' | awk '{printf( "%-12s %-5s %-5s %-5s %s\n", $2,$3,$10,$1,$4 ) }' | sed -n '15,$p'

And here's an example of the current (wrong) output:

Code:
COMMAND      %CPU  RSIZE PID   TIME
GoogleDesk   0.5%  59M   57    10:49.81
System       Eve   0-    66163 0.4%
Terminal     0.4%  9428K 8158  0:00.34

Any help would be greatly appreciated.

Thanks,

Thom
 

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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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