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Full Discussion: Only matching each different pattern once
Top Forums Shell Programming and Scripting Only matching each different pattern once Post 302262806 by fiori_musicali on Saturday 29th of November 2008 01:47:16 AM
Old 11-29-2008
Only matching each different pattern once
I have the following snippet of script:

Code:
for i in `ps axuc | awk '{ print $11 }' | grep -c 1 awk '{ print $1 }'` ; do
        ps axuc | grep $i | awk '{ do { x+=1 ; y+=$4 } while ( x < NR )} END { print y }'
done

The idea is to:

a) print the process list
b) grab the last field ($11 == command name)
c) execute addition for CPU utilization ($4 = %cpu key of ps) for each command name separately
d) print the result of addition

However, as there are many processes started with the same name (eg. httpd), it performs the addition redundantly for each instance. I presume the solution would be to modify the for-loop's preceding statement (assigning the field 11 of the output of ps to $i) to exclude the repeated occurences from being assigned to $i.

I guess the problem is rather simple, but I can't figure it out.

I tried the following:

Code:
for i in `ps axuc | awk '{ print $11 }' | grep -c 1 `ps axuc | awk '{ print $11 }'`` ; do [...]

First of all, of course; that is ridiculous. Second, it doesn't work:

syntax error: `|' unexpected

Anyone have any tips??
 

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LEARN ABOUT OSX

ptargrep

PTARGREP(1)						 Perl Programmers Reference Guide					       PTARGREP(1)

NAME

       ptargrep - Apply pattern matching to the contents of files in a tar archive

SYNOPSIS

	 ptargrep [options] <pattern> <tar file> ...

	 Options:

	  --basename|-b     ignore directory paths from archive
	  --ignore-case|-i  do case-insensitive pattern matching
	  --list-only|-l    list matching filenames rather than extracting matches
	  --verbose|-v	    write debugging message to STDERR
	  --help|-?	    detailed help message

DESCRIPTION

       This utility allows you to apply pattern matching to the contents of files contained in a tar archive.  You might use this to identify all
       files in an archive which contain lines matching the specified pattern and either print out the pathnames or extract the files.

       The pattern will be used as a Perl regular expression (as opposed to a simple grep regex).

       Multiple tar archive filenames can be specified - they will each be processed in turn.

OPTIONS

       --basename (alias -b)
	   When matching files are extracted, ignore the directory path from the archive and write to the current directory using the basename of
	   the file from the archive.  Beware: if two matching files in the archive have the same basename, the second file extracted will
	   overwrite the first.

       --ignore-case (alias -i)
	   Make pattern matching case-insensitive.

       --list-only (alias -l)
	   Print the pathname of each matching file from the archive to STDOUT.  Without this option, the default behaviour is to extract each
	   matching file.

       --verbose (alias -v)
	   Log debugging info to STDERR.

       --help (alias -?)
	   Display this documentation.

COPYRIGHT

       Copyright 2010 Grant McLean <grantm@cpan.org>

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.16.2							    2013-08-25							       PTARGREP(1)
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