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Full Discussion: Help with xargs
Top Forums Shell Programming and Scripting Help with xargs Post 302781199 by Corona688 on Friday 15th of March 2013 05:09:27 PM
Old 03-15-2013
Apparently catalina has its port as string 2 here, but most things won't. If you want something that works for catalina, great.

Here's a tip: Instead of doing 'grep -v grep', just make it so grep doesn't match itself in the first place by making one letter [c] instead of c -- matches the same string but doesn't match itself.

Also, whenever you're doing grep | grep | awk | kitchen | sink, you should just replace it all with one simple awk command.

Code:
#!/bin/sh

set -- `ps -aux | awk '/[c]atalina/ { print $2 }'` # $1=PID1, $2=PID2, etc
IFS="|" # Make $* be PID1|PID2|PID3 instead of PID1 PID2 PID3
netstat -nlp | egrep "($*)/" # egreps for "(PID1|PID2)/"

This User Gave Thanks to Corona688 For This Post:
axiopisty
 

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LEARN ABOUT LINUX

zegrep

ZGREP(1)                                                      General Commands Manual                                                     ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep  options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

                                                                                                                                          ZGREP(1)
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