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awk and basename

 
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# 1  
Old 11-23-2011
awk and basename
im trying to extract the basename of a process running on a host
processx is running at host1 as /applications/myapps/bin/processx

i wanted to check if its running, then extract the basename only using:
Code:
$ ssh host1 "ps aux | grep -v 'grep' | grep 'processx'" | awk '{ print basename $11}'

unfortunately is still get the whole path+filename (ie /applications/myapps/bin/processx)
is basename not supposed to run in awk?

thanks!
# 2  
Old 11-23-2011
Use a substitute command to replace all characters from the beginning of the string to right most slash, then print it:

Code:
awk '{ print gensub( ".*/", "", $11 );  }'

---------- Post updated at 23:50 ---------- Previous update was at 23:45 ----------

You can also eliminate the grep -v if you use this syntax:

Code:
grep '[p]rocessx'

It will match processx, but won't match grep [p]rocessx which will appear in the ps listing.

Code:
ssh host1 "ps aux | grep '[p]rocessx'"  | awk ...

This User Gave Thanks to agama For This Post:
kaboink
# 3  
Old 11-23-2011
Quote:
Originally Posted by agama
Code:
ssh host1 "ps aux | grep '[p]rocessx'"  | awk ...

this is a neat trick.. thanks!

Quote:
Originally Posted by agama
Use a substitute command to replace all characters from the beginning of the string to right most slash, then print it:

Code:
awk '{ print gensub( ".*/", "", $11 );  }'

now back to my problem. the above works, but not in what i'm trying to do. let me clarify...

Code:
ssh_cmd = "ssh $host "ps aux | grep -v 'grep' | grep '$process'" | awk '{ if ($11 == "$process") print $9; }'" ;

where "$process" is any user input process
code is supposed to check if $process is running. however, if said process is run with path, it is fooled to believe that it's not.
# 4  
Old 11-23-2011
Like this?
Code:
ssh_cmd="ssh $host \" ps aux | grep -v grep | grep $process | awk -F/ '{print $NF}' \" ";

--ahamed
# 5  
Old 11-23-2011
Quote:
Originally Posted by ahamed101
Like this?
Code:
ssh_cmd="ssh $host \" ps aux | grep -v grep | grep $process | awk -F/ '{print $NF}' \" ";

--ahamed
ahamed you must escape with a backslash for pass to awk that as a paramater
Code:
{print \$NF}

and my way
Code:
ssh_cmd="ssh $host ps aux|awk '{if(\$11==\"$process\") print \$9}'"

regards
ygemici
# 6  
Old 11-23-2011
Quote:
Originally Posted by ygemici
Code:
ssh_cmd="ssh $host ps aux|awk '{if(\$11==\"$process\") print \$9}'"

i
I believe that the user will be entering foo and $11 may contain /path/to/foo which needs to be 'basenamed' before comparing. A slight change:

Code:
ssh_cmd="ssh $host ps aux|awk '{if( gensub( \".*/\", \"\", \$11 ) == \"$process\") print \$9}'"

# 7  
Old 11-23-2011
confused here a bit. I'm not grepping the $process anymore before I awk?
that could mean the script would check all process output of ps aux right?
 
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