Help with cmd while using ps Post: 302947605

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Top Forums Shell Programming and Scripting Help with cmd while using ps Post 302947605 by bakunin on Friday 19th of June 2015 11:46:07 AM

06-19-2015

Registered User

Quote:

Originally Posted by Jojo90

Code:

ps -e -o pid,uname,cmd

how can i split and take only the cmd part from it.

You can of course specifiy only the "cmd"-part in the option-string of ps like Aia has already suggested. If you need all three values you can split these in the shell:

Code:

ps -e -o pid,uname,cmd |\
while read PID UNAME CMD ; do
     print - "PID=$PID , user=$UNAME , command=$CMD"
done

If you use a read command to fill several variables (three in this case) the input to fill them (one line from the output of ps) will be split along word boundaries, so the first "word" goes to the first variable, the second word to the second variable. If there are more "words" in the output than there are variables the last variable gets the whole rest of the line.

So, this works because the first two values are always single "words" (character groups surrounded by blanks), only the last one isn't. It would not work if there would be several multi-word values involved.

I hope this helps.

bakunin

bakunin

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paps

PAPS(1) 						      General Commands Manual							   PAPS(1)

NAME

       paps - UTF-8 to PostScript converter using Pango

SYNOPSIS

       paps [options] files...

DESCRIPTION

       paps reads a UTF-8 encoded file and generates a PostScript language rendering of the file. The rendering is done by creating outline curves
       through the pango ft2 backend.

OPTIONS

       These programs follow the usual GNU command line syntax, with long options starting with  two  dashes  (`-').   A  summary  of  options	is
       included below.

       --landscape
	      Landscape output. Default is portrait.

       --columns=cl
	      Number of columns output. Default is 1.

       --font=desc
	      Set the font description. Default is Monospace 12.

       --rtl  Do rtl layout.

       --paper ps
	      Choose paper size. Known paper sizes are legal, letter, a4. Default is A4.

       --bottom-margin=bm
	      Set bottom margin in postscript points (1/72 inch). Default is 36.

       --top-margin=tm
	      Set top margin. Default is 36.

       --left-margin=lm
	      Set left margin. Default is 36.

       --right-margin=rm
	      Set right margin. Default is 36.

       --help Show summary of options.

       --header
	      Draw page header for each page.

       --markup
	      Interpret the text as pango markup.

       --encoding=ENCODING
	      Assume the documentation encoding is ENCODING.

       --lpi  Set the lines per inch. This determines the line spacing.

       --cpi  Set the characters per inch. This is an alternative method of specifying the font size.

       --stretch-chars
	      Indicates  that  characters  should be stretched in the y-direction to fill up their vertical space. This is similar to the texttops
	      behaviour.

AUTHOR

       paps was written by Dov Grobgeld <dov.grobgeld@gmail.com>.

       This manual page was written by Lior Kaplan <kaplan@debian.org>, for the Debian project (but may be used by others).

								  April  17, 2006							   PAPS(1)

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