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Full Discussion: Grabbing value from command output and monitoring for changes
Top Forums Shell Programming and Scripting Grabbing value from command output and monitoring for changes Post 302447622 by monty77 on Monday 23rd of August 2010 09:38:17 PM
Old 08-23-2010
Quote:
Originally Posted by agama
Good -- a single shot command is much easier to deal with.

I miss read the grep -- realise now that you are ditching the 'name' line. If the value that you are interested in is always the last line, which it appears to be, then this will be better:

Code:
echo "psc -i 10050 -s RELOAD_SERVICE" | tmadmin | grep -vE 'Name|------' | tail -1| read new_value;

If there is more output following the value you want, but it is always line seven, then try this:
Code:
echo "psc -i 10050 -s RELOAD_SERVICE" | tmadmin | grep -vE 'Name|------' | awk 'NR==7 {print}' | read new_value;

Have a go with one of these and see if that works.
Thanks again, either one of those might work but I went with this in the end:

Code:
echo "psc -i 10050 -s RELOAD_SERVICE" | tmadmin | grep -vE 'Name|------|'^$'' | awk '{print $7}'

..only thing that's not perfect now is that it (understandably) will always write a row to the log when you first fire it up. Any way to avoid this?

Thanks a million!!
Monty
 

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LEARN ABOUT CENTOS

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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