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Full Discussion: Parsing a control file loop
Top Forums Shell Programming and Scripting Parsing a control file loop Post 303017207 by The Gamemaster on Thursday 10th of May 2018 11:48:20 PM
Old 05-11-2018
Parsing a control file loop
Hi,

Let's say I have a control file like this:

Code:
RHEL apple "echo apple"
RHEL bravo "ls -l bravo*"
RHEL church "chmod church.txt"

SUSE drive "chown user1 drive.txt"
SUSE eagle "echo "eagle flies""
SUSE feather "ls -l feather*"

HP-UX google "sed 's/^Google.*$/&\
ACTION: go to www.google.com/' google.txt"
HP-UX heartache "ls -l heartache.txt* | awk '{ print $9 }'"

...and so on.

In my main script, after I get the operating system of the machine I'm executing the script on and assigning it to variable $OPER_SYS, the script will read this control file. For every line with the value of $OPER_SYS, I want the command on the last column be executed.

Please take note of the carriage return on the first HP-UX line. It's intended, because I want the sed command to find the line starting with Google and add a new line after that with the text on the right hand side... and \n doesn't work in HP-UX sed for some reason (if you guys know a way to simplify that, please let me know).

Obviously, the script I'm creating will be executed on several servers with different platforms i.e. RHEL, SUSE, HP-UX, Solaris so I want the code to be executable on all of them (I'm having difficulties with HP-UX obviously).

Thanks in advance.
 

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LEARN ABOUT DEBIAN

ppmtosixel

ppmtosixel(1)						      General Commands Manual						     ppmtosixel(1)

NAME

       ppmtosixel - convert a portable pixmap into DEC sixel format

SYNOPSIS

       ppmtosixel [-raw] [-margin] [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as input.  Produces sixel commands (SIX) as output.	The output is formatted for color printing, e.g. for a DEC
       LJ250 color inkjet printer.

       If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled.  A printer control header and a color assignment table
       begin the SIX file.  Image data is written in a compressed format by default.  A printer control footer ends the image file.

OPTIONS

       -raw   If  specified,  each  pixel  will  be explicitly described in the image file.  If -raw is not specified, output will default to com-
	      pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands.  A raw file is often an order	of  magni-
	      tude larger than a compressed file and prints much slower.

       -margin
	      If  -margin  is not specified, the image will be start at the left margin (of the window, paper, or whatever).  If -margin is speci-
	      fied, a 1.5 inch left margin will offset the image.

PRINTING

       Generally, sixel files must reach the printer unfiltered.  Use the lpr -x option or cat filename > /dev/tty0?.

BUGS

       Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion.  If the original PPM maxval was
       greater	than  100,  rescaling  also reduces the image depth.  While the actual RGB values from the ppm file are more or less retained, the
       color palette of the LJ250 may not match the colors on your screen.  This seems to be a printer limitation.

SEE ALSO

       ppm(5)

AUTHOR

       Copyright (C) 1991 by Rick Vinci.

								   26 April 1991						     ppmtosixel(1)
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