Pick up files to process using ls command Post: 302957729

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Top Forums Shell Programming and Scripting Pick up files to process using ls command Post 302957729 by bakunin on Wednesday 14th of October 2015 10:18:53 AM

10-14-2015

Registered User

Moderator's Comments:

Dear rac,

PLEASE: use CODE-tags to let code(-parts) and file content stand out from your text. It helps others to understand your problem better.

Furthermore, whatever your problem is, always provide three things:

1. an accurate problem description (this you did)

2. an accurate description of your system. "UNIX" is an OS with many, many flavours and running on a lot of (quite disparate) hardware. Your system might be quite different from mine in obvious or rather subtle ways. To help you better it helps to know your system because the one special quirk my system doesn't have yours might.

3. a description of what you have tried already and how it failed
it simply helps to find out what went wrong when one sees an error message like "file not found" or "disk full" or whatever. You may not have noticed it or not understood its importance (there are less obvious messages as my examples) but others may understand and others may notice.

Please keep that in mind and we will get along much better than now.

bakunin

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LEARN ABOUT OSX

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)