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Full Discussion: Replacement of variable by their content in a file
Top Forums Shell Programming and Scripting Replacement of variable by their content in a file Post 302985107 by Scrutinizer on Saturday 5th of November 2016 03:29:54 AM
Old 11-05-2016
You are using eval on the contents of an input which may not only creates a potential security risk, it also does not really make sense here since it interprets its arguments as shell commands and in this case the arguments are the result of [ICODE]echo $line[/ICODE], which read from [ICODE]dae2.txt[/ICODE].

And the content of [ICODE]dae2.txt[/ICODE] clearly does not contain shell commands...


To just get the content of a file into a variable, you could consider this (since you are using bash):
Code:
tgtfile=$(<"${srcfile}")

a more general alternative would be:
Code:
tgtfile=$(cat "${srcfile}")

Last edited by Scrutinizer; 11-05-2016 at 05:28 AM.. Reason: Crossed out wrong remarks, because I did not have my brain switched on
This User Gave Thanks to Scrutinizer For This Post:
dae
 

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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)
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