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Full Discussion: Using grep with test and without using [[ ]]
Top Forums Shell Programming and Scripting Using grep with test and without using [[ ]] Post 303029166 by Xubuntu56 on Tuesday 22nd of January 2019 04:21:20 PM
Old 01-22-2019
Using grep with test and without using [[ ]]
As an exercise, I'm trying to re-write this code without the compound square brackets, using grep and test. Need to know what to do about the "equal-tilde".
Code:
#!/bin/bash
# test-integer2: evaluate the value of an integer.
INT=-5
if [[ "$INT" =~ ^-?[0-9]+$ ]]; then
if [ "$INT" -eq 0 ]; then
echo "INT is zero."
else
if [ "$INT" -lt 0 ]; then
echo "INT is negative."
else
echo "INT is positive."
fi

 

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ROBOCUT(1)							   User Commands							ROBOCUT(1)

NAME

       Robocut - is used with cutting plotters.

DESCRIPTION

       The  `Robocut'  program	plots  or cuts SVG files on a Craft Robo or Silhouette SD or most likely any other customer grade Graphtec cutting
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   Usage:
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   Help Options:
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	      Show version information and copyright details.

       --show Show all the parameters entered and the defaults.

   Application Options:
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	      Stop sort the objects from the SVG before plotting.

       -t, --bb-sort
	      Sort the objects by bounding box, good for letters.  This will cut out the inside first and than the outside.

       --cut  Shows the cutting dialogue after start.

       --media INT
	      Select the media. See drop down box.

       -g, --speed INT
	      The speed between 1 and 33.

       -p, --pressure INT
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   Registration Mark Options:
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       -a, --reg-dimension-width DOUBLE
	      Specify the length in mm between the the two horizontal marks.

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	      Specify the length in mm between the the two vertical marks.

       -c, --reg-origin-width DOUBLE
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   Device Options:
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	      Try this program with other usb hardware on your own risk. You need to convert hex to dec.

       --usb-product-id INT
	      May also work with other hardware, try usb-devices program to scan your computer.

ENVIRONMENT

       QT SVG only supports the SVG 1.2 Tiny standard and this has a limited SVG support. For example multiline text is something that is no  sup-
       ported by Robocut, however you can export your text to a path or just create each line separate.

AUTHOR

       Written by Tim Hutt and Markus Schulz <schulz@alpharesearch.de>

REPORTING BUGS

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COPYRIGHT

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       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
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Robocut V1.0.8							    August 2011 							ROBOCUT(1)
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