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Full Discussion: Beginner: script headache
Top Forums Shell Programming and Scripting Beginner: script headache Post 302983287 by Don Cragun on Sunday 9th of October 2016 10:16:23 PM
Old 10-09-2016
You are having a problem with the precedence of operators. In that expression, the AND operator has higher precedence than the OR operator, so the expression in your if statement is evaluated as though you had written:
Code:
if [[ $a == "A" || ( $a == "a" && $b == "B" ) || $b == "b" ]]

To get what I think you were trying to do, you want something more like:
Code:
#!/bin/sh
a=$1
b=$2

if [[ ( $a == "A" || $a == "a" ) && ( $b == "B" || $b == "b" ) ]]
then
        echo "Conditions are met"
else
        echo "Conditions are not met"
fi

 

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COLORS(3)						   libbash colors Library Manual						 COLORS(3)

NAME
colors -- libbash library for setting tty colors. SYNOPSIS
colorSet <color> colorReset colorPrint [<indent>] <color> <text> colorPrintN [<indent>] <color> <text> DESCRIPTION
General colors is a collection of functions that make it very easy to put colored text on tty. The function list: colorSet Sets the color of the prints to the tty to COLOR colorReset Resets current tty color back to normal colorPrint Prints TEXT in the color COLOR indented by INDENT (without adding a newline) colorPrintN The same as colorPrint, but trailing newline is added Detailed interface description follows. Available colors: Green Red Yellow White The color parameter is non-case-sensitive (i.e. RED, red, ReD, and all the other forms are valid and are the same as Red). FUNCTIONS DESCRIPTIONS
colorSet <color> Sets the current printing color to color. colorReset Resets current tty color back to normal. colorPrint [<indent>] <color> Prints text using the color color indented by indent (without adding a newline). Parameters: <indent> The column to move to before start printing. This parameter is optional. If ommitted - start output from current cursor position. <color> The color to use. <color> The text to print. colorPrintN [<indent>] <color> The same as colorPrint, except a trailing newline is added. EXAMPLES
Printing a green 'Hello World' with a newline: Using colorSet: $ colorSet green $ echo 'Hello World' $ colorReset Using colorPrint: $ colorPrint 'Hello World'; echo Using colorPrintN: $ colorPrintN 'Hello World' AUTHORS
Hai Zaar <haizaar@haizaar.com> Gil Ran <gil@ran4.net> SEE ALSO
ldbash(1), libbash(1) Linux Epoch Linux
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