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Full Discussion: getopts question
Top Forums Shell Programming and Scripting getopts question Post 302209407 by chihung on Thursday 26th of June 2008 09:05:07 PM
Old 06-26-2008
Changes:
1. case "$option" - you did not reference the value of option variable, what you did was compare the string 'option'
2. if [ "$all" = "TRUE" ] - you need to provide space between $all, equal sign, and string "TRUE", it is best practice to quote the compare string. What you are doing is that you are assign variable (value of a) to be TRUE and it is always true inside the if statement. See "man test" for details.
3. + other minor changes


Modified version:
Code:
#!/bin/sh
all=FALSE

while getopts a: option > /dev/null 2>&1
do
   case "$option"
   in
     a) all="TRUE";;
     *) echo "...... "
         exit 1;;
    esac
done

if [ "$all" = "TRUE" ]
then
    echo "true"
else
    echo "false"
fi

 

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LEARN ABOUT PHP

variant_imp

VARIANT_IMP(3)								 1							    VARIANT_IMP(3)

variant_imp - Performs a bitwise implication on two variants

SYNOPSIS

       mixed variant_imp (mixed  $left, mixed  $right)

DESCRIPTION

	Performs a bitwise implication operation.

PARAMETERS

	      o $left
		- The left operand.

	      o $right
		- The right operand.

       Note

	       As  with  all  the variant arithmetic functions, the parameters for this function can be either a PHP native type (integer, string,
	      floating point, boolean or NULL), or an instance of a COM, VARIANT or DOTNET class. PHP native types will be converted  to  variants
	      using  the  same	rules  as  found  in  the constructor for the "VARIANT" class. COM and DOTNET objects will have the value of their
	      default property taken and used as the variant value.

	       The variant arithmetic functions are wrappers around the similarly named functions in the COM  library;	for  more  information	on
	      these  functions, consult the MSDN library. The PHP functions are named slightly differently; for example variant_add(3) in PHP cor-
	      responds to VarAdd()  in the MSDN documentation.

RETURN VALUES

       Variant Implication Table

       +------------+--------------------+---+
       |If $left is |			 |   |
       |	    |			 |   |
       |	    |	 If $right is	 |   |
       |	    |			 |   |
       |	    | then the result is |   |
       |	    |			 |   |
       +------------+--------------------+---+
       |	    |			 |   |
       |   TRUE     |			 |   |
       |	    |			 |   |
       |	    |			 |   |
       |	    |	     TRUE	 |   |
       |	    |			 |   |
       |	    |			 |   |
       |	    |	     TRUE	 |   |
       |	    |			 |   |
       |	    |			 |   |
       |   TRUE     |			 |   |
       |	    |			 |   |
       |	    |			 |   |
       |	    |	    FALSE	 |   |
       |	    |			 |   |
       |	    |			 |   |
       |	    |	     TRUE	 |   |
       |	    |			 |   |
       |	    |			 |   |
       |   TRUE     |			 |   |
       |	    |			 |   |
       |	    |			 |   |
       |	    |	     NULL	 |   |
       |	    |			 |   |
       |	    |			 |   |
       |	    |	     TRUE	 |   |
       |	    |			 |   |
       |	    |			 |   |
       |   FALSE    |			 |   |
       |	    |			 |   |
       |	    |			 |   |
       |	    |	     TRUE	 |   |
       |	    |			 |   |
       |	    |			 |   |
       |	    |	     TRUE	 |   |
       |	    |			 |   |
       |	    |			 |   |
       |   FALSE    |			 |   |
       |	    |			 |   |
       |	    |			 |   |
       |	    |	    FALSE	 |   |
       |	    |			 |   |
       |	    |			 |   |
       |	    |	     TRUE	 |   |
       |	    |			 |   |
       |	    |			 |   |
       |   FALSE    |			 |   |
       |	    |			 |   |
       |	    |			 |   |
       |	    |	     NULL	 |   |
       |	    |			 |   |
       |	    |			 |   |
       |	    |	     TRUE	 |   |
       |	    |			 |   |
       |	    |			 |   |
       |   NULL     |			 |   |
       |	    |			 |   |
       |	    |			 |   |
       |	    |	     TRUE	 |   |
       |	    |			 |   |
       |	    |			 |   |
       |	    |	     TRUE	 |   |
       |	    |			 |   |
       |	    |			 |   |
       |   NULL     |			 |   |
       |	    |			 |   |
       |	    |			 |   |
       |	    |	    FALSE	 |   |
       |	    |			 |   |
       |	    |			 |   |
       |	    |	     NULL	 |   |
       |	    |			 |   |
       |	    |			 |   |
       |   NULL     |			 |   |
       |	    |			 |   |
       |	    |			 |   |
       |	    |	     NULL	 |   |
       |	    |			 |   |
       |	    |			 |   |
       |	    |	     NULL	 |   |
       |	    |			 |   |
       +------------+--------------------+---+
PHP Documentation Group 													    VARIANT_IMP(3)
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