Has AudioScope found a bug in bash 4.4.5? Post: 302998143

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Top Forums UNIX for Advanced & Expert Users Has AudioScope found a bug in bash 4.4.5? Post 302998143 by wisecracker on Friday 26th of May 2017 04:56:55 AM

05-26-2017

Registered User

(On holiday at the moment so a limited reply.)
Well what should have happened until bash version 4.4.5 and what actully happens is not the same.

Code:

#!/bin/bash
bash --version
uname -a
status=0
KEYBOARD()
{
	read -r -p "Enter QUIT or EXIT to quit:- " kbinput
	if [ "$kbinput" == "QUIT" ] || [ "$kbinput" == "EXIT" ]
	then
		status=255
		break
	fi
	if [ "$kbinput" == "TEST" ]
	then
		echo "Hello World!"
	fi
}
while true
do
	echo "This will loop and hold until keyboard input is quitted."
	KEYBOARD
done
echo "You are here..."
echo "Status = $status..."

Resukts:-

Code:

Last login: Fri May 26 09:45:32 on ttys000
AMIGA:barrywalker~> chmos 755 test.sh
-bash: chmos: command not found
AMIGA:barrywalker~> chmod 755 test.sh
AMIGA:barrywalker~> ./test.sh
GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin16)
Copyright (C) 2007 Free Software Foundation, Inc.
Darwin Patricias-iMac.local 16.6.0 Darwin Kernel Version 16.6.0: Fri Apr 14 16:21:16 PDT 2017; root:xnu-3789.60.24~6/RELEASE_X86_64 x86_64
This will loop and hold until keyboard input is quitted.
Enter QUIT or EXIT to quit:- TEST
Hello World!
This will loop and hold until keyboard input is quitted.
Enter QUIT or EXIT to quit:- EXIT
You are here...
Status = 255...
AMIGA:barrywalker~> _

This is the same on bash version 4.3.42.
The status is/was exactly as I want it except I have changed the code now whilst away on a break!
Will be home again soon and get back to you fully...

wisecracker

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LEARN ABOUT OPENSOLARIS

libbash

LIBBASH(7)							  libbash Manual							LIBBASH(7)

NAME

     libbash -- A bash shared libraries package.

DESCRIPTION

     libbash  is  a package that enables bash dynamic-like shared libraries. Actually its a tool for managing bash scripts whose functions you may
     want to load and use in scripts of your own.

     It contains a 'dynamic loader' for the shared libraries ( ldbash(1)), a configuration tool (ldbashconfig(8)), and some libraries.

     Using ldbash(1) you are able to load loadable bash libraries, such as getopts(1) and hashstash(1).  A bash shared library that can be  loaded
     using
     ldbash(1) must answer 4 requirments:

     1.     It must be installed in $LIBBASH_PREFIX/lib/bash (default is /usr/lib/bash).

     2.     It must contain a line that begins with '#EXPORT='.  That line will contain (after the '=') a list of functions that the library
	    exports.  I.e. all the function that will be usable after loading that library will be listed in that line.

     3.     It must contain a line that begins with '#REQUIRE='.  That line will contain (after the '=') a list of bash libraries that are
	    required for our library.  I.e. every bash library that is in use in our bash library must be listed there.

     4.     The library must be listed (For more information, see ldbashconfig(8)).

   Basic guidelines for writing library of your own:
     1.     Be aware, that your library will be actually sourced. So, basically, it should contain (i.e define) only functions.

     2.     Try to declare all variables intended for internal use as local.

     3.     Global variables and functions that are intended for internal use (i.e are not defined in '#EXPORT=') should begin with:
		  __<library_name>_
	    For example, internal function myfoosort of hashstash library should be named as
		  __hashstash_myfoosort
	    This helps to avoid conflicts in global name space when using libraries that come from different vendors.

     4.     See html manual for full version of this guide.

AUTHORS

     Hai Zaar <haizaar@haizaar.com>
     Gil Ran <ril@ran4.net>

SEE ALSO

     ldbash(1), ldbashconfig(8), getopts(1), hashstash(1) colors(1) messages(1) urlcoding(1) locks(1)

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