Has AudioScope found a bug in bash 4.4.5? Post: 302998200

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Top Forums UNIX for Advanced & Expert Users Has AudioScope found a bug in bash 4.4.5? Post 302998200 by wisecracker on Saturday 27th of May 2017 05:35:57 AM

05-27-2017

Registered User

Hi Corona688.

Still on a break with limited internet access but my 'ways are now changed'... ;o)
Well using the return method suits me fine.

I had no idea that this bug was near decades old and I was _exploiting_ it.
Thanks for pointing me in the right direction.

Here is a slightly simplified version of yours using dash as the prime mover.
OSX 10.12.5, default bash terminal calling 'dash' from the script...
I still get my variables where I want them so I am a happy bunny...

Code:

Last login: Sat May 27 10:20:46 on ttys000
AMIGA:amiga~> cd Desktop/Code/Shell
AMIGA:amiga~/Desktop/Code/Shell> cat kb_loop2.sh
#!/usr/local/bin/dash
# This passes the ShellCheck test as /bin/sh.
TEXT="Thank you Corona688."
status=0
KEYBOARD()
{
	printf "Enter QUIT to quit:- "
	read -r kbinput
	if [ "$kbinput" = "QUIT" ]
	then
		TEXT="YOU ARE HERE!"
		status=255
		echo "Exiting the KEYBOARD() function..."
                return 1
	elif [ "$kbinput" = "TEST" ]
	then
		echo "Hello World!"
	fi
        return 0
}
# Main loop...
while true
do
	echo "This will loop and hold until keyboard input is quitted."
	KEYBOARD
	if [ $? -eq 1 ]
	then
		break
	fi
done
echo "Now outside the loop..."
echo "$TEXT"
echo "Status = $status..."
AMIGA:amiga~/Desktop/Code/Shell> 
AMIGA:amiga~/Desktop/Code/Shell> 
AMIGA:amiga~/Desktop/Code/Shell> ./kb_loop2.sh
This will loop and hold until keyboard input is quitted.
Enter QUIT to quit:- NOTHING
This will loop and hold until keyboard input is quitted.
Enter QUIT to quit:- TEST
Hello World!
This will loop and hold until keyboard input is quitted.
Enter QUIT to quit:- QUIT
Exiting the KEYBOARD() function...
Now outside the loop...
YOU ARE HERE!
Status = 255...
AMIGA:amiga~/Desktop/Code/Shell> _

Thank you.

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LEARN ABOUT SUNOS

gnome-control-center

gnome-control-center(1) 					   User Commands					   gnome-control-center(1)

NAME

       gnome-control-center, gnome-desktop-prefs - configure desktop preferences

SYNOPSIS

       gnome-control-center [gnome-std-options] [--noshell]

DESCRIPTION

       Desktop	Preferences allows you to configure the GNOME desktop. If  Nautilus is running, gnome-control-center will open up a new window and
       display all your preference tools. If Nautilus is not running, gnome-control-center will display a simple interface allowing you to  select
       the  preference tool to run. There are 3 categories of preference tools: Basic, Advanced, and Accessibility.  Double-click on the tool that
       you require and the dialog for the tool will be displayed.

OPTIONS

       The following options are supported:

       --noshell       Do not display the Desktop Preferences in Nautilus. This is not a supported interface.

       gnome-std-optionStandard options available for use with most GNOME applications.  See gnome-std-options(5).

EXAMPLES

       Example 1: Launching Desktop Preferences

       example% gnome-control-center

EXIT STATUS

       The following exit values are returned:

       0	Application exited successfully

       >0	Application exited with failure

FILES

       The following files are used by this application:

       /usr/bin/gnome-control-cExecutable for Desktop Preferences interface

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+------------------------------+
       |      ATTRIBUTE TYPE	     |	     ATTRIBUTE VALUE	    |
       +-----------------------------+------------------------------+
       |Availability		     |SUNWgnome-desktop-preferences |
       +-----------------------------+------------------------------+
       |Interface stability	     |External			    |
       +-----------------------------+------------------------------+

SEE ALSO

       Preference Tools Manual

       Latest version of the GNOME Desktop User Guide for your platform.

       gnome-background-properties(1), gnome-font-properties(1),  gnome-keyboard-properties(1),  gnome-keybinding-properties(1),  gnome-ui-proper-
       ties(1),  gnome-mouse-properties(1),  gnome-network-preferences(1),  gnome-sound-properties(1), gnome-theme-properties(1), metacity-proper-
       ties(1), gnome-accessibility-keyboard-properties(1), cddb-slave2-properties(1), gnome-file-types-properties(1), gnome-panel-preferences(1),
       gnome-default-applications-properties(1), gnome-session-properties(1), gnome-std-options(5)

NOTES

       Written by Glynn Foster, Sun Microsystems  Inc., 2003.

SunOS 5.10							    2 Oct 2003						   gnome-control-center(1)