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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PIRL(1p)						User Contributed Perl Documentation						  PIRL(1p)

NAME

       pirl - A read-eval-print loop in Perl (see Shell::Perl)

SYNOPSIS

	   pirl
	   pirl --noornaments

	   pirl --version
	   pirl -v

EXAMPLE SESSION

	   $ pirl
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	   pirl @> 1+1
	   2

	   pirl @> use YAML qw(Load Dump);
	   ()

	   pirl @> $data = Load("--- { a: 1, b: [ 1, 2, 3] }
");
	   { a => 1, b => [1, 2, 3] }

	   pirl @> $var = 'a 1 2 3'; $var =~ /(w+) (d+) (d+)/
	   ("a", 1, 2)

	   pirl @> :q

DESCRIPTION

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       By now, read the fine details at "Shell::Perl" documentation.

OPTIONS

	   --ornaments - turn on terminal ornaments (default)
	   --noornaments - turn off terminal organments

	   --version, -v - prints version info and exits with 0

SEE ALSO

       Shell::Perl

BUGS

       Please report bugs via CPAN RT <http://rt.cpan.org/NoAuth/Bugs.html?Dist=Shell-Perl>.

AUTHOR

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       Caio Marcelo, <cmarcelo@cpan.org>

COPYRIGHT AND LICENSE

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       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.10.1							    2011-03-10								  PIRL(1p)