Re: Request change to output of declare -f funcname

[Léa Gris]

Le 02/10/2021 à 15:09, Greg Wooledge écrivait :
> On Sat, Oct 02, 2021 at 01:41:35PM +0200, Léa Gris wrote:
> > $ declare -f hello
> >
> > hello ()
> > {
> >      echo 'hello';
> >      echo 'world'
> > }
> >
> > The issue is that in some circumstances, newline characters may be handled
> > as space, making the function declaration invalid.
>
> Can you show an example where the output of declare -f is invalid?

hello (){ echo 'hello';echo 'world';}

LC_MESSAGES=C sudo bash -c "$(declare -f hello);hello"
hello
world

LC_MESSAGES=C sudo -i bash -c "$(declare -f hello);hello"
bash: -c: line 2: syntax error: unexpected end of file

Better illustrated how newlines are discarded:

$ sudo bash -c 'echo hello
echo world'
> hello
> world

$ sudo -i bash -c 'echo hello
echo world'
> helloecho world

Or:

$ sudo bash -c "printf %q\\\n \"$(declare -f hello)\""
> $'hello () \n{ \n    echo \'hello you  the\';\n    echo \'world\'\n}'

sudo -i bash -c "printf %q\\\n \"$(declare -f hello)\""
> hello\ \(\)\ \{\ \ \ \ \ echo\ \'hello\ you\ \ the\'\;\ \ \ \ echo\ \'world\'\}




--
Léa Gris