Re: trap removement / termux issue

[Greg Wooledge]

On Sun, Jul 16, 2023 at 10:03:29PM +0200, alex xmb ratchev wrote:
> On Sun, Jul 16, 2023, 9:41 PM Greg Wooledge <greg@wooledge.org> wrote:
> 
> > On Sun, Jul 16, 2023 at 09:36:12PM +0200, alex xmb ratchev wrote:
> > > .. ignored upon entry .. who / how defines these
> >
> > The parent process.  This is how everything in Unix works.
> >
> 
> i just havent seen any vars or cmds for this

The parent process of bash, which is either a terminal emulator or
something like dbus.

It's a black box.  You have no way of knowing what it does, unless you
read its source code.  You can only observe the effects it has.

One of those effects is, apparently, setting a signal handler to ignore
the SIGRTMIN+4 signal, for some reason which is not immediately obvious.

Since bash inherits this ignored signal from its parent, bash leaves it
alone.

That's all.  Nothing more to see here.  Just ignore it.