Re: [Help-bash] question about trap

[MaShimiao]

Thank you. I got it.
On 01/16/2013 09:17 PM, Greg Wooledge wrote:
> On Wed, Jan 16, 2013 at 09:08:02AM +0800, MaShimiao wrote:
> > I read bash's changelog. And it says in version 4.2, "trap -p" will show
> > signals ignored at shell startup.
> > my question is which kind of signals will be ignored .
> Whatever you (or the process which invoked you) ignored.
>
> imadev:~$ ( trap '' USR1; bash -c 'trap -p' )
> trap -- '' SIGUSR1
>
> Compare to earlier version:
>
> imadev:~$ ( trap '' USR1; bash-4.1.9 -c 'trap -p' )
> imadev:~$