Control-Z the Sleep Signal
Dan Nelson
dnelson at allantgroup.com
Tue Jun 9 22:07:32 UTC 2009
In the last episode (Jun 09), Polytropon said:
> On Tue, 09 Jun 2009 16:30:30 -0500, Martin McCormick <martin at dc.cis.okstate.edu> wrote:
> > Which signal is sent to a process when one types ^z or Control-z? It
> > appears to be SIGSTOP and according to signal's man page, this is one
> > signal you can't catch.
^Z sends a SIGTSTP, which can be caught (or ignored, in your case).
18 SIGTSTP stop process stop signal generated from
keyboard
> According to
>
> % stty -g
> ... status=14:stop=13:susp=1a:time=0:werase=17: ...
^^^^^^^
> 17 SIGSTOP stop process stop (cannot be caught or
> ignored)
>
> And I think that 17 (decimal) is refered to as 1a (hexadecimal)
> in the previous stty command.
1a hex just refers to the control code itself (^Z), and doesn't indicate
which signal is sent.
--
Dan Nelson
dnelson at allantgroup.com
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