Mailinglist Archive: opensuse (3470 mails)

[Mads Martin Joergensen <mmj@xxxxxxxxxxxxxx>]

* Alin Dobre <alin.dobre@xxxxxxxxxxxxxxxx> [Sep 23. 2003 08:23]:
>   Hi,
> 
> It works
> killall -1 init
> restarts the init process (for example the inittab file is re-read).
> (HUP) signal works, so "for  which  it  has  not installed a signal 
> handler" is not true.

There's a signal handler for signal 1, which is HUP, yes. There's even
for more, if you look in the init source code:

/*
 *      We got a signal (HUP PWR WINCH ALRM INT)
 */
static
void signal_handler(int sig)
{ 
        ADDSET(got_signals, sig);
} 

What I quoted from the manual page was this:

 "It is impossible to send a signal to task number one,  the
  init process, for which it has not installed a signal han­
  dler.  This is done to assure the system  is  not  brought
  down accidentally."

If you application does not install a signalhandler for SIGKILL, that
does not mean your application is not killed, if we send kill -9 to it.
In the case of init, nothing happens.

-- 
Mads Martin Joergensen, http://mmj.dk
"Why make things difficult, when it is possible to make them cryptic
 and totally illogical, with just a little bit more effort?"
                                -- A. P. J.