[Pkg-shadow-devel] Bug#469950: login: su blocks SIGHUP

[Samuel Thibault]

forcemerge 469950 458985
thanks

Nicolas François, le Fri 28 Mar 2008 23:30:25 +0100, a écrit :
> On Sat, Mar 08, 2008 at 09:33:54PM +1300, Jasen Betts wrote:
> > 
> > starting some tasks (eg: top - see Debian Bug #416976) in an xterm after 
> > using su can lead to undesirable behavior if the xterm is closed.
> 
> That's arguably the case even without su ;)
> 
> > After a little testing, it seems that the child process never gets 
> > the SIGHUP which it normally gets when su is not used (or it is used
> > and logged out of) and then the xterm is closed 
> 
> su does not block any SIGHUP.
> 
> I did not follow #416976. Samuel and Thomas, do you think there were
> anything wrong in the su behavior?

This is a duplicate of 416976.  Su is behaving correctly.  The kernel
is behaving correctly: it doesn't allow xterm to send signals to su
sessions for good reasons ;)

The problem is in bash that doesn't properly handle the case when it's
not permitted to SIGHUP all of its patriarchy.

Samuel