On Tue, Jun 12, 2007 at 07:42:13PM +0200, Sylvain Beucler wrote: > On Mon, Jun 11, 2007 at 09:26:12PM +0000, Paolo Giarrusso wrote: > > /bin/bash is running with stding and stdout attached to > > /dev/console, and on /dev/console ignores Ctrl-* (and that's on > > purpose, and not UML specific). Possibly just the terminal emulator > > is noticing the press of Ctrl-C, or it's /dev/console itself. > > That explains my problem, thanks. Do you know why that is (maybe so > that 'init' cannot be killed from keyboard)? > > > > If you run the open or openvt command, it will run bash on > > /dev/ttyXXX and there, you'll see that Ctrl-C works. > > Alas that doesn't seem to work from rootfstype: > # openvt /dev/tty0 > Couldnt get a file descriptor referring to the console > Could not get a file descriptor referring to the console > > I also tried > # tty > /dev/console > # exec < /dev/tty0 > /dev/tty0 2>/dev/tty0 > # tty > /dev/tty0 > > But that actually doesn't help. > > I'll try to isolate what getty does, as Jeff suggested; apparently it > registers some signals as well.
Actually the crucial part appears to be setsid(). (Otherwise "ps" doesn't show tty0 as the process' TTY.) It works now, C-c,C-\,C-z work directly :) I don't know exactly why setsid is necessary though :/ -- Sylvain > > ----- Messaggio originale ----- > > Da: Sylvain Beucler <[EMAIL PROTECTED]> > > A: user-mode-linux-user@lists.sourceforge.net > > Inviato: Lunedì 11 giugno 2007, 22:16:25 > > Oggetto: [uml-user] C-c/sig.intr is caught > > > > Hi, > > > > I'm working on 'umdo', i.e. sudo with User-Mode Linux (attached). > > > > I use the rootfstype=hostfs command line option. I notice, though, > > that C-c, C-\ and C-z (at least) do not work. I'm puzzled because the > > key events _are_ sent to the UML-jailed process, yet the signal is > > somehow blocked. > > > > Example: let's run "cat" from a UML'd bash, then press C-c, then C-h, > > then C-d (to quit "cat"): > > > > $ linux rootfstype=hostfs rw quiet init=/bin/bash > > root@(none):/# cat > > ^H > > root@(none):/# stty intr ^H > > root@(none):/# cat > > ^C > > root@(none):/# stty intr ^I > > root@(none):/# cat > > ^C^H > > > > Notice that each time, they key associated with 'intr' is caught > > sowewhere. > > > > Idem for C-\ (quit) > > Idem for C-z (susp) > > C-s (stop), C-q (start), C-d (eof) do work, though. > > > > > > There's more: running through 'getty' enables C-c and C-\ > > But C-z is still disabled: > > > > $ linux rw rootfstype=hostfs quiet init=/sbin/getty -inl /bin/bash 38400 > > tty0 > > root@(none):/# cat > > root@(none):/# # C-c worked. > > > > > > How can I enable all key shortcuts in a uml? > > Do you know what is the cause of this behavior? > > > > Thanks,
umdo.sh
Description: Bourne shell script
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