Hello, Matthias. On Tue, Oct 20, 2015 at 07:22:48PM +0200, Matthias Gerstner wrote: > Hi Alan,
> > I simply want to disable that one particular beeping at shutdown time. > well this topic made me curious where the beep is coming from. > It does originate from the shutdown command itself which is part of the > sys-apps/sysvinit package. In this package's source you find can a file > "src/dowall.c", where you will in turn find a function "wall(...)". > This is the function where the warning messages will be produced that > show up in the terminal and the message is produced like this: > snprintf(line, sizeof(line), > "\007\r\nBroadcast message from %s@%s %s(%s):\r\n\r\n", > user, hostname, tty, date); > The "\007" is the beep you're getting. It's a bell character that you > can produce manually by doing this, too: > echo -e "\007" > Unfortunately the bell character is hard coded into the warning message. > Also there seems to be no way to suppress the warning message. > But you could still try is to disable the interpretation of the bell > character by your terminal. Then you could make an alias or wrapper > around the original shutdown command that does this. > According to Arch Linux docs here: > https://wiki.archlinux.org/index.php/Disable_PC_speaker_beep > You can locally disable the bell in the terminal by calling "setterm > -blength 0". But this doesn't work with my terminals. Says it's > unsupported. > Then you can put this in your ~/.inputrc: "set bell-style none". This > works for me. Then, however, all terminals stop beeping. The pcspkr is > still loaded though and can be used. > As you only want to stop the beep only during shutdown you might also be > able to call "xset -b", disabling the bell on the X-server (globally?). > This is not persistent across reboots and you won't have any beeps until > the machine shuts down. Hey, that's brilliant! Thank you very much indeed! That is an answer much more complete than I could have expected. Probably the most satisfactory way for me to make it work the way I want is to build my own version of shutdown, removing the offending \007 from that sprintf format string..... and then to watch out for new versions of sys-apps/sysvinit. The package appears to be relatively stable. > Regards > Matthias -- Alan Mackenzie (Nuremberg, Germany).
