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