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SubjectRe: What to do on ctrl-alt-del?
In article <>,
Hubert Mantel <> wrote:
>if you call reboot(2) to disable ctrl-alt-del, SIGINT will be sent to
>process 1 if the user presses ctrl-alt-del. This has been ok in the past
>but since Linux has the unique initrd feature there is not always a
>process with pid 1.

Why? Init is special in more ways then that one. For example, there should
always be a process with pid 1, that adopts the processes without a parent
and does a wait() to clean up after they die. Also, you can't kill process
#1 with -STOP or -KILL.

>As initrd is intended and used for installation
>purposes it might be necessary to allow linuxrc to intercept ctr-alt-del;
>otherwise the system immediately reboots upon that key combination without
>a clean shutdown. Wouldn't it be correct to send SIGINT to the process
>that disabled ctrl-alt-del?

I don't think so since that makes the "ctrlaltdel" utility pretty useless.

How do you manage to end up without a process #1 anyway?

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