filterout the Alt+Ctrl+Del

**toutarrive** · 24th March 2010, 14:54

What do your want to intercept the Ctrl+Alt+Del sequence for?
Ctrl+Alt+Del is designed to be handle by the system, and it doesn't sound a good idea to substitute yourself to the OS.

**toutarrive** · 24th March 2010, 22:22

Anyway, you can't do it at Qt level, you've got to use Win API.

Qt Code:

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SystemParametersInfo(SPI_SETSCREENSAVERRUNNING, TRUE, &bOldState, 0);

SystemParametersInfo(SPI_SETSCREENSAVERRUNNING, TRUE, &bOldState, 0);

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Have look at :http://www.qtcentre.org/threads/2529...T-CTRL-DEL!!!! and http://msdn.microsoft.com/en-us/libr...8VS.85%29.aspx

**squidge** · 24th March 2010, 22:26

Judging from his profile, it would seem that the OP wants it for Unix/X11, not Windows, in which case, comment out the line in /etc/inittab

**toutarrive** · 24th March 2010, 22:38

Well spotted ... Should read profile more carefully.
Sorry for that.

**sudhansu** · 25th March 2010, 05:36

Originally Posted by fatjuicymole

Judging from his profile, it would seem that the OP wants it for Unix/X11, not Windows, in which case, comment out the line in /etc/inittab

Yes fatjuicymole, I need to do it in Linux (using Qt). Can you plz tell me how to do in which case, comment out the line in /etc/inittab through coding?.

**squidge** · 25th March 2010, 07:55

If your app is running as a typical user (non-root), then you can't.

If it's SUID root then you can use reboot() api to modify ctrl-alt-del behavior.

Another alternative is to modify /etc/initab to check for the presence of a file or pipe before allowing the operation, and then control that file or pipe from your application.