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I want to display a video when a wrong password is entered (say only in GUI login screen or within the display manager).

I have added a line to /etc/pam.d/common-auth to run my script /usr/local/bin/movie

# here are the per-package modules (the "Primary" block)
auth    [success=2 default=ignore]  pam_unix.so nullok_secure
auth    [default=ignore]                pam_exec.so seteuid /usr/local/bin/movie

The script /usr/local/bin/movie is simply:

#!/bin/bash
/usr/bin/mplayer /usr/local/movie.mp4
exit0

When entering password, I only get 0.1 s of black screen instead of the film.

How can I make my script working?

  • 1
    As in "Uh uh uh, you didn't say the magic word"? – Benjamin Dec 9 '16 at 18:18
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To display within a gnome session, add DISPLAY=<display ID>. For instance:

#!/bin/bash
DISPLAY=:0 /usr/bin/mplayer -fr /usr/local/movie.mp4
exit 0

with -fs for full screen.

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