26 lines
700 B
Nix
26 lines
700 B
Nix
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{ pkgs }:
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pkgs.writeDash "xkiller" ''
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set -efu
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exec >&2
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${pkgs.iproute}/bin/ss -lp src unix:/tmp/.X11-unix/X* |
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${pkgs.gnused}/bin/sed -n '
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s|.*/tmp/.X11-unix/X\([0-9]\+\)\>.*("X[^"]*",pid=\([0-9]\+\)\>.*|\1 \2|p
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' |
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while read -r display pid; do
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{
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exit_code=$(
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DISPLAY=:$display ${pkgs.coreutils}/bin/timeout 1 \
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${pkgs.xorg.xset}/bin/xset q >/dev/null 2>&1 &&
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echo 0 || echo $?
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)
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if test $exit_code = 124; then
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echo "X on display :$display is locked up; killing PID $pid..."
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${pkgs.coreutils}/bin/kill -SIGKILL "$pid"
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else
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echo "X on display :$display is healthy"
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fi
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} &
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done
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wait
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''
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