postinst is in libgstreamer1.0-0 1.10.4-1.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | #!/bin/sh
set -e
if [ "$1" = configure ]; then
# If we have setcap is installed, try setting cap_net_bind_service,cap_net_admin+ep,
# which allows us to install our helper binary without the setuid bit.
if command -v setcap > /dev/null; then
if setcap cap_net_bind_service,cap_net_admin+ep /usr/lib/x86_64-linux-gnu/gstreamer1.0/gstreamer-1.0/gst-ptp-helper; then
echo "Setcap worked! gst-ptp-helper is not suid!"
else
echo "Setcap failed on gst-ptp-helper, falling back to setuid" >&2
chmod u+s /usr/lib/x86_64-linux-gnu/gstreamer1.0/gstreamer-1.0/gst-ptp-helper
fi
else
echo "Setcap is not installed, falling back to setuid" >&2
chmod u+s /usr/lib/x86_64-linux-gnu/gstreamer1.0/gstreamer-1.0/gst-ptp-helper
fi
fi
exit 0
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