postinst is in wireshark-common 2.0.2+ga16e22e-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 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | #!/bin/sh
set -e
. /usr/share/debconf/confmodule
PROGRAM=/usr/bin/dumpcap
GROUP=wireshark
if ! dpkg-statoverride --list $PROGRAM > /dev/null; then
db_get wireshark-common/install-setuid
if [ -e "$PROGRAM" ]; then
if [ "$RET" = "false" ] ; then
chown root:root $PROGRAM
chmod u=rwx,go=rx $PROGRAM
else
if ! addgroup --quiet --system $GROUP; then
if ! getent group wireshark > /dev/null; then
echo "Error: $GROUP group does not exist and executing \"addgroup --quiet --system $GROUP\" failed which prevents configuring Wireshark for capturing traffic as an unprivileged user."
echo "Please create the $GROUP system (or user) group and try configuring wireshark-common again."
exit 1
else
echo "Note: $GROUP is a user group, but the preferred configuration is setting it up as a system group. Purging wireshark-common will not remove the $GROUP group as a result, but otherwise everything should work properly."
fi
fi
chown root:$GROUP $PROGRAM
if which setcap > /dev/null ; then
chmod u=rwx,g=rx,o=r $PROGRAM
if ! setcap cap_net_raw,cap_net_admin=eip $PROGRAM; then
echo "Error: Setting capabilities for dumpcap using Linux Capabilities failed."
echo "Falling back to setting set-user-id bit."
chmod u=rwxs,g=rx,o=r $PROGRAM
fi
else
chmod u=rwxs,g=rx,o=r $PROGRAM
fi
fi
fi
else
echo "Preserving owner and mode for $PROGRAM set by dpkg-statoverride:"
dpkg-statoverride --list $PROGRAM
fi
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