postinst is in libnss-db 2.2.3pre1-3.2ubuntu3.
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 | #!/bin/sh
set -e
if [ "$1" = "configure" ]; then
if [ -n "$2" ]; then
if dpkg --compare-versions $2 lt 2.1.1-12 && \
dpkg --compare-versions $2 gt 2.1.1-0pre1.3
then
if [ -f /var/db/passwd.db ]; then
mv /var/db /var/db.old
ln -sf /var/lib/misc /var/db
cp -a /var/db.old/*.db /var/lib/misc/.
rm -rf /var/db.old
elif [ -f /var/state/glibc/passwd.db ]; then
mv /var/state/glibc /var/state/glibc.old
ln -sf /var/lib/misc /var/state/glibc
cp -a /var/state/glibc.old/*.db /var/lib/misc/.
rm -rf /var/state/glibc.old
fi
fi
fi
if [ -x /etc/init.d/nscd ]; then
if [ -x /usr/sbin/invoke-rc.d ]; then
invoke-rc.d nscd restart
else
/etc/init.d/nscd restart
fi
fi
fi
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