postinst is in postgresql-9.1-postgis 1.5.3-2.
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 | #!/bin/sh
set -e
# Creates a link for the shared lib in the postgres area
if [ "$1" = "configure" ]; then
if [ -f /usr/lib/postgis/1.5.3/postgres/9.1/lib/postgis-1.5.so ]; then
ln -f /usr/lib/postgis/1.5.3/postgres/9.1/lib/postgis-1.5.so \
/usr/lib/postgresql/9.1/lib/postgis-1.5.so
else
echo "Postgis extension not found, something wrong did probably happen"
fi
fi
exit 0
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