/lib/systemd/system-generators/postgresql-generator is in postgresql-common 190.
This file is owned by root:root, with mode 0o755.
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 | #!/bin/sh
# This systemd generator creates dependency symlinks that make all PostgreSQL
# clusters with "auto" in their start.conf file be started/stopped/reloaded
# when postgresql.service is started/stopped/reloaded.
set -eu
gendir="$1"
wantdir="$1/postgresql.service.wants"
pgservice="/lib/systemd/system/postgresql@.service"
mkdir -p "$wantdir"
for conf in /etc/postgresql/*/*/postgresql.conf; do
# abort loop if glob was not expanded (but accept dead symlinks)
if ! test -e "$conf" && ! test -L "$conf"; then continue; fi
dir="${conf%/*}"
# evaluate start.conf
if [ -e "$dir/start.conf" ]; then
start=$(sed 's/#.*$//; /^[[:space:]]*$/d; s/^\s*//; s/\s*$//' "$dir/start.conf")
else
start=auto
fi
[ "$start" = "auto" ] || continue
verdir="${dir%/*}"
version="${verdir##*/}"
cluster="${dir##*/}"
ln -s "$pgservice" "$wantdir/postgresql@$version-$cluster.service"
done
exit 0
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