Merge branch 'master' into beta

README.md

@@ -24,8 +24,8 @@ For community-maintained types there is
 
 ## Participating
 
-IRC: ``#cdist`` @ freenode
+IRC: ``#cdist`` @ [libera](https://libera.chat)
 
 Matrix: ``#cdist:ungleich.ch``
 
-Mattermost: https://chat.ungleich.ch/ungleich/channels/cdist
+Matrix and IRC are bridged.

cdist/argparse.py

@@ -486,19 +486,31 @@ def get_parsers():
     parser['scan'].add_argument(
         '-m', '--mode', help='Which modes should run',
         action='append', default=[],
-        choices=['scan', 'trigger'])
+        choices=['scan', 'trigger', 'config'])
+    parser['scan'].add_argument(
+        '--list',
+        action='store_true',
+        help='List the known hosts and exit')
     parser['scan'].add_argument(
         '--config',
         action='store_true',
         help='Try to configure detected hosts')
     parser['scan'].add_argument(
-        '-I', '--interfaces',
+        '-I', '--interface',
-        action='append',  default=[],
+        action='append',  default=[], required=True,
         help='On which interfaces to scan/trigger')
     parser['scan'].add_argument(
-        '-d', '--delay',
+        '--name-mapper',
-        action='store',  default=3600,
+        action='store',  default=None,
-        help='How long to wait before reconfiguring after last try')
+        help='Map addresses to names, required for config mode')
+    parser['scan'].add_argument(
+        '-d', '--config-delay',
+        action='store',  default=3600, type=int,
+        help='How long (seconds) to wait before reconfiguring after last try')
+    parser['scan'].add_argument(
+        '-t', '--trigger-delay',
+        action='store',  default=5, type=int,
+        help='How long (seconds) to wait between ICMPv6 echo requests')
     parser['scan'].set_defaults(func=cdist.scan.commandline.commandline)
 
     # Trigger

cdist/conf/type/__apt_key/explorer/state

@@ -27,18 +27,25 @@ else
    keyid="$__object_id"
 fi
 
-keydir="$(cat "$__object/parameter/keydir")"
+# From apt-key(8):
-keyfile="$keydir/$__object_id.gpg"
+#   Use of apt-key is deprecated, except for the use of apt-key del in
-
+#   maintainer scripts to remove existing keys from the main keyring.
-if [ -d "$keydir" ]
+#   If such usage of apt-key is desired the additional installation of
-then
+#   the GNU Privacy Guard suite (packaged in gnupg) is required.
-   if [ -f "$keyfile" ]
+if [ -f "${__object}/parameter/use-deprecated-apt-key" ]; then
+   if apt-key export "$keyid" | head -n 1 | grep -Fqe "BEGIN PGP PUBLIC KEY BLOCK"
       then echo present
       else echo absent
    fi
-else
+   exit
-   # fallback to deprecated apt-key
-   apt-key export "$keyid" | head -n 1 | grep -Fqe "BEGIN PGP PUBLIC KEY BLOCK" \
-      && echo present \
-      || echo absent
 fi
+
+keydir="$(cat "$__object/parameter/keydir")"
+keyfile="$keydir/$__object_id.gpg"
+
+if [ -f "$keyfile" ]
+then
+   echo present
+   exit
+fi
+echo absent

cdist/conf/type/__apt_key/gencode-remote

@@ -25,11 +25,7 @@ else
 fi
 state_should="$(cat "$__object/parameter/state")"
 state_is="$(cat "$__object/explorer/state")"
-
+method="$(cat "$__object/key_method")"
-if [ "$state_should" = "$state_is" ]; then
-   # nothing to do
-   exit 0
-fi
 
 keydir="$(cat "$__object/parameter/keydir")"
 keyfile="$keydir/$__object_id.gpg"
@@ -37,30 +33,18 @@ keyfile="$keydir/$__object_id.gpg"
 case "$state_should" in
    present)
       keyserver="$(cat "$__object/parameter/keyserver")"
-
+      # Using __download or __file as key source
-      if [ -f "$__object/parameter/uri" ]; then
+      # Propagate messages if needed
-         uri="$(cat "$__object/parameter/uri")"
+      if [ "${method}" = "uri" ] || [ "${method}" = "source" ]; then
-
+         if grep -Eq "^__(file|download)$keyfile" "$__messages_in"; then
-         if [ -d "$keydir" ]; then
+            echo "added '$keyid'" >> "$__messages_out"
-            cat << EOF
-
-curl -s -L \\
-    -o "$keyfile" \\
-    "$uri"
-
-key="\$( cat "$keyfile" )"
-
-if echo "\$key" | grep -Fq 'BEGIN PGP PUBLIC KEY BLOCK'
-then
-    echo "\$key" | gpg --dearmor > "$keyfile"
-fi
-
-EOF
-         else
-            # fallback to deprecated apt-key
-            echo "curl -s -L '$uri' | apt-key add -"
          fi
-      elif [ -d "$keydir" ]; then
+         exit 0
+      elif [ "${state_is}" = "present" ]; then
+         exit 0
+      fi
+      # Using key servers to fetch the key
+      if [ ! -f "$__object/parameter/use-deprecated-apt-key" ]; then
          # we need to kill gpg after 30 seconds, because gpg
          # can get stuck if keyserver is not responding.
          # exporting env var and not exit 1,
@@ -100,13 +84,16 @@ EOF
       echo "added '$keyid'" >> "$__messages_out"
    ;;
    absent)
-      if [ -f "$keyfile" ]; then
+      # Removal for keys added from a keyserver without this flag
-         echo "rm '$keyfile'"
+      # is done in the manifest
-      else
+      if [ "$state_is" != "absent" ] && \
+            [ -f "$__object/parameter/use-deprecated-apt-key" ]; then
          # fallback to deprecated apt-key
          echo "apt-key del \"$keyid\""
-      fi
-
          echo "removed '$keyid'" >> "$__messages_out"
+      # Propagate messages if needed
+      elif grep -Eq "^__file$keyfile" "$__messages_in"; then
+         echo "removed '$keyid'" >> "$__messages_out"
+      fi
    ;;
 esac

cdist/conf/type/__apt_key/man.rst

@@ -10,6 +10,14 @@ DESCRIPTION
 -----------
 Manages the list of keys used by apt to authenticate packages.
 
+This is done by placing the requested key in a file named
+``$__object_id.gpg`` in the ``keydir`` directory.
+
+This is supported by modern releases of Debian-based distributions.
+
+In order of preference, exactly one of: ``source``, ``uri`` or ``keyid``
+must be specified.
+
 
 REQUIRED PARAMETERS
 -------------------
@@ -18,21 +26,49 @@ None.
 
 OPTIONAL PARAMETERS
 -------------------
+keydir
+   keyring directory, defaults to ``/etc/apt/trusted.pgp.d``, which is
+   enabled system-wide by default.
+
+source
+   path to a file containing the GPG key of the repository.
+   Using this is recommended as it ensures that the manifest/type manintainer
+   has validated the key.
+   If ``-``, the GPG key is read from the type's stdin.
+
 state
    'present' or 'absent'. Defaults to 'present'
 
+uri
+   the URI from which to download the key.
+   It is highly recommended that you only use protocols with TLS like HTTPS.
+   This uses ``__download`` but does not use checksums, if you want to ensure
+   that the key doesn't change, you are better off downloading it and using
+   ``--source``.
+
+
+DEPRECATED OPTIONAL PARAMETERS
+------------------------------
 keyid
-   the id of the key to add. Defaults to __object_id
+   the id of the key to download from the ``keyserver``.
+   This is to be used in absence of ``--source`` and ``--uri`` or together
+   with ``--use-deprecated-apt-key`` for key removal.
+   Defaults to ``$__object_id``.
 
 keyserver
-   the keyserver from which to fetch the key. If omitted the default set
+   the keyserver from which to fetch the key.
-   in ./parameter/default/keyserver is used.
+   Defaults to ``pool.sks-keyservers.net``.
 
-keydir
-   key save location, defaults to ``/etc/apt/trusted.pgp.d``
 
-uri
+DEPRECATED BOOLEAN PARAMETERS
-   the URI from which to download the key
+-----------------------------
+use-deprecated-apt-key
+   ``apt-key(8)`` will last be available in Debian 11 and Ubuntu 22.04.
+   You can use this parameter to force usage of ``apt-key(8)``.
+   Please only use this parameter to *remove* keys from the keyring,
+   in order to prepare for removal of ``apt-key``.
+   Adding keys should be done without this parameter.
+   This parameter will be removed when Debian 11 stops being supported.
 
 
 EXAMPLES
@@ -40,33 +76,39 @@ EXAMPLES
 
 .. code-block:: sh
 
-    # Add Ubuntu Archive Automatic Signing Key
+    # add a key that has been verified by a type maintainer
-    __apt_key 437D05B5
+    __apt_key jitsi_meet_2021 \
-    # Same thing
+       --source cdist-contrib/type/__jitsi_meet/files/apt_2021.gpg
-    __apt_key 437D05B5 --state present
-    # Get rid of it
-    __apt_key 437D05B5 --state absent
 
-    # same thing with human readable name and explicit keyid
+    # remove an old, deprecated or expired key
-    __apt_key UbuntuArchiveKey --keyid 437D05B5
+    __apt_key jitsi_meet_2016 --state absent
 
-    # same thing with other keyserver
+    # Get rid of a key that might have been added to
-    __apt_key UbuntuArchiveKey --keyid 437D05B5 --keyserver keyserver.ubuntu.com
+    # /etc/apt/trusted.gpg with apt-key
+    __apt_key 0x40976EAF437D05B5 --use-deprecated-apt-key --state absent
 
-    # download key from the internet
+    # add a key that we define in-line
-    __apt_key rabbitmq \
+    __apt_key jitsi_meet_2021 --source '-' <<EOF
-       --uri http://www.rabbitmq.com/rabbitmq-signing-key-public.asc
+    -----BEGIN PGP PUBLIC KEY BLOCK-----
+    [...]
+    -----END PGP PUBLIC KEY BLOCK-----
+    EOF
+
+    # download or update key from the internet
+    __apt_key rabbitmq_2007 \
+       --uri https://www.rabbitmq.com/rabbitmq-signing-key-public.asc
 
 
 AUTHORS
 -------
 Steven Armstrong <steven-cdist--@--armstrong.cc>
 Ander Punnar <ander-at-kvlt-dot-ee>
+Evilham <contact~~@~~evilham.com>
 
 
 COPYING
 -------
-Copyright \(C) 2011-2019 Steven Armstrong and Ander Punnar. You can
+Copyright \(C) 2011-2021 Steven Armstrong, Ander Punnar and Evilham. You can
 redistribute it and/or modify it under the terms of the GNU General Public
 License as published by the Free Software Foundation, either version 3 of the
 License, or (at your option) any later version.

cdist/conf/type/__apt_key/manifest

@@ -2,7 +2,105 @@
 
 __package gnupg
 
-if [ -f "$__object/parameter/uri" ]
+state_should="$(cat "${__object}/parameter/state")"
-then __package curl
+
-else __package dirmngr
+incompatible_args()
+{
+	cat >> /dev/stderr <<-EOF
+	This type does not support --${1} and --${method} simultaneously.
+	EOF
+	exit 1
+}
+
+if [ -f "${__object}/parameter/source" ]; then
+	method="source"
+	src="$(cat "${__object}/parameter/source")"
+	if [ "${src}" = "-" ]; then
+		src="${__object}/stdin"
+	fi
+fi
+if [ -f "${__object}/parameter/uri" ]; then
+	if [ -n "${method}" ]; then
+		incompatible_args uri
+	fi
+	method="uri"
+	src="$(cat "${__object}/parameter/uri")"
+fi
+if [ -f "${__object}/parameter/keyid" ]; then
+	if [ -n "${method}" ]; then
+		incompatible_args keyid
+	fi
+	method="keyid"
+fi
+# Keep old default
+if [ -z "${method}" ]; then
+	method="keyid"
+fi
+# Save this for later in gencode-remote
+echo "${method}" > "${__object}/key_method"
+
+# Required remotely (most likely already installed)
+__package dirmngr
+# We need this in case a key has to be dearmor'd
+__package gnupg
+export require="__package/gnupg"
+
+if [ -f "${__object}/parameter/use-deprecated-apt-key" ]; then
+	# This is required if apt-key(8) is to be used
+	if [ "${method}" = "source" ] || [ "${method}" = "uri" ]; then
+		incompatible_args use-deprecated-apt-key
+	fi
+else
+	if [ "${state_should}" = "absent" ] && \
+			[ -f "${__object}/parameter/keyid" ]; then
+		cat >> /dev/stderr <<EOF
+You can't reliably remove by keyid without --use-deprecated-apt-key.
+This would very likely do something you do not intend.
+EOF
+		exit 1
+	fi
+fi
+
+keydir="$(cat "${__object}/parameter/keydir")"
+keyfile="${keydir}/${__object_id}.gpg"
+keyfilecdist="${keyfile}.cdist"
+if [ "${state_should}" != "absent" ]; then
+	# Ensure keydir exists
+	__directory "${keydir}" --state exists --mode 0755
+fi
+
+if [ "${state_should}" = "absent" ]; then
+	__file "${keyfile}" --state "absent"
+	__file "${keyfilecdist}" --state "absent"
+elif [ "${method}" = "source" ] || [ "${method}" = "uri" ]; then
+	dearmor="$(cat <<-EOF
+	if [ '${state_should}' = 'present' ]; then
+		# Dearmor if necessary
+		if grep -Fq 'BEGIN PGP PUBLIC KEY BLOCK' '${keyfilecdist}'; then
+			gpg --dearmor < '${keyfilecdist}' > '${keyfile}'
+		else
+			cp '${keyfilecdist}' '${keyfile}'
+		fi
+		# Ensure permissions
+		chown root '${keyfile}'
+		chmod 0444 '${keyfile}'
+	fi
+	EOF
+	)"
+
+	if [ "${method}" = "uri" ]; then
+		__download "${keyfilecdist}" \
+			--url "${src}" \
+			--onchange "${dearmor}"
+		require="__download${keyfilecdist}" \
+			__file "${keyfile}" \
+				--owner root \
+				--mode 0444 \
+				--state pre-exists
+	else
+		__file "${keyfilecdist}" --state "${state_should}" \
+			--mode 0444 \
+			--source "${src}" \
+			--onchange "${dearmor}"
+	fi
 fi

cdist/conf/type/__apt_key/parameter/boolean

@@ -0,0 +1 @@
+use-deprecated-apt-key

cdist/conf/type/__apt_key/parameter/deprecated/use-deprecated-apt-key

@@ -0,0 +1,3 @@
+apt-key(8) will last be available in Debian 11 and Ubuntu 22.04.
+Use this flag *only* to migrate to placing a keyring directly in the
+/etc/apt/trusted.gpg.d/ directory with a descriptive name.

cdist/conf/type/__apt_key/parameter/optional

@@ -1,5 +1,6 @@
-state
+keydir
 keyid
 keyserver
-keydir
+source
+state
 uri

cdist/conf/type/__apt_key_uri/deprecated

@@ -0,0 +1 @@
+Please migrate to using __apt_key key_id --uri URI.

cdist/conf/type/__debconf_set_selections/explorer/state

@@ -0,0 +1,142 @@
+#!/bin/sh -e
+#
+# 2021 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
+#
+# This file is part of cdist.
+#
+# cdist is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# cdist is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with cdist. If not, see <http://www.gnu.org/licenses/>.
+#
+# Determine current debconf selections' state.
+# Prints one of:
+#   present: all selections are already set as they should.
+#   different: one or more of the selections have a different value.
+#   absent: one or more of the selections are not (currently) defined.
+#
+
+test -x /usr/bin/perl || {
+	# cannot find perl (no perl ~ no debconf)
+	echo 'absent'
+	exit 0
+}
+
+linesfile="${__object:?}/parameter/line"
+test -s "${linesfile}" || {
+	if test -s "${__object:?}/parameter/file"
+	then
+		echo absent
+	else
+		echo present
+	fi
+	exit 0
+}
+
+# assert __type_explorer is set (because it is used by the Perl script)
+: "${__type_explorer:?}"
+
+/usr/bin/perl -- - "${linesfile}" <<'EOF'
+use strict;
+use warnings "all";
+
+use Fcntl qw(:DEFAULT :flock);
+
+use Debconf::Db;
+use Debconf::Question;
+
+# Extract @known... arrays from debconf-set-selections
+# These values are required to distinguish flags and values in the given lines.
+# DC: I couldn't think of a more ugly solution to the problem…
+my @knownflags;
+my @knowntypes;
+my $debconf_set_selections = '/usr/bin/debconf-set-selections';
+if (-e $debconf_set_selections) {
+	my $sed_known = 's/^my \(@known\(flags\|types\) = qw([a-z ]*);\).*$/\1/p';
+	eval `sed -n '$sed_known' '$debconf_set_selections'`;
+}
+
+sub mungeline ($) {
+	my $line = shift;
+	chomp $line;
+	$line =~ s/\r$//;
+	return $line;
+}
+
+sub fatal { printf STDERR @_; exit 1; }
+
+my $state = 'present';
+
+sub state {
+	my $new = shift;
+	if ($state eq 'present'
+	    or ($state eq 'different' and $new eq 'absent')) {
+		$state = $new;
+	}
+}
+
+
+# Load Debconf DB but manually lock on the state explorer script,
+# because Debconf aborts immediately if executed concurrently.
+# This is not really an ideal solution because the Debconf DB could be locked by
+# another process (e.g. apt-get), but no way to achieve this could be found.
+# If you know how to, please provide a patch.
+my $lockfile = "%ENV{'__type_explorer'}/state";
+if (open my $lock_fh, '+<', $lockfile) {
+   flock $lock_fh, LOCK_EX or die "Cannot lock $lockfile";
+}
+{
+	Debconf::Db->load(readonly => 'true');
+}
+
+
+while (<>) {
+	# Read and process lines (taken from debconf-set-selections)
+	$_ = mungeline($_);
+	while (/\\$/ && ! eof) {
+		s/\\$//;
+		$_ .= mungeline(<>);
+	}
+	next if /^\s*$/ || /^\s*\#/;
+
+	my ($owner, $label, $type, $content) = /^\s*(\S+)\s+(\S+)\s+(\S+)(?:\s(.*))?/
+		or fatal "invalid line: %s\n", $_;
+	$content = '' unless defined $content;
+
+
+	# Compare is and should state
+	my $q = Debconf::Question->get($label);
+
+	unless (defined $q) {
+		# probably a preseed
+		state 'absent';
+		next;
+	}
+
+	if (grep { $_ eq $q->type } @knownflags) {
+		# This line wants to set a flag, presumably.
+		if ($q->flag($q->type) ne $content) {
+			state 'different';
+		}
+	} else {
+		# Otherwise, it's probably a value…
+		if ($q->value ne $content) {
+			state 'different';
+		}
+
+		unless (grep { $_ eq $owner } (split /, /, $q->owners)) {
+			state 'different';
+		}
+	}
+}
+
+printf "%s\n", $state;
+EOF

cdist/conf/type/__debconf_set_selections/gencode-remote

@@ -1,6 +1,7 @@
 #!/bin/sh -e
 #
 # 2011-2014 Nico Schottelius (nico-cdist at schottelius.org)
+# 2021 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
 #
 # This file is part of cdist.
 #
@@ -17,16 +18,37 @@
 # You should have received a copy of the GNU General Public License
 # along with cdist. If not, see <http://www.gnu.org/licenses/>.
 #
-#
-# Setup selections
-#
 
-filename="$(cat "$__object/parameter/file")"
+if test -f "${__object:?}/parameter/line"
-
+then
-if [ "$filename" = "-" ]; then
+	filename="${__object:?}/parameter/line"
-    filename="$__object/stdin"
+elif test -s "${__object:?}/parameter/file"
+then
+	filename=$(cat "${__object:?}/parameter/file")
+	if test "${filename}" = '-'
+	then
+		filename="${__object:?}/stdin"
+	fi
+else
+	printf 'Neither --line nor --file set.\n' >&2
+	exit 1
 fi
 
-echo "debconf-set-selections << __file-eof"
+# setting no lines makes no sense
-cat "$filename"
+test -s "${filename}" || exit 0
-echo "__file-eof"
+
+state_is=$(cat "${__object:?}/explorer/state")
+
+if test "${state_is}" != 'present'
+then
+	cat <<-CODE
+	debconf-set-selections <<'EOF'
+	$(cat "${filename}")
+	EOF
+	CODE
+
+	awk '
+		{
+			printf "set %s %s %s %s\n", $1, $2, $3, $4
+		}' "${filename}" >>"${__messages_out:?}"
+fi

cdist/conf/type/__debconf_set_selections/man.rst

@@ -8,15 +8,33 @@ cdist-type__debconf_set_selections - Setup debconf selections
 
 DESCRIPTION
 -----------
-On Debian and alike systems debconf-set-selections(1) can be used
+On Debian and alike systems :strong:`debconf-set-selections`\ (1) can be used
 to setup configuration parameters.
 
 
 REQUIRED PARAMETERS
 -------------------
+cf. ``--line``.
+
+
+OPTIONAL PARAMETERS
+-------------------
 file
-   Use the given filename as input for debconf-set-selections(1)
+   Use the given filename as input for :strong:`debconf-set-selections`\ (1)
-   If filename is "-", read from stdin.
+   If filename is ``-``, read from stdin.
+
+   **This parameter is deprecated, because it doesn't work with state detection.**
+line
+   A line in :strong:`debconf-set-selections`\ (1) compatible format.
+   This parameter can be used multiple times to set multiple options.
+
+   (This parameter is actually required, but marked optional because the
+   deprecated ``--file`` is still accepted.)
+
+
+BOOLEAN PARAMETERS
+------------------
+None.
 
 
 EXAMPLES
@@ -24,30 +42,29 @@ EXAMPLES
 
 .. code-block:: sh
 
-    # Setup configuration for nslcd
+    # Setup gitolite's gituser
-    __debconf_set_selections nslcd --file /path/to/file
+    __debconf_set_selections nslcd --line 'gitolite gitolite/gituser string git'
 
-    # Setup configuration for nslcd from another type
+    # Setup configuration for nslcd from a file.
-    __debconf_set_selections nslcd --file "$__type/files/preseed/nslcd"
+    # NB: Multiple lines can be passed to --line, although this can be considered a hack.
-
+    __debconf_set_selections nslcd --line "$(cat "${__files:?}/preseed/nslcd.debconf")"
-    __debconf_set_selections nslcd --file - << eof
-    gitolite gitolite/gituser string git
-    eof
 
 
 SEE ALSO
 --------
-:strong:`debconf-set-selections`\ (1), :strong:`cdist-type__update_alternatives`\ (7)
+- :strong:`cdist-type__update_alternatives`\ (7)
+- :strong:`debconf-set-selections`\ (1)
 
 
 AUTHORS
 -------
-Nico Schottelius <nico-cdist--@--schottelius.org>
+| Nico Schottelius <nico-cdist--@--schottelius.org>
+| Dennis Camera <dennis.camera--@--ssrq-sds-fds.ch>
 
 
 COPYING
 -------
-Copyright \(C) 2011-2014 Nico Schottelius. You can redistribute it
+Copyright \(C) 2011-2014 Nico Schottelius, 2021 Dennis Camera.
-and/or modify it under the terms of the GNU General Public License as
+You can redistribute it and/or modify it under the terms of the GNU General
-published by the Free Software Foundation, either version 3 of the
+Public License as published by the Free Software Foundation, either version 3 of
-License, or (at your option) any later version.
+the License, or (at your option) any later version.

cdist/conf/type/__debconf_set_selections/manifest

@@ -0,0 +1,21 @@
+#!/bin/sh -e
+#
+# 2021 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
+#
+# This file is part of cdist.
+#
+# cdist is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# cdist is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with cdist. If not, see <http://www.gnu.org/licenses/>.
+#
+
+__package_apt debconf

cdist/conf/type/__debconf_set_selections/parameter/optional_multiple

@@ -0,0 +1 @@
+line

cdist/conf/type/__download/explorer/remote_cmd

@@ -1,19 +0,0 @@
-#!/bin/sh -e
-
-if [ -f "$__object/parameter/cmd-get" ]
-then
-    cmd="$( cat "$__object/parameter/cmd-get" )"
-
-elif command -v curl > /dev/null
-then
-    cmd="curl -L -o - '%s'"
-
-elif command -v fetch > /dev/null
-then
-    cmd="fetch -o - '%s'"
-
-else
-    cmd="wget -O - '%s'"
-fi
-
-echo "$cmd"

cdist/conf/type/__download/explorer/remote_cmd_get

@@ -0,0 +1,16 @@
+#!/bin/sh -e
+
+if [ -f "$__object/parameter/cmd-get" ]
+then
+    cat "$__object/parameter/cmd-get"
+elif
+    command -v curl > /dev/null
+then
+    echo "curl -sSL -o - '%s'"
+elif
+    command -v fetch > /dev/null
+then
+    echo "fetch -o - '%s'"
+else
+    echo "wget -O - '%s'"
+fi

cdist/conf/type/__download/explorer/remote_cmd_sum

@@ -0,0 +1,82 @@
+#!/bin/sh -e
+
+if [ ! -f "$__object/parameter/sum" ]
+then
+    exit 0
+fi
+
+if [ -f "$__object/parameter/cmd-sum" ]
+then
+    cat "$__object/parameter/cmd-sum"
+    exit 0
+fi
+
+sum_should="$( cat "$__object/parameter/sum" )"
+
+if echo "$sum_should" | grep -Fq ':'
+then
+    sum_hash="$( echo "$sum_should" | cut -d : -f 1 )"
+else
+    if echo "$sum_should" | grep -Eq '^[0-9]+\s[0-9]+$'
+    then
+        sum_hash='cksum'
+    elif
+        echo "$sum_should" | grep -Eiq '^[a-f0-9]{32}$'
+    then
+        sum_hash='md5'
+    elif
+        echo "$sum_should" | grep -Eiq '^[a-f0-9]{40}$'
+    then
+        sum_hash='sha1'
+    elif
+        echo "$sum_should" | grep -Eiq '^[a-f0-9]{64}$'
+    then
+        sum_hash='sha256'
+    else
+        echo 'hash format detection failed' >&2
+        exit 1
+    fi
+fi
+
+os="$( "$__explorer/os" )"
+
+case "$sum_hash" in
+    cksum)
+        echo "cksum %s | awk '{print \$1\" \"\$2}'"
+    ;;
+    md5)
+        case "$os" in
+            freebsd)
+                echo "md5 -q %s"
+            ;;
+            *)
+                echo "md5sum %s | awk '{print \$1}'"
+            ;;
+        esac
+    ;;
+    sha1)
+        case "$os" in
+            freebsd)
+                echo "sha1 -q %s"
+            ;;
+            *)
+                echo "sha1sum %s | awk '{print \$1}'"
+            ;;
+        esac
+    ;;
+    sha256)
+        case "$os" in
+            freebsd)
+                echo "sha256 -q %s"
+            ;;
+            *)
+                echo "sha256sum %s | awk '{print \$1}'"
+            ;;
+        esac
+    ;;
+    *)
+        # we arrive here only if --sum is given with unknown format prefix
+        echo "unknown hash format: $sum_hash" >&2
+        exit 1
+    ;;
+esac

cdist/conf/type/__download/explorer/state

@@ -1,6 +1,11 @@
 #!/bin/sh -e
 
-dst="/$__object_id"
+if [ -f "$__object/parameter/destination" ]
+then
+    dst="$( cat "$__object/parameter/destination" )"
+else
+    dst="/$__object_id"
+fi
 
 if [ ! -f "$dst" ]
 then
@@ -16,57 +21,19 @@ fi
 
 sum_should="$( cat "$__object/parameter/sum" )"
 
-if [ -f "$__object/parameter/cmd-sum" ]
+if echo "$sum_should" | grep -Fq ':'
 then
-    # shellcheck disable=SC2059
+    sum_should="$( echo "$sum_should" | cut -d : -f 2 )"
-    sum_is="$( eval "$( printf \
-        "$( cat "$__object/parameter/cmd-sum" )" \
-        "$dst" )" )"
-else
-    os="$( "$__explorer/os" )"
-
-    if echo "$sum_should" | grep -Eq '^[0-9]+\s[0-9]+$'
-    then
-        sum_is="$( cksum "$dst" | awk '{print $1" "$2}' )"
-
-    elif echo "$sum_should" | grep -Eiq '^md5:[a-f0-9]{32}$'
-    then
-        case "$os" in
-            freebsd)
-                sum_is="md5:$( md5 -q "$dst" )"
-            ;;
-            *)
-                sum_is="md5:$( md5sum "$dst" | awk '{print $1}' )"
-            ;;
-        esac
-
-    elif echo "$sum_should" | grep -Eiq '^sha1:[a-f0-9]{40}$'
-    then
-        case "$os" in
-            freebsd)
-                sum_is="sha1:$( sha1 -q "$dst" )"
-            ;;
-            *)
-                sum_is="sha1:$( sha1sum "$dst" | awk '{print $1}' )"
-            ;;
-        esac
-
-    elif echo "$sum_should" | grep -Eiq '^sha256:[a-f0-9]{64}$'
-    then
-        case "$os" in
-            freebsd)
-                sum_is="sha256:$( sha256 -q "$dst" )"
-            ;;
-            *)
-                sum_is="sha256:$( sha256sum "$dst" | awk '{print $1}' )"
-            ;;
-        esac
-    fi
 fi
 
+sum_cmd="$( "$__type_explorer/remote_cmd_sum" )"
+
+# shellcheck disable=SC2059
+sum_is="$( eval "$( printf "$sum_cmd" "'$dst'" )" )"
+
 if [ -z "$sum_is" ]
 then
-    echo 'no checksum from target' >&2
+    echo 'existing destination checksum failed' >&2
     exit 1
 fi
 

cdist/conf/type/__download/gencode-local

@@ -11,34 +11,133 @@ fi
 
 url="$( cat "$__object/parameter/url" )"
 
-tmp="$( mktemp )"
+if [ -f "$__object/parameter/destination" ]
-
+then
-dst="/$__object_id"
+    dst="$( cat "$__object/parameter/destination" )"
+else
+    dst="/$__object_id"
+fi
 
 if [ -f "$__object/parameter/cmd-get" ]
 then
     cmd="$( cat "$__object/parameter/cmd-get" )"
 
-elif command -v wget > /dev/null
-then
-    cmd="wget -O - '%s'"
-
 elif command -v curl > /dev/null
 then
-    cmd="curl -L -o - '%s'"
+    cmd="curl -sSL -o - '%s'"
 
 elif command -v fetch > /dev/null
 then
     cmd="fetch -o - '%s'"
 
+elif command -v wget > /dev/null
+then
+    cmd="wget -O - '%s'"
+
 else
-    echo 'no usable locally installed utility for downloading' >&2
+    echo 'local download failed, no usable utility' >&2
     exit 1
 fi
 
-printf "$cmd > %s\n" \
+echo "download_tmp=\"\$( mktemp )\""
-    "$url" \
+
-    "$tmp"
+# shellcheck disable=SC2059
+printf "$cmd > \"\$download_tmp\"\n" "$url"
+
+if [ -f "$__object/parameter/sum" ]
+then
+    sum_should="$( cat "$__object/parameter/sum" )"
+
+    if [ -f "$__object/parameter/cmd-sum" ]
+    then
+        local_cmd_sum="$( cat "$__object/parameter/cmd-sum" )"
+    else
+        if echo "$sum_should" | grep -Fq ':'
+        then
+            sum_hash="$( echo "$sum_should" | cut -d : -f 1 )"
+
+            sum_should="$( echo "$sum_should" | cut -d : -f 2 )"
+        else
+            if echo "$sum_should" | grep -Eq '^[0-9]+\s[0-9]+$'
+            then
+                sum_hash='cksum'
+            elif
+                echo "$sum_should" | grep -Eiq '^[a-f0-9]{32}$'
+            then
+                sum_hash='md5'
+            elif
+                echo "$sum_should" | grep -Eiq '^[a-f0-9]{40}$'
+            then
+                sum_hash='sha1'
+            elif
+                echo "$sum_should" | grep -Eiq '^[a-f0-9]{64}$'
+            then
+                sum_hash='sha256'
+            else
+                echo 'hash format detection failed' >&2
+                exit 1
+            fi
+        fi
+
+        case "$sum_hash" in
+            cksum)
+                local_cmd_sum="cksum %s | awk '{print \$1\" \"\$2}'"
+            ;;
+            md5)
+                if command -v md5 > /dev/null
+                then
+                    local_cmd_sum="md5 -q %s"
+                elif
+                    command -v md5sum > /dev/null
+                then
+                    local_cmd_sum="md5sum %s | awk '{print \$1}'"
+                fi
+            ;;
+            sha1)
+                if command -v sha1 > /dev/null
+                then
+                    local_cmd_sum="sha1 -q %s"
+                elif
+                    command -v sha1sum > /dev/null
+                then
+                    local_cmd_sum="sha1sum %s | awk '{print \$1}'"
+                fi
+            ;;
+            sha256)
+                if command -v sha256 > /dev/null
+                then
+                    local_cmd_sum="sha256 -q %s"
+                elif
+                    command -v sha256sum > /dev/null
+                then
+                    local_cmd_sum="sha256sum %s | awk '{print \$1}'"
+                fi
+            ;;
+            *)
+                # we arrive here only if --sum is given with unknown format prefix
+                echo "unknown hash format: $sum_hash" >&2
+                exit 1
+            ;;
+        esac
+
+        if [ -z "$local_cmd_sum" ]
+        then
+            echo 'local checksum verification failed, no usable utility' >&2
+            exit 1
+        fi
+    fi
+
+    # shellcheck disable=SC2059
+    echo "sum_is=\"\$( $( printf "$local_cmd_sum" "\"\$download_tmp\"" ) )\""
+
+    echo "if [ \"\$sum_is\" != '$sum_should' ]; then"
+
+    echo "echo 'local download checksum mismatch' >&2"
+
+    echo "rm -f \"\$download_tmp\""
+
+    echo 'exit 1; fi'
+fi
 
 if echo "$__target_host" | grep -Eq '^[0-9a-fA-F:]+$'
 then
@@ -47,12 +146,10 @@ else
     target_host="$__target_host"
 fi
 
-printf '%s %s %s:%s\n' \
+# shellcheck disable=SC2016
+printf '%s "$download_tmp" %s:%s\n' \
     "$__remote_copy" \
-    "$tmp" \
     "$target_host" \
     "$dst"
 
-echo "rm -f '$tmp'"
+echo "rm -f \"\$download_tmp\""
-
-echo 'downloaded' > "$__messages_out"

cdist/conf/type/__download/gencode-remote

@@ -6,17 +6,51 @@ state_is="$( cat "$__object/explorer/state" )"
 
 if [ "$download" = 'remote' ] && [ "$state_is" != 'present' ]
 then
-    cmd="$( cat "$__object/explorer/remote_cmd" )"
+    cmd_get="$( cat "$__object/explorer/remote_cmd_get" )"
 
     url="$( cat "$__object/parameter/url" )"
 
+    if [ -f "$__object/parameter/destination" ]
+    then
+        dst="$( cat "$__object/parameter/destination" )"
+    else
         dst="/$__object_id"
+    fi
 
-    printf "$cmd > %s\n" \
+    echo "download_tmp=\"\$( mktemp )\""
-        "$url" \
-        "$dst"
 
-    echo 'downloaded' > "$__messages_out"
+    # shellcheck disable=SC2059
+    printf "$cmd_get > \"\$download_tmp\"\n" "$url"
+
+    if [ -f "$__object/parameter/sum" ]
+    then
+        sum_should="$( cat "$__object/parameter/sum" )"
+
+        if [ -f "$__object/parameter/cmd-sum" ]
+        then
+            remote_cmd_sum="$( cat "$__object/parameter/cmd-sum" )"
+        else
+            remote_cmd_sum="$( cat "$__object/explorer/remote_cmd_sum" )"
+
+            if echo "$sum_should" | grep -Fq ':'
+            then
+                sum_should="$( echo "$sum_should" | cut -d : -f 2 )"
+            fi
+        fi
+
+        # shellcheck disable=SC2059
+        echo "sum_is=\"\$( $( printf "$remote_cmd_sum" "\"\$download_tmp\"" ) )\""
+
+        echo "if [ \"\$sum_is\" != '$sum_should' ]; then"
+
+        echo "echo 'remote download checksum mismatch' >&2"
+
+        echo "rm -f \"\$download_tmp\""
+
+        echo 'exit 1; fi'
+    fi
+
+    echo "mv \"\$download_tmp\" '$dst'"
 fi
 
 if [ -f "$__object/parameter/onchange" ] && [ "$state_is" != "present" ]

cdist/conf/type/__download/man.rst

@@ -8,7 +8,7 @@ cdist-type__download - Download a file
 
 DESCRIPTION
 -----------
-By default type will try to use ``wget``, ``curl`` or ``fetch``.
+By default type will try to use ``curl``, ``fetch`` or ``wget``.
 If download happens in target (see ``--download``) then type will
 fallback to (and install) ``wget``.
 
@@ -16,6 +16,8 @@ If download happens in local machine, then environment variables like
 ``{http,https,ftp}_proxy`` etc can be used on cdist execution
 (``http_proxy=foo cdist config ...``).
 
+To change downloaded file's owner, group or permissions, use ``require='__download/path/to/file' __file ...``.
+
 
 REQUIRED PARAMETERS
 -------------------
@@ -25,14 +27,29 @@ url
 
 OPTIONAL PARAMETERS
 -------------------
+destination
+   Downloaded file's destination in target. If unset, ``$__object_id`` is used.
+
 sum
-   Checksum is used to decide if existing destination file must be redownloaded.
+   Supported formats: ``cksum`` output without file name, MD5, SHA1 and SHA256.
-   By default output of ``cksum`` without filename is expected.
+
-   Other hash formats supported with prefixes: ``md5:``, ``sha1:`` and ``sha256:``.
+   Type tries to detect hash format with regexes, but prefixes
+   ``cksum:``, ``md5:``, ``sha1:`` and ``sha256:`` are also supported.
+
+   Checksum have two purposes - state check and post-download verification.
+   In state check, if destination checksum mismatches, then content of URL
+   will be downloaded to temporary file. If downloaded temporary file's
+   checksum matches, then it will be moved to destination (overwritten).
+
+   For local downloads it is expected that usable utilities for checksum
+   calculation exist in the system.
 
 download
-   If ``local`` (default), then download file to local storage and copy
+   If ``local`` (default), then file is downloaded to local storage and copied
-   it to target host. If ``remote``, then download happens in target.
+   to target host. If ``remote``, then download happens in target.
+
+   For local downloads it is expected that usable utilities for downloading
+   exist in the system. Type will try to use ``curl``, ``fetch`` or ``wget``.
 
 cmd-get
    Command used for downloading.
@@ -62,7 +79,7 @@ EXAMPLES
     require='__directory/opt/cpma' \
         __download /opt/cpma/cnq3.zip \
             --url https://cdn.playmorepromode.com/files/cnq3/cnq3-1.51.zip \
-            --sum md5:46da3021ca9eace277115ec9106c5b46
+            --sum 46da3021ca9eace277115ec9106c5b46
 
     require='__download/opt/cpma/cnq3.zip' \
         __unpack /opt/cpma/cnq3.zip \

cdist/conf/type/__download/manifest

@@ -1,6 +1,6 @@
 #!/bin/sh -e
 
-if grep -Eq '^wget' "$__object/explorer/remote_cmd"
+if grep -Eq '^wget' "$__object/explorer/remote_cmd_get"
 then
     __package wget
 fi

cdist/conf/type/__download/parameter/optional

@@ -1,5 +1,6 @@
-sum
 cmd-get
 cmd-sum
+destination
 download
 onchange
+sum

cdist/conf/type/__git/explorer/group

@@ -14,6 +14,11 @@ then
 	then
 		printf '%u\n' "${group_gid}"
 	else
-		printf '%s\n' "$(id -u -n "${group_gid}")"
+		if command -v getent > /dev/null
+		then
+			getent group "${group_gid}" | cut -d : -f 1
+		else
+			awk -F: -v gid="${group_gid}" '$3 == gid { print $1 }' /etc/group
+		fi
 	fi
 fi

cdist/conf/type/__letsencrypt_cert/explorer/certbot-path

@@ -1,3 +0,0 @@
-#!/bin/sh -e
-
-command -v certbot 2>/dev/null || true

cdist/conf/type/__letsencrypt_cert/explorer/certificate-data

@@ -0,0 +1,78 @@
+#!/bin/sh -e
+certbot_path="$(command -v certbot 2>/dev/null || true)"
+# Defaults
+certificate_exists="no"
+certificate_is_test="no"
+
+if [ -n "${certbot_path}" ]; then
+	# Find python executable that has access to certbot's module
+	python_path=$(sed -n '1s/^#! *//p' "${certbot_path}")
+
+	# Use a lock for cdist due to certbot not exiting with failure
+	# or having any flags for concurrent use.
+	_certbot() {
+		${python_path} - 2>/dev/null <<EOF
+from certbot.main import main
+import fcntl
+lock_file = "/tmp/certbot.cdist.lock"
+timeout=60
+with open(lock_file, 'w') as fd:
+    for i in range(timeout):
+        try:
+            # Get exclusive lock
+            fcntl.flock(fd, fcntl.LOCK_EX | fcntl.LOCK_NB)
+            break
+        except:
+            # Wait if that fails
+            import time
+            time.sleep(1)
+    else:
+        # Timed out, exit with failure
+        import sys
+        sys.exit(1)
+    # Do list certificates
+    main(["certificates", "--cert-name", "${__object_id:?}"])
+EOF
+	}
+
+
+	_certificate_exists() {
+		if grep -q "  Certificate Name: ${__object_id:?}$"; then
+			echo yes
+		else
+			echo no
+		fi
+	}
+
+	_certificate_is_test() {
+		if grep -q 'INVALID: TEST_CERT'; then
+			echo yes
+		else
+			echo no
+		fi
+	}
+
+	_certificate_domains() {
+		grep '    Domains: ' | cut -d ' ' -f 6- | tr ' ' '\n'
+	}
+
+	# Get data about all available certificates
+	certificates="$(_certbot)"
+
+	# Check whether or not the certificate exists
+	certificate_exists="$(echo "${certificates}" | _certificate_exists)"
+
+	# Check whether or not the certificate is for testing
+	certificate_is_test="$(echo "${certificates}" | _certificate_is_test)"
+
+	# Get domains for certificate
+	certificate_domains="$(echo "${certificates}" | _certificate_domains)"
+fi
+
+# Return received data
+cat <<EOF
+certbot_path:${certbot_path}
+certificate_exists:${certificate_exists}
+certificate_is_test:${certificate_is_test}
+${certificate_domains}
+EOF

cdist/conf/type/__letsencrypt_cert/explorer/certificate-domains

@@ -1,8 +0,0 @@
-#!/bin/sh -e
-
-certbot_path=$("${__type_explorer}/certbot-path")
-if [ -n "${certbot_path}" ]
-then
-	certbot certificates --cert-name "${__object_id:?}" | grep '    Domains: ' | \
-		cut -d ' ' -f 6- | tr ' ' '\n'
-fi

cdist/conf/type/__letsencrypt_cert/explorer/certificate-exists

@@ -1,13 +0,0 @@
-#!/bin/sh -e
-
-certbot_path=$("${__type_explorer}/certbot-path")
-if [ -n "${certbot_path}" ]
-then
-	if certbot certificates | grep -q "  Certificate Name: ${__object_id:?}$"; then
-		echo yes
-	else
-		echo no
-	fi
-else
-	echo no
-fi

cdist/conf/type/__letsencrypt_cert/explorer/certificate-is-test

@@ -1,14 +0,0 @@
-#!/bin/sh -e
-
-certbot_path=$("${__type_explorer}/certbot-path")
-if [ -n "${certbot_path}" ]
-then
-	if certbot certificates --cert-name "${__object_id:?}" | \
-		grep -q 'INVALID: TEST_CERT'; then
-		echo yes
-	else
-		echo no
-	fi
-else
-	echo no
-fi

cdist/conf/type/__letsencrypt_cert/gencode-remote

@@ -1,6 +1,10 @@
 #!/bin/sh -e
 
-certificate_exists=$(cat "${__object:?}/explorer/certificate-exists")
+_explorer_var() {
+	grep "^$1:" "${__object:?}/explorer/certificate-data" | cut -d ':' -f 2-
+}
+
+certificate_exists="$(_explorer_var certificate_exists)"
 name="${__object_id:?}"
 state=$(cat "${__object}/parameter/state")
 
@@ -29,8 +33,9 @@ case "${state}" in
 		fi
 
 		if [ "${certificate_exists}" = "yes" ]; then
-			existing_domains="${__object}/explorer/certificate-domains"
+			existing_domains=$(mktemp "${TMPDIR:-/tmp}/existing_domains.cdist.XXXXXXXXXX")
-			certificate_is_test=$(cat "${__object}/explorer/certificate-is-test")
+			tail -n +4 "${__object:?}/explorer/certificate-data" | grep -v '^$' > "${existing_domains}"
+			certificate_is_test="$(_explorer_var certificate_is_test)"
 
 			sort -uo "${requested_domains}" "${requested_domains}"
 			sort -uo "${existing_domains}" "${existing_domains}"

cdist/conf/type/__letsencrypt_cert/manifest

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-certbot_fullpath="$(cat "${__object:?}/explorer/certbot-path")"
+certbot_fullpath="$(grep "^certbot_path:" "${__object:?}/explorer/certificate-data" | cut -d ':' -f 2-)"
 state=$(cat "${__object}/parameter/state")
 os="$(cat "${__global:?}/explorer/os")"
 

cdist/conf/type/__postgres_conf/explorer/postgres_user

@@ -0,0 +1,64 @@
+#!/bin/sh -e
+# -*- mode: sh; indent-tabs-mode: t -*-
+#
+# 2021 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
+#
+# This file is part of cdist.
+#
+# cdist is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# cdist is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with cdist. If not, see <http://www.gnu.org/licenses/>.
+#
+
+os=$("${__explorer:?}/os")
+
+case ${os}
+in
+	(alpine)
+		echo 'postgres'
+		;;
+	(centos|rhel|scientific)
+		echo 'postgres'
+		;;
+	(debian|devuan|ubuntu)
+		echo 'postgres'
+		;;
+	(freebsd)
+		test -x /usr/local/etc/rc.d/postgresql || {
+			printf 'could not find postgresql rc script./n' >&2
+			exit 1
+		}
+		pg_status=$(/usr/local/etc/rc.d/postgresql onestatus) || {
+			printf 'postgresql daemon is not running.\n' >&2
+			exit 1
+		}
+		pg_pid=$(printf '%s\n' "${pg_status}" \
+			| sed -n 's/^pg_ctl:.*(PID: *\([0-9]*\))$/\1/p')
+
+		# PostgreSQL < 9.6: pgsql
+		# PostgreSQL >= 9.6: postgres
+		ps -o user -p "${pg_pid}" | sed -n '2p'
+		;;
+	(netbsd)
+		echo 'pgsql'
+		;;
+	(openbsd)
+		echo '_postgresql'
+		;;
+	(suse)
+		echo 'postgres'
+		;;
+	(*)
+		echo "Unsupported OS: ${os}" >&2
+		exit 1
+		;;
+esac

cdist/conf/type/__postgres_conf/explorer/state

@@ -0,0 +1,223 @@
+#!/bin/sh -e
+# -*- mode: sh; indent-tabs-mode: t -*-
+#
+# 2021 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
+#
+# This file is part of cdist.
+#
+# cdist is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# cdist is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with cdist. If not, see <http://www.gnu.org/licenses/>.
+#
+
+postgres_user=$("${__type_explorer:?}/postgres_user")
+conf_name=${__object_id:?}
+
+tolower() { printf '%s' "$*" | tr '[:upper:]' '[:lower:]'; }
+
+tobytes() {
+	# NOTE: This function treats everything as base 2.
+	#       It is not compatible with SI units.
+	awk 'BEGIN { FS = "\n" }
+	/TB$/ { $0 = ($0 * 1024) "GB" }
+	/GB$/ { $0 = ($0 * 1024) "MB" }
+	/MB$/ { $0 = ($0 * 1024) "kB" }
+	/kB$/ { $0 = ($0 * 1024) "B" }
+	 /B?$/ { sub(/ *B?$/, "") }
+	($0*1) == $0  # is number
+	' <<-EOF
+	$1
+	EOF
+}
+
+tomillisecs() {
+	awk 'BEGIN { FS = "\n" }
+	    /d$/ { $0 = ($0 * 24) "h" }
+	    /h$/ { $0 = ($0 * 60) "min" }
+	  /min$/ { $0 = ($0 * 60) "s" }
+	/[^m]s$/ { $0 = ($0 * 1000) "ms" }
+	   /ms$/ { $0 *= 1 }
+	($0*1) == $0  # is number
+	' <<-EOF
+	$1
+	EOF
+}
+
+tobool() {
+	# prints either 'on' or 'off'
+	case $(tolower "$1")
+	in
+		(t|true|y|yes|on|1)
+			echo 'on' ;;
+		(f|false|n|no|off|0)
+			echo 'off' ;;
+		(*)
+			printf 'Inavlid bool value: %s\n' "$2" >&2
+			return 1
+			;;
+	esac
+	return 0
+}
+
+quote() { printf '%s\n' "$*" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/'/"; }
+psql_exec() {
+	su - "${postgres_user}" -c "psql postgres -twAc $(quote "$*")"
+}
+
+psql_conf_source() {
+	# NOTE: SHOW/SET are case-insentitive, so this command should also be.
+	psql_exec "SELECT CASE WHEN source = 'default' OR setting = boot_val THEN 'default' ELSE source END FROM pg_settings WHERE lower(name) = lower('$1')"
+}
+psql_conf_cmp() (
+	IFS='|' read -r lower_name vartype setting unit <<-EOF
+	$(psql_exec "SELECT lower(name), vartype, setting, unit FROM pg_settings WHERE lower(name) = lower('$1')")
+	EOF
+
+	should_value=$2
+	is_value=${setting}
+
+	# The following case contains special cases for special settings.
+	case ${lower_name}
+	in
+		(archive_command)
+			if test "${setting}" = '(disabled)'
+			then
+				# DAFUQ PostgreSQL?!
+				# PostgreSQL returns (disabled) if the feature is inactive.
+				# We cannot compare the values unless it is enabled, first.
+				return 0
+			fi
+			;;
+		(archive_mode|backslash_quote|constraint_exclusion|force_parallel_mode|huge_pages|synchronous_commit)
+			# Although only 'on', 'off' are documented, PostgreSQL accepts all
+			# the "likely" variants of "on" and "off".
+			case $(tolower "${should_value}")
+			in
+				(on|off|true|false|yes|no|1|0)
+					should_value=$(tobool "${should_value}")
+					;;
+			esac
+			;;
+	esac
+
+	case ${vartype}
+	in
+		(bool)
+			test -z "${unit}" || {
+				# please fix the explorer if this error occurs.
+				printf 'units are not supported for vartype: %s\n' "${vartype}" >&2
+				exit 1
+			}
+
+			should_value=$(tobool "${should_value}")
+
+			test "${is_value}" = "${should_value}"
+			;;
+		(enum)
+			test -z "${unit}" || {
+				# please fix the explorer if this error occurs.
+				printf 'units are not supported with vartype: %s\n' "${vartype}" >&2
+				exit 1
+			}
+
+			# NOTE: All enums that are currently defined are lower case, but
+			#       PostgreSQL also accepts upper case spelling.
+			should_value=$(tolower "$2")
+
+			test "${is_value}" = "${should_value}"
+			;;
+		(integer)
+			# split multiples from unit, first (e.g. 8kB -> 8, kB)
+			case ${unit}
+			in
+				([0-9]*)
+					multiple=${unit%%[!0-9]*}
+					unit=${unit##*[0-9 ]}
+					;;
+				(*) multiple=1 ;;
+			esac
+
+			is_value=$((setting * multiple))${unit}
+
+			if expr "${should_value}" : '-\{0,1\}[0-9]*$' >/dev/null
+			then
+				# default unit
+				should_value=$((should_value * multiple))${unit}
+			fi
+
+			# then, do conversion
+			# NOTE: these conversions work for integers only!
+			case ${unit}
+			in
+				(B|[kMGT]B)
+					# bytes
+					is_bytes=$(tobytes "${is_value}")
+					should_bytes=$(tobytes "${should_value}")
+
+					test $((is_bytes)) -eq $((should_bytes))
+					;;
+				(ms|s|min|h|d)
+					# seconds
+					is_ms=$(tomillisecs "${is_value}")
+					should_ms=$(tomillisecs "${should_value}")
+
+					test $((is_ms)) -eq $((should_ms))
+					;;
+				('')
+					# no unit
+					is_int=${is_value}
+					should_int=${should_value}
+
+					test $((is_int)) -eq $((should_int))
+					;;
+			esac
+			;;
+		(real|string)
+			# NOTE: reals could possibly have units, but currently there none.
+
+			test -z "${unit}" || {
+				# please fix the explorer if this error occurs.
+				printf 'units are not supported with vartype: %s\n' "${vartype}" >&2
+				exit 1
+			}
+
+			test "${is_value}" = "${should_value}"
+			;;
+	esac
+)
+
+psql_exec 'SELECT 1' >/dev/null || {
+	echo 'Connection to PostgreSQL server failed' >&2
+	exit 1
+}
+
+case $(psql_conf_source "${conf_name}")
+in
+	('')
+		printf 'Invalid configuration parameter: %s\n' "${conf_name}" >&2
+		exit 1
+		;;
+	(default)
+		echo absent
+		;;
+	(*)
+		if ! test -f "${__object:?}/parameter/value"
+		then
+			echo present
+		elif psql_conf_cmp "${conf_name}" "$(cat "${__object:?}/parameter/value")"
+		then
+			echo present
+		else
+			echo different
+		fi
+		;;
+esac

cdist/conf/type/__postgres_conf/gencode-remote

@@ -0,0 +1,123 @@
+#!/bin/sh -e
+# -*- mode: sh; indent-tabs-mode: t -*-
+#
+# 2019-2021 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
+# 2020 Beni Ruef (bernhard.ruef at ssrq-sds-fds.ch)
+#
+# This file is part of cdist.
+#
+# cdist is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# cdist is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with cdist. If not, see <http://www.gnu.org/licenses/>.
+#
+
+state_is=$(cat "${__object:?}/explorer/state")
+state_should=$(cat "${__object:?}/parameter/state")
+postgres_user=$(cat "${__object:?}/explorer/postgres_user")
+
+conf_name=${__object_id:?}
+
+if test "${state_is}" = "${state_should}"
+then
+	exit 0
+fi
+
+quote() {
+	for _arg
+	do
+		shift
+		if test -n "$(printf '%s' "${_arg}" | tr -d -c '\t\n \042-\047\050-\052\073-\077\133\\`|~' | tr -c '' '.')"
+		then
+			# needs quoting
+			set -- "$@" "'$(printf '%s' "${_arg}" | sed -e "s/'/'\\\\''/g")'"
+		else
+			set -- "$@" "${_arg}"
+		fi
+	done
+	unset _arg
+
+	# NOTE: Use printf because POSIX echo interprets escape sequences
+	printf '%s' "$*"
+}
+
+
+psql_cmd() {
+	printf 'su - %s -c %s\n' "$(quote "${postgres_user}")" "$(quote "$(quote psql "$@")")"
+}
+
+case ${state_should}
+in
+	(present)
+		test -n "${__object:?}/parameter/value" || {
+			echo 'Missing required parameter --value' >&2
+			exit 1
+		}
+
+		cat <<-EOF
+		exec 3< "\${__object:?}/parameter/value"
+		$(psql_cmd postgres -tAwq -o /dev/null -v ON_ERROR_STOP=on) <<'SQL'
+		\\set conf_value \`cat <&3\`
+		ALTER SYSTEM SET ${conf_name} = :'conf_value';
+		SELECT pg_reload_conf();
+		SQL
+		exec 3<&-
+		EOF
+		;;
+	(absent)
+		psql_cmd postgres -qwc "ALTER SYSTEM SET ${conf_name} TO DEFAULT"
+		;;
+	(*)
+		printf 'Invalid --state: %s\n' "${state_should}" >&2
+		printf 'Only "present" and "absent" are acceptable.\n' >&2
+		exit 1
+		;;
+esac
+
+# Restart PostgreSQL server if required to apply new configuration value
+cat <<EOF
+
+if test 't' = "\$($(psql_cmd postgres -twAc "SELECT pending_restart FROM pg_settings WHERE lower(name) = lower('${conf_name}')"))"
+then
+	$(
+		init=$(cat "${__global:?}/explorer/init")
+		case ${init}
+		in
+			(systemd)
+				echo 'systemctl restart postgresql.service'
+				;;
+			(*openrc*)
+				echo 'rc-service postgresql restart'
+				;;
+			(sysvinit)
+				echo '/etc/init.d/postgresql restart'
+				;;
+			(init)
+				case $(cat "${__global:?}/explorer/kernel_name")
+				in
+					(FreeBSD)
+						echo '/usr/local/etc/rc.d/postgresql restart'
+						;;
+					(OpenBSD|NetBSD)
+						echo '/etc/rc.d/postgresql restart'
+						;;
+					(*)
+						echo "Unsupported operating system. Don't know how to restart services." >&2
+						exit 1
+				esac
+				;;
+			(*)
+				printf "Don't know how to restart services with your init (%s)\n" "${init}" >&2
+				exit 1
+		esac
+	)
+fi
+EOF

cdist/conf/type/__postgres_conf/man.rst

@@ -0,0 +1,60 @@
+cdist-type__postgres_conf(7)
+============================
+
+NAME
+----
+cdist-type__postgres_conf - Alter PostgreSQL configuration
+
+
+DESCRIPTION
+-----------
+Configure a running PostgreSQL server using ``ALTER SYSTEM``.
+
+
+REQUIRED PARAMETERS
+-------------------
+value
+   The value to set (can be omitted if ``--state`` is set to ``absent``).
+
+
+OPTIONAL PARAMETERS
+-------------------
+state
+   ``present`` or ``absent``.
+   Defaults to ``present``.
+
+
+BOOLEAN PARAMETERS
+------------------
+None.
+
+
+EXAMPLES
+--------
+
+.. code-block:: sh
+
+   # set timezone
+   __postgres_conf timezone --value Europe/Zurich
+
+   # reset maximum number of concurrent connections to default (normally 100)
+   __postgres_conf max_connections --state absent
+
+
+SEE ALSO
+--------
+None.
+
+
+AUTHORS
+-------
+Beni Ruef (bernhard.ruef--@--ssrq-sds-fds.ch)
+Dennis Camera (dennis.camera--@--ssrq-sds-fds.ch)
+
+
+COPYING
+-------
+Copyright \(C) 2019-2021 SSRQ (www.ssrq-sds-fds.ch).
+You can redistribute it and/or modify it under the terms of the GNU General
+Public License as published by the Free Software Foundation, either version 3 of
+the License, or (at your option) any later version.

cdist/conf/type/__postgres_conf/parameter/default/state

@@ -0,0 +1 @@
+present

cdist/conf/type/__postgres_conf/parameter/optional

@@ -0,0 +1,2 @@
+state
+value

cdist/conf/type/__postgres_database/explorer/postgres_user

@@ -0,0 +1 @@
+../../__postgres_conf/explorer/postgres_user

cdist/conf/type/__postgres_database/explorer/state

@@ -1,6 +1,7 @@
 #!/bin/sh
 #
 # 2011 Steven Armstrong (steven-cdist at armstrong.cc)
+# 2021 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
 #
 # This file is part of cdist.
 #
@@ -18,23 +19,16 @@
 # along with cdist. If not, see <http://www.gnu.org/licenses/>.
 #
 
-case "$("${__explorer}/os")"
+postgres_user=$("${__type_explorer:?}/postgres_user")
-in
-    netbsd)
-        postgres_user='pgsql'
-        ;;
-    openbsd)
-        postgres_user='_postgresql'
-        ;;
-    *)
-        postgres_user='postgres'
-        ;;
-esac
 
+dbname=${__object_id:?}
 
-name="$__object_id"
+quote() { printf '%s\n' "$*" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/'/"; }
+psql_exec() {
+	su - "${postgres_user}" -c "psql $(quote "$1") -twAc $(quote "$2")"
+}
 
-if test -n "$(su - "$postgres_user" -c "psql postgres -twAc \"SELECT 1 FROM pg_database WHERE datname='$name'\"")"
+if psql_exec postgres "SELECT datname FROM pg_database" | grep -qFx "${dbname}"
 then
 	echo 'present'
 else

cdist/conf/type/__postgres_database/gencode-remote

@@ -1,6 +1,7 @@
 #!/bin/sh -e
 #
 # 2011 Steven Armstrong (steven-cdist at armstrong.cc)
+# 2021 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
 #
 # This file is part of cdist.
 #
@@ -18,60 +19,63 @@
 # along with cdist. If not, see <http://www.gnu.org/licenses/>.
 #
 
-case "$(cat "${__global}/explorer/os")"
+quote() {
+	for _arg
+	do
+		shift
+		if test -n "$(printf '%s' "${_arg}" | tr -d -c '\t\n \042-\047\050-\052\073-\077\133\\`|~' | tr -c '' '.')"
+		then
+			# needs quoting
+			set -- "$@" "'$(printf '%s' "${_arg}" | sed -e "s/'/'\\\\''/g")'"
+		else
+			set -- "$@" "${_arg}"
+		fi
+	done
+	unset _arg
+
+	# NOTE: Use printf because POSIX echo interprets escape sequences
+	printf '%s' "$*"
+}
+
+postgres_user=$(cat "${__object:?}/explorer/postgres_user")
+
+dbname=${__object_id:?}
+state_should=$(cat "${__object:?}/parameter/state")
+state_is=$(cat "${__object:?}/explorer/state")
+
+if test "${state_should}" = "$state_is"
+then
+	exit 0
+fi
+
+case ${state_should}
 in
-   netbsd)
+	(present)
-      postgres_user='pgsql'
+		set --
+
+		while read -r param_name opt
+		do
+			if test -f "${__object:?}/parameter/${param_name}"
+			then
+				set -- "$@" "${opt}" "$(cat "${__object:?}/parameter/${param_name}")"
+			fi
+		done <<-'EOF'
+		owner -O
+		template --template
+		encoding --encoding
+		lc_collate --lc-collate
+		lc_ctype --lc-ctype
+		EOF
+
+		set -- "$@" "${dbname}"
+
+		cat <<-EOF
+		su - $(quote "${postgres_user}") -c $(quote "$(quote createdb "$@")")
+		EOF
 		;;
-   openbsd)
+	(absent)
-      postgres_user='_postgresql'
+		cat <<-EOF
-      ;;
+		su - $(quote "${postgres_user}") -c $(quote "$(quote dropdb "${dbname}")")
-   *)
+		EOF
-      postgres_user='postgres'
 		;;
 esac
-
-
-name="$__object_id"
-state_should="$(cat "$__object/parameter/state")"
-state_is="$(cat "$__object/explorer/state")"
-
-if [ "$state_should" != "$state_is" ]; then
-   case "$state_should" in
-      present)
-         owner=""
-         if [ -f "$__object/parameter/owner" ]; then
-            owner="-O \"$(cat "$__object/parameter/owner")\""
-         fi
-
-         template=""
-         if [ -f "$__object/parameter/template" ]; then
-            template="--template \"$(cat "$__object/parameter/template")\""
-         fi
-
-         encoding=""
-         if [ -f "$__object/parameter/encoding" ]; then
-            encoding="--encoding \"$(cat "$__object/parameter/encoding")\""
-         fi
-
-         lc_collate=""
-         if [ -f "$__object/parameter/lc-collate" ]; then
-            lc_collate="--lc-collate \"$(cat "$__object/parameter/lc-collate")\""
-         fi
-
-         lc_ctype=""
-         if [ -f "$__object/parameter/lc-ctype" ]; then
-            lc_ctype="--lc-ctype \"$(cat "$__object/parameter/lc-ctype")\""
-         fi
-
-         cat << EOF
-su - '$postgres_user' -c "createdb $owner \"$name\" $template $encoding $lc_collate $lc_ctype"
-EOF
-      ;;
-      absent)
-         cat << EOF
-su - '$postgres_user' -c "dropdb \"$name\""
-EOF
-      ;;
-   esac
-fi

cdist/conf/type/__postgres_extension/explorer/postgres_user

@@ -0,0 +1 @@
+../../__postgres_conf/explorer/postgres_user

cdist/conf/type/__postgres_extension/explorer/state

@@ -0,0 +1,41 @@
+#!/bin/sh -e
+# -*- mode: sh; indent-tabs-mode: t -*-
+#
+# 2021 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
+#
+# This file is part of cdist.
+#
+# cdist is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# cdist is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with cdist. If not, see <http://www.gnu.org/licenses/>.
+#
+# Prints "present" if the extension is currently installed.
+# "absent" otherwise.
+
+quote() { printf '%s\n' "$*" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/'/"; }
+
+postgres_user=$("${__type_explorer:?}/postgres_user")
+
+IFS=: read -r dbname extname <<EOF
+${__object_id:?}
+EOF
+
+psql_exec() {
+	su - "${postgres_user}" -c "psql $(quote "$1") -twAc $(quote "$2")"
+}
+
+if psql_exec "${dbname}" 'SELECT extname FROM pg_extension' | grep -qFx "${extname}"
+then
+	echo present
+else
+	echo absent
+fi

cdist/conf/type/__postgres_extension/gencode-remote

@@ -2,9 +2,10 @@
 #
 # 2011 Steven Armstrong (steven-cdist at armstrong.cc)
 # 2013 Tomas Pospisek (tpo_deb at sourcepole.ch)
+# 2021 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
 #
 # This type was created by Tomas Pospisek based on the
-#__postgres_role type by Steven Armstrong
+# __postgres_role type by Steven Armstrong.
 #
 # This file is part of cdist.
 #
@@ -22,32 +23,38 @@
 # along with cdist. If not, see <http://www.gnu.org/licenses/>.
 #
 
-case "$(cat "${__global}/explorer/os")"
+postgres_user=$(cat "${__object:?}/explorer/postgres_user")
+
+quote() { printf '%s\n' "$*" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/'/"; }
+psql_cmd() {
+	printf 'su - %s -c %s\n' \
+		"$(quote "${postgres_user}")" \
+		"$(quote psql "$(quote "$1")" -c "$(quote "$2")")"
+}
+
+
+IFS=: read -r dbname extname <<EOF
+${__object_id:?}
+EOF
+
+state_is=$(cat "${__object:?}/explorer/state")
+state_should=$(cat "${__object:?}/parameter/state")
+
+if test "${state_is}" = "${state_should}"
+then
+	exit 0
+fi
+
+case ${state_should}
 in
-   netbsd)
+	(present)
-      postgres_user='pgsql'
+		psql_cmd "${dbname}" "CREATE EXTENSION ${extname}"
 		;;
-   openbsd)
+	(absent)
-      postgres_user='_postgresql'
+		psql_cmd "${dbname}" "DROP EXTENSION ${extname}"
 		;;
-   *)
+	(*)
-      postgres_user='postgres'
+		printf 'Invalid --state: %s\n' "${state_should}" >&2
-      ;;
+		exit 1
-esac
-
-
-dbname=$(    echo "$__object_id" | cut -d":" -f1 )
-extension=$( echo "$__object_id" | cut -d":" -f2 )
-
-state_should=$( cat "$__object/parameter/state" )
-
-case "$state_should" in
-    present)
-         cmd="CREATE EXTENSION IF NOT EXISTS $extension"
-         echo "su - '$postgres_user' -c 'psql -c \"$cmd\" \"$dbname\"'"
-    ;;
-    absent)
-         cmd="DROP EXTENSION IF EXISTS $extension"
-         echo "su - '$postgres_user' -c 'psql -c \"$cmd\" \"$dbname\"'"
 		;;
 esac

cdist/conf/type/__postgres_extension/man.rst

@@ -3,32 +3,36 @@ cdist-type__postgres_extension(7)
 
 NAME
 ----
-cdist-type__postgres_extension - manage postgres extensions
+cdist-type__postgres_extension - Manage PostgreSQL extensions
 
 
 DESCRIPTION
 -----------
-This cdist type allows you to create or drop postgres extensions.
+This cdist type allows you to manage PostgreSQL extensions.
 
-The object you need to pass to __postgres_extension consists of
+The ``__object_id`` to pass to ``__postgres_extension`` is of the form
-the database name and the extension name joined by a colon in the
+``dbname:extension``, e.g.:
-following form:
-
-.. code-block:: sh
-
-    dbname:extension
-
-f.ex.
 
 .. code-block:: sh
 
     rails_test:unaccent
 
 
+**CAUTION!** Be careful when installing extensions from (untrusted) third-party
+sources:
+
+   | Installing an extension as superuser requires trusting that the extension's
+     author wrote the extension installation script in a secure fashion. It is
+     not terribly difficult for a malicious user to create trojan-horse objects
+     that will compromise later execution of a carelessly-written extension
+     script, allowing that user to acquire superuser privileges.
+   | – `<https://www.postgresql.org/docs/13/sql-createextension.html#id-1.9.3.64.7>`_
+
+
 OPTIONAL PARAMETERS
 -------------------
 state
-    either "present" or "absent", defaults to "present"
+    either ``present`` or ``absent``, defaults to ``present``.
 
 
 EXAMPLES
@@ -36,24 +40,29 @@ EXAMPLES
 
 .. code-block:: sh
 
+   # Install extension unaccent into database rails_test
    __postgres_extension rails_test:unaccent
-    __postgres_extension --present rails_test:unaccent
+
-    __postgres_extension --absent  rails_test:unaccent
+   # Drop extension unaccent from database fails_test
+   __postgres_extension rails_test:unaccent --state absent
 
 
 SEE ALSO
 --------
-:strong:`cdist-type__postgre_database`\ (7)
+- :strong:`cdist-type__postgres_database`\ (7)
+- PostgreSQL "CREATE EXTENSION" documentation at:
+  `<http://www.postgresql.org/docs/current/static/sql-createextension.html>`_.
 
-Postgres "Create Extension" documentation at: <http://www.postgresql.org/docs/current/static/sql-createextension.html>.
 
-AUTHOR
+AUTHORS
 -------
-Tomas Pospisek <tpo_deb--@--sourcepole.ch>
+| Tomas Pospisek <tpo_deb--@--sourcepole.ch>
+| Dennis Camera <dennis.camera--@--ssrq-sds-fds.ch>
+
 
 COPYING
 -------
-Copyright \(C) 2014 Tomas Pospisek. You can redistribute it
+Copyright \(C) 2014 Tomas Pospisek, 2021 Dennis Camera.
-and/or modify it under the terms of the GNU General Public License as
+You can redistribute it and/or modify it under the terms of the GNU General
-published by the Free Software Foundation, either version 3 of the
+Public License as published by the Free Software Foundation, either version 3 of
-License, or (at your option) any later version.
+the License, or (at your option) any later version.

cdist/conf/type/__postgres_role/explorer/postgres_user

@@ -0,0 +1 @@
+../../__postgres_conf/explorer/postgres_user

cdist/conf/type/__postgres_role/explorer/state

@@ -19,19 +19,7 @@
 # along with cdist. If not, see <http://www.gnu.org/licenses/>.
 #
 
-case $("${__explorer:?}/os")
+postgres_user=$("${__type_explorer:?}/postgres_user")
-in
-	(netbsd)
-		postgres_user='pgsql'
-		;;
-	(openbsd)
-		postgres_user='_postgresql'
-		;;
-	(*)
-		postgres_user='postgres'
-		;;
-esac
-
 rolename=${__object_id:?}
 
 
@@ -55,8 +43,7 @@ role_properties=$(
 	  BEGIN { RS = "\036"; FS = "\034" }
 	  /^\([0-9]+ rows?\)/ { exit }
 	  NR == 1 { for (i = 1; i <= NF; i++) cols[i] = $i; next }
-	  NR == 2 { for (i = 1; i <= NF; i++) printf "%s=%s\n", cols[i], $i }
+	  NR == 2 { for (i = 1; i <= NF; i++) printf "%s=%s\n", cols[i], $i }'
-	  '
 )
 
 if test -n "${role_properties}"
@@ -90,12 +77,10 @@ then
 	# Check password
 	passwd_stored=$(
 		psql_query "SELECT rolpassword FROM pg_authid WHERE rolname = '${rolename}'" \
-		| awk 'BEGIN { RS = "\036" } NR == 2'
+		| awk 'BEGIN { RS = "\036" } NR == 2 { printf "%s.", $0 }')
-		printf .
+	passwd_stored=${passwd_stored%.}
-	)
-	passwd_stored=${passwd_stored%?.}
 
-	if test -f "${__object:?}/parameter/password"
+	if test -s "${__object:?}/parameter/password"
 	then
 		passwd_should=$(cat "${__object:?}/parameter/password"; printf .)
 	fi

cdist/conf/type/__postgres_role/gencode-remote

@@ -28,20 +28,7 @@ quote() {
 	fi | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/'/"
 }
 
-case $(cat "${__global:?}/explorer/os")
+postgres_user=$(cat "${__object:?}/explorer/postgres_user")
-in
-	(netbsd)
-		postgres_user='pgsql'
-		;;
-	(openbsd)
-		postgres_user='_postgresql'
-		;;
-	(*)
-		postgres_user='postgres'
-		;;
-esac
-
-
 rolename=${__object_id:?}
 state_is=$(cat "${__object:?}/explorer/state")
 state_should=$(cat "${__object:?}/parameter/state")
@@ -59,7 +46,7 @@ psql_query() {
 
 psql_set_password() {
 	# NOTE: Always make sure that the password does not end up in psql_history!
-	# NOTE: Never set an empty string as the password, because they can be
+	# NOTE: Never set an empty string as the password, because it can be
 	#       interpreted differently by different tooling.
 	if test -s "${__object:?}/parameter/password"
 	then

cdist/conf/type/__pyvenv/explorer/group

@@ -14,6 +14,11 @@ then
 	then
 		printf '%u\n' "${group_gid}"
 	else
-		printf '%s\n' "$(id -u -n "${group_gid}")"
+		if command -v getent >/dev/null 2>&1
+		then
+			getent group "${group_gid}" | cut -d : -f 1
+		else
+			awk -F: -v gid="${group_gid}" '$3 == gid { print $1 }' /etc/group
+		fi
 	fi
 fi

cdist/conf/type/__rsync/gencode-local

@@ -34,6 +34,8 @@ if [ -f "$__object/parameter/rsync-opts" ]; then
     done < "$__object/parameter/rsync-opts"
 fi
 
+# shellcheck disable=SC2086
 echo rsync -a \
     --no-owner --no-group \
+    -e \"${__remote_exec}\" \
     -q "$@" "${source}/" "${remote_user}@${__target_host}:${destination}"

cdist/conf/type/__snakeoil_cert/explorer/ssl-cert-group

@@ -0,0 +1,8 @@
+#!/bin/sh -e
+
+if grep -Eq '^ssl-cert:' /etc/group
+then
+    echo 'present'
+else
+    echo 'absent'
+fi

cdist/conf/type/__snakeoil_cert/explorer/state

@@ -0,0 +1,24 @@
+#!/bin/sh -e
+
+key_path="$( cat "$__object/parameter/key-path" )"
+
+if echo "$key_path" | grep -Fq '%s'
+then
+    # shellcheck disable=SC2059
+    key_path="$( printf "$key_path" "$__object_id" )"
+fi
+
+cert_path="$( cat "$__object/parameter/cert-path" )"
+
+if echo "$cert_path" | grep -Fq '%s'
+then
+    # shellcheck disable=SC2059
+    cert_path="$( printf "$cert_path" "$__object_id" )"
+fi
+
+if [ ! -f "$key_path" ] || [ ! -f "$cert_path" ]
+then
+    echo 'absent'
+else
+    echo 'present'
+fi

cdist/conf/type/__snakeoil_cert/gencode-remote

@@ -0,0 +1,73 @@
+#!/bin/sh -e
+
+state="$( cat "$__object/explorer/state" )"
+
+if [ "$state" = 'present' ]
+then
+    exit 0
+fi
+
+if [ -f "$__object/parameter/common-name" ]
+then
+    common_name="$( cat "$__object/parameter/common-name" )"
+else
+    common_name="$__object_id"
+fi
+
+key_path="$( cat "$__object/parameter/key-path" )"
+
+if echo "$key_path" | grep -Fq '%s'
+then
+    # shellcheck disable=SC2059
+    key_path="$( printf "$key_path" "$__object_id" )"
+fi
+
+cert_path="$( cat "$__object/parameter/cert-path" )"
+
+if echo "$cert_path" | grep -Fq '%s'
+then
+    # shellcheck disable=SC2059
+    cert_path="$( printf "$cert_path" "$__object_id" )"
+fi
+
+key_type="$( cat "$__object/parameter/key-type" )"
+
+key_type_arg="$( echo "$key_type" | cut -d : -f 2 )"
+
+case "$key_type" in
+    rsa:*)
+        echo "openssl genrsa -out '$key_path' $key_type_arg"
+    ;;
+    ec:*)
+        echo "openssl ecparam -name $key_type_arg -genkey -noout -out '$key_path'"
+    ;;
+esac
+
+# shellcheck disable=SC2016
+echo 'csr_path="$( mktemp )"'
+
+echo "openssl req -new -subj '/CN=$common_name' -key '$key_path' -out \"\$csr_path\""
+
+echo "openssl x509 -req -sha256 -days 3650 -in \"\$csr_path\" -signkey '$key_path' -out '$cert_path'"
+
+# shellcheck disable=SC2016
+echo 'rm -f "$csr_path"'
+
+if [ "$( cat "$__object/explorer/ssl-cert-group" )" = 'present' ]
+then
+    key_group='ssl-cert'
+else
+    key_group='root'
+fi
+
+echo "chmod 640 '$key_path'"
+
+echo "chown root '$key_path'"
+
+echo "chgrp $key_group '$key_path'"
+
+echo "chmod 644 '$cert_path'"
+
+echo "chown root '$cert_path'"
+
+echo "chgrp root '$cert_path'"

cdist/conf/type/__snakeoil_cert/man.rst

@@ -0,0 +1,60 @@
+cdist-type__snakeoil_cert(7)
+============================
+
+NAME
+----
+cdist-type__snakeoil_cert - Generate self-signed certificate
+
+
+DESCRIPTION
+-----------
+The purpose of this type is to generate **self-signed** certificate and private key
+for **testing purposes**. Certificate will expire in 3650 days.
+
+Certificate's and key's access bits will be ``644`` and ``640`` respectively.
+If target system has ``ssl-cert`` group, then it will be used as key's group.
+Use ``require='__snakeoil_cert/...' __file ...`` to override.
+
+
+OPTIONAL PARAMETERS
+-------------------
+common-name
+   Defaults to ``$__object_id``.
+
+key-path
+   ``%s`` in path will be replaced with ``$__object_id``.
+   Defaults to ``/etc/ssl/private/%s.pem``.
+
+key-type
+   Possible values are ``rsa:$bits`` and ``ec:$name``.
+   For possible EC names see ``openssl ecparam -list_curves``.
+   Defaults to ``rsa:2048``.
+
+cert-path
+   ``%s`` in path will be replaced with ``$__object_id``.
+   Defaults to ``/etc/ssl/certs/%s.pem``.
+
+
+EXAMPLES
+--------
+.. code-block:: sh
+	__snakeoil_cert localhost-rsa \
+	    --common-name localhost \
+	    --key-type rsa:4096
+
+	__snakeoil_cert localhost-ec \
+	    --common-name localhost \
+	    --key-type ec:prime256v1
+
+
+AUTHORS
+-------
+Ander Punnar <ander-at-kvlt-dot-ee>
+
+
+COPYING
+-------
+Copyright \(C) 2021 Ander Punnar. You can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the Free
+Software Foundation, either version 3 of the License, or (at your option)
+any later version.

cdist/conf/type/__snakeoil_cert/parameter/default/cert-path

@@ -0,0 +1 @@
+/etc/ssl/certs/%s.pem

cdist/conf/type/__snakeoil_cert/parameter/default/key-path

@@ -0,0 +1 @@
+/etc/ssl/private/%s.pem

cdist/conf/type/__snakeoil_cert/parameter/default/key-type

@@ -0,0 +1 @@
+rsa:2048

cdist/conf/type/__snakeoil_cert/parameter/optional

@@ -0,0 +1,4 @@
+common-name
+key-path
+key-type
+cert-path

cdist/scan/commandline.py

@@ -20,36 +20,98 @@
 #
 
 import logging
+import sys
+from datetime import datetime
 
 log = logging.getLogger("scan")
 
 
-# define this outside of the class to not handle scapy import errors by default
+def run(scan, args):
-def commandline(args):
+    # We run each component in a separate process since they
-    log.debug(args)
+    # must not block on each other.
-
-    try:
-        import cdist.scan.scan as scan
-    except ModuleNotFoundError:
-        print('cdist scan requires scapy to be installed')
-
     processes = []
 
-    if not args.mode:
-        # By default scan and trigger, but do not call any action
-        args.mode = ['scan', 'trigger', ]
-
     if 'trigger' in args.mode:
-        t = scan.Trigger(interfaces=args.interfaces)
+        t = scan.Trigger(interfaces=args.interface,
+                         sleeptime=args.trigger_delay)
         t.start()
         processes.append(t)
         log.debug("Trigger started")
 
     if 'scan' in args.mode:
-        s = scan.Scanner(interfaces=args.interfaces, args=args)
+        s = scan.Scanner(
+                autoconfigure='config' in args.mode,
+                interfaces=args.interface,
+                name_mapper=args.name_mapper)
         s.start()
         processes.append(s)
         log.debug("Scanner started")
 
     for process in processes:
         process.join()
+
+
+def list(scan, args):
+    s = scan.Scanner(interfaces=args.interface, name_mapper=args.name_mapper)
+    hosts = s.list()
+
+    # A full IPv6 addresses id composed of 8 blocks of 4 hexa chars +
+    # 6 colons.
+    ipv6_max_size = 8 * 4 + 10
+    date_max_size = len(datetime.now().strftime(scan.datetime_format))
+    name_max_size = 25
+
+    print("{} | {} | {} | {}".format(
+        'name'.ljust(name_max_size),
+        'address'.ljust(ipv6_max_size),
+        'last seen'.ljust(date_max_size),
+        'last configured'.ljust(date_max_size)))
+    print('=' * (name_max_size + 3 + ipv6_max_size + 2 * (3 + date_max_size)))
+    for host in hosts:
+        last_seen = host.last_seen()
+        if last_seen:
+            last_seen = last_seen.strftime(scan.datetime_format)
+        else:
+            last_seen = '-'
+
+        last_configured = host.last_configured()
+        if last_configured is not None:
+            last_configured = last_configured.strftime(scan.datetime_format)
+        else:
+            last_configured = '-'
+
+        print("{} | {} | {} | {}".format(
+            host.name(default='-').ljust(name_max_size),
+            host.address().ljust(ipv6_max_size),
+            last_seen.ljust(date_max_size),
+            last_configured.ljust(date_max_size)))
+
+
+# CLI processing is defined outside of the main scan class to handle
+# non-available optional scapy dependency (instead of crashing mid-flight).
+def commandline(args):
+    log.debug(args)
+
+    # Check if we have the optional scapy dependency available.
+    try:
+        import cdist.scan.scan as scan
+    except ModuleNotFoundError:
+        log.error('cdist scan requires scapy to be installed. Exiting.')
+        sys.exit(1)
+
+    # Set default operation mode.
+    if not args.mode:
+        # By default scan and trigger, but do not call any action.
+        args.mode = ['scan', 'trigger', ]
+
+    if 'config' in args.mode and args.name_mapper is None:
+        print('--name-mapper must be specified for scanner config mode.',
+              file=sys.stderr)
+        sys.exit(1)
+
+    # Print known hosts and exit is --list is specified - do not start
+    # the scanner.
+    if args.list:
+        list(scan, args)
+    else:
+        run(scan, args)

cdist/scan/scan.py

@@ -19,38 +19,6 @@
 #
 #
 
-#
-# Interface to be implemented:
-# - cdist scan --mode {scan, trigger, install, config}, --mode can be repeated
-#   scan: scan / listen for icmp6 replies
-#   trigger: send trigger to multicast
-#   config: configure newly detected hosts
-#   install: install newly detected hosts
-#
-# Scanner logic
-#  - save results to configdir:
-#     basedir = ~/.cdist/scan/<ipv6-address>
-#     last_seen = ~/.cdist/scan/<ipv6-address>/last_seen -- record unix time
-#           or similar
-#     last_configured = ~/.cdist/scan/<ipv6-address>/last_configured -- record
-#           unix time or similar
-#     last_installed = ~/.cdist/scan/<ipv6-address>/last_configured -- record
-#           unix time or similar
-#
-#
-#
-#
-# cdist scan --list
-#       Show all known hosts including last seen flag
-#
-# Logic for reconfiguration:
-#
-#  - record when configured last time
-#  - introduce a parameter --reconfigure-after that takes time argument
-#  - reconfigure if a) host alive and b) reconfigure-after time passed
-#
-
-
 from multiprocessing import Process
 import os
 import logging
@@ -61,7 +29,84 @@ import datetime
 
 import cdist.config
 
+logging.basicConfig(level=logging.DEBUG)
 log = logging.getLogger("scan")
+datetime_format = '%Y-%m-%d %H:%M:%S'
+
+
+class Host(object):
+    def __init__(self, addr, outdir, name_mapper=None):
+        self.addr = addr
+        self.workdir = os.path.join(outdir, addr)
+        self.name_mapper = name_mapper
+
+        os.makedirs(self.workdir, exist_ok=True)
+
+    def __get(self, key, default=None):
+        fname = os.path.join(self.workdir, key)
+        value = default
+        if os.path.isfile(fname):
+            with open(fname, "r") as fd:
+                value = fd.readline()
+        return value
+
+    def __set(self, key, value):
+        fname = os.path.join(self.workdir, key)
+        with open(fname, "w") as fd:
+            fd.write(f"{value}")
+
+    def name(self, default=None):
+        if self.name_mapper is None:
+            return default
+
+        fpath = os.path.join(os.getcwd(), self.name_mapper)
+        if os.path.isfile(fpath) and os.access(fpath, os.X_OK):
+            out = subprocess.run([fpath, self.addr], capture_output=True)
+            if out.returncode != 0:
+                return default
+            else:
+                value = out.stdout.decode()
+                return (default if len(value) == 0 else value)
+        else:
+            return default
+
+    def address(self):
+        return self.addr
+
+    def last_seen(self, default=None):
+        raw = self.__get('last_seen')
+        if raw:
+            return datetime.datetime.strptime(raw, datetime_format)
+        else:
+            return default
+
+    def last_configured(self, default=None):
+        raw = self.__get('last_configured')
+        if raw:
+            return datetime.datetime.strptime(raw, datetime_format)
+        else:
+            return default
+
+    def seen(self):
+        now = datetime.datetime.now().strftime(datetime_format)
+        self.__set('last_seen', now)
+
+    # XXX: There's no easy way to use the config module without feeding it with
+    # CLI args. Might as well call everything from scratch!
+    def configure(self):
+        target = self.name() or self.address()
+        cmd = ['cdist', 'config', '-v', target]
+
+        fname = os.path.join(self.workdir, 'last_configuration_log')
+        with open(fname, "w") as fd:
+            log.debug("Executing: %s", cmd)
+            completed_process = subprocess.run(cmd, stdout=fd, stderr=fd)
+            if completed_process.returncode != 0:
+                log.error("%s return with non-zero code %i - see %s for \
+                        details.", cmd, completed_process.returncode, fname)
+
+        now = datetime.datetime.now().strftime(datetime_format)
+        self.__set('last_configured', now)
 
 
 class Trigger(object):
@@ -69,12 +114,14 @@ class Trigger(object):
     Trigger an ICMPv6EchoReply from all hosts that are alive
     """
 
-    def __init__(self, interfaces=None, verbose=False):
+    def __init__(self, interfaces, sleeptime, verbose=False):
         self.interfaces = interfaces
+
+        # Used by scapy / send in trigger/2.
         self.verbose = verbose
 
-        # Wait 5 seconds before triggering again - FIXME: add parameter
+        # Delay in seconds between sent ICMPv6EchoRequests.
-        self.sleeptime = 5
+        self.sleeptime = sleeptime
 
     def start(self):
         self.processes = []
@@ -93,9 +140,14 @@ class Trigger(object):
             time.sleep(self.sleeptime)
 
     def trigger(self, interface):
-        packet = IPv6(dst="ff02::1{}".format(interface)) / ICMPv6EchoRequest()
+        try:
-        log.debug("Sending request on %s", interface)
+            log.debug("Sending ICMPv6EchoRequest on %s", interface)
+            packet = IPv6(
+                    dst="ff02::1%{}".format(interface)
+                    ) / ICMPv6EchoRequest()
             send(packet, verbose=self.verbose)
+        except Exception as e:
+            log.error("Could not send ICMPv6EchoRequest: %s", e)
 
 
 class Scanner(object):
@@ -103,41 +155,62 @@ class Scanner(object):
     Scan for replies of hosts, maintain the up-to-date database
     """
 
-    def __init__(self, interfaces=None, args=None, outdir=None):
+    def __init__(self, interfaces, autoconfigure=False, outdir=None,
+                 name_mapper=None):
         self.interfaces = interfaces
+        self.autoconfigure = autoconfigure
+        self.name_mapper = name_mapper
+        self.config_delay = datetime.timedelta(seconds=3600)
 
         if outdir:
             self.outdir = outdir
         else:
             self.outdir = os.path.join(os.environ['HOME'], '.cdist', 'scan')
+        os.makedirs(self.outdir, exist_ok=True)
+
+        self.running_configs = {}
 
     def handle_pkg(self, pkg):
         if ICMPv6EchoReply in pkg:
-            host = pkg['IPv6'].src
+            host = Host(pkg['IPv6'].src, self.outdir, self.name_mapper)
-            log.verbose("Host %s is alive", host)
+            if host.name():
+                log.verbose("Host %s (%s) is alive", host.name(),
+                            host.address())
+            else:
+                log.verbose("Host %s is alive", host.address())
 
-            dir = os.path.join(self.outdir, host)
+            host.seen()
-            fname = os.path.join(dir, "last_seen")
 
-            now = datetime.datetime.now()
+            # Configure if needed.
+            if self.autoconfigure and \
+                    host.last_configured(default=datetime.datetime.min) + \
+                    self.config_delay < datetime.datetime.now():
+                self.config(host)
 
-            os.makedirs(dir, exist_ok=True)
+    def list(self):
+        hosts = []
+        for addr in os.listdir(self.outdir):
+            hosts.append(Host(addr, self.outdir, self.name_mapper))
 
-            # FIXME: maybe adjust the format so we can easily parse again
+        return hosts
-            with open(fname, "w") as fd:
-                fd.write(f"{now}\n")
 
-    def config(self):
+    def config(self, host):
-        """
+        if host.name() is None:
-        Configure a host
+            log.debug("config - could not resolve name for %s, aborting.",
+                      host.address())
+            return
 
-        - Assume we are only called if necessary
+        previous_config_process = self.running_configs.get(host.name())
-        - However we need to ensure to not run in parallel
+        if previous_config_process is not None and \
-        - Maybe keep dict storing per host processes
+                previous_config_process.is_alive():
-        - Save the result
+            log.debug("config - is already running for %s, aborting.",
-        - Save the output -> probably aligned to config mode
+                      host.name())
 
-        """
+        log.info("config - running against host %s (%s).", host.name(),
+                 host.address())
+        p = Process(target=host.configure())
+        p.start()
+        self.running_configs[host.name()] = p
 
     def start(self):
         self.process = Process(target=self.scan)
@@ -148,47 +221,9 @@ class Scanner(object):
 
     def scan(self):
         log.debug("Scanning - zzzzz")
+        try:
             sniff(iface=self.interfaces,
                   filter="icmp6",
                   prn=self.handle_pkg)
-
+        except Exception as e:
-
+            log.error("Could not start listener: %s", e)
-if __name__ == '__main__':
-    t = Trigger(interfaces=["wlan0"])
-    t.start()
-
-    # Scanner can listen on many interfaces at the same time
-    s = Scanner(interfaces=["wlan0"])
-    s.scan()
-
-    # Join back the trigger processes
-    t.join()
-
-    # Test in my lan shows:
-    # [18:48] bridge:cdist% ls -1d fe80::*
-    # fe80::142d:f0a5:725b:1103
-    # fe80::20d:b9ff:fe49:ac11
-    # fe80::20d:b9ff:fe4c:547d
-    # fe80::219:d2ff:feb2:2e12
-    # fe80::21b:fcff:feee:f446
-    # fe80::21b:fcff:feee:f45c
-    # fe80::21b:fcff:feee:f4b1
-    # fe80::21b:fcff:feee:f4ba
-    # fe80::21b:fcff:feee:f4bc
-    # fe80::21b:fcff:feee:f4c1
-    # fe80::21d:72ff:fe86:46b
-    # fe80::42b0:34ff:fe6f:f6f0
-    # fe80::42b0:34ff:fe6f:f863
-    # fe80::42b0:34ff:fe6f:f9b2
-    # fe80::4a5d:60ff:fea1:e55f
-    # fe80::77a3:5e3f:82cc:f2e5
-    # fe80::9e93:4eff:fe6c:c1f4
-    # fe80::ba69:f4ff:fec5:6041
-    # fe80::ba69:f4ff:fec5:8db7
-    # fe80::bad8:12ff:fe65:313d
-    # fe80::bad8:12ff:fe65:d9b1
-    # fe80::ce2d:e0ff:fed4:2611
-    # fe80::ce32:e5ff:fe79:7ea7
-    # fe80::d66d:6dff:fe33:e00
-    # fe80::e2ff:f7ff:fe00:20e6
-    # fe80::f29f:c2ff:fe7c:275e

docs/changelog

@@ -5,6 +5,20 @@ next:
 	* Core: Add trigger functionality (Nico Schottelius, Darko Poljak)
 	* Core: Implement core support for python types (Darko Poljak)
 
+6.9.7: 2021-07-10
+	* New type: __postgres_conf (Beni Ruef, Dennis Camera)
+	* Types __postgres_*: Improve OS support and do some cleanup (Dennis Camera)
+	* Type __apt_key_uri: Deprecate in favour of __apt_key --uri (Evilham)
+	* Type __apt_key: Documentation improvements, support in-type/in-manifest provision with --source, make fallback to apt-key(8) explicit with --use-deprecated-apt-key (Evilham)
+	* Type __letsencrypt_cert: Bugfix, performance; revamp explorers, add locking (Evilham)
+	* Type __git: Fix group explorer (Ander Punnar)
+	* Type __pyvenv: Fix group explorer (Dennis Camera)
+	* Type __download: Improve checksum verification, add optional --destination (Ander Punnar)
+	* Type __debconf_set_selections: Add state explorer (Dennis Camera)
+	* Core: Implement usable cdist scan (Timothée Floure)
+	* New type: __snakeoil_cert (Ander Punnar)
+	* Type __rsync: Honour $__remote_exec env var (Daniel Fancsali)
+
 6.9.6: 2021-04-20
 	* Type __pyvenv: Fix user example in man page (Dennis Camera)
 	* Core: config: Make local state directory available to custom remotes (Steven Armstrong

docs/src/cdist-scan.rst

@@ -0,0 +1,82 @@
+Scan
+=====
+
+Description
+-----------
+Runs cdist as a daemon that discover/watch on hosts and reconfigure them
+periodically. It is especially useful in netboot-based environment where hosts
+boot unconfigured, and to ensure your infrastructure stays in sync with your
+configuration.
+
+This feature is still consider to be in **beta** stage, and only operate on
+IPv6 (including link-local).
+
+Usage (Examples)
+----------------
+
+Discover hosts on local network and configure those whose name is resolved by
+the name mapper script.
+
+.. code-block:: sh
+
+    $ cdist scan --beta --interface eth0 \
+      --mode scan --name-mapper path/to/script \
+      --mode trigger --mode config
+
+List known hosts and exit.
+
+.. code-block:: sh
+
+    $ cdist scan --beta --list --name-mapper path/to/script
+
+Please refer to `cdist(1)` for a detailed list of parameters.
+
+Modes
+-----
+
+The scanner has 3 modes that can be independently toggled. If the `--mode`
+parameter is not specified, only `tigger` and `scan` are enabled (= hosts are
+not configured).
+
+trigger
+  Send ICMPv6 requests to specific hosts or broadcast over IPv6 link-local to
+  trigger detection by the `scan` module.
+
+scan
+  Watch for incoming ICMPv6 replies and optionally configure detected hosts.
+
+config
+  Enable configuration of hosts detected by `scan`.
+
+Name Mapper Script
+------------------
+
+The name mapper script takes an IPv6 address as first argument and writes the
+resolved name to stdout - if any. The script must be executable.
+
+Simplest script:
+
+.. code-block:: sh
+  #!/bin/sh
+
+  case "$1" in
+  	"fe80::20d:b9ff:fe57:3524")
+  		printf "my-host-01"
+  		;;
+  	"fe80::7603:bdff:fe05:89bb")
+  		printf "my-host-02"
+  		;;
+  esac
+
+Resolving name from `PTR` DNS record:
+
+.. code-block:: sh
+  #!/bin/sh
+
+  for cmd in dig sed; do
+  	if ! command -v $cmd > /dev/null; then
+  		exit 1
+  	fi
+  done
+
+  dig +short -x "$1" | sed -e 's/.$//'

docs/src/index.rst

@@ -35,6 +35,7 @@ It natively supports IPv6 since the first release.
    cdist-inventory
    cdist-trigger
    cdist-preos
+   cdist-scan
    cdist-integration
    cdist-reference
    cdist-best-practice

docs/src/man1/cdist.rst

@@ -97,6 +97,8 @@ SYNOPSIS
                   [-R [{tar,tgz,tbz2,txz}]] [-r REMOTE_OUT_PATH]
                   [--remote-copy REMOTE_COPY] [--remote-exec REMOTE_EXEC]
                   [-S] [-D DIRECTORY] [-H HTTP_PORT] [--ipv6] [-O SOURCE]
+    cdist scan -I INTERFACE [--m MODE] [--name-mapper PATH_TO_SCRIPT] [--list]
+               [-d CONFIG_DELAY] [-t TRIGGER_DELAY]
 
 
 DESCRIPTION
@@ -748,6 +750,31 @@ This command returns the following response codes to client requests:
 **-S, --disable-saving-output-streams**
     Disable saving output streams.
 
+SCAN
+----
+
+Runs cdist as a daemon that discover/watch on hosts and reconfigure them
+periodically.
+
+**-I INTERFACE, --interfaces INTERFACE**
+    Interface to listen on. Can be specified multiple times.
+
+**-m MODE, --mode MODE**
+    Scanner components to enable. Can be specified multiple time to enable more
+    than one component. Supported modes are: scan, trigger and config. Defaults
+    to tiggger and scan.
+
+**--name-mapper PATH_TO_SCRIPT**
+    Path to script used to resolve a remote host name from an IPv6 address.
+
+**--list**
+    List known hosts and exit.
+
+**-d CONFIG_DELAY, --config-delay CONFIG_DELAY**
+    How long (seconds) to wait before reconfiguring after last try (config mode only).
+
+**-t TRIGGER_DELAY, --tigger-delay TRIGGER_DELAY**
+    How long (seconds) to wait between ICMPv6 echo requests (trigger mode only).
 
 CONFIGURATION
 -------------