Merge tag '0.6.1' into debian

release 0.6.1

12 files changed, 911 insertions, 92 deletions

diff --git a/GPL-3 b/GPL-3
new file mode 100644
index 0000000..94a9ed0
--- /dev/null
+++ b/GPL-3
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
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+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program 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.
+
+    This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..4c75e26
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,24 @@
+# Copyright (C) 2014 Timo Weingärtner <timo@tiwe.de>
+#
+# This file is part of openssh-known-hosts.
+#
+# openssh-known-hosts 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.
+#
+# openssh-known-hosts 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 openssh-known-hosts. If not, see <http://www.gnu.org/licenses/>.
+
+all: update-openssh-known-hosts.8
+
+%.8: %.8.md
+	pandoc -s -w man $< -o $@
+
+clean:
+	$(RM) *.8
diff --git a/README b/README
deleted file mode 100644
index 1953dd1..0000000
--- a/README
+++ /dev/null
@@ -1,41 +0,0 @@
-Writing a source definition:
-============================
-
-Place a file in /etc/openssh-known-hosts/sources. Its name must follow
-run-parts' conventions.
-
-Basic variables:
- * PLUGIN:	name of the plugin to use
- * EXIT_IGNORE:	space-seperated list of exitcodes which should be ignored, no
-		update is performed for this source then (optional)
-
-The rest of the variables is plugin-specific.
-
-For examples see /usr/share/doc/openssh-known-hosts/examples/*.
-
-Writing a hostname filter:
-==========================
-
-Place a file $source.filter next to your $source in
-/etc/openssh-known-hosts/sources.
-
-Each line shall contain a rule consisting of an action, a space and a pattern.
-The first rule with a matching pattern decides: If the action starts with a,
-o, p or y (for accept, admit, allow, ok, pass, permit, print, yes, ...) the
-hostname will be used, otherwise it is discarded. If a key has no hostnames
-left it is discarded as a whole.
-
-An example filter can be found in
-/usr/share/doc/openssh-known-hosts/examples/curl.filter.
-
-Writing a plugin:
-=================
-
-Place an executeable in /usr/local/share/openssh-known-hosts/plugins. Your
-plugin gets the variables set in the source definition in its environment. The
-working directory will be set to the source's cache directory. All your plugin
-has to do is to create a file named "new". "current" must not be touched but
-can be used as a hint to skip downloading the same file again. stdout and
-stderr will be connected to "log", which will be output on error. You needn't
-create "new" if it would be identical to "current".
-
diff --git a/changelog b/changelog
new file mode 100644
index 0000000..f2633e4
--- /dev/null
+++ b/changelog
@@ -0,0 +1,109 @@
+commit f8b47031fd65b9055e6a89a961466bdb367cd710
+Author: Timo Weingärtner <timo@tiwe.de>
+Date:   2014-02-18 18:25:08 +0100
+
+    Documentation update, license clarification
+    
+    use pandoc for manpage generation, drop now-redundant README
+
+commit c4c47613070b81b95434b03b6cda74daa76aada6
+Author: Timo Weingärtner <timo@tiwe.de>
+Date:   2014-02-05 15:15:11 +0100
+
+    make main script configurable via environment
+
+commit 17e1ec141ebea9c949dd5bc1933c9a1e057d5a16
+Author: Timo Weingärtner <timo@tiwe.de>
+Date:   2013-01-23 17:59:46 +0100
+
+    document alternate URL syntaxes and how to use ssh-based transfer with an identity
+
+commit 1e1e7fecbd162d7e763fd553994ba90298101659
+Author: Timo Weingärtner <timo@tiwe.de>
+Date:   2013-01-12 19:35:28 +0100
+
+    use #!/bin/sh, any POSIX sh is ok.
+    
+    Thanks: Philipp Kern <pkern@debian.org>
+
+commit 1b05237ebb0ef83d2b0603369347da9832711c82 (tag: 0.6)
+Author: Timo Weingärtner <timo@tiwe.de>
+Date:   2013-01-07 17:31:27 +0100
+
+    implement caching for filtered version
+    
+    filtering can take a long time, about 1m for 20k key entries
+
+commit 8d177fb1f42cb80ffbf678669cd726d40f26f123
+Author: Timo Weingärtner <timo@tiwe.de>
+Date:   2013-01-04 21:16:37 +0100
+
+    implement hostname filtering
+    
+    Fixes GH-1.
+
+commit b976b61bd47d0a404d94e390c429ac5e336b261a
+Author: Timo Weingärtner <timo@tiwe.de>
+Date:   2013-01-04 21:12:09 +0100
+
+    bash style fixups
+    
+    * [[ for less quoting
+    * -eq instead of = for numerical equality
+    * text manipulation instead of forking a basename(1)
+
+commit 15f2c2977ee6e95893e3fb4859bdf73dd6885e8a
+Author: Timo Weingärtner <timo@tiwe.de>
+Date:   2013-01-04 20:06:59 +0100
+
+    prefer local plugins over ones from a distro package
+
+commit a8e7c707a3e85cfcbdf2706634e8fc07dd9b3f54
+Author: Timo Weingärtner <timo@tiwe.de>
+Date:   2012-11-03 17:43:58 +0100
+
+    update pgsql plugin documentation
+    
+    + add SSL verification options
+    + replace PGCLUSTER with PGHOST, former cements the use of a specific
+      version of postgresql-client.
+    
+    Git-Dch: Full
+
+commit 9817011424d5a37501ffb6bcee573e6fb25b852d
+Author: Timo Weingärtner <timo@tiwe.de>
+Date:   2012-03-26 21:36:41 +0200
+
+    drop debian/
+    
+    debian packaging will be on separate branch now
+
+commit a2060472fe74355a4b772ca0efd28249702a7025 (tag: debian/0.5)
+Author: Timo Weingärtner <timo@tiwe.de>
+Date:   2012-02-25 21:17:06 +0100
+
+    Imported Debian version 0.5
+
+commit e5b99e36d96614d059137f3df323bcc39ead369e (tag: debian/0.4)
+Author: Timo Weingärtner <timo@tiwe.de>
+Date:   2012-02-25 21:17:04 +0100
+
+    Imported Debian version 0.4
+
+commit 550c2f513a05899566ca90a1e859218ee44a8ac7 (tag: debian/0.3)
+Author: Timo Weingärtner <timo@tiwe.de>
+Date:   2012-02-25 21:17:02 +0100
+
+    Imported Debian version 0.3
+
+commit 4b444020fa50e4f22a427b981c582b35cdb4efb1 (tag: debian/0.2)
+Author: Timo Weingärtner <timo@tiwe.de>
+Date:   2012-02-25 21:17:00 +0100
+
+    Imported Debian version 0.2
+
+commit 8f32f842b33bdc6617b41dc9f18b222fd3013e21 (tag: debian/0.1)
+Author: Timo Weingärtner <timo@tiwe.de>
+Date:   2012-02-25 21:08:57 +0100
+
+    Imported Debian version 0.1
diff --git a/examples/rsync b/examples/rsync
index f8d9861..1d9fd4c 100644
--- a/examples/rsync
+++ b/examples/rsync
@@ -3,6 +3,11 @@ PLUGIN=rsync
 EXIT_IGNORE=10
 
 URL='rsync://rsync.example.com/pub/known_hosts'
+# or:
+#URL='rsync.example.com::pub/known_hosts'
+# or (with a chicken and egg problem regarding the server's public hostkey):
+#URL='ssh.example.com:/path/to/known_hosts'
+#RSYNC_RSH='ssh -i /path/to/identity'
 
 # optional:
 SIGURL='rsync://rsync.example.com/pub/known_hosts.sig'
diff --git a/plugins/curl b/plugins/curl
index 6f803b3..93be854 100755
--- a/plugins/curl
+++ b/plugins/curl
@@ -1,4 +1,4 @@
-#!/bin/dash
+#!/bin/sh
 
 # curl plugin
 #
diff --git a/plugins/psql b/plugins/psql
index aa210d2..a7c0a72 100755
--- a/plugins/psql
+++ b/plugins/psql
@@ -1,4 +1,4 @@
-#!/bin/dash
+#!/bin/sh
 
 # psql plugin
 #
diff --git a/plugins/rsync b/plugins/rsync
index 2d51a9d..1a57660 100755
--- a/plugins/rsync
+++ b/plugins/rsync
@@ -1,4 +1,4 @@
-#!/bin/dash
+#!/bin/sh
 
 # rsync plugin
 #
diff --git a/plugins/symlink b/plugins/symlink
index 159e0e7..ec34cb4 100755
--- a/plugins/symlink
+++ b/plugins/symlink
@@ -1,4 +1,4 @@
-#!/bin/dash
+#!/bin/sh
 
 # symlink plugin
 #
diff --git a/update-openssh-known-hosts b/update-openssh-known-hosts
index d9ef613..82c56c4 100755
--- a/update-openssh-known-hosts
+++ b/update-openssh-known-hosts
@@ -1,12 +1,29 @@
 #!/bin/bash
 
+# Copyright (C) 2009-2014 Timo Weingärtner <timo@tiwe.de>
+#
+# This file is part of openssh-known-hosts.
+#
+# openssh-known-hosts 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.
+#
+# openssh-known-hosts 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 openssh-known-hosts. If not, see <http://www.gnu.org/licenses/>.
+
 set -euC
 
-CONFDIR=/etc/openssh-known-hosts
-PLUGIN_PATH=/usr/local/share/openssh-known-hosts/plugins:/usr/share/openssh-known-hosts/plugins
-CACHEDIR=/var/cache/openssh-known-hosts
-LOCK=/var/lock/openssh-known-hosts
-OUTFILE=/var/lib/openssh-known-hosts/ssh_known_hosts
+CONFDIR=${CONFDIR:-/etc/openssh-known-hosts}
+PLUGIN_PATH=${PLUGIN_PATH:-/usr/local/share/openssh-known-hosts/plugins:/usr/share/openssh-known-hosts/plugins}
+CACHEDIR=${CACHEDIR:-/var/cache/openssh-known-hosts}
+LOCK=${LOCK:-/var/lock/openssh-known-hosts}
+OUTFILE=${OUTFILE:-/var/lib/openssh-known-hosts/ssh_known_hosts}
 
 path_search () {
 	search="$1"
diff --git a/update-openssh-known-hosts.8 b/update-openssh-known-hosts.8
deleted file mode 100644
index 40552bd..0000000
--- a/update-openssh-known-hosts.8
+++ /dev/null
@@ -1,42 +0,0 @@
-.\"                                      Hey, EMACS: -*- nroff -*-
-.\" First parameter, NAME, should be all caps
-.\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
-.\" other parameters are allowed: see man(7), man(1)
-.TH OPENSSH-KNOWN-HOSTS 8 "2009-06-28"
-.\" Please adjust this date whenever revising the manpage.
-.\"
-.\" Some roff macros, for reference:
-.\" .nh        disable hyphenation
-.\" .hy        enable hyphenation
-.\" .ad l      left justify
-.\" .ad b      justify to both left and right margins
-.\" .nf        disable filling
-.\" .fi        enable filling
-.\" .br        insert line break
-.\" .sp <n>    insert n+1 empty lines
-.\" for manpage-specific macros, see man(7)
-.SH NAME
-update-openssh-known-hosts \- known_hosts downloader for OpenSSH
-.SH SYNOPSIS
-.B update-openssh-known-hosts
-.SH DESCRIPTION
-This manual page documents briefly the
-.B update-openssh-known-hosts
-command.
-.PP
-.\" TeX users may be more comfortable with the \fB<whatever>\fP and
-.\" \fI<whatever>\fP escape sequences to invode bold face and italics,
-.\" respectively.
-\fBupdate-openssh-known-hosts\fP is a program that downloads public hostkeys from multiple sources
-and merges them together into one file for use by OpenSSH.
-.SH OPTIONS
-This program takes no options.
-.SH SEE ALSO
-.BR sshd (8),
-.BR /usr/share/doc/openssh-known-hosts ,
-.BR /usr/share/openssh-known-hosts/plugins/* .
-.SH AUTHOR
-openssh-known-hosts was written by Timo Weing\[:a]rtner <timo@tiwe.de>.
-.PP
-This manual page was written by Timo Weing\[:a]rtner <timo@tiwe.de>,
-for the Debian project (but may be used by others).
diff --git a/update-openssh-known-hosts.8.md b/update-openssh-known-hosts.8.md
new file mode 100644
index 0000000..f4370d0
--- /dev/null
+++ b/update-openssh-known-hosts.8.md
@@ -0,0 +1,73 @@
+% UPDATE-OPENSSH-KNOWN-HOSTS(8)
+% Timo Weingärtner <timo@tiwe.de>
+% 2014-02-03
+
+# NAME
+
+update-openssh-knwon-hosts - download, filter and merge known_hosts for OpenSSH
+
+# SYNOPSIS
+
+*update-openssh-known-hosts* [*-f*]
+
+# DESCRIPTION
+
+update-openssh-known-hosts manages downloading, filtering and mergeing of ssh_known_hosts files from anywhere into one local file for use by ssh(1).
+
+# OPTIONS
+
+-f
+:   treat every non-zero exit from download plugin as an error, see EXIT_IGNORE below.
+
+# RETURN VALUES
+
+Returns zero on success and anything else on error.
+
+# ENVIRONMENT
+
+CONFDIR
+:   Configuration directory, defaults to /etc/openssh-known-hosts. Currently there is only a sources subdirectory in it.
+
+PLUGIN_PATH
+:   Plugin search path, defaults to /usr/local/share/openssh-known-hosts/plugins:/usr/share/openssh-known-hosts/plugins.
+
+CACHEDIR
+:   Cache directory, defaults to /var/cache/openssh-known-hosts.
+
+LOCK
+:   Lockfile path, defaults to /var/lock/openssh-known-hosts.
+
+OUTFILE
+:   Output file name, defaults to /var/lib/openssh-known-hosts/ssh_known_hosts
+
+# SOURCE DEFINITIONS
+
+A source definition is shell snippet dropped into CONFDIR/sources/ with a run-parts(8) compliant name.
+There are two variables not specific to a download plugin:
+
+PLUGIN
+:   name of the download plugin to use, searched for in PLUGIN_PATH.
+
+EXIT_IGNORE
+:   optional space-seperated list of exitcodes which should be ignored. Upon such exit code the previously downloaded version is used.
+
+# DOWNLOAD PLUGINS
+
+Download plugins are executables dropped into PLUGIN_PATH and referenced via the PLUGIN variable in the source definition.
+A plugin gets the variables set in the source definition in its environment.
+The working directory will be set to the source's cache directory.
+Everything a plugin has to do is to create a file named "new".
+"current" must not be touched but can be used as a hint to skip downloading the same file again.
+stdout and stderr will be connected to "log", which will be output on error.
+Plugins needn't create "new" if it would be identical to "current".
+
+# HOSTNAME FILTERS
+
+Place a file foo.filter next to your source definition foo.
+Each line shall contain a rule consisting of an action, a space and a pattern.
+The first rule with a matching pattern decides: If the action starts with a, o, p or y (for accept, admit, allow, ok, pass, permit, print, yes, ...) the hostname will be used, otherwise it is discarded.
+If a key has no hostnames left it is discarded as a whole.
+
+# SEE ALSO
+
+ssh(1), sshd(8), ssh_config(5), curl(1), rsync(1), psql(1), run-parts(8)