docs/pacman.conf: Document SigLevel option

This adds docs for SigLevel, which can exist in both [options] and
[repository] sections. It also does a bit of reworking of the structure
of this manpage and adds a labeled list under the repo sections where we
didn't have one before.

Signed-off-by: Dan McGee <dan@archlinux.org>

1 files changed, 84 insertions, 8 deletions

diff --git a/doc/pacman.conf.5.txt b/doc/pacman.conf.5.txt
index 08fd0e15..4832934f 100644
--- a/doc/pacman.conf.5.txt
+++ b/doc/pacman.conf.5.txt
@@ -156,6 +156,10 @@ Options
 	packages are only cleaned if not installed locally and not present in any
 	known sync database.
 
+*SigLevel =* ...::
+	Set the default signature verification level. For more information, see
+	<<SC,Package and Database Signature Checking>> below.
+
 *UseSyslog*::
 	Log action messages through syslog(). This will insert log entries into
 	+{localstatedir}/log/messages+ or equivalent.
@@ -193,27 +197,99 @@ contain a file that lists the servers for that repository.
 
 --------
 [core]
-# use this repository first
-Server = ftp://ftp.archlinux.org/core/os/arch
+# use this server first
+Server = ftp://ftp.archlinux.org/$repo/os/$arch
 # next use servers as defined in the mirrorlist below
 Include = {sysconfdir}/pacman.d/mirrorlist
 --------
 
+The order of repositories in the configuration files matters; repositories
+listed first will take precedence over those listed later in the file when
+packages in two repositories have identical names, regardless of version
+number.
+
+*Include =* path::
+	Include another config file. This file can include repositories or
+	general configuration options. Wildcards in the specified paths will get
+	expanded based on linkman:glob[7] rules.
+
+*Server =* url::
+	A full URL to a location where the database, packages, and signatures (if
+	available) for this repository can be found.
++
 During parsing, pacman will define the `$repo` variable to the name of the
 current section. This is often utilized in files specified using the 'Include'
 directive so all repositories can use the same mirrorfile. pacman also defines
 the `$arch` variable to the value of `Architecture`, so the same mirrorfile can
 even be used for different architectures.
 
+*SigLevel =* ...::
+	Set the signature verification level for this repository. For more
+	information, see <<SC,Package and Database Signature Checking>> below.
+
+Package and Database Signature Checking
+---------------------------------------
+The 'SigLevel' directive is valid in both the `[options]` and repository
+sections. If used in `[options]`, it sets a default value for any repository
+that does not provide the setting.
+
+If set to *Never*, no signature checking will take place.
+If set to *Optional* , signatures will be checked when present, but unsigned
+databases and packages will also be accepted.
+If set to *Required*, signatures will be required on all packages and
+databases.
+
+Alternatively, you can get more fine-grained control by combining some of
+the options and prefixes described below. All options in a config file are
+processed in top-to-bottom, left-to-right fashion, where later options override
+and/or supplement earlier ones. If 'SigLevel' is specified in a repository
+section, the starting value is that from the `[options]` section, or the
+built-in system default as shown below if not specified.
+
+The options are split into two main groups, described below. Terms used such as
+``marginally trusted'' are terms used by GnuPG, for more information please
+consult linkman:gpg[1].
+
+When to Check::
+	These options control if and when signature checks should take place.
+
+	*Never*;;
+		All signature checking is suppressed, even if signatures are present.
+
+	*Optional* (default);;
+		Signatures are checked if present; absence of a signature is not an
+		error. An invalid signature is a fatal error, as is a signature from a
+		key not in the keyring.
+
+	*Required*;;
+		Signatures are required; absence of a signature or an invalid signature
+		is a fatal error, as is a signature from a key not in the keyring.
+
+What is Allowed::
+	These options control what signatures are viewed as permissible. Note that
+	neither of these options allows acceptance of invalid or expired
+	signatures, or those from revoked keys.
+
+	*TrustedOnly* (default);;
+		If a signature is checked, it must be in the keyring and fully trusted;
+		marginal trust does not meet this criteria.
+
+	*TrustAll*;;
+		If a signature is checked, it must be in the keyring, but is not
+		required to be assigned a trust level (e.g., unknown or marginal
+		trust).
+
+Options in both groups can additionally be prefixed with either *Package* or
+*Database*, which will cause it to only take effect on the specified object
+type. For example, `PackageTrustAll` would allow marginal and unknown trust
+level signatures for packages.
+
+The built-in default is the following:
+
 --------
-Server = ftp://ftp.archlinux.org/$repo/os/$arch
+SigLevel = Optional TrustedOnly
 --------
 
-The order of repositories in the configuration files matters; repositories
-listed first will take precedence over those listed later in the file when
-packages in two repositories have identical names, regardless of version
-number.
-
 Using Your Own Repository
 -------------------------
 If you have numerous custom packages of your own, it is often easier to generate