manpage: add section on character class matches to exports(5)

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve Dickson <steved@redhat.com>

diff --git a/utils/exportfs/exports.man b/utils/exportfs/exports.man
index d9486e87d16ffd585853cfc3c915c491375ad1b5..b202583ddfae72dc5fa82664a3b12162429bed28 100644 (file)
--- a/utils/exportfs/exports.man
+++ b/utils/exportfs/exports.man
@@ -47,7 +47,9 @@ NFS clients may be specified in a number of ways:
 .IP "single host
 You may specify a host either by an
 abbreviated name recognized be the resolver, the fully qualified domain
 .IP "single host
 You may specify a host either by an
 abbreviated name recognized be the resolver, the fully qualified domain

-name, an IPv4 address, or an IPv6 address.
+name, an IPv4 address, or an IPv6 address. IPv6 addresses must not be
+inside square brackets in /etc/exports lest they be confused with
+character-class wildcard matches.

 .IP "IP networks
 You can also export directories to all hosts on an IP (sub-) network
 simultaneously. This is done by specifying an IP address and netmask pair
 .IP "IP networks
 You can also export directories to all hosts on an IP (sub-) network
 simultaneously. This is done by specifying an IP address and netmask pair


@@ -57,11 +59,10 @@ where the netmask can be specified in dotted-decimal format, or as a
 contiguous mask length.
 For example, either `/255.255.252.0' or `/22' appended
 to the network base IPv4 address results in identical subnetworks with 10 bits
 contiguous mask length.
 For example, either `/255.255.252.0' or `/22' appended
 to the network base IPv4 address results in identical subnetworks with 10 bits

-of host. IPv6 addresses must use a contiguous mask length. Wildcard characters
-generally do not work on IP addresses, though they
+of host. IPv6 addresses must use a contiguous mask length and must not be inside square brackets to avoid confusion with character-class wildcards. Wildcard characters generally do not work on IP addresses, though they

 may work by accident when reverse DNS lookups fail.
 .IP "wildcards
 may work by accident when reverse DNS lookups fail.
 .IP "wildcards

-Machine names may contain the wildcard characters \fI*\fR and \fI?\fR.
+Machine names may contain the wildcard characters \fI*\fR and \fI?\fR, or may contain character class lists within [square brackets].

 This can be used to make the \fIexports\fR file more compact; for instance,
 \fI*.cs.foo.edu\fR matches all hosts in the domain
 \fIcs.foo.edu\fR.  As these characters also match the dots in a domain
 This can be used to make the \fIexports\fR file more compact; for instance,
 \fI*.cs.foo.edu\fR matches all hosts in the domain
 \fIcs.foo.edu\fR.  As these characters also match the dots in a domain


@@ -488,6 +489,7 @@ The format for extra export tables is the same as
 /pub            *(ro,insecure,all_squash)
 /srv/www        \-sync,rw server @trusted @external(ro)
 /foo            2001:db8:9:e54::/64(rw) 192.0.2.0/24(rw)
 /pub            *(ro,insecure,all_squash)
 /srv/www        \-sync,rw server @trusted @external(ro)
 /foo            2001:db8:9:e54::/64(rw) 192.0.2.0/24(rw)

+/build          buildhost[0-9].local.domain(rw)

 '''/pub/private    (noaccess)
 .fi
 .PP
 '''/pub/private    (noaccess)
 .fi
 .PP


@@ -504,7 +506,8 @@ don't use a reserved port for NFS.
 The sixth line exports a directory read-write to the machine 'server'
 as well as the `@trusted' netgroup, and read-only to netgroup `@external',
 all three mounts with the `sync' option enabled. The seventh line exports
 The sixth line exports a directory read-write to the machine 'server'
 as well as the `@trusted' netgroup, and read-only to netgroup `@external',
 all three mounts with the `sync' option enabled. The seventh line exports

-a directory to both an IPv6 and an IPv4 subnet.
+a directory to both an IPv6 and an IPv4 subnet. The eighth line demonstrates
+a character class wildcard match.

 ''' The last line denies all NFS clients
 '''access to the private directory.
 '''.SH CAVEATS
 ''' The last line denies all NFS clients
 '''access to the private directory.
 '''.SH CAVEATS