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Move EXAMPLES descriptions to before the actual command.

Browse Source 
PR:		177870
Submitted by:	Bjorn Heidotting <b.heidotting@yahoo.com>
This commit is contained in:
Joel Dahl 2013-04-21 10:08:33 +00:00
parent 584a9cf8bf
commit 309bbfe8d2
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=249720
1 changed files with 39 additions and 40 deletions
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sbin/devfs/devfs.8
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@ -25,7 +25,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd February 21, 2010
.Dd April 21, 2013
.Dt DEVFS 8
.Os
.Sh NAME
@ -269,13 +269,11 @@ the operations are performed on
.Pa /dev
(this only matters for things that might change the properties of nodes).
.Pp
.Dl "devfs ruleset 10"
.Pp
Specify that ruleset 10 should be the current ruleset for
.Pa /dev
(if it does not already exist, it is created).
(if it does not already exist, it is created):
.Pp
.Dl "devfs rule add path speaker mode 666"
.Dl "devfs ruleset 10"
.Pp
Add a rule that causes all nodes that have a path that matches
.Dq Li speaker
@ -291,22 +289,19 @@ be changed if the node is created
the rule is added
(e.g., the
.Pa atspeaker
module is loaded after the above rule is added).
module is loaded after the above rule is added):
.Pp
.Dl "devfs rule applyset"
.Dl "devfs rule add path speaker mode 666"
.Pp
Apply all the rules in the current ruleset to all the existing nodes.
E.g., if the above rule was added after
E.g., if the below rule was added after
.Pa /dev/speaker
was created,
this command will cause its file mode to be changed to 666
as prescribed by the rule.
as prescribed by the rule:
.Pp
.Dl devfs rule add path "snp*" mode 660 group snoopers
.Dl "devfs rule applyset"
.Pp
(Quoting the argument to
.Cm path
is often necessary to disable the shell's globbing features.)
For all devices with a path that matches
.Dq Li snp* ,
set the file mode to 660 and the GID to
@ -315,53 +310,57 @@ This permits users in the
.Dq Li snoopers
group to use the
.Xr snp 4
devices.
devices
(quoting the argument to
.Cm path
is often necessary to disable the shell's globbing features):
.Pp
.Dl "devfs rule -s 20 add type disk group wheel"
.Dl devfs rule add path "snp*" mode 660 group snoopers
.Pp
Add a rule to ruleset number 20.
Since this ruleset is not the current ruleset for any mount-points,
this rule is never applied automatically (unless ruleset 20 becomes
a current ruleset for some mount-point at a later time).
However, it can be applied explicitly, as such:
a current ruleset for some mount-point at a later time):
.Pp
.Dl "devfs rule -s 20 add type disk group wheel"
.Pp
Explicitly apply all rules in ruleset number 20 to the DEVFS mount on
.Pa /my/jail/dev .
It does not matter that ruleset 20 is not the current ruleset for that
mount-point; the rules are still applied:
.Pp
.Dl "devfs -m /my/jail/dev rule -s 20 applyset"
.Pp
This will apply all rules in ruleset number 20 to the DEVFS mount on
.Pa /my/jail/dev .
It does not matter that ruleset 20 is not the current ruleset for that
mount-point; the rules are still applied.
Since the following rule has no conditions, the action
.Pq Cm hide
will be applied to all nodes:
.Pp
.Dl "devfs rule apply hide"
.Pp
Since this rule has no conditions, the action
.Pq Cm hide
will be applied to all nodes.
Since hiding all nodes is not very useful, we can undo it:
Since hiding all nodes is not very useful, we can undo it.
The following applies
.Cm unhide
to all the nodes,
causing them to reappear:
.Pp
.Dl "devfs rule apply unhide"
.Pp
which applies
.Cm unhide
to all the nodes,
causing them to reappear.
Add all the rules from the file
.Pa my_rules
to ruleset 10:
.Pp
.Dl "devfs rule -s 10 add - < my_rules"
.Pp
Add all the rules from the file
.Pa my_rules
to ruleset 10.
.Pp
.Dl "devfs rule -s 20 show | devfs rule -s 10 add -"
.Pp
Since
.Cm show
outputs valid rules,
this feature can be used to copy rulesets.
The above copies all the rules from ruleset 20 into ruleset 10.
The below copies all the rules from ruleset 20 into ruleset 10.
The rule numbers are preserved,
but ruleset 10 may already have rules with non-conflicting numbers
(these will be preserved).
Since
.Cm show
outputs valid rules,
this feature can be used to copy rulesets:
.Pp
.Dl "devfs rule -s 20 show | devfs rule -s 10 add -"
.Sh SEE ALSO
.Xr chmod 1 ,
.Xr jail 2 ,