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authorKenneth R Westerback <krw@cvs.openbsd.org>2011-01-03 14:26:52 +0000
committerKenneth R Westerback <krw@cvs.openbsd.org>2011-01-03 14:26:52 +0000
commitdcb430e3546298eae3e1a929abcd446f1e7a03c9 (patch)
treea23d2144121fd5335ffe4d5cfb8c1c298c743768 /lib/libutil/opendev.3
parentec82a45cd95df7815cfdd37e14dc6db416d5349d (diff)
Update to better describe reality, i.e. disklabel(8) UID usage.
ok jmc@ jsing@
Diffstat (limited to 'lib/libutil/opendev.3')
-rw-r--r--lib/libutil/opendev.334
1 files changed, 24 insertions, 10 deletions
diff --git a/lib/libutil/opendev.3 b/lib/libutil/opendev.3
index 08b0613884e..ce4eb3fae80 100644
--- a/lib/libutil/opendev.3
+++ b/lib/libutil/opendev.3
@@ -1,4 +1,4 @@
-.\" $OpenBSD: opendev.3,v 1.19 2010/12/17 19:35:34 millert Exp $
+.\" $OpenBSD: opendev.3,v 1.20 2011/01/03 14:26:51 krw Exp $
.\"
.\" Copyright (c) 2000, Todd C. Miller. All rights reserved.
.\" Copyright (c) 1996, Jason Downs. All rights reserved.
@@ -24,7 +24,7 @@
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
-.Dd $Mdocdate: December 17 2010 $
+.Dd $Mdocdate: January 3 2011 $
.Dt OPENDEV 3
.Os
.Sh NAME
@@ -37,23 +37,35 @@
.Sh DESCRIPTION
The
.Fn opendev
-function opens a device using the
+function opens a device using a
.Dq short form
-name.
-This is typically
+name or
+.Xr disklabel 8
+UID
+.Pq DUID .
+For instance
.Dq sd0
or
-.Dq sd0c ,
-for instance, which will be expanded to
+.Dq sd0c
+will be expanded to
.Pa /dev/rsd0c
on most architectures.
.Pp
Device name lookup is done by first checking
.Fa path
for a
-.Dq /
+.Sq /
and if one is found attempting to open that file.
-Otherwise
+If not,
+.Fa path
+is checked to see if it is a valid DUID.
+If it is, the corresponding device is obtained via
+.Xr diskmap 4 .
+If
+.Fa path
+has no
+.Sq /
+and is not a DUID,
.Fa /dev
is searched for a matching device.
.Pp
@@ -86,7 +98,9 @@ return value and errors are the same as the return value and errors of
.Xr open 2 .
.Sh SEE ALSO
.Xr open 2 ,
-.Xr getrawpartition 3
+.Xr getrawpartition 3 ,
+.Xr diskmap 4 ,
+.Xr disklabel 8
.Sh HISTORY
The
.Fn opendev