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add a note about exclusive open

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This commit is contained in:
Matt Jacob 1999-02-05 08:06:05 +00:00
parent 0a36ae3668
commit 2ab2a2e58e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=43641
1 changed files with 6 additions and 1 deletions
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7
share/man/man4/sa.4
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@ -23,7 +23,7 @@
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $Id: sa.4,v 1.12 1998/10/16 04:06:21 ken Exp $
.\" $Id: sa.4,v 1.13 1999/02/05 07:48:26 mjacob Exp $
.\"
.Dd October 15, 1998
.Dt SA 4
@ -74,6 +74,11 @@ command, reachable through the
.Sq Cm offline
command of
.Xr mt 1 .
.El
.Pp
It should be noted that tape devices are exclusive open devices, except in
the case where a control mode device is opened. In the latter case, exclusive
access is only sought when needed (e.g., to set parameters).
.Sh SUB-MODES
Bits 0 and 1 of the minor number are interpreted as
.Sq sub-modes .