.\"
.TH LOCKDEV 8 "SEPTEMBER 2009" "" ""
.\"
.\" Man page written by Jiri Popelka <jpopelka AT redhat DOT com>
.\"
.SH NAME
\fBlockdev\fR demonstrates functionality of liblockdev library.

.SH SYNOPSIS
.B /usr/sbin/lockdev
.RB [< operation >]
.RB < device >

.SH DESCRIPTION
The \fBlockdev\fR command can perform one of the following operations:

\fB-l\fR - lock device with \fBdev_lock()\fR function

\fB-u\fR - unlock device with \fBdev_unlock()\fR function

\fBno operation\fR - test lock with \fBdev_testlock()\fR function

.SH RETURN VALUES
   Value  dev_lock         dev_unlock       dev_testlock
   0      OK               OK               not locked
   1      locked other     locked other     locked
   2      EACCES
   3      EROFS
   4      EFAULT
   5      EINVAL
   6      ENAMETOOLONG
   7      ENOENT
   8      ENOTDIR
   9      ENOMEM
  10      ELOOP
  11      EIO
 255      error               error               error

.SH SEE ALSO
.BR lockdev (3).