mkfs.bfs(man): Add ENVIRONMENT section

Document LOCK_BLOCK_DEVICE, which is supported by the tool.

Signed-off-by: Tobias Stoeckmann <tobias@stoeckmann.org>

diff --git a/disk-utils/mkfs.bfs.8.adoc b/disk-utils/mkfs.bfs.8.adoc
index 647b0d5bbb86a55be15b6bd75fb144c04f78df79..38cc95597618f86080be8131e13b2d57a4c0a825 100644 (file)
--- a/disk-utils/mkfs.bfs.8.adoc
+++ b/disk-utils/mkfs.bfs.8.adoc
@@ -57,6 +57,11 @@ This option is silently ignored.
 include::man-common/help-version.adoc[]
 Option *-V* only works as *--version* when it is the only option.
 
+== ENVIRONMENT
+
+LOCK_BLOCK_DEVICE=<mode>::
+use exclusive BSD lock. The mode is "1" or "0". See *--lock* for more details.
+
 == EXIT STATUS
 
 The exit status returned by *mkfs.bfs* is 0 when all went well, and 1 when something went wrong.