mkfs.cramfs(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.cramfs.8.adoc b/disk-utils/mkfs.cramfs.8.adoc
index bca5e8f624d15eb1199f02fcf058963b2a7b8ab5..9759b6b5442849c9aac42cae774947f2face426b 100644 (file)
--- a/disk-utils/mkfs.cramfs.8.adoc
+++ b/disk-utils/mkfs.cramfs.8.adoc
@@ -72,6 +72,11 @@ to avoid collisions with *systemd-udevd*(8) or other tools.
 
 include::man-common/help-version.adoc[]
 
+== ENVIRONMENT
+
+LOCK_BLOCK_DEVICE=<mode>::
+use exclusive BSD lock. The mode is "1" or "0". See *-l* for more details.
+
 == EXIT STATUS
 
 *0*::