Improve systemd script to not leave stale sharetab

The systemd script zfs-share.service does 'zfs share -a' to share
any required datasets.  Unfortunately, /etc/dfs/sharetab is stale
from the previous boot.  Delete it before we share.

Signed-off-by: Dan Swartzendruber <dswartz@druber.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2883

diff --git a/etc/systemd/system/zfs-share.service.in b/etc/systemd/system/zfs-share.service.in
index d62e3407cc48dccb3793bd21b175437ce20d56d5..c27bbf903ecbe7afac20f5a8ca05200cbb7149e1 100644 (file)
--- a/etc/systemd/system/zfs-share.service.in
+++ b/etc/systemd/system/zfs-share.service.in
@@ -10,4 +10,5 @@ PartOf=smb.service
 [Service]
 Type=oneshot
 RemainAfterExit=yes
+ExecStartPre=-@bindir@/rm /etc/dfs/sharetab
 ExecStart=@sbindir@/zfs share -a