sm-summary fails on minimal-64 image

gistfile1.txt

# sm-summary fails with an error using the latest 2018-04-08 smartos-image
# error is:
[root@6e08a13d-1eb6-c5d6-c2ee-fea3793af583 ~]# sm-summary
* Gathering VM instance summary..
df: unknown option: B
Usage: df [-F FSType] [-abeghklmntPVvZ] [-o FSType-specific_options] [directory | block_device | resource]

[root@6e08a13d-1eb6-c5d6-c2ee-fea3793af583 ~]# grep df `which sm-summary`
vm_tmpused=$(df -B1 /tmp | awk '{ if ($1 ~ /swap/) printf("%d", $3/1024/1024) }');

[root@devtron ~]# imgadm avail | head -1 ; imgadm avail |grep minimal-64 | tail -3
UUID                                  NAME                            VERSION     OS       TYPE          PUB
03fba0ca-acff-11e7-9ec6-07009fb6ab46  minimal-64                      17.3.0      smartos  zone-dataset  2017-10-09
62aaa296-f143-11e7-bd81-9be1bda071f7  minimal-64-lts                  17.4.0      smartos  zone-dataset  2018-01-04
a9403aca-3b82-11e8-bc18-b30e5416d79b  minimal-64                      18.1.0      smartos  zone-dataset  2018-04-08

[root@devtron ~]# vmadm list
UUID                                  TYPE  RAM      STATE             ALIAS
6e08a13d-1eb6-c5d6-c2ee-fea3793af583  OS    256      running           min64
[root@devtron ~]# vmadm get 6e08a13d-1eb6-c5d6-c2ee-fea3793af583 | grep image_uuid
  "image_uuid": "a9403aca-3b82-11e8-bc18-b30e5416d79b",

# ah, df on minimal-64 is different than df on base-64 (/opt/local/bin/df (GNU df))
# minimal-64 has this /usr/sbin/df only:

DF(1M)                       Maintenance Commands                       DF(1M)



NAME
       df - displays number of free disk blocks and free files

SYNOPSIS
       /usr/bin/df [-F FSType] [-abeghklmnPtVvZ]
            [-o FSType-specific_options]
            [block_device | directory | file | resource ...]


# Not sure if this ever worked or not, where in the smartos source does sm-summary live?