mount_smbfs(8) on FreeBSD
The text b2732fca4d9f, as FreeBSD 12.0-RELEASE shipped it.
mount a shared resource from an SMB file server
Flags it lists
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-E -
-I -
-L -
-M -
-N -
-O -
-R -
-T -
-U -
-W -
-c -
-d -
-f -
-g -
-u