$ fs sysname new_sysname -pid 1234
fs: new sysname list set for pid 1234.

$ fs sysname -pid 1234
Current sysname for pid 1234 is 'new_sysname'

$ fs sysname -pid 1234 -delete
fs: sysname list deleted for pid 1234.

$ fs sysname new_sysname -global
fs: new global sysname set.

$ fs sysname -global
Current global sysname is 'new_sysname'
$