sysctl description spillover and also setting the sysctl ?

[Jason Hellenthal]

Found a troubling result of the following and figured someone might want to take a look.

Pay close attention to the output and behavior.

sysctl net.inet.udp.blackhole=0
sysctl net.inet.udp.blackhole
sysctl -d net.inet.udp.blackhole=1
sysctl net.inet.udp.blackhole


Is this expected ? should it not just display the description instead of adjusting ? as well not display the description like it is adjusting the description too ?

# sysctl net.inet.udp.blackhole=0
net.inet.udp.blackhole: 0 -> 0
# sysctl net.inet.udp.blackhole
net.inet.udp.blackhole: 0
# sysctl -d net.inet.udp.blackhole=1
net.inet.udp.blackhole: Do not send port unreachables for refused connects -> Do not send port unreachables for refused connects
# sysctl net.inet.udp.blackhole
net.inet.udp.blackhole: 1
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