Bunset

The bunset command is used to unset a binary file.

bunset <&binvar> [&binvar &binvar ... &binvar]

This unsets all specified binary files. Unlike unset, bunset doesn't work with wildcards.

Example

bset &test 1 65 66 67
echo -a $bvar(&test,0) returns 3
bunset &test
echo -a $bvar(&test,0) returns 0

In this case the first echo will echo "1" as &test is filled with 1 byte, the second echo will echo "0" as &test is unset.