5 Built-In Commands in MDB
MDB provides a set of built-in dcmds that are always defined. Some of these dcmds are applicable only to certain targets: if a dcmd is not applicable to the current target, it fails and prints a message indicating "command is not supported by current target".
In many cases, MDB provides a mnemonic equivalent (::identifier) for the
legacy
adb(1) dcmd names. For example, ::quit is
provided as the equivalent of $q. Programmers who are familiar with
adb(1) or who appreciate brevity might prefer the
$ or : forms of the built-ins. Programmers who
are not familiar with MDB might prefer the more verbose :: form. The
built-ins are shown in alphabetical order. If a $ or
: form has a ::identifier equivalent, it is
shown under the ::identifier form.