Specs

link(pid() | port()) :: true

Creates a link between the calling process and the given item (process or port).

Links are bidirectional. Linked processes can be unlinked by using unlink/1.

If such a link exists already, this function does nothing since there can only be one link between two given processes. If a process tries to create a link to itself, nothing will happen.

When two processes are linked, each one receives exit signals from the other (see also exit/2). Let's assume pid1 and pid2 are linked. If pid2 exits with a reason other than :normal (which is also the exit reason used when a process finishes its job) and pid1 is not trapping exits (see flag/2), then pid1 will exit with the same reason as pid2 and in turn emit an exit signal to all its other linked processes. The behaviour when pid1 is trapping exits is described in exit/2.

See :erlang.link/1 for more information.

Inlined by the compiler.