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[;1m-spec link(PidOrPort) -> true when PidOrPort :: pid() | port().[0m
Creates a link between the calling process and another process (or
port) [;;4mPidOrPort[0m. If the link already exists or a process
attempts to create a link to itself, nothing is done. Returns [;;4m[0m
[;;4mtrue[0m if the link is set up.
If [;;4mPidOrPort[0m does not exist and checking it is cheap, a [;;4mnoproc[0m
error is raised. Currently, checking is cheap if the [;;4mPidOrPort[0m
is local and the caller does not trap exits (see [;;4mprocess_flag/2 [0m
).
Apart from any exit signals from the linked process itself, two
special exit signals may be sent to the calling process:
• [;;4mnoproc[0m is sent immediately if [;;4mPidOrPort[0m does not exist at
the time of linking (if the caller is trapping exits or [;;4m[0m
[;;4mPidOrPort[0m is remote).
• [;;4mnoconnection[0m if [;;4mPidOrPort[0m is remote and a connection
between the nodes could not be established or was severed.
See Processes ➜ Links in the Erlang Reference Manual for more
details.
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