NAME
    FindPort -- find a given system message port

SYNOPSIS
    port = FindPort(name)
    D0              A1

    struct MsgPort *FindPort(STRPTR);

FUNCTION
    This function will search the system message port list for a port
    with the given name.  The first port matching this name will be
    returned.  No arbitration of the port list is done.  This function
    MUST be protected with A Forbid()/Permit() pair!

EXAMPLE
    #include <exec/types.h>
    struct MsgPort *FindPort();

    ULONG SafePutToPort(message, portname)
    struct Message *message;
    STRPTR          portname;
    {
    struct MsgPort *port;

        Forbid();
            port = FindPort(portname);
            if (port)
                PutMsg(port,message);
        Permit();
        return((ULONG)port); /* If zero, the port has gone away */
    }

INPUT
    name - name of the port to find

RETURN
    port - a pointer to the message port, or zero if
            not found.