do/msgsnd


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int
do_msgsnd(arglast)
int *arglast;
{
#ifdef HAS_MSG
    register STR **st = stack->ary_array;
    register int sp = arglast[0];
    STR *mstr;
    char *mbuf;
    int id, msize, flags;

    id = (int)str_gnum(st[++sp]);
    mstr = st[++sp];
    flags = (int)str_gnum(st[++sp]);
    mbuf = str_get(mstr);
    if ((msize = mstr->str_cur - sizeof(long)) < 0) {
	errno = EINVAL;
	return -1;
    }
    errno = 0;
    return msgsnd(id, (struct msgbuf *)mbuf, msize, flags);
#else
    fatal("msgsnd not implemented");
#endif
}