--- /dev/null
+/* $NetBSD: poll.h,v 1.3 2008/04/29 05:46:08 martin Exp $ */
+
+/*-
+ * Copyright (c) 1998 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Charles M. Hannum.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _NBCOMPAT_POLL_H_
+#define _NBCOMPAT_POLL_H_
+
+#include <sys/cdefs.h>
+
+typedef unsigned int nfds_t;
+
+struct pollfd {
+ int fd; /* file descriptor */
+ short events; /* events to look for */
+ short revents; /* events returned */
+};
+
+/*
+ * Testable events (may be specified in events field).
+ */
+#define POLLIN 0x0001
+#define POLLPRI 0x0002
+#define POLLOUT 0x0004
+#define POLLRDNORM 0x0040
+#define POLLWRNORM POLLOUT
+#define POLLRDBAND 0x0080
+#define POLLWRBAND 0x0100
+
+/*
+ * Non-testable events (may not be specified in events field).
+ */
+#define POLLERR 0x0008
+#define POLLHUP 0x0010
+#define POLLNVAL 0x0020
+
+__BEGIN_DECLS
+int poll (struct pollfd *, nfds_t, int);
+__END_DECLS
+
+#endif /* !_NBCOMPAT_POLL_H_ */
--- /dev/null
+/* $NetBSD: poll.c,v 1.3 2008/04/29 05:46:08 martin Exp $ */
+
+/*-
+ * Copyright (c) 2003 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Charles Blundell.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <unistd.h>
+#include <sys/poll.h>
+#include <errno.h>
+
+int
+poll(struct pollfd *p, nfds_t nfds, int timout)
+{
+ fd_set read, write, except;
+ struct timeval tv;
+ nfds_t i;
+ int highfd, rval;
+
+ /*
+ * select cannot tell us much wrt POLL*BAND, POLLPRI, POLLHUP or
+ * POLLNVAL.
+ */
+ FD_ZERO(&read);
+ FD_ZERO(&write);
+ FD_ZERO(&except);
+
+ highfd = -1;
+ for (i = 0; i < nfds; i++) {
+ if (p[i].fd < 0)
+ continue;
+ if (p[i].fd >= FD_SETSIZE) {
+ errno = EINVAL;
+ return -1;
+ }
+ if (p[i].fd > highfd)
+ highfd = p[i].fd;
+
+ if (p[i].events & (POLLIN|POLLRDNORM|POLLRDBAND|POLLPRI))
+ FD_SET(p[i].fd, &read);
+ if (p[i].events & (POLLOUT|POLLWRNORM|POLLWRBAND))
+ FD_SET(p[i].fd, &write);
+ FD_SET(p[i].fd, &except);
+ }
+
+ tv.tv_sec = timout / 1000;
+ tv.tv_usec = (timout % 1000) * 1000;
+
+ rval = select(highfd + 1, &read, &write, &except,
+ timout == -1 ? NULL : &tv);
+ if (rval <= 0)
+ return rval;
+
+ rval = 0;
+ for (i = 0; i < nfds; i++) {
+ p[i].revents = 0;
+ if (FD_ISSET(p[i].fd, &read))
+ p[i].revents |= POLLIN|POLLRDNORM|POLLRDBAND|POLLPRI;
+ if (FD_ISSET(p[i].fd, &write))
+ p[i].revents |= POLLOUT|POLLWRNORM|POLLWRBAND;
+ if (FD_ISSET(p[i].fd, &except))
+ p[i].revents |= POLLERR;
+ /* XXX: POLLHUP/POLLNVAL? */
+ if (p[i].revents != 0)
+ rval++;
+ }
+ return rval;
+}