D6082.id15552.diff
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	Index: lib/libc/sys/kqueue.2
	===================================================================
	--- lib/libc/sys/kqueue.2
	+++ lib/libc/sys/kqueue.2
	@@ -525,6 +525,64 @@
	If the time limit expires, then
	.Fn kevent
	returns 0.
	+.Sh EXAMPLES
	+.Bd -literal -compact
	+#include <sys/types.h>
	+#include <sys/event.h>
	+#include <sys/time.h>
	+#include <fcntl.h>
	+#include <stdio.h>
	+#include <stdlib.h>
	+#include <string.h>
	+#include <unistd.h>
	+
	+int
	+main(int argc, char **argv)
	+{
	+
	+ struct kevent event; /* Event we want to monitor */
	+ struct kevent tevent; /* Event triggered */
	+ int kq, fd, ret;
	+
	+ if (argc != 2) {
	+ printf("Usage: %s dir\n", argv[0]);
	+ exit(EXIT_SUCCESS);
	+ }
	+
	+ if ((fd = open(argv[1], O_RDONLY)) == -1) {
	+ perror("open");
	+ exit(EXIT_FAILURE);
	+ }
	+
	+ /* Create kqueue */
	+ if ((kq = kqueue()) == -1) {
	+ perror("queue");
	+ exit(EXIT_FAILURE);
	+ }
	+
	+ /* Initialize kevent structure */
	+ EV_SET(&event, fd, EVFILT_VNODE , EV_ADD \| EV_ONESHOT, NOTE_WRITE, 0, NULL);
	+
	+ for (;;) {
	+ /* Attach event to the kqueue and block until something happens */
	+ ret = kevent(kq, &event, 1, &tevent, 1, NULL);
	+ if (ret == -1) {
	+ perror("kevent");
	+ exit(EXIT_FAILURE);
	+ } else if (ret > 0) {
	+ if (event.flags & EV_ERROR) {
	+ fprintf(stderr, "Event error: %s\n", strerror(event.data));
	+ }
	+ printf("Something was written in '%s'\n", argv[1]);
	+ }
	+ }
	+
	+ /* NOTREACHED */
	+ close(fd);
	+ exit(EXIT_SUCCESS);
	+
	+}
	+.Ed
	.Sh ERRORS
	The
	.Fn kqueue