Attachment 151802 Details for Bug 196844 – patch to kqueue(2) man page

[patch] patch to kqueue(2) man page

kqueue.2.patch (text/plain), 1.44 KB, created by Fernando Apesteguía on 2015-01-18 18:43:31 UTC

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Creator: Fernando Apesteguía

Created: 2015-01-18 18:43:31 UTC

Size: 1.44 KB

patch

obsolete

>--- lib/libc/sys/kqueue.2.orig	2015-01-18 19:08:34.000000000 +0100
>+++ lib/libc/sys/kqueue.2	2015-01-18 19:18:09.000000000 +0100
>@@ -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

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