initial version

thotplug.c

@@ -0,0 +1,73 @@
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/device.h>
+#include <sys/hotplug.h>
+
+#include <err.h>
+#include <fcntl.h>
+#include <poll.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int
+main(int argc, char *argv[])
+{
+#if 0
+	struct kevent ev;
+#endif
+	struct hotplug_event he;
+	char *device;
+	int fd, kq, kev;
+	
+	if (argc == 2)
+		device = argv[1];
+	else
+		device = "/dev/hotplug";
+
+	fd = open(device, O_RDONLY);
+	if (fd == -1)
+		err(2, "open %s", device);
+#if 0
+	if ((kq = kqueue()) <= 0)
+		err(2, "kqueue");
+
+	EV_SET(&ev, fd, EVFILT_DEVICE, EV_ADD | EV_ENABLE | EV_CLEAR,
+	    NOTE_CHG_DATA, 0, NULL);
+	if (kevent(kq, &ev, 1, NULL, 0, NULL) < 0)
+		err(2, "kevent init");
+#endif
+	while (1) {
+#if 0
+		struct pollfd fds;
+		int result;
+
+		fds.fd = kq;
+		fds.events = POLLIN;
+		result = poll(&fds, 1, INFTIM);
+		printf("poll result %d\n", result);
+#endif
+		int n;
+		n = read(fd, &he, sizeof(he));
+		if (n == -1)
+			err(2, "read");
+		printf("hotplug event %d %d %s\n",
+		    he.he_devclass, he.he_type, he.he_devname);
+                if (he.he_devclass != DV_TTY)
+                        continue;
+                switch (he.he_type) {
+                case HOTPLUG_DEVAT:
+                        printf("wscons attach %s\n", he.he_devname);
+                        break;
+                case HOTPLUG_DEVDT:
+                        printf("wscons detach %s\n", he.he_devname);
+                        break;
+                default:
+                        break;
+                }
+
+	}
+		
+	return 0;
+}