From 9925ab0451b307b5766b12134bdc178e4c89f297 Mon Sep 17 00:00:00 2001
From: Kay Sievers <kay.sievers@vrfy.org>
Date: Thu, 9 Oct 2008 23:38:30 +0200
Subject: [PATCH] libudev: add udev_monitor_send_device()

---
 udev/lib/libudev-device.c  |  1 +
 udev/lib/libudev-monitor.c | 46 +++++++++++++++++++++++++++++++++-----
 udev/lib/libudev-private.h |  3 +++
 3 files changed, 44 insertions(+), 6 deletions(-)

diff --git a/udev/lib/libudev-device.c b/udev/lib/libudev-device.c
index 62f351883..c27290835 100644
--- a/udev/lib/libudev-device.c
+++ b/udev/lib/libudev-device.c
@@ -913,6 +913,7 @@ int udev_device_add_property_from_string(struct udev_device *udev_device, const
 
 int udev_device_set_action(struct udev_device *udev_device, const char *action)
 {
+	udev_device_add_property(udev_device, "ACTION", action);
 	udev_device->action = strdup(action);
 	if (udev_device->action == NULL)
 		return -ENOMEM;
diff --git a/udev/lib/libudev-monitor.c b/udev/lib/libudev-monitor.c
index fc87cba4a..bca7ab32b 100644
--- a/udev/lib/libudev-monitor.c
+++ b/udev/lib/libudev-monitor.c
@@ -61,6 +61,7 @@ struct udev_monitor {
 struct udev_monitor *udev_monitor_new_from_socket(struct udev *udev, const char *socket_path)
 {
 	struct udev_monitor *udev_monitor;
+	struct stat statbuf;
 
 	if (udev == NULL)
 		return NULL;
@@ -74,13 +75,20 @@ struct udev_monitor *udev_monitor_new_from_socket(struct udev *udev, const char
 	udev_monitor->udev = udev;
 
 	udev_monitor->sun.sun_family = AF_LOCAL;
-	strcpy(udev_monitor->sun.sun_path, socket_path);
-	udev_monitor->addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(udev_monitor->sun.sun_path);
-
-	/* translate leading '@' to abstract namespace */
-	if (udev_monitor->sun.sun_path[0] == '@')
+	if (udev_monitor->sun.sun_path[0] == '@') {
+		/* translate leading '@' to abstract namespace */
+		util_strlcpy(udev_monitor->sun.sun_path, socket_path, sizeof(udev_monitor->sun.sun_path));
 		udev_monitor->sun.sun_path[0] = '\0';
-
+		udev_monitor->addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(socket_path);
+	} else if (stat(udev_monitor->sun.sun_path, &statbuf) == 0 && S_ISSOCK(statbuf.st_mode)) {
+		/* existing socket file */
+		util_strlcpy(udev_monitor->sun.sun_path, socket_path, sizeof(udev_monitor->sun.sun_path));
+		udev_monitor->addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(socket_path);
+	} else {
+		/* no socket file, assume abstract namespace socket */
+		util_strlcpy(&udev_monitor->sun.sun_path[1], socket_path, sizeof(udev_monitor->sun.sun_path)-1);
+		udev_monitor->addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(socket_path)+1;
+	}
 	udev_monitor->sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
 	if (udev_monitor->sock == -1) {
 		err(udev, "error getting socket: %m\n");
@@ -347,3 +355,29 @@ struct udev_device *udev_monitor_receive_device(struct udev_monitor *udev_monito
 	udev_device_set_info_loaded(udev_device);
 	return udev_device;
 }
+
+int udev_monitor_send_device(struct udev_monitor *udev_monitor, struct udev_device *udev_device)
+{
+	const char *action;
+	struct udev_list_entry *list_entry;
+	char buf[4096];
+	size_t bufpos;
+	ssize_t count;
+
+	action = udev_device_get_action(udev_device);
+	if (action == NULL)
+		return -EINVAL;
+	bufpos = snprintf(buf, sizeof(buf), "%s@%s", action, udev_device_get_devpath(udev_device));
+	bufpos++;
+	udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device)) {
+		bufpos += util_strlcpy(&buf[bufpos],
+				       udev_list_entry_get_name(list_entry),
+				       sizeof(buf) - bufpos);
+		bufpos++;
+	}
+	count = sendto(udev_monitor->sock,
+		       &buf, bufpos, 0,
+		       (struct sockaddr *)&udev_monitor->sun, udev_monitor->addrlen);
+	info(udev_monitor->udev, "passed %zi bytes to monitor %p, \n", count, udev_monitor);
+	return count;
+}
diff --git a/udev/lib/libudev-private.h b/udev/lib/libudev-private.h
index 1ba022031..9969b3721 100644
--- a/udev/lib/libudev-private.h
+++ b/udev/lib/libudev-private.h
@@ -76,6 +76,9 @@ extern int udev_device_get_ignore_remove(struct udev_device *udev_device);
 extern int udev_device_set_ignore_remove(struct udev_device *udev_device, int ignore);
 extern void udev_device_set_info_loaded(struct udev_device *device);
 
+/* libudev-monitor - netlink/unix socket communication  */
+extern int udev_monitor_send_device(struct udev_monitor *udev_monitor, struct udev_device *udev_device);
+
 /* libudev-ctrl - daemon runtime setup */
 struct udev_ctrl;
 extern struct udev_ctrl *udev_ctrl_new_from_socket(struct udev *udev, const char *socket_path);
-- 
2.30.2