X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev-add.c;h=174331fadeae7318c24894e0fca79ace631d4e7b;hp=068fd46f2746bb299b2d5739fc5144556861ff22;hb=5aebfbcb62614fc2bf2b1579d62e3fe272c6751a;hpb=f3b04a2e0a041aa5546284c5bfc2022ab3e8b15f

diff --git a/udev-add.c b/udev-add.c
index 068fd46f2..174331fad 100644
--- a/udev-add.c
+++ b/udev-add.c
@@ -60,18 +60,82 @@ static int get_major_minor(struct sysfs_class_device *class_dev, struct udevice
 	if (dev == NULL)
 		goto exit;
 
-	dbg("dev = %s", dev);
+	dbg("dev='%s'", dev);
 
 	if (sscanf(dev, "%u:%u", &udev->major, &udev->minor) != 2)
 		goto exit;
 
-	dbg("found major = %d, minor = %d", udev->major, udev->minor);
+	dbg("found major=%d, minor=%d", udev->major, udev->minor);
 
 	retval = 0;
 exit:
 	return retval;
 }
 
+static int create_path(char *file)
+{
+	char p[NAME_SIZE];
+	char *pos;
+	int retval;
+	struct stat stats;
+	
+	strncpy(p, file, sizeof(p));
+	pos = strchr(p+1, '/');
+	while (1) {
+		pos = strchr(pos+1, '/');
+		if (pos == NULL)
+			break;
+		*pos = 0x00;
+		if (stat(p, &stats)) {
+			retval = mkdir(p, 0755);
+			if (retval) {
+				dbg("mkdir(%s) failed with error '%s'",
+				    p, strerror(errno));
+				return retval;
+			}
+			dbg("created '%s'", p);
+		}
+		*pos = '/';
+	}
+	return 0;
+}
+
+#ifdef USE_DBUS
+/** Send out a signal that a device node is created
+ *
+ *  @param  dev                 udevice object
+ *  @param  path                Sysfs path of device
+ */
+static void sysbus_send_create(struct udevice *dev, const char *path)
+{
+        char filename[255];
+        DBusMessage* message;
+        DBusMessageIter iter;
+
+        if (sysbus_connection == NULL)
+                return;
+
+        strncpy(filename, udev_root, sizeof(filename));
+        strncat(filename, dev->name, sizeof(filename));
+
+        /* object, interface, member */
+        message = dbus_message_new_signal("/org/kernel/udev/NodeMonitor", 
+                                          "org.kernel.udev.NodeMonitor",
+                                          "NodeCreated");
+        
+        dbus_message_iter_init(message, &iter);
+        dbus_message_iter_append_string(&iter, filename);
+        dbus_message_iter_append_string(&iter, path);
+
+        if ( !dbus_connection_send(sysbus_connection, message, NULL) )
+                dbg("error sending d-bus signal");
+
+        dbus_message_unref(message);
+        
+        dbus_connection_flush(sysbus_connection);
+}
+#endif /* USE_DBUS */
+
 /*
  * we possibly want to add some symlinks here
  * only numeric owner/group id's are supported
@@ -79,10 +143,14 @@ exit:
 static int create_node(struct udevice *dev)
 {
 	char filename[255];
+	char linktarget[255];
 	int retval = 0;
 	uid_t uid = 0;
 	gid_t gid = 0;
 	dev_t res;
+	int i;
+	int tail;
+
 
 	strncpy(filename, udev_root, sizeof(filename));
 	strncat(filename, dev->name, sizeof(filename));
@@ -109,31 +177,9 @@ static int create_node(struct udevice *dev)
 		return -EINVAL;
 	}
 
-	/* create subdirectories if requested */
-	if (strchr(dev->name, '/')) {
-		char path[255];
-		char *pos;
-		struct stat stats;
-
-		strncpy(path, filename, sizeof(path));
-		pos = strchr(path+1, '/');
-		while (1) {
-			pos = strchr(pos+1, '/');
-			if (pos == NULL)
-				break;
-			*pos = 0x00;
-			if (stat(path, &stats)) {
-				retval = mkdir(path, 0755);
-				if (retval) {
-					dbg("mkdir(%s) failed with error '%s'",
-					    path, strerror(errno));
-					return retval;
-				}
-				dbg("created %s", path);
-			}
-			*pos = '/';
-		}
-	}
+	/* create parent directories if needed */
+	if (strrchr(dev->name, '/'))
+		create_path(filename);
 
 	dbg("mknod(%s, %#o, %u, %u)", filename, dev->mode, dev->major, dev->minor);
 	retval = mknod(filename, dev->mode, res);
@@ -155,7 +201,7 @@ static int create_node(struct udevice *dev)
 		else {
 			struct passwd *pw = getpwnam(dev->owner);
 			if (!pw)
-				dbg("user unknown: %s", dev->owner);
+				dbg("user unknown '%s'", dev->owner);
 			else
 				uid = pw->pw_uid;
 		}
@@ -169,7 +215,7 @@ static int create_node(struct udevice *dev)
 		else {
 			struct group *gr = getgrnam(dev->group);
 			if (!gr)
-				dbg("group unknown: %s", dev->group);
+				dbg("group unknown '%s'", dev->group);
 			else
 				gid = gr->gr_gid;
 		}
@@ -179,8 +225,43 @@ static int create_node(struct udevice *dev)
 		dbg("chown(%s, %u, %u)", filename, uid, gid);
 		retval = chown(filename, uid, gid);
 		if (retval)
-			dbg("chown(%s, %u, %u) failed with error '%s'", filename,
-			    uid, gid, strerror(errno));
+			dbg("chown(%s, %u, %u) failed with error '%s'",
+			    filename, uid, gid, strerror(errno));
+	}
+
+
+	/* create symlink if requested */
+	if (*dev->symlink) {
+		strncpy(filename, udev_root, sizeof(filename));
+		strncat(filename, dev->symlink, sizeof(filename));
+		dbg("symlink '%s' to node '%s' requested", filename, dev->name);
+		if (strrchr(dev->symlink, '/'))
+			create_path(filename);
+
+		/* optimize relative link */
+		linktarget[0] = '\0';
+		i = 0;
+		tail = 0;
+		while ((dev->name[i] == dev->symlink[i]) && dev->name[i]) {
+			if (dev->name[i] == '/')
+				tail = i+1;
+			i++;
+		}
+		while (dev->symlink[i]) {
+			if (dev->symlink[i] == '/')
+				strcat(linktarget, "../");
+			i++;
+		}
+
+		if (*linktarget == '\0')
+			strcpy(linktarget, "./");
+		strcat(linktarget, &dev->name[tail]);
+
+		dbg("symlink(%s, %s)", linktarget, filename);
+		retval = symlink(linktarget, filename);
+		if (retval)
+			dbg("symlink(%s, %s) failed with error '%s'",
+			    linktarget, filename, strerror(errno));
 	}
 
 	return retval;
@@ -194,7 +275,7 @@ static struct sysfs_class_device *get_class_dev(char *device_name)
 	strcpy(dev_path, sysfs_path);
 	strcat(dev_path, device_name);
 
-	dbg("looking at %s", dev_path);
+	dbg("looking at '%s'", dev_path);
 
 	/* open up the sysfs class device for this thing... */
 	class_dev = sysfs_open_class_device(dev_path);
@@ -202,7 +283,7 @@ static struct sysfs_class_device *get_class_dev(char *device_name)
 		dbg ("sysfs_open_class_device failed");
 		goto exit;
 	}
-	dbg("class_dev->name = %s", class_dev->name);
+	dbg("class_dev->name='%s'", class_dev->name);
 
 exit:
 	return class_dev;
@@ -225,13 +306,12 @@ static int sleep_for_dev(char *path)
 	while (loop--) {
 		struct stat buf;
 
-		dbg("looking for %s", filename);
+		dbg("looking for '%s'", filename);
 		retval = stat(filename, &buf);
 		if (!retval)
 			goto exit;
 
-		/* sleep for a second or two to give the kernel a chance to
-		 * create the dev file */
+		/* sleep to give the kernel a chance to create the dev file */
 		sleep(1);
 	}
 	retval = -ENODEV;
@@ -276,13 +356,18 @@ int udev_add_device(char *path, char *subsystem)
 		dbg("udevdb_add_dev failed, but we are going to try to create the node anyway. "
 		    "But remove might not work properly for this device.");
 
-	dbg("name = %s", dev.name);
+	dbg("name='%s'", dev.name);
 	retval = create_node(&dev);
 
+#ifdef USE_DBUS
+        if (retval == 0) {
+                sysbus_send_create(&dev, path);
+        }
+#endif /* USE_DBUS */
+
 exit:
 	if (class_dev)
 		sysfs_close_class_device(class_dev);
 
 	return retval;
 }
-