-/*
- * libudev - interface to udev device information
- *
- * Copyright (C) 2008-2010 Kay Sievers <kay.sievers@vrfy.org>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- */
+/***
+ This file is part of systemd.
+
+ Copyright 2008-2012 Kay Sievers <kay@vrfy.org>
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
#include <stdio.h>
#include <stdlib.h>
return udev_monitor;
}
-/**
- * udev_monitor_new_from_socket:
- * @udev: udev library context
- * @socket_path: unix socket path
- *
- * This function is removed from libudev and will not do anything.
- *
- * Returns: #NULL
- **/
-struct udev_monitor *udev_monitor_new_from_socket(struct udev *udev, const char *socket_path);
-_public_ struct udev_monitor *udev_monitor_new_from_socket(struct udev *udev, const char *socket_path)
-{
- udev_err(udev, "udev_monitor_new_from_socket() does not do anything; please migrate to netlink\n");
- errno = ENOSYS;
- return NULL;
-}
-
struct udev_monitor *udev_monitor_new_from_netlink_fd(struct udev *udev, const char *name, int fd)
{
struct udev_monitor *udev_monitor;
* the bound socket will be closed, and the resources of the monitor
* will be released.
*
+ * Returns: the passed udev monitor if it has still an active reference, or #NULL otherwise.
**/
-_public_ void udev_monitor_unref(struct udev_monitor *udev_monitor)
+_public_ struct udev_monitor *udev_monitor_unref(struct udev_monitor *udev_monitor)
{
if (udev_monitor == NULL)
- return;
+ return NULL;
udev_monitor->refcount--;
if (udev_monitor->refcount > 0)
- return;
+ return udev_monitor;
if (udev_monitor->sock >= 0)
close(udev_monitor->sock);
udev_list_cleanup(&udev_monitor->filter_subsystem_list);
udev_list_cleanup(&udev_monitor->filter_tag_list);
free(udev_monitor);
+ return NULL;
}
/**
*
* Only socket connections with uid=0 are accepted.
*
+ * The monitor socket is by default set to NONBLOCK. A variant of poll() on
+ * the file descriptor returned by udev_monitor_get_fd() should to be used to
+ * wake up when new devices arrive, or alternatively the file descriptor
+ * switched into blocking mode.
+ *
* The initial refcount is 1, and needs to be decremented to
* release the resources of the udev device.
*
nlh->magic, htonl(UDEV_MONITOR_MAGIC));
return NULL;
}
- if (nlh->properties_off+32 > buflen)
+ if (nlh->properties_off+32 > (size_t)buflen)
return NULL;
bufpos = nlh->properties_off;
} else {