socklen_t addrlen;
struct udev_list_node filter_subsystem_list;
struct udev_list_node filter_tag_list;
+ bool bound;
};
enum udev_monitor_netlink_group {
*
* Returns: a new udev monitor, or #NULL, in case of an error
**/
-struct udev_monitor *udev_monitor_new_from_socket(struct udev *udev, const char *socket_path)
+UDEV_EXPORT struct udev_monitor *udev_monitor_new_from_socket(struct udev *udev, const char *socket_path)
{
struct udev_monitor *udev_monitor;
struct stat statbuf;
util_strscpy(&udev_monitor->sun.sun_path[1], sizeof(udev_monitor->sun.sun_path)-1, socket_path);
udev_monitor->addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(socket_path)+1;
}
- udev_monitor->sock = socket(AF_LOCAL, SOCK_DGRAM|SOCK_CLOEXEC, 0);
+ udev_monitor->sock = socket(AF_LOCAL, SOCK_DGRAM|SOCK_NONBLOCK|SOCK_CLOEXEC, 0);
if (udev_monitor->sock == -1) {
err(udev, "error getting socket: %m\n");
free(udev_monitor);
return udev_monitor;
}
-/**
- * udev_monitor_new_from_netlink:
- * @udev: udev library context
- * @name: name of event source
- *
- * Create new udev monitor and connect to a specified event
- * source. Valid sources identifiers are "udev" and "kernel".
- *
- * Applications should usually not connect directly to the
- * "kernel" events, because the devices might not be useable
- * at that time, before udev has configured them, and created
- * device nodes.
- *
- * Accessing devices at the same time as udev, might result
- * in unpredictable behavior.
- *
- * The "udev" events are sent out after udev has finished its
- * event processing, all rules have been processed, and needed
- * device nodes are created.
- *
- * The initial refcount is 1, and needs to be decremented to
- * release the resources of the udev monitor.
- *
- * Returns: a new udev monitor, or #NULL, in case of an error
- **/
-struct udev_monitor *udev_monitor_new_from_netlink(struct udev *udev, const char *name)
+struct udev_monitor *udev_monitor_new_from_netlink_fd(struct udev *udev, const char *name, int fd)
{
struct udev_monitor *udev_monitor;
unsigned int group;
if (udev_monitor == NULL)
return NULL;
- udev_monitor->sock = socket(PF_NETLINK, SOCK_DGRAM|SOCK_CLOEXEC, NETLINK_KOBJECT_UEVENT);
- if (udev_monitor->sock == -1) {
- err(udev, "error getting socket: %m\n");
- free(udev_monitor);
- return NULL;
+ if (fd < 0) {
+ udev_monitor->sock = socket(PF_NETLINK, SOCK_RAW|SOCK_CLOEXEC|SOCK_NONBLOCK, NETLINK_KOBJECT_UEVENT);
+ if (udev_monitor->sock == -1) {
+ err(udev, "error getting socket: %m\n");
+ free(udev_monitor);
+ return NULL;
+ }
+ } else {
+ udev_monitor->bound = true;
+ udev_monitor->sock = fd;
}
udev_monitor->snl.nl_family = AF_NETLINK;
return udev_monitor;
}
+/**
+ * udev_monitor_new_from_netlink:
+ * @udev: udev library context
+ * @name: name of event source
+ *
+ * Create new udev monitor and connect to a specified event
+ * source. Valid sources identifiers are "udev" and "kernel".
+ *
+ * Applications should usually not connect directly to the
+ * "kernel" events, because the devices might not be useable
+ * at that time, before udev has configured them, and created
+ * device nodes.
+ *
+ * Accessing devices at the same time as udev, might result
+ * in unpredictable behavior.
+ *
+ * The "udev" events are sent out after udev has finished its
+ * event processing, all rules have been processed, and needed
+ * device nodes are created.
+ *
+ * The initial refcount is 1, and needs to be decremented to
+ * release the resources of the udev monitor.
+ *
+ * Returns: a new udev monitor, or #NULL, in case of an error
+ **/
+UDEV_EXPORT struct udev_monitor *udev_monitor_new_from_netlink(struct udev *udev, const char *name)
+{
+ return udev_monitor_new_from_netlink_fd(udev, name, -1);
+}
+
static inline void bpf_stmt(struct sock_filter *inss, unsigned int *i,
unsigned short code, unsigned int data)
{
*
* Returns: 0 on success, otherwise a negative error value.
*/
-int udev_monitor_filter_update(struct udev_monitor *udev_monitor)
+UDEV_EXPORT int udev_monitor_filter_update(struct udev_monitor *udev_monitor)
{
struct sock_filter ins[512];
struct sock_fprog filter;
bpf_stmt(ins, &i, BPF_RET|BPF_K, 0xffffffff);
/* install filter */
+ memset(&filter, 0x00, sizeof(filter));
filter.len = i;
filter.filter = ins;
err = setsockopt(udev_monitor->sock, SOL_SOCKET, SO_ATTACH_FILTER, &filter, sizeof(filter));
*
* Returns: 0 on success, otherwise a negative error value.
*/
-int udev_monitor_enable_receiving(struct udev_monitor *udev_monitor)
+UDEV_EXPORT int udev_monitor_enable_receiving(struct udev_monitor *udev_monitor)
{
- int err;
+ int err = 0;
const int on = 1;
if (udev_monitor->sun.sun_family != 0) {
- err = bind(udev_monitor->sock,
- (struct sockaddr *)&udev_monitor->sun, udev_monitor->addrlen);
+ if (!udev_monitor->bound) {
+ err = bind(udev_monitor->sock,
+ (struct sockaddr *)&udev_monitor->sun, udev_monitor->addrlen);
+ if (err == 0)
+ udev_monitor->bound = true;
+ }
} else if (udev_monitor->snl.nl_family != 0) {
udev_monitor_filter_update(udev_monitor);
- err = bind(udev_monitor->sock,
- (struct sockaddr *)&udev_monitor->snl, sizeof(struct sockaddr_nl));
+ if (!udev_monitor->bound) {
+ err = bind(udev_monitor->sock,
+ (struct sockaddr *)&udev_monitor->snl, sizeof(struct sockaddr_nl));
+ if (err == 0)
+ udev_monitor->bound = true;
+ }
if (err == 0) {
struct sockaddr_nl snl;
socklen_t addrlen;
*
* Returns: 0 on success, otherwise -1 on error.
*/
-int udev_monitor_set_receive_buffer_size(struct udev_monitor *udev_monitor, int size)
+UDEV_EXPORT int udev_monitor_set_receive_buffer_size(struct udev_monitor *udev_monitor, int size)
{
if (udev_monitor == NULL)
return -1;
*
* Returns: the passed udev monitor
**/
-struct udev_monitor *udev_monitor_ref(struct udev_monitor *udev_monitor)
+UDEV_EXPORT struct udev_monitor *udev_monitor_ref(struct udev_monitor *udev_monitor)
{
if (udev_monitor == NULL)
return NULL;
* will be released.
*
**/
-void udev_monitor_unref(struct udev_monitor *udev_monitor)
+UDEV_EXPORT void udev_monitor_unref(struct udev_monitor *udev_monitor)
{
if (udev_monitor == NULL)
return;
*
* Returns: the udev library context
**/
-struct udev *udev_monitor_get_udev(struct udev_monitor *udev_monitor)
+UDEV_EXPORT struct udev *udev_monitor_get_udev(struct udev_monitor *udev_monitor)
{
if (udev_monitor == NULL)
return NULL;
*
* Returns: the socket file descriptor
**/
-int udev_monitor_get_fd(struct udev_monitor *udev_monitor)
+UDEV_EXPORT int udev_monitor_get_fd(struct udev_monitor *udev_monitor)
{
if (udev_monitor == NULL)
return -1;
*
* Returns: a new udev device, or #NULL, in case of an error
**/
-struct udev_device *udev_monitor_receive_device(struct udev_monitor *udev_monitor)
+UDEV_EXPORT struct udev_device *udev_monitor_receive_device(struct udev_monitor *udev_monitor)
{
struct udev_device *udev_device;
struct msghdr smsg;
if (memcmp(buf, "libudev", 8) == 0) {
/* udev message needs proper version magic */
nlh = (struct udev_monitor_netlink_header *) buf;
- if (nlh->magic != htonl(UDEV_MONITOR_MAGIC))
+ if (nlh->magic != htonl(UDEV_MONITOR_MAGIC)) {
+ err(udev_monitor->udev, "ignored a message from an invalid release of udevadm (%x != %x)\n",
+ nlh->magic, htonl(UDEV_MONITOR_MAGIC));
return NULL;
+ }
if (nlh->properties_off+32 > buflen)
return NULL;
bufpos = nlh->properties_off;
*
* Returns: 0 on success, otherwise a negative error value.
*/
-int udev_monitor_filter_add_match_subsystem_devtype(struct udev_monitor *udev_monitor, const char *subsystem, const char *devtype)
+UDEV_EXPORT int udev_monitor_filter_add_match_subsystem_devtype(struct udev_monitor *udev_monitor, const char *subsystem, const char *devtype)
{
if (udev_monitor == NULL)
return -EINVAL;
if (subsystem == NULL)
return -EINVAL;
if (udev_list_entry_add(udev_monitor->udev,
- &udev_monitor->filter_subsystem_list, subsystem, devtype, 0, 0) == NULL)
+ &udev_monitor->filter_subsystem_list, subsystem, devtype, 0) == NULL)
return -ENOMEM;
return 0;
}
*
* Returns: 0 on success, otherwise a negative error value.
*/
-int udev_monitor_filter_add_match_tag(struct udev_monitor *udev_monitor, const char *tag)
+UDEV_EXPORT int udev_monitor_filter_add_match_tag(struct udev_monitor *udev_monitor, const char *tag)
{
if (udev_monitor == NULL)
return -EINVAL;
if (tag == NULL)
return -EINVAL;
if (udev_list_entry_add(udev_monitor->udev,
- &udev_monitor->filter_tag_list, tag, NULL, 0, 0) == NULL)
+ &udev_monitor->filter_tag_list, tag, NULL, 0) == NULL)
return -ENOMEM;
return 0;
}
*
* Returns: 0 on success, otherwise a negative error value.
*/
-int udev_monitor_filter_remove(struct udev_monitor *udev_monitor)
+UDEV_EXPORT int udev_monitor_filter_remove(struct udev_monitor *udev_monitor)
{
static struct sock_fprog filter = { 0, NULL };
~ianmdlvl / elogind.git / blobdiff