* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-#include "config.h"
-
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/un.h>
+#include <linux/netlink.h>
#include "libudev.h"
#include "libudev-private.h"
-#include "../udev.h"
struct udev_monitor {
struct udev *udev;
int refcount;
- int socket;
+ int sock;
+ struct sockaddr_nl snl;
+ struct sockaddr_un sun;
+ socklen_t addrlen;
};
/**
struct udev_monitor *udev_monitor_new_from_socket(struct udev *udev, const char *socket_path)
{
struct udev_monitor *udev_monitor;
- struct sockaddr_un saddr;
- socklen_t addrlen;
- const int on = 1;
+ struct stat statbuf;
if (udev == NULL)
return NULL;
udev_monitor->refcount = 1;
udev_monitor->udev = udev;
- memset(&saddr, 0x00, sizeof(saddr));
- saddr.sun_family = AF_LOCAL;
- strcpy(saddr.sun_path, socket_path);
- addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path);
-
- /* translate leading '@' to abstract namespace */
- if (saddr.sun_path[0] == '@')
- saddr.sun_path[0] = '\0';
-
- udev_monitor->socket = socket(AF_LOCAL, SOCK_DGRAM, 0);
- if (udev_monitor->socket == -1) {
- log_err(udev, "error getting socket: %s\n", strerror(errno));
+ udev_monitor->sun.sun_family = AF_LOCAL;
+ if (socket_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(socket_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");
free(udev_monitor);
return NULL;
}
+ info(udev, "monitor %p created with '%s'\n", udev_monitor, socket_path);
+ return udev_monitor;
+}
+
+struct udev_monitor *udev_monitor_new_from_netlink(struct udev *udev)
+{
+ struct udev_monitor *udev_monitor;
- if (bind(udev_monitor->socket, (struct sockaddr *) &saddr, addrlen) < 0) {
- log_err(udev, "bind failed: %s\n", strerror(errno));
- close(udev_monitor->socket);
+ if (udev == NULL)
+ return NULL;
+ udev_monitor = malloc(sizeof(struct udev_monitor));
+ if (udev_monitor == NULL)
+ return NULL;
+ memset(udev_monitor, 0x00, sizeof(struct udev_monitor));
+ udev_monitor->refcount = 1;
+ udev_monitor->udev = udev;
+
+ udev_monitor->sock = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT);
+ if (udev_monitor->sock == -1) {
+ err(udev, "error getting socket: %m\n");
free(udev_monitor);
return NULL;
}
- /* enable receiving of the sender credentials */
- setsockopt(udev_monitor->socket, SOL_SOCKET, SO_PASSCRED, &on, sizeof(on));
- log_info(udev_monitor->udev, "udev_monitor: %p created\n", udev_monitor);
+ udev_monitor->snl.nl_family = AF_NETLINK;
+ udev_monitor->snl.nl_pid = getpid();
+ udev_monitor->snl.nl_groups = 1;
+ info(udev, "monitor %p created with NETLINK_KOBJECT_UEVENT\n", udev_monitor);
return udev_monitor;
}
+int udev_monitor_enable_receiving(struct udev_monitor *udev_monitor)
+{
+ int err;
+ const int on = 1;
+
+ if (udev_monitor->snl.nl_family != 0) {
+ err = bind(udev_monitor->sock, (struct sockaddr *)&udev_monitor->snl, sizeof(struct sockaddr_nl));
+ if (err < 0) {
+ err(udev_monitor->udev, "bind failed: %m\n");
+ return err;
+ }
+ info(udev_monitor->udev, "monitor %p listening on netlink\n", udev_monitor);
+ } else if (udev_monitor->sun.sun_family != 0) {
+ err = bind(udev_monitor->sock, (struct sockaddr *)&udev_monitor->sun, udev_monitor->addrlen);
+ if (err < 0) {
+ err(udev_monitor->udev, "bind failed: %m\n");
+ return err;
+ }
+ /* enable receiving of the sender credentials */
+ setsockopt(udev_monitor->sock, SOL_SOCKET, SO_PASSCRED, &on, sizeof(on));
+ info(udev_monitor->udev, "monitor %p listening on socket\n", udev_monitor);
+ }
+ return 0;
+}
+
/**
* udev_monitor_ref:
* @udev_monitor: udev monitor
* udev_monitor_unref:
* @udev_monitor: udev monitor
*
- * Drop a reference of a udev monitor. If the refcount reaches zero,
+ * Drop a reference ofa udev monitor. If the refcount reaches zero,
* the bound socket will be closed, and the ressources of the monitor
* will be released.
*
udev_monitor->refcount--;
if (udev_monitor->refcount > 0)
return;
- close(udev_monitor->socket);
- log_info(udev_monitor->udev, "udev_monitor: %p released\n", udev_monitor);
+ if (udev_monitor->sock >= 0)
+ close(udev_monitor->sock);
+ info(udev_monitor->udev, "monitor %p released\n", udev_monitor);
free(udev_monitor);
}
* udev_monitor_get_udev:
* @udev_monitor: udev monitor
*
- * Retrieve the udev library context the device was created with.
+ * Retrieve the udev library context the monitor was created with.
*
* Returns: the udev library context
**/
{
if (udev_monitor == NULL)
return -1;
- return udev_monitor->socket;
+ return udev_monitor->sock;
}
/**
- * udev_monitor_get_device:
+ * udev_monitor_receive_device:
* @udev_monitor: udev monitor
*
- * Retrieve data from the udev monitor socket, allocate a new udev
- * device, and fill in the received data, and return the device.
+ * Receive data from the udev monitor socket, allocate a new udev
+ * device, fill in the received data, and return the device.
*
* Only socket connections with uid=0 are accepted. The caller
- * need to make sure, that there is data to read from the socket,
+ * needs to make sure, that there is data to read from the socket,
* the call will block until the socket becomes readable.
*
* The initial refcount is 1, and needs to be decremented to
*
* Returns: a new udev device, or #NULL, in case of an error
**/
-struct udev_device *udev_monitor_get_device(struct udev_monitor *udev_monitor)
+struct udev_device *udev_monitor_receive_device(struct udev_monitor *udev_monitor)
{
struct udev_device *udev_device;
struct msghdr smsg;
- struct cmsghdr *cmsg;
struct iovec iov;
- struct ucred *cred;
char cred_msg[CMSG_SPACE(sizeof(struct ucred))];
char buf[4096];
size_t bufpos;
+ int devpath_set = 0;
+ int subsystem_set = 0;
+ int action_set = 0;
+ int maj = 0;
+ int min = 0;
if (udev_monitor == NULL)
return NULL;
smsg.msg_control = cred_msg;
smsg.msg_controllen = sizeof(cred_msg);
- if (recvmsg(udev_monitor->socket, &smsg, 0) < 0) {
+ if (recvmsg(udev_monitor->sock, &smsg, 0) < 0) {
if (errno != EINTR)
- log_info(udev_monitor->udev, "unable to receive message");
+ info(udev_monitor->udev, "unable to receive message");
return NULL;
}
- cmsg = CMSG_FIRSTHDR(&smsg);
- cred = (struct ucred *)CMSG_DATA (cmsg);
- if (cmsg == NULL || cmsg->cmsg_type != SCM_CREDENTIALS) {
- log_info(udev_monitor->udev, "no sender credentials received, message ignored");
- return NULL;
- }
+ if (udev_monitor->sun.sun_family != 0) {
+ struct cmsghdr *cmsg = CMSG_FIRSTHDR(&smsg);
+ struct ucred *cred = (struct ucred *)CMSG_DATA (cmsg);
- if (cred->uid != 0) {
- log_info(udev_monitor->udev, "sender uid=%d, message ignored", cred->uid);
- return NULL;
+ if (cmsg == NULL || cmsg->cmsg_type != SCM_CREDENTIALS) {
+ info(udev_monitor->udev, "no sender credentials received, message ignored");
+ return NULL;
+ }
+
+ if (cred->uid != 0) {
+ info(udev_monitor->udev, "sender uid=%d, message ignored", cred->uid);
+ return NULL;
+ }
}
/* skip header */
bufpos = strlen(buf) + 1;
if (bufpos < sizeof("a@/d") || bufpos >= sizeof(buf)) {
- log_info(udev_monitor->udev, "invalid message length");
+ info(udev_monitor->udev, "invalid message length");
return NULL;
}
/* check message header */
if (strstr(buf, "@/") == NULL) {
- log_info(udev_monitor->udev, "unrecognized message header");
+ info(udev_monitor->udev, "unrecognized message header");
return NULL;
}
- udev_device = device_init(udev_monitor->udev);
+ udev_device = device_new(udev_monitor->udev);
if (udev_device == NULL) {
return NULL;
}
bufpos += keylen + 1;
if (strncmp(key, "DEVPATH=", 8) == 0) {
- udev_device->devpath = strdup(&key[8]);
+ char path[UTIL_PATH_SIZE];
+
+ util_strlcpy(path, udev_get_sys_path(udev_monitor->udev), sizeof(path));
+ util_strlcat(path, &key[8], sizeof(path));
+ udev_device_set_syspath(udev_device, path);
+ devpath_set = 1;
} else if (strncmp(key, "SUBSYSTEM=", 10) == 0) {
- udev_device->subsystem = strdup(&key[10]);
+ udev_device_set_subsystem(udev_device, &key[10]);
+ subsystem_set = 1;
} else if (strncmp(key, "DEVNAME=", 8) == 0) {
- udev_device->devname = strdup(&key[8]);
+ udev_device_set_devnode(udev_device, &key[8]);
} else if (strncmp(key, "DEVLINKS=", 9) == 0) {
- char *slink = &key[9];
- char *next = strchr(slink, ' ');
+ char devlinks[UTIL_PATH_SIZE];
+ char *slink;
+ char *next;
+ util_strlcpy(devlinks, &key[9], sizeof(devlinks));
+ slink = devlinks;
+ next = strchr(slink, ' ');
while (next != NULL) {
next[0] = '\0';
- name_list_add(&udev_device->link_list, slink, 0);
+ udev_device_add_devlink(udev_device, slink);
slink = &next[1];
next = strchr(slink, ' ');
}
if (slink[0] != '\0')
- name_list_add(&udev_device->link_list, slink, 0);
+ udev_device_add_devlink(udev_device, slink);
+ } else if (strncmp(key, "DRIVER=", 7) == 0) {
+ udev_device_set_driver(udev_device, &key[7]);
+ } else if (strncmp(key, "ACTION=", 7) == 0) {
+ udev_device_set_action(udev_device, &key[7]);
+ action_set = 1;
+ } else if (strncmp(key, "MAJOR=", 6) == 0) {
+ maj = strtoull(&key[6], NULL, 10);
+ } else if (strncmp(key, "MINOR=", 6) == 0) {
+ min = strtoull(&key[6], NULL, 10);
+ } else if (strncmp(key, "DEVPATH_OLD=", 12) == 0) {
+ udev_device_set_devpath_old(udev_device, &key[12]);
+ } else if (strncmp(key, "PHYSDEVPATH=", 12) == 0) {
+ udev_device_set_physdevpath(udev_device, &key[12]);
+ } else if (strncmp(key, "SEQNUM=", 7) == 0) {
+ udev_device_set_seqnum(udev_device, strtoull(&key[7], NULL, 10));
+ } else if (strncmp(key, "TIMEOUT=", 8) == 0) {
+ udev_device_set_timeout(udev_device, strtoull(&key[8], NULL, 10));
+ } else if (strncmp(key, "PHYSDEV", 7) == 0) {
+ /* skip deprecated values */
+ continue;
+ } else {
+ udev_device_add_property_from_string(udev_device, key);
}
- name_list_add(&udev_device->env_list, key, 0);
}
-
+ if (!devpath_set || !subsystem_set || !action_set) {
+ info(udev_monitor->udev, "missing values, skip\n");
+ udev_device_unref(udev_device);
+ return NULL;
+ }
+ udev_device_set_devnum(udev_device, makedev(maj, min));
+ 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 += snprintf(&buf[bufpos], sizeof(buf) - bufpos, "%s=%s",
+ udev_list_entry_get_name(list_entry),
+ udev_list_entry_get_value(list_entry));
+ 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;
+}
~ianmdlvl / elogind.git / blobdiff