--- /dev/null
+/*
+ * udevcontrol.c
+ *
+ * Userspace devfs
+ *
+ * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation version 2 of the License.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+#include <sys/un.h>
+#include <time.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+#include <unistd.h>
+#include <linux/stddef.h>
+
+#include "udev.h"
+#include "udev_version.h"
+#include "udevd.h"
+#include "logging.h"
+
+/* global variables */
+static int sock = -1;
+
+#ifdef USE_LOG
+void log_message (int level, const char *format, ...)
+{
+ va_list args;
+
+ va_start(args, format);
+ vsyslog(level, format, args);
+ va_end(args);
+}
+#endif
+
+
+int main(int argc, char *argv[], char *envp[])
+{
+ static struct udevd_msg usend_msg;
+ struct sockaddr_un saddr;
+ socklen_t addrlen;
+ int retval = 1;
+
+ logging_init("udevcontrol");
+ dbg("version %s", UDEV_VERSION);
+
+ if (argc != 2) {
+ info("usage: udevcontrol <cmd>\n");
+ goto exit;
+ }
+
+ memset(&usend_msg, 0x00, sizeof(struct udevd_msg));
+ strcpy(usend_msg.magic, UDEV_MAGIC);
+
+ if (strstr(argv[1], "stop_exec_queue"))
+ usend_msg.type = UDEVD_STOP_EXEC_QUEUE;
+ else if (strstr(argv[1], "start_exec_queue"))
+ usend_msg.type = UDEVD_START_EXEC_QUEUE;
+ else {
+ info("unknown command\n");
+ goto exit;
+ }
+
+ sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
+ if (sock == -1) {
+ info("error getting socket");
+ goto exit;
+ }
+
+ memset(&saddr, 0x00, sizeof(struct sockaddr_un));
+ saddr.sun_family = AF_LOCAL;
+ /* use abstract namespace for socket path */
+ strcpy(&saddr.sun_path[1], UDEVD_SOCK_PATH);
+ addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path+1) + 1;
+
+
+ retval = sendto(sock, &usend_msg, sizeof(usend_msg), 0, (struct sockaddr *)&saddr, addrlen);
+ if (retval == -1)
+ info("error sending message (%s)", strerror(errno));
+
+ close(sock);
+
+exit:
+ logging_close();
+
+ return retval;
+}
#include "logging.h"
/* global variables*/
-static int udevsendsock;
-static int ueventsock;
+static int udevd_sock;
+static int uevent_nl_sock;
static pid_t sid;
static int pipefds[2];
static long startup_time;
-static unsigned long long expected_seqnum = 0;
+static unsigned long long expected_seqnum;
static volatile int sigchilds_waiting;
static volatile int run_msg_q;
static volatile int sig_flag;
static int run_exec_q;
+static int stop_exec_q;
static LIST_HEAD(msg_list);
static LIST_HEAD(exec_list);
static void msg_dump_queue(void)
{
#ifdef DEBUG
- struct hotplug_msg *msg;
+ struct uevent_msg *msg;
list_for_each_entry(msg, &msg_list, node)
dbg("sequence %llu in queue", msg->seqnum);
#endif
}
-static void run_queue_delete(struct hotplug_msg *msg)
+static void run_queue_delete(struct uevent_msg *msg)
{
list_del(&msg->node);
free(msg);
}
/* orders the message in the queue by sequence number */
-static void msg_queue_insert(struct hotplug_msg *msg)
+static void msg_queue_insert(struct uevent_msg *msg)
{
- struct hotplug_msg *loop_msg;
+ struct uevent_msg *loop_msg;
struct sysinfo info;
if (msg->seqnum == 0) {
}
/* forks event and removes event from run queue when finished */
-static void execute_udev(struct hotplug_msg *msg)
+static void execute_udev(struct uevent_msg *msg)
{
char *const argv[] = { "udev", msg->subsystem, NULL };
pid_t pid;
switch (pid) {
case 0:
/* child */
- if (ueventsock != -1)
- close(ueventsock);
- close(udevsendsock);
+ if (uevent_nl_sock != -1)
+ close(uevent_nl_sock);
+ close(udevd_sock);
logging_close();
setpriority(PRIO_PROCESS, 0, UDEV_PRIORITY);
}
/* returns still running task for the same device, its parent or its physical device */
-static struct hotplug_msg *running_with_devpath(struct hotplug_msg *msg)
+static struct uevent_msg *running_with_devpath(struct uevent_msg *msg)
{
- struct hotplug_msg *loop_msg;
+ struct uevent_msg *loop_msg;
if (msg->devpath == NULL)
return NULL;
/* exec queue management routine executes the events and serializes events in the same sequence */
static void exec_queue_manager(void)
{
- struct hotplug_msg *loop_msg;
- struct hotplug_msg *tmp_msg;
- struct hotplug_msg *msg;
+ struct uevent_msg *loop_msg;
+ struct uevent_msg *tmp_msg;
+ struct uevent_msg *msg;
int running;
running = running_processes();
}
}
-static void msg_move_exec(struct hotplug_msg *msg)
+static void msg_move_exec(struct uevent_msg *msg)
{
list_move_tail(&msg->node, &exec_list);
run_exec_q = 1;
/* msg queue management routine handles the timeouts and dispatches the events */
static void msg_queue_manager(void)
{
- struct hotplug_msg *loop_msg;
- struct hotplug_msg *tmp_msg;
+ struct uevent_msg *loop_msg;
+ struct uevent_msg *tmp_msg;
struct sysinfo info;
long msg_age = 0;
static int timeout = EVENT_INIT_TIMEOUT_SEC;
}
}
-static struct hotplug_msg *get_msg_from_envbuf(const char *buf, int buf_size)
+static struct uevent_msg *get_msg_from_envbuf(const char *buf, int buf_size)
{
int bufpos;
int i;
- struct hotplug_msg *msg;
+ struct uevent_msg *msg;
- msg = malloc(sizeof(struct hotplug_msg) + buf_size);
+ msg = malloc(sizeof(struct uevent_msg) + buf_size);
if (msg == NULL)
return NULL;
- memset(msg, 0x00, sizeof(struct hotplug_msg) + buf_size);
+ memset(msg, 0x00, sizeof(struct uevent_msg) + buf_size);
/* copy environment buffer and reconstruct envp */
memcpy(msg->envbuf, buf, buf_size);
bufpos = 0;
- for (i = 0; (bufpos < buf_size) && (i < HOTPLUG_NUM_ENVP-2); i++) {
+ for (i = 0; (bufpos < buf_size) && (i < UEVENT_NUM_ENVP-2); i++) {
int keylen;
char *key;
return msg;
}
-/* receive the udevsend message and do some sanity checks */
-static struct hotplug_msg *get_udevsend_msg(void)
+/* receive the udevd message from userspace */
+static struct uevent_msg *get_udevd_msg(void)
{
- static struct udevsend_msg usend_msg;
- struct hotplug_msg *msg;
+ static struct udevd_msg usend_msg;
+ struct uevent_msg *msg;
ssize_t size;
struct msghdr smsg;
struct cmsghdr *cmsg;
char cred_msg[CMSG_SPACE(sizeof(struct ucred))];
int envbuf_size;
- memset(&usend_msg, 0x00, sizeof(struct udevsend_msg));
+ memset(&usend_msg, 0x00, sizeof(struct udevd_msg));
iov.iov_base = &usend_msg;
- iov.iov_len = sizeof(struct udevsend_msg);
+ iov.iov_len = sizeof(struct udevd_msg);
memset(&smsg, 0x00, sizeof(struct msghdr));
smsg.msg_iov = &iov;
smsg.msg_control = cred_msg;
smsg.msg_controllen = sizeof(cred_msg);
- size = recvmsg(udevsendsock, &smsg, 0);
+ size = recvmsg(udevd_sock, &smsg, 0);
if (size < 0) {
if (errno != EINTR)
- dbg("unable to receive udevsend message");
+ dbg("unable to receive udevd message");
return NULL;
}
cmsg = CMSG_FIRSTHDR(&smsg);
return NULL;
}
- envbuf_size = size - offsetof(struct udevsend_msg, envbuf);
- dbg("envbuf_size=%i", envbuf_size);
- msg = get_msg_from_envbuf(usend_msg.envbuf, envbuf_size);
- if (msg == NULL)
- return NULL;
-
- return msg;
+switch (usend_msg.type) {
+ case UDEVD_UEVENT:
+ dbg("udevd message (UEVENT) received");
+ envbuf_size = size - offsetof(struct udevd_msg, envbuf);
+ dbg("envbuf_size=%i", envbuf_size);
+ msg = get_msg_from_envbuf(usend_msg.envbuf, envbuf_size);
+ if (msg == NULL)
+ return NULL;
+ return msg;
+ case UDEVD_STOP_EXEC_QUEUE:
+ dbg("udevd message (STOP_EXEC_QUEUE) received");
+ stop_exec_q = 1;
+ break;
+ case UDEVD_START_EXEC_QUEUE:
+ dbg("udevd message (START_EXEC_QUEUE) received");
+ stop_exec_q = 0;
+ exec_queue_manager();
+ break;
+ default:
+ dbg("unknown message type");
+ }
+ return NULL;
}
/* receive the kernel user event message and do some sanity checks */
-static struct hotplug_msg *get_uevent_msg(void)
+static struct uevent_msg *get_uevent_msg(void)
{
- struct hotplug_msg *msg;
+ struct uevent_msg *msg;
int bufpos;
ssize_t size;
- static char buffer[HOTPLUG_BUFFER_SIZE + 512];
+ static char buffer[UEVENT_BUFFER_SIZE + 512];
char *pos;
- size = recv(ueventsock, &buffer, sizeof(buffer), 0);
+ size = recv(uevent_nl_sock, &buffer, sizeof(buffer), 0);
if (size < 0) {
if (errno != EINTR)
- dbg("unable to receive udevsend message");
+ dbg("unable to receive udevd message");
return NULL;
}
static void udev_done(int pid)
{
/* find msg associated with pid and delete it */
- struct hotplug_msg *msg;
+ struct uevent_msg *msg;
list_for_each_entry(msg, &running_list, node) {
if (msg->pid == pid) {
}
}
-static int init_udevsend_socket(void)
+static int init_udevd_socket(void)
{
struct sockaddr_un saddr;
socklen_t addrlen;
strcpy(&saddr.sun_path[1], UDEVD_SOCK_PATH);
addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path+1) + 1;
- udevsendsock = socket(AF_LOCAL, SOCK_DGRAM, 0);
- if (udevsendsock == -1) {
+ udevd_sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
+ if (udevd_sock == -1) {
err("error getting socket, %s", strerror(errno));
return -1;
}
/* the bind takes care of ensuring only one copy running */
- retval = bind(udevsendsock, (struct sockaddr *) &saddr, addrlen);
+ retval = bind(udevd_sock, (struct sockaddr *) &saddr, addrlen);
if (retval < 0) {
err("bind failed, %s", strerror(errno));
- close(udevsendsock);
+ close(udevd_sock);
return -1;
}
/* enable receiving of the sender credentials */
- setsockopt(udevsendsock, SOL_SOCKET, SO_PASSCRED, &feature_on, sizeof(feature_on));
+ setsockopt(udevd_sock, SOL_SOCKET, SO_PASSCRED, &feature_on, sizeof(feature_on));
return 0;
}
-static int init_uevent_socket(void)
+static int init_uevent_nl_sock(void)
{
struct sockaddr_nl snl;
int retval;
snl.nl_pid = getpid();
snl.nl_groups = 0xffffffff;
- ueventsock = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT);
- if (ueventsock == -1) {
+ uevent_nl_sock = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT);
+ if (uevent_nl_sock == -1) {
dbg("error getting socket, %s", strerror(errno));
return -1;
}
- retval = bind(ueventsock, (struct sockaddr *) &snl,
+ retval = bind(uevent_nl_sock, (struct sockaddr *) &snl,
sizeof(struct sockaddr_nl));
if (retval < 0) {
dbg("bind failed, %s", strerror(errno));
- close(ueventsock);
- ueventsock = -1;
+ close(uevent_nl_sock);
+ uevent_nl_sock = -1;
return -1;
}
struct sigaction act;
fd_set readfds;
const char *udevd_expected_seqnum;
- int uevent_active = 0;
+ int uevent_nl_active = 0;
logging_init("udevd");
udev_init_config();
sigaction(SIGALRM, &act, NULL);
sigaction(SIGCHLD, &act, NULL);
- if (init_uevent_socket() < 0) {
+ if (init_uevent_nl_sock() < 0) {
dbg("uevent socket not available");
}
- if (init_udevsend_socket() < 0) {
+ if (init_udevd_socket() < 0) {
if (errno == EADDRINUSE)
dbg("another udevd running, exit");
else
- dbg("error initialising udevsend socket: %s", strerror(errno));
+ dbg("error initialising udevd socket: %s", strerror(errno));
goto exit;
}
startup_time = info.uptime;
FD_ZERO(&readfds);
- FD_SET(udevsendsock, &readfds);
- if (ueventsock != -1)
- FD_SET(ueventsock, &readfds);
+ FD_SET(udevd_sock, &readfds);
+ if (uevent_nl_sock != -1)
+ FD_SET(uevent_nl_sock, &readfds);
FD_SET(pipefds[0], &readfds);
- maxsockplus = udevsendsock+1;
+ maxsockplus = udevd_sock+1;
while (1) {
- struct hotplug_msg *msg;
+ struct uevent_msg *msg;
fd_set workreadfds = readfds;
retval = select(maxsockplus, &workreadfds, NULL, NULL, NULL);
continue;
}
- if (FD_ISSET(udevsendsock, &workreadfds)) {
- msg = get_udevsend_msg();
+ if (FD_ISSET(udevd_sock, &workreadfds)) {
+ msg = get_udevd_msg();
if (msg) {
/* discard kernel messages if netlink is active */
- if (uevent_active && msg->seqnum != 0) {
- dbg("skip kernel udevsend message, netlink is active");
+ if (uevent_nl_active && msg->seqnum != 0) {
+ dbg("skip uevent_helper message, netlink is active");
free(msg);
continue;
}
}
}
- if (FD_ISSET(ueventsock, &workreadfds)) {
+ if (FD_ISSET(uevent_nl_sock, &workreadfds)) {
msg = get_uevent_msg();
if (msg) {
msg_queue_insert(msg);
/* disable udevsend with first netlink message */
- if (!uevent_active) {
- info("netlink message received, disable kernel udevsend messages");
- uevent_active = 1;
+ if (!uevent_nl_active) {
+ info("uevent_nl message received, disable uevent_helper messages");
+ uevent_nl_active = 1;
}
}
}
}
run_exec_q = 0;
- exec_queue_manager();
+ if (!stop_exec_q)
+ exec_queue_manager();
}
}
~ianmdlvl / elogind.git / commitdiff