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Created cdrom_id program to make it easier to determine cdrom types
[elogind.git]
/
udevd.c
diff --git
a/udevd.c
b/udevd.c
index 8782c615e325878bb7a7701a2f480209c82a7840..1575da8d5a3005c217f40431091a087bc6e59407 100644
(file)
--- a/
udevd.c
+++ b/
udevd.c
@@
-1,5
+1,5
@@
/*
/*
- * udevd.c -
hotplug event
serializer
+ * udevd.c -
event listener and
serializer
*
* Copyright (C) 2004-2005 Kay Sievers <kay.sievers@vrfy.org>
* Copyright (C) 2004 Chris Friesen <chris_friesen@sympatico.ca>
*
* Copyright (C) 2004-2005 Kay Sievers <kay.sievers@vrfy.org>
* Copyright (C) 2004 Chris Friesen <chris_friesen@sympatico.ca>
@@
-38,6
+38,7
@@
#include <sys/un.h>
#include <sys/sysinfo.h>
#include <sys/stat.h>
#include <sys/un.h>
#include <sys/sysinfo.h>
#include <sys/stat.h>
+#include <linux/types.h>
#include <linux/netlink.h>
#include "list.h"
#include <linux/netlink.h>
#include "list.h"
@@
-48,19
+49,16
@@
#include "udevd.h"
#include "logging.h"
#include "udevd.h"
#include "logging.h"
-#ifndef NETLINK_KOBJECT_UEVENT
-#define NETLINK_KOBJECT_UEVENT 15
-#endif
-
/* global variables*/
static int udevd_sock;
static int uevent_netlink_sock;
static pid_t sid;
/* global variables*/
static int udevd_sock;
static int uevent_netlink_sock;
static pid_t sid;
-static int pipefds[2];
+static int pipefds[2]
= {-1, -1}
;
static volatile int sigchilds_waiting;
static volatile int run_msg_q;
static volatile int sig_flag;
static volatile int sigchilds_waiting;
static volatile int run_msg_q;
static volatile int sig_flag;
+static volatile int udev_exit;
static int init_phase = 1;
static int run_exec_q;
static int stop_exec_q;
static int init_phase = 1;
static int run_exec_q;
static int stop_exec_q;
@@
-167,7
+165,7
@@
static void msg_queue_insert(struct uevent_msg *msg)
}
/* forks event and removes event from run queue when finished */
}
/* forks event and removes event from run queue when finished */
-static void
execute_udev
(struct uevent_msg *msg)
+static void
udev_event_fork
(struct uevent_msg *msg)
{
char *const argv[] = { "udev", msg->subsystem, NULL };
pid_t pid;
{
char *const argv[] = { "udev", msg->subsystem, NULL };
pid_t pid;
@@
-181,12
+179,10
@@
static void execute_udev(struct uevent_msg *msg)
close(uevent_netlink_sock);
close(udevd_sock);
logging_close();
close(uevent_netlink_sock);
close(udevd_sock);
logging_close();
-
setpriority(PRIO_PROCESS, 0, UDEV_PRIORITY);
execve(udev_bin, argv, msg->envp);
err("exec of child failed");
_exit(1);
setpriority(PRIO_PROCESS, 0, UDEV_PRIORITY);
execve(udev_bin, argv, msg->envp);
err("exec of child failed");
_exit(1);
- break;
case -1:
err("fork of child failed");
msg_queue_delete(msg);
case -1:
err("fork of child failed");
msg_queue_delete(msg);
@@
-389,7
+385,7
@@
static void exec_queue_manager(void)
if (running_with_devpath(loop_msg, max_childs) == 0) {
/* move event to run list */
list_move_tail(&loop_msg->node, &running_list);
if (running_with_devpath(loop_msg, max_childs) == 0) {
/* move event to run list */
list_move_tail(&loop_msg->node, &running_list);
-
execute_udev
(loop_msg);
+
udev_event_fork
(loop_msg);
running++;
dbg("moved seq %llu to running list", loop_msg->seqnum);
} else
running++;
dbg("moved seq %llu to running list", loop_msg->seqnum);
} else
@@
-646,23
+642,20
@@
static void asmlinkage sig_handler(int signum)
switch (signum) {
case SIGINT:
case SIGTERM:
switch (signum) {
case SIGINT:
case SIGTERM:
-
exit(20 + signum)
;
+
udev_exit = 1
;
break;
case SIGALRM:
/* set flag, then write to pipe if needed */
run_msg_q = 1;
break;
case SIGALRM:
/* set flag, then write to pipe if needed */
run_msg_q = 1;
- goto do_write;
break;
case SIGCHLD:
/* set flag, then write to pipe if needed */
sigchilds_waiting = 1;
break;
case SIGCHLD:
/* set flag, then write to pipe if needed */
sigchilds_waiting = 1;
- goto do_write;
break;
}
break;
}
-do_write:
- /* if pipe is empty, write to pipe to force select to return
- * immediately when it gets called
+ /* if pipe is empty, write to pipe to force select to return,
+ * which will wakeup our mainloop
*/
if (!sig_flag) {
rc = write(pipefds[1],&signum,sizeof(signum));
*/
if (!sig_flag) {
rc = write(pipefds[1],&signum,sizeof(signum));
@@
-722,6
+715,7
@@
static void user_sighandler(void)
static int init_udevd_socket(void)
{
struct sockaddr_un saddr;
static int init_udevd_socket(void)
{
struct sockaddr_un saddr;
+ const int buffersize = 1024 * 1024;
socklen_t addrlen;
const int feature_on = 1;
int retval;
socklen_t addrlen;
const int feature_on = 1;
int retval;
@@
-738,6
+732,9
@@
static int init_udevd_socket(void)
return -1;
}
return -1;
}
+ /* set receive buffersize */
+ setsockopt(udevd_sock, SOL_SOCKET, SO_RCVBUF, &buffersize, sizeof(buffersize));
+
/* the bind takes care of ensuring only one copy running */
retval = bind(udevd_sock, (struct sockaddr *) &saddr, addrlen);
if (retval < 0) {
/* the bind takes care of ensuring only one copy running */
retval = bind(udevd_sock, (struct sockaddr *) &saddr, addrlen);
if (retval < 0) {
@@
-755,6
+752,7
@@
static int init_udevd_socket(void)
static int init_uevent_netlink_sock(void)
{
struct sockaddr_nl snl;
static int init_uevent_netlink_sock(void)
{
struct sockaddr_nl snl;
+ const int buffersize = 1024 * 1024;
int retval;
memset(&snl, 0x00, sizeof(struct sockaddr_nl));
int retval;
memset(&snl, 0x00, sizeof(struct sockaddr_nl));
@@
-768,6
+766,9
@@
static int init_uevent_netlink_sock(void)
return -1;
}
return -1;
}
+ /* set receive buffersize */
+ setsockopt(uevent_netlink_sock, SOL_SOCKET, SO_RCVBUF, &buffersize, sizeof(buffersize));
+
retval = bind(uevent_netlink_sock, (struct sockaddr *) &snl,
sizeof(struct sockaddr_nl));
if (retval < 0) {
retval = bind(uevent_netlink_sock, (struct sockaddr *) &snl,
sizeof(struct sockaddr_nl));
if (retval < 0) {
@@
-836,17
+837,16
@@
int main(int argc, char *argv[], char *envp[])
chdir("/");
umask(umask(077) | 022);
chdir("/");
umask(umask(077) | 022);
- /*set a reasonable scheduling priority for the daemon */
+ /*
set a reasonable scheduling priority for the daemon */
setpriority(PRIO_PROCESS, 0, UDEVD_PRIORITY);
/* Set fds to dev/null */
fd = open( "/dev/null", O_RDWR );
if (fd >= 0) {
setpriority(PRIO_PROCESS, 0, UDEVD_PRIORITY);
/* Set fds to dev/null */
fd = open( "/dev/null", O_RDWR );
if (fd >= 0) {
- dup2(fd, 0);
- dup2(fd, 1);
- dup2(fd, 2);
- if (fd > 2)
- close(fd);
+ dup2(fd, STDIN_FILENO);
+ dup2(fd, STDOUT_FILENO);
+ dup2(fd, STDERR_FILENO);
+ close(fd);
} else
err("error opening /dev/null %s", strerror(errno));
} else
err("error opening /dev/null %s", strerror(errno));
@@
-884,6
+884,7
@@
int main(int argc, char *argv[], char *envp[])
sigaction(SIGTERM, &act, NULL);
sigaction(SIGALRM, &act, NULL);
sigaction(SIGCHLD, &act, NULL);
sigaction(SIGTERM, &act, NULL);
sigaction(SIGALRM, &act, NULL);
sigaction(SIGCHLD, &act, NULL);
+ sigaction(SIGHUP, &act, NULL);
if (init_uevent_netlink_sock() < 0) {
dbg("uevent socket not available");
if (init_uevent_netlink_sock() < 0) {
dbg("uevent socket not available");
@@
-938,11
+939,11
@@
int main(int argc, char *argv[], char *envp[])
FD_ZERO(&readfds);
FD_SET(udevd_sock, &readfds);
FD_ZERO(&readfds);
FD_SET(udevd_sock, &readfds);
- if (uevent_netlink_sock
!= -1
)
+ if (uevent_netlink_sock
> 0
)
FD_SET(uevent_netlink_sock, &readfds);
FD_SET(pipefds[0], &readfds);
maxsockplus = udevd_sock+1;
FD_SET(uevent_netlink_sock, &readfds);
FD_SET(pipefds[0], &readfds);
maxsockplus = udevd_sock+1;
- while (
1
) {
+ while (
!udev_exit
) {
struct uevent_msg *msg;
fd_set workreadfds = readfds;
struct uevent_msg *msg;
fd_set workreadfds = readfds;
@@
-954,6
+955,7
@@
int main(int argc, char *argv[], char *envp[])
continue;
}
continue;
}
+ /* get user socket message */
if (FD_ISSET(udevd_sock, &workreadfds)) {
msg = get_udevd_msg();
if (msg) {
if (FD_ISSET(udevd_sock, &workreadfds)) {
msg = get_udevd_msg();
if (msg) {
@@
-967,6
+969,7
@@
int main(int argc, char *argv[], char *envp[])
}
}
}
}
+ /* get kernel netlink message */
if (FD_ISSET(uevent_netlink_sock, &workreadfds)) {
msg = get_netlink_msg();
if (msg) {
if (FD_ISSET(uevent_netlink_sock, &workreadfds)) {
msg = get_netlink_msg();
if (msg) {
@@
-979,9
+982,11
@@
int main(int argc, char *argv[], char *envp[])
}
}
}
}
+ /* received a signal, clear our notification pipe */
if (FD_ISSET(pipefds[0], &workreadfds))
user_sighandler();
if (FD_ISSET(pipefds[0], &workreadfds))
user_sighandler();
+ /* forked child have returned */
if (sigchilds_waiting) {
sigchilds_waiting = 0;
reap_sigchilds();
if (sigchilds_waiting) {
sigchilds_waiting = 0;
reap_sigchilds();
@@
-1006,6
+1011,18
@@
int main(int argc, char *argv[], char *envp[])
}
exit:
}
exit:
+ if (pipefds[0] > 0)
+ close(pipefds[0]);
+ if (pipefds[1] > 0)
+ close(pipefds[1]);
+
+ if (udevd_sock > 0)
+ close(udevd_sock);
+
+ if (uevent_netlink_sock > 0)
+ close(uevent_netlink_sock);
+
logging_close();
logging_close();
- return 1;
+
+ return 0;
}
}