/*
* Copyright (C) 2004-2008 Kay Sievers <kay.sievers@vrfy.org>
* Copyright (C) 2004 Chris Friesen <chris_friesen@sympatico.ca>
+ * Copyright (C) 2009 Canonical Ltd.
+ * Copyright (C) 2009 Scott James Remnant <scott@netsplit.com>
*
* 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
static volatile int udev_exit;
static volatile int reload_config;
static volatile int signal_received;
+static volatile pid_t settle_pid;
static int run_exec_q;
static int stop_exec_q;
static int max_childs;
switch (pid) {
case 0:
/* child */
- udev_monitor_unref(kernel_monitor);
udev_ctrl_unref(udev_ctrl);
logging_close();
logging_init("udevd-event");
/* set timeout to prevent hanging processes */
alarm(UDEV_EVENT_TIMEOUT);
- /* clear any existing udev watch on the node */
- udev_watch_clear(event->udev, event->dev);
-
/* apply rules, create node, symlinks */
err = udev_event_execute_rules(event, rules);
udev_event_execute_run(event);
/* apply/restore inotify watch */
- if (err == 0 && event->inotify_watch &&
- strcmp(udev_device_get_action(event->dev), "remove") != 0)
- info(event->udev, "device will be watched for changes\n");
+ if (err == 0 && event->inotify_watch) {
udev_watch_begin(event->udev, event->dev);
+ udev_device_update_db(event->dev);
+ }
+
+ /* send processed event back to the kernel netlink socket */
+ udev_monitor_send_device(kernel_monitor, event->dev);
info(event->udev, "seq %llu exit with %i\n", udev_device_get_seqnum(event->dev), err);
logging_close();
static int mem_size_mb(void)
{
- FILE* f;
+ FILE *f;
char buf[4096];
long int memsize = -1;
info(udev, "udevd message (SET_MAX_CHILDS) received, max_childs=%i\n", i);
max_childs = i;
}
+
+ settle_pid = udev_ctrl_get_settle(ctrl_msg);
+ if (settle_pid > 0) {
+ info(udev, "udevd message (SETTLE) received\n");
+ }
udev_ctrl_msg_unref(ctrl_msg);
}
read(inotify_fd, buf, nbytes);
- for (pos = 0, ev = (struct inotify_event *)(buf + pos); pos < nbytes; pos += sizeof(struct inotify_event) + ev->len) {
- const char *syspath;
+ for (pos = 0; pos < nbytes; pos += sizeof(struct inotify_event) + ev->len) {
+ struct udev_device *dev;
- dbg(udev, "inotify event: %x for %d (%s)\n", ev->mask, ev->wd, ev->len ? ev->name : "*");
+ ev = (struct inotify_event *)(buf + pos);
+ if (ev->len) {
+ dbg(udev, "inotify event: %x for %s\n", ev->mask, ev->name);
+ reload_config = 1;
+ continue;
+ }
- syspath = udev_watch_lookup(udev, ev->wd);
- if (syspath != NULL) {
- dbg(udev, "inotify event: %x for %s\n", ev->mask, syspath);
+ dev = udev_watch_lookup(udev, ev->wd);
+ if (dev != NULL) {
+ dbg(udev, "inotify event: %x for %s\n", ev->mask, udev_device_get_devnode(dev));
if (ev->mask & IN_CLOSE_WRITE) {
char filename[UTIL_PATH_SIZE];
int fd;
- info(udev, "device %s closed, synthesising 'change'\n", syspath);
- util_strlcpy(filename, syspath, sizeof(filename));
+ info(udev, "device %s closed, synthesising 'change'\n", udev_device_get_devnode(dev));
+ util_strlcpy(filename, udev_device_get_syspath(dev), sizeof(filename));
util_strlcat(filename, "/uevent", sizeof(filename));
fd = open(filename, O_WRONLY);
if (fd < 0 || write(fd, "change", 6) < 0)
close(fd);
}
if (ev->mask & IN_IGNORED)
- udev_watch_end(udev, ev->wd);
- } else {
- reload_config = 1;
+ udev_watch_end(udev, dev);
+
+ udev_device_unref(dev);
}
+
}
free (buf);
}
}
+/* create the nodes the we depend on to properly start up */
+static void setup_initial_nodes(struct udev *udev)
+{
+ struct udev_device *dev;
+
+ dev = udev_device_new_from_subsystem_sysname(udev, "mem", "null");
+ if (dev != NULL) {
+ udev_node_mknod(dev, "null", makedev(0,0), 0666, 0, 0);
+ udev_device_unref(dev);
+ }
+ dev = udev_device_new_from_subsystem_sysname(udev, "mem", "kmsg");
+ if (dev != NULL) {
+ udev_node_mknod(dev, "kmsg", makedev(0,0), 0660, 0, 0);
+ udev_device_unref(dev);
+ }
+ dev = udev_device_new_from_subsystem_sysname(udev, "tty", "console");
+ if (dev != NULL) {
+ udev_node_mknod(dev, "console", makedev(0,0), 0600, 0, 0);
+ udev_device_unref(dev);
+ }
+}
+
+static void startup_log(struct udev *udev)
+{
+ FILE *f;
+ char path[UTIL_PATH_SIZE];
+ struct stat statbuf;
+
+ f = fopen("/dev/kmsg", "w");
+ if (f != NULL)
+ fprintf(f, "<6>udev: starting version " VERSION "\n");
+
+ util_strlcpy(path, udev_get_sys_path(udev), sizeof(path));
+ util_strlcat(path, "/class/mem/null", sizeof(path));
+ if (lstat(path, &statbuf) == 0 && S_ISDIR(statbuf.st_mode)) {
+ const char *depr_str =
+ "udev: missing sysfs features; please update the kernel "
+ "or disable the kernel's CONFIG_SYSFS_DEPRECATED option; "
+ "udev may fail to work correctly";
+
+ if (f != NULL)
+ fprintf(f, "<3>%s\n", depr_str);
+ err(udev, "%s\n", depr_str);
+ sleep(3);
+ }
+
+ if (f != NULL)
+ fclose(f);
+}
+
int main(int argc, char *argv[])
{
struct udev *udev;
goto exit;
}
+ setup_initial_nodes(udev);
+
/* make sure std{in,out,err} fd's are in a sane state */
fd = open("/dev/null", O_RDWR);
if (fd < 0) {
goto exit;
}
- kernel_monitor = udev_monitor_new_from_netlink(udev);
+ kernel_monitor = udev_monitor_new_from_netlink(udev, "kernel");
if (kernel_monitor == NULL || udev_monitor_enable_receiving(kernel_monitor) < 0) {
fprintf(stderr, "error initializing netlink socket\n");
err(udev, "error initializing netlink socket\n");
close(fd);
}
- fd = open("/dev/kmsg", O_WRONLY);
- if (fd > 0) {
- const char *ver_str = "<6>udev: starting version " VERSION "\n";
- char path[UTIL_PATH_SIZE];
- struct stat statbuf;
-
- write(fd, ver_str, strlen(ver_str));
- util_strlcpy(path, udev_get_sys_path(udev), sizeof(path));
- util_strlcat(path, "/class/mem/null", sizeof(path));
- if (lstat(path, &statbuf) == 0) {
- if (S_ISDIR(statbuf.st_mode)) {
- const char *depr_str =
- "<6>udev: deprecated sysfs layout; update the kernel or "
- "disable CONFIG_SYSFS_DEPRECATED; some udev features will "
- "not work correctly\n";
-
- write(fd, depr_str, strlen(depr_str));
- }
- }
- close(fd);
- }
+ startup_log(udev);
/* set signal handlers */
memset(&act, 0x00, sizeof(struct sigaction));
if (!stop_exec_q)
event_queue_manager(udev);
}
+
+ if (settle_pid > 0) {
+ kill(settle_pid, SIGUSR1);
+ settle_pid = 0;
+ }
}
cleanup_queue_dir(udev);
rc = 0;
~ianmdlvl / elogind.git / blobdiff