/*
* udev.c
*
- * Userspace devfs
- *
- * Copyright (C) 2003,2004 Greg Kroah-Hartman <greg@kroah.com>
- * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
+ * Copyright (C) 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
+ * Copyright (C) 2004-2005 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
#include <errno.h>
#include <signal.h>
#include <unistd.h>
+#include <syslog.h>
-#include "libsysfs/sysfs/libsysfs.h"
#include "udev.h"
-#include "udev_utils.h"
-#include "udev_sysfs.h"
-#include "udev_version.h"
-#include "namedev.h"
-#include "logging.h"
-
+#include "udev_rules.h"
-#ifdef LOG
-unsigned char logname[LOGNAME_SIZE];
-void log_message(int level, const char *format, ...)
+#ifdef USE_LOG
+void log_message(int priority, const char *format, ...)
{
va_list args;
- if (!udev_log)
+ if (priority > udev_log_priority)
return;
va_start(args, format);
- vsyslog(level, format, args);
+ vsyslog(priority, format, args);
va_end(args);
}
#endif
-/* (for now) true if udevsend is the helper */
-static int manage_hotplug_event(void) {
- char helper[256];
- int fd;
- int len;
-
- fd = open("/proc/sys/kernel/hotplug", O_RDONLY);
- if (fd < 0)
- goto exit;
-
- len = read(fd, helper, 256);
- close(fd);
-
- if (len < 0)
- goto exit;
- helper[len] = '\0';
-
- if (strstr(helper, "udevsend"))
- return 1;
-
-exit:
- return 0;
-}
-
static void asmlinkage sig_handler(int signum)
{
switch (signum) {
int main(int argc, char *argv[], char *envp[])
{
+ struct sysfs_device *dev;
+ struct udevice *udev;
+ const char *maj, *min;
+ struct udev_rules rules;
+ const char *action;
+ const char *devpath;
+ const char *subsystem;
struct sigaction act;
- struct sysfs_class_device *class_dev;
- struct sysfs_device *devices_dev;
- struct udevice udev;
- char path[SYSFS_PATH_MAX];
+ int devnull;
int retval = -EINVAL;
- const char *error;
- const char *action = getenv("ACTION");
- const char *devpath = getenv("DEVPATH");
- const char *subsystem = argv[1];
- dbg("version %s", UDEV_VERSION);
+ if (argc == 2 && strcmp(argv[1], "-V") == 0) {
+ printf("%s\n", UDEV_VERSION);
+ exit(0);
+ }
+
+ /* set std fd's to /dev/null, if the kernel forks us, we don't have them at all */
+ devnull = open("/dev/null", O_RDWR);
+ if (devnull >= 0) {
+ if (devnull != STDIN_FILENO)
+ dup2(devnull, STDIN_FILENO);
+ if (devnull != STDOUT_FILENO)
+ dup2(devnull, STDOUT_FILENO);
+ if (devnull != STDERR_FILENO)
+ dup2(devnull, STDERR_FILENO);
+ if (devnull > STDERR_FILENO)
+ close(devnull);
+ }
+
logging_init("udev");
- udev_init_config();
+ if (devnull < 0)
+ err("fatal, could not open /dev/null: %s", strerror(errno));
+ udev_config_init();
+ dbg("version %s", UDEV_VERSION);
/* set signal handlers */
memset(&act, 0x00, sizeof(act));
- act.sa_handler = (void (*) (int))sig_handler;
+ act.sa_handler = (void (*)(int)) sig_handler;
sigemptyset (&act.sa_mask);
act.sa_flags = 0;
- /* alarm must not restart syscalls*/
sigaction(SIGALRM, &act, NULL);
sigaction(SIGINT, &act, NULL);
sigaction(SIGTERM, &act, NULL);
- /* trigger timeout to interrupt blocking syscalls */
- alarm(ALARM_TIMEOUT);
-
- udev_set_values(&udev, devpath, subsystem, action);
+ /* trigger timeout to prevent hanging processes */
+ alarm(UDEV_ALARM_TIMEOUT);
- if (strstr(argv[0], "udevstart") || (argv[1] != NULL && strstr(argv[1], "udevstart"))) {
- dbg("udevstart");
+ action = getenv("ACTION");
+ devpath = getenv("DEVPATH");
+ subsystem = getenv("SUBSYSTEM");
+ /* older kernels passed the SUBSYSTEM only as argument */
+ if (subsystem == NULL && argc == 2)
+ subsystem = argv[1];
- /* disable all logging, as it's much too slow on some facilities */
- udev_log = 0;
-
- namedev_init();
- retval = udev_start();
+ if (action == NULL || subsystem == NULL || devpath == NULL) {
+ err("action, subsystem or devpath missing");
goto exit;
}
- if (!action) {
- dbg("no action");
- goto hotplug;
- }
+ /* export log_priority , as called programs may want to do the same as udev */
+ if (udev_log_priority) {
+ char priority[32];
- if (!subsystem) {
- dbg("no subsystem");
- goto hotplug;
+ sprintf(priority, "%i", udev_log_priority);
+ setenv("UDEV_LOG", priority, 1);
}
- if (!devpath) {
- dbg("no devpath");
- goto hotplug;
- }
-
- /* export logging flag, as called scripts may want to do the same as udev */
- if (udev_log)
- setenv("UDEV_LOG", "1", 1);
-
- if ((strncmp(devpath, "/block/", 7) == 0) || (strncmp(devpath, "/class/", 7) == 0)) {
- if (strcmp(action, "add") == 0) {
- /* wait for sysfs and possibly add node */
- dbg("udev add");
-
- /* skip blacklisted subsystems */
- if (udev.type != 'n' && subsystem_expect_no_dev(udev.subsystem)) {
- dbg("don't care about '%s' devices", udev.subsystem);
- goto hotplug;
- };
-
- snprintf(path, SYSFS_PATH_MAX, "%s%s", sysfs_path, udev.devpath);
- class_dev = wait_class_device_open(path);
- if (class_dev == NULL) {
- dbg ("open class device failed");
- goto hotplug;
- }
- dbg("opened class_dev->name='%s'", class_dev->name);
-
- wait_for_class_device(class_dev, &error);
-
- /* init rules, permissions */
- namedev_init();
-
- /* name, create node, store in db */
- retval = udev_add_device(&udev, class_dev);
-
- /* run dev.d/ scripts if we created a node or changed a netif name */
- if (udev_dev_d && udev.devname[0] != '\0') {
- setenv("DEVNAME", udev.devname, 1);
- udev_multiplex_directory(&udev, DEVD_DIR, DEVD_SUFFIX);
- }
-
- sysfs_close_class_device(class_dev);
- } else if (strcmp(action, "remove") == 0) {
- /* possibly remove a node */
- dbg("udev remove");
-
- /* get node from db, remove db-entry, delete created node */
- retval = udev_remove_device(&udev);
+ sysfs_init();
+ udev_rules_init(&rules, 0);
- /* Set the DEVNAME if known */
- if (udev.devname[0] != '\0') {
- setenv("DEVNAME", udev.devname, 1);
- }
- /* run dev.d/ scripts if we're not instructed to ignore the event */
- if (udev_dev_d && udev.devname[0] != '\0') {
- setenv("DEVNAME", udev.devname, 1);
- udev_multiplex_directory(&udev, DEVD_DIR, DEVD_SUFFIX);
- }
+ dev = sysfs_device_get(devpath);
+ if (dev == NULL) {
+ info("unable to open '%s'", devpath);
+ goto fail;
+ }
- }
- } else if ((strncmp(devpath, "/devices/", 9) == 0)) {
- if (strcmp(action, "add") == 0) {
- /* wait for sysfs */
- dbg("devices add");
-
- snprintf(path, SYSFS_PATH_MAX, "%s%s", sysfs_path, devpath);
- devices_dev = wait_devices_device_open(path);
- if (!devices_dev) {
- dbg("devices device unavailable (probably remove has beaten us)");
- goto hotplug;
+ udev = udev_device_init();
+ if (udev == NULL)
+ goto fail;
+
+ /* override built-in sysfs device */
+ udev->dev = dev;
+ strlcpy(udev->action, action, sizeof(udev->action));
+
+ /* get dev_t from environment, which is needed for "remove" to work, "add" works also from sysfs */
+ maj = getenv("MAJOR");
+ min = getenv("MINOR");
+ if (maj != NULL && min != NULL)
+ udev->devt = makedev(atoi(maj), atoi(min));
+ else
+ udev->devt = udev_device_get_devt(udev);
+
+ retval = udev_device_event(&rules, udev);
+
+ if (!retval && udev_run && !list_empty(&udev->run_list)) {
+ struct name_entry *name_loop;
+
+ dbg("executing run list");
+ list_for_each_entry(name_loop, &udev->run_list, node) {
+ if (strncmp(name_loop->name, "socket:", strlen("socket:")) == 0)
+ pass_env_to_socket(&name_loop->name[strlen("socket:")], devpath, action);
+ else {
+ char program[PATH_SIZE];
+
+ strlcpy(program, name_loop->name, sizeof(program));
+ apply_format(udev, program, sizeof(program));
+ run_program(program, udev->dev->subsystem, NULL, 0, NULL, (udev_log_priority >= LOG_INFO));
}
- dbg("devices device opened '%s'", path);
-
- wait_for_devices_device(devices_dev, &error);
-
- sysfs_close_device(devices_dev);
- } else if (strcmp(action, "remove") == 0) {
- dbg("devices remove");
}
- } else {
- dbg("unhandled");
}
-hotplug:
- if (manage_hotplug_event())
- udev_multiplex_directory(&udev, HOTPLUGD_DIR, HOTPLUG_SUFFIX);
+ udev_device_cleanup(udev);
+fail:
+ udev_rules_cleanup(&rules);
+ sysfs_cleanup();
exit:
logging_close();
~ianmdlvl / elogind.git / blobdiff