* Userspace devfs
*
* Copyright (C) 2003,2004 Greg Kroah-Hartman <greg@kroah.com>
+ * Copyright (C) 2004 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 <stdio.h>
+#include <stddef.h>
#include <stdlib.h>
#include <string.h>
-#include <stdio.h>
-#include <errno.h>
+#include <fcntl.h>
#include <ctype.h>
+#include <errno.h>
#include <signal.h>
+#include <unistd.h>
+#include "libsysfs/sysfs/libsysfs.h"
+#include "udev_libc_wrapper.h"
#include "udev.h"
+#include "udev_utils.h"
+#include "udev_sysfs.h"
#include "udev_version.h"
-#include "udev_dbus.h"
+#include "udev_rules.h"
#include "logging.h"
-#include "namedev.h"
-#include "udevdb.h"
-#include "libsysfs/libsysfs.h"
-
-/* global variables */
-char **main_argv;
-char **main_envp;
-unsigned char logname[42];
-int log_ok(void)
+#ifdef USE_LOG
+void log_message(int priority, const char *format, ...)
{
- return udev_log;
+ va_list args;
+
+ if (priority > udev_log_priority)
+ return;
+
+ va_start(args, format);
+ vsyslog(priority, format, args);
+ va_end(args);
}
+#endif
-static void sig_handler(int signum)
+static void asmlinkage sig_handler(int signum)
{
- dbg("caught signal %d", signum);
switch (signum) {
+ case SIGALRM:
+ exit(1);
case SIGINT:
case SIGTERM:
- sysbus_disconnect();
- udevdb_exit();
exit(20 + signum);
- break;
- default:
- dbg("unhandled signal");
}
}
-static inline char *get_action(void)
-{
- char *action;
-
- action = getenv("ACTION");
- return action;
-}
-
-static inline char *get_devpath(void)
+int main(int argc, char *argv[], char *envp[])
{
- char *devpath;
+ struct udevice udev;
+ char path[PATH_SIZE];
+ const char *error;
+ const char *action;
+ const char *devpath;
+ const char *subsystem;
+ struct sigaction act;
+ int retval = -EINVAL;
- devpath = getenv("DEVPATH");
- return devpath;
-}
+ if (argc == 2 && strcmp(argv[1], "-V") == 0) {
+ printf("%s\n", UDEV_VERSION);
+ exit(0);
+ }
-static inline char *get_seqnum(void)
-{
- char *seqnum;
+ logging_init("udev");
+ udev_init_config();
+ dbg("version %s", UDEV_VERSION);
- seqnum = getenv("SEQNUM");
- return seqnum;
-}
+ /* set signal handlers */
+ memset(&act, 0x00, sizeof(act));
+ act.sa_handler = (void (*)(int)) sig_handler;
+ sigemptyset (&act.sa_mask);
+ act.sa_flags = 0;
+ sigaction(SIGALRM, &act, NULL);
+ sigaction(SIGINT, &act, NULL);
+ sigaction(SIGTERM, &act, NULL);
-static char *subsystem_blacklist[] = {
- "net",
- "scsi_host",
- "scsi_device",
- "usb_host",
- "pci_bus",
- "",
-};
+ /* trigger timeout to prevent hanging processes */
+ alarm(ALARM_TIMEOUT);
-static int udev_hotplug(int argc, char **argv)
-{
- char *action;
- char *devpath;
- char *subsystem;
- int retval = -EINVAL;
- int i;
+ action = getenv("ACTION");
+ devpath = getenv("DEVPATH");
+ subsystem = getenv("SUBSYSTEM");
+ /* older kernels passed the SUBSYSTEM only as argument */
+ if (!subsystem && argc == 2)
+ subsystem = argv[1];
- action = get_action();
- if (!action) {
- dbg ("no action?");
+ if (!action || !subsystem || !devpath) {
+ err("action, subsystem or devpath missing");
goto exit;
}
- devpath = get_devpath();
- if (!devpath) {
- dbg ("no devpath?");
- goto exit;
- }
- dbg("looking at '%s'", devpath);
+ /* export log_priority , as called programs may want to do the same as udev */
+ if (udev_log_priority) {
+ char priority[32];
- /* we only care about class devices and block stuff */
- if (!strstr(devpath, "class") &&
- !strstr(devpath, "block")) {
- dbg("not a block or class device");
- goto exit;
+ sprintf(priority, "%i", udev_log_priority);
+ setenv("UDEV_LOG", priority, 1);
}
- /* skip blacklisted subsystems */
- subsystem = argv[1];
- i = 0;
- while (subsystem_blacklist[i][0] != '\0') {
- if (strcmp(subsystem, subsystem_blacklist[i]) == 0) {
- dbg("don't care about '%s' devices", subsystem);
- goto exit;
+ udev_init_device(&udev, devpath, subsystem, action);
+ udev_rules_init();
+
+ if (udev.type == DEV_BLOCK || udev.type == DEV_CLASS || udev.type == DEV_NET) {
+ /* handle device node */
+ if (strcmp(action, "add") == 0) {
+ struct sysfs_class_device *class_dev;
+
+ /* wait for sysfs of /sys/class /sys/block */
+ dbg("node add");
+ snprintf(path, sizeof(path), "%s%s", sysfs_path, udev.devpath);
+ path[sizeof(path)-1] = '\0';
+ class_dev = wait_class_device_open(path);
+ if (class_dev == NULL) {
+ dbg("open class device failed");
+ goto run;
+ }
+ dbg("opened class_dev->name='%s'", class_dev->name);
+ wait_for_class_device(class_dev, &error);
+
+ /* get major/minor */
+ if (udev.type == DEV_BLOCK || udev.type == DEV_CLASS)
+ udev.devt = get_devt(class_dev);
+
+ if (udev.type == DEV_NET || udev.devt) {
+ /* name device */
+ udev_rules_get_name(&udev, class_dev);
+ if (udev.ignore_device) {
+ info("device event will be ignored");
+ goto cleanup;
+ }
+ if (udev.name[0] == '\0') {
+ info("device node creation supressed");
+ goto cleanup;
+ }
+
+ /* create node, store in db */
+ retval = udev_add_device(&udev, class_dev);
+ } else {
+ dbg("no dev-file found");
+ udev_rules_get_run(&udev, NULL);
+ if (udev.ignore_device) {
+ info("device event will be ignored");
+ goto cleanup;
+ }
+ }
+ sysfs_close_class_device(class_dev);
+ } else if (strcmp(action, "remove") == 0) {
+ dbg("node remove");
+ udev_rules_get_run(&udev, NULL);
+ if (udev.ignore_device) {
+ dbg("device event will be ignored");
+ goto cleanup;
+ }
+
+ /* get name from db, remove db-entry, delete node */
+ retval = udev_remove_device(&udev);
}
- i++;
- }
-
- /* connect to the system message bus */
- sysbus_connect();
- /* initialize our configuration */
- udev_init_config();
-
- /* initialize udev database */
- retval = udevdb_init(UDEVDB_DEFAULT);
- if (retval != 0) {
- dbg("unable to initialize database");
- goto exit_sysbus;
+ /* export name of device node or netif */
+ if (udev.devname[0] != '\0')
+ setenv("DEVNAME", udev.devname, 1);
+ } else if (udev.type == DEV_DEVICE && strcmp(action, "add") == 0) {
+ struct sysfs_device *devices_dev;
+
+ /* wait for sysfs of /sys/devices/ */
+ dbg("devices add");
+ snprintf(path, sizeof(path), "%s%s", sysfs_path, devpath);
+ path[sizeof(path)-1] = '\0';
+ devices_dev = wait_devices_device_open(path);
+ if (!devices_dev) {
+ dbg("devices device unavailable (probably remove has beaten us)");
+ goto run;
+ }
+ dbg("devices device opened '%s'", path);
+ wait_for_devices_device(devices_dev, &error);
+ udev_rules_get_run(&udev, devices_dev);
+ sysfs_close_device(devices_dev);
+ if (udev.ignore_device) {
+ info("device event will be ignored");
+ goto cleanup;
+ }
+ } else {
+ dbg("default handling");
+ udev_rules_get_run(&udev, NULL);
+ if (udev.ignore_device) {
+ info("device event will be ignored");
+ goto cleanup;
+ }
}
- /* set up a default signal handler for now */
- signal(SIGINT, sig_handler);
- signal(SIGTERM, sig_handler);
-
- /* initialize the naming deamon */
- namedev_init();
+run:
+ if (udev_run && !list_empty(&udev.run_list)) {
+ struct name_entry *name_loop;
- if (strcmp(action, "add") == 0)
- retval = udev_add_device(devpath, subsystem);
-
- else if (strcmp(action, "remove") == 0)
- retval = udev_remove_device(devpath, subsystem);
-
- else {
- dbg("unknown action '%s'", action);
- retval = -EINVAL;
+ dbg("executing run list");
+ list_for_each_entry(name_loop, &udev.run_list, node)
+ execute_program(name_loop->name, udev.subsystem, NULL, 0, NULL);
}
- udevdb_exit();
-exit_sysbus:
- /* disconnect from the system message bus */
- sysbus_disconnect();
+cleanup:
+ udev_cleanup_device(&udev);
exit:
- if (retval > 0)
- retval = 0;
-
- return -retval;
+ logging_close();
+ return retval;
}
-
-int main(int argc, char **argv, char **envp)
-{
- main_argv = argv;
- main_envp = envp;
-
- init_logging("udev");
- dbg("version %s", UDEV_VERSION);
-
- return udev_hotplug(argc, argv);
-}
-
-
~ianmdlvl / elogind.git / blobdiff