*
* Userspace devfs
*
- * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
- *
+ * 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 <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_rules.h"
+#include "logging.h"
-
-static char *get_action(void)
+#ifdef USE_LOG
+void log_message(int priority, const char *format, ...)
{
- char *action;
+ va_list args;
- action = getenv("ACTION");
- return action;
-}
+ if (priority > udev_log_priority)
+ return;
+ va_start(args, format);
+ vsyslog(priority, format, args);
+ va_end(args);
+}
+#endif
-/* yeah this should be dynamically allocated... */
-static char device[255];
+static void asmlinkage sig_handler(int signum)
+{
+ switch (signum) {
+ case SIGALRM:
+ exit(1);
+ case SIGINT:
+ case SIGTERM:
+ exit(20 + signum);
+ }
+}
-static char *get_device(void)
+int main(int argc, char *argv[], char *envp[])
{
- char *temp;
+ struct udevice udev;
+ struct udev_rules rules;
+ char path[PATH_SIZE];
+ const char *error;
+ const char *action;
+ const char *devpath;
+ const char *subsystem;
+ struct sigaction act;
+ int retval = -EINVAL;
+
+ if (argc == 2 && strcmp(argv[1], "-V") == 0) {
+ printf("%s\n", UDEV_VERSION);
+ exit(0);
+ }
- temp = getenv("DEVPATH");
- if (temp == NULL)
- return NULL;
- strcpy(device, SYSFS_ROOT);
- strcat(device, temp);
+ logging_init("udev");
+ udev_init_config();
+ dbg("version %s", UDEV_VERSION);
- return device;
-}
+ /* 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);
+ /* trigger timeout to prevent hanging processes */
+ alarm(UDEV_ALARM_TIMEOUT);
-int main(int argc, char *argv[])
-{
- char *subsystem;
- char *action;
- char *dev;
-
- if (argc != 2) {
- dbg ("unknown number of arguments");
- return 1;
+ action = getenv("ACTION");
+ devpath = getenv("DEVPATH");
+ subsystem = getenv("SUBSYSTEM");
+ /* older kernels passed the SUBSYSTEM only as argument */
+ if (!subsystem && argc == 2)
+ subsystem = argv[1];
+
+ if (!action || !subsystem || !devpath) {
+ err("action, subsystem or devpath missing");
+ goto exit;
}
- subsystem = argv[1];
+ /* export log_priority , as called programs may want to do the same as udev */
+ if (udev_log_priority) {
+ char priority[32];
- action = get_action();
- if (!action) {
- dbg ("no action?");
- return 1;
+ sprintf(priority, "%i", udev_log_priority);
+ setenv("UDEV_LOG", priority, 1);
}
- dev = get_device();
- if (!dev) {
- dbg ("no device?");
- return 1;
+ udev_init_device(&udev, devpath, subsystem, action);
+ udev_rules_init(&rules, 0);
+
+ 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(&rules, &udev, class_dev);
+ if (udev.ignore_device) {
+ info("device event will be ignored");
+ sysfs_close_class_device(class_dev);
+ goto cleanup;
+ }
+ if (udev.name[0] == '\0') {
+ info("device node creation supressed");
+ sysfs_close_class_device(class_dev);
+ goto cleanup;
+ }
+ /* create node, store in db */
+ retval = udev_add_device(&udev, class_dev);
+ } else {
+ dbg("no dev-file found");
+ udev_rules_get_run(&rules, &udev, class_dev, NULL);
+ if (udev.ignore_device) {
+ info("device event will be ignored");
+ sysfs_close_class_device(class_dev);
+ goto cleanup;
+ }
+ }
+ sysfs_close_class_device(class_dev);
+ } else if (strcmp(action, "remove") == 0) {
+ dbg("node remove");
+ udev_rules_get_run(&rules, &udev, NULL, 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);
+ }
+
+ /* 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(&rules, &udev, NULL, 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(&rules, &udev, NULL, NULL);
+ if (udev.ignore_device) {
+ info("device event will be ignored");
+ goto cleanup;
+ }
}
- return 0;
-}
+run:
+ if (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)
+ execute_program(name_loop->name, udev.subsystem, NULL, 0, NULL);
+ }
+
+cleanup:
+ udev_cleanup_device(&udev);
+
+exit:
+ logging_close();
+ return retval;
+}
~ianmdlvl / elogind.git / blobdiff