*
* 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 <stdio.h>
#include <fcntl.h>
-#include <unistd.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 "namedev.h"
-#include "udevdb.h"
-#include "libsysfs/libsysfs.h"
-
-/* global variables */
-char **main_argv;
-char **main_envp;
-
-char sysfs_path[SYSFS_PATH_MAX];
-char *udev_config_dir;
-char *udev_root;
-char udev_db_filename[PATH_MAX+NAME_MAX];
-char udev_config_permission_filename[PATH_MAX+NAME_MAX];
-char udev_config_filename[PATH_MAX+NAME_MAX];
-
-
-static inline char *get_action(void)
-{
- char *action;
+#include "udev_rules.h"
+#include "logging.h"
- action = getenv("ACTION");
- return action;
-}
-
-static inline char *get_devpath(void)
+#ifdef USE_LOG
+void log_message(int priority, const char *format, ...)
{
- char *devpath;
+ va_list args;
- devpath = getenv("DEVPATH");
- return devpath;
-}
-
-static inline char *get_seqnum(void)
-{
- char *seqnum;
+ if (priority > udev_log_priority)
+ return;
- seqnum = getenv("SEQNUM");
- return seqnum;
+ va_start(args, format);
+ vsyslog(priority, format, args);
+ va_end(args);
}
+#endif
-static void get_dirs(void)
+static void asmlinkage sig_handler(int signum)
{
- char *udev_test;
- char *temp;
- int retval;
-
- udev_test = getenv("UDEV_TEST");
- if (udev_test == NULL) {
- /* normal operation, use the compiled in defaults */
- udev_config_dir = UDEV_CONFIG_DIR;
- udev_root = UDEV_ROOT;
- retval = sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX);
- dbg("sysfs_path = %s", sysfs_path);
- if (retval)
- dbg("sysfs_get_mnt_path failed");
-
- } else {
- /* hm testing is happening, use the specified values */
- temp = getenv("UDEV_SYSFS_PATH");
- strncpy(sysfs_path, temp, sizeof(sysfs_path));
- udev_config_dir = getenv("UDEV_CONFIG_DIR");
- udev_root = getenv("UDEV_ROOT");
+ switch (signum) {
+ case SIGALRM:
+ exit(1);
+ case SIGINT:
+ case SIGTERM:
+ exit(20 + signum);
}
-
- strncpy(udev_db_filename, udev_config_dir, sizeof(udev_db_filename));
- strncat(udev_db_filename, UDEV_DB, sizeof(udev_db_filename));
-
- strncpy(udev_config_filename, udev_config_dir, sizeof(udev_config_filename));
- strncat(udev_config_filename, NAMEDEV_CONFIG_FILE, sizeof(udev_config_filename));
-
- strncpy(udev_config_permission_filename, udev_config_dir, sizeof(udev_config_permission_filename));
- strncat(udev_config_permission_filename, NAMEDEV_CONFIG_PERMISSION_FILE, sizeof(udev_config_permission_filename));
}
-int main(int argc, char **argv, char **envp)
+int main(int argc, char *argv[], char *envp[])
{
- char *action;
- char *devpath;
- char *subsystem;
+ 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;
-
- main_argv = argv;
- main_envp = envp;
+ if (argc == 2 && strcmp(argv[1], "-V") == 0) {
+ printf("%s\n", UDEV_VERSION);
+ exit(0);
+ }
+
+ logging_init("udev");
+ udev_init_config();
dbg("version %s", UDEV_VERSION);
- if (argc != 2) {
- dbg ("unknown number of arguments");
- goto exit;
- }
+ /* 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);
- subsystem = argv[1];
+ /* trigger timeout to prevent hanging processes */
+ alarm(ALARM_TIMEOUT);
- devpath = get_devpath();
- if (!devpath) {
- dbg ("no devpath?");
- goto exit;
- }
- dbg("looking at %s", devpath);
+ action = getenv("ACTION");
+ devpath = getenv("DEVPATH");
+ subsystem = getenv("SUBSYSTEM");
+ /* older kernels passed the SUBSYSTEM only as argument */
+ if (!subsystem && argc == 2)
+ subsystem = argv[1];
- /* we only care about class devices and block stuff */
- if (!strstr(devpath, "class") &&
- !strstr(devpath, "block")) {
- dbg("not block or class");
+ if (!action || !subsystem || !devpath) {
+ err("action, subsystem or devpath missing");
goto exit;
}
- /* but we don't care about net class devices */
- if (strcmp(subsystem, "net") == 0) {
- dbg("don't care about net devices");
- goto exit;
- }
+ /* export log_level , 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?");
- goto exit;
+ sprintf(priority, "%i", udev_log_priority);
+ setenv("UDEV_LOG", priority, 1);
}
- /* initialize udev database */
- get_dirs();
- retval = udevdb_init(UDEVDB_DEFAULT);
- if (retval != 0) {
- dbg("Unable to initialize database.");
- 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);
+ }
+
+ /* export name of device node or netif */
+ if (udev.devname[0] != '\0')
+ setenv("DEVNAME", udev.devname, 1);
+ } else if (udev.type == DEV_DEVICE) {
+ if (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 if (strcmp(action, "remove") == 0) {
+ dbg("devices remove");
+ udev_rules_get_run(&udev, NULL);
+ if (udev.ignore_device) {
+ info("device event will be ignored");
+ goto cleanup;
+ }
+ }
}
- /* 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_command(name_loop->name, udev.subsystem);
}
- udevdb_exit();
-exit:
+cleanup:
+ udev_cleanup_device(&udev);
+
+exit:
+ logging_close();
return retval;
}
-