*
* Userspace devfs
*
- * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
- *
+ * Copyright (C) 2003,2004 Greg Kroah-Hartman <greg@kroah.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 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.h"
+#include "udev_lib.h"
+#include "udev_sysfs.h"
#include "udev_version.h"
+#include "logging.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 = UDEV_CONFIG_DIR;
-char *udev_root = 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;
-
- action = getenv("ACTION");
- return action;
-}
-static inline char *get_devpath(void)
+#ifdef LOG
+unsigned char logname[LOGNAME_SIZE];
+void log_message(int level, const char *format, ...)
{
- char *devpath;
-
- devpath = getenv("DEVPATH");
- return devpath;
-}
+ va_list args;
-static inline char *get_seqnum(void)
-{
- char *seqnum;
+ if (!udev_log)
+ return;
- seqnum = getenv("SEQNUM");
- return seqnum;
+ va_start(args, format);
+ vsyslog(level, format, args);
+ va_end(args);
}
+#endif
-static void get_dirs(void)
+static void asmlinkage sig_handler(int signum)
{
- char *temp;
- char *udev_db = UDEV_DB;
- char *udev_config = UDEV_CONFIG_FILE;
- char *udev_permission = UDEV_CONFIG_PERMISSION_FILE;
- int retval;
-
- retval = sysfs_get_mnt_path(sysfs_path, SYSFS_PATH_MAX);
- if (retval)
- dbg("sysfs_get_mnt_path failed");
-
- /* see if we should try to override any of the default values */
- temp = getenv("UDEV_TEST");
- if (temp != NULL) {
- /* hm testing is happening, use the specified values, if they are present */
- temp = getenv("UDEV_SYSFS_PATH");
- if (temp)
- strncpy(sysfs_path, temp, sizeof(sysfs_path));
- temp = getenv("UDEV_CONFIG_DIR");
- if (temp)
- udev_config_dir = temp;
- temp = getenv("UDEV_ROOT");
- if (temp)
- udev_root = temp;
- temp = getenv("UDEV_DB");
- if (temp)
- udev_db = temp;
- temp = getenv("UDEV_CONFIG_FILE");
- if (temp)
- udev_config = temp;
- temp = getenv("UDEV_PERMISSION_FILE");
- if (temp)
- udev_permission = temp;
+ switch (signum) {
+ case SIGALRM:
+ exit(1);
+ case SIGINT:
+ case SIGTERM:
+ exit(20 + signum);
}
- dbg("sysfs_path = %s", sysfs_path);
-
- 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, udev_config, sizeof(udev_config_filename));
-
- strncpy(udev_config_permission_filename, udev_config_dir, sizeof(udev_config_permission_filename));
- strncat(udev_config_permission_filename, udev_permission, 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 sigaction act;
+ struct sysfs_class_device *class_dev;
+ struct udevice udev;
+ char path[SYSFS_PATH_MAX];
int retval = -EINVAL;
-
- main_argv = argv;
- main_envp = envp;
+ enum {
+ ADD,
+ REMOVE,
+ UDEVSTART,
+ } act_type;
dbg("version %s", UDEV_VERSION);
+ logging_init("udev");
+ udev_init_config();
+
+ if (strstr(argv[0], "udevstart") || (argv[1] != NULL && strstr(argv[1], "udevstart"))) {
+ act_type = UDEVSTART;
+ } else {
+ const char *action = getenv("ACTION");
+ const char *devpath = getenv("DEVPATH");
+ const char *subsystem = argv[1];
+
+ if (!action) {
+ dbg("no action?");
+ goto exit;
+ }
+ if (strcmp(action, "add") == 0) {
+ act_type = ADD;
+ } else if (strcmp(action, "remove") == 0) {
+ act_type = REMOVE;
+ } else {
+ dbg("no action '%s' for us", action);
+ goto exit;
+ }
+
+ if (!devpath) {
+ dbg("no devpath?");
+ goto exit;
+ }
+ dbg("looking at '%s'", devpath);
+
+ /* 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;
+ }
+
+ if (!subsystem) {
+ dbg("no subsystem");
+ goto exit;
+ }
+
+ udev_set_values(&udev, devpath, subsystem, action);
+
+ /* skip blacklisted subsystems */
+ if (udev.type != 'n' && subsystem_expect_no_dev(subsystem)) {
+ dbg("don't care about '%s' devices", subsystem);
+ goto exit;
+ };
- if (argc != 2) {
- dbg ("unknown number of arguments");
- goto exit;
}
- subsystem = argv[1];
-
- devpath = get_devpath();
- if (!devpath) {
- dbg ("no devpath?");
- goto exit;
- }
- dbg("looking at %s", devpath);
-
- /* we only care about class devices and block stuff */
- if (!strstr(devpath, "class") &&
- !strstr(devpath, "block")) {
- dbg("not block or class");
- 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;
- }
-
- action = get_action();
- if (!action) {
- dbg ("no action?");
- goto exit;
+ /* set signal handlers */
+ 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 timout to interrupt blocking syscalls */
+ alarm(ALARM_TIMEOUT);
+
+ switch(act_type) {
+ case UDEVSTART:
+ dbg("udevstart");
+ namedev_init();
+ retval = udev_start();
+ break;
+ case ADD:
+ dbg("udev add");
+
+ /* open the device */
+ snprintf(path, SYSFS_PATH_MAX, "%s%s", sysfs_path, udev.devpath);
+ class_dev = sysfs_open_class_device_path(path);
+ if (class_dev == NULL) {
+ dbg ("sysfs_open_class_device_path failed");
+ break;
+ }
+ dbg("opened class_dev->name='%s'", class_dev->name);
+
+ /* init rules */
+ namedev_init();
+
+ /* name, create node, store in db */
+ retval = udev_add_device(&udev, class_dev);
+
+ /* run scripts */
+ dev_d_execute(&udev);
+
+ sysfs_close_class_device(class_dev);
+ break;
+ case REMOVE:
+ dbg("udev remove");
+
+ /* get node from db, delete it*/
+ retval = udev_remove_device(&udev);
+
+ /* run scripts */
+ dev_d_execute(&udev);
}
- /* initialize udev database */
- get_dirs();
- retval = udevdb_init(UDEVDB_DEFAULT);
- if (retval != 0) {
- dbg("Unable to initialize database.");
- goto exit;
- }
-
- /* initialize the naming deamon */
- namedev_init();
-
- 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;
- }
- udevdb_exit();
-
-exit:
+exit:
+ logging_close();
return retval;
}
-
~ianmdlvl / elogind.git / blobdiff