*
* 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 "libsysfs/libsysfs.h"
+#include "udevdb.h"
+/* timeout flag for udevdb */
+extern sig_atomic_t gotalarm;
-static char *get_action(void)
+/* global variables */
+char **main_argv;
+char **main_envp;
+
+#ifdef LOG
+unsigned char logname[LOGNAME_SIZE];
+void log_message(int level, const char *format, ...)
{
- char *action;
+ va_list args;
- action = getenv("ACTION");
- return action;
-}
+ if (!udev_log)
+ return;
+ va_start(args, format);
+ vsyslog(level, format, args);
+ va_end(args);
+}
+#endif
-static char *get_device(void)
+static void asmlinkage sig_handler(int signum)
{
- char *device;
-
- device = getenv("DEVPATH");
- return device;
+ switch (signum) {
+ case SIGALRM:
+ gotalarm = 1;
+ info("error: timeout reached, event probably not handled correctly");
+ break;
+ case SIGINT:
+ case SIGTERM:
+ udevdb_exit();
+ exit(20 + signum);
+ default:
+ dbg("unhandled signal %d", signum);
+ }
}
-int main(int argc, char *argv[])
+int main(int argc, char *argv[], char *envp[])
{
- char *action;
- char *device;
- char *subsystem;
+ struct sigaction act;
+ struct sysfs_class_device *class_dev;
+ struct udevice udev;
+ char path[SYSFS_PATH_MAX];
int retval = -EINVAL;
-
- if (argc != 2) {
- dbg ("unknown number of arguments");
- goto exit;
- }
-
- subsystem = argv[1];
-
- device = get_device();
- if (!device) {
- dbg ("no device?");
- goto exit;
- }
- dbg("looking at %s", device);
-
- /* we only care about class devices and block stuff */
- if (!strstr(device, "class") &&
- !strstr(device, "block")) {
- dbg("not block or class");
- goto exit;
- }
+ enum {
+ ADD,
+ REMOVE,
+ UDEVSTART,
+ } act_type;
+
+ dbg("version %s", UDEV_VERSION);
+
+ main_argv = argv;
+ main_envp = envp;
+
+ logging_init("udev");
+
+ udev_init_config();
+
+ if (strstr(argv[0], "udevstart")) {
+ act_type = UDEVSTART;
+ } else {
+ const char *action = get_action();
+ const char *devpath = get_devpath();
+ const char *subsystem = get_subsystem(main_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);
+
+ /* skip blacklisted subsystems */
+ if (udev.type != 'n' && subsystem_expect_no_dev(subsystem)) {
+ dbg("don't care about '%s' devices", subsystem);
+ 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);
+ /* 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);
+
+ /* initialize udev database */
+ if (udevdb_init(UDEVDB_DEFAULT) != 0)
+ info("error: unable to initialize database, continuing without database");
+
+ 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 the naming deamon */
- namedev_init();
-
- if (strcmp(action, "add") == 0)
- return udev_add_device(device, argv[1]);
-
- if (strcmp(action, "remove") == 0)
- return udev_remove_device(device, argv[1]);
+ udevdb_exit();
- dbg("Unknown action: %s", action);
- retval = -EINVAL;
-
-exit:
+exit:
+ logging_close();
return retval;
}
-
~ianmdlvl / elogind.git / blobdiff