*
* 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
*
*/
+#define _KLIBC_HAS_ARCH_SIG_ATOMIC_T
+#include <stdio.h>
+#include <stddef.h>
#include <stdlib.h>
#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+#include <signal.h>
+
+#include "libsysfs/sysfs/libsysfs.h"
#include "udev.h"
+#include "udev_lib.h"
#include "udev_version.h"
+#include "logging.h"
+#include "namedev.h"
+#include "udevdb.h"
+/* timeout flag for udevdb */
+extern sig_atomic_t gotalarm;
-static char *get_action(void)
-{
- char *action;
+/* global variables */
+char **main_argv;
+char **main_envp;
- action = getenv("ACTION");
- return action;
-}
+#ifdef LOG
+unsigned char logname[LOGNAME_SIZE];
+void log_message(int level, const char *format, ...)
+{
+ va_list args;
+ if (!udev_log)
+ return;
-/* yeah this should be dynamically allocated... */
-static char device[255];
+ 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 *temp;
+ 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);
+ }
+}
- temp = getenv("DEVPATH");
- if (temp == NULL)
- return NULL;
- strcpy(device, SYSFS_ROOT);
- strcat(device, temp);
+/* list of subsystems we don't care about. not listing such systems here
+ * is not critical, but it makes it faster as we don't look for the "dev" file
+ */
+static int subsystem_without_dev(const char *subsystem)
+{
+ char *subsystem_blacklist[] = {
+ "scsi_host",
+ "scsi_device",
+ "usb_host",
+ "pci_bus",
+ "pcmcia_socket",
+ "bluetooth",
+ "i2c-adapter",
+ "pci_bus",
+ "ieee1394",
+ "ieee1394_host",
+ "ieee1394_node",
+ NULL
+ };
+ char **subsys;
+
+ for (subsys = subsystem_blacklist; *subsys != NULL; subsys++) {
+ if (strcmp(subsystem, *subsys) == 0)
+ return 1;
+ }
- return device;
+ return 0;
}
-
-int main(int argc, char *argv[])
+int main(int argc, char *argv[], char *envp[])
{
- char *subsystem;
+ struct sigaction act;
char *action;
- char *dev;
-
- if (argc != 2) {
- dbg ("unknown number of arguments");
- return 1;
+ char *devpath = "";
+ char *subsystem = "";
+ int retval = -EINVAL;
+ 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 {
+ action = get_action();
+ 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("unknown action '%s'", action);
+ goto exit;
+ }
+
+ 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 a block or class device");
+ goto exit;
+ }
+
+ subsystem = get_subsystem(main_argv[1]);
+ if (!subsystem) {
+ dbg("no subsystem?");
+ goto exit;
+ }
+
+ /* skip blacklisted subsystems */
+ if (subsystem_without_dev(subsystem)) {
+ dbg("don't care about '%s' devices", subsystem);
+ exit(0);
+ };
}
- subsystem = argv[1];
-
- action = get_action();
- if (!action) {
- dbg ("no action?");
- return 1;
+ /* 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");
+ namedev_init();
+ retval = udev_add_device(devpath, subsystem, NOFAKE);
+ break;
+ case REMOVE:
+ dbg("udev remove");
+ retval = udev_remove_device(devpath, subsystem);
}
- dev = get_device();
- if (!dev) {
- dbg ("no device?");
- return 1;
- }
+ udevdb_exit();
- return 0;
+exit:
+ logging_close();
+ return retval;
}
-
~ianmdlvl / elogind.git / blobdiff