*
* 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 "libsysfs/sysfs/libsysfs.h"
#include "udev.h"
+#include "udev_lib.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];
+/* local variables */
+static int is_udevstart;
-
-static inline char *get_action(void)
+#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;
-}
-
-static inline char *get_devpath(void)
-{
- char *devpath;
+ if (!udev_log)
+ return;
- devpath = getenv("DEVPATH");
- return devpath;
+ va_start(args, format);
+ vsyslog(level, format, args);
+ va_end(args);
}
+#endif
-static inline char *get_seqnum(void)
+asmlinkage static void sig_handler(int signum)
{
- char *seqnum;
-
- seqnum = getenv("SEQNUM");
- return seqnum;
-}
-
-static void get_dirs(void)
-{
- char *temp;
- char *udev_db = UDEV_DB;
- char *udev_config = NAMEDEV_CONFIG_FILE;
- char *udev_permission = NAMEDEV_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 SIGINT:
+ case SIGTERM:
+ udevdb_exit();
+ exit(20 + signum);
+ default:
+ dbg("unhandled signal %d", 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)
+static char *subsystem_blacklist[] = {
+ "scsi_host",
+ "scsi_device",
+ "usb_host",
+ "pci_bus",
+ "pcmcia_socket",
+ ""
+};
+
+int __udev_hotplug(char *action, const char *devpath, const char *subsystem)
{
- char *action;
- char *devpath;
- char *subsystem;
int retval = -EINVAL;
-
- main_argv = argv;
- main_envp = envp;
+ int i;
+ struct sigaction act;
+ const int nofake = 0;
- dbg("version %s", UDEV_VERSION);
+ dbg("looking at '%s'", devpath);
- if (argc != 2) {
- dbg ("unknown number of arguments");
+ /* 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 = argv[1];
+ i = 0;
+ while (subsystem_blacklist[i][0] != '\0') {
+ if (strcmp(subsystem, subsystem_blacklist[i]) == 0) {
+ dbg("don't care about '%s' devices", subsystem);
+ goto exit;
+ }
+ i++;
+ }
- devpath = get_devpath();
- if (!devpath) {
- dbg ("no devpath?");
+ /* initialize udev database */
+ retval = udevdb_init(UDEVDB_DEFAULT);
+ if (retval != 0) {
+ dbg("unable to initialize database");
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;
+ /* set signal handlers */
+ act.sa_handler = sig_handler;
+ sigemptyset (&act.sa_mask);
+ act.sa_flags = SA_RESTART;
+ sigaction(SIGINT, &act, NULL);
+ sigaction(SIGTERM, &act, NULL);
+
+ if (strcmp(action, "add") == 0) {
+ /* Already done. */
+ if (!is_udevstart)
+ namedev_init();
+ retval = udev_add_device(devpath, subsystem, nofake);
+ goto action_done;
}
- /* but we don't care about net class devices */
- if (strcmp(subsystem, "net") == 0) {
- dbg("don't care about net devices");
- goto exit;
+ if (strcmp(action, "remove") == 0) {
+ retval = udev_remove_device(devpath, subsystem);
+ goto action_done;
}
+ dbg("unknown action '%s'", action);
+ retval = -EINVAL;
+
+action_done:
+ udevdb_exit();
+
+exit:
+ return retval;
+}
+
+static int udev_hotplug(void)
+{
+ char *action;
+ char *devpath;
+ char *subsystem;
+
action = get_action();
if (!action) {
- dbg ("no action?");
- goto exit;
+ dbg("no action?");
+ return -EINVAL;
}
- /* initialize udev database */
- get_dirs();
- retval = udevdb_init(UDEVDB_DEFAULT);
- if (retval != 0) {
- dbg("Unable to initialize database.");
- goto exit;
+ devpath = get_devpath();
+ if (!devpath) {
+ dbg("no devpath?");
+ return -EINVAL;
}
- /* initialize the naming deamon */
- namedev_init();
+ /* skip blacklisted subsystems */
+ subsystem = get_subsystem(main_argv[1]);
+ if (!subsystem) {
+ dbg("no subsystem?");
+ return -EINVAL;
+ }
- if (strcmp(action, "add") == 0)
- retval = udev_add_device(devpath, subsystem);
+ return __udev_hotplug(action, devpath, subsystem);
+}
- else if (strcmp(action, "remove") == 0)
- retval = udev_remove_device(devpath, subsystem);
+int main(int argc, char *argv[], char *envp[])
+{
+ main_argv = argv;
+ main_envp = envp;
- else {
- dbg("Unknown action: %s", action);
- retval = -EINVAL;
+ if (strstr(argv[0], "udevstart")) {
+ /* Setup env variables. */
+ setenv("UDEV_NO_SLEEP", "1", 1);
+ is_udevstart = 1;
}
- udevdb_exit();
-exit:
- return retval;
-}
+ /* initialize our configuration */
+ udev_init_config();
+
+ dbg("version %s", UDEV_VERSION);
+ if (is_udevstart) {
+ namedev_init();
+ return udev_start();
+ } else
+ return udev_hotplug();
+}
~ianmdlvl / elogind.git / blobdiff