/*
* udev.c
*
- * Userspace devfs
- *
- * Copyright (C) 2003,2004 Greg Kroah-Hartman <greg@kroah.com>
+ * Copyright (C) 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
+ * Copyright (C) 2004-2005 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 <stddef.h>
#include <stdlib.h>
#include <string.h>
+#include <fcntl.h>
#include <ctype.h>
#include <errno.h>
#include <signal.h>
+#include <unistd.h>
+#include <syslog.h>
#include "libsysfs/sysfs/libsysfs.h"
+#include "udev_libc_wrapper.h"
#include "udev.h"
-#include "udev_lib.h"
+#include "udev_utils.h"
+#include "udev_sysfs.h"
#include "udev_version.h"
+#include "udev_rules.h"
#include "logging.h"
-#include "namedev.h"
-#include "udevdb.h"
-
-/* global variables */
-char **main_argv;
-char **main_envp;
-
-/* local variables */
-static int is_udevstart;
-#ifdef LOG
-unsigned char logname[LOGNAME_SIZE];
-void log_message(int level, const char *format, ...)
+#ifdef USE_LOG
+void log_message(int priority, const char *format, ...)
{
va_list args;
- if (!udev_log)
+ if (priority > udev_log_priority)
return;
va_start(args, format);
- vsyslog(level, format, args);
+ vsyslog(priority, format, args);
va_end(args);
}
#endif
-asmlinkage static void sig_handler(int signum)
+static void asmlinkage sig_handler(int signum)
{
switch (signum) {
+ case SIGALRM:
+ exit(1);
case SIGINT:
case SIGTERM:
- udevdb_exit();
exit(20 + signum);
- default:
- dbg("unhandled signal %d", signum);
}
}
-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)
+int main(int argc, char *argv[], char *envp[])
{
- int retval = -EINVAL;
- int i;
+ struct udevice udev;
+ struct udev_rules rules;
+ const char *action;
+ const char *devpath;
+ const char *subsystem;
struct sigaction act;
- const int nofake = 0;
-
- dbg("looking at '%s'", devpath);
+ int devnull;
+ int retval = -EINVAL;
- /* 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 (argc == 2 && strcmp(argv[1], "-V") == 0) {
+ printf("%s\n", UDEV_VERSION);
+ exit(0);
}
- 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++;
+ /* set std fd's to /dev/null, if the kernel forks us, we don't have them at all */
+ devnull = open("/dev/null", O_RDWR);
+ if (devnull >= 0) {
+ if (devnull != STDIN_FILENO)
+ dup2(devnull, STDIN_FILENO);
+ if (devnull != STDOUT_FILENO)
+ dup2(devnull, STDOUT_FILENO);
+ if (devnull != STDERR_FILENO)
+ dup2(devnull, STDERR_FILENO);
+ if (devnull > STDERR_FILENO)
+ close(devnull);
}
- /* initialize udev database */
- retval = udevdb_init(UDEVDB_DEFAULT);
- if (retval != 0) {
- dbg("unable to initialize database");
- goto exit;
- }
+ logging_init("udev");
+ if (devnull < 0)
+ err("fatal, could not open /dev/null");
+ udev_init_config();
+ dbg("version %s", UDEV_VERSION);
/* set signal handlers */
- act.sa_handler = sig_handler;
+ memset(&act, 0x00, sizeof(act));
+ act.sa_handler = (void (*)(int)) sig_handler;
sigemptyset (&act.sa_mask);
- act.sa_flags = SA_RESTART;
+ act.sa_flags = 0;
+ sigaction(SIGALRM, &act, NULL);
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;
- }
-
- if (strcmp(action, "remove") == 0) {
- retval = udev_remove_device(devpath, subsystem);
- goto action_done;
- }
-
- dbg("unknown action '%s'", action);
- retval = -EINVAL;
+ /* trigger timeout to prevent hanging processes */
+ alarm(UDEV_ALARM_TIMEOUT);
-action_done:
- udevdb_exit();
+ action = getenv("ACTION");
+ devpath = getenv("DEVPATH");
+ subsystem = getenv("SUBSYSTEM");
+ /* older kernels passed the SUBSYSTEM only as argument */
+ if (!subsystem && argc == 2)
+ subsystem = argv[1];
-exit:
- return retval;
-}
-
-static int udev_hotplug(void)
-{
- char *action;
- char *devpath;
- char *subsystem;
-
- action = get_action();
- if (!action) {
- dbg("no action?");
- return -EINVAL;
+ if (!action || !subsystem || !devpath) {
+ err("action, subsystem or devpath missing");
+ goto exit;
}
- devpath = get_devpath();
- if (!devpath) {
- dbg("no devpath?");
- return -EINVAL;
- }
+ /* export log_priority , as called programs may want to do the same as udev */
+ if (udev_log_priority) {
+ char priority[32];
- /* skip blacklisted subsystems */
- subsystem = get_subsystem(main_argv[1]);
- if (!subsystem) {
- dbg("no subsystem?");
- return -EINVAL;
+ sprintf(priority, "%i", udev_log_priority);
+ setenv("UDEV_LOG", priority, 1);
}
- return __udev_hotplug(action, devpath, subsystem);
-}
+ udev_init_device(&udev, devpath, subsystem, action);
+ udev_rules_init(&rules, 1, 0);
-int main(int argc, char *argv[], char *envp[])
-{
- main_argv = argv;
- main_envp = envp;
+ retval = udev_process_event(&rules, &udev);
- if (strstr(argv[0], "udevstart")) {
- /* Setup env variables. */
- setenv("UDEV_NO_SLEEP", "1", 1);
- is_udevstart = 1;
- }
+ if (!retval && udev_run && !list_empty(&udev.run_list)) {
+ struct name_entry *name_loop;
- /* initialize our configuration */
- udev_init_config();
+ dbg("executing run list");
+ list_for_each_entry(name_loop, &udev.run_list, node) {
+ if (strncmp(name_loop->name, "socket:", strlen("socket:")) == 0)
+ pass_env_to_socket(&name_loop->name[strlen("socket:")], devpath, action);
+ else
+ run_program(name_loop->name, udev.subsystem, NULL, 0, NULL, (udev_log_priority >= LOG_INFO));
+ }
+ }
- dbg("version %s", UDEV_VERSION);
+ udev_rules_close(&rules);
+ udev_cleanup_device(&udev);
- if (is_udevstart) {
- namedev_init();
- return udev_start();
- } else
- return udev_hotplug();
+exit:
+ logging_close();
+ return retval;
}
~ianmdlvl / elogind.git / blobdiff