/*
* 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.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;
-
-/* global variables */
-char **main_argv;
-char **main_envp;
-
-#ifdef LOG
-unsigned char logname[LOGNAME_SIZE];
-void log_message(int level, const char *format, ...)
+#include "udev_rules.h"
+
+#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:
- gotalarm = 1;
- info("error: timeout reached, event probably not handled correctly");
- break;
+ 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 main(int argc, char *argv[], char *envp[])
{
- main_argv = argv;
- main_envp = envp;
+ struct sysfs_device *dev;
+ struct udevice *udev;
+ const char *maj, *min;
+ struct udev_rules rules;
+ const char *action;
+ const char *devpath;
+ const char *subsystem;
struct sigaction act;
- char *action;
- char *devpath = "";
- char *subsystem = "";
- int i;
+ int devnull;
int retval = -EINVAL;
- enum {
- ADD,
- REMOVE,
- UDEVSTART,
- } act_type;
- dbg("version %s", UDEV_VERSION);
+ if (argc == 2 && strcmp(argv[1], "-V") == 0) {
+ printf("%s\n", UDEV_VERSION);
+ exit(0);
+ }
- init_logging("udev");
+ /* 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);
+ }
- udev_init_config();
+ logging_init("udev");
+ if (devnull < 0)
+ err("fatal, could not open /dev/null: %s", strerror(errno));
+ udev_config_init();
+ dbg("version %s", UDEV_VERSION);
- 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;
- }
+ /* set signal handlers */
+ memset(&act, 0x00, sizeof(act));
+ act.sa_handler = (void (*)(int)) sig_handler;
+ sigemptyset (&act.sa_mask);
+ act.sa_flags = 0;
+ sigaction(SIGALRM, &act, NULL);
+ sigaction(SIGINT, &act, NULL);
+ sigaction(SIGTERM, &act, NULL);
- devpath = get_devpath();
- if (!devpath) {
- dbg("no devpath?");
- goto exit;
- }
- dbg("looking at '%s'", devpath);
+ /* trigger timeout to prevent hanging processes */
+ alarm(UDEV_ALARM_TIMEOUT);
- /* 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;
- }
+ action = getenv("ACTION");
+ devpath = getenv("DEVPATH");
+ subsystem = getenv("SUBSYSTEM");
+ /* older kernels passed the SUBSYSTEM only as argument */
+ if (subsystem == NULL && argc == 2)
+ subsystem = argv[1];
- subsystem = get_subsystem(main_argv[1]);
- if (!subsystem) {
- dbg("no subsystem?");
- goto exit;
- }
+ if (action == NULL || subsystem == NULL || devpath == NULL) {
+ err("action, subsystem or devpath missing");
+ goto exit;
+ }
- /* skip blacklisted subsystems */
- 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++;
- }
+ /* export log_priority , as called programs may want to do the same as udev */
+ if (udev_log_priority) {
+ char priority[32];
+
+ sprintf(priority, "%i", udev_log_priority);
+ setenv("UDEV_LOG", priority, 1);
}
- /* set signal handlers */
- act.sa_handler = sig_handler;
+ sysfs_init();
+ udev_rules_init(&rules, 0);
- sigemptyset (&act.sa_mask);
- /* alarm must interrupt syscalls*/
- sigaction(SIGALRM, &act, NULL);
- sigaction(SIGINT, &act, NULL);
- sigaction(SIGTERM, &act, NULL);
+ dev = sysfs_device_get(devpath);
+ if (dev == NULL) {
+ info("unable to open '%s'", devpath);
+ goto fail;
+ }
- /* 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();
- udev_sleep = 0;
- 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);
+ udev = udev_device_init();
+ if (udev == NULL)
+ goto fail;
+
+ /* override built-in sysfs device */
+ udev->dev = dev;
+ strlcpy(udev->action, action, sizeof(udev->action));
+
+ /* get dev_t from environment, which is needed for "remove" to work, "add" works also from sysfs */
+ maj = getenv("MAJOR");
+ min = getenv("MINOR");
+ if (maj != NULL && min != NULL)
+ udev->devt = makedev(atoi(maj), atoi(min));
+ else
+ udev->devt = udev_device_get_devt(udev);
+
+ retval = udev_device_event(&rules, udev);
+
+ if (!retval && udev_run && !list_empty(&udev->run_list)) {
+ struct name_entry *name_loop;
+
+ 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 {
+ char program[PATH_SIZE];
+
+ strlcpy(program, name_loop->name, sizeof(program));
+ apply_format(udev, program, sizeof(program));
+ run_program(program, udev->dev->subsystem, NULL, 0, NULL, (udev_log_priority >= LOG_INFO));
+ }
+ }
}
- udevdb_exit();
+ udev_device_cleanup(udev);
+fail:
+ udev_rules_cleanup(&rules);
+ sysfs_cleanup();
exit:
+ logging_close();
return retval;
}
~ianmdlvl / elogind.git / blobdiff