/*
* udev.c
*
- * Userspace devfs
- *
- * Copyright (C) 2003 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 <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 <syslog.h>
#include "udev.h"
-#include "udev_version.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];
+#include "udev_rules.h"
-
-static inline char *get_action(void)
+#ifdef USE_LOG
+void log_message(int priority, const char *format, ...)
{
- char *action;
+ va_list args;
- action = getenv("ACTION");
- return action;
-}
-
-static inline char *get_devpath(void)
-{
- char *devpath;
+ if (priority > udev_log_priority)
+ return;
- devpath = getenv("DEVPATH");
- return devpath;
+ va_start(args, format);
+ vsyslog(priority, format, args);
+ va_end(args);
}
+#endif
-static inline char *get_seqnum(void)
+static void asmlinkage 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 = UDEV_CONFIG_FILE;
- char *udev_permission = UDEV_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("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 SIGALRM:
+ exit(1);
+ case SIGINT:
+ case SIGTERM:
+ exit(20 + 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)
+int main(int argc, char *argv[], char *envp[])
{
- char *action;
- char *devpath;
- char *subsystem;
+ 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;
+ int devnull;
int retval = -EINVAL;
-
- main_argv = argv;
- main_envp = envp;
- dbg("version %s", UDEV_VERSION);
+ if (argc == 2 && strcmp(argv[1], "-V") == 0) {
+ printf("%s\n", UDEV_VERSION);
+ exit(0);
+ }
- if (argc != 2) {
- dbg ("unknown number of arguments");
- goto exit;
+ /* 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);
}
- subsystem = argv[1];
+ logging_init("udev");
+ if (devnull < 0)
+ err("fatal, could not open /dev/null: %s", strerror(errno));
+ udev_config_init();
+ dbg("version %s", UDEV_VERSION);
- devpath = get_devpath();
- if (!devpath) {
- dbg ("no devpath?");
- goto exit;
- }
- dbg("looking at '%s'", devpath);
+ /* 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);
- /* 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;
- }
+ /* trigger timeout to prevent hanging processes */
+ alarm(UDEV_ALARM_TIMEOUT);
- /* but we don't care about net class devices */
- if (strcmp(subsystem, "net") == 0) {
- dbg("don't care about net devices");
- 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];
- action = get_action();
- if (!action) {
- dbg ("no action?");
+ if (action == NULL || subsystem == NULL || devpath == NULL) {
+ err("action, subsystem or devpath missing");
goto exit;
}
- /* initialize udev database */
- get_dirs();
- retval = udevdb_init(UDEVDB_DEFAULT);
- if (retval != 0) {
- dbg("unable to initialize database");
- goto exit;
- }
+ /* export log_priority , as called programs may want to do the same as udev */
+ if (udev_log_priority) {
+ char priority[32];
- /* initialize the naming deamon */
- namedev_init();
+ sprintf(priority, "%i", udev_log_priority);
+ setenv("UDEV_LOG", priority, 1);
+ }
- if (strcmp(action, "add") == 0)
- retval = udev_add_device(devpath, subsystem);
+ sysfs_init();
+ udev_rules_init(&rules, 0);
- else if (strcmp(action, "remove") == 0)
- retval = udev_remove_device(devpath, subsystem);
+ dev = sysfs_device_get(devpath);
+ if (dev == NULL) {
+ info("unable to open '%s'", devpath);
+ goto fail;
+ }
- else {
- dbg("unknown action '%s'", action);
- retval = -EINVAL;
+ 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));
+ udev_rules_apply_format(udev, program, sizeof(program));
+ run_program(program, udev->dev->subsystem, NULL, 0, NULL, (udev_log_priority >= LOG_INFO));
+ }
+ }
}
- udevdb_exit();
-exit:
+ udev_device_cleanup(udev);
+fail:
+ udev_rules_cleanup(&rules);
+ sysfs_cleanup();
+
+exit:
+ logging_close();
return retval;
}
~ianmdlvl / elogind.git / blobdiff