/*
* 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"
-
-#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
int main(int argc, char *argv[], char *envp[])
{
- struct sigaction act;
- struct sysfs_class_device *class_dev;
struct udevice udev;
- char path[SYSFS_PATH_MAX];
+ struct udev_rules rules;
+ const char *action;
+ const char *devpath;
+ const char *subsystem;
+ struct sigaction act;
+ int devnull;
int retval = -EINVAL;
- enum {
- ADD,
- REMOVE,
- UDEVSTART,
- } act_type;
-
- dbg("version %s", UDEV_VERSION);
- logging_init("udev");
- udev_init_config();
-
- if (strstr(argv[0], "udevstart") || (argv[1] != NULL && strstr(argv[1], "udevstart"))) {
- act_type = UDEVSTART;
- } else {
- const char *action = getenv("ACTION");
- const char *devpath = getenv("DEVPATH");
- const char *subsystem = argv[1];
-
- 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("no action '%s' for us", action);
- goto exit;
- }
-
- 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;
- }
- if (!subsystem) {
- dbg("no subsystem");
- goto exit;
- }
-
- udev_set_values(&udev, devpath, subsystem, action);
-
- /* skip blacklisted subsystems */
- if (udev.type != 'n' && subsystem_expect_no_dev(subsystem)) {
- dbg("don't care about '%s' devices", subsystem);
- goto exit;
- };
+ if (argc == 2 && strcmp(argv[1], "-V") == 0) {
+ printf("%s\n", UDEV_VERSION);
+ exit(0);
+ }
+ /* 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);
}
+ 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 = (void (*) (int))sig_handler;
+ memset(&act, 0x00, sizeof(act));
+ act.sa_handler = (void (*)(int)) sig_handler;
sigemptyset (&act.sa_mask);
act.sa_flags = 0;
- /* 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);
-
- switch(act_type) {
- case UDEVSTART:
- dbg("udevstart");
- namedev_init();
- retval = udev_start();
- break;
- case ADD:
- dbg("udev add");
-
- /* open the device */
- snprintf(path, SYSFS_PATH_MAX, "%s%s", sysfs_path, udev.devpath);
- class_dev = sysfs_open_class_device_path(path);
- if (class_dev == NULL) {
- dbg ("sysfs_open_class_device_path failed");
- break;
- }
- dbg("opened class_dev->name='%s'", class_dev->name);
+ /* trigger timeout to prevent hanging processes */
+ alarm(UDEV_ALARM_TIMEOUT);
+
+ action = getenv("ACTION");
+ devpath = getenv("DEVPATH");
+ subsystem = getenv("SUBSYSTEM");
+ /* older kernels passed the SUBSYSTEM only as argument */
+ if (!subsystem && argc == 2)
+ subsystem = argv[1];
- /* init rules */
- namedev_init();
+ if (!action || !subsystem || !devpath) {
+ err("action, subsystem or devpath missing");
+ goto exit;
+ }
- /* name, create node, store in db */
- retval = udev_add_device(&udev, class_dev);
+ /* export log_priority , as called programs may want to do the same as udev */
+ if (udev_log_priority) {
+ char priority[32];
- /* run scripts */
- dev_d_execute(&udev);
+ sprintf(priority, "%i", udev_log_priority);
+ setenv("UDEV_LOG", priority, 1);
+ }
- sysfs_close_class_device(class_dev);
- break;
- case REMOVE:
- dbg("udev remove");
+ udev_init_device(&udev, devpath, subsystem, action);
+ udev_rules_init(&rules, 1, 0);
- /* get node from db, delete it*/
- retval = udev_remove_device(&udev);
+ retval = udev_process_event(&rules, &udev);
- /* run scripts */
- dev_d_execute(&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
+ run_program(name_loop->name, udev.subsystem, NULL, 0, NULL, (udev_log_priority >= LOG_INFO));
+ }
}
+ udev_rules_close(&rules);
+ udev_cleanup_device(&udev);
+
exit:
logging_close();
return retval;
~ianmdlvl / elogind.git / blobdiff