+++ /dev/null
-/*
- * quick and dirty way to populate a /dev directory
- *
- * Copyright (C) 2004 Harald Hoyer <harald@redhat.com>
- * Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
- * Copyright (C) 2004-2006 Kay Sievers <kay@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
- * Free Software Foundation version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
- */
-
-#include <stdlib.h>
-#include <stddef.h>
-#include <string.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <errno.h>
-#include <ctype.h>
-#include <dirent.h>
-#include <signal.h>
-#include <syslog.h>
-#include <sys/wait.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-
-#include "udev.h"
-#include "udev_rules.h"
-#include "udev_selinux.h"
-
-static const char *udev_run_str;
-static const char *udev_log_str;
-static struct udev_rules rules;
-
-#ifdef USE_LOG
-void log_message(int priority, const char *format, ...)
-{
- va_list args;
-
- if (priority > udev_log_priority)
- return;
-
- va_start(args, format);
- vsyslog(priority, format, args);
- va_end(args);
-}
-#endif
-
-struct device {
- struct list_head node;
- char path[PATH_SIZE];
-};
-
-/* sort files in lexical order */
-static int device_list_insert(const char *path, struct list_head *device_list)
-{
- struct device *loop_device;
- struct device *new_device;
- const char *devpath = &path[strlen(sysfs_path)];
-
- dbg("insert: '%s'", devpath);
-
- list_for_each_entry(loop_device, device_list, node) {
- if (strcmp(loop_device->path, devpath) > 0) {
- break;
- }
- }
-
- new_device = malloc(sizeof(struct device));
- if (new_device == NULL) {
- dbg("error malloc");
- return -ENOMEM;
- }
-
- strlcpy(new_device->path, devpath, sizeof(new_device->path));
- list_add_tail(&new_device->node, &loop_device->node);
- dbg("add '%s'" , new_device->path);
- return 0;
-}
-
-/* list of devices that we should run last due to any one of a number of reasons */
-static char *last_list[] = {
- "/block/dm", /* on here because dm wants to have the block devices around before it */
- NULL,
-};
-
-/* list of devices that we should run first due to any one of a number of reasons */
-static char *first_list[] = {
- "/class/mem",
- "/class/tty",
- NULL,
-};
-
-static int add_device(const char *devpath)
-{
- struct sysfs_device *dev;
- struct udevice *udev;
- int retval = 0;
-
- /* clear and set environment for next event */
- clearenv();
- setenv("ACTION", "add", 1);
- setenv("UDEV_START", "1", 1);
- if (udev_log_str)
- setenv("UDEV_LOG", udev_log_str, 1);
- if (udev_run_str)
- setenv("UDEV_RUN", udev_run_str, 1);
-
- dev = sysfs_device_get(devpath);
- if (dev == NULL)
- return -1;
-
- udev = udev_device_init(NULL);
- if (udev == NULL)
- return -1;
-
- /* override built-in sysfs device */
- udev->dev = dev;
- strcpy(udev->action, "add");
-
- if (strcmp(udev->dev->subsystem, "net") != 0) {
- udev->devt = udev_device_get_devt(udev);
- if (major(udev->devt) == 0)
- return -1;
- }
-
- dbg("add '%s'", udev->dev->devpath);
- setenv("DEVPATH", udev->dev->devpath, 1);
- setenv("SUBSYSTEM", udev->dev->subsystem, 1);
-
- udev_rules_get_name(&rules, udev);
- if (udev->ignore_device) {
- dbg("device event will be ignored");
- goto exit;
- }
- if (udev->name[0] != '\0')
- retval = udev_device_event(&rules, udev);
- else
- info("device node creation supressed");
-
- if (retval == 0 && udev_run)
- udev_rules_run(udev);
-
-exit:
- udev_device_cleanup(udev);
- return 0;
-}
-
-static void exec_list(struct list_head *device_list)
-{
- struct device *loop_device;
- struct device *tmp_device;
- int i;
-
- /* handle the "first" type devices first */
- list_for_each_entry_safe(loop_device, tmp_device, device_list, node) {
- for (i = 0; first_list[i] != NULL; i++) {
- if (strncmp(loop_device->path, first_list[i], strlen(first_list[i])) == 0) {
- add_device(loop_device->path);
- list_del(&loop_device->node);
- free(loop_device);
- break;
- }
- }
- }
-
- /* handle the devices we are allowed to, excluding the "last" type devices */
- list_for_each_entry_safe(loop_device, tmp_device, device_list, node) {
- int found = 0;
- for (i = 0; last_list[i] != NULL; i++) {
- if (strncmp(loop_device->path, last_list[i], strlen(last_list[i])) == 0) {
- found = 1;
- break;
- }
- }
- if (found)
- continue;
-
- add_device(loop_device->path);
- list_del(&loop_device->node);
- free(loop_device);
- }
-
- /* handle the rest of the devices left over, if any */
- list_for_each_entry_safe(loop_device, tmp_device, device_list, node) {
- add_device(loop_device->path);
- list_del(&loop_device->node);
- free(loop_device);
- }
-}
-
-static int has_devt(const char *path)
-{
- char filename[PATH_SIZE];
- struct stat statbuf;
-
- snprintf(filename, sizeof(filename), "%s/dev", path);
- filename[sizeof(filename)-1] = '\0';
-
- if (stat(filename, &statbuf) == 0)
- return 1;
-
- return 0;
-}
-
-static void udev_scan_block(struct list_head *device_list)
-{
- char base[PATH_SIZE];
- DIR *dir;
- struct dirent *dent;
-
- snprintf(base, sizeof(base), "%s/block", sysfs_path);
- base[sizeof(base)-1] = '\0';
-
- dir = opendir(base);
- if (dir != NULL) {
- for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
- char dirname[PATH_SIZE];
- DIR *dir2;
- struct dirent *dent2;
-
- if (dent->d_name[0] == '.')
- continue;
-
- snprintf(dirname, sizeof(dirname), "%s/%s", base, dent->d_name);
- dirname[sizeof(dirname)-1] = '\0';
- if (has_devt(dirname))
- device_list_insert(dirname, device_list);
- else
- continue;
-
- /* look for partitions */
- dir2 = opendir(dirname);
- if (dir2 != NULL) {
- for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
- char dirname2[PATH_SIZE];
-
- if (dent2->d_name[0] == '.')
- continue;
-
- snprintf(dirname2, sizeof(dirname2), "%s/%s", dirname, dent2->d_name);
- dirname2[sizeof(dirname2)-1] = '\0';
-
- if (has_devt(dirname2))
- device_list_insert(dirname2, device_list);
- }
- closedir(dir2);
- }
- }
- closedir(dir);
- }
-}
-
-static void udev_scan_class(struct list_head *device_list)
-{
- char base[PATH_SIZE];
- DIR *dir;
- struct dirent *dent;
-
- snprintf(base, sizeof(base), "%s/class", sysfs_path);
- base[sizeof(base)-1] = '\0';
-
- dir = opendir(base);
- if (dir != NULL) {
- for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
- char dirname[PATH_SIZE];
- DIR *dir2;
- struct dirent *dent2;
-
- if (dent->d_name[0] == '.')
- continue;
-
- snprintf(dirname, sizeof(dirname), "%s/%s", base, dent->d_name);
- dirname[sizeof(dirname)-1] = '\0';
-
- dir2 = opendir(dirname);
- if (dir2 != NULL) {
- for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
- char dirname2[PATH_SIZE];
-
- if (dent2->d_name[0] == '.')
- continue;
-
- snprintf(dirname2, sizeof(dirname2), "%s/%s", dirname, dent2->d_name);
- dirname2[sizeof(dirname2)-1] = '\0';
-
- if (has_devt(dirname2) || strcmp(dent->d_name, "net") == 0)
- device_list_insert(dirname2, device_list);
- }
- closedir(dir2);
- }
- }
- closedir(dir);
- }
-}
-
-static void asmlinkage sig_handler(int signum)
-{
- switch (signum) {
- case SIGALRM:
- exit(1);
- case SIGINT:
- case SIGTERM:
- exit(20 + signum);
- }
-}
-
-int main(int argc, char *argv[], char *envp[])
-{
- LIST_HEAD(device_list);
- struct sigaction act;
-
- logging_init("udevstart");
- udev_config_init();
- selinux_init();
- dbg("version %s", UDEV_VERSION);
-
- udev_run_str = getenv("UDEV_RUN");
- udev_log_str = getenv("UDEV_LOG");
-
- /* disable all logging if not explicitely requested */
- if (udev_log_str == NULL)
- udev_log_priority = 0;
-
- /* 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);
-
- /* trigger timeout to prevent hanging processes */
- alarm(UDEV_ALARM_TIMEOUT);
-
- sysfs_init();
- udev_rules_init(&rules, 1);
-
- udev_scan_class(&device_list);
- udev_scan_block(&device_list);
- exec_list(&device_list);
-
- udev_rules_cleanup(&rules);
- sysfs_cleanup();
- selinux_exit();
- logging_close();
- return 0;
-}
~ianmdlvl / elogind.git / commitdiff