+++ /dev/null
-/*
- * Copyright (C) 2004-2006 Kay Sievers <kay@vrfy.org>
- * Copyright (C) 2006 Hannes Reinecke <hare@suse.de>
- *
- * 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 <stdarg.h>
-#include <stdio.h>
-#include <stdbool.h>
-#include <unistd.h>
-#include <getopt.h>
-#include <errno.h>
-#include <dirent.h>
-#include <fcntl.h>
-#include <syslog.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <string.h>
-
-#define PATH_SIZE 512
-
-#ifndef strlcpy
-#define strlcpy(d,s,l) (strncpy(d,s,l), (d)[(l)-1] = '\0')
-#endif
-
-#ifndef strlcat
-#define strlcat(d,s,l) strncat(d,s,(l)-strlen(d)-1)
-#endif
-
-static int verbose;
-static int dry_run;
-
-static void log_message(int priority, const char *format, ...)
-{
- va_list args;
-
- va_start(args, format);
- vsyslog(priority, format, args);
- va_end(args);
-}
-
-#undef err
-#define err(format, arg...) \
- do { \
- log_message(LOG_ERR ,"%s: " format ,__FUNCTION__ ,## arg); \
- } while (0)
-
-#undef info
-#define info(format, arg...) \
- do { \
- log_message(LOG_INFO ,"%s: " format ,__FUNCTION__ ,## arg); \
- } while (0)
-
-#ifdef DEBUG
-#undef dbg
-#define dbg(format, arg...) \
- do { \
- log_message(LOG_DEBUG ,"%s: " format ,__FUNCTION__ ,## arg); \
- } while (0)
-#else
-#define dbg(...) do {} while(0)
-#endif
-
-
-static void trigger_uevent(const char *devpath)
-{
- char filename[PATH_SIZE];
- int fd;
-
- strlcpy(filename, "/sys", sizeof(filename));
- strlcat(filename, devpath, sizeof(filename));
- strlcat(filename, "/uevent", sizeof(filename));
-
- if (verbose)
- printf("%s\n", devpath);
-
- if (dry_run)
- return;
-
- fd = open(filename, O_WRONLY);
- if (fd < 0) {
- dbg("error on opening %s: %s\n", filename, strerror(errno));
- return;
- }
-
- if (write(fd, "add", 3) < 0)
- info("error on triggering %s: %s\n", filename, strerror(errno));
-
- close(fd);
-}
-
-static int sysfs_resolve_link(char *devpath, size_t size)
-{
- char link_path[PATH_SIZE];
- char link_target[PATH_SIZE];
- int len;
- int i;
- int back;
-
- strlcpy(link_path, "/sys", sizeof(link_path));
- strlcat(link_path, devpath, sizeof(link_path));
- len = readlink(link_path, link_target, sizeof(link_target));
- if (len <= 0)
- return -1;
- link_target[len] = '\0';
- dbg("path link '%s' points to '%s'", devpath, link_target);
-
- for (back = 0; strncmp(&link_target[back * 3], "../", 3) == 0; back++)
- ;
- dbg("base '%s', tail '%s', back %i", devpath, &link_target[back * 3], back);
- for (i = 0; i <= back; i++) {
- char *pos = strrchr(devpath, '/');
-
- if (pos == NULL)
- return -1;
- pos[0] = '\0';
- }
- dbg("after moving back '%s'", devpath);
- strlcat(devpath, "/", size);
- strlcat(devpath, &link_target[back * 3], size);
- return 0;
-}
-
-static bool device_has_attribute(const char *path, const char *attr,
- mode_t mode)
-{
- char filename[PATH_SIZE];
- struct stat statbuf;
-
- strlcpy(filename, path, sizeof(filename));
- strlcat(filename, attr, sizeof(filename));
-
- if (stat(filename, &statbuf) < 0)
- return false;
-
- if (!(statbuf.st_mode & mode))
- return false;
-
- return true;
-}
-
-static int device_list_insert(const char *path)
-{
- char devpath[PATH_SIZE];
- struct stat statbuf;
-
- dbg("add '%s'" , path);
-
- /* we only have a device, if we have a dev and an uevent file */
- if (!device_has_attribute(path, "/dev", S_IRUSR) ||
- !device_has_attribute(path, "/uevent", S_IWUSR))
- return -1;
-
- strlcpy(devpath, &path[4], sizeof(devpath));
-
- /* resolve possible link to real target */
- if (lstat(path, &statbuf) < 0)
- return -1;
- if (S_ISLNK(statbuf.st_mode))
- if (sysfs_resolve_link(devpath, sizeof(devpath)) != 0)
- return -1;
-
- trigger_uevent(devpath);
- return 0;
-}
-
-static void scan_subdir(const char *base, const char *subdir,
- bool insert, int depth)
-{
- DIR *dir;
- struct dirent *dent;
-
- dir = opendir(base);
- if (dir == NULL)
- return;
-
- for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
- char dirname[PATH_SIZE];
-
- if (dent->d_name[0] == '.')
- continue;
-
- strlcpy(dirname, base, sizeof(dirname));
- strlcat(dirname, "/", sizeof(dirname));
- strlcat(dirname, dent->d_name, sizeof(dirname));
-
- if (insert) {
- int err;
-
- err = device_list_insert(dirname);
- if (err)
- continue;
- }
-
- if (subdir)
- strlcat(dirname, subdir, sizeof(base));
-
- if (depth)
- scan_subdir(dirname, NULL, true, depth - 1);
- }
-
- closedir(dir);
-}
-
-int main(int argc, char *argv[], char *envp[])
-{
- struct stat statbuf;
- int option;
-
- openlog("udevtrigger", LOG_PID | LOG_CONS, LOG_DAEMON);
-
- while (1) {
- option = getopt(argc, argv, "vnh");
- if (option == -1)
- break;
-
- switch (option) {
- case 'v':
- verbose = 1;
- break;
- case 'n':
- dry_run = 1;
- break;
- case 'h':
- printf("Usage: udevtrigger OPTIONS\n"
- " -v print the list of devices while running\n"
- " -n do not actually trigger the events\n"
- " -h print this text\n"
- "\n");
- goto exit;
- default:
- goto exit;
- }
- }
-
-
- /* if we have /sys/subsystem, forget all the old stuff */
- scan_subdir("/sys/bus", "/devices", false, 1);
- scan_subdir("/sys/class", NULL, false, 1);
-
- /* scan "block" if it isn't a "class" */
- if (stat("/sys/class/block", &statbuf) != 0)
- scan_subdir("/sys/block", NULL, true, 1);
-
-exit:
-
- closelog();
- return 0;
-}
projects / project / procd.git / blobdiff