diff options
Diffstat (limited to 'udevtrigger.c')
-rw-r--r-- | udevtrigger.c | 264 |
1 files changed, 0 insertions, 264 deletions
diff --git a/udevtrigger.c b/udevtrigger.c deleted file mode 100644 index 5013189..0000000 --- a/udevtrigger.c +++ /dev/null @@ -1,264 +0,0 @@ -/* - * 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; -} |