mirror of
https://github.com/AuxXxilium/eudev.git
synced 2024-12-16 03:27:49 +07:00
57218a0873
this should fix the startup issue for lvm, hopefully...
205 lines
4.9 KiB
C
205 lines
4.9 KiB
C
/*
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* udevstart.c
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*
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* Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
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*
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* Quick and dirty way to populate a /dev with udev if your system
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* does not have access to a shell. Based originally on a patch to udev
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* from Harald Hoyer <harald@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <errno.h>
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#include <ctype.h>
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#include <dirent.h>
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#include <sys/wait.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "logging.h"
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#include "udev_lib.h"
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#ifdef LOG
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unsigned char logname[LOGNAME_SIZE];
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void log_message(int level, const char *format, ...)
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{
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va_list args;
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va_start(args, format);
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vsyslog(level, format, args);
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va_end(args);
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}
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#endif
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#define MAX_PATHLEN 1024
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#define SYSBLOCK "/sys/block"
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#define SYSCLASS "/sys/class"
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#define UDEV_BIN "/sbin/udev"
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static void udev_exec(const char *path, const char* subsystem)
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{
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pid_t pid;
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char action[] = "ACTION=add";
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char devpath[MAX_PATHLEN];
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char nosleep[] = "UDEV_NO_SLEEP=1";
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char *env[] = { action, devpath, nosleep, NULL };
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strcpy(devpath, "DEVPATH=");
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strfieldcat(devpath, path);
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pid = fork();
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switch (pid) {
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case 0:
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/* child */
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execle(UDEV_BIN, "udev", subsystem, NULL, env);
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dbg("exec of child failed");
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exit(1);
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break;
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case -1:
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dbg("fork of child failed");
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break;
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default:
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wait(NULL);
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}
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}
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static void udev_scan(void)
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{
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char *devpath;
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DIR *dir;
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struct dirent *dent;
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/*
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* We want to scan the class tree first as lvm and dm needs to be able
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* to have access to the char control device when probing the block
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* devices.
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*/
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devpath = "class";
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dir = opendir(SYSCLASS);
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if (dir != NULL) {
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for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
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char dirname[MAX_PATHLEN];
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DIR *dir2;
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struct dirent *dent2;
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if ((strcmp(dent->d_name, ".") == 0) ||
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(strcmp(dent->d_name, "..") == 0))
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continue;
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snprintf(dirname, MAX_PATHLEN, "%s/%s", SYSCLASS, dent->d_name);
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dirname[MAX_PATHLEN] = '\0';
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dir2 = opendir(dirname);
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if (dir2 != NULL) {
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for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
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char dirname2[MAX_PATHLEN-1];
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DIR *dir3;
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struct dirent *dent3;
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if ((strcmp(dent2->d_name, ".") == 0) ||
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(strcmp(dent2->d_name, "..") == 0))
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continue;
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snprintf(dirname2, MAX_PATHLEN, "%s/%s", dirname, dent2->d_name);
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dirname2[MAX_PATHLEN-1] = '\0';
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dir3 = opendir(dirname2);
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if (dir3 != NULL) {
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for (dent3 = readdir(dir3); dent3 != NULL; dent3 = readdir(dir3)) {
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char filename[MAX_PATHLEN];
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if (strcmp(dent3->d_name, "dev") == 0) {
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snprintf(filename, MAX_PATHLEN, "/class/%s/%s",
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dent->d_name, dent2->d_name);
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filename[MAX_PATHLEN-1] = '\0';
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udev_exec(filename, dent->d_name);
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}
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}
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closedir(dir3);
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}
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}
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closedir(dir2);
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}
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}
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closedir(dir);
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}
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devpath = "block";
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dir = opendir(SYSBLOCK);
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if (dir != NULL) {
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for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
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char dirname[MAX_PATHLEN];
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DIR *dir2;
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struct dirent *dent2;
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if ((strcmp(dent->d_name, ".") == 0) ||
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(strcmp(dent->d_name, "..") == 0))
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continue;
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snprintf(dirname, MAX_PATHLEN, "/block/%s", dent->d_name);
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dirname[MAX_PATHLEN-1] = '\0';
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udev_exec(dirname, "block");
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snprintf(dirname, MAX_PATHLEN, "%s/%s", SYSBLOCK, dent->d_name);
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dir2 = opendir(dirname);
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if (dir2 != NULL) {
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for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
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char dirname2[MAX_PATHLEN];
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DIR *dir3;
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struct dirent *dent3;
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if ((strcmp(dent2->d_name, ".") == 0) ||
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(strcmp(dent2->d_name, "..") == 0))
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continue;
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snprintf(dirname2, MAX_PATHLEN, "%s/%s", dirname, dent2->d_name);
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dirname2[MAX_PATHLEN-1] = '\0';
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dir3 = opendir(dirname2);
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if (dir3 != NULL) {
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for (dent3 = readdir(dir3); dent3 != NULL; dent3 = readdir(dir3)) {
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char filename[MAX_PATHLEN];
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if (strcmp(dent3->d_name, "dev") == 0) {
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snprintf(filename, MAX_PATHLEN, "/block/%s/%s",
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dent->d_name, dent2->d_name);
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filename[MAX_PATHLEN-1] = '\0';
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udev_exec(filename, "block");
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}
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}
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closedir(dir3);
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}
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}
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closedir(dir2);
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}
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}
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closedir(dir);
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}
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}
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int main(int argc, char *argv[], char *envp[])
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{
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init_logging("udevstart");
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udev_scan();
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return 0;
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}
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