4 * Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
6 * Quick and dirty way to populate a /dev with udev if your system
7 * does not have access to a shell. Based originally on a patch to udev
8 * from Harald Hoyer <harald@redhat.com>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation version 2 of the License.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 675 Mass Ave, Cambridge, MA 02139, USA.
37 unsigned char logname[LOGNAME_SIZE];
38 void log_message(int level, const char *format, ...)
42 va_start(args, format);
43 vsyslog(level, format, args);
49 #define MAX_PATHLEN 1024
50 #define SYSBLOCK "/sys/block"
51 #define SYSCLASS "/sys/class"
52 #define UDEV_BIN "/sbin/udev"
54 static void udev_exec(const char *path, const char* subsystem)
57 char action[] = "ACTION=add";
58 char devpath[MAX_PATHLEN];
59 char nosleep[] = "UDEV_NO_SLEEP=1";
60 char *env[] = { action, devpath, nosleep, NULL };
62 snprintf(devpath, MAX_PATHLEN, "DEVPATH=%s", path);
63 devpath[MAX_PATHLEN-1] = '\0';
69 execle(UDEV_BIN, "udev", subsystem, NULL, env);
70 dbg("exec of child failed");
74 dbg("fork of child failed");
81 static int udev_scan(void)
89 dir = opendir(SYSBLOCK);
91 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
92 char dirname[MAX_PATHLEN];
96 if ((strcmp(dent->d_name, ".") == 0) ||
97 (strcmp(dent->d_name, "..") == 0))
100 snprintf(dirname, MAX_PATHLEN, "/block/%s", dent->d_name);
101 dirname[MAX_PATHLEN-1] = '\0';
102 udev_exec(dirname, "block");
104 snprintf(dirname, MAX_PATHLEN, "%s/%s", SYSBLOCK, dent->d_name);
105 dir2 = opendir(dirname);
107 for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
108 char dirname2[MAX_PATHLEN];
110 struct dirent *dent3;
112 if ((strcmp(dent2->d_name, ".") == 0) ||
113 (strcmp(dent2->d_name, "..") == 0))
116 snprintf(dirname2, MAX_PATHLEN, "%s/%s", dirname, dent2->d_name);
117 dirname2[MAX_PATHLEN-1] = '\0';
119 dir3 = opendir(dirname2);
121 for (dent3 = readdir(dir3); dent3 != NULL; dent3 = readdir(dir3)) {
122 char filename[MAX_PATHLEN];
124 if (strcmp(dent3->d_name, "dev") == 0) {
125 snprintf(filename, MAX_PATHLEN, "/block/%s/%s",
126 dent->d_name, dent2->d_name);
127 filename[MAX_PATHLEN-1] = '\0';
128 udev_exec(filename, "block");
138 dir = opendir(SYSCLASS);
140 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
141 char dirname[MAX_PATHLEN];
143 struct dirent *dent2;
145 if ((strcmp(dent->d_name, ".") == 0) ||
146 (strcmp(dent->d_name, "..") == 0))
149 snprintf(dirname, MAX_PATHLEN, "%s/%s", SYSCLASS, dent->d_name);
150 dirname[MAX_PATHLEN] = '\0';
151 dir2 = opendir(dirname);
153 for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
154 char dirname2[MAX_PATHLEN-1];
156 struct dirent *dent3;
158 if ((strcmp(dent2->d_name, ".") == 0) ||
159 (strcmp(dent2->d_name, "..") == 0))
162 snprintf(dirname2, MAX_PATHLEN, "%s/%s", dirname, dent2->d_name);
163 dirname2[MAX_PATHLEN-1] = '\0';
165 dir3 = opendir(dirname2);
167 for (dent3 = readdir(dir3); dent3 != NULL; dent3 = readdir(dir3)) {
168 char filename[MAX_PATHLEN];
170 if (strcmp(dent3->d_name, "dev") == 0) {
171 snprintf(filename, MAX_PATHLEN, "/class/%s/%s",
172 dent->d_name, dent2->d_name);
173 filename[MAX_PATHLEN-1] = '\0';
174 udev_exec(filename, dent->d_name);
190 int main(int argc, char *argv[], char *envp[])
192 init_logging("udevstart");