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.
32 #include <sys/types.h>
40 unsigned char logname[LOGNAME_SIZE];
41 void log_message(int level, const char *format, ...)
45 va_start(args, format);
46 vsyslog(level, format, args);
52 #define MAX_PATHLEN 1024
53 #define SYSBLOCK "/sys/block"
54 #define SYSCLASS "/sys/class"
55 #define UDEV_BIN "/sbin/udev"
57 static void udev_exec(const char *path, const char* subsystem)
60 char action[] = "ACTION=add";
61 char devpath[MAX_PATHLEN];
62 char nosleep[] = "UDEV_NO_SLEEP=1";
63 char *env[] = { action, devpath, nosleep, NULL };
65 strcpy(devpath, "DEVPATH=");
66 strfieldcat(devpath, path);
72 execle(UDEV_BIN, "udev", subsystem, NULL, env);
73 dbg("exec of child failed");
77 dbg("fork of child failed");
84 static void udev_scan(void)
91 dir = opendir(SYSBLOCK);
93 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
94 char dirname[MAX_PATHLEN];
98 if ((strcmp(dent->d_name, ".") == 0) ||
99 (strcmp(dent->d_name, "..") == 0))
102 snprintf(dirname, MAX_PATHLEN, "/block/%s", dent->d_name);
103 dirname[MAX_PATHLEN-1] = '\0';
104 udev_exec(dirname, "block");
106 snprintf(dirname, MAX_PATHLEN, "%s/%s", SYSBLOCK, dent->d_name);
107 dir2 = opendir(dirname);
109 for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
110 char dirname2[MAX_PATHLEN];
112 struct dirent *dent3;
114 if ((strcmp(dent2->d_name, ".") == 0) ||
115 (strcmp(dent2->d_name, "..") == 0))
118 snprintf(dirname2, MAX_PATHLEN, "%s/%s", dirname, dent2->d_name);
119 dirname2[MAX_PATHLEN-1] = '\0';
121 dir3 = opendir(dirname2);
123 for (dent3 = readdir(dir3); dent3 != NULL; dent3 = readdir(dir3)) {
124 char filename[MAX_PATHLEN];
126 if (strcmp(dent3->d_name, "dev") == 0) {
127 snprintf(filename, MAX_PATHLEN, "/block/%s/%s",
128 dent->d_name, dent2->d_name);
129 filename[MAX_PATHLEN-1] = '\0';
130 udev_exec(filename, "block");
143 dir = opendir(SYSCLASS);
145 for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
146 char dirname[MAX_PATHLEN];
148 struct dirent *dent2;
150 if ((strcmp(dent->d_name, ".") == 0) ||
151 (strcmp(dent->d_name, "..") == 0))
154 snprintf(dirname, MAX_PATHLEN, "%s/%s", SYSCLASS, dent->d_name);
155 dirname[MAX_PATHLEN] = '\0';
156 dir2 = opendir(dirname);
158 for (dent2 = readdir(dir2); dent2 != NULL; dent2 = readdir(dir2)) {
159 char dirname2[MAX_PATHLEN-1];
161 struct dirent *dent3;
163 if ((strcmp(dent2->d_name, ".") == 0) ||
164 (strcmp(dent2->d_name, "..") == 0))
167 snprintf(dirname2, MAX_PATHLEN, "%s/%s", dirname, dent2->d_name);
168 dirname2[MAX_PATHLEN-1] = '\0';
170 dir3 = opendir(dirname2);
172 for (dent3 = readdir(dir3); dent3 != NULL; dent3 = readdir(dir3)) {
173 char filename[MAX_PATHLEN];
175 if (strcmp(dent3->d_name, "dev") == 0) {
176 snprintf(filename, MAX_PATHLEN, "/class/%s/%s",
177 dent->d_name, dent2->d_name);
178 filename[MAX_PATHLEN-1] = '\0';
179 udev_exec(filename, dent->d_name);
193 int main(int argc, char *argv[], char *envp[])
195 init_logging("udevstart");