4 * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
5 * Copyright (C) 2004-2005 Kay Sievers <kay.sievers@vrfy.org>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation version 2 of the License.
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 675 Mass Ave, Cambridge, MA 02139, USA.
33 #include "libsysfs/sysfs/libsysfs.h"
34 #include "udev_libc_wrapper.h"
36 #include "udev_utils.h"
40 static int devpath_to_db_path(const char *devpath, char *filename, size_t len)
44 /* add location of db files */
45 strlcpy(filename, udev_root, len);
46 start = strlcat(filename, "/"DB_DIR, len);
47 end = strlcat(filename, devpath, len);
51 /* replace '/' to transform path into a filename */
52 for (i = start+1; i < end; i++)
53 if (filename[i] == '/')
54 filename[i] = PATH_TO_NAME_CHAR;
59 static int db_file_to_devpath(const char *filename, char *devpath, size_t len)
63 strlcpy(devpath, "/", len);
64 end = strlcat(devpath, filename, len);
66 /* replace PATH_TO_NAME_CHAR to transform name into devpath */
67 for (i = 1; i < end; i++)
68 if (devpath[i] == PATH_TO_NAME_CHAR)
74 int udev_db_add_device(struct udevice *udev)
76 char filename[PATH_SIZE];
77 struct name_entry *name_loop;
83 /* don't write anything if udev created only the node with the
84 * kernel name without any interesting data to remember
86 if (strcmp(udev->name, udev->kernel_name) == 0 &&
87 list_empty(&udev->symlink_list) && list_empty(&udev->env_list) &&
88 !udev->partitions && !udev->ignore_remove) {
89 dbg("nothing interesting to store in udevdb, skip");
93 devpath_to_db_path(udev->devpath, filename, sizeof(filename));
94 create_path(filename);
95 f = fopen(filename, "w");
97 err("unable to create db file '%s': %s", filename, strerror(errno));
100 dbg("storing data for device '%s' in '%s'", udev->devpath, filename);
102 fprintf(f, "N:%s\n", udev->name);
103 list_for_each_entry(name_loop, &udev->symlink_list, node)
104 fprintf(f, "S:%s\n", name_loop->name);
105 fprintf(f, "M:%u:%u\n", major(udev->devt), minor(udev->devt));
106 if (udev->partitions)
107 fprintf(f, "A:%u\n", udev->partitions);
108 if (udev->ignore_remove)
109 fprintf(f, "R:%u\n", udev->ignore_remove);
110 list_for_each_entry(name_loop, &udev->env_list, node)
111 fprintf(f, "E:%s\n", name_loop->name);
118 int udev_db_get_device(struct udevice *udev, const char *devpath)
120 char filename[PATH_SIZE];
121 char line[PATH_SIZE];
122 unsigned int major, minor;
129 devpath_to_db_path(devpath, filename, sizeof(filename));
130 if (file_map(filename, &buf, &bufsize) != 0) {
131 info("no db file to read %s: %s", filename, strerror(errno));
135 strlcpy(udev->devpath, devpath, sizeof(udev->devpath));
137 while (cur < bufsize) {
138 count = buf_get_line(buf, bufsize, cur);
144 if (count > sizeof(udev->name))
145 count = sizeof(udev->name);
146 memcpy(udev->name, &bufline[2], count-2);
147 udev->name[count-2] = '\0';
150 if (count > sizeof(line))
151 count = sizeof(line);
152 memcpy(line, &bufline[2], count-2);
153 line[count-2] = '\0';
154 sscanf(line, "%u:%u", &major, &minor);
155 udev->devt = makedev(major, minor);
158 if (count > sizeof(line))
159 count = sizeof(line);
160 memcpy(line, &bufline[2], count-2);
161 line[count-2] = '\0';
162 name_list_add(&udev->symlink_list, line, 0);
165 if (count > sizeof(line))
166 count = sizeof(line);
167 memcpy(line, &bufline[2], count-2);
168 line[count-2] = '\0';
169 udev->partitions = atoi(line);
172 if (count > sizeof(line))
173 count = sizeof(line);
174 memcpy(line, &bufline[2], count-2);
175 line[count-2] = '\0';
176 udev->ignore_remove = atoi(line);
179 if (count > sizeof(line))
180 count = sizeof(line);
181 memcpy(line, &bufline[2], count-2);
182 line[count-2] = '\0';
183 name_list_add(&udev->env_list, line, 0);
187 file_unmap(buf, bufsize);
189 if (udev->name[0] == '\0')
195 int udev_db_delete_device(struct udevice *udev)
197 char filename[PATH_SIZE];
199 devpath_to_db_path(udev->devpath, filename, sizeof(filename));
205 int udev_db_lookup_name(const char *name, char *devpath, size_t len)
207 char dbpath[PATH_MAX];
211 strlcpy(dbpath, udev_root, sizeof(dbpath));
212 strlcat(dbpath, "/"DB_DIR, sizeof(dbpath));
213 dir = opendir(dbpath);
215 err("unable to open udev_db '%s': %s", dbpath, strerror(errno));
221 char filename[PATH_SIZE];
222 char nodename[PATH_SIZE];
230 if (ent == NULL || ent->d_name[0] == '\0')
232 if (ent->d_name[0] == '.')
235 snprintf(filename, sizeof(filename), "%s/%s", dbpath, ent->d_name);
236 filename[sizeof(filename)-1] = '\0';
237 dbg("looking at '%s'", filename);
239 if (file_map(filename, &buf, &bufsize) != 0) {
240 err("unable to read db file '%s': %s", filename, strerror(errno));
245 while (cur < bufsize && !found) {
246 count = buf_get_line(buf, bufsize, cur);
253 if (count > sizeof(nodename))
254 count = sizeof(nodename);
255 memcpy(nodename, &bufline[2], count-2);
256 nodename[count-2] = '\0';
257 dbg("compare '%s' '%s'", nodename, name);
258 if (strcmp(nodename, name) == 0) {
259 db_file_to_devpath(ent->d_name, devpath, len);
267 file_unmap(buf, bufsize);
277 int udev_db_get_all_entries(struct list_head *name_list)
279 char dbpath[PATH_MAX];
282 strlcpy(dbpath, udev_root, sizeof(dbpath));
283 strlcat(dbpath, "/"DB_DIR, sizeof(dbpath));
284 dir = opendir(dbpath);
286 err("unable to open udev_db '%s': %s", dbpath, strerror(errno));
292 char filename[PATH_SIZE] = "/";
296 if (ent == NULL || ent->d_name[0] == '\0')
298 if (ent->d_name[0] == '.')
301 end = strlcat(filename, ent->d_name, sizeof(filename));
302 for (i = 1; i < end; i++)
303 if (filename[i] == PATH_TO_NAME_CHAR)
305 name_list_add(name_list, filename, 1);
306 dbg("added '%s'", filename);